JPS5777957A - Acoustic flaw detector - Google Patents
Acoustic flaw detectorInfo
- Publication number
- JPS5777957A JPS5777957A JP55153892A JP15389280A JPS5777957A JP S5777957 A JPS5777957 A JP S5777957A JP 55153892 A JP55153892 A JP 55153892A JP 15389280 A JP15389280 A JP 15389280A JP S5777957 A JPS5777957 A JP S5777957A
- Authority
- JP
- Japan
- Prior art keywords
- crack
- sensor
- point
- sensors
- propagation
- 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
- 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
- G01N29/14—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 using acoustic emission techniques
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE:To enable detection of the shape of a crack as well as the presence thereof by moving along the crack two AE signal sensors detecting an AE signal generated from the crack of a body being measured. CONSTITUTION:AE detection sensors S1 and S2 are positioned on the surface of the part of a board 10 in which no cracks are detected, the load is applied in the direction shown by arrows P and Q, and the velocity of propagation V0 is found from the difference in the time required for two sensors S1 and S2 to detect the AE signal generated by the application of the load. Next, the sensor S1 is fixed at the aforesaid position, while the sensor S2 is moved on the surface of the board 10 in the direction shown by the arrows. Since a point where a peak value is found in the result of the measurement by a time difference measuring device 5 during the movement is the position where a crack 9 is present, the depth A1 of the crack 9 is determined from the ratio of the velocity of propagation V1 at this point to the aforesaid V0. Then, the sensor S1 is moved in the direction of an arrow X to points located at prescribed intervals and the respective depth of the crack 9 at these points is determined to be A1...AN from the ratio of VN/V0 at each point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55153892A JPS5777957A (en) | 1980-11-04 | 1980-11-04 | Acoustic flaw detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55153892A JPS5777957A (en) | 1980-11-04 | 1980-11-04 | Acoustic flaw detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5777957A true JPS5777957A (en) | 1982-05-15 |
Family
ID=15572387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55153892A Pending JPS5777957A (en) | 1980-11-04 | 1980-11-04 | Acoustic flaw detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5777957A (en) |
-
1980
- 1980-11-04 JP JP55153892A patent/JPS5777957A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5733301A (en) | Copying probe for coordinate measuring machine | |
| JPS5777957A (en) | Acoustic flaw detector | |
| JPS5548602A (en) | Steel rope surface unevenness detection measuring method via magnetism-sensitive element | |
| JPS57147007A (en) | Method for measurement of length of continuously running material | |
| JPS5728206A (en) | Shape measuring device | |
| JPS55113949A (en) | Flaw detector for cast iron pipe | |
| JPS57110911A (en) | Measurement of length of object by supersonic wave | |
| JPS646710A (en) | Measuring apparatus for sheet thickness | |
| SU976370A1 (en) | Method of locating position of acoustic emission source in articles | |
| JPS5779404A (en) | Detecting method for local faulty thickness of plate of metallic belt type material | |
| JPS55147377A (en) | Road surface state detector | |
| JPS5583803A (en) | Dimension measuring unit | |
| JPS5499665A (en) | Measuring method of peripheral lengths of pipe before welding | |
| JPS56128455A (en) | Ultrasonic flaw detecting method | |
| JPS5233788A (en) | Signal identification apparatus in ae signal position detection appara tus | |
| JPS55140146A (en) | Surface flaw detection for continuous casting slab | |
| JPS5560850A (en) | Sound wave monitor | |
| GB1484954A (en) | Device for detecting elongation of a conveyor belt joint | |
| JPS56129806A (en) | Detection of shape of rectangular material in ultrasonic inspection | |
| RU2112223C1 (en) | Method of determination of briquetted production and device intended for its realization | |
| JPS5222946A (en) | Device for measuring an object in the water | |
| SU637654A1 (en) | Electromagnetic flat detector | |
| JPS57184958A (en) | Roll mark detecting device | |
| JPS57135354A (en) | Defect detecting method of substance | |
| JPS5676075A (en) | Detecting method of material buried underground and device thereof |