FR2275776A1 - Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports - Google Patents

Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports

Info

Publication number
FR2275776A1
FR2275776A1 FR7421295A FR7421295A FR2275776A1 FR 2275776 A1 FR2275776 A1 FR 2275776A1 FR 7421295 A FR7421295 A FR 7421295A FR 7421295 A FR7421295 A FR 7421295A FR 2275776 A1 FR2275776 A1 FR 2275776A1
Authority
FR
France
Prior art keywords
vehicle speed
speed measuring
road vehicle
eqpt
light beams
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
FR7421295A
Other languages
French (fr)
Other versions
FR2275776B1 (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.)
Societe de Fabrication dInstruments de Mesure SFIM SA
Original Assignee
Societe de Fabrication dInstruments de Mesure SFIM 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 Societe de Fabrication dInstruments de Mesure SFIM SA filed Critical Societe de Fabrication dInstruments de Mesure SFIM SA
Priority to FR7421295A priority Critical patent/FR2275776A1/en
Publication of FR2275776A1 publication Critical patent/FR2275776A1/en
Application granted granted Critical
Publication of FR2275776B1 publication Critical patent/FR2275776B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light

Abstract

A road vehicle speed measuring system uses two supports (1, 2) placed opposite each other, one of the supports (1) carrying means (4) of producing two parallel and coplanar beams (8, 10) directed towards the other support (2), this support (2) carrying two photodetectors (12, 13) separated by the same distance as that between the parallel beams (8, 10). Each support has a general T-shape and is equipped with three feet (3) of variable height positioned at the extremities of the cross and of the stem of the T respectively.
FR7421295A 1974-06-19 1974-06-19 Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports Granted FR2275776A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7421295A FR2275776A1 (en) 1974-06-19 1974-06-19 Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7421295A FR2275776A1 (en) 1974-06-19 1974-06-19 Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports

Publications (2)

Publication Number Publication Date
FR2275776A1 true FR2275776A1 (en) 1976-01-16
FR2275776B1 FR2275776B1 (en) 1976-10-15

Family

ID=9140247

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421295A Granted FR2275776A1 (en) 1974-06-19 1974-06-19 Road vehicle speed measuring eqpt. - parallel light beams and photo detectors mounted on adjustable supports

Country Status (1)

Country Link
FR (1) FR2275776A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562762A (en) * 2018-01-26 2018-09-21 中国科学院大气物理研究所 A kind of sea spray measuring device and method based on twin-line array
US11828905B2 (en) 2018-01-26 2023-11-28 Institute Of Atmospheric Physics, Chinese Academy Of Sciences Dual line diode array device and measurement method and measurement device for particle velocity

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108562762A (en) * 2018-01-26 2018-09-21 中国科学院大气物理研究所 A kind of sea spray measuring device and method based on twin-line array
US11828905B2 (en) 2018-01-26 2023-11-28 Institute Of Atmospheric Physics, Chinese Academy Of Sciences Dual line diode array device and measurement method and measurement device for particle velocity

Also Published As

Publication number Publication date
FR2275776B1 (en) 1976-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse