Method and system to obtain the traffic situation through fixed data-acquisition device
Abstract
THE INVENTION REFERS TO A SYSTEM FOR THE REALIZATION OF TELEMATIC TRAFFIC SERVICES WITH A CENTRAL UNIT THAT IS EQUIPPED WITH A DATA PROCESSING FACILITY AND THAT COLLECTS TRAFFIC INFORMATION, WAREHOUSES AND MAKES THEM AVAILABLE THROUGH A COMMUNICATION CHANNEL. THESE RESULTS ARE CALCULATED BY THE CENTRAL THROUGH A SELF-LEARNING SYSTEM IN VIEW OF THE MEASUREMENT DATA AND NOTICE OF A DETECTOR ON THE SITUATION OF TRAFFIC.

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Projected expiry passed 20 March 2017, 9.5 years ago.
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15 claims: 1 independent, 14 dependent
- 1ES 2 153 159 T3 REIVINDICACIONES 1. Procedimiento para el registro de situación de trafico por medio de instalaciones de registro de datos (detectores) instaladas estacionarios en puntos de instalación a lo largo de una red de vías de circulacioón, que determinan los datos sobre el estado del traófico en el punto de instalacióon de los correspondientes detectores seguón un comportamiento de medicióon ajustado y transmiten las informaciones derivadas de esto, seguón un comportamiento de informacióon ajustado, a una central para el registro de la situacióon de traófico para su posterior evaluacioón, caracterizado porque - la evaluacioón de la central consiste en - derivar informaciones de tróafico actuales y/o - informaciones de traófico históoricas y/o - establecer pronóosticos de traófico y/o - identificar sucesos que caracterizan el estado del tróafico, - porque la central transmite a los detectores al menos una parte de los resultados de la evaluacióon y - porque el correspondiente detector, con la ayuda de estos resultados transmitidos,ajusta su comportamiento de medicióon y/o su comportamiento de informacioón en el sentido de un sistema adaptivo.
- 2Procedimiento seguón la reivindicacioón 1, caracterizado porque los resultados de la evaluacioón se seleccionan referidos a los lugares de ubicacioón de un grupo de detectores.
- 3Procedimiento seguón la reivindicacioón 1, caracterizado porque los resultados de la evaluacioón se seleccionan referidos al lugar de ubicacióon de detectores individuales.
- 4Procedimiento seguón la reivindicacióon 2 o 3, caracterizado porque la seleccióon se realiza en la central.
- 5Procedimiento seguón una de las reivindicaciones 2 y 3, caracterizado porque la seleccióon se realiza por un filtrado de los resultados transmitidos en el detector correspondiente.
- 6Procedimiento seguón una de las reivindicaciones 1 a 5, caracterizado porque en la central se deriva de tiempo en tiempo una curva de movimiento vigente actual para magnitudes de medicioón relevantes del tróafico y se transmite a un detector, y porque el correspondiente detector solo informa a la central de desviaciones prefijadas de la curva de movimiento vigente actual.
- 7Procedimiento seguón la reivindicacioón 6, caracterizado porque la transmisióon de la curva de movimiento se realiza en forma de puntos de un curso de funcióon.
- 8Procedimiento seguón la reivindicacioón 6, caracterizado porque en el detector estóa almacenada una serie de curvas de movimiento normalizadas y la central especifica al detector una curva de movimiento por la transmisioón de un cóodigo, el cual estóa asignado siempre claramente a una de las curvas de movimiento almacenadas en memoria.
- 9Procedimiento seguón una de las reivindicaciones 6 a 8, caracterizado porque las curvas de movimiento se determinan en funcióon de condiciones meteorolóogicas clasificadas y/o de sucesos relevantes del tróafico.
- 10Procedimiento seguón una de las reivindicaciones 1 a 9, caracterizado porque un estado de traófico pronosticado para el correspondiente punto de instalacioón se transmite al detector correspondiente.
- 11Procedimiento seguón una de las reivindicaciones 1 a 10, caracterizado porque desde la central se transmiten al detector correspondiente, para su comprobacioón, supuestos sobre el estado de tróafico actual en un punto de instalacióon y desde el detector se reenvóa a la central informacióon de las desviaciones registradas.
