EP0243635B1 - Strassenleitsystem - Google Patents

Strassenleitsystem Download PDF

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Publication number
EP0243635B1
EP0243635B1 EP19870103562 EP87103562A EP0243635B1 EP 0243635 B1 EP0243635 B1 EP 0243635B1 EP 19870103562 EP19870103562 EP 19870103562 EP 87103562 A EP87103562 A EP 87103562A EP 0243635 B1 EP0243635 B1 EP 0243635B1
Authority
EP
European Patent Office
Prior art keywords
data
level
vehicle
roadside
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19870103562
Other languages
English (en)
French (fr)
Other versions
EP0243635A2 (de
EP0243635A3 (en
Inventor
Yoshizo Osaka Works Of Shibano
Junichi Osaka Works Of Ikeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of EP0243635A2 publication Critical patent/EP0243635A2/de
Publication of EP0243635A3 publication Critical patent/EP0243635A3/en
Application granted granted Critical
Publication of EP0243635B1 publication Critical patent/EP0243635B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096783—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
    • G08G1/096827—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed onboard
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
    • G08G1/096861—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver where the immediate route instructions are output to the driver, e.g. arrow signs for next turn

Definitions

  • This invention relates generally to a roadside beacon system. More particularly, this invention relates to a roadside beacon system which is used to calibrate the position of a vehicle and to perform data transmission in a navigation system in which, after data on a departure point are inputted, vehicle speed data and direction data are inputted to enable the display of the present position of the vehicle.
  • a so-called “navigation system” for vehicles has been known in the art (see for example EP-A-0021060).
  • a small computer and a small display unit are installed on a vehicle.
  • a road map is read out of memory means such as a compact disk and displayed on the display unit.
  • the vehicle speed data outputted by a vehicle speed sensor and the direction data provided by a direction sensor are inputted, so that calculation of the position of the vehicle and determination of the traveling direction of the vehicle are performed at all times. According to the results of the calculation and the determination, the vehicle is marked on the road map displayed on the display unit.
  • the operator in the vehicle can visually detect the present position and the traveling direction of his vehicle. Therefore, he can reach his destination without losing his way.
  • the navigation system described above is disadvantageous in the following point.
  • the errors inherent in the vehicle speed sensor and the direction sensor are accumulated as the vehicle runs.
  • a predetermined value which is not always constant, being determined by the errors of the vehicle speed sensor and the direction sensor of each vehicle and by the environmental conditions of the positions where the sensors are installed
  • the position of the vehicle displayed on the display unit is greatly shifted from the true position. That is, the system becomes unreliable and the vehicle operator may lose his way.
  • roadside antennas are installed at intervals shorter than the distance with which the error accumulated exceeds the above-described predetermined value.
  • the roadside antennas are used to transmit signals including position data and road direction data to predetermined relatively small areas, respectively.
  • the signals thus transmitted are received through the antenna installed on a vehicle so that the position and the traveling direction of the vehicle are calibrated with a computer.
  • the error accumulated is smaller than the predetermined value so that the position of the vehicle can be displayed according to the correct position data and the accurate direction data at all times.
  • roadside antennas considerably high in directivity are used to transmit the aforementioned signals including position data and road direction data at all times.
  • the vehicles receive the signals only when passing through the areas converted by the signals and the calibration is carried out according to the signals thus received. Therefore, if the area covered by the signal thus transmitted through each roadside antenna is increased, then the signal receiving position of the vehicle with respect to the roadside antenna is greatly shifted. As a result, the position and the traveling direction of the vehicle cannot be effectively calibrated.
  • the roadside beacon system is provided primarily for transmitting signals including position data and road direction data to vehicles having navigation systems. However, it is desirable to give the following functions to the system for more effective utilization:
