JPS57106865A - Optical car speed detection - Google Patents

Optical car speed detection

Info

Publication number
JPS57106865A
JPS57106865A JP18323180A JP18323180A JPS57106865A JP S57106865 A JPS57106865 A JP S57106865A JP 18323180 A JP18323180 A JP 18323180A JP 18323180 A JP18323180 A JP 18323180A JP S57106865 A JPS57106865 A JP S57106865A
Authority
JP
Japan
Prior art keywords
car
distance
detecting
optical
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.)
Pending
Application number
JP18323180A
Other languages
Japanese (ja)
Inventor
Yutaka Kato
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP18323180A priority Critical patent/JPS57106865A/en
Publication of JPS57106865A publication Critical patent/JPS57106865A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

PURPOSE:To detect the distance between an optical car speed detector and a car, and to discriminate travelling lane by setting up appropriately the optical pathes of reflected rays from 3 detecting points. CONSTITUTION:A camera 30 inoporates 2 optical systems which are provided with lenses 31 and 32 respectively. The camera 30 is directed to a detecting surface P. The lens 31 includes the 1st and 3rd detecting points P1, P3 which are separated by L2 to each other within its field. The lens 32 detects the 2nd detecting point P2 which is positioned between these detecting points P1 and P2. Respective detecting points P1-P3 are correspondingly provided with photodetectors J1-J3, which detect reflected light when a car with speed V passes through P. If the required time for the distance between P1 and P2 and P2 and P3 are t1 and t2 respectively, the distance (g) between the detector and the car is k1.t2. d2/(k1 .t2-k2.t1) (where, k1 and k2 are constant decided by a1, a2, d1, and d2). Thus, the distance between the car and detector can be measured by t1 and t2.
JP18323180A 1980-12-23 1980-12-23 Optical car speed detection Pending JPS57106865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18323180A JPS57106865A (en) 1980-12-23 1980-12-23 Optical car speed detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18323180A JPS57106865A (en) 1980-12-23 1980-12-23 Optical car speed detection

Publications (1)

Publication Number Publication Date
JPS57106865A true JPS57106865A (en) 1982-07-02

Family

ID=16132070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18323180A Pending JPS57106865A (en) 1980-12-23 1980-12-23 Optical car speed detection

Country Status (1)

Country Link
JP (1) JPS57106865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374919A (en) * 2018-10-14 2019-02-22 深圳市能信安科技股份有限公司 A kind of method and device determining movement speed based on single capture apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109374919A (en) * 2018-10-14 2019-02-22 深圳市能信安科技股份有限公司 A kind of method and device determining movement speed based on single capture apparatus
CN109374919B (en) * 2018-10-14 2020-12-01 深圳市能信安科技股份有限公司 Method and device for determining moving speed based on single shooting device

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