- 12Procedimiento seguón una de las reivindicaciones 1 a 11, caracterizado porque la central registra y transmite al correspondiente detector propiedades características que señalan un caso de perturbacioón aguas arriba de un punto de instalacióon de un detector o un atasco inminente en el punto de instalacióon (indicadores tempranos).
- 13Sistema para la realizacioón del procedimiento seguón la reivindicacioón 1, - con una central (1) que estaó equipada con una instalacioón electróonica de procesamiento de datos (2) para el registro de situacióon de tróafico y una unidad de comunicacióon (3), - con una serie de detectores (8) instalados a lo largo de una red de vóas de comunicacióon, cada uno de los cuales presenta - un dispositivo de sensores (6) para el registro de valores de medicióon, - una unidad electroónica de procesamiento de datos (5), - una unidad de comunicacioón (4) y - una alimentacioón de corriente elóectrica (7), - y con un canal de comunicacioón (9) para la transmisioón de informacioón desde los detectores (8) a la central (1), caracterizado - porque el canal de comunicacioón (9) para la transmisióon de informacióon entre los detectores (8) y la central (1) es un canal de comunicacioón bidireccional y - porque el dispositivo electroónico de procesamiento de datos (5) de un detector (8) estóa siempre programado de tal manera que, con ayuda de resultados que han sido transmitidos por la central (1) en el marco del registro de situaciones de tróafico, se ajustan, en el sentido de un sistema autoadaptivo, el comportamiento de medicioón y/o el comportamiento de informacioón del detector (8). ES 2 153 159 T3
- 14Sistema según la reivindicación 13, caracterizado porque en el dispositivo de procesamiento de datos (5) de los detectores (8) estóan almacenadas curvas de movimiento normalizadas para magnitudes de medicioón relevantes del tróafico, porque las curvas de movimiento pueden ser identificadas siempre en el detector (8) y porque el dispositivo de procesamiento de por un cóodigo transmitido desde la central datos (5) estaó establecido como comparador para reconocimiento de desviaciones significativas de los valores actuales de una magnitud de medicioón respecto de una curva de movimiento especificada por la central (1).
- 15Sistema seguón una de las reivindicaciones 13 y 14, caracterizado porque los detectores (8) presentan un correspondiente filtro para seleccioón de los resultados que son transmitidos por la central (1) y que estóan destinados solo a un detector (8) o a un grupo de detectores. NOTA INFORMATIVA:Conforme a la reserva del art. 167.2 del Convenio de Patentes Europeas (CPE) y a la Disposición Transitoria del RD 2424/1986, de 10 de octubre, relativo a la aplicacion del Convenio de Patente Europea, las patentes europeas que designen a España y solicitadas antes del 7-10-1992, no producirán ningún efecto en Espana en la medida en que confieran proteccián a productos quámicos y farmaceuticos como tales. Esta informacioán no prejuzga que la patente estáeo no incluáda en la mencionada reserva.
Independent claims15
17 paragraphs in 2 sections, as filed
IS 2 153 159 T3
DESCRIPTION
Procedure and system for recording the traffic situation by means of a stationary data recording facility
The invention refers to a procedure for recording traffic situation by means of data recording devices (detectors) installed stationary in places of installation along a network of roads, To determine the data through the traffic state at the place of installation of the corresponding detector, they will follow an adjusted measurement behavior and transmit for subsequent evaluation the information derived from this, they will follow an adjusted message procedure, to a central for recording the situation. of traffic.
From document EP 0 029 201 B1 an interactive dynamic route guidance system is known in which specially equipped vehicles communicate with a traffic computer. The bilateral communication is carried out in this through beacons that are equipped with an infrared emitting / receiving device and installed in all the important crossings of the network of tracks. The vehicles, each also equipped with a corresponding transmitter / receiver device, receive from the traffic computer, by means of these beacons, among others, current information on the temporarily shorter travel routes at a desired time. The main sources of information for the traffic computer are "floating" test vehicles, movable together in the traffic flow. These transmit to the traffic computer in particular their travel times between important traffic lane crossings as well as waiting times at light signal installations. This information is then used by the traffic computer for route guidance and traffic management, for example, the corresponding traffic driving information being transmitted to the guáa vehicles and issued through a control device to a display on the vehicle.
