JPS57191520A - Oscillation monitor for rotary machine - Google Patents

Oscillation monitor for rotary machine

Info

Publication number
JPS57191520A
JPS57191520A JP7660881A JP7660881A JPS57191520A JP S57191520 A JPS57191520 A JP S57191520A JP 7660881 A JP7660881 A JP 7660881A JP 7660881 A JP7660881 A JP 7660881A JP S57191520 A JPS57191520 A JP S57191520A
Authority
JP
Japan
Prior art keywords
signal
sine
oscillation
rotational frequency
wave
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
JP7660881A
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 JP7660881A priority Critical patent/JPS57191520A/en
Publication of JPS57191520A publication Critical patent/JPS57191520A/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)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

PURPOSE:To detect the occurrence of abnormal oscillation and its factor by finding the extent of the shift of an oscillation waveform, detected from a rotary machine, from that of a sine wave. CONSTITUTION:An operating device 1 finds a rotational frequency signal 101 from a rotation detection signal 100. A filter 2 extracts a rotational frequency component from an oscillation signal 102 to obtain a filtered signal close to a sine wave. A synchronizing pulse generator 3 generates a pulse every time when the signal 103 changes in polarity, and a sine-wave generating circuit 4 outputs a sine-wave signal 105 with a rotational frequency synchronously with the signal 104 of said generated pulse. After a standardized signal 106 generated by a standardizing circuit 5 inputting the signal 102 is supplied to an operating device 6 to find its difference from the inphase signal 105, the integration is started synchronously with the signal 104 and stopped one period later. An abnormal factor deciding device 7 decides the magnitude of the integral value signal 107 and outputs an abnormal factor signal 108.
JP7660881A 1981-05-22 1981-05-22 Oscillation monitor for rotary machine Pending JPS57191520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7660881A JPS57191520A (en) 1981-05-22 1981-05-22 Oscillation monitor for rotary machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7660881A JPS57191520A (en) 1981-05-22 1981-05-22 Oscillation monitor for rotary machine

Publications (1)

Publication Number Publication Date
JPS57191520A true JPS57191520A (en) 1982-11-25

Family

ID=13610043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7660881A Pending JPS57191520A (en) 1981-05-22 1981-05-22 Oscillation monitor for rotary machine

Country Status (1)

Country Link
JP (1) JPS57191520A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007118931A2 (en) * 2006-04-03 2007-10-25 Metso Automation Oy A method and a system for monitoring the condition and operation of periodically moving objects
JP2008170400A (en) * 2007-01-15 2008-07-24 Omron Corp Inspection device, control method therefor, and inspection device control program

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007118931A2 (en) * 2006-04-03 2007-10-25 Metso Automation Oy A method and a system for monitoring the condition and operation of periodically moving objects
WO2007118931A3 (en) * 2006-04-03 2008-05-02 Metso Automation Oy A method and a system for monitoring the condition and operation of periodically moving objects
US7822580B2 (en) 2006-04-03 2010-10-26 Metso Automation Oy Method and a system for monitoring the condition and operation of periodically moving objects
JP2008170400A (en) * 2007-01-15 2008-07-24 Omron Corp Inspection device, control method therefor, and inspection device control program

Similar Documents

Publication Publication Date Title
US3654479A (en) Monitoring apparatus
NO824144L (en) PROCEDURE AND APPARATUS FOR AA MAAL TOOL CONDITIONS IN A CYCLIC MACHINE TOOL MACHINE
JPS57169611A (en) Measuring device for angular displacement
EP1327980A3 (en) Rotation control apparatus operating with a sync signal having variable intervals
US4135244A (en) Method and apparatus for programming and reducing runout in rotating shaft vibration signal detection
JPS5676637A (en) Phase synchronizing circuit
KR910700568A (en) Digital automatic frequency control on pure sine wave
JPS57191520A (en) Oscillation monitor for rotary machine
US4433332A (en) Apparatus for remotely determining the position of rotating objects
US3349257A (en) Sine wave synthesis circuit
US4692692A (en) Electronic apparatus for detecting stray variations in an electrical voltage as a function of time
US3760189A (en) Motion detecting apparatus
JPS54147882A (en) Abnormality occurrence detecting method of rotating machine using acoustic signals
ATE202253T1 (en) DEVICE FOR DERIVING A CLOCK SIGNAL FROM A SYNCHRONOUS SIGNAL AND VIDEO RECORDING DEVICE EQUIPPED WITH THE DEVICE
JPS5677759A (en) Detecting device of rotational frequency
US4015210A (en) Circuit for detecting predetermined voltage level crossings of the modulating component of a frequency modulated signal
KR900005776A (en) Circuit device for TV signal processing
JPH07131312A (en) Pulse omission detector for pulse transmitter
JPS56117128A (en) Diagnostic device for oscillation of rotary apparatus
SU637654A1 (en) Electromagnetic flat detector
IT1163474B (en) PROCEDURE FOR SPEEDOMETER SIMULATION WITH PROCESSING OF SIGNALS COMING FROM A POSITION DETECTOR OF AN INDUCTIVE OR CAPACITIVE TYPE AND CIRCUIT FOR THE IMPLEMENTATION OF THAT PROCEDURE
SU1420511A1 (en) Method and apparatus for eddy-current inspection
SU1504784A1 (en) Detector of am signals
JPS5897619A (en) Rotation pulse detector
FI97751B (en) Process and device for monitoring the working of rotary machine parts