GB1431303A - System for thau automatic transfer of information - Google Patents

System for thau automatic transfer of information

Info

Publication number
GB1431303A
GB1431303A GB1160473A GB1160473A GB1431303A GB 1431303 A GB1431303 A GB 1431303A GB 1160473 A GB1160473 A GB 1160473A GB 1160473 A GB1160473 A GB 1160473A GB 1431303 A GB1431303 A GB 1431303A
Authority
GB
United Kingdom
Prior art keywords
responder
signal
frequency
under control
components
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
GB1160473A
Other languages
English (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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1431303A publication Critical patent/GB1431303A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • 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
    • G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/08—Calling by using continuous AC
    • H04Q9/12—Calling by using continuous AC using combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Traffic Control Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Near-Field Transmission Systems (AREA)
GB1160473A 1972-03-15 1973-03-09 System for thau automatic transfer of information Expired GB1431303A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE327972A SE388101B (sv) 1972-03-15 1972-03-15 Anordning for automatisk overforing av information omfattande en informationssokare och en informationsgivare i vilken en informationssoksignal ger upphov till en fran denna utsend informationsberande signal

Publications (1)

Publication Number Publication Date
GB1431303A true GB1431303A (en) 1976-04-07

Family

ID=20261770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1160473A Expired GB1431303A (en) 1972-03-15 1973-03-09 System for thau automatic transfer of information

Country Status (7)

Country Link
DE (1) DE2311948A1 (enrdf_load_stackoverflow)
DK (1) DK134730B (enrdf_load_stackoverflow)
FR (1) FR2176067A1 (enrdf_load_stackoverflow)
GB (1) GB1431303A (enrdf_load_stackoverflow)
NL (1) NL7303279A (enrdf_load_stackoverflow)
NO (1) NO137253C (enrdf_load_stackoverflow)
SE (1) SE388101B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242661A (en) * 1975-03-27 1980-12-30 Stifelsen Institutet for Mikrovagsteknik Vid Tekniska Hogskolan i Stockholm Device for registration of objects
JPS53120295A (en) * 1977-03-30 1978-10-20 Toshiba Corp Subject discrimination device

Also Published As

Publication number Publication date
DE2311948A1 (de) 1973-09-20
DK134730C (enrdf_load_stackoverflow) 1977-05-31
NL7303279A (enrdf_load_stackoverflow) 1973-09-18
FR2176067A1 (enrdf_load_stackoverflow) 1973-10-26
SE388101B (sv) 1976-09-20
NO137253B (no) 1977-10-17
DK134730B (da) 1977-01-03
NO137253C (no) 1978-02-01

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Legal Events

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