From the generic document US 5 317 311 a system for registering the traffic situation with fixed installed detectors is known. The detectors, the sensing devices of which are incorporated, for example, in bridge constructions on the lanes of a motorway, measure the average speed of the passing vehicles and determine the number of vehicles that pass in a unit of time. This information is transmitted by means of a data transmission channel (eg, telephonic conduction) to a central to register the traffic situation. In this system, the average speeds indicated by the detectors are transmitted through appropriate transmitting devices of the central to the vehicles that are equipped with appropriate receiving devices, and these data are graphically displayed on a screen with the locations of the respective detectors. corresponding to a sector of the map. In this way, traffic participants can be informed in an up-to-date way about problem areas of the road network. The measurement behavior of the detectors is normally regulated in such a way that a continuous exploration of the traffic occurrence takes place. Unlike the traffic situation register published in document EP 0 029 201 in the generic system, the relevant data for the traffic situation register are not determined with test vehicles and are transmitted to registration stations (beacons), which in turn they proceed to a data transmission to the central, but here a data transmission takes place through the fixed installed sensor devices of the detectors themselves. But the registered data from the detectors is not transmitted to the traffic situation registration center without interruption. The practical implementation of the system described in document US 5 317 311 rather provides for a limited information behavior of the detectors. This consists in that information is transmitted to the traffic situation registration center only when the average speed of the passing vehicles, determined by the detectors over a certain period of time, exceeds a predetermined threshold value. Such a threshold value can be set, for example, at about 50 km / h. With this, the load on the communication channel for data transmission can be significantly reduced. This, in any case, implies that this system can only provide assessable information on phases of the traffic event in which there is a very high traffic load, that is, a situation of traffic jam or a situation similar to that of traffic jam. If there is an average traffic load or totally free traffic situations, it cannot be decided by restricting the information behavior of the detectors with the help of the recorded data. With the known system this will only be possible if the limitation of the information behavior is eliminated, which will require a correspondingly considerable increase in the communication costs between the detectors and the traffic situation registration center.
For this reason, the objective of the present invention is to perfect a procedure of this type in such a way that with a communication cost as low as possible between the fixed installed detectors and the traffic situation registration center, it is possible with a greater obtaining of data the complete observation of the flow of the traffic, that is to say, not only the restricted observation in congested situations. In addition, a system is offered to carry out this procedure.
This object is achieved with respect to the method with the characteristic attributes of claim 1. Advantageous further developments of this method emerge from dependent claims 2 to 12. A system according to the invention for the execution of this method has the attributes indicated in claim 13 and can furthermore be advantageously configured by means of the characteristic attributes of the subordinate claims 14 and 15.
The present invention provides that, unlike the system known from document US 5 317 311, not only average speeds can be easily transmitted to those involved in traffic.
ES 2 153 159 T3 co, but from the primary data detected by the detectors and possibly other information, traffic information is obtained by means of appropriate evaluations that are transmitted to the traffic interveners. These evaluations consist especially in the derivation of current and / or historical traffic information and / or in the establishment of traffic forecasts and / or in the identification of events that characterize the state of traffic. Unlike the traffic registration procedures known up to now by means of fixed installed detectors, it is foreseen that the invention will follow that the control unit transmits to the detectors at least part of the results of the evaluation carried out by it of the data collected by the detectors. . With the help of these transmitted results, each of the detectors participating in the data collection adjust their median behavior and / or their information behavior in the sense of an adaptive system, that is, new. This means that the detectors obtain knowledge of the traffic information directed from the control panel to the traffic participants who use the control panel service and that they enable them to configure their behavior when collecting data in an optimal way. This can affect the measurement behavior of the sensor device (e.g .: Should it actually be measured or can it be switched off for a while? What kind of averages should be set and over what periods of time?) Or the information behavior. (eg: dependence of the data transmission on the existence of certain events or specification of certain time distances between individual data transmissions) or both. By optimization in these circumstances, it must be understood that the control unit is fed at all times with the objective information necessary through the traffic events, the cost for data transmission being maintained, that is, in particular the load of the communication channels. , as small as possible.
