JPS56158921A - Method for generating revolution synchronizing pulse - Google Patents

Method for generating revolution synchronizing pulse

Info

Publication number
JPS56158921A
JPS56158921A JP6285580A JP6285580A JPS56158921A JP S56158921 A JPS56158921 A JP S56158921A JP 6285580 A JP6285580 A JP 6285580A JP 6285580 A JP6285580 A JP 6285580A JP S56158921 A JPS56158921 A JP S56158921A
Authority
JP
Japan
Prior art keywords
voltage
power source
circuit
revolutions
inputted
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
JP6285580A
Other languages
Japanese (ja)
Inventor
Makoto Senoo
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 JP6285580A priority Critical patent/JPS56158921A/en
Publication of JPS56158921A publication Critical patent/JPS56158921A/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
    • G01H1/003—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To obtain the pulses synchronized to the revolutions of an AC generator for diagnosis without stopping of the rotary machine by a means of generating pulses at the same phase point of source voltage from a commerical power source. CONSTITUTION:The AC voltage 4 obtained from a commercial power source in a power station is inputted to a halfwave rectifier circuit 1 in order to obtain one pulse per cycle. Next, the voltage 5 obtained in the circuit 1 is inputted to a comparator circuit. This yields such the voltage signal in which about half period out of one cycle wherein it is the voltage determined by a circuit constant below certain threshold value voltage Vs and is zero output voltage above the threshold value voltage Vs is of a high level and the other half period is of a low level. In this way, the pulses synchronized with the revolutions are obtained easily from the AC generator in a state of parallel operation with the commerical power source.
JP6285580A 1980-05-14 1980-05-14 Method for generating revolution synchronizing pulse Pending JPS56158921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6285580A JPS56158921A (en) 1980-05-14 1980-05-14 Method for generating revolution synchronizing pulse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6285580A JPS56158921A (en) 1980-05-14 1980-05-14 Method for generating revolution synchronizing pulse

Publications (1)

Publication Number Publication Date
JPS56158921A true JPS56158921A (en) 1981-12-08

Family

ID=13212326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6285580A Pending JPS56158921A (en) 1980-05-14 1980-05-14 Method for generating revolution synchronizing pulse

Country Status (1)

Country Link
JP (1) JPS56158921A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008082967A (en) * 2006-09-28 2008-04-10 Toshiba Corp Vibration diagnostic system for rotary machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008082967A (en) * 2006-09-28 2008-04-10 Toshiba Corp Vibration diagnostic system for rotary machine

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