JPS54147883A - Abnormality detector of mechanical structures - Google Patents
Abnormality detector of mechanical structuresInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6335926U (en) * | 1986-08-26 | 1988-03-08 | ||
JPS6393526U (en) * | 1986-12-09 | 1988-06-16 |
-
1978
- 1978-05-12 JP JP5693678A patent/JPS54147883A/en active Pending
Cited By (2)
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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