FR2296231A1 - Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles - Google Patents

Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles

Info

Publication number
FR2296231A1
FR2296231A1 FR7442869A FR7442869A FR2296231A1 FR 2296231 A1 FR2296231 A1 FR 2296231A1 FR 7442869 A FR7442869 A FR 7442869A FR 7442869 A FR7442869 A FR 7442869A FR 2296231 A1 FR2296231 A1 FR 2296231A1
Authority
FR
France
Prior art keywords
photocells
monitoring unit
disc
traffic control
pulse rates
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.)
Pending
Application number
FR7442869A
Other languages
French (fr)
Inventor
Bernard Louis Yves Dubuisson
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.)
Engins Matra SA
Original Assignee
Engins Matra SA
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 Engins Matra SA filed Critical Engins Matra SA
Priority to FR7442869A priority Critical patent/FR2296231A1/en
Priority to DE19752557185 priority patent/DE2557185A1/en
Priority to IT3074075A priority patent/IT1051937B/en
Publication of FR2296231A1 publication Critical patent/FR2296231A1/en
Pending 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
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

The monitoring unit may either be located over a road on a fixed gantry or else on the underside fuselage of a traffic control aircraft. A lens located at the apex of a pyramid section housing has a ground glass screen on the top surface. The detector consists of a disc with two rows of photocells parallel to each other. The disc has an annular ring gear that may be rotated by turning an adjusting knob. The disc is mounted in a central plate that may be moved in one direction in a compound slide that is located in guides. For traffic monitoring the photocells are aligned perpendicular to the traffic flow. Pulse rates permit traffic parameters to be measured.
FR7442869A 1974-12-26 1974-12-26 Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles Pending FR2296231A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7442869A FR2296231A1 (en) 1974-12-26 1974-12-26 Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles
DE19752557185 DE2557185A1 (en) 1974-12-26 1975-12-18 Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles
IT3074075A IT1051937B (en) 1974-12-26 1975-12-23 ROAD TRAFFIC DETECTION DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7442869A FR2296231A1 (en) 1974-12-26 1974-12-26 Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles

Publications (1)

Publication Number Publication Date
FR2296231A1 true FR2296231A1 (en) 1976-07-23

Family

ID=9146651

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7442869A Pending FR2296231A1 (en) 1974-12-26 1974-12-26 Traffic control monitoring unit - photocells generate pulse rates for determination of speed, number and length of vehicles

Country Status (1)

Country Link
FR (1) FR2296231A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476562A2 (en) * 1990-09-19 1992-03-25 Hitachi, Ltd. Method and apparatus for controlling moving body and facilities

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476562A2 (en) * 1990-09-19 1992-03-25 Hitachi, Ltd. Method and apparatus for controlling moving body and facilities
EP0476562A3 (en) * 1990-09-19 1993-02-10 Hitachi, Ltd. Method and apparatus for controlling moving body and facilities
US5335180A (en) * 1990-09-19 1994-08-02 Hitachi, Ltd. Method and apparatus for controlling moving body and facilities

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