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JPS5522144A - Automatic judging device - Google Patents

Automatic judging device

Info

Publication number
JPS5522144A
JPS5522144A JP9506278A JP9506278A JPS5522144A JP S5522144 A JPS5522144 A JP S5522144A JP 9506278 A JP9506278 A JP 9506278A JP 9506278 A JP9506278 A JP 9506278A JP S5522144 A JPS5522144 A JP S5522144A
Authority
JP
Japan
Prior art keywords
noises
motor
outputs
signals
detected
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
JP9506278A
Other languages
Japanese (ja)
Other versions
JPH0127375B2 (en
Inventor
Mataichiro Kiso
Takayuki Koizumi
Teruo Usami
Satoru Inoue
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9506278A priority Critical patent/JPS5522144A/en
Publication of JPS5522144A publication Critical patent/JPS5522144A/en
Publication of JPH0127375B2 publication Critical patent/JPH0127375B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To make it possible to accomplish the accurate judgement without any influence from dark noises by using a plurality of signals including signals caused by the environmental conditions as an object to be judged and by processing the signals and effecting the comparison and inspection with the use of an envelope line detecting circuit and an arithmetic circuit.
CONSTITUTION: When a test motor 1 is stopped, a measuring microphone 2 and a microphone 12 for dark noises detect the dark noises togehter so that the outputs of noise meters 3 and 13 and the outputs of filters 4A and 14A become substantially equal to each other. Both of those output signals are detected by envelope detecting circuits 6A to 6C to 16A to 16C, respectively, so that the outputs of arithmetic circuits 7A and 7C become zero when the motor 1 is stopped. In case the motor 1 is driven to generate motor noises, these noises are detected by the microphone 2. As a result, the amplitude and waveform of each frequency component are compared through the arithmetic circuits 7A to 7C, which are made receptive of the envelope detected outputs of both signals, so that the motor noises are judged.
COPYRIGHT: (C)1980,JPO&Japio
JP9506278A 1978-08-04 1978-08-04 Automatic judging device Granted JPS5522144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9506278A JPS5522144A (en) 1978-08-04 1978-08-04 Automatic judging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9506278A JPS5522144A (en) 1978-08-04 1978-08-04 Automatic judging device

Publications (2)

Publication Number Publication Date
JPS5522144A true JPS5522144A (en) 1980-02-16
JPH0127375B2 JPH0127375B2 (en) 1989-05-29

Family

ID=14127526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9506278A Granted JPS5522144A (en) 1978-08-04 1978-08-04 Automatic judging device

Country Status (1)

Country Link
JP (1) JPS5522144A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131518A (en) * 1982-02-01 1983-08-05 Toyota Motor Corp Analysing method for tracking
JPH03103725A (en) * 1989-05-25 1991-04-30 Hughes Aircraft Co Adaptive analyzer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58131518A (en) * 1982-02-01 1983-08-05 Toyota Motor Corp Analysing method for tracking
JPH03103725A (en) * 1989-05-25 1991-04-30 Hughes Aircraft Co Adaptive analyzer

Also Published As

Publication number Publication date
JPH0127375B2 (en) 1989-05-29

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