JPS5582012A - Displacement meter of eddy current type - Google Patents

Displacement meter of eddy current type

Info

Publication number
JPS5582012A
JPS5582012A JP15515878A JP15515878A JPS5582012A JP S5582012 A JPS5582012 A JP S5582012A JP 15515878 A JP15515878 A JP 15515878A JP 15515878 A JP15515878 A JP 15515878A JP S5582012 A JPS5582012 A JP S5582012A
Authority
JP
Japan
Prior art keywords
detection coil
displacement meter
eddy current
coil
current type
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
JP15515878A
Other languages
Japanese (ja)
Other versions
JPH0219401B2 (en
Inventor
Kanji Matsuhashi
Kiyohisa Nakamura
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.)
Shinkawa Electric Co Ltd
Original Assignee
Shinkawa Electric 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 Shinkawa Electric Co Ltd filed Critical Shinkawa Electric Co Ltd
Priority to JP15515878A priority Critical patent/JPS5582012A/en
Publication of JPS5582012A publication Critical patent/JPS5582012A/en
Publication of JPH0219401B2 publication Critical patent/JPH0219401B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE: To establish the eddy current type displacement meter without being subjected to the effect of external noise, by connecting the conversion of the displacement meter consisting of crystal oscillator and constant voltage error detection amplifier to the detection coil with the three equal length coaxial cables.
CONSTITUTION: The coil L of the T-type circuit is the detection coil for the displacement meter, and the capacitor C1 is the resonance capacitor. If the measured object is not near the detection coil L, the frequency is almost turned to the oscillation frequency of the crystal oscillator 1. When the measured metal approaches the detection coil L, the inductance of the detection coil L is changed and the parallel resornance impedance of the resonant circuits C1, L is changed, In this case, the coaxial cables W1, W2, W3 are not the resonance element and the signal attenuation only is obtained, then the detection coil A and the conversion B can be detached from the coaxial cable. Accordingly, no power supply is required for a hazardous place and the effect of external noise can be avoided.
COPYRIGHT: (C)1980,JPO&Japio
JP15515878A 1978-12-14 1978-12-14 Displacement meter of eddy current type Granted JPS5582012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15515878A JPS5582012A (en) 1978-12-14 1978-12-14 Displacement meter of eddy current type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15515878A JPS5582012A (en) 1978-12-14 1978-12-14 Displacement meter of eddy current type

Publications (2)

Publication Number Publication Date
JPS5582012A true JPS5582012A (en) 1980-06-20
JPH0219401B2 JPH0219401B2 (en) 1990-05-01

Family

ID=15599786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15515878A Granted JPS5582012A (en) 1978-12-14 1978-12-14 Displacement meter of eddy current type

Country Status (1)

Country Link
JP (1) JPS5582012A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182102U (en) * 1982-05-31 1983-12-05 日本原子力事業株式会社 Detection coil for eddy current testing equipment
RU2487314C1 (en) * 2011-12-23 2013-07-10 Открытое акционерное общество "Научно-исследовательский институт физических измерений" Vortex-current displacement transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182102U (en) * 1982-05-31 1983-12-05 日本原子力事業株式会社 Detection coil for eddy current testing equipment
RU2487314C1 (en) * 2011-12-23 2013-07-10 Открытое акционерное общество "Научно-исследовательский институт физических измерений" Vortex-current displacement transducer

Also Published As

Publication number Publication date
JPH0219401B2 (en) 1990-05-01

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