Dummy sound generating apparatus and dummy sound generating method and computer product

The present invention relates to a simulated sound generator, a vehicle, a simulated sound generating method, and a simulated sound generating program. However, the use of the present invention is not limited to the above-mentioned simulated sound generator, vehicle, simulated sound generating method, and simulated sound generating program.

In recent years, vehicles using not only internal combustion engines but also electric motors have been developed and marketed, and the noise caused by the so-called engine noise of conventional internal combustion engines has been significantly reduced.

In addition, a simulated sound generator for electric vehicles that can generate simulated sounds of starting sound, running sound, and acceleration / deceleration sound during running, which are suitable for electric vehicles, and can adjust the simulated volume according to ambient noise. (See, for example, Patent Document 1).

<patcit num="1"><text>Japanese Unexamined Patent Publication No. 7-182587</text></patcit>

<p> However, in the above-mentioned conventional technology, since the simulated sound can be automatically adjusted in response to the ambient noise, it is possible to reduce the noise at night or in a quiet place, but the engine noise is eliminated. Pedestrians and the like may develop an unexpected accident without noticing the approach of the vehicle. Normally, pedestrians and the like unknowingly detect the approach of the vehicle by the engine sound, so if the approach of the vehicle is notified by a sound or light other than the simulated sound, it may cause discomfort. There was a problem that it could cause unnecessary stress.</p>

<p> The simulated sound generator according to the invention according to claim 1 is a simulated sound generator that generates a simulated sound in a vehicle, and is a simulated sound information storage means for storing information about the simulated sound and the simulated sound information storage. Based on the information stored by the means, the out-of-vehicle generating means for generating the simulated sound outside the vehicle, the generating location information storing means for storing the information regarding the place where the simulated sound is generated, and the current state of the vehicle. The current position information acquisition means for acquiring information about the position, and<u style="single">A detection means for detecting a predetermined situation when the vehicle is traveling, an instruction input means for receiving an instruction to start / end the generation of the pseudo sound, and a start / end of the pseudo sound generated by the instruction input means. Detection information storage means for storing information about an object moving in a direction approaching the vehicle and an object moving in a direction away from the vehicle among the predetermined situations detected by the detection means when an instruction is given. When,</u>Information stored by the generation location information storage means<u style="single">When,</u>Information acquired by the current position information acquisition means<u style="single">And the result detected by the detection means, and the information stored by the detection information storage means.</u>On the basis of<u style="single">、</u>It is characterized by including a control means for controlling the output of a pseudo sound generation instruction signal to the out-of-vehicle generating means.</p><p> Also, claims<u style="single">15</u>The vehicle according to the invention described in the above claim.<u style="single">1~14</u>It is characterized in that the pseudo sound generator according to any one of the above is provided.</p><p> Also, claims<u style="single">16</u>The simulated sound generation method according to the invention described in the above is a simulated sound generating method for generating a simulated sound in a vehicle.<u style="single">A pseudo sound information storage step that stores information about the simulated sound, an out-of-vehicle generation step that generates the simulated sound outside the vehicle based on the information stored by the simulated sound information storage step, and the simulated sound. The generation location information storage process that stores information about the location where the vehicle is generated, the current position information acquisition process that acquires information about the current position of the vehicle, and the detection process that detects a predetermined situation when the vehicle is traveling. An instruction input process for receiving an instruction to start / end the generation of the simulated sound, and the predetermined determination detected by the detection process when the instruction to start / end the generation of the simulated sound is instructed by the instruction input process. Among the situations, a detection information storage step for storing information about an object moving in a direction approaching the vehicle and an object moving in a direction away from the vehicle, information stored by the generation location information storage process, and the present Output of a pseudo sound generation instruction signal to the out-of-vehicle generation process based on the information acquired by the position information acquisition process, the result detected by the detection process, and the information stored by the detection information storage process. It is characterized by including a control process for controlling the above.</u></p><p> Also, claims<u style="single">17</u>The simulated sound generation program according to the invention described in the above claim.<u style="single">16</u>It is characterized by having a computer perform the method described in.</p>

Hereinafter, preferred embodiments of the simulated sound generator, vehicle, simulated sound generation method, and simulated sound generation program according to the present invention will be described in detail with reference to the accompanying drawings.

(Functional configuration of simulated sound generator) First, the contents of the simulated sound generator according to the embodiment of the present invention will be described. FIG. 1 is a block diagram showing an example of a functional configuration of the simulated sound generator according to the embodiment of the present invention. In FIG. 1, the pseudo sound generators provided in a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle) include a simulated sound information storage unit 101, an out-of-vehicle generation unit 102, a generation location information storage unit 103, and current position information. The acquisition unit 104, the control unit 105, the generation location information input unit 106, the pseudo sound generation notification unit 107, the instruction promotion notification unit 108, the sound collection unit 109, the in-vehicle generation unit 110, and the detection unit 113. , The instruction input unit 115, and the detection information storage unit 116.

The simulated sound information storage unit 101 stores information regarding the simulated sound generated in the vehicle. Here, the simulated sound is specifically, for example, a sound obtained by simulating the engine sound and the brake sound of a vehicle. Further, the simulated sound information storage unit 101 may store information related to a plurality of types of simulated sounds. Specifically, the plurality of types of simulated sounds are sounds in a plurality of bands, for example.

The out-of-vehicle generation unit 102 generates a pseudo sound outside the vehicle based on the information about the pseudo sound stored by the pseudo sound information storage unit 101. Specifically, for example, the engine sound and the brake sound of the vehicle are simulated, and the synthesized simulated sound is output by, for example, a speaker provided outside the vehicle.

The generation location information storage unit 103 stores information regarding the location where the pseudo sound is generated. The place where the simulated sound is generated may be a place that can be specified by longitude / latitude (for example, " chome intersection", " elementary school back gate", etc.), and is a general public place. It may be a location (eg, "school zone", "intersection", etc.).

The current position information acquisition unit 104 acquires information regarding the current position of the vehicle. Specifically, for example, this function is realized by acquiring information on longitude and latitude by GPS410, which will be described later.

The control unit 105 controls the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104.