In an advantageous refinement, the invention provides that the evaluation results transmitted from the control unit are selected relating to the place of installation of a group of detectors or even referring to the place of installation of individual detectors. This selection can advantageously be carried out in the central office. But in many cases it is shown as even more convenient to carry out the selection of the results by filtering in the detector in question. This can be done, for example, in the same way as in digital radio receivers (RDS / TMC = Radio Data System / Traffic Message Channel) known today. A particularly convenient form of execution of the invention includes that the control unit determines from time to time a current movement curve in force for the relevant measurement quantities of the traffic (e.g. the average speed of the participants in the traffic) and transmit it to the corresponding detector to which this movement curve must affect, to arrange for the corresponding detector to inform the control panel only of preset deviations of the corresponding measurement magnitudes recorded below, from the current current motion curve. In this way, a drastic reduction in the volume of information to be transmitted to the central can be achieved despite the temporary modification of the measured quantities recorded. This way of proceeding is based on the reflection that a data transmission from a detector to the control unit is totally superfluous, whereas the “model concepts” that the control unit has on the current traffic situation in the corresponding measurement points, do not they deviate significantly from reality. This can be monitored by the corresponding detector itself if it knows the concepts of the control unit, that is, the movement curve of the corresponding measurement quantities. For the transmission of a movement curve to a detector, a transmission of values can be provided in the form of a sequence of points of a function course. But it is much more convenient for typical developments of the traffic situation to determine relevant normalized traffic measurement magnitudes. For this reason, the invention provides in an improvement that a series of this type of normalized movement curves is stored in memory in the detectors and the control unit specifies to the detector a corresponding determined movement curve so that only a code is transmitted to which a clearly assigned of the stored motion curves. The different motion curves are advantageously determined as a function of classified atmospheric conditions (e.g. dry weather, rain, ice / snow patches) and / or relevant traffic events (e.g. establishment of construction sites. in vaas, celebration of large events such as fairs or football matches, etc.). Within the framework of the present invention it is also advantageously possible to transmit to the corresponding detector a predictable traffic state to the corresponding installation point to influence its measurement and / or information behavior. This procedure is similar to the variant of the procedure in which hydrographic curves are specified for the detectors, since in both cases future forecasts of the plant are taken as the basis. The procedure according to the invention also offers the possibility of transmitting assumptions about the current traffic state at an installation point from the control panel to the corresponding detector for verification, so that the detector, in the case of significant deviations from the real traffic state of these assumptions, you can send a corresponding data transmission to the central.
Solutions are known for the registration of traffic situations in which the data recording devices present an information behavior that is dependent on the local recognizable traffic state, that is to say, that falling below or exceeding certain threshold values can lead to place to individual information or also to periodic information to the central. But such solutions are not very sensitive for local peculiarities (e.g. in sectors of roads with slopes or curves), for characteristics of measured values that signal phenomena relevant for the user to one of 3
ES 2 153 159 T3 terminated distance of the data recording device (e.g. in traffic disturbances in the direction of travel of the measuring point), for external transient influences (e.g. determined by atmospheric conditions) and for differential conditions originated by different but symptomatically similar traffic situations (for example, traffic jams in road traffic jams and “moving overload traffic jams”). But the cited characteristics and influences become appreciable through characteristic movements and jumps of the working point in the fundamental diagram that represents the correspondence of speed, traffic flow (vehicles per hour) and traffic density (vehicles by lengths). section). By the procedure they follow the invention, it can be achieved that the data recording devices after passing through a learning phase “know what they have to pay attention to”, when they record data regarding the traffic situation and transmit them to the central . At the beginning of a sample phase, the total volume of recorded measurement data can be transmitted and evaluated at the control panel. The