JPS641957A - Measurement of thickness of scale in pipe - Google Patents
Measurement of thickness of scale in pipeInfo
- Publication number
- JPS641957A JPS641957A JP62158019A JP15801987A JPS641957A JP S641957 A JPS641957 A JP S641957A JP 62158019 A JP62158019 A JP 62158019A JP 15801987 A JP15801987 A JP 15801987A JP S641957 A JPS641957 A JP S641957A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- signal
- scale
- thickness
- echo signal
- 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)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE: To achieve a higher measuring accuracy of the thickness of scale with easier discrimination of reflected ultrasonic waves generated on an interface, by transmitting a pulse-like ultrasonic wave several times at a specified time interval to the inside of a fluid pipe to check a correlationship between a delay signal and a direct signal.
CONSTITUTION: Pulse-like ultrasonic waves 5 are transmitted to the inside of a pipe 2 with a fluid 1 flowing therethrough from outside the pipe 2 at specified time intervals and the reflected wave hereof is received to output an echo signal 16a according to an elapsed pattern of the reflected wave. The echo signal 16a is delayed by a time equal to a time interval to be outputted as delay signal 17a. A difference signal 18a is displayed with time according to a difference between the delay signal 17a and the echo signal 16a. A non- waveform time is detected in the results on display to measure the thickness of scale 6 from an interface 9 to 10 from the results of measurement and sound velocity through the scale and pipe material and the thickness of the pipe wall obtained by a separate means.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-158019A JPH011957A (en) | 1987-06-25 | Method for measuring pipe scale thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-158019A JPH011957A (en) | 1987-06-25 | Method for measuring pipe scale thickness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS641957A true JPS641957A (en) | 1989-01-06 |
| JPH011957A JPH011957A (en) | 1989-01-06 |
Family
ID=
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03188390A (en) * | 1989-12-19 | 1991-08-16 | Touden Kogyo Kk | Measuring method of sticking state of marine life inside piping |
| KR100883512B1 (en) * | 2002-10-02 | 2009-02-17 | 주식회사 포스코 | Sensing and eliminating apparatus of scale sticked on the dust pipe |
| JP2012154744A (en) * | 2011-01-25 | 2012-08-16 | Toyota Motor Corp | Ultrasonic measuring method, and ultrasonic measuring instrument |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03188390A (en) * | 1989-12-19 | 1991-08-16 | Touden Kogyo Kk | Measuring method of sticking state of marine life inside piping |
| KR100883512B1 (en) * | 2002-10-02 | 2009-02-17 | 주식회사 포스코 | Sensing and eliminating apparatus of scale sticked on the dust pipe |
| JP2012154744A (en) * | 2011-01-25 | 2012-08-16 | Toyota Motor Corp | Ultrasonic measuring method, and ultrasonic measuring instrument |
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