Further, the control unit 105 may control the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 based on at least one of the calendar information and the time information. Specifically, the simulated sound generation instruction signal is, for example, a signal instructing on (start) / off (end) of simulated sound generation.

Further, the control unit 105 changes the direction in which the pseudo sound is generated by the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104. You may do so. Specifically, for example, when traveling straight, a simulated sound is generated in the forward direction, and when the steering wheel is turned to the left or right and the vehicle turns to the left or right, the simulated sound is generated in the turning direction. Let it occur.

Further, the control unit 105 relates to a plurality of types of simulated sounds stored by the simulated sound information storage unit 101 based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104. A pseudo sound selection signal that selects at least one of the information may be output.

Further, the control unit 105 controls the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104. At the same time, the output of the volume control instruction signal may be controlled to an audio device 111 (for example, a CD player, an MD player, a cassette tape player, a DVD player, a car navigation system, etc.) provided in the vehicle. Specifically, the volume control instruction signal is an instruction signal that mutes or reduces the volume of the audio being output to a predetermined amount, for example. As a result, it is possible to make it easier for the driver / passenger of the vehicle to understand that the simulated sound is generated.

The generation location information input unit 106 accepts input of information regarding the location where the pseudo sound is generated. Then, the generation location information storage unit 103 stores the information received by the generation location information input unit 106.

The simulated sound generation notification unit 107 notifies that a simulated sound is being generated. Then, when the pseudo sound generation instruction signal is output to the out-of-vehicle generation unit 102, the control unit 105 controls the output of the generation notification instruction signal to the pseudo sound generation notification unit 107.

The instruction promotion notification unit 108 makes a notification prompting an instruction to generate a pseudo sound. Then, the control unit 105 is a vehicle based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104, or based on the information stored by the detection information storage unit 116. Instead of controlling the output of the pseudo sound generation instruction signal to the external generation unit 102, the output control of the instruction promotion notification instruction signal to the instruction promotion notification unit 108 is performed.

The sound collecting unit 109 collects the ambient sound outside the vehicle including the simulated sound generated outside the vehicle by the outside generating unit 102. Specifically, the function is realized by, for example, a microphone (microphone) provided outside the vehicle. Further, the in-vehicle generation unit 110 generates a simulated sound collected by the sound collecting unit 109 in the vehicle. Specifically, the vehicle interior generation unit 110 outputs the vehicle exterior ambient sound collected by, for example, a speaker provided outside the vehicle.

The detection unit 113 detects various predetermined situations when the vehicle is traveling. Specifically, the detection unit 113 detects, for example, the speed of the vehicle, the number of revolutions of the engine, the state of the transmission (gear), and, for example, the situation outside the vehicle. Conditions outside this vehicle include at least one of weather conditions, road conditions, pedestrian conditions and other vehicle conditions, including bicycles. Further, the detection unit 113 may detect the position where the vehicle is traveling.

In addition, the detection unit 113 detects various predetermined situations when the vehicle is running, or in addition to detecting various predetermined situations when the vehicle is running, the detection unit 113 of the vehicle. The state of operation may be detected. Specifically, the operating state of the vehicle is the operating state of, for example, the steering wheel, the accelerator, the brake, the transmission, the lighting switch of the light, and the wiper. Further, the detection unit 113 may detect the state of the driver of the vehicle. Specifically, the state of the driver of the vehicle is, for example, the degree of fatigue of the driver, the continuous driving time, and the like.

Then, at that time, the control unit 105 generates the sound outside the vehicle based on the information stored by the generation location information storage unit 103, the information acquired by the current position information acquisition unit 104, or the result detected by the detection unit 113. Controls the output of the pseudo sound generation instruction signal to unit 102.

Further, the control unit 105 is determined by the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103, the information acquired by the current position information acquisition unit 104, or the result detected by the detection unit 113. The direction in which the simulated sound is generated may be changed.

Further, the control unit 105 is based on the information stored by the generation location information storage unit 103, the information acquired by the current position information acquisition unit 104, or the result detected by the detection unit 113, and the pseudo sound information storage unit 101. A pseudo sound selection signal for selecting at least one of a plurality of types of simulated sounds stored in the above may be output.

Further, the control unit 105 sends the out-of-vehicle generation unit 102 to the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103, the information acquired by the current position information acquisition unit 104, or the result detected by the detection unit 113. In addition to controlling the output of the simulated sound generation instruction signal, the output of the volume control instruction signal may be controlled to the audio device 111 provided in the vehicle.

The instruction input unit 115 receives an instruction to start / end the generation of a simulated sound provided in the vehicle. Specifically, the instruction input unit 115 receives an instruction to start / end the pseudo sound generation by turning on / off the pseudo sound generation switch provided in the vehicle, for example.

The detection information storage unit 116 stores information regarding the result detected by the detection unit 113 when the instruction input unit 115 gives an instruction to start / end the generation of the pseudo sound. Then, the control unit 105 controls the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 based on the start / end instruction of the pseudo sound generation by the instruction input unit 115, and is stored by the detection information storage unit 116. Based on the obtained information and the result detected by the detection unit 113, the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 is controlled.

Specifically, the control unit 105 specifically stores the weather condition, the road condition, the pedestrian condition, and other vehicles including the bicycle, which are stored in the detection information storage unit 116 when the start instruction of the simulated sound is given. Includes any one or more of the conditions, vehicle operating conditions, vehicle driver conditions, and weather conditions, road conditions, pedestrian conditions, and bicycles detected by detector 113. Compares any one of the conditions of other vehicles, the operation status of the vehicle, and the condition of the driver of the vehicle, or a combination of two or more of them, and outputs a pseudo sound instruction signal when both match. .. The same applies to the end instruction for generating the simulated sound.

In this way, the control unit 105 performs the above-mentioned various controls, but each of these controls may be performed independently, or a plurality of these controls may be arbitrarily combined.

(Procedure for processing the pseudo sound generation method) Next, the procedure for processing the simulated sound generation method according to the embodiment of the present invention will be described. FIG. 2 is a flowchart showing an example of a procedure for processing the simulated sound generation method according to the embodiment of the present invention. In the flowchart of FIG. 2, first, it is determined whether or not the vehicle has started traveling (step S201).

