JPS56141515A - Displacement measuring device - Google Patents

Displacement measuring device

Info

Publication number
JPS56141515A
JPS56141515A JP4519080A JP4519080A JPS56141515A JP S56141515 A JPS56141515 A JP S56141515A JP 4519080 A JP4519080 A JP 4519080A JP 4519080 A JP4519080 A JP 4519080A JP S56141515 A JPS56141515 A JP S56141515A
Authority
JP
Japan
Prior art keywords
electrodes
electrode
surface wave
elastic surface
velocity
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
JP4519080A
Other languages
Japanese (ja)
Inventor
Minoru Nakagawara
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin 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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP4519080A priority Critical patent/JPS56141515A/en
Publication of JPS56141515A publication Critical patent/JPS56141515A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage

Abstract

PURPOSE:To detect the displacement of an external object in the absence of contact by supporting the relative positions of an energizing member in the axial direction connecting the two receiving electrodes of a piezoelectric member and the opposing surfaces of the piezoelectric member movably according to the displacement of the external object. CONSTITUTION:When a pulse signal ST of a high duty ratio is applied from a pulse signal generating part 3 to an electrode 20 for energizing, an elastic surface wave by electrostrictive effect is produced in the surface of a piezoelectric member 1 opposing to said electrode 20, and this wave propagates at the velocity of sound toward both directions of receiving electrodes 10A, 10B. When it arrives in the positions of the electrodes 10A, 10B, pulse signals RA, RB are obtainable from the electrodes 10A, 10B by electrostrictive effect. The time difference removed of the effect of the velocity of propagation of the elastic surface wave by being calculated from the distance between the electrodes 10A, 10B, the distances between the electrode 20 for energizing and the electrodes 10A, 10B, the velocity of propagation of the elastic surface wave and the time until the elastic surface wave arrives at the electrodes 10A, 10B is obtained as a relation associated only to the relative positions of said electrode 20 and the receiving electrodes 10A, 10B.
JP4519080A 1980-04-08 1980-04-08 Displacement measuring device Pending JPS56141515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4519080A JPS56141515A (en) 1980-04-08 1980-04-08 Displacement measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4519080A JPS56141515A (en) 1980-04-08 1980-04-08 Displacement measuring device

Publications (1)

Publication Number Publication Date
JPS56141515A true JPS56141515A (en) 1981-11-05

Family

ID=12712339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4519080A Pending JPS56141515A (en) 1980-04-08 1980-04-08 Displacement measuring device

Country Status (1)

Country Link
JP (1) JPS56141515A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162825A (en) * 1982-03-23 1983-09-27 Murata Mfg Co Ltd Micro load sensor
WO2020084829A1 (en) * 2018-10-25 2020-04-30 三菱電機株式会社 Electromagnet, electromagnetic switch, and method of manufacturing electromagnet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112148A (en) * 1974-07-22 1976-01-30 Kokusai Electric Co Ltd Idotaino ichisokuteihoho
JPS5136050A (en) * 1974-09-20 1976-03-26 Matsushita Electric Ind Co Ltd HYOMENHAONKYOCHENSOSHI
JPS54115155A (en) * 1978-02-28 1979-09-07 Yokogawa Hokushin Electric Corp Displacement position detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112148A (en) * 1974-07-22 1976-01-30 Kokusai Electric Co Ltd Idotaino ichisokuteihoho
JPS5136050A (en) * 1974-09-20 1976-03-26 Matsushita Electric Ind Co Ltd HYOMENHAONKYOCHENSOSHI
JPS54115155A (en) * 1978-02-28 1979-09-07 Yokogawa Hokushin Electric Corp Displacement position detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58162825A (en) * 1982-03-23 1983-09-27 Murata Mfg Co Ltd Micro load sensor
WO2020084829A1 (en) * 2018-10-25 2020-04-30 三菱電機株式会社 Electromagnet, electromagnetic switch, and method of manufacturing electromagnet

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