JPS57173353A - Monitoring method and device for axial vibration of rotary electric machine - Google Patents

Monitoring method and device for axial vibration of rotary electric machine

Info

Publication number
JPS57173353A
JPS57173353A JP56057113A JP5711381A JPS57173353A JP S57173353 A JPS57173353 A JP S57173353A JP 56057113 A JP56057113 A JP 56057113A JP 5711381 A JP5711381 A JP 5711381A JP S57173353 A JPS57173353 A JP S57173353A
Authority
JP
Japan
Prior art keywords
period
sampling
axial vibration
electric machine
rotary electric
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
JP56057113A
Other languages
Japanese (ja)
Inventor
Nobuo Kurihara
Yasuo Morooka
Mitsuyo Nishikawa
Kiyoshi Miura
Yoshitoshi Nagahashi
Nobunori Matsudaira
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 JP56057113A priority Critical patent/JPS57173353A/en
Publication of JPS57173353A publication Critical patent/JPS57173353A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation

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 maintain the monitoring accuracy constant even if the rotating speed of a rotary electric machine varies by altering the sampling frequency in response to the rotating speed so that the number of samplings per one period of an axial vibration signal waveform becomes equal and sampling in synchronism with the rotating period. CONSTITUTION:An axial vibration signal waveform vt which is obtained from an axial vibration detector mounted on a rotational shaft is sampled, and the frequency is analyzed by a digital signal processing. In this case, the number of sampling per one period of a vibration signal waveform is predetermined, and the sampling frequency per each waveform is determined by calculating the sampling number and the rotating speed of a rotational shaft. Further, the sampling frequency is synchronized with the rotating period of the rotational shaft so that the phase relationship between the waveform vt and the sampling frequency becomes equal even in any times of the period Ta to be analyzed. The operating state of the rotary electric machine can be monitored in accordance with the analyzed result.
JP56057113A 1981-04-17 1981-04-17 Monitoring method and device for axial vibration of rotary electric machine Pending JPS57173353A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057113A JPS57173353A (en) 1981-04-17 1981-04-17 Monitoring method and device for axial vibration of rotary electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057113A JPS57173353A (en) 1981-04-17 1981-04-17 Monitoring method and device for axial vibration of rotary electric machine

Publications (1)

Publication Number Publication Date
JPS57173353A true JPS57173353A (en) 1982-10-25

Family

ID=13046465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057113A Pending JPS57173353A (en) 1981-04-17 1981-04-17 Monitoring method and device for axial vibration of rotary electric machine

Country Status (1)

Country Link
JP (1) JPS57173353A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6254127A (en) * 1985-09-03 1987-03-09 Toyo Tekunika:Kk Rpm tracking analyzer
CN111030412A (en) * 2019-12-04 2020-04-17 瑞声科技(新加坡)有限公司 Vibration waveform design method and vibration motor
CN113280868A (en) * 2021-07-02 2021-08-20 昆明理工大学 Method and system for synchronously monitoring axial vibration and rotating speed

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610223A (en) * 1979-07-04 1981-02-02 Shimadzu Corp Balance testing method and device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610223A (en) * 1979-07-04 1981-02-02 Shimadzu Corp Balance testing method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6254127A (en) * 1985-09-03 1987-03-09 Toyo Tekunika:Kk Rpm tracking analyzer
CN111030412A (en) * 2019-12-04 2020-04-17 瑞声科技(新加坡)有限公司 Vibration waveform design method and vibration motor
CN113280868A (en) * 2021-07-02 2021-08-20 昆明理工大学 Method and system for synchronously monitoring axial vibration and rotating speed
CN113280868B (en) * 2021-07-02 2022-02-15 昆明理工大学 Method and system for synchronously monitoring axial vibration and rotating speed

Similar Documents

Publication Publication Date Title
CN105634718B (en) Apparatus and method for signal synchronization
US3731526A (en) Variable center frequency filter
JPS57169611A (en) Measuring device for angular displacement
JPS54111871A (en) Frequency detecting method
JPS57144465A (en) Speed detecting method
JPH04270935A (en) Method and apparatus for monitoring operating state of rotating part of machine
JPS57173353A (en) Monitoring method and device for axial vibration of rotary electric machine
Christiansen et al. Digital measurement of angular velocity for speed control
GB2344177A (en) Detecting vibration of turbine blades
GB2312958A (en) Method and apparatus for analysing variations in rotary motion
JPS54160287A (en) Torsional vibration monitoring apparatus of revolving shaft systems
JPS5554429A (en) Bearing supervisory unit
GB2075196A (en) Machine shaft torque measurement
JPS54154059A (en) Method of and device for identifying malfunction of rotary machine
JPS57203962A (en) Detecting circuit for speed
Kaye et al. High resolution adaptive tachometer for spindle motor drives
EP0088626A3 (en) Apparatus for controlling the speed of a rotating body
JPS5517270A (en) Starting system for ac motor
JPS5325477A (en) Rotation signal detector
US3893030A (en) Coincidence measuring circuit for indicating time intervals
JPS5719671A (en) Revolution speed detector
JPS57203924A (en) Vibration analysis device
Schreiber Improved method for precise shaft angle oscillation and angular velocity measurement:(With simultaneous sampling of other analog signals using NI DAQ Cards)
JPS55104781A (en) Apparatus for measuring operating time
JPS57147150A (en) Tape end detecting system