In step S201, when the vehicle waits for the vehicle to start traveling and is started (step S201: Yes), the pseudo sound is generated by turning on the pseudo sound generation switch provided in the vehicle. It is determined whether or not there is an instruction to start (step S202). Here, if the pseudo sound generation switch is not turned on (step S202: No), the process proceeds to step S208 without doing anything.

On the other hand, when the pseudo sound generation switch is turned on in step S202 (step S202: Yes), the information (generation place information) or the situation regarding the place (position) at that time is detected and stored (step S203). Then, it is determined whether or not the simulated sound is already being generated (step S204). Here, if the simulated sound is already being generated (step S204: Yes), the process proceeds to step S208 without doing anything.

On the other hand, when the simulated sound is not being generated (step S204: No), it is further determined whether or not the audio device is operating (step S205). Here, if the audio device is not operating (step S205: No), the process proceeds to step S207 without doing anything. On the other hand, when the audio device is in operation (step S205: Yes), the volume of the audio device is adjusted (step S206) and a simulated sound is generated (step S207). Here, when the simulated sound is generated, the driver / passenger may be notified that the simulated sound is generated.

After that, in step S208, it is determined whether or not there is an instruction to end the simulated sound generation by turning off the simulated sound generation switch provided in the vehicle. Here, when the pseudo sound generation switch is turned off (step S208: Yes), the information regarding the location (position) at that time (generation location information) or the situation at that time is detected and the information regarding the detected situation is stored. (Step S209), and the process proceeds to step S212.

On the other hand, in step S208, when the simulated sound generation switch is not turned off (step S208: No), it is nextly determined whether the current position is the simulated sound generation location or whether a predetermined situation is detected (step S208). S210). Here, if the current position is not the place where the simulated sound is generated, or if a predetermined situation is not detected (step S210: No), the process proceeds to step S216. On the other hand, when the current position is the place where the simulated sound is generated, or when a predetermined situation is detected (step S210: Yes), the detected situation is related to the start instruction or the end instruction. Is determined (step S211).

In step S211, if it is a start instruction (step S211: start), the process returns to step S204, while if it is an end instruction (step S211: end), the process proceeds to step S212.

In step S212, it is determined whether or not a simulated sound is being generated. Here, if the simulated sound is not being generated (step S212: No), the process proceeds to step S216 without doing anything. On the other hand, when the simulated sound is being generated (step S212: Yes), the simulated sound is stopped (step S213). Here, if a notification is made when the simulated sound is generated, the notification is also stopped.

Further, it is determined whether or not the audio device is in operation (step S214). Here, if the audio device is not operating (step S214: No), the process proceeds to step S216 without doing anything. On the other hand, if the audio device is in operation (step S214: Yes), adjust the volume of the audio device (step S215). Specifically, for example, the volume is returned to the volume before the simulated sound is generated, and then the process proceeds to step S216.

In step S216, it is determined whether or not the running is completed (step S216). Here, if the running has not been completed yet (step S216: No), the process returns to step S202, and then steps S202 to S216 are repeated. Then, when the running is completed (step S216: Yes), a series of processes is completed.

Further, FIG. 3 is a flowchart showing another example of the procedure for processing the simulated sound generation method according to the embodiment of the present invention. In the flowchart of FIG. 3, instead of actually generating a simulated sound, the vehicle operator and passengers are notified of the simulated sound instruction promotion. In the flowchart of FIG. 3, first, it is determined whether or not the vehicle has started traveling (step S301).

In step S301, when the vehicle waits for the vehicle to start traveling and is started (step S301: Yes), the pseudo sound is generated by turning on the pseudo sound generation switch provided in the vehicle. It is determined whether or not there is an instruction to start (step S302). Here, if the simulated sound generation switch is not turned on (step S302: No), the process proceeds to step S306 without doing anything.

On the other hand, in step S302, when the pseudo sound generation switch is turned on (step S302: Yes), the information (generation place information) regarding the place (position) at that time or the situation at that time is detected and stored (step). S303). Then, it is determined whether or not the simulated sound is already being generated (step S304). Here, if the simulated sound is already being generated (step S304: Yes), the process proceeds to step S306 without doing anything. On the other hand, when the simulated sound is not being generated (step S304: No), the driver / passenger is urged to instruct the simulated sound to be generated by notifying the driver / passenger to turn on the simulated sound generation switch (step S305).

After that, in step S306, it is determined whether or not there is an instruction to end the simulated sound generation by turning off the simulated sound generation switch provided in the vehicle. Here, when the pseudo sound generation switch is turned off (step S306: Yes), the information regarding the location (position) at that time (generation location information) or the situation at that time is detected, and the information regarding the detected situation is displayed. It is memorized (step S307), and the process proceeds to step S310.

Next, in step S310, it is determined whether or not a simulated sound is being generated. Here, if the simulated sound is not being generated (step S310: No), the process proceeds to step S312 without doing anything. On the other hand, when the simulated sound is being generated (step S310: Yes), the simulated sound is stopped (step S311), and the process proceeds to step S312.

On the other hand, if the simulated sound generation switch is not turned off in step S306 (step S306: No), it is next determined whether the current position is the simulated sound generation location or whether a predetermined situation has been detected (step S306: No). Step S308). Here, if the current position is not the place where the simulated sound is generated, or if a predetermined situation is not detected (step S308: No), the process proceeds to step S312. On the other hand, when the current position is the place where the simulated sound is generated, or when a predetermined situation is detected (step S308: Yes), the detected situation is related to the start instruction or the end instruction. Is determined (step S309).

In step S309, if it is a start instruction (step S309: start), the process returns to step S304, while if it is an end instruction (step S309: end), the process proceeds to step S310.

Next, in step S310, it is determined whether or not a simulated sound is being generated. Here, if the simulated sound is not being generated (step S310: No), the process proceeds to step S312 without doing anything. On the other hand, when the simulated sound is being generated (step S310: Yes), the driver / passenger is urged to stop the simulated sound by notifying the driver / passenger to turn off the simulated sound generation switch (step S311). Here, the simulated sound may be stopped without prompting the stop instruction. After that, it shifts to Tep S312.

