JPS57196118A - Abnormality detector for rotary mechanism - Google Patents

Abnormality detector for rotary mechanism

Info

Publication number
JPS57196118A
JPS57196118A JP56080392A JP8039281A JPS57196118A JP S57196118 A JPS57196118 A JP S57196118A JP 56080392 A JP56080392 A JP 56080392A JP 8039281 A JP8039281 A JP 8039281A JP S57196118 A JPS57196118 A JP S57196118A
Authority
JP
Japan
Prior art keywords
substracting
circuits
signal
pulse
sensor
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.)
Granted
Application number
JP56080392A
Other languages
Japanese (ja)
Other versions
JPS622243B2 (en
Inventor
Takashi Serizawa
Makoto Suzuki
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP56080392A priority Critical patent/JPS57196118A/en
Publication of JPS57196118A publication Critical patent/JPS57196118A/en
Publication of JPS622243B2 publication Critical patent/JPS622243B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid

Abstract

PURPOSE:To prevent the influence from being exercised by a burst sound, by a method wherein a count value of a noise sensor is substracted from a count value of a spin sound sensor with a determined detecting time. CONSTITUTION:A sound, detected by a sensor 1, is separated as a spin signal by band-pass filters 31-35 via an amplifying circuit 2 to input it to detecting counting circuits 41-45. It is then inputted to a comparator via a rectifying circuit and a wave-form shaping circuit to compare it with a reference signal, and if it exceeds the reference signal, a pulse is outputted. A counter counts a pulse and outputs it to adding terminals of adding and substracting circuits 51-55. Meanwhile, a noise signal, generated by a noise sensor 21, is separated by band- pass filters 36-39 via an amplifying circuit 22, it is compared with a reference signal by detecting counting circuits 46-49, and a counting value of a pulse to be outputted is inputted to the substracting terminals of the adding and substracting circuits 51-55. If the count value of the adding and substracting 51-55 are other than a value having a predetermined width, a deciding means 9 outputs a signal, and said operation is performed at each frequency band.
JP56080392A 1981-05-27 1981-05-27 Abnormality detector for rotary mechanism Granted JPS57196118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56080392A JPS57196118A (en) 1981-05-27 1981-05-27 Abnormality detector for rotary mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56080392A JPS57196118A (en) 1981-05-27 1981-05-27 Abnormality detector for rotary mechanism

Publications (2)

Publication Number Publication Date
JPS57196118A true JPS57196118A (en) 1982-12-02
JPS622243B2 JPS622243B2 (en) 1987-01-19

Family

ID=13717009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56080392A Granted JPS57196118A (en) 1981-05-27 1981-05-27 Abnormality detector for rotary mechanism

Country Status (1)

Country Link
JP (1) JPS57196118A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195218A (en) * 1984-10-17 1986-05-14 Nissan Motor Co Ltd Apparatus for discriminating abnormally of machine operation sound
JPH02227617A (en) * 1989-02-28 1990-09-10 Ishikawajima Harima Heavy Ind Co Ltd Abnormal sound detector
JPH10290810A (en) * 1997-04-21 1998-11-04 Osada Res Inst Ltd Hand piece for odontotherapy
JP2014092504A (en) * 2012-11-06 2014-05-19 Jatco Ltd Abnormality determination device and abnormality determination method of automatic transmission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6195218A (en) * 1984-10-17 1986-05-14 Nissan Motor Co Ltd Apparatus for discriminating abnormally of machine operation sound
JPH0367581B2 (en) * 1984-10-17 1991-10-23 Nissan Motor
JPH02227617A (en) * 1989-02-28 1990-09-10 Ishikawajima Harima Heavy Ind Co Ltd Abnormal sound detector
JPH10290810A (en) * 1997-04-21 1998-11-04 Osada Res Inst Ltd Hand piece for odontotherapy
JP2014092504A (en) * 2012-11-06 2014-05-19 Jatco Ltd Abnormality determination device and abnormality determination method of automatic transmission

Also Published As

Publication number Publication date
JPS622243B2 (en) 1987-01-19

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