JPS54147883A - Abnormality detector of mechanical structures - Google Patents

Abnormality detector of mechanical structures

Info

Publication number
JPS54147883A
JPS54147883A JP5693678A JP5693678A JPS54147883A JP S54147883 A JPS54147883 A JP S54147883A JP 5693678 A JP5693678 A JP 5693678A JP 5693678 A JP5693678 A JP 5693678A JP S54147883 A JPS54147883 A JP S54147883A
Authority
JP
Japan
Prior art keywords
level
sound
specified
signal
reliability
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
JP5693678A
Other languages
Japanese (ja)
Inventor
Hiroto Shiromizu
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 JP5693678A priority Critical patent/JPS54147883A/en
Publication of JPS54147883A publication Critical patent/JPS54147883A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To achieve the improvement in the reliability in abnormality detection by judging that when the sound pressure of the sound which a mechanical structure produces continues for more than the specified set time at above the set value is defective.
CONSTITUTION: The sound which a mechanical structure produces is detected with a microphone 1 and is applied to a level set value 6 through a level detector 4 and the detection voltage corresponding to the specified sound pressure or higher is applied to a level comparator 7. Then, the comparator 7 generates the abnormality signal only when the voltage above the set level having been applied continues for more than the specified time, whereby the wrong recognition by the signal shot type signal is prevented and the reliability of abnormality detection is improved.
COPYRIGHT: (C)1979,JPO&Japio
JP5693678A 1978-05-12 1978-05-12 Abnormality detector of mechanical structures Pending JPS54147883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5693678A JPS54147883A (en) 1978-05-12 1978-05-12 Abnormality detector of mechanical structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5693678A JPS54147883A (en) 1978-05-12 1978-05-12 Abnormality detector of mechanical structures

Publications (1)

Publication Number Publication Date
JPS54147883A true JPS54147883A (en) 1979-11-19

Family

ID=13041399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5693678A Pending JPS54147883A (en) 1978-05-12 1978-05-12 Abnormality detector of mechanical structures

Country Status (1)

Country Link
JP (1) JPS54147883A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6335926U (en) * 1986-08-26 1988-03-08
JPS6393526U (en) * 1986-12-09 1988-06-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6335926U (en) * 1986-08-26 1988-03-08
JPS6393526U (en) * 1986-12-09 1988-06-16

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