In step S312, it is determined whether or not the running is completed. Here, if the running has not been completed yet (step S312: No), the process returns to step S302, and then steps S302 to S312 are repeated. Then, when the running is completed (step S312: Yes), a series of processes is completed.

(Necessity of imitation sound) Next, the necessity of a pseudo sound (pseudo running sound, specifically, for example, an engine sound) will be described. Normally, pedestrians and the like generally recognize the approach / passage of a vehicle, which cannot be visually recognized, such as behind, by hearing, and sometimes look back to detect danger. Therefore, if there is no sound even though the vehicle is approaching, the pedestrian often does not notice the approach of the vehicle, and the accident associated therewith becomes a problem.

However, when a horn warning sound or an artificial warning sound is emitted when backing up, pedestrians may be surprised, uncomfortable, or feel unnecessary stress due to the sound. There are many. Therefore, it is important to make pedestrians and the like recognize the approach / passage of the vehicle without being unconsciously or strongly aware of it. In other words, the inventor thinks that it is only necessary to make them aware because the problem is that they do not notice. Therefore, it is necessary to generate a simulated sound that is normally generated, and by generating it only when necessary, it is possible to prevent noise and ensure the safety of pedestrians.

(Hardware configuration) Next, the hardware configuration of the simulated sound generator according to the embodiment of the present invention will be described. FIG. 4 is a block diagram showing a hardware configuration of a simulated sound generator according to an embodiment of the present invention.

In FIG. 4, 401 indicates the CPU that controls the entire simulated sound generator, 402 indicates the ROM that stores the basic processing program of the simulated sound generator, and 403 indicates the RAM that is used as the work area of the CPU 401. There is. The 404 indicates an HDD (hard disk drive) that controls data read / write to the HD (hard disk) 405 under the control of the CPU 401, and the 405 indicates an HD that stores data written under the control of the HDD 404. ing. In addition, instead of HD or separately from HD, a removable recording medium such as a CD or DVD (not shown) may be provided.

Further, 406 is an I / F, and this I / F 406 is connected to various devices 410 to 418 described later via wireless or cable, and functions as an interface between the various devices and the CPU 401. Further, 400 indicates a bus for connecting each of the above parts. These 400 to 406 realize the function of the control unit 105 shown in FIG.

410 is GPS (Global Positioning Systems). The GPS410 receives radio waves from GPS satellites and obtains a geometric position with the GPS satellites, and can measure anywhere on the earth. The radio waves are 1.575.42MHz carrier waves, and L1 radio waves carrying C / A (Coarse and Access) codes and navigation messages are used. The C / A code has a bit rate of 1.023 Mbps, and the code length is 1023 bit = 1 ms. In addition, the navigation message has a bit rate of 50 bps, the code length is 300 bit = 6 s for the subframe, 1500 bit = 30 s for the main frame, 5 subframes are 1 mainframe, and 25 mainframes are 1 master. It is a frame. This detects the current vehicle position (latitude and longitude).

Reference numeral 411 is a group of various switches including a pseudo sound generation instruction switch, which realizes the function of the instruction input unit 115 shown in FIG. The switch also includes a touch panel button on the display 414, which will be described later. The 412 is a microphone that collects ambient sound outside the vehicle, and realizes the function of the sound collecting unit 109 shown in FIG. The 413 is an audio device including a CD drive, an MD drive, a DVD drive, and the like, and realizes the functions of the audio device 111 shown in FIG.

Further, 414 is a display for display such as a liquid crystal display and an organic EL display, and 415 is various lamps such as LEDs. The display 414 and various lamps 415 provide a simulated sound generation notification unit 107 and an instruction promotion notification unit 108. To realize the function of. The lamp 415 can announce a predetermined message according to the emission color (for example, orange LED) and the timing of blinking. 416 is a speaker switching device that switches the output direction of the external speaker 419, which will be described later, 417 is an amplifier (amplifier) that controls the output of the external speaker 419, and 418 is an amplifier (amplifier) that controls the output of the in-vehicle speaker 420. Is. The amplifier 417 outputs (generates) the synthesized simulated sound by the external speaker 419 based on the control signal transmitted via the I / F 406.

(Configuration of detector 113) Next, an example of a detailed configuration of the detection unit 113 shown in FIGS. 1 and 3 will be described. FIG. 5 is an explanatory diagram showing the configuration of the detection unit 113 of the simulated sound generator according to the embodiment of the present invention. In FIG. 5, the detection unit 113 detects the state of the vehicle, such as the vehicle speed sensor 501, the accelerator pedal sensor 502, the brake pedal sensor 503, the handle steering angle sensor 504, the gear operation sensor 505, and the wiper operation sensor. 506, presence / absence of operation of direction indicator (winker), direction indicator operation sensor 507, horn (claction) operation sensor 508, infrared sensor 511, millimeter wave radar 512, Doppler radar 513, infrared camera 514 Etc. are provided. In particular, a millimeter-wave radar 512 and an infrared camera 514 may be used to recognize external conditions.

Here, the vehicle speed sensor 501 detects, for example, GPS410, as well as the speed of the vehicle. The accelerator pedal sensor 502 detects the degree of depression of the accelerator pedal, the opening degree of the throttle, and the like. The brake pedal sensor 503 detects the degree of depression of the brake pedal and the like. The steering wheel steering angle sensor 504 detects the steering angle or steering speed (whether the steering wheel is turned quickly or slowly, etc.) when the steering wheel is steered to the left or right.

Further, the gear operation sensor 505 detects the state of the shifted gear or the automatically switched gear. The wiper operation sensor 506 detects whether or not the wiper is operating, the operating speed, and the like. The direction indicator operation sensor 507 detects whether or not the direction indicator (winker) is operating, which direction the instruction is in, the operating time, and the like. The horn operation sensor 508 detects whether the horn (horn) is activated, the operating time, and whether the horn button (usually a predetermined part of the steering wheel) is not pressed but the hand is in contact with the horn button. To do.

The infrared sensor 511 detects whether or not the moving object is a living object. The millimeter-wave radar 512 also detects the distance to the object and the speed of the object. The millimeter-wave radar 512 is a device that detects obstacles using radio waves, similar to radar used in airplanes and the like. The millimeter-wave radar 512 constantly searches for obstacles in front of the vehicle, and the data is monitored by a computer on the vehicle to predict a collision in advance. The other is to predict a collision from the driver's sudden braking.

