EP0575907A1 - System zum Empfangen und Senden von Nachrichten zwischen ortsfesten und beweglichen Stationen - Google Patents

System zum Empfangen und Senden von Nachrichten zwischen ortsfesten und beweglichen Stationen Download PDF

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Publication number
EP0575907A1
EP0575907A1 EP93109767A EP93109767A EP0575907A1 EP 0575907 A1 EP0575907 A1 EP 0575907A1 EP 93109767 A EP93109767 A EP 93109767A EP 93109767 A EP93109767 A EP 93109767A EP 0575907 A1 EP0575907 A1 EP 0575907A1
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EP
European Patent Office
Prior art keywords
circuit module
low
information
input
module
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.)
Withdrawn
Application number
EP93109767A
Other languages
English (en)
French (fr)
Inventor
Angelo Cacciotti
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.)
Denso Manufacturing Italia SpA
Original Assignee
Magneti Marelli Rete SpA
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 Magneti Marelli Rete SpA filed Critical Magneti Marelli Rete SpA
Publication of EP0575907A1 publication Critical patent/EP0575907A1/de
Withdrawn legal-status Critical Current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
    • G08G1/096708—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
    • G08G1/0967—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

Definitions

  • the present invention relates to a system for the reception and transmission of information between a plurality of transmitting stations installed or otherwise located along a road network, motorway or normal road way, and a plurality of receiving stations installed on motor vehicles.
  • the object of the present invention is therefore that of eliminating the disadvantage just mentioned and of providing a system for the reception and transmission of information, with transmission from transmitting stations of coded signals relating to events or to particular road conditions and with a reception which takes place at a distance of about 300 metres from the critical point.
  • Another object of the present invention is that of providing a plurality of transmitting stations in which the road condition, environmental and climatic information detected in a given locality can be transferred upstream of the transmitting stations to other transmitting stations to alert motorists before their arrival at the critical zone.
  • Another object of the present invention is that of passing the detected information to a control unit which can send commands and/or information to selectable transmitting stations.
  • the invention which is set out in the claims, solves the problems of providing a system for the reception and transmission of information to motorists between fixed and mobile stations, and from the general point of view, is characterised by the fact that it comprises a sensor circuit module connected by a bidirectional connection to sensor devices to supply them and to detect parameters characteristic of the information and subsequently compare the said parameters with predetermined reference levels, providing at their output an information signal identified by means of logic states; a processor circuit module for managing, recognising, selecting, generating and processing all the information which it receives at its input, and for generating at its output one or more coded signals identified by a ten bit word containing all the information relating to the event to be signalled or to the command to be executed in accordance with the information coming from the said sensor circuit module; a communication circuit module, constituted by a micro processor, for bidirectional management of messages identified by the said coded signals coming from the processor circuit module, and via a bidirectional connection from a control unit and from a further plurality of transmitting stations installed along the road network;
  • the system subject of the invention for the reception and transmission of information to motorists between fixed and mobile stations principally provides a plurality of transmitter stations T installed or otherwise located along a road network with a radius of action of 300 metres, and a plurality of mobile receiver stations installed in motor vehicles and a plurality of sensor devices S disposed along the road network for detection information on the ambient and climatic road conditions.
  • each transmitter station T logically managed with dedicated firmware, comprises a sensor circuit module MS which is connected by a bidirectional connection 1 to the said sensor devices S.
  • the said sensor circuit module MS has the purpose both of supplying the sensor devices S and of detecting the characteristic parameters of the information, and subsequently, comparing the said parameters with predetermined reference levels, providing at an output 2 an information signal identified by logic states, for example an on/off signal relating to snow, ice etc.
  • the reference ME indicates a processor circuit module which serves the function of guaranteeing a correct interface and correct execution of the following functions: code generation, code selection, road condition type selection, sensor management, audio message priority selection, network code management, commands from a control unit, and RF module selection.
  • the said module ME manages, recognises, selects, generates and processes all the information which it receives at the input 2 and generates both at its output 3 and its output 6 one or more coded signals identified by a ten bit word containing all the information relating to the event to be signalled or to the command to be executed in correspondence with the information coming from the said sensor circuit module MS.
  • the said bits from b6 to b9 can determine up to 16 configurations of codes relating to events to be signalled.
  • MC indicates a communication circuit module which serves an interface function, with a bidirectional connection 4, between the location of a particular transmitter station T and other stations T or the said control unit UC.
  • detected information can be passed back upstream from station to station, in such a way as to alert motorists before their arrival at the critical zone.
  • information can be sent back to the control unit UC where it can be processed so as to allow retransmission of targeted information, for example directed to particular transmitter stations T.
  • the said module MC is constituted by a microprocessor (not shown in the Figure) which serves to manage bidirectionally both the information identified by the said coded signals, that is to say the said codes, coming from the processor circuit module ME, and the audio messages coming from the said control unit UC by means of the said bidirectional connection 4 from the control unit UC.
