Display device of measured position

[Detailed Description of the Invention]

(a) Field of the Invention This invention relates to the positioning position read out device which indicates the position of the self-opportunities (a vessel, an airplane, vehicles, etc.) for which it asked with electric navigation or independence navigation by superposition into maps, such as a topographical map and a chart. (bl prior art) As a method of measuring the position of self-opportunities (a vessel, an airplane, vehicles, etc.), the self-contained navigation system by the electric navigation device using a positioning satellite, a loran, omega, etc., INS (inertial navigation system), a gyroscope, a To turn on n log, etc. is used. the self-opportunity position for which it asked with these devices - display -- it is considered as the method of carrying out, and the positioning position read out device which was made to indicate the positioning position by superposition is used on maps, such as a topographical map and a chart. (C) Although the position of a receiving station is measured by an electric navigation device's receiving the electric wave transmitted from a plurality of transmitting stations, such as a positioning satellite, in the general issue which an invention tends to solve, and asking it for the distance and the distance difference of a transmitting station and a receiving station, a positioning error arises with various elements. When based on a self-contained navigation system, a positioning error accumulates with the time progress from a positioning start. However, in the conventional positioning position read out device, when the positioned self-opportunity position was displayed on a map, even if there was moreover scale change of a map, the mark which shows the self-opportunity position on a map was eternal [ it was / that a single mark is always only displayed and / and ]. Therefore, when a self-opportunity position mark is displayed on the map of a small scale (the denominator of a scale rate is large), Since it is large enough as compared with an error ingredient, a problem has few sizes of the mark on a map, but in displaying a self-opportunity position mark, for example on the map of large scales, such as 150.000, a gap arises in a mark display position and a true position according to a positioning error. In the case where the airplane which uses the device as a navigational aid device, for example flies a mountain slope etc., this poses a problem especially on safety. The object of this invention cancels such a conventional problem, and there is in providing the positioning position read out device which is on a display and enabled it to grasp a self-opportunity position easily also including a positioning error ingredient. (d+ a means for solving problem) In the positioning position read out device in which the positioning position read out device concerning the claim (1) of this invention was provided with the positioning means which asks for the position of a self-opportunity with electric navigation, and a locative-calls means to display with a map the positioning position where it asked, In the positioning position read out device provided with an error data setting means to set a fixed error as a memory, the positioning means which asks for the range of a self-opportunity with the error example (2) independence navigation on [ the set-up error data to ] the above-mentioned map, and the positioning locative-calls means searched for, the rate of a cumulative error is set as a memory. A positioning position read out device concerning the claim (2) of this invention, In the positioning position read out device provided with the positioning means which asks for the position of a self-opportunity with independence navigation, and a locative-calls means to display the called-for positioning position with a map, The positioning means which asks for the range of a self-opportunity with the error example (2) independence navigation on the above-mentioned map from the lapsed time from the rate of a cumulative error set to an error data setting means to set the rate of a cumulative error as a memory, and a positioning start, In the positioning position read out device provided with the positioning locative-calls means searched for, the rate of a cumulative error is set as a memory. +8 -- OPERATION In the positioning position read out device concerning Claim+1 of this invention, an error data setting means sets a fixed error as a memory. According to the positioning method of electric navigation, become settled, or this fixed error is a positioning error peculiar to a device. In an error span mark display, the rate of a cumulative error gives the display data of an error span mark which expresses the range of a self-opportunity with the error example (2) independence navigation on a map from the set-up error data to a locative-calls means. For example, the set-up error data is changed into the dimension of distance, it responds to the scale of a map, this is changed into the length on a map, and display data is created by considering the circle which makes the length a radius as an error span mark. Thus, the displayed example is shown in Drawing 1 (A). In the figure, circular mark Ma in a figure is an error span mark, and it is the central point (Xo). Yo) is a positioning position and the length corresponding to a positioning error in radius r of a circle, and, as for cylindrical mark Mb to which this circular inner side expresses the error span and which accompanies circular mark Ma in addition, the direction of movement of the self-opportunity is shown. In the positioning position read out device concerning the claim (2) of this invention, an error data setting means is Me about the rate of a cumulative error. The Maury / setup of is done. This rate of a cumulative error is a positioning error per [ by independence navigation ] unit time. In an error span mark display, the rate of a cumulative error gives the display data of an error span mark which expresses the range of a self-opportunity with the error example (2) independence navigation on a map to a locative-calls means from the lapsed time from the set-up rate of a cumulative error, and a positioning start. That is, a positioning error squares the lapsed time from a positioning start to the rate of a cumulative error, and is searched for by To. Based on the positioning error and the scale of a map for which it asked, the circular error span mark which makes a positioning error a radius is displayed. Thus, in the positioning method by independence navigation, even if the scale of a map is the same, the size of an error span mark changes with the time progress from a positioning start. For example, if the state which showed in Drawing 1 (A) is in the display state at the positioning start time, as shown in Drawing 1 (B) after a certain time progress after that, a positioning error will be accumulated and big error span mark Ma' of radius r' will be displayed. (f) EXAMPLE The composition of the positioning position read out device which is an example of this invention is shown in Drawing 2, and that processing procedure is shown in Drawings 3 and 4. In Drawing 2, CPUI generalizes the whole processing. The program which should perform CPUI is beforehand written in ROM2. External memory 4 which uses RAM3 as