In addition, the infrared sensor 511 is a radar system that can detect a situation of about 100 meters, can be used even in fog, rain, and snow, and uses a 76 GHz charged wave with an antenna power of 10 mm watt or less. Developed for the inter-vehicle control device (ACC) system that is installed in front of the vehicle and detects the distance and relative speed to the vehicle running in front to support safe driving, it is important to compose ITS (Intelligent Transport Systems). It is a system.

The Doppler radar 513 detects the relative speed between the vehicle and the object. Thereby, when the object is a pedestrian or a bicycle, it is possible to recognize whether the object is moving in the same direction as the vehicle or moving in the opposite direction.

The infrared camera 514 detects pedestrians at night that may be overlooked by headlights and street lights and alerts the driver. Infrared rays detect human heat sources even at night and discover living things.

Further, as a device for detecting the state of the driver, a biosensor 521, an in-vehicle camera 522, a continuous running time counter 523, and the like are provided. The biosensor 521 detects the driver's heart rate and the like. In addition, the vehicle interior camera 522 detects the driver, eye movements, body movements, and the like. The continuous running time clock unit 523 measures the time of continuous running and estimates the degree of fatigue of the driver based on the time measured.

In addition, a raindrop sensor 531, a temperature / humidity sensor 532, a wind force / wind direction sensor 533, and the like are provided to detect the situation outside the vehicle. Here, the raindrop sensor 531 detects the presence / absence, amount, and the like of raindrops. In the case of rain, the approach of the vehicle is often not noticed by the sound of rain, so in the case of fine weather, the simulated sound may be generated even in a place where the simulated sound is not generated. In addition, the temperature / humidity sensor 532 detects the temperature and humidity outside the vehicle. The wind power / wind direction sensor 533 detects the wind power and the wind direction outside the vehicle. On a windy day, the approach of the vehicle is often not noticed by the wind noise, so the simulated sound may be generated even in a place where the simulated sound is not normally generated.

(Hard disk (HD) 405 configuration) The hard disk (HD) 405 realizes the functions of the pseudo sound information storage unit 101 and the detection information storage unit 116 shown in FIG. The HD405 is sequence software that plays back MIDI (Musical Instrument Digital Interface) sound sources and MIDI data for reproducing simulated sounds of multiple types of engine sounds and brake sounds as a simulated sound information storage unit 101. And so on.

Multiple types of engine sounds and brake sounds include those with different bands. The simulated sound should be as close to the engine sound and brake sound as possible so that the pedestrian can intuitively grasp the size of the vehicle from the sound, considering the size of the vehicle as much as possible. For example, a simulated sound different from that of an ordinary passenger car and a truck or a bus is used. Further, the simulated sound may be a sound in a band that is easier to hear even for a relatively deaf person such as an elderly person.

The HD405 also stores map data used for displaying the GPS410. Specifically, for example, it is information about roads and buildings corresponding to position information (latitude / longitude) acquired or stored in advance by GPS410.

Further, the HD405 stores the information detected by the detection unit 113 as the detection information storage unit 116 shown in FIG. FIG. 6 is an explanatory diagram showing an example of information stored in the hard disk (HD) 405 that functions as the detection information storage unit 116.

In FIG. 6, the information detected at each predetermined time interval includes "date and time" item 601, "position" item 602, "direction" item 603, "moving object" item 604, "vehicle speed" item 605, and "temperature / temperature". Includes "humidity" item 606 and the like. The information stored in the "date and time" item 601 is used, for example, to determine whether or not the zone is a danger zone depending on the time zone. Specifically, for example, if the same place falls under the commuting time, the danger zone is judged, and other than that, it is judged that the danger zone is not. In the "position" item 602, numerical values related to latitude (n (or s)) and longitude (e (or w)) detected and calculated by GPS410 are stored. Information about the moving direction of the vehicle is stored in the "direction" item 603. The moving direction of the vehicle can be calculated from the longitude and latitude detected immediately before and the longitude and latitude detected this time.

Further, in the "moving body" item 604, information on an object (pedestrian, bicycle, etc.) that moves in the same direction as the movement of the vehicle and an object that moves in the direction opposite to the movement of the vehicle is stored. If "same direction: 0, face-to-face direction: 3", there are no things that move away (pedestrians, bicycles), and there are three things that move closer (pedestrians, bicycles). Is shown. Specifically, the direction detection of a pedestrian or a bicycle may be performed, for example, by analyzing a face image of a pedestrian and determining whether the pedestrian is turning his back on the vehicle or heading toward the vehicle. Further, the millimeter wave radar 512 may be used to check the relative speed with the vehicle, and if the relative speed is large, it may be determined that the vehicle is facing the vehicle, and if the relative speed is small, it may be determined that the vehicle is traveling in the same direction as the vehicle.

Further, in the "vehicle speed" item 605, information on the vehicle speed acquired from the vehicle speed sensor 501 or the like is stored. In the temperature / humidity item 606, information on temperature and humidity acquired from, for example, the temperature / humidity sensor 532 is stored. The control unit 105 shown in FIG. 1 controls the output of the pseudo sound generation instruction signal or the instruction promotion notification instruction signal based on this information.

Further, although not shown, information regarding noise around the moving vehicle may be stored. Depending on the volume of the stored ambient noise, it is possible to generate or not generate a simulated sound. Further, the volume of the simulated sound may be adjusted according to the volume of the ambient noise.

Further, the HD405 stores information regarding a determination table for controlling the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 shown in FIG. FIG. 7 is an explanatory diagram showing an example of a determination table stored in the HD405 that functions as the occurrence location information storage unit 103.

FIG. 7 is an example of a table that predicts a place (danger zone) where a simulated sound is required from map data. In the table shown in Fig. 7, when entering a facility across a sidewalk from a main road to enter a gas station, convenience store, etc., this place is judged to be a dangerous zone based on latitude / longitude information and map data. , Turn on the pseudo sound generation instruction switch. Similarly, when the vehicle is off the main road, such as a parking lot of a store, or when it is near the service area of the expressway, it is judged to be a dangerous zone.