evaluations can be carried out by conventional statistical methods in support of the exercise of neural networks or also by Fuzzy methods. By receiving the results of this evaluation, the data recording devices are put in a position to recognize attributes in the occurrence of traffic that must lead to information to the central. In this sample process in which long-term experiences are stored, the data recording devices are at the same time receivers of historical traffic information. The knowledge of historical traffic information enables the detectors to recognize previous indicators relevant to the user, that is, events of importance for the determination of the traffic situation, and transmit them to the central. On the other hand, the knowledge of current traffic information can help to avoid the transmission of redundant medicine data. The information that is provided to a data recording device in this sense not only includes information on traffic disturbances or elimination of disturbances, which may also have its origin in sources outside the procedure following the invention and which are verified by the corresponding detector. , but also forecasts established from the central side, that take into consideration previously known external influences such as atmospheric conditions or planning of works, and that can be used by the affected detector to recognize deviations and their information to the plant. In this, deviations relevant to the user are both unexpectedly produced disturbances as well as sustained expected disturbances. Traffic information transmitted to a detector for monitoring does not necessarily have to be limited to the currently recorded and completed central state but may also comprise forecasts for a period of time that is short compared to a daily movement curve. It is especially convenient for the control panel to determine and transmit to the corresponding detector the characteristic properties that indicate a case of disturbance upstream from a detector installation point or an imminent traffic jam at the installation point (early indicators).
The invention is explained in more detail below with the help of the figures. They show:
Fig. 1 a schematic view of the functions of the procedure following the invention <sup>Y</sup> Fig. 2 a diagram of a system according to the invention for the registration of traffic situations.
In Fig. 1 the essential functions of the procedure according to the invention are represented for the two main components "Central registration of traffic situation" and "Data recording devices". The flow of information is symbolized by arrows. As the data recording devices are preferably fixed on bridges that are attached to the traffic lanes to be observed, these devices are designed in Fig. 1 as bridge units. Using a suitable sensor device, the measurement data (eg current speeds of passing vehicles) are determined and processed. This processing can consist, for example, in the determination of an arithmetic mean value for a certain period of time of observation. It is also conceivable to submit the recorded raw data to compression. The bridge unit can react to events relevant to the user (event detection) that have already been previously defined by the traffic situation registration center, which in Fig. 1 is defined as "Central", and adjusts the "Sensor knowledge" (measurement values of a certain period of time up to the present) with the "System knowledge" (current traffic information, traffic forecasts and historical information, approximately in the form of movement curves) and reports deviations that are of direct significance for estimating the current traffic situation or complement or correct the "Knowledge of the system". The exchange of information between the central for registering the traffic situation and the bridge units is carried out through the two “Communication” function blocks, following the conditions of a “Communication interface”. The function block arranged in the central, destined to the evaluation of the information supplied by the bridge units for the evaluation of data, has been designated as a "Traffic Model" in the representation.
In Fig. 2 an exemplary embodiment for a system for carrying out the procedure according to the invention is schematically represented. With the reference sign 1 there is designated a central for registering the traffic situation, which is equipped with an electronic data processing facility 2 as well as a communication unit 3. Through a communication channel 9, which, by title of example4
