JPS5690220A - Abnormal oscillation diagnostic device - Google Patents

Abnormal oscillation diagnostic device

Info

Publication number
JPS5690220A
JPS5690220A JP16686179A JP16686179A JPS5690220A JP S5690220 A JPS5690220 A JP S5690220A JP 16686179 A JP16686179 A JP 16686179A JP 16686179 A JP16686179 A JP 16686179A JP S5690220 A JPS5690220 A JP S5690220A
Authority
JP
Japan
Prior art keywords
analytical
oscillation signal
input
period
fft
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
JP16686179A
Other languages
Japanese (ja)
Inventor
Mitsuyo Nishikawa
Nobuo Kurihara
Yasuo Morooka
Masafumi Takechi
Yoshitoshi Nagahashi
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 JP16686179A priority Critical patent/JPS5690220A/en
Publication of JPS5690220A publication Critical patent/JPS5690220A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To arrange so that an abnormal condition may easily be monitored by making an analytical period when an oscillation signal is input variable in response to the rotary frequency of a rotary machine, fourier-analyzing the analytical period and judging an abnormality through comparison of the analytical results with a preset limited value.
CONSTITUTION: A high-speed input device 4 outputs an input oscillation signal Siv based on an output (analytical period signal) from an analytical period arithmetic device 9 which operates an oscillation signal Sv and a number of rotations NR according to a formula I. FFT analytical device 10 carries out FFT analysis based on an input oscillation signal Siv, outputting an amplitude value a1 to a comparator 11. The comparator 11 compares a limited value memorized beforehand corresponding to the number of rotations NR with an output from FFT analytical device 10 and selects either of "abnormality", "caution" or "normality" depending on the comparison results and displays it on an indicator 12.
COPYRIGHT: (C)1981,JPO&Japio
JP16686179A 1979-12-24 1979-12-24 Abnormal oscillation diagnostic device Pending JPS5690220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16686179A JPS5690220A (en) 1979-12-24 1979-12-24 Abnormal oscillation diagnostic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16686179A JPS5690220A (en) 1979-12-24 1979-12-24 Abnormal oscillation diagnostic device

Publications (1)

Publication Number Publication Date
JPS5690220A true JPS5690220A (en) 1981-07-22

Family

ID=15838995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16686179A Pending JPS5690220A (en) 1979-12-24 1979-12-24 Abnormal oscillation diagnostic device

Country Status (1)

Country Link
JP (1) JPS5690220A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963526A (en) * 1982-10-01 1984-04-11 Ishikawajima Harima Heavy Ind Co Ltd Diagnosing method of rotary machine
JPS5963527A (en) * 1982-10-01 1984-04-11 Ishikawajima Harima Heavy Ind Co Ltd Diagnosing method of rotatry machine
WO1994022025A1 (en) * 1993-03-22 1994-09-29 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
US5420501A (en) * 1993-02-01 1995-05-30 Nsk Ltd. Frequency spectrum analyzer
US5790413A (en) * 1993-03-22 1998-08-04 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
JP2016118419A (en) * 2014-12-19 2016-06-30 公立大学法人県立広島大学 Vibration analysis device and program for rotary machine
US10835356B2 (en) 2016-01-25 2020-11-17 Water Pik, Inc. Swivel assembly for oral irrigator handle
US11213376B2 (en) 2016-01-25 2022-01-04 Water Pik, Inc. Reduced form factor oral irrigator

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963526A (en) * 1982-10-01 1984-04-11 Ishikawajima Harima Heavy Ind Co Ltd Diagnosing method of rotary machine
JPS5963527A (en) * 1982-10-01 1984-04-11 Ishikawajima Harima Heavy Ind Co Ltd Diagnosing method of rotatry machine
JPH0138252B2 (en) * 1982-10-01 1989-08-11 Ishikawajima Harima Heavy Ind
JPH0138251B2 (en) * 1982-10-01 1989-08-11 Ishikawajima Harima Heavy Ind
US5420501A (en) * 1993-02-01 1995-05-30 Nsk Ltd. Frequency spectrum analyzer
WO1994022025A1 (en) * 1993-03-22 1994-09-29 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
US5790413A (en) * 1993-03-22 1998-08-04 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
JP2016118419A (en) * 2014-12-19 2016-06-30 公立大学法人県立広島大学 Vibration analysis device and program for rotary machine
US10835356B2 (en) 2016-01-25 2020-11-17 Water Pik, Inc. Swivel assembly for oral irrigator handle
US11213376B2 (en) 2016-01-25 2022-01-04 Water Pik, Inc. Reduced form factor oral irrigator
US11642203B2 (en) 2016-01-25 2023-05-09 Water Pik, Inc. Oral irrigator handle with hose connector fittings

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