JPS568505A - Thickness measuring method of organic coated layer by ultrasonic wave - Google Patents
Thickness measuring method of organic coated layer by ultrasonic waveInfo
- Publication number
- JPS568505A JPS568505A JP8423279A JP8423279A JPS568505A JP S568505 A JPS568505 A JP S568505A JP 8423279 A JP8423279 A JP 8423279A JP 8423279 A JP8423279 A JP 8423279A JP S568505 A JPS568505 A JP S568505A
- Authority
- JP
- Japan
- Prior art keywords
- coated layer
- measurement system
- output
- same
- steel pipe
- 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
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
PURPOSE: To realize the measurement for the thickness of the inner surface coated layer from outside the steel pipe, by carrying out the addition and subtraction between the ultrasonic flaw inspecting output sent from outside the steel pipe having the organic coated layer on the inner surface and the same output of the test piece having the same quality and same thickness as the steel pipe.
CONSTITUTION: The ultrasonic flaw inspecting output is extracted out of the outside of metal 2 having organic coated layer 3 through the 1st measurement system and by applying probe 1. Then the same output is extracted through the 2nd measurement system from test piece 2' having the same quality and same thickness as metal 2. The output signal of the 2nd measurement system is added to the output signal of the 1st measurement system with the phase inverted via phase inverting part 6 and addition part 7 each. Thus the multiple reflected echo group at the junction part between the coated layer and the metal in the signal of the 1st measurement system is offset by the echo group of the 2nd measurement system to eliminate completely the fault caused by the echo. As a result, the minute reflected echo 5' from the back of the coated layer can be detected assuredly and effectively.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8423279A JPS568505A (en) | 1979-07-03 | 1979-07-03 | Thickness measuring method of organic coated layer by ultrasonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8423279A JPS568505A (en) | 1979-07-03 | 1979-07-03 | Thickness measuring method of organic coated layer by ultrasonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS568505A true JPS568505A (en) | 1981-01-28 |
Family
ID=13824722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8423279A Pending JPS568505A (en) | 1979-07-03 | 1979-07-03 | Thickness measuring method of organic coated layer by ultrasonic wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS568505A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5851456U (en) * | 1981-10-02 | 1983-04-07 | キヤノン株式会社 | 3 color light emitting diode element |
| JP2014016187A (en) * | 2012-07-06 | 2014-01-30 | Ihi Aerospace Co Ltd | Method of measuring reduction rate of burning material |
-
1979
- 1979-07-03 JP JP8423279A patent/JPS568505A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5851456U (en) * | 1981-10-02 | 1983-04-07 | キヤノン株式会社 | 3 color light emitting diode element |
| JP2014016187A (en) * | 2012-07-06 | 2014-01-30 | Ihi Aerospace Co Ltd | Method of measuring reduction rate of burning material |
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