a working area etc. of the various operation processings mentioned below consists of a magnetic disk, an optical disk unit, etc., and has recorded map data beforehand. Controller 5 is a control circuit which performs reading control of data to external memory 4, etc. VRAM6 is a memory for a display which memorizes the data which should be displayed corresponding to a display screen. Electric navigation devices 7 are electric navigation, such as a GPS receiver, for example. Self-contained navigation system 9 consists of INS(s) etc., for example, and interface circuitry 10 interfaces between this device. As for keyboard 1, in a ten key, other various function keys, etc., interface circuitry and 12 interface reading control of a key, etc. CRT13 is a display which displays a self-opportunity position by an error span mark with a map, and display control mouth Ft?14 performs display control. Timer 15 is a circuit which clocks the lapsed time from positioning jSn Beginning, etc., and interface circuitry 16 interfaces read-out, reset, etc. of lapsed time. Electric navigation device 7 and self-contained navigation system 9 apply interruption to cPUl while positioning a self-opportunity position to predetermined timing. By interruption processing, CPUI reads the present positioning data and performs display control of an error span mark, etc. In the usual processing without those of interruption, processing according to the human power of keyboard 1 is performed. Drawing 3 is twisted from that of interruption and usually shows the procedure of processing. If (nl) which reads the contents of operation from a keyboard first, and a ten key are operated, the number processing of Place will be performed (n2-n3). if a fixed error key is operated, the data by which the number of Place was carried out will be memorized as a fixed error (n 4-*n 5) -- if the rate key of * cumulative error is operated, the data by which the number of Place was carried out will be memorized as a rate of a cumulative error (n6-n7). A timer will be reset if a start key is operated (n8-n 9). This start key is operated at the time of an independence navigation start, and, thereby, a timer clocks the lapsed time from a positioning start. If a scale key is operated, the scale (display scale rate) of a map will be changed according to the key operation (nlO-nil). If interruption starts from electric navigation device 7 shown in Drawing 2, or self-contained navigation system 9, interruption processing shown in Drawing 4 will be performed. First, positioning data is read from the electric navigation device to which interruption was applied, or a self-contained navigation system (n20). From an electric navigation device, to a Bought case, interruption resets a timer, while amending the positioning data of a self-contained navigation system with the positioning data of an electric navigation device. A synthetic positioning error is computed continuously (n21). the fixed error to which this was set -- deltaD -- "-- setting the rate of a cumulative error to deltaDt -- a timer a of value -- T -- also carrying out -- a case is asked as delta Df+T-delta Dt. That is, the cumulative error of independence navigation is added to fixation and an error, and it is considered as a positioning error. The radius of the error span mark on display memory is computed by continuing and being based on the scale and combined error of a map (n22). Then, it judges whether a self-opportunity position can be displayed in the prescribed range in a display screen, and if impossible, a map display rectangle will newly be computed (n23-n 24). In n25, a map is displayed by writing the map data which should be displayed based on the scale of a map, and the reference position of a map in display memory. Then, the move direction of a self-opportunity is judged from a relation with the past positioning data, or the measuring result of a self-contained navigation system (n26). It is Drawing 1 by being old to the field equivalent to the self-opportunity position of - display memory in an error span mark and the cylindrical mark which shows the move direction of a self-opportunity (A). As shown in (B), the error span mark etc. are indicated by superposition on a map (n27). Although the example shown above performed data processing by the program manipulation which used the microprocessor etc., it is also possible to perform data processing by an individual circuit so that it may state below. Drawing 5 is a block diagram of the positioning position read out device concerning the 2nd example of this invention. In the figure, Katashi fixed error register 20 and rate register 21 of a cumulative error memorize the fixed error and the rate of a cumulative error which were set up, respectively. Timer 22 clocks the lapsed time after Risent release is carried out. 23 is a multiplier which multiplies the value of rate register 21 of a cumulative error, and the value of timer 22, and cumulative error register 24 memorizes the multiplication result. 25 is an adding machine adding the value of fixed error register 20, and the value of cumulative error register 24, and combined error register 26 memorizes the addition result. Map scale register 27 memorizes the scale data of a map which should be displayed. Mark radius determination circuit 28 is based on the value of map scale register 27, and the value of combined error register 26, and searches for the radius of the error span mark on display memory. Positioning device 29 consists of an electric navigation device and a self-contained navigation system, and does position register 30 and \ output of positioning position data. Map reference position register 31 memorizes the reference position (for example, coordinates of a middle-of-the-screen part) of the map data which should be written in display memory. Mark center determination circuit 32 determines the center position of the error span mark in display memory based on the reference position and positioning data of a map. Mark drawing circuit 33 writes in the display data of display memory 34 and \ error span mark based on the center position and radius of an error span mark. It can indicate by superposition on a map as a circle which included the error ingredient for the self-opportunity position as mentioned above. Although error data was set up by key human power in the example, it may be made to set up automatically according to the positioning conditions by a navigation equipment. (The effect of g1 invention) According to this invention, since it was made to display by the mark showing an error span when displaying the position of a self-opportunity into maps, such as a topographical map and a chart, the self-opportunity position on a map can be displayed exactly, and it becomes possible to grasp a self-opportunity position easily with an error element.

[Brief Description of the Drawings]

The block diagram and Drawings 3 and 4 of the positioning position read out device which requires for the 1st example the figure where Drawing 1 expresses the example of a display of the positioning position read out device of this invention, and Drawing 2 are a flow chart showing that processing procedure. Drawing 5 is a block diagram of the positioning position read out device concerning the 2nd example. Ma= mini error span Maher The 19j person FURUNO ELECTRIC CO., LTD.