JPS5572856A - Defect evaluating method by ultrasonic wave - Google Patents
Defect evaluating method by ultrasonic waveInfo
- Publication number
- JPS5572856A JPS5572856A JP14656478A JP14656478A JPS5572856A JP S5572856 A JPS5572856 A JP S5572856A JP 14656478 A JP14656478 A JP 14656478A JP 14656478 A JP14656478 A JP 14656478A JP S5572856 A JPS5572856 A JP S5572856A
- Authority
- JP
- Japan
- Prior art keywords
- angle
- ultrasonic wave
- wave beam
- scan
- defect
- 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
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE: To make it possible to evaluate defective depth by using an ultrasonic wave beam such as a focusing beam, by determining a defective size on the basis of the angle, etc., of a fan-shaped scan of the ultrasonic wave beam.
CONSTITUTION: Variable-angle ultrasonic probe 1 is formed of concave-surface vibrator 4 incorporated with circumferential element 3 reciprocating in contact with fixed shoe 2 and probe 1 takes a fan-shaped scan of an ultrasonic wave beam to inspect the defect of tested body 6. According to refraction angle (θr1) corresponding to the scan angle of probe 1 at the point in time when a vertical cracking defect of tested body 6 is detected and refraction-angle variation (Δθ) corresponding the increment of the scan angle until the defect disappears, arithmetic based upon formula I is carried out to determine cracking depth (d). Here, T is the thickness of the tested body and W is the width of the ultrasonic wave beam. Consequently, the cracking depth can easily be measured by using a fine ultrasonic wave beam through the measurement of angle of a fun-shaped scan beam corresponding to variation in refraction angle without movement-distance measurement.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14656478A JPS5572856A (en) | 1978-11-29 | 1978-11-29 | Defect evaluating method by ultrasonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14656478A JPS5572856A (en) | 1978-11-29 | 1978-11-29 | Defect evaluating method by ultrasonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5572856A true JPS5572856A (en) | 1980-06-02 |
Family
ID=15410520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14656478A Pending JPS5572856A (en) | 1978-11-29 | 1978-11-29 | Defect evaluating method by ultrasonic wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5572856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61251768A (en) * | 1985-05-01 | 1986-11-08 | Hitachi Constr Mach Co Ltd | Measuring method for size of defect in surface layer of solid body by ultrasonic wave |
-
1978
- 1978-11-29 JP JP14656478A patent/JPS5572856A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61251768A (en) * | 1985-05-01 | 1986-11-08 | Hitachi Constr Mach Co Ltd | Measuring method for size of defect in surface layer of solid body by ultrasonic wave |
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