JPS6410166A - Detecting method for defective insulator - Google Patents

Detecting method for defective insulator

Info

Publication number
JPS6410166A
JPS6410166A JP62166471A JP16647187A JPS6410166A JP S6410166 A JPS6410166 A JP S6410166A JP 62166471 A JP62166471 A JP 62166471A JP 16647187 A JP16647187 A JP 16647187A JP S6410166 A JPS6410166 A JP S6410166A
Authority
JP
Japan
Prior art keywords
laser light
insulator
vibration mode
normal
vibrating
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
JP62166471A
Other languages
Japanese (ja)
Inventor
Kenji Horii
Chobe Yamabe
Katsuhiko Naito
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.)
NGK Insulators Ltd
Original Assignee
NGK Insulators 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 NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP62166471A priority Critical patent/JPS6410166A/en
Publication of JPS6410166A publication Critical patent/JPS6410166A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To accurately detect defective insulator on the ground in sefety by projecting laser light on the glass and vibrating it, detecting its vibrations from the reflected laser light of a laser for measurement, and comparing the detection result with the vibration mode of normal insulator. CONSTITUTION:A pulse laser generator 9 projects the pulse laser light on the ceramic surface of suspended glass 5 first to give a mechanical shock, thereby vibrating the insulator 5. Then a laser Doppler device 10 projects laser light for measurement on the ceramic surface 6a and receives its reflected laser light, and a frequency analyzer 11 analyzes the frequency of the received laser light. Then a comparing decision device 12 compares the measured vibration mode with the vibration mode of normal insulator 5. Then a normal state pilot lamp illuminates when there is no difference between both modes, but an abnormal state pilot lamp illuminate when there is difference between both modes.
JP62166471A 1987-07-02 1987-07-02 Detecting method for defective insulator Pending JPS6410166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62166471A JPS6410166A (en) 1987-07-02 1987-07-02 Detecting method for defective insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62166471A JPS6410166A (en) 1987-07-02 1987-07-02 Detecting method for defective insulator

Publications (1)

Publication Number Publication Date
JPS6410166A true JPS6410166A (en) 1989-01-13

Family

ID=15832011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62166471A Pending JPS6410166A (en) 1987-07-02 1987-07-02 Detecting method for defective insulator

Country Status (1)

Country Link
JP (1) JPS6410166A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0372258A (en) * 1989-08-11 1991-03-27 Ngk Insulators Ltd Method for detecting inferior insulator
JP2002040001A (en) * 2000-07-25 2002-02-06 Mitsui Eng & Shipbuild Co Ltd Flaw detection method and device

Citations (3)

* 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
JPS5890164A (en) * 1981-11-25 1983-05-28 Nippon Steel Corp Method and device for transmission and reception of ultrasonic wave by laser light
JPS606860A (en) * 1983-06-15 1985-01-14 Hitachi Ltd Ultrasonic flaw detecting method

Patent Citations (3)

* 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
JPS5890164A (en) * 1981-11-25 1983-05-28 Nippon Steel Corp Method and device for transmission and reception of ultrasonic wave by laser light
JPS606860A (en) * 1983-06-15 1985-01-14 Hitachi Ltd Ultrasonic flaw detecting method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0372258A (en) * 1989-08-11 1991-03-27 Ngk Insulators Ltd Method for detecting inferior insulator
JP2002040001A (en) * 2000-07-25 2002-02-06 Mitsui Eng & Shipbuild Co Ltd Flaw detection method and device

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