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JPS57194320A - Method and device for detecting fault of oscillation measurement system - Google Patents

Method and device for detecting fault of oscillation measurement system

Info

Publication number
JPS57194320A
JPS57194320A JP7930281A JP7930281A JPS57194320A JP S57194320 A JPS57194320 A JP S57194320A JP 7930281 A JP7930281 A JP 7930281A JP 7930281 A JP7930281 A JP 7930281A JP S57194320 A JPS57194320 A JP S57194320A
Authority
JP
Japan
Prior art keywords
oscillation
measurement system
reference signal
relays
meters
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
JP7930281A
Other languages
Japanese (ja)
Inventor
Fumio Fujisawa
Masakazu Takazumi
Kazuo Sato
Hironori Shiohata
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.)
Hitachi Ltd
Original Assignee
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7930281A priority Critical patent/JPS57194320A/en
Publication of JPS57194320A publication Critical patent/JPS57194320A/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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

PURPOSE:To detect a fault of an oscillation measurement system in its early stage by judging that the measurement system becomes abnormal when a measured oscillation value is less than a prescribed value. CONSTITUTION:Signals detected by oscillation pickups 8-11 arranged opposite to the journal bearing part of rotors 1 and 2 are amplified. Outputs from oscillation meters 12-15 are compared with reference signal voltages from reference signal voltage generators 29-32 by comparators 18-21 in a measurement monitoring device 17. When the output signals of the oscillation meters are less than the reference signal voltages from the generators 29-32, relays 22-25 operate to constitute parallel circuits mutually, and pilot lamps 33 and 36 are installed in the respective circuits. If one of the four relays 22-25 is closed, the corresponding pilot lamp turns on and a main switch 27 and a power source 26 operate to put an alarm 28 in operation.
JP7930281A 1981-05-27 1981-05-27 Method and device for detecting fault of oscillation measurement system Pending JPS57194320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7930281A JPS57194320A (en) 1981-05-27 1981-05-27 Method and device for detecting fault of oscillation measurement system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7930281A JPS57194320A (en) 1981-05-27 1981-05-27 Method and device for detecting fault of oscillation measurement system

Publications (1)

Publication Number Publication Date
JPS57194320A true JPS57194320A (en) 1982-11-29

Family

ID=13686041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7930281A Pending JPS57194320A (en) 1981-05-27 1981-05-27 Method and device for detecting fault of oscillation measurement system

Country Status (1)

Country Link
JP (1) JPS57194320A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008134115A (en) * 2006-11-28 2008-06-12 Nsk Ltd Abnormality diagnosis device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008134115A (en) * 2006-11-28 2008-06-12 Nsk Ltd Abnormality diagnosis device

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