JPS55114975A - Information transmission unit - Google Patents

Information transmission unit

Info

Publication number
JPS55114975A
JPS55114975A JP2232279A JP2232279A JPS55114975A JP S55114975 A JPS55114975 A JP S55114975A JP 2232279 A JP2232279 A JP 2232279A JP 2232279 A JP2232279 A JP 2232279A JP S55114975 A JPS55114975 A JP S55114975A
Authority
JP
Japan
Prior art keywords
wave
modulation
responser
periodical
circuit
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.)
Pending
Application number
JP2232279A
Other languages
Japanese (ja)
Inventor
Shinichi Inada
Taiichi Katayama
Shoji Mutsushima
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
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 JAPANESE NATIONAL RAILWAYS<JNR>, Japan National Railways, Mitsubishi Electric Corp filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP2232279A priority Critical patent/JPS55114975A/en
Publication of JPS55114975A publication Critical patent/JPS55114975A/en
Pending 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
    • G01S13/74—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

Landscapes

  • Engineering & Computer Science (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

PURPOSE:To improve the power use efficiency in a responser and stability of the frequency by switching frequencies of an incorporated two-wave switching oscillator correspondingly to the binary code. CONSTITUTION:In transmission part 1 of interrogator 101, the carrier wave is transmitted with periodical break for a minute time by periodical timing generation circuit 8 and transmission modulation circuit 9. Moving responser 102 converts the receiving signal to a DC in 12 to supply power to respective parts. Sequence unit 13 reads out binary memory contents from memory unit 14 and makes them into a code string and subjects the frequency of modulation wave oscillator 18 to FSK with a unit time width by switching circuit 19. Timing of circuits 13 and 19 are obtained by detecting periodical break of the input radio wave by 20. The radio wave for response is radiated again by radio-repeating the receiving input as it is, however, it is mixed with the modulation wave halfway in modulation circuit 15. In the interrogator, the part changed by modulation is detected by 4, and the binary code string which the responser has is read through FSK demodulation 7 and decoding 5.
JP2232279A 1979-02-27 1979-02-27 Information transmission unit Pending JPS55114975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2232279A JPS55114975A (en) 1979-02-27 1979-02-27 Information transmission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2232279A JPS55114975A (en) 1979-02-27 1979-02-27 Information transmission unit

Publications (1)

Publication Number Publication Date
JPS55114975A true JPS55114975A (en) 1980-09-04

Family

ID=12079475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2232279A Pending JPS55114975A (en) 1979-02-27 1979-02-27 Information transmission unit

Country Status (1)

Country Link
JP (1) JPS55114975A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04315081A (en) * 1991-01-04 1992-11-06 Csir Identification device
US5451958A (en) * 1993-05-21 1995-09-19 Texas Instruments Deutschland Gmbh Dual standard RF-ID system
JP2007024892A (en) * 2005-07-14 2007-02-01 Biosense Webster Inc Wireless position transducer using digital signal system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04315081A (en) * 1991-01-04 1992-11-06 Csir Identification device
US5451958A (en) * 1993-05-21 1995-09-19 Texas Instruments Deutschland Gmbh Dual standard RF-ID system
EP0693695A1 (en) * 1993-05-21 1996-01-24 Texas Instruments Deutschland Gmbh Dual standard radio frequency identification system
JP2007024892A (en) * 2005-07-14 2007-02-01 Biosense Webster Inc Wireless position transducer using digital signal system
US8730011B2 (en) 2005-07-14 2014-05-20 Biosense Webster, Inc. Wireless position transducer with digital signaling

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