  • the module MC Upon commencement of an audio message from the control unit UC the module MC sends, to the module ME, a command signal such that it can process the code 14 and send it via the output 6 to a transmitter circuit module MT.
  • the said module ME after sending the code 14 , interrupts the sending of other codes.
  • the module MC sends an end-of-message signal to the module ME which returns to its normal function after having transmitted the code 13.
  • the said communication circuit module MC receives, at its input 5, from the said sensor circuit module MS, a signal identified by means of logic states which indicate that a certain sensor device S is activated.
  • the said transmitter circuit module MT is constituted by an amplitude modulation section and a frequency modulation section which receives, at input 6, the said coded signals relating to the event to be signalled from the said processor circuit module ME and at input 7 the audio message from the said communication circuit module MC.
  • a supply circuit module MA that provides a stabilised voltage for supplying each circuit module MS, ME, MT, MC of the transmitter station T.
  • the said module ME comprises a code generation module MG for generation of coded signals identified by the codes.
  • the said module MG receives an input 12 from a message selector module MSM for selecting the code to be transmitted, an input 13 from a transmission selector module MST for selecting among three states corresponding to activation for amplitude modulation, frequency modulation, and a cyclic alternation of amplitude modulation and frequency modulation, and an input 14 from a road network selector module MSV for selecting the road network relevant to the vehicle to be alerted such that MG generates a code corresponding to the type of road network on which the transmitter station T is installed.
  • the directionality characteristic is, in fact, activated only on motorways and on high speed roads, for example bypasses, whilst it is not indicated for normal roads for example on provincial roads.
  • a transmitter station T in correspondence with the inputs of this road network, is installed in a suitable position such as to transmit the direction or reference codes 11 or 12.
  • FIG 4 there is shown a block diagram of the supply circuit module MA.
  • the said module MA comprises a battery B which can be interfaced with solar panels PS and/or with a mains supply RA at 220V .
  • a voltage regulator is indicated RT, and serves to stabilise the output voltage at a fixed value, the output of the voltage regulator being connected to the respective modules MS, MC and ME, whilst RT is connected serially to a switching and control device DC connected to the input of the said transmitter module MT for sending a transmission interruption signal when the signal falls below a predetermined threshold.
  • the said system for transmission and reception of information includes a plurality of receiver stations R installed on motor vehicles.
  • the said receiver stations R are logically managed with dedicated firmware.
  • each station R comprises a radio frequency circuit module RF, with automatic gain control, for recovering information received from an antenna A.
  • the said RF module is constituted by an AM/FM receiver, a squaring circuit SQ for recovering the signal, and a circuit CP for control of the carrier level.
  • the said module RF is connected to a logic circuit module ML which is provided with appropriate firmware for recognition of the codes and decoding the information received at input 8 from the said circuit module RF.
  • the module ML outputs respectively from its output 9 selection and timing/activation commands and, from output 10, selection, timing/activation and memory control commands.
  • the module ML comprises a decoder D for recognising, selecting and decoding information coming from the said circuit module RF.
  • a decoder D for recognising, selecting and decoding information coming from the said circuit module RF.
  • the module ML at its input 8 arrives decoded information recovered by the squaring circuit SQ, and in particular from the circuit CP via connection 8A, the signal identifying the level of the carrier.
  • the level of the carrier goes directly to the decoder D for analysis; if the level exceeds a preset value signal handling is enabled, otherwise though detecting a code, signal handling does not take place. In this way intermittent signalling due to momentary weakening of the radiated field is avoided.
  • the said decoder D is connected bidirectionally to a directionality circuit module MD constituted by a memory for motorway direction as determined by information from the corresponding sensor devices S.
  • the said decoder D provides an activation signal at its output 19 for a timer module CT.
  • the reference TM indicates a silencing circuit module which outputs on line 18, to the logic circuit module ML, in particular to the decoder D, Figure 6, a deactivation command for blocking out the information coming from the said RF circuit module in such a way that the said receiver station R cannot provide any information after the vehicle has passed beyond predetermined positions relative to the signalled event.
  • Reference AM shows an audio circuit module operable to receive on input line 11 information coming from the RF circuit module and the commands for selection, timing/activation and memory control from the logic circuit module ML on input line 10, in particular coming from the decoder D in such a way as to activate sound circuit means CS.
  • the said audio module AM comprises, as is shown in Figure 7, a synthesizer SI which receives on input line 10 from the decoder D the code relating to the address and the message to be emitted.
  • the said module AM further includes a data memory M which is connected to the said synthesizer SI, and in which the audio messages to be transmitted are pre-stored.
  • the synthesizer SI is serially connected at its output with a low pass filter FP, an amplifier A1, and a loud speaker A2. Moreover, between the said synthesizer SI and said low pass filter there is connected a voice decoder DEC receiving on input line 11 the audio message coming from the said RF circuit module.
  • the reference SM indicates a signalling circuit module which receives on input line 9 from the said logic circuit module ML, the said selection and timing/activation command signals for the visual representation of the received information.