More specifically, sound may only be needed for a short period of time. Sometimes you only need to cross an intersection, or you may only need to cross a sidewalk in a spot. Therefore, it may be necessary to memorize only that part. Further, as a condition for turning off the simulated sound generation instruction switch, for example, when entering an expressway or the like can be mentioned.

8 to 11 are explanatory views showing an example of a determination table stored in the HD405 that functions as the detection information storage unit 116. FIG. 8 is an example of a table that predicts a danger zone based on vehicle data (speed, steering angle of steering wheel, braking operation). In the table shown in Fig. 8, when the speed is slow, the steering wheel is frequently operated, the steering wheel is turned back, the vehicle runs off a straight line, and the brakes are often put on, put your hand on the horn. When the vehicle is operating, the location is determined to be a dangerous zone based on the information from each sensor, and the pseudo sound generation instruction switch is turned on.

Figure 9 is an example of a table that predicts dangerous zones from physiological data. In the table of FIG. 9, when the heart rate is high, there is a lot of eye movements, the driver is alert, there is a lot of body movement, and the driver is fidgeting, the biosensor 521 and the passenger compartment Based on the information from the camera 522 etc., this place (current time) is judged as a dangerous zone, and the pseudo sound generation instruction switch is turned on.

FIG. 10 is an example of a table for judging a danger zone from an image. In FIG. 10, when there is a person in the direction of travel of the vehicle, when it is raining, when there is no shoulder and the sidewalk cannot be recognized, etc., the millimeter wave radar 512, the infrared camera 514, the raindrop sensor 531 and the infrared sensor 511 Based on the information from such as, this place (current time) is judged as a danger zone, and the pseudo sound generation instruction switch is turned on.

FIG. 11 is an example of a table for predicting a danger zone from the route data of navigation using GPS410. In the table of FIG. 11, for example, when approaching the vicinity of the destination, when invading a shopping street, when it is a narrow road or a living road instead of a main road, or when judging from the set route and turning at an intersection. , When going out on a road thicker than a narrow road, invading a road narrower than a main road, driving on a road without a sidewalk, etc., determine this place as a dangerous zone based on latitude / longitude information and map data. Then, the pseudo sound generation instruction switch is turned on.

(Procedure of judgment processing of control unit 105) Next, a more specific procedure for determination processing of the control unit 105 will be described. 12 to 15 are flowcharts showing an example of the procedure of the determination process of the control unit 105. The flowchart of FIG. 12 shows the content of the judgment process based on the driver's condition. In the flowchart of FIG. 12, first, it is determined whether or not the current time is a preset danger zone (step S1201). Here, if it is a dangerous zone (step S1201: Yes), it is controlled to generate a simulated sound regardless of the detection results by various sensors (step S1204), and the process returns to step S1201.

On the other hand, if it is not in a dangerous zone (step S1201: No), whether the vehicle speed is slow and the steering wheel is operated frequently (step S1202) and whether the driver (driver) is nervous (step S1203). to decide. Then, if any of the cases is applicable (step S1202: Yes or step S1203: Yes), the pseudo sound is controlled to be generated (step S1204), and the process returns to step S1201.

On the other hand, if none of the above applies (step S1202: No and step S1203: No), the simulated sound is controlled to be stopped (step S1205), and the process returns to step S1201.

Further, the flowchart of FIG. 13 shows the content of the judgment process based on the situation outside the vehicle. In the flowchart of FIG. 13, first, it is determined whether or not the simulated sound generation instruction switch is turned on, and if it is turned on (step S1301: Yes), whether or not there is a pedestrian in front of the vehicle (step S1302). And whether or not the pedestrian is aware of the presence of the vehicle (step S1303) is determined. Here, if there are no pedestrians (step S1302: No) or if there are pedestrians (step S1302: Yes) but you are aware of the presence of the vehicle (step S1303: Yes), stop the simulated sound. (Step S1305) and return to step S1301.

On the other hand, in step S1303, when the presence of the vehicle is not noticed (step S1303: No), control is performed so as to generate a simulated sound (step S1304), and the process returns to step S1301. Then, in step S1301, when the switch is off (step S1301: No), the process ends. By doing so, it is possible to prevent the pseudo sound from being unnecessarily generated due to the switch being turned on.

Further, the flowchart of FIG. 14 shows the contents of the judgment process for examining the danger zone using the map data. In FIG. 14, according to the map data, whether or not the local point is a living road (step S1401), whether or not it has been operated in the past (step S1402), whether or not it is a parking lot, SA (service area) (step S1403), It is determined whether or not there is an intersection and whether or not to turn there (step S1404) and whether or not to cross the pedestrian crossing (step S1405).

Then, if any one of them is applicable (step S1401: Yes, step S1402: Yes, step S1403: Yes, step S1404: Yes or step S1405: Yes), it is judged that it is a dangerous zone and a simulated sound is produced. Control to occur (step S1407), then return to step S1401.

On the other hand, when all of the above are not applicable (step S1401: No, step S1402: No, step S1403: No, step S1404: No and step S1405: No), the simulated sound is controlled to be stopped (step S1406). Then return to step S1401. By doing so, it is possible to appropriately grasp the place where the simulated sound is required to be generated and effectively generate the simulated sound.

Further, the flowchart of FIG. 15 shows the contents of the process of controlling the volume of the audio device 413 in conjunction with the control of the simulated sound generation. In FIG. 15, first, it is determined whether or not there is a pedestrian in front (step S1501). Here, when there is a pedestrian (step S1501: Yes), it is determined whether or not the audio device 413 is ringing (step S1502), and the audio is muted (or only when it is ringing (step S1502: Yes)). Volume down) (step S1503), and if it is not ringing (step S1502: No), do nothing. Then, a simulated sound is generated (step S1504), and the process returns to step S1501.

On the other hand, in step S1501, when there is no pedestrian in front (step S1501: No), it is controlled to stop the simulated sound (step S1505), and then whether or not the audio device 413 is muted (or volume down). If it is muted (step S1506: Yes), it is unmuted (step S1507), and if it is not muted (step S1506: No), nothing is done. Then, the process returns to step S1501. By doing so, the driver can easily recognize that the simulated sound is automatically generated.

