JPS57203913A - Rotation detector - Google Patents

Rotation detector

Info

Publication number
JPS57203913A
JPS57203913A JP8915581A JP8915581A JPS57203913A JP S57203913 A JPS57203913 A JP S57203913A JP 8915581 A JP8915581 A JP 8915581A JP 8915581 A JP8915581 A JP 8915581A JP S57203913 A JPS57203913 A JP S57203913A
Authority
JP
Japan
Prior art keywords
rotation
permanent magnet
rotating body
induced
voltage
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
JP8915581A
Other languages
Japanese (ja)
Inventor
Isao Sato
Toshinosuke Onodera
Michio Kai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP8915581A priority Critical patent/JPS57203913A/en
Publication of JPS57203913A publication Critical patent/JPS57203913A/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
    • G01D5/20—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 by varying inductance, e.g. by a movable armature
    • G01D5/2006—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 by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To obtain means to detect the direction of rotation with a rotation detector by recognizing the shape of voltage induction due to rotation of a permanent magnet developed in the coil of a magnetism detection element. CONSTITUTION:A rotating body 1 is rotated with a permanent magnet 2 attached on its outer circumference. With the change in the magnetic flux that is developed by the rotation of the permanent magnet 2, an induction voltage is generated at both ends of a coil 4b by means of an iron core 4a of a magnetic detecting element 4 that is provided on the circumference of a fixed frame 3. Everytime the permanent magnet 2 passes near the element 4 once, a group of +, -, and + voltages are induced. When the rotating body 1 is rotated in the opposite direction, the order of the induced voltages changes to -, +, and - which allows detection of the rotational direction. Further, the number of rotation of the rotating body 1 is counted by counting the frequency of the induced voltage.
JP8915581A 1981-06-10 1981-06-10 Rotation detector Pending JPS57203913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8915581A JPS57203913A (en) 1981-06-10 1981-06-10 Rotation detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8915581A JPS57203913A (en) 1981-06-10 1981-06-10 Rotation detector

Publications (1)

Publication Number Publication Date
JPS57203913A true JPS57203913A (en) 1982-12-14

Family

ID=13962954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8915581A Pending JPS57203913A (en) 1981-06-10 1981-06-10 Rotation detector

Country Status (1)

Country Link
JP (1) JPS57203913A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993786A (en) * 1982-11-20 1984-05-30 Kyokado Eng Co Ltd Grauting method into ground
JPS5993787A (en) * 1982-11-20 1984-05-30 Kyokado Eng Co Ltd Solidification of ground
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
JPS6453114A (en) * 1987-08-24 1989-03-01 Mitsubishi Electric Corp Multiple rotation detecting device
US5233293A (en) * 1990-11-17 1993-08-03 August Bilstein Gmbh & Co. Kg Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber
KR100851244B1 (en) 2008-04-10 2008-08-08 (주)한국건설안전진단 Safety check-up facilities of steel box slab section of bridge
KR100861315B1 (en) 2008-04-08 2008-10-01 (주)한국건설안전진단 Safety diagnosis apparatus of bridge railing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993786A (en) * 1982-11-20 1984-05-30 Kyokado Eng Co Ltd Grauting method into ground
JPS5993787A (en) * 1982-11-20 1984-05-30 Kyokado Eng Co Ltd Solidification of ground
JPH0222115B2 (en) * 1982-11-20 1990-05-17 Kyokado Eng Co
US4719419A (en) * 1985-07-15 1988-01-12 Harris Graphics Corporation Apparatus for detecting a rotary position of a shaft
JPS6453114A (en) * 1987-08-24 1989-03-01 Mitsubishi Electric Corp Multiple rotation detecting device
US5233293A (en) * 1990-11-17 1993-08-03 August Bilstein Gmbh & Co. Kg Sensor for measuring the speed and/or position of a piston in relation to that of the cylinder it moves inside of in a dashpot or shock absorber
KR100861315B1 (en) 2008-04-08 2008-10-01 (주)한국건설안전진단 Safety diagnosis apparatus of bridge railing
KR100851244B1 (en) 2008-04-10 2008-08-08 (주)한국건설안전진단 Safety check-up facilities of steel box slab section of bridge

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