JPS5627602A - Magnetic scale - Google Patents

Magnetic scale

Info

Publication number
JPS5627602A
JPS5627602A JP10360279A JP10360279A JPS5627602A JP S5627602 A JPS5627602 A JP S5627602A JP 10360279 A JP10360279 A JP 10360279A JP 10360279 A JP10360279 A JP 10360279A JP S5627602 A JPS5627602 A JP S5627602A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic mark
high frequency
mark
coils
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
JP10360279A
Other languages
Japanese (ja)
Inventor
Kiyoshi Inoue
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.)
Inoue Japax Research Inc
Original Assignee
Inoue Japax Research Inc
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 Inoue Japax Research Inc filed Critical Inoue Japax Research Inc
Priority to JP10360279A priority Critical patent/JPS5627602A/en
Priority to DE8080302815T priority patent/DE3069509D1/en
Priority to EP19800302815 priority patent/EP0027308B1/en
Publication of JPS5627602A publication Critical patent/JPS5627602A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To accomplish accurate reading of the magnetic mark of a magnetic scale by detecting with a head a high frequency AC output of an ultrasonic area between a recording medium given a magnetic mark and a magnetic mark detection head.
CONSTITUTION: A high frequency power source 54 drives magnetostrictive vibration coils 52 and 52' through an arithmetic circuit 56 and a servo circuit 59 to generate a fixed amplitude of magnetostrictive vibration in leg sections 51-2 and 51-2' of a core 51. The magnetic fields generated in coils 51-2 and 51-2' invariably cancels each other in a main working section 51. But, when a magnetic mark exists between a pair of detection terminals 51-3 and 51-3', an output signal from a detection coil 53 activates an up/down counter 58 to indicate a tape position through a preamplifier 55 and an arithmetic circuit 56. This allows accurate reading of the magnetic mark of the magnetic scale.
COPYRIGHT: (C)1981,JPO&Japio
JP10360279A 1979-08-16 1979-08-16 Magnetic scale Pending JPS5627602A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10360279A JPS5627602A (en) 1979-08-16 1979-08-16 Magnetic scale
DE8080302815T DE3069509D1 (en) 1979-08-16 1980-08-15 Manufacture and use of magnetic scale systems
EP19800302815 EP0027308B1 (en) 1979-08-16 1980-08-15 Manufacture and use of magnetic scale systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10360279A JPS5627602A (en) 1979-08-16 1979-08-16 Magnetic scale

Publications (1)

Publication Number Publication Date
JPS5627602A true JPS5627602A (en) 1981-03-18

Family

ID=14358311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10360279A Pending JPS5627602A (en) 1979-08-16 1979-08-16 Magnetic scale

Country Status (1)

Country Link
JP (1) JPS5627602A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62136524U (en) * 1986-02-17 1987-08-28
JPS63256705A (en) * 1987-04-07 1988-10-24 株式会社　アズマ Wig

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62136524U (en) * 1986-02-17 1987-08-28
JPH047143Y2 (en) * 1986-02-17 1992-02-26
JPS63256705A (en) * 1987-04-07 1988-10-24 株式会社　アズマ Wig

Similar Documents

Publication Publication Date Title
IT1194275B (en) "CONTACTLESS" HIGH THICKNESS GAUGE FOR METAL MATERIALS ABOVE CURIE TEMPERATURE
DE3067910D1 (en) Method and apparatus for testing metal tapes
JPS5627602A (en) Magnetic scale
JPS548585A (en) Magnetic field generator for measuring instruments applying electromagnetic ultrasonic waves
JPS6438615A (en) Converter for mechanocardiogram
GB844081A (en) Transducer for static sensing of magnetic records
JPS56147086A (en) Flux gate type magnetic sensor
SU1093886A1 (en) Converter for electromagnetic thickness gauge
DE3783869D1 (en) FLOW-COMPENSATED CURRENT TRANSFORMER.
SU629516A1 (en) Magnetic field parameter measuring device
JPS53101411A (en) Mr type magnetic head
SU648849A1 (en) Low-frequency vibration meter
SE8301527D0 (en) MAGNETOELASTIC POWER
JPS5740606A (en) Bearing indicator
SU728100A1 (en) Magnetic disc magnetic parameter measuring device
SU879280A1 (en) Device for measuring lengthy article diameter
FR2378270A1 (en) Measurement of stress in ferromagnetic material - using electromagnetic collector, not in direct contact with material, with two prim. and two sec. windings
SU815685A1 (en) Magnetic induction measuring device
JPS57161631A (en) Detecting device for surface stress
RU1835557C (en) No-shaft appliance for magnetic tape line speed stabilization
JPS554582A (en) Detector for magnetic scale
FR2303299A1 (en) Magnetic susceptibility sensor for geophysical applications - has detection coil placed between two AC excited windings and connected in an inductance bridge network
SU1149728A2 (en) ANGULAR SPEED METER
JPS5774807A (en) Reproducing method of magnetic recording signal
JPS55108924A (en) Inspection method for floating quantity of magnetic head