JPS57173701A - Eddy current type device and method for measuring rail displacement - Google Patents

Eddy current type device and method for measuring rail displacement

Info

Publication number
JPS57173701A
JPS57173701A JP5919181A JP5919181A JPS57173701A JP S57173701 A JPS57173701 A JP S57173701A JP 5919181 A JP5919181 A JP 5919181A JP 5919181 A JP5919181 A JP 5919181A JP S57173701 A JPS57173701 A JP S57173701A
Authority
JP
Japan
Prior art keywords
rail
coil
coils
gap
average
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.)
Granted
Application number
JP5919181A
Other languages
Japanese (ja)
Other versions
JPS6344161B2 (en
Inventor
Yasushi Shirota
Hiroshi Ito
Makio Kamiya
Yukio Takino
Kanji Matsuhashi
Hiroshi Imaike
Kiyohisa Nakamura
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Shinkawa Electric Co Ltd
Nippon Kokuyu Tetsudo
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Shinkawa Electric Co Ltd
Nippon Kokuyu Tetsudo
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 JAPANESE NATIONAL RAILWAYS<JNR>, Japan National Railways, Shinkawa Electric Co Ltd, Nippon Kokuyu Tetsudo filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP5919181A priority Critical patent/JPS57173701A/en
Publication of JPS57173701A publication Critical patent/JPS57173701A/en
Publication of JPS6344161B2 publication Critical patent/JPS6344161B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE:To detect the central position of the rail accurately in the eddy current type rail displacement measurement, by using the average of the outputs of a pair of polygonally shaped detecting coils facing opposite to the rail, and compensating the variation in the distance from the wheel tread of the rail. CONSTITUTION:Triangular coils 6 and 7 are mounted on the lower part of a measuring car running on the rails so as to face the rail 3. Since the impedance of the coil is a function of the distance between the rail and the coil, the output, which corresponds to the displacement in the gap between the tread of the rail and the coil and in the span in the right and left directions of the rails, can be detected when a high frequency current is flowed in the detecting coils. When the rectangular coils are used, the detection can be performed in the broad range with excellent linearity. The average of the output of a pair of the coils indicates said gap. Therefore, when the coil output is compensated by the difference between said average and a reference value, the accurate measurement can be performed even though said gap is varied.
JP5919181A 1981-04-21 1981-04-21 Eddy current type device and method for measuring rail displacement Granted JPS57173701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5919181A JPS57173701A (en) 1981-04-21 1981-04-21 Eddy current type device and method for measuring rail displacement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5919181A JPS57173701A (en) 1981-04-21 1981-04-21 Eddy current type device and method for measuring rail displacement

Publications (2)

Publication Number Publication Date
JPS57173701A true JPS57173701A (en) 1982-10-26
JPS6344161B2 JPS6344161B2 (en) 1988-09-02

Family

ID=13106271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5919181A Granted JPS57173701A (en) 1981-04-21 1981-04-21 Eddy current type device and method for measuring rail displacement

Country Status (1)

Country Link
JP (1) JPS57173701A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124309U (en) * 1983-02-10 1984-08-21 芝浦メカトロニクス株式会社 Rail position detection device
DE3538349A1 (en) * 1984-11-15 1986-07-10 S.I.E.T.T.E. S.p.A., Florenz/Firence DEVICE FOR DETERMINING THE GROUND CLEARANCE OF A VEHICLE
JPS61250501A (en) * 1985-04-27 1986-11-07 Universal Kiki Kk Apparatus for measuring deflection of third track
JPS648U (en) * 1987-06-20 1989-01-05
FR2621114A1 (en) * 1987-09-28 1989-03-31 Alsthom DEVICE FOR THE NON-CONTACT MEASUREMENT OF THE POSITION OF A FIRST PART IN RELATION TO A SECOND PART
FR2630204A1 (en) * 1988-04-18 1989-10-20 Alsthom POSITION SENSOR
DE4231346A1 (en) * 1992-09-18 1994-03-24 Siemens Ag Individual wheel control arrangement for rail vehicles - has one or more inductive sensors per wheel and associated computing circuitry
US6714004B2 (en) * 2000-05-24 2004-03-30 Balluff Gmbh Inductive position measuring system
US6791319B2 (en) * 2002-01-17 2004-09-14 Marktec Corporation Eddy current probe with transverse polygonal detecting coil
US6995556B2 (en) * 2002-07-23 2006-02-07 Ensco, Inc. Electromagnetic gage sensing system and method for railroad track inspection
JP2008129025A (en) * 2006-11-22 2008-06-05 Cherry Gmbh Inductive type position measurement instrument or angle measurement instrument
JP2008241322A (en) * 2007-03-26 2008-10-09 Hitachi High-Technologies Corp Track inspection car
JP2008241307A (en) * 2007-03-26 2008-10-09 Hitachi High-Technologies Corp Rail height detecting method, rail height detecting mechanism, and rail height displacement measuring device
JP2011208967A (en) * 2010-03-29 2011-10-20 Nippo Corp Positioning device
CN102928066A (en) * 2012-11-19 2013-02-13 上海海事大学 Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor
JP2014190711A (en) * 2013-03-26 2014-10-06 Smc Corp Displacement sensor
JP2017187384A (en) * 2016-04-06 2017-10-12 新川センサテクノロジ株式会社 Rail wear measuring method using eddy current type sensor, and measuring apparatus therefor
WO2018003460A1 (en) * 2016-06-28 2018-01-04 株式会社日立ハイテクファインシステムズ Rail inspection system
JP2018081035A (en) * 2016-11-17 2018-05-24 新川センサテクノロジ株式会社 Eddy current type sensor of open type coil and rail displacement measuring method using the same
CN113932716A (en) * 2021-11-11 2022-01-14 四川九洲电器集团有限责任公司 Large-scale motor coil detection device and detection method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4784U (en) * 1970-07-17 1972-02-23
JPS5341982A (en) * 1976-09-29 1978-04-15 Hitachi Ltd Wafer holder for ion implantation processing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4784U (en) * 1970-07-17 1972-02-23
JPS5341982A (en) * 1976-09-29 1978-04-15 Hitachi Ltd Wafer holder for ion implantation processing