Further, it is preferable to generate a simulated sound by touching the horn button. Depending on the generation of the simulated sound, it is possible to call the attention of a pedestrian or the like by pressing the horn button only when the attention cannot be drawn by approaching or passing the vehicle. By doing so, it is possible to notify the approach / passage of the vehicle without causing discomfort or stress to pedestrians or the like by sounding the horn (horn).

(Contents of instruction promotion notice) Next, the content notified by the instruction promotion notification unit 108 shown in FIG. 1 will be described. 16 to 19 are explanatory views showing an example of the content notified by the instruction promotion notification unit 108. The display screen 1601 shown in FIG. 16 notifies that the pseudo sound generation switch is turned on when a pedestrian is present. Further, the display screen 1701 shown in FIG. 17 notifies that the pseudo sound generation switch is turned on when entering the danger zone.

Further, the display screen 1801 shown in FIG. 18 notifies that the pseudo sound generation switch is turned off when the danger zone is exited. Further, the display screen 1901 shown in FIG. 19 is such that the pseudo sound generation switch is turned off when the simulated sound is continuously generated for a certain period of time, or when the simulated sound is continuously generated for a predetermined distance. It is to announce to. In both cases, the display screen 1601,1701,1801,1901 is erased by pressing the "Confirm" button 1602,1702,1802,1902.

Although the instruction promotion notification is performed using the display 414, the notification is not limited to this, and may be, for example, a notification based on the emission color of the lamp or the timing of blinking, or a notification by voice.

(Contents of pseudo sound generation notification) Next, the content notified by the simulated sound generation notification unit 107 shown in FIG. 1 will be described. FIG. 20 is an explanatory diagram showing an example of the content notified by the simulated sound generation notification unit 107. The display screen 2001 shown in FIG. 20 confirms with the driver or the like whether or not to register this as a danger zone thereafter when the pseudo sound generation switch is operated. While registration is done by pressing the "Yes" button 2002, it is not registered as a danger zone by pressing the "No" button 2003.

Although the pseudo sound generation notification is performed using the display 414, the notification is not limited to this, and may be, for example, a notification based on the emission color of the lamp or the timing of blinking, or a notification by voice.

(Contents of the input screen for location information) Next, the contents of the generation location information input screen input by the generation location information input unit 106 will be described. 21 to 23 are explanatory views showing an example of the generation location information input screen input by the generation location information input unit 106.

On the simulated sound generation location input screen 2101 of FIG. 21, the map image 2102, more specifically, for example, the display image of the car navigation is displayed, and the location where the simulated sound is to be generated is specified by the cursor on the displayed map image 2102. By pressing the "OK" button 2103, the longitude / latitude information of the specified location is extracted and stored in the generation location information storage unit 103 as the pseudo sound generation location information.

In addition, on the simulated sound generation location input screen 2201 in FIG. 22, a specific location provided with longitude / latitude information by the selection field 2202, specifically, for example, " 4-chome intersection" and " street entrance south" By displaying a list, selecting a desired location from the list, and pressing the "OK" button 2203, the longitude / latitude information of the location is stored in the generation location information storage unit 103 as pseudo sound generation location information.

In addition, on the pseudo-sound generation location input screen 2301 in FIG. 23, a list of public places that do not have longitude / latitude information, specifically, for example, "school zone" and "intersection", is displayed by the selection field 2302. By selecting a desired location from the above and pressing the "OK" button 2303, the longitude / latitude information of all the corresponding locations is extracted and stored in the generation location information storage unit 103 as the pseudo sound generation location information.

When the "Cancel" button 2104, 2204, 2304 is pressed in FIGS. 21 to 23, the process is stopped and the input screens 2101, 2201, 2301 are deleted.

As described above, according to this embodiment, the simulated sound information storage unit 101 stores information on the simulated sound, and the out-of-vehicle generation unit 102 is based on the information stored by the simulated sound information storage unit 101. Then, the simulated sound is generated outside the vehicle, the generation location information storage unit 103 stores the information regarding the location where the simulated sound is generated, and the current position information acquisition unit 104 acquires the information regarding the current position of the vehicle. The control unit 105 controls the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 based on the information stored by the generation location information storage unit 103 and the information acquired by the current position information acquisition unit 104. , It is possible to generate a simulated sound (pseudo running sound) of the vehicle when the vehicle travels in a predetermined place. As a result, it is possible to unknowingly notify pedestrians and the like around the vehicle of the approach and passage of the vehicle and call attention to them. Therefore, while taking advantage of low noise, it is possible to eliminate the harmful effects of low noise and ensure safe passage for pedestrians and the like.

Further, according to this embodiment, the generation location information input unit 106 accepts the input of information regarding the location where the pseudo sound is generated, and the generation location information storage unit 103 receives the input by the generation location information input unit 106. Since the stored information is stored, a simulated sound can be generated at a desired place such as a driver.

Further, according to this embodiment, in order to detect a predetermined situation when the detection unit 113 is traveling and to control the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102 by the control unit 105. , It is possible to unknowingly notify the approach and passage of the vehicle based on a predetermined situation when the vehicle is traveling and call attention.

Further, according to this embodiment, the instruction input unit 115 receives an instruction to start / end the pseudo sound generation, and the detection information storage unit 116 gives an instruction to start / end the pseudo sound generation by the instruction input unit 115. When this is done, information about the result detected by the detection unit 113 is stored, and the control unit 104 generates the signal outside the vehicle based on the information stored by the detection information storage unit 116 and the result detected by the detection unit 113. Since the output of the simulated sound generation instruction signal to the unit 102 is controlled, the situation in which the simulated sound was generated in the past can be memorized, and the simulated sound can be automatically generated when the same situation occurs.

Here, in order to generate the simulated sound more appropriately, the detection unit 113 may detect a situation outside the vehicle, for example. The conditions outside the vehicle may include, for example, at least one of weather conditions, road conditions, pedestrian conditions and other vehicle conditions, including bicycles. Further, the detection unit 113 may detect the position where the vehicle is traveling. Further, the detection unit 113 may detect the state of the driver of the vehicle.

