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JPS57151850A - Diagnosis of coil deterioration and its device - Google Patents

Diagnosis of coil deterioration and its device

Info

Publication number
JPS57151850A
JPS57151850A JP56036478A JP3647881A JPS57151850A JP S57151850 A JPS57151850 A JP S57151850A JP 56036478 A JP56036478 A JP 56036478A JP 3647881 A JP3647881 A JP 3647881A JP S57151850 A JPS57151850 A JP S57151850A
Authority
JP
Japan
Prior art keywords
deterioration
vibration
signal
diagnosis
comparator
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
JP56036478A
Other languages
Japanese (ja)
Inventor
Yasuaki Yamazaki
Tadashi Sumimoto
Tsutomu Oshiyama
Kazumasa Mizoguchi
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Manufacturing Co 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 Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Manufacturing Co Ltd
Priority to JP56036478A priority Critical patent/JPS57151850A/en
Publication of JPS57151850A publication Critical patent/JPS57151850A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/025—Change of phase or condition
    • G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2697—Wafer or (micro)electronic parts

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To detect the state of deterioration of insulation clearly and exactly by sensing change in intrinsic vibration frequency and judging drop in compactness in the insulation layer. CONSTITUTION:When a sensor 7 senses vibration, the sensing signal is amplified and filtered at a vibration meter 8, and frequency analysis is carried out in a spectoral analyser 9 to issue signal that is proportional to the intrinsic vibration frequency to a comparator 10. The comparator compares the input signal with the standard value and displays their difference at a display device 12. Accordingly the extent of deterioration can be displayed.
JP56036478A 1981-03-16 1981-03-16 Diagnosis of coil deterioration and its device Pending JPS57151850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036478A JPS57151850A (en) 1981-03-16 1981-03-16 Diagnosis of coil deterioration and its device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036478A JPS57151850A (en) 1981-03-16 1981-03-16 Diagnosis of coil deterioration and its device

Publications (1)

Publication Number Publication Date
JPS57151850A true JPS57151850A (en) 1982-09-20

Family

ID=12470916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036478A Pending JPS57151850A (en) 1981-03-16 1981-03-16 Diagnosis of coil deterioration and its device

Country Status (1)

Country Link
JP (1) JPS57151850A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60174040A (en) * 1984-02-15 1985-09-07 Yaskawa Electric Mfg Co Ltd Method and device for diagnosing deterioration of coil insulation
WO2007058196A1 (en) 2005-11-16 2007-05-24 Kabushiki Kaisha Toshiba Stator core loosening diagnosis device and stator core loosening diagnosis method
JP2012237634A (en) * 2011-05-11 2012-12-06 Hitachi Plant Technologies Ltd Vibration testing system and method for controlling the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163453A (en) * 1979-06-06 1980-12-19 Kobe Steel Ltd Quality discriminating method of cast metal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55163453A (en) * 1979-06-06 1980-12-19 Kobe Steel Ltd Quality discriminating method of cast metal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60174040A (en) * 1984-02-15 1985-09-07 Yaskawa Electric Mfg Co Ltd Method and device for diagnosing deterioration of coil insulation
WO2007058196A1 (en) 2005-11-16 2007-05-24 Kabushiki Kaisha Toshiba Stator core loosening diagnosis device and stator core loosening diagnosis method
EP1950869A1 (en) * 2005-11-16 2008-07-30 Kabushiki Kaisha Toshiba Stator core loosening diagnosis device and stator core loosening diagnosis method
EP1950869A4 (en) * 2005-11-16 2010-09-08 Toshiba Kk STATOR CORE DISSOLVING DIAGNOSTIC DEVICE AND STATOR CORE DISSOLVING DIAGNOSTIC METHOD
JP2012237634A (en) * 2011-05-11 2012-12-06 Hitachi Plant Technologies Ltd Vibration testing system and method for controlling the same

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