JPS57114846A - Detecting apparatus for abnormal sound - Google Patents

Detecting apparatus for abnormal sound

Info

Publication number
JPS57114846A
JPS57114846A JP56000422A JP42281A JPS57114846A JP S57114846 A JPS57114846 A JP S57114846A JP 56000422 A JP56000422 A JP 56000422A JP 42281 A JP42281 A JP 42281A JP S57114846 A JPS57114846 A JP S57114846A
Authority
JP
Japan
Prior art keywords
signal
time
outputted
sound
abnormal sound
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
JP56000422A
Other languages
English (en)
Japanese (ja)
Other versions
JPS649584B2 (enrdf_load_stackoverflow
Inventor
Yuji Hashimoto
Katsumi Kawai
Takahiko Ito
Shigeru Ideumi
Yoshihiro Michiguchi
Kimio Yamada
Satoshi Tanisaka
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.)
Chugoku Electric Power Co Inc
Chubu Electric Power Co Inc
Hitachi Ltd
Tokyo Electric Power Co Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Chugoku Electric Power Co Inc
Chubu Electric Power Co Inc
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 Tokyo Electric Power Co Inc, Chugoku Electric Power Co Inc, Chubu Electric Power Co Inc, Hitachi Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP56000422A priority Critical patent/JPS57114846A/ja
Publication of JPS57114846A publication Critical patent/JPS57114846A/ja
Publication of JPS649584B2 publication Critical patent/JPS649584B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4463—Signal correction, e.g. distance amplitude correction [DAC], distance gain size [DGS], noise filtering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/32—Arrangements for suppressing undesired influences, e.g. temperature or pressure variations, compensating for signal noise
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
    • G01N29/4427—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison with stored values, e.g. threshold values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects

Landscapes

  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
JP56000422A 1981-01-07 1981-01-07 Detecting apparatus for abnormal sound Granted JPS57114846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56000422A JPS57114846A (en) 1981-01-07 1981-01-07 Detecting apparatus for abnormal sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56000422A JPS57114846A (en) 1981-01-07 1981-01-07 Detecting apparatus for abnormal sound

Publications (2)

Publication Number Publication Date
JPS57114846A true JPS57114846A (en) 1982-07-16
JPS649584B2 JPS649584B2 (enrdf_load_stackoverflow) 1989-02-17

Family

ID=11473359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56000422A Granted JPS57114846A (en) 1981-01-07 1981-01-07 Detecting apparatus for abnormal sound

Country Status (1)

Country Link
JP (1) JPS57114846A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6171948A (ja) * 1985-08-09 1986-04-12 Nippon Sheet Glass Co Ltd 製造工程での板材の位置決め装置
CN102389912A (zh) * 2011-08-04 2012-03-28 大连理工大学 一种温热成形在线检测方法及装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159384A (enrdf_load_stackoverflow) * 1974-06-12 1975-12-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159384A (enrdf_load_stackoverflow) * 1974-06-12 1975-12-23

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6171948A (ja) * 1985-08-09 1986-04-12 Nippon Sheet Glass Co Ltd 製造工程での板材の位置決め装置
CN102389912A (zh) * 2011-08-04 2012-03-28 大连理工大学 一种温热成形在线检测方法及装置

Also Published As

Publication number Publication date
JPS649584B2 (enrdf_load_stackoverflow) 1989-02-17

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