FR2251135A1 - Radio signal transmission system - has an interrogation station delivering an H.F. interrogation signal and an answering station - Google Patents

Radio signal transmission system - has an interrogation station delivering an H.F. interrogation signal and an answering station

Info

Publication number
FR2251135A1
FR2251135A1 FR7437382A FR7437382A FR2251135A1 FR 2251135 A1 FR2251135 A1 FR 2251135A1 FR 7437382 A FR7437382 A FR 7437382A FR 7437382 A FR7437382 A FR 7437382A FR 2251135 A1 FR2251135 A1 FR 2251135A1
Authority
FR
France
Prior art keywords
interrogation
station
signal
answering
transmission system
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
FR7437382A
Other languages
French (fr)
Other versions
FR2251135B1 (en
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.)
OLSSON KJELL SW
Original Assignee
OLSSON KJELL SW
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 OLSSON KJELL SW filed Critical OLSSON KJELL SW
Publication of FR2251135A1 publication Critical patent/FR2251135A1/en
Application granted granted Critical
Publication of FR2251135B1 publication Critical patent/FR2251135B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
    • B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
    • B61L3/125—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using short-range radio transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/04—Indicating or recording train identities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/04—Indicating or recording train identities
    • B61L25/045—Indicating or recording train identities using reradiating tags
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/758—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The answering station receives the interrogation signal and sends back a correspondingly modified h.f. reply signal contng. the information to be transmitted to the interrogation station. The interrogation signal is a continuous or pulsating h.f. signal, and the reply signal is a harmonic of the interrogation signal, to which a receiver in the interrogation station is tuned. The answering station has a non-linear component to which the interrogation signal is applied. It derives from it the harmonic sent back to the interrogation station after modulation in a modulator controlled by a coding unit, so that the reply signal has the form of a modulated pulse train. Supply voltage for the coding unit is obtained by rectification of the interrogation signal which supplies all the necessary energy for the reply signal modulation and sending back.
FR7437382A 1973-11-13 1974-11-13 Radio signal transmission system - has an interrogation station delivering an H.F. interrogation signal and an answering station Granted FR2251135A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7315348A SE380220B (en) 1973-11-13 1973-11-13 INFORMATION TRANSMISSION SYSTEM FOR WIRELESS TRANSMISSION WITH A QUESTION STATION AND AN ANSWER

Publications (2)

Publication Number Publication Date
FR2251135A1 true FR2251135A1 (en) 1975-06-06
FR2251135B1 FR2251135B1 (en) 1979-05-25

Family

ID=20319090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7437382A Granted FR2251135A1 (en) 1973-11-13 1974-11-13 Radio signal transmission system - has an interrogation station delivering an H.F. interrogation signal and an answering station

Country Status (6)

Country Link
CA (1) CA1037124A (en)
DE (1) DE2453647A1 (en)
DK (1) DK587674A (en)
FR (1) FR2251135A1 (en)
NO (1) NO743872L (en)
SE (1) SE380220B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003566A1 (en) * 1983-03-03 1984-09-13 Juergen Machate Device for contactless interrogation of a data support
FR2544867A1 (en) * 1983-04-21 1984-10-26 Intellitech Corp METHOD AND DEVICE FOR LOCALIZATION, IDENTIFICATION, DISPLACEMENT MEASUREMENT, INVENTORY, ANALYSIS, CONTROL, GUIDANCE AND SORTING OF OBJECTS

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009179A1 (en) * 1980-03-11 1981-09-24 Brown, Boveri & Cie Ag, 6800 Mannheim METHOD AND DEVICE FOR GENERATING THE REPLY SIGNAL OF A DEVICE FOR AUTOMATICALLY IDENTIFYING OBJECTS AND / OR LIVING BEINGS
ZA829121B (en) * 1981-12-18 1983-09-28 Senelco Ltd Transmitter/responder systems
GB2112607B (en) * 1981-12-18 1986-01-02 Senelco Ltd Transmitter/responder systems
DE3242978A1 (en) * 1982-11-20 1984-05-24 Diehl GmbH & Co, 8500 Nürnberg Remote-control device, especially for controlling the comfort influences in the seating region in the cabins of high-capacity commercial aircraft
SE500030C2 (en) * 1990-05-14 1994-03-21 Bengt Henoch Procedure for storing complicated product life data

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003566A1 (en) * 1983-03-03 1984-09-13 Juergen Machate Device for contactless interrogation of a data support
FR2544867A1 (en) * 1983-04-21 1984-10-26 Intellitech Corp METHOD AND DEVICE FOR LOCALIZATION, IDENTIFICATION, DISPLACEMENT MEASUREMENT, INVENTORY, ANALYSIS, CONTROL, GUIDANCE AND SORTING OF OBJECTS

Also Published As

Publication number Publication date
CA1037124A (en) 1978-08-22
DK587674A (en) 1975-07-07
SE7315348L (en) 1975-05-14
DE2453647A1 (en) 1975-05-15
FR2251135B1 (en) 1979-05-25
SE380220B (en) 1975-11-03
NO743872L (en) 1975-06-09

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Legal Events

Date Code Title Description
ST Notification of lapse