GB627053A - Improvements in or relating to apparatus for detecting the position of vehicles and the like - Google Patents

Improvements in or relating to apparatus for detecting the position of vehicles and the like

Info

Publication number
GB627053A
GB627053A GB2545146A GB2545146A GB627053A GB 627053 A GB627053 A GB 627053A GB 2545146 A GB2545146 A GB 2545146A GB 2545146 A GB2545146 A GB 2545146A GB 627053 A GB627053 A GB 627053A
Authority
GB
United Kingdom
Prior art keywords
coils
vehicles
coil
runway
aircraft
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
GB2545146A
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.)
STANLEY SPENCER WEST
TREVOR GRIFFITHS
Cinema Television Ltd
Original Assignee
STANLEY SPENCER WEST
TREVOR GRIFFITHS
Cinema Television 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 STANLEY SPENCER WEST, TREVOR GRIFFITHS, Cinema Television Ltd filed Critical STANLEY SPENCER WEST
Priority to GB2545146A priority Critical patent/GB627053A/en
Publication of GB627053A publication Critical patent/GB627053A/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
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

627,053. Locating conductors. CINEMATELEVISION, Ltd., WEST, S. S., and GRIFFITHS, T. Aug. 26, 1946, No. 25451. [Class 37] [Also in Group XXXVIII] To detect the position of vehicles or aircraft over a runway, a plurality of pairs of coils are disposed in the ground below the runway so that they normally have zero mutual inductance, but the approach of a mass of metal increases the coupling between the coils. The coils may be connected to the input and output of an amplifier system such as that described in Specification 574,808, so that coupling causes the system to oscillate. Alternatively, A.C. may be fed into one coil of a pair, and an indicator connected to the other coil. In the latter case, a phase detector may be used to differentiate between the phase of the induced oscillations due to the different " impedance " of vehicles and aircraft. Airfield service vehicles may carry a resonated coil to augment the difference. The coils may be formed partly by an earth return.
GB2545146A 1946-08-26 1946-08-26 Improvements in or relating to apparatus for detecting the position of vehicles and the like Expired GB627053A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2545146A GB627053A (en) 1946-08-26 1946-08-26 Improvements in or relating to apparatus for detecting the position of vehicles and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2545146A GB627053A (en) 1946-08-26 1946-08-26 Improvements in or relating to apparatus for detecting the position of vehicles and the like

Publications (1)

Publication Number Publication Date
GB627053A true GB627053A (en) 1949-07-27

Family

ID=10227887

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2545146A Expired GB627053A (en) 1946-08-26 1946-08-26 Improvements in or relating to apparatus for detecting the position of vehicles and the like

Country Status (1)

Country Link
GB (1) GB627053A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199329A2 (en) * 1985-04-19 1986-10-29 Omron Tateisi Electronics Co. Vehicle detecting system
US4968979A (en) * 1985-04-19 1990-11-06 Omron Tateisi Electronics Co. Vehicle detecting system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199329A2 (en) * 1985-04-19 1986-10-29 Omron Tateisi Electronics Co. Vehicle detecting system
EP0199329A3 (en) * 1985-04-19 1989-04-05 Omron Tateisi Electronics Co. Vehicle detecting system
US4968979A (en) * 1985-04-19 1990-11-06 Omron Tateisi Electronics Co. Vehicle detecting system

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