JPS5636002A - Fine displacement detector - Google Patents

Fine displacement detector

Info

Publication number
JPS5636002A
JPS5636002A JP11151979A JP11151979A JPS5636002A JP S5636002 A JPS5636002 A JP S5636002A JP 11151979 A JP11151979 A JP 11151979A JP 11151979 A JP11151979 A JP 11151979A JP S5636002 A JPS5636002 A JP S5636002A
Authority
JP
Japan
Prior art keywords
pair
oscillators
outputs
subject
differentially
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
JP11151979A
Other languages
Japanese (ja)
Inventor
Hiromi Ogasawara
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP11151979A priority Critical patent/JPS5636002A/en
Publication of JPS5636002A publication Critical patent/JPS5636002A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE: To obtain an accurate measurement output by providing a pair of variable capacitors differentially responding to mechanical displacement of a subject provided in combination with a pair of qualtz oscillators.
CONSTITUTION: A pair of fixed electrodes Ef1 and Ef2 are provided and a movable electrode Ev is connected to the subject placed between the electrodes. A pair of variable condensers C1 and C2 differentially responding to mechanical displacement of the subject are connected to a pair of qualtz oscillators Xtal1 and Xtal2 to form two outputs both differentially varying in the frequency. A pair of mixers MIX1 and MIX2 are provided to form a locally emitted frequency signal for each of the two outputs from the oscillators, and the outputs thereof are converted with a pair of converters FV1 and FV2, the output of which is detected in the difference by a circuit DEF.
COPYRIGHT: (C)1981,JPO&Japio
JP11151979A 1979-08-31 1979-08-31 Fine displacement detector Pending JPS5636002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11151979A JPS5636002A (en) 1979-08-31 1979-08-31 Fine displacement detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11151979A JPS5636002A (en) 1979-08-31 1979-08-31 Fine displacement detector

Publications (1)

Publication Number Publication Date
JPS5636002A true JPS5636002A (en) 1981-04-09

Family

ID=14563373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11151979A Pending JPS5636002A (en) 1979-08-31 1979-08-31 Fine displacement detector

Country Status (1)

Country Link
JP (1) JPS5636002A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004076967A1 (en) * 2003-02-28 2004-09-10 Oht Inc. Conductor position inspecting device and conductor position inspecting method
WO2004076966A1 (en) * 2003-02-28 2004-09-10 Oht Inc. Conductor inspecting device and conductor inspecting method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109297A (en) * 1961-09-20 1963-11-05 Gen Electric Rotary compressor injection cooling arrangement
JPS5187808A (en) * 1975-01-27 1976-07-31 Lennox Ind Inc
JPS5569372A (en) * 1978-11-20 1980-05-24 Goro Shimada Gas reducing valve combined with earthquake-proof automatic shut-off mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3109297A (en) * 1961-09-20 1963-11-05 Gen Electric Rotary compressor injection cooling arrangement
JPS5187808A (en) * 1975-01-27 1976-07-31 Lennox Ind Inc
JPS5569372A (en) * 1978-11-20 1980-05-24 Goro Shimada Gas reducing valve combined with earthquake-proof automatic shut-off mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004076967A1 (en) * 2003-02-28 2004-09-10 Oht Inc. Conductor position inspecting device and conductor position inspecting method
WO2004076966A1 (en) * 2003-02-28 2004-09-10 Oht Inc. Conductor inspecting device and conductor inspecting method
US7332914B2 (en) 2003-02-28 2008-02-19 Oht Inc. Conductor inspection apparatus and conductor inspection method

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