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  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Traffic Control Systems (AREA)
EP93109767A 1992-06-26 1993-06-18 System zum Empfangen und Senden von Nachrichten zwischen ortsfesten und beweglichen Stationen Withdrawn EP0575907A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM920490 1992-06-26
ITRM920490A IT1254595B (it) 1992-06-26 1992-06-26 Sistema per la rice-trasmissione di informazioni tra stazioni fisse e mobili.

Publications (1)

Publication Number Publication Date
EP0575907A1 true EP0575907A1 (de) 1993-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109767A Withdrawn EP0575907A1 (de) 1992-06-26 1993-06-18 System zum Empfangen und Senden von Nachrichten zwischen ortsfesten und beweglichen Stationen

Country Status (2)

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EP (1) EP0575907A1 (de)
IT (1) IT1254595B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714556A1 (fr) * 1993-12-27 1995-06-30 Telia Ab Dispositif dans un système de communication mobile à courte distance.
EP0685828A1 (de) * 1994-06-03 1995-12-06 Heinrich Prof. Dipl.-Ing. Schüssler Datenübertragung von einer Feststation zu einem bewegten Körper
ES2101617A1 (es) * 1993-12-31 1997-07-01 Gonzalez Jose Jorba Cono de señalizacion.
EP0860804A2 (de) * 1997-02-19 1998-08-26 Giovanni Gualdi System zur Detektierung und Signalisierung von Objekten auf einer Fahrbahn

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105119A (en) * 1960-04-07 1963-09-24 Gen Motors Corp Highway communication system
US3899671A (en) * 1974-02-27 1975-08-12 Harris A Stover Communication systems
DE2615797A1 (de) * 1976-04-10 1977-10-27 Vdo Schindling Einrichtung zum uebermitteln von informationen
DE3536820A1 (de) * 1985-10-16 1987-04-16 Bosch Gmbh Robert Verkehrfunk-decoder
DE3824541A1 (de) * 1988-07-20 1990-01-25 Felix Johannes Dipl I Overbeck Fruehwarnsystem fuer kraftfahrer
FR2670018A1 (fr) * 1990-11-29 1992-06-05 Chevalier Jean Pierre Dispositif radio de signalisation d'un danger ponctuel sur le reseau routier.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3105119A (en) * 1960-04-07 1963-09-24 Gen Motors Corp Highway communication system
US3899671A (en) * 1974-02-27 1975-08-12 Harris A Stover Communication systems
DE2615797A1 (de) * 1976-04-10 1977-10-27 Vdo Schindling Einrichtung zum uebermitteln von informationen
DE3536820A1 (de) * 1985-10-16 1987-04-16 Bosch Gmbh Robert Verkehrfunk-decoder
DE3824541A1 (de) * 1988-07-20 1990-01-25 Felix Johannes Dipl I Overbeck Fruehwarnsystem fuer kraftfahrer
FR2670018A1 (fr) * 1990-11-29 1992-06-05 Chevalier Jean Pierre Dispositif radio de signalisation d'un danger ponctuel sur le reseau routier.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 29, no. 1, June 1986, NEW YORK US pages 385 - 387 'TRANSPORTATION INFORMATION DISTRIBUTION SYSTEM' *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2714556A1 (fr) * 1993-12-27 1995-06-30 Telia Ab Dispositif dans un système de communication mobile à courte distance.
NL9402215A (nl) * 1993-12-27 1995-07-17 Telia Ab Inrichting in een mobiel kortbereikcommunicatiesysteem.
ES2104504A1 (es) * 1993-12-27 1997-10-01 Telia Ab Disposicion en un sistema movil de comunicaciones de radio de corto alcance
ES2101617A1 (es) * 1993-12-31 1997-07-01 Gonzalez Jose Jorba Cono de señalizacion.
EP0685828A1 (de) * 1994-06-03 1995-12-06 Heinrich Prof. Dipl.-Ing. Schüssler Datenübertragung von einer Feststation zu einem bewegten Körper
EP0860804A2 (de) * 1997-02-19 1998-08-26 Giovanni Gualdi System zur Detektierung und Signalisierung von Objekten auf einer Fahrbahn
EP0860804A3 (de) * 1997-02-19 2000-05-24 Giovanni Gualdi System zur Detektierung und Signalisierung von Objekten auf einer Fahrbahn

Also Published As

Publication number Publication date
ITRM920490A0 (it) 1992-06-26
ITRM920490A1 (it) 1993-12-26
IT1254595B (it) 1995-09-28

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