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124309U (en) * 1983-02-10 1984-08-21 芝浦メカトロニクス株式会社 Rail position detection device
DE3538349A1 (en) * 1984-11-15 1986-07-10 S.I.E.T.T.E. S.p.A., Florenz/Firence DEVICE FOR DETERMINING THE GROUND CLEARANCE OF A VEHICLE
JPS61250501A (en) * 1985-04-27 1986-11-07 Universal Kiki Kk Apparatus for measuring deflection of third track
JPS648U (en) * 1987-06-20 1989-01-05
FR2621114A1 (en) * 1987-09-28 1989-03-31 Alsthom DEVICE FOR THE NON-CONTACT MEASUREMENT OF THE POSITION OF A FIRST PART IN RELATION TO A SECOND PART
US4912406A (en) * 1987-09-28 1990-03-27 Alsthom Device for determining position of a railway vehicle by measuring deviation in position of a magnet
FR2630204A1 (en) * 1988-04-18 1989-10-20 Alsthom POSITION SENSOR
DE4231346A1 (en) * 1992-09-18 1994-03-24 Siemens Ag Individual wheel control arrangement for rail vehicles - has one or more inductive sensors per wheel and associated computing circuitry
US6714004B2 (en) * 2000-05-24 2004-03-30 Balluff Gmbh Inductive position measuring system
US6791319B2 (en) * 2002-01-17 2004-09-14 Marktec Corporation Eddy current probe with transverse polygonal detecting coil
US6995556B2 (en) * 2002-07-23 2006-02-07 Ensco, Inc. Electromagnetic gage sensing system and method for railroad track inspection
JP2008129025A (en) * 2006-11-22 2008-06-05 Cherry Gmbh Inductive type position measurement instrument or angle measurement instrument
JP2008241322A (en) * 2007-03-26 2008-10-09 Hitachi High-Technologies Corp Track inspection car
JP2008241307A (en) * 2007-03-26 2008-10-09 Hitachi High-Technologies Corp Rail height detecting method, rail height detecting mechanism, and rail height displacement measuring device
JP2011208967A (en) * 2010-03-29 2011-10-20 Nippo Corp Positioning device
CN102928066A (en) * 2012-11-19 2013-02-13 上海海事大学 Bridge amplitude detection device and bridge amplitude detection method based on triangular amplitude detection sensor
JP2014190711A (en) * 2013-03-26 2014-10-06 Smc Corp Displacement sensor
JP2017187384A (en) * 2016-04-06 2017-10-12 新川センサテクノロジ株式会社 Rail wear measuring method using eddy current type sensor, and measuring apparatus therefor
WO2018003460A1 (en) * 2016-06-28 2018-01-04 株式会社日立ハイテクファインシステムズ Rail inspection system
JP2018004295A (en) * 2016-06-28 2018-01-11 株式会社日立ハイテクファインシステムズ Rail inspection system
US10739311B2 (en) 2016-06-28 2020-08-11 Hitachi High-Tech Fine Systems Corporation Rail inspection system
JP2018081035A (en) * 2016-11-17 2018-05-24 新川センサテクノロジ株式会社 Eddy current type sensor of open type coil and rail displacement measuring method using the same
CN113932716A (en) * 2021-11-11 2022-01-14 四川九洲电器集团有限责任公司 Large-scale motor coil detection device and detection method

Also Published As

Publication number Publication date
JPS6344161B2 (en) 1988-09-02

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