JPS5448497A - Identifying unit for object - Google Patents

Identifying unit for object

Info

Publication number
JPS5448497A
JPS5448497A JP11544977A JP11544977A JPS5448497A JP S5448497 A JPS5448497 A JP S5448497A JP 11544977 A JP11544977 A JP 11544977A JP 11544977 A JP11544977 A JP 11544977A JP S5448497 A JPS5448497 A JP S5448497A
Authority
JP
Japan
Prior art keywords
coil
detection coil
stable
manufacturing
constituting
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
JP11544977A
Other languages
Japanese (ja)
Inventor
Ryosuke Sato
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.)
Nippon Signal Co Ltd
Original Assignee
Nippon Signal Co 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 Nippon Signal Co Ltd filed Critical Nippon Signal Co Ltd
Priority to JP11544977A priority Critical patent/JPS5448497A/en
Publication of JPS5448497A publication Critical patent/JPS5448497A/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

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 establish the object identifying unit which is easy for the manufacturing of detection coil and stable in the operation, by constituting the oscillation circuit through the use of the detection coil of two terminal circuit and the negative impedance conversion circuit. CONSTITUTION:Resistors R1 and R2 are connected to the operational amplifier OA, constituting negative impedance conversion unit Nic and the impedance Zo(Ro, Xo) is connected. When Xo is only inductance Lo, f-Xin represents linear relation. The relation of X-f of the detection coil DC is greatly varied around the resonant frequency of when the coupling coefficient K of the identified object to the resonance coil is increased 0<K1...<K3. If K<=K2, since the negative resistance satisfying the oscillation condition and amplitude condition in f1 and f2 is of current type, f1 is oscillated. The oscillated output is detected via BPF and amplified, and the object adding the resonant coil can be identified with the operation of a relay. This unit imploys one coil, then manufacturing is easy and the operation is stable.
JP11544977A 1977-09-26 1977-09-26 Identifying unit for object Pending JPS5448497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11544977A JPS5448497A (en) 1977-09-26 1977-09-26 Identifying unit for object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11544977A JPS5448497A (en) 1977-09-26 1977-09-26 Identifying unit for object

Publications (1)

Publication Number Publication Date
JPS5448497A true JPS5448497A (en) 1979-04-17

Family

ID=14662818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11544977A Pending JPS5448497A (en) 1977-09-26 1977-09-26 Identifying unit for object

Country Status (1)

Country Link
JP (1) JPS5448497A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04242910A (en) * 1990-10-22 1992-08-31 Mitsubishi Electric Corp Resin-mold type current transformer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124214A (en) * 1975-04-23 1976-10-29 Kyosan Electric Mfg Co Ltd Point control type signal selecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51124214A (en) * 1975-04-23 1976-10-29 Kyosan Electric Mfg Co Ltd Point control type signal selecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04242910A (en) * 1990-10-22 1992-08-31 Mitsubishi Electric Corp Resin-mold type current transformer

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