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GB1125980A - Improvements in or relating to apparatus for detecting the presence of a vehicle at a predetermined position - Google Patents

Improvements in or relating to apparatus for detecting the presence of a vehicle at a predetermined position

Info

Publication number
GB1125980A
GB1125980A GB5778066A GB5778066A GB1125980A GB 1125980 A GB1125980 A GB 1125980A GB 5778066 A GB5778066 A GB 5778066A GB 5778066 A GB5778066 A GB 5778066A GB 1125980 A GB1125980 A GB 1125980A
Authority
GB
United Kingdom
Prior art keywords
detector
detectors
vehicle
light source
output
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.)
Expired
Application number
GB5778066A
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.)
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Original Assignee
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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 Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH filed Critical Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Publication of GB1125980A publication Critical patent/GB1125980A/en
Expired 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
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Traffic Control Systems (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

1,125,980. Vehicle detectors. GRUNDIG E. M. V. ELEKTRO MECHANISCHE VERSUCHSANSTALT INH. MAX. GRUNDIG. 23 Dec., 1966 [16 April, 1966], No. 57780/66. Heading G4Q. A photo-electric vehicle detector of the type wherein a modulated light beam is reflected from the road or from an intervening vehicle on to a detector, the output of which is compared with a signal derived directly from the light source in a balanced modulator feeding an output relay, is characterized in that an auxiliary detector is placed adjacent the first detector and arranged to produce an output of opposite polarity, the arrangement being such that the output relay is operated when the sum of the outputs of the two detectors falls to zero. The main and auxiliary detectors are preferably of rectangular shape and arranged in a T formation with the auxiliary detector lying along the line joining the light source to the detectors and the main detector orthogonal to it and disposed nearer to the light source.
GB5778066A 1966-04-16 1966-12-23 Improvements in or relating to apparatus for detecting the presence of a vehicle at a predetermined position Expired GB1125980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966G0046618 DE1262832B (en) 1966-04-16 1966-04-16 Circuit arrangement for detectors working with light beams, in particular vehicle detectors

Publications (1)

Publication Number Publication Date
GB1125980A true GB1125980A (en) 1968-09-05

Family

ID=7128095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5778066A Expired GB1125980A (en) 1966-04-16 1966-12-23 Improvements in or relating to apparatus for detecting the presence of a vehicle at a predetermined position

Country Status (3)

Country Link
DE (1) DE1262832B (en)
FR (1) FR1511165A (en)
GB (1) GB1125980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264411A (en) * 1992-02-13 1993-08-25 Roke Manor Research Active infrared vehicle detector system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898802A (en) * 1956-01-24 1959-08-11 Ljungberg Lars Rune Photoelectric colorimeter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2264411A (en) * 1992-02-13 1993-08-25 Roke Manor Research Active infrared vehicle detector system
GB2264411B (en) * 1992-02-13 1995-09-06 Roke Manor Research Active infrared detector system

Also Published As

Publication number Publication date
FR1511165A (en) 1968-01-26
DE1262832B (en) 1968-03-07

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