GB1449047A - Transmitter checking apparatus - Google Patents

Transmitter checking apparatus

Info

Publication number
GB1449047A
GB1449047A GB5488173A GB5488173A GB1449047A GB 1449047 A GB1449047 A GB 1449047A GB 5488173 A GB5488173 A GB 5488173A GB 5488173 A GB5488173 A GB 5488173A GB 1449047 A GB1449047 A GB 1449047A
Authority
GB
United Kingdom
Prior art keywords
vehicle
circuit
transponder
latch circuit
monostable
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
GB5488173A
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB5488173A priority Critical patent/GB1449047A/en
Publication of GB1449047A publication Critical patent/GB1449047A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096783—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

1449047 Road-traffic signalling NATIONAL RESEARCH DEVELOPMENT CORP 22 Nov 1974 [27 Nov 1973] 54881/73 Heading G4Q When a transmitting vehicle passing along a route 11 is detected and continues on to pass a receiver 13, 25, logic means checks the output of the receiver, when the object has been detected by means 12, 16, to determine whether signals are being received from the transmitter on the vehicle and/or whether such signals are in a predetermined form, The vehicle carries a transponder powered by radiation from a loop 14 and (whilst in the vicinity of loops 12, 14) repeatedly emits a signal of binary code unique to that vehicle as in Specification 1,187,130 (Divisions H3-H5) and any correct code triggers a monostable 17 to its unstable state to apply a positive pulse to a latch circuit 18 which has a specified truth table. When the vehicle passes over loop 13 a monostable 26 passes a positive pulse to AND gate 24 and a delay circuit 22. A second latch circuit 27 has the same truth table as latch circuit 18; the circuit arrangement is such that a vehicle without a transponder, or with a faulty transponder, causes a generator 28 to be triggered. Circuit 27 is reset by an input (B) effected by an operator after hearing a tone.
GB5488173A 1973-11-27 1973-11-27 Transmitter checking apparatus Expired GB1449047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5488173A GB1449047A (en) 1973-11-27 1973-11-27 Transmitter checking apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5488173A GB1449047A (en) 1973-11-27 1973-11-27 Transmitter checking apparatus

Publications (1)

Publication Number Publication Date
GB1449047A true GB1449047A (en) 1976-09-08

Family

ID=10472344

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5488173A Expired GB1449047A (en) 1973-11-27 1973-11-27 Transmitter checking apparatus

Country Status (1)

Country Link
GB (1) GB1449047A (en)

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Legal Events

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