  • an object of this invention is to provide a roadside beacon system in which a variety of function can be readily performed and calibration of a vehicle position can be achieved with high accuracy.
  • a navigator device is installed on a vehicle and is adapted to receive signals transmitted through each of several roadside antennas to calibrate and display vehicle position data.
  • the navigator device includes data receiving means for receiving a transmitted signal when the level of the transmitted signal is higher than a relatively low level.
  • Position determining means receive a transmitted signal when the level of the transmitted signal is higher than a relatively high level in order to output a position determination signal.
  • Calibrating means calibrates position data based on data representing positions of antennas, for instance, which has been stored in navigator devices and direction data according to the position determination signal and data received.
  • the relatively low level should be set to a value with which the signals transmitted through the roadside antennas can be received without being affected by noise or the like.
  • the relatively high level should be set to a value which is close to the peak value in level of a signal received by the navigator device when the vehicle confronts the roadside antenna.
  • a variety of data including a variety of data are transmitted to the vehicles through the roadside antennas installed along roads at predetermined positions.
  • the signal whose level is higher than the relatively low level can be received by the data receiving means and the signal whose level is higher than the relatively high level can be received by the position determining means thus providing the position determination signal.
  • the calibrating means receiving the data received by the data receiving means and the position determination signal outputted by the position determining means, calibrates the position data and the direction data. Then, navigation of the vehicle is continued by using the output signals of a vehicle speed sensor and a direction sensor.
  • the relatively low level is set to the value with which the signals transmitted through the roadside antennas can be received without being affected by noise or the like. Then, the navigation system on the vehicle can receive signals including data necessary for additional functions as well as the position data and the road direction data which are absolutely required for the original position finding function.
  • the relatively high level is set to the value which is close to the peak level value of the signal received by the navigator device when the vehicle confronts anyone of the roadside antennas.
  • the position data and the road direction data can be calibrated when the vehicle has approached the roadside antenna.
  • the data transmitted for a relatively long period of time which is determined by the relatively low level are applied to the communication data terminal, necessary communication data can be read with means connected to the communication data terminal.
  • Fig. 1 is a block diagram showing one example of a roadside beacon system according to this invention.
  • Fig. 2 is a graphical representation indicating the relation between the variation in level of a signal received by a mobile antenna and reference levels.
  • Figs. 3 and 4 are a plan view and a perspective view, respectively, outlining the roadside beacon system.
  • Fig. 5 is a schematic diagram showing one example of a road map displayed on a display unit in the system of the invention.
  • Fig. 5 is a diagram showing one example of a road map displayed on a display unit.
  • the present position and traveling direction of the vehicle is indicated by the arrow A.
  • the positions of roadside antennas P1, P2,... and P n are also indicated (the indication of these roadside antennas not always being required).
  • buildings or the like which can be used a guides are indicated.
  • Figs. 3 and 4 are schematic diagrams for a description of the road-side beacon system according to the invention.
  • a roadside antenna 2 is installed at a predetermined position near a road 1.
  • the roadside antenna 2 is connected to a navigation data transmitter 2a to transmit a signal including position data and road direction data.
  • a mobile antenna 4 for receiving the aforementioned signal is installed at a predetermined position on a vehicle 3 which runs along the road 1.
  • the signal received by the mobile antenna 4 is supplied to a navigation device (not shown in Figs. 3 and 4).
  • the roadside antenna 2 is so high in directivity that it covers only a relatively small area R in Fig. 4.
  • the roadside antenna 2 is such that it is non-directional for instance in a horizontal direction.
