JPS6414698A - Optical vehicle detector - Google Patents

Optical vehicle detector

Info

Publication number
JPS6414698A
JPS6414698A JP62170241A JP17024187A JPS6414698A JP S6414698 A JPS6414698 A JP S6414698A JP 62170241 A JP62170241 A JP 62170241A JP 17024187 A JP17024187 A JP 17024187A JP S6414698 A JPS6414698 A JP S6414698A
Authority
JP
Japan
Prior art keywords
noise
stroboscope
influence
weak correlation
utilizing
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
JP62170241A
Other languages
Japanese (ja)
Other versions
JP2558714B2 (en
Inventor
Minoru Suzuki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62170241A priority Critical patent/JP2558714B2/en
Publication of JPS6414698A publication Critical patent/JPS6414698A/en
Application granted granted Critical
Publication of JP2558714B2 publication Critical patent/JP2558714B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Traffic Control Systems (AREA)

Abstract

PURPOSE:To prevent the misdetection due to the influence of the stroboscope of an adjoining lane by utilizing that the noise due to the influence of the stroboscope has the weak correlation to the time. CONSTITUTION:An infrared reflection signal is light-received by plural photodetectors 4, only the difference between the light-received level and the sample-held level is converted to a digital signal and successively stored. Selection is executed so that the adjoining data of the photodetector 4 does not go to the simultaneously sample-held difference output, and an image processing is executed. Namely, by paying attention to that the influence (noise) due to the stroboscope has the weak correlation to the time and utilizing a RAM 16, the serial data column of 32 pieces of photodetectors 4 can have the very weak correlation to the noise, and by providing a digital filter 18 on the data column, the noise can be effectively eliminated.
JP62170241A 1987-07-08 1987-07-08 Optical vehicle detection device Expired - Fee Related JP2558714B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62170241A JP2558714B2 (en) 1987-07-08 1987-07-08 Optical vehicle detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62170241A JP2558714B2 (en) 1987-07-08 1987-07-08 Optical vehicle detection device

Publications (2)

Publication Number Publication Date
JPS6414698A true JPS6414698A (en) 1989-01-18
JP2558714B2 JP2558714B2 (en) 1996-11-27

Family

ID=15901285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62170241A Expired - Fee Related JP2558714B2 (en) 1987-07-08 1987-07-08 Optical vehicle detection device

Country Status (1)

Country Link
JP (1) JP2558714B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314197A (en) * 1989-06-13 1991-01-22 Matsushita Electric Ind Co Ltd Optical vehicle detector
JPH0314198A (en) * 1989-06-13 1991-01-22 Matsushita Electric Ind Co Ltd Optical vehicle detection device
US5915032A (en) * 1989-08-22 1999-06-22 Minnesota Mining And Manufacturing Company Method and apparatus for machine reading of retroreflective vehicle identification articles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314197A (en) * 1989-06-13 1991-01-22 Matsushita Electric Ind Co Ltd Optical vehicle detector
JPH0314198A (en) * 1989-06-13 1991-01-22 Matsushita Electric Ind Co Ltd Optical vehicle detection device
US5915032A (en) * 1989-08-22 1999-06-22 Minnesota Mining And Manufacturing Company Method and apparatus for machine reading of retroreflective vehicle identification articles

Also Published As

Publication number Publication date
JP2558714B2 (en) 1996-11-27

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees