JPS5760230A - Orientating device for position of sound source - Google Patents
Orientating device for position of sound sourceInfo
- Publication number
- JPS5760230A JPS5760230A JP55134356A JP13435680A JPS5760230A JP S5760230 A JPS5760230 A JP S5760230A JP 55134356 A JP55134356 A JP 55134356A JP 13435680 A JP13435680 A JP 13435680A JP S5760230 A JPS5760230 A JP S5760230A
- Authority
- JP
- Japan
- Prior art keywords
- sound source
- vibration wave
- partial power
- pattern
- time delay
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
PURPOSE:To perform orientation of the position of the sound source of a vibration wave propagating on a structure by a method of pattern recognition. CONSTITUTION:A time delay T at a rise point of the vibration wave propagating from the sound source is measured and a square integral value of each signal amplitude is found. A value obtained by dividing each by the maximum P out of a partial power P obtained in this way is determined as a relative partial power RP. When the time delay T and the relative partial power RP thus obtained are plotted on vertical and horizontal axes respectively, a specific pattern is formed in the position of the sound source. On the surface of the pressure vessel 11 of a nuclear reactor an accelerometer 12 is arranged. A strike is applied to the expected position of the sound source of the pressure vessel of the reactor beforehand, the vibration wave is generated thereby, and a reference pattern corresponding to respective positions is obtained from this vibration wave. The orientation of the position of the sound source is conducted by selecting a reference pattern which is most similar to a pattern formed by the vibration wave generated from the sound source to be orientated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55134356A JPS5760230A (en) | 1980-09-29 | 1980-09-29 | Orientating device for position of sound source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55134356A JPS5760230A (en) | 1980-09-29 | 1980-09-29 | Orientating device for position of sound source |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5760230A true JPS5760230A (en) | 1982-04-12 |
Family
ID=15126448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55134356A Pending JPS5760230A (en) | 1980-09-29 | 1980-09-29 | Orientating device for position of sound source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5760230A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60183569A (en) * | 1984-03-02 | 1985-09-19 | Nippon Atom Ind Group Co Ltd | Surveying method of signal generation source |
WO2009057216A1 (en) * | 2007-11-01 | 2009-05-07 | Shikoku Electric Power Company Incorporated | Loose parts monitoring method and device |
-
1980
- 1980-09-29 JP JP55134356A patent/JPS5760230A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60183569A (en) * | 1984-03-02 | 1985-09-19 | Nippon Atom Ind Group Co Ltd | Surveying method of signal generation source |
WO2009057216A1 (en) * | 2007-11-01 | 2009-05-07 | Shikoku Electric Power Company Incorporated | Loose parts monitoring method and device |
JP4703766B2 (en) * | 2007-11-01 | 2011-06-15 | 四国電力株式会社 | Loose parts monitoring method and apparatus |
US8446287B2 (en) | 2007-11-01 | 2013-05-21 | Shikoku Research Institute Incorporated | Loose part monitoring method and system |
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