  • Fig. 1 is a block diagram showing one example of the roadside beacon system according to the invention.
  • the signal passed through the gate circuit 8 is temporarily stored in a memory 9.
  • necessary communication data are read out by a CRT display device 11a connected to a communication data terminal 11.
  • data such as road direction data and map data are transferred into a navigation device.
  • the present position data is applied to a navigator 10 in response to a position determining signal (or timing pulse signal) outputted by the high level determining circuit 6, so that the present position is calibrated.
  • the determining reference levels of the level determining circuits 6 and 7 are set, to L1 and L2 (L1>L2) respectively.
  • the level of as signal received by the mobile antenna 4 is substantially zero (0). Therefore, signals whose levels are lower than the determining reference levels L1 and L2 are applied to both the level determining circuits 6 and 7. Therefore, the gate circuit 8 is maintained closed and no data is transferred to the memory 9, e.g., during the period T1 in Fig. 2.
  • the level of the signal received by the antenna 4 gradually increases. However, the above-described operation is continued until the level of the signal applied to the low level determining circuit 7 becomes higher than the determining reference level L2, (e.g., during the period T2 in Fig. 2).
  • the navigator 10 calculates and determines the present direction and the traveling direction of the vehicle according to the vehicle speed data outputted by a vehicle speed sensor (not shown) and the traveling direction data provided by a direction sensor (not shown), so that the present position and traveling direction of the vehicle together with the road map are displayed on the display unit (not shown).
  • the level of the signal received by the antenna becomes higher.
  • the gate circuit 8 is opened by the data-transmitting-area determination signal outputted by the low level determining circuit 7.
  • the signal received by the mobile antenna 4 and amplified by the amplifier 5 is stored in the memory 9, (e.g., during the period T3 in Fig. 2) and predetermined data are applied to the communication data terminal 11 and the necessary data are inputted into the navigator 10.
  • the level of the signal received by the mobile antenna 4 is further increased and the level of the signal supplied to the high level determining circuit 6 exceeds the high reference level L1 so that the high level determining circuit 6 outputs a position determination signal which is applied to the navigator 10.
  • the position data is transferred to the navigator 10, so the present position stored in the navigator 10 is calibrated.
  • the position data and the traveling direction data have been calibrated. That is, the correct present position and traveling direction can be displayed on the display unit.
  • the position and the traveling direction of the vehicle 3 can be displayed as a function of time with the arrow A on the display unit 11a together with the road map using the vehicle speed data outputted by the vehicle speed sensor and the traveling direction data provided by the direction sensor.
  • Fig. 2 shows the variation in level of the signal received by the vehicle 3 which runs at a constant speed.
  • the periods T1, T2 and T3 are merely varied, shortened or lengthened, according to the speeds, which will not change the effect of the invention.
  • the necessary data are stored in the memory 9 temporarily, and the predetermined data are store in the navigator 10. Only when the vehicle has sufficiently approached the roadside antenna 2 is the position data transferred to the navigator 10 so that the present position and the traveling direction of the vehicle are calibrated. Therefore, even if the number of pieces of data transmitted through the roadside antenna 2 increases, the data can be positively written in the navigator 10. Therefore, the system can perform a variety of functions (such as displaying road conditions and traffic congestion). Furthermore, other necessary communication data can be transmitted to the communication data terminal 11. Since the position detection of the vehicle 3 is carried out when the vehicle comes sufficiently close to the roadside antenna 2 and the received signal level reaches the peak value, the position of the vehicle 3 can be detected with high accuracy.
  • the threshold level for storing data transmitted through the roadside antenna is set at a low level and the treshould level for detecting the position of the vehicle is set to a high level with the result that the position detection is carried out with high accuracy and the number of pieces of data transmitted can be increased.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Remote Sensing (AREA)
  • Traffic Control Systems (AREA)
  • Navigation (AREA)

