JPS5764127A - Loose parts monitor - Google Patents

Loose parts monitor

Info

Publication number
JPS5764127A
JPS5764127A JP55139861A JP13986180A JPS5764127A JP S5764127 A JPS5764127 A JP S5764127A JP 55139861 A JP55139861 A JP 55139861A JP 13986180 A JP13986180 A JP 13986180A JP S5764127 A JPS5764127 A JP S5764127A
Authority
JP
Japan
Prior art keywords
pulse
generator
electric noise
rise
fall
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
JP55139861A
Other languages
Japanese (ja)
Inventor
Yuji Hashimoto
Katsumi Kawai
Mitsuo Suzuki
Kimio Yamada
Yoshihiro Michiguchi
Shigeru Ideumi
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.)
Chugoku Electric Power Co Inc
Chubu Electric Power Co Inc
Hitachi Ltd
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Chugoku Electric Power Co Inc
Chubu Electric Power Co Inc
Hitachi 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 Tokyo Electric Power Co Inc, Chugoku Electric Power Co Inc, Chubu Electric Power Co Inc, Hitachi Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP55139861A priority Critical patent/JPS5764127A/en
Publication of JPS5764127A publication Critical patent/JPS5764127A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To make electric noise and impact sound adequately discriminatable by removing electric noise by utilizing the difference in time width between the signals by the electric noise and the impact sound. CONSTITUTION:An input signal 4 is applied via a comparator 6 to a pulse generator 7 after full wave rectification 5. The pulses generated at the rise and fall of input pulses are inputted to a monostable multivibrator (multi) 8, and the output from the multi 8 is applied to generators 9, 10. The pulse at the rise from the generator 9 is delayed 13 by the pulse time width of the multi 8 and is used as a start pulse for a clock device 11. The pulse at the fall from the generator 10 is used as a stop pulse for the device 11. The output of the device 11 is supplied to a decision circuit 12, by which it is compared with a set count value and when it is larger than said value, it is decided as an impact signal.
JP55139861A 1980-10-08 1980-10-08 Loose parts monitor Pending JPS5764127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139861A JPS5764127A (en) 1980-10-08 1980-10-08 Loose parts monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139861A JPS5764127A (en) 1980-10-08 1980-10-08 Loose parts monitor

Publications (1)

Publication Number Publication Date
JPS5764127A true JPS5764127A (en) 1982-04-19

Family

ID=15255241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139861A Pending JPS5764127A (en) 1980-10-08 1980-10-08 Loose parts monitor

Country Status (1)

Country Link
JP (1) JPS5764127A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01214797A (en) * 1988-02-23 1989-08-29 Babcock Hitachi Kk Loose part monitor in fluid channel of nuclear reactor facility
JP2006023222A (en) * 2004-07-09 2006-01-26 Denso Corp Abnormal sound inspection method, abnormal sound inspection apparatus, sound signal inspection method, and sound signal inspection apparatus
JP2011027685A (en) * 2009-07-29 2011-02-10 Shikoku Res Inst Inc Device and method for monitoring of control rod operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01214797A (en) * 1988-02-23 1989-08-29 Babcock Hitachi Kk Loose part monitor in fluid channel of nuclear reactor facility
JP2006023222A (en) * 2004-07-09 2006-01-26 Denso Corp Abnormal sound inspection method, abnormal sound inspection apparatus, sound signal inspection method, and sound signal inspection apparatus
JP2011027685A (en) * 2009-07-29 2011-02-10 Shikoku Res Inst Inc Device and method for monitoring of control rod operation

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