FR2347732A1 - Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier - Google Patents

Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier

Info

Publication number
FR2347732A1
FR2347732A1 FR7610289A FR7610289A FR2347732A1 FR 2347732 A1 FR2347732 A1 FR 2347732A1 FR 7610289 A FR7610289 A FR 7610289A FR 7610289 A FR7610289 A FR 7610289A FR 2347732 A1 FR2347732 A1 FR 2347732A1
Authority
FR
France
Prior art keywords
loop
inductive current
road surface
current loop
vehicle detector
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
FR7610289A
Other languages
French (fr)
Other versions
FR2347732B1 (en
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.)
SP K BJUR
Original Assignee
SP K BJUR
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 SP K BJUR filed Critical SP K BJUR
Priority to FR7610289A priority Critical patent/FR2347732A1/en
Publication of FR2347732A1 publication Critical patent/FR2347732A1/en
Application granted granted Critical
Publication of FR2347732B1 publication Critical patent/FR2347732B1/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
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

The vehicle detector uses an inductive current loop (4) which is embedded in the road surface and which is connected to a resonance amplifier (2), receiving an input signal from a frequency generator (1). The output of the resonance amplifier (2) is connected to a frequency-responsive circuit (5), which is itself connected to an integrator (6). A signal forming circuit responsive to the vehicle entering the inductive current loop (4) and a signal forming circuit responsive to the vehicle leaving it are provided in the form of a differential amplifier (7), connected to the integrator (6). The output of the differential amplifier (7) is connected to a threshold circuit (8) in series, with an output device (9).
FR7610289A 1976-04-08 1976-04-08 Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier Granted FR2347732A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7610289A FR2347732A1 (en) 1976-04-08 1976-04-08 Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7610289A FR2347732A1 (en) 1976-04-08 1976-04-08 Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier

Publications (2)

Publication Number Publication Date
FR2347732A1 true FR2347732A1 (en) 1977-11-04
FR2347732B1 FR2347732B1 (en) 1978-09-01

Family

ID=9171568

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7610289A Granted FR2347732A1 (en) 1976-04-08 1976-04-08 Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier

Country Status (1)

Country Link
FR (1) FR2347732A1 (en)

Also Published As

Publication number Publication date
FR2347732B1 (en) 1978-09-01

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Legal Events

Date Code Title Description
ST Notification of lapse