Claims (4)

  1. Ein Straßenleitsystem, welches umfaßt:

    eine Vielzahl von Antennen, die entlang von Seiten der Straßen an vorbestimmten Positionen installiert und mit wenigstens einer Datenübertragungseinrichtung zum Übertragen eines Datensignals zu Fahrzeugen verbunden sind; und

    eine Navigatoreinrichtung, die in wenigstens einem der Fahrzeuge installiert ist, wobei jede Navigatoreinrichtung umfaßt:

    eine Datensignalempfangseinrichtung zum Empfangen der übertragenen Datensignale von einer der Antennen, wenn ein Pegel des übertragenen Datensignals höher als ein erster Pegel ist, und zum Ausgeben eines Datensignals,

    eine Positionsbestimmungseinrichtung zum Empfangen des übertragenen Datensignals, wenn das übertragene Datensignal wesentlich höher ist als ein zweiter Pegel, der höher als der erste Pegel ist, und zum Ausgeben eines Positionsbestimmungssignals,

    eine Kalibriereinrichtung zum Kalibrieren, entsprechend dem Daten- und Positionsbestimmungssignal, von Positionsdaten des Fahrzeugs, in welchem die jeweilige Navigatoreinrichtung installiert ist, und

    eine Einrichtung zum Anzeigen der kalibrierten Positionsdaten für das Fahrzeug.
  2. Ein Straßenleitsystem nach Anspruch 1, wobei der erste Pegel relativ zu einem Störsignalpegel der Übertragung von den Antennen eingestellt ist.
  3. Ein Straßenleitsystem nach Anspruch 1, wobei der zweite Pegel entsprechend einem wesentlichen Anteil eines Pegels des übertragenen Signals, welches durch das einer von den Antennen unmittelbar gegenüberliegende Fahrzeug, während es sich auf den Straßen befindet, empfangen wird, eingestellt ist.
  4. Ein Straßenleitsystem nach Anspruch 1, wobei die Navigatoreinrichtung einen das Datensignal empfangenden Gate-Schaltkreis, einen das Ausgangssignal des Gate-Schaltkreises empfangenden Speicher, einen ersten, mit dem ersten Pegel getriggerten Bestimmungsschaltkreis, der den Gate-Schaltkreis veranlaßt, das Datensignal in den Speicher zu leiten, und einen zweiten, durch den zweiten Pegel getriggerten Bestimmungschaltkreis, der die Navigatoreinrichtung veranlaßt, die aus dem Speicher empfangenen Positionskalibrierungsdaten zu verarbeiten, enthält.
EP19870103562 1986-03-14 1987-03-12 Strassenleitsystem Expired - Lifetime EP0243635B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57369/86 1986-03-14
JP5736986A JPS62212897A (ja) 1986-03-14 1986-03-14 ナビゲータ装置

Publications (3)

Publication Number Publication Date
EP0243635A2 EP0243635A2 (de) 1987-11-04
EP0243635A3 EP0243635A3 (en) 1989-04-26
EP0243635B1 true EP0243635B1 (de) 1993-01-13

Family

ID=13053673

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870103562 Expired - Lifetime EP0243635B1 (de) 1986-03-14 1987-03-12 Strassenleitsystem

Country Status (4)

Country Link
EP (1) EP0243635B1 (de)
JP (1) JPS62212897A (de)
CA (1) CA1277014C (de)
DE (1) DE3783504T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007112849A2 (de) * 2006-03-31 2007-10-11 Volkswagen Aktiengesellschaft Navigationsanordnung und navigationsverfahren fur ein kraftfahrzeug

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100526571B1 (ko) * 2003-11-12 2005-11-04 삼성전자주식회사 오프-보드 네비게이션 시스템 및 그의 오차 보정 방법
US9052214B2 (en) 2006-05-22 2015-06-09 Volkswagen Ag Navigation system for a motor vehicle, method for operating a navigation system and motor vehicle including a navigation system
US9478133B2 (en) 2006-03-31 2016-10-25 Volkswagen Ag Motor vehicle and navigation arrangement for a motor vehicle
US8700308B2 (en) 2006-03-31 2014-04-15 Volkswagen Ag Navigation system for a motor vehicle
US20070233371A1 (en) 2006-03-31 2007-10-04 Arne Stoschek Navigation system for a motor vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829577A1 (de) * 1978-07-05 1980-01-24 Siemens Ag Verfahren und einrichtung zur ortung flaechengebundener fahrzeuge
JPS55127741A (en) * 1979-03-26 1980-10-02 Nissan Motor Co Ltd Vehicle communication unit
DE2923634C2 (de) * 1979-06-11 1985-01-17 Siemens AG, 1000 Berlin und 8000 München Leitsystem für den Individualverkehr

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007112849A2 (de) * 2006-03-31 2007-10-11 Volkswagen Aktiengesellschaft Navigationsanordnung und navigationsverfahren fur ein kraftfahrzeug
WO2007112849A3 (de) * 2006-03-31 2007-11-29 Volkswagen Ag Navigationsanordnung und navigationsverfahren fur ein kraftfahrzeug

Also Published As

Publication number Publication date
DE3783504D1 (de) 1993-02-25
JPH0580717B2 (de) 1993-11-10
EP0243635A2 (de) 1987-11-04
DE3783504T2 (de) 1993-05-13
JPS62212897A (ja) 1987-09-18
EP0243635A3 (en) 1989-04-26
CA1277014C (en) 1990-11-27

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