FR2417777A1 - Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar - Google Patents

Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar

Info

Publication number
FR2417777A1
FR2417777A1 FR7804661A FR7804661A FR2417777A1 FR 2417777 A1 FR2417777 A1 FR 2417777A1 FR 7804661 A FR7804661 A FR 7804661A FR 7804661 A FR7804661 A FR 7804661A FR 2417777 A1 FR2417777 A1 FR 2417777A1
Authority
FR
France
Prior art keywords
detector
radar
low power
counter
stopping
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.)
Granted
Application number
FR7804661A
Other languages
French (fr)
Other versions
FR2417777B1 (en
Inventor
Robert Verdier
Bernard Georges
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.)
INST RECH TRANSPORTS
Original Assignee
INST RECH TRANSPORTS
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 INST RECH TRANSPORTS filed Critical INST RECH TRANSPORTS
Priority to FR7804661A priority Critical patent/FR2417777A1/en
Publication of FR2417777A1 publication Critical patent/FR2417777A1/en
Application granted granted Critical
Publication of FR2417777B1 publication Critical patent/FR2417777B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
    • G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules

Abstract

The detector circuit operating in conjunction with low power radar spaced sensor is used to sense whether or not a motor vehicle stops at a red traffic light. The radar output signal is wave shaped (1) to control set to zero of a counter (2) which records pulses from a generator (3) via a latching circuit (4). A bistable (5) receives counter and radar signals and determines whether or not the vehicle has stopped. A detector loop output is signalled via relay with anti parasitic bistable (6). This signal is gated (8) with zero speed signal from the counter bistable. This allows the alarm relay (10) circuit to be operated.
FR7804661A 1978-02-17 1978-02-17 Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar Granted FR2417777A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7804661A FR2417777A1 (en) 1978-02-17 1978-02-17 Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7804661A FR2417777A1 (en) 1978-02-17 1978-02-17 Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar

Publications (2)

Publication Number Publication Date
FR2417777A1 true FR2417777A1 (en) 1979-09-14
FR2417777B1 FR2417777B1 (en) 1980-10-17

Family

ID=9204746

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7804661A Granted FR2417777A1 (en) 1978-02-17 1978-02-17 Detector for sensing vehicles not stopping at traffic lights - has pulse generator connected to counter via latching circuit for use with low power speed sensing radar

Country Status (1)

Country Link
FR (1) FR2417777A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689996A1 (en) * 1992-04-14 1993-10-15 Sagem Set of two beacons transmitting road signaling signals and associated on-board receiver.
EP0989408A1 (en) * 1998-09-24 2000-03-29 Vossloh MAN Systemelektronik GmbH Method for determining deceleration and standstill of a moved body, apparatus for performing the method, and use thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689996A1 (en) * 1992-04-14 1993-10-15 Sagem Set of two beacons transmitting road signaling signals and associated on-board receiver.
EP0566437A1 (en) * 1992-04-14 1993-10-20 Societe D'applications Generales D'electricite Et De Mecanique Sagem Assembly of two beacons for road signalling and associated on board receiver
EP0989408A1 (en) * 1998-09-24 2000-03-29 Vossloh MAN Systemelektronik GmbH Method for determining deceleration and standstill of a moved body, apparatus for performing the method, and use thereof

Also Published As

Publication number Publication date
FR2417777B1 (en) 1980-10-17

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Legal Events

Date Code Title Description
ST Notification of lapse