Further, the detection unit 113 may detect the operation state of the vehicle. At that time, the control unit 105 may change the direction in which the pseudo sound is generated by the out-of-vehicle generation unit 102 based on the operation state of the vehicle detected by the detection unit 113. By doing so, the simulated sound can be generated more appropriately.

Further, the control unit 105 may control the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit based on at least one of the calendar information and the time information. More specifically, for example, even in the same place, it is possible to generate or not generate a simulated sound on weekdays and Sundays and holidays, and on mornings and nights.

Further, the simulated sound information storage unit 101 stores information related to a plurality of types of simulated sounds (specifically, for example, a MIDI sound source), and the control unit 105 selects at least one of the plurality of types of simulated sounds. A pseudo sound selection signal may be output. As a result, the optimum simulated sound can be generated according to the situation, and the occurrence of adverse effects on the surroundings can be prevented as much as possible.

Further, the control unit 105 controls the output of the pseudo sound generation instruction signal to the external generation unit 102 based on the result detected by the detection unit 113, and the audio device 111 (413) provided in the vehicle. The output of the volume control instruction signal may be controlled. As a result, even when a simulated sound is automatically generated, it is possible to notify the driver or the like to that effect.

Further, according to this embodiment, the pseudo sound generation notification unit 107 notifies that the pseudo sound is being generated, and the control unit 105 outputs the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102. When this is done, the output of the simulated sound generation notification signal to the simulated sound generation notification unit 107 is controlled. Therefore, even if the simulated sound is automatically generated, the driver or the like is notified to that effect. Can be done.

Further, according to this embodiment, the instruction promotion notification unit 108 gives a notification prompting the generation instruction of the pseudo sound, and the control unit 105 controls the output of the pseudo sound generation instruction signal to the out-of-vehicle generation unit 102. Instead, since the output of the instruction promotion notification instruction signal to the instruction promotion notification unit 108 is controlled, it is possible to prevent the artificial sound from being generated against the will of the driver or the like.

Further, the sound collecting unit 109 collects the ambient sound outside the vehicle including the simulated sound generated outside the vehicle by the outside generating unit 102, and the in-vehicle generating unit 110 collects the sound by the sound collecting unit 109. Since the simulated sound is generated inside the vehicle, the simulated sound output outside the vehicle, the noise outside the vehicle, and the like can be reliably recognized even when the window is closed, for example.

The simulated sound generation method in the present embodiment may be a program that can be read by a computer (for example, a microcomputer) prepared in advance, or the program may be read by a computer such as a personal computer or a workstation including a server. It is realized by executing. This program is executed by being recorded on a computer-readable recording medium such as HD, FD, CD-ROM, MO, or DVD, and read from the recording medium by the computer. Further, this program may be a transmission medium that can be distributed via a network such as the Internet.

<figref num="1">It is a block diagram which shows an example of the functional structure of the simulated sound generator which concerns on embodiment of this invention.</figref><figref num="2">It is a flowchart which shows an example of the procedure of the process of the pseudo sound generation method which concerns on embodiment of this invention.</figref><figref num="3">It is a flowchart which shows another example of the procedure of the process of the pseudo sound generation method which concerns on embodiment of this invention.</figref><figref num="4">FIG. 5 is a block diagram showing a hardware configuration of a simulated sound generator according to an embodiment of the present invention.</figref><figref num="5">It is explanatory drawing which shows the structure of the detection part 113 of the simulated sound generator which concerns on embodiment of this invention.</figref><figref num="6">It is explanatory drawing which shows an example of the information stored in the hard disk (HD) 405 which functions as the detection information storage part 116.</figref><figref num="7">It is explanatory drawing which shows an example of the judgment table stored in HD405 which functions as the occurrence place information storage part 103.</figref><figref num="8">It is explanatory drawing which shows another example of the judgment table stored in HD405 which functions as the detection information storage part 116.</figref><figref num="9">It is explanatory drawing which shows another example of the judgment table stored in HD405 which functions as the detection information storage part 116.</figref><figref num="10">It is explanatory drawing which shows another example of the judgment table stored in HD405 which functions as the detection information storage part 116.</figref><figref num="11">It is explanatory drawing which shows another example of the judgment table stored in HD405 which functions as the detection information storage part 116.</figref><figref num="12">It is a flowchart which shows an example of the procedure of the determination process of the control unit 105.</figref><figref num="13">It is a flowchart which shows another example of the procedure of the determination process of the control unit 105.</figref><figref num="14">It is a flowchart which shows another example of the procedure of the determination process of the control unit 105.</figref><figref num="15">It is a flowchart which shows another example of the procedure of the determination process of the control unit 105.</figref><figref num="16">It is explanatory drawing which shows an example of the content which is announced by instruction promotion notification part 108.</figref><figref num="17">It is explanatory drawing which shows another example of the content which is announced by instruction promotion announcement part 108.</figref><figref num="18">It is explanatory drawing which shows another example of the content which is announced by instruction promotion announcement part 108.</figref><figref num="19">It is explanatory drawing which shows another example of the content which is announced by instruction promotion announcement part 108.</figref><figref num="20">It is explanatory drawing which shows an example of the content which is announced by the simulated sound generation notification unit 107.</figref><figref num="21">It is explanatory drawing which shows an example of the input screen of the occurrence place information input by the occurrence place information input unit 106.</figref><figref num="22">It is explanatory drawing which shows another example of the input screen of the occurrence place information input by the occurrence place information input unit 106.</figref><figref num="23">It is explanatory drawing which shows another example of the input screen of the occurrence place information input by the occurrence place information input unit 106.</figref>

Code description

101 Pseudo-sound information storage 102 Out-of-vehicle generator 103 Occurrence location information storage unit 104 Current location information acquisition department 105 Control unit 106 Occurrence location information input section 107 Pseudo-sound generation notification section 108 Instruction Promotion Notification Department 109 Sound collector 110 In-vehicle generator 111 Audio equipment 113 Detector 115 Instruction input section 116 Detection information storage unit 410 GPS 411 switches (group) 412 Microphone (microphone) 414 display 415 lamp 417,418 amplifier 419 Outside speaker 420 In-car speaker 2101,2201,2301 Pseudo sound generation location input screen