ES 2 153 159 T3 plo, it can be configured in the form of telephone lines, but preferably it is carried out through a mobile radiotelephone network, that is, wireless, the central 1 can enter into a communication connection through the communication unit. communication 3 with a series of detectors 8. The detectors 8 are installed on the side of the traffic lanes, for example, in bridge constructions on dual carriageways and are arranged for the collection of relevant data for the registration of traffic situations and the transmission to the central 1. In this the detectors 8, of which in Fig. two A total of three are represented, each of them equipped with a communication unit 4, an electronic data processing device 5 and a sensor device 6 for the recording of measurement values, as well as with an electrical power supply 7. The power supply unit 7 was preferably constituted as a battery-damped solar cell unit. Known sensors that are configured as active or passive infrared sensors or as microwave sensors are preferably used for the sensor device 6. The simultaneous application of sensors with different measurement principles inside the same detector 8 is especially advantageous. Through communication unit 4 the detectors 8 are in a position not only to transmit the relevant data for registering the traffic situation to the central1 through communication channel 9 but also, through communication channel 9, which It was configured as a bidirectional communication channel, they can receive at least a part of the results of the evaluation of data emitted by the central 1 through the communication channel 9. This puts the detectors 8, based on a suitable programming of the data processing device 5, in the situation of adjusting their measurement behavior and / or their information behavior in the sense of a self-adaptive system with the help of the received results. by control unit 1, that is, to modify its current setting if necessary. In a preferred further development of the invention, the corresponding standardized motion curves for the trophic-relevant measured variables and identifiable by means of a sensor 8 are stored in the not specially represented memory unit of the data processing unit 5 of the detectors 8. clear code. The control unit 1 is therefore in a position, with the aid of a transmitted code, to specify a certain movement curve for the corresponding detector 8 without having to transmit a corresponding multitude of individual values, which characterize the course of the line of motion. movement. The data processing device 5, based on this, is configured by its programming as a comparator because it can recognize significant deviations from the current values recorded of a measurement quantity of a movement curve predetermined by the control unit 1. With this, it is possible to optimize the information behavior of the corresponding detector 8 in such a way that data transmissions through the communication channel 9 to the central 1 are only carried out when such significant deviations have been detected. During the rest of the time, a data transmission of this type can be prevented. In a convenient configuration of the invention, the detectors 8 are provided with a corresponding filter for the selection of results that are transmitted by the control unit 1 and that are intended only for one detector or a group of detectors 8. With this it is basically possible to expressly affect by means of the control unit 1 the activities of an individual detector 8 or of a group of detectors 8 installed, for example, along a certain sector of the route of a highway. This means that the detectors 8 themselves, due to their observation of the traffic information issued by the control unit 1 for those involved in traffic, can recognize if the control unit 1 has an impression of the traffic situation coinciding with the current traffic situation. at the place of installation of the detectors 8. If this is not the case, then a data transmission to the control unit 1 can be immediately activated to trigger a suitable correction.
The procedure according to the invention and the system for its execution make it possible to drastically reduce the volume of data transmission processes necessary for the registration of realistic traffic situations with respect to the possibilities known up to now. This is possible due to the surprisingly simple measure by which the state of awareness of the control unit 1 can be continuously observed by the detectors 8, with at least part of the results of the traffic situation record transmitted by the control panel being received and adequately evaluated. 1 to the intervener in the trophic or also in selective individual information.
Contents2
2 sheets
Sheet 1 Sheet 2
7 members in 5 offices
Priority claims5
| Document | Office | Kind | Date |
|---|---|---|---|
| 19613015 | Germany | A | |
| 19613015 | Germany | A | |
| 19961013015 | Germany | – | |
| 19613015 | – | – | – |
| DE1996113015 | – | – | – |
Members7
| Document | Office | Kind | |
|---|---|---|---|
| EP0798684A1 | European Patent Office (EPO) | A1 | |
| US5889477A | United States of America | A | |
| EP0798684B1 | European Patent Office (EPO) | B1 | |
| AT198674T | Austria | T | |
| ATE198674T1 | Austria | T1 | |
| DE59702873D1 | Germany | D1 | |
| ES2153159T3This record | Spain | T3 |
1 legal event, as the office reported them to INPADOC
Events
| Event | Code | |
|---|---|---|
| Definitive protectionFG2A | FG2A |
Numbers
- Publication
- 2153159
- Publication, DOCDB
- 2153159
- Publication, EPODOC
- ES2153159T
- Application
- 97250086
- Application, DOCDB
- 97250086
- Application, EPODOC
- ES19970250086T
Titles2
- Spanish
- PROCEDIMIENTO Y SISTEMA PARA EL REGISTRO DE SITUACION DE TRAFICO POR MEDIO DE UNA INSTALACION ESTACIONARIA DE REGISTRO DE DATOS.
- English
- PROCEDURE AND SYSTEM FOR THE REGISTRATION OF TRAFFIC SITUATION THROUGH A STATIONARY DATA REGISTRATION FACILITY.
Classification
- CPC, 1
- G08G1/0104
- IPC, 1
- G08G1 01