JPS6285819A - Displacement detector - Google Patents

Displacement detector

Info

Publication number
JPS6285819A
JPS6285819A JP22658385A JP22658385A JPS6285819A JP S6285819 A JPS6285819 A JP S6285819A JP 22658385 A JP22658385 A JP 22658385A JP 22658385 A JP22658385 A JP 22658385A JP S6285819 A JPS6285819 A JP S6285819A
Authority
JP
Japan
Prior art keywords
magnetostrictive line
magnets
magnet
fixed
ultrasonic
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
JP22658385A
Other languages
Japanese (ja)
Inventor
Kozo Kyoizumi
Original Assignee
Sankyo Boeki Kk
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 Sankyo Boeki Kk filed Critical Sankyo Boeki Kk
Priority to JP22658385A priority Critical patent/JPS6285819A/en
Publication of JPS6285819A publication Critical patent/JPS6285819A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect displacement in a state that there are no restrictions in the approaching distance between two magnets without being influenced by transmission speed of ultrasonic waves by detecting separately ultrasonic signals of the fixed and movable permanent magnets by supply signals of two transmission means.
CONSTITUTION: The movable permanent magnet 2 movable along a magnetostrictive line 1 and the fixed permanent magnet 3 fixed on a prescribed part of the magnetostrictive line 1 are provided. Then, the 1st pulse generator 4 impresses a starting end of the magnetostrictive line 1 with an electric current pulse A1 and the 2nd pulse generator 5 impresses just behind the magnet 3 of the magnetostrictive line 1 with an electric current pulse A2. Further, a distortion detector 6 is provided at the starting end side of the magnetostrictive line 1 and receives the ultrasonic signal transmitting through the magnetostrictive line 1. Then, a signal in connection with transmission time until the detector 6 of an ultrasonic signal produced or reflected on a part of the magnetostrictive line 1 where the magnets 2 and 3 approach is introduced into an arithmetic circuit and the mechanical displacement given to the magnet 3 is calculated. Accordingly, there is no possibility being influenced by the transmission speed of the ultrasonic waves. Further, since a reception means may be provided at only one place, the displacement can be detected without being restricted by an object to be measured.
COPYRIGHT: (C)1987,JPO&Japio
JP22658385A 1985-10-11 1985-10-11 Displacement detector Pending JPS6285819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22658385A JPS6285819A (en) 1985-10-11 1985-10-11 Displacement detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22658385A JPS6285819A (en) 1985-10-11 1985-10-11 Displacement detector

Publications (1)

Publication Number Publication Date
JPS6285819A true JPS6285819A (en) 1987-04-20

Family

ID=16847446

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22658385A Pending JPS6285819A (en) 1985-10-11 1985-10-11 Displacement detector

Country Status (1)

Country Link
JP (1) JPS6285819A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0842467A (en) * 1995-06-23 1996-02-13 Mitsubishi Electric Corp Scroll compressor
JP2011158027A (en) * 2010-02-01 2011-08-18 Santest Co Ltd Fluid pressure actuator which can detect position and load

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0842467A (en) * 1995-06-23 1996-02-13 Mitsubishi Electric Corp Scroll compressor
JP2011158027A (en) * 2010-02-01 2011-08-18 Santest Co Ltd Fluid pressure actuator which can detect position and load

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