GB1443701A - Traffic signal systems - Google Patents

Traffic signal systems

Info

Publication number
GB1443701A
GB1443701A GB3337572A GB3337572A GB1443701A GB 1443701 A GB1443701 A GB 1443701A GB 3337572 A GB3337572 A GB 3337572A GB 3337572 A GB3337572 A GB 3337572A GB 1443701 A GB1443701 A GB 1443701A
Authority
GB
United Kingdom
Prior art keywords
traffic signal
radar
july
road
transistor
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
GB3337572A
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.)
PEAK TECHNOLOGIES Ltd
Original Assignee
PEAK TECHNOLOGIES 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 PEAK TECHNOLOGIES Ltd filed Critical PEAK TECHNOLOGIES Ltd
Priority to GB3337572A priority Critical patent/GB1443701A/en
Publication of GB1443701A publication Critical patent/GB1443701A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/56—Discriminating between fixed and moving objects or between objects moving at different speeds for presence detection

Abstract

1443701 Road-traffic signalling PEAK TECHNOLOGIES Ltd 16 July 1973 [17 July 1972] 33375/72 Heading G4Q An automatic traffic signal system includes a microwave radar mounted on each traffic signal column, an egg-shaped radiation pattern aimed such that its centre of intersection with the road is where a conventional vehicle detector would be, Figs. 2, 3 (neither shown), and the radar-controlled traffic signal circuitry is tuned to ignore frequency components characteristic of pedestrians. Radar &c. unit, Fig. 1.-Positive D.C. on terminal B is applied to an integrated circuit voltage regulator VR to supply a resonant cavity housing a Gunn diode transmitter receiver described in Specification 1,317,175. The output of amplifier A1 is fed to the base of a transistor VT1. A moving target-"pedestrian" frequencies are removed by capacitors C6, C10 and high-frequency noise by capacitor C9-causes transistor VT1 to conduct and relay RL1 to drop out to control conventionally a traffic signal. Single-lane working necessitates modification to distinguish direction of vehicle travel by using two mixer-detector diodes.
GB3337572A 1972-07-17 1972-07-17 Traffic signal systems Expired GB1443701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3337572A GB1443701A (en) 1972-07-17 1972-07-17 Traffic signal systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3337572A GB1443701A (en) 1972-07-17 1972-07-17 Traffic signal systems

Publications (1)

Publication Number Publication Date
GB1443701A true GB1443701A (en) 1976-07-21

Family

ID=10352116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3337572A Expired GB1443701A (en) 1972-07-17 1972-07-17 Traffic signal systems

Country Status (1)

Country Link
GB (1) GB1443701A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119987A (en) * 1982-04-02 1983-11-23 Ogden Electronics Ltd Traffic control system
GB2246654A (en) * 1990-08-02 1992-02-05 H B Detection Limited Vehicle presence detection system
GB2358269A (en) * 2000-01-11 2001-07-18 Roke Manor Research Vehicle detection
US7426450B2 (en) 2003-01-10 2008-09-16 Wavetronix, Llc Systems and methods for monitoring speed
US7427930B2 (en) 2001-09-27 2008-09-23 Wavetronix Llc Vehicular traffic sensor
US7573400B2 (en) 2005-10-31 2009-08-11 Wavetronix, Llc Systems and methods for configuring intersection detection zones
US7889097B1 (en) 2005-12-19 2011-02-15 Wavetronix Llc Detecting targets in roadway intersections
US7991542B2 (en) 2006-03-24 2011-08-02 Wavetronix Llc Monitoring signalized traffic flow
US8248272B2 (en) 2005-10-31 2012-08-21 Wavetronix Detecting targets in roadway intersections
US8665113B2 (en) 2005-10-31 2014-03-04 Wavetronix Llc Detecting roadway targets across beams including filtering computed positions
US9412271B2 (en) 2013-01-30 2016-08-09 Wavetronix Llc Traffic flow through an intersection by reducing platoon interference
CN109444872A (en) * 2018-11-01 2019-03-08 深圳市戴升智能科技有限公司 The differentiating method of pedestrian and vehicle, device, computer equipment and storage medium
US11055987B2 (en) 2017-01-26 2021-07-06 Nortak Software Ltd. Animated incoming traffic sign

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119987A (en) * 1982-04-02 1983-11-23 Ogden Electronics Ltd Traffic control system
GB2246654A (en) * 1990-08-02 1992-02-05 H B Detection Limited Vehicle presence detection system
GB2246654B (en) * 1990-08-02 1994-03-23 H B Detection Limited Vehicle presence detection system
GB2358269A (en) * 2000-01-11 2001-07-18 Roke Manor Research Vehicle detection
US7427930B2 (en) 2001-09-27 2008-09-23 Wavetronix Llc Vehicular traffic sensor
USRE48781E1 (en) 2001-09-27 2021-10-19 Wavetronix Llc Vehicular traffic sensor
US7426450B2 (en) 2003-01-10 2008-09-16 Wavetronix, Llc Systems and methods for monitoring speed
US9601014B2 (en) 2005-10-31 2017-03-21 Wavetronic Llc Detecting roadway targets across radar beams by creating a filtered comprehensive image
US10276041B2 (en) 2005-10-31 2019-04-30 Wavetronix Llc Detecting roadway targets across beams
US8248272B2 (en) 2005-10-31 2012-08-21 Wavetronix Detecting targets in roadway intersections
US8665113B2 (en) 2005-10-31 2014-03-04 Wavetronix Llc Detecting roadway targets across beams including filtering computed positions
US9240125B2 (en) 2005-10-31 2016-01-19 Wavetronix Llc Detecting roadway targets across beams
US10049569B2 (en) 2005-10-31 2018-08-14 Wavetronix Llc Detecting roadway targets within a multiple beam radar system
US7573400B2 (en) 2005-10-31 2009-08-11 Wavetronix, Llc Systems and methods for configuring intersection detection zones
US7924170B1 (en) 2005-12-19 2011-04-12 Wavetronix Llc Detecting targets in roadway intersections
US7889098B1 (en) 2005-12-19 2011-02-15 Wavetronix Llc Detecting targets in roadway intersections
US7889097B1 (en) 2005-12-19 2011-02-15 Wavetronix Llc Detecting targets in roadway intersections
US7991542B2 (en) 2006-03-24 2011-08-02 Wavetronix Llc Monitoring signalized traffic flow
US9412271B2 (en) 2013-01-30 2016-08-09 Wavetronix Llc Traffic flow through an intersection by reducing platoon interference
US11055987B2 (en) 2017-01-26 2021-07-06 Nortak Software Ltd. Animated incoming traffic sign
CN109444872B (en) * 2018-11-01 2020-07-14 深圳市戴升智能科技有限公司 Pedestrian and vehicle distinguishing method and device, computer equipment and storage medium
CN109444872A (en) * 2018-11-01 2019-03-08 深圳市戴升智能科技有限公司 The differentiating method of pedestrian and vehicle, device, computer equipment and storage medium

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee