CN103760235A - Ultrasonic flaw detection method for steel plate - Google Patents
Ultrasonic flaw detection method for steel plate Download PDFInfo
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- CN103760235A CN103760235A CN201410008675.0A CN201410008675A CN103760235A CN 103760235 A CN103760235 A CN 103760235A CN 201410008675 A CN201410008675 A CN 201410008675A CN 103760235 A CN103760235 A CN 103760235A
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- flaw detection
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- steel plate
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Abstract
The invention provides an ultrasonic flaw detection method for a steel plate. According to the ultrasonic flaw detection method, reflection waves of a plurality of probes under the lower surface of the steel plate are fitted into a signal; one fitted signal reflection wave is used for correcting a flaw detection trolley and the signal fitted by a plurality of probe reflection signals in the corrected flaw detection trolley is decomposed into independent reflection signals again to be displayed on a screen of the flaw detection trolley; the detection range of the flaw detection trolley is adjusted according to the thickness of a to-be-detected workpiece to detect the workpiece. According to the ultrasonic flaw detection method for the steel plate, the problems that steel plate bottom returned waves of a plurality of channels are fitted into one signal so that the monitoring of steel plate bottom returned wave signals is not accurate when the flaw detection trolley is used for carrying out flaw detection on the steel plate are solved; the defect condition of bottom wave disappearing can be judged through the observation and the identification of a plurality of signals; the flaw detection accuracy is greatly improved when the judgment of other defects is not influenced and a leak detection phenomenon is avoided.
Description
Technical field
The invention belongs to inspection assay technique field, particularly a kind of method detecting for steel-plate ultrasound wave inspection.
Background technology
For a long time, domestic Metallurgical Enterprise is used the manual flaw detection trolley of hyperchannel steel plate to carry out steel plate inspection check mostly, during flaw detection, pass through to adjust flaw detection trolley position, the steel plate Bottom echo signal of each passage is adjusted into the signal that reflection strength is identical, and on display screen, there is position same signal, so just, multi-channel detection signal fitting is become to a signal, due to this detection method for cause that ground-reflected wave disappears and other to reflect unconspicuous defect insensitive, therefore often cause steel plate Bottom echo signal monitoring inaccurate and occur undetected phenomenon.
Summary of the invention
The present invention aims to provide a kind of simple, can eliminate the signal echo monitoring of steel plate bottom surface inaccurate, avoids undetected phenomenon, improves the steel-plate ultrasound wave inspection method of flaw detection accuracy.
For this reason, the solution that the present invention takes is:
A kind of steel-plate ultrasound wave inspection method, that multiple probes are fitted to a signal at the reflection wave of lower surface of steel plate, by a returning echo after matching, flaw detection trolley is calibrated, and the signal that fits to of multiple probe reflected signals in the flaw detection trolley after calibration is resolved into independently reflected signal be again presented on instrument.Its concrete grammar and step are:
1, flaw detection trolley probe zero point correction: first, adjusting flaw detection trolley chromacoder is first passage probe distributing signal; Then first passage probe is put to CB II-2 test block upper surface, adjust flaw detection trolley indication range, make to demonstrate on flaw detection trolley the second-time-around echo of test block lower surface, according to zero point and the velocity of propagation of ultrasound wave in workpiece of the position correction probe of lower surface first reflection echo and second-time-around echo; Last zero point of calibrating according to the method described above other passage probes.
2, flaw detection trolley is placed on tested workpiece, adjusting chromacoder is first passage distributing signal, by first passage probe placement at tested workpiece surface, adjust flaw detection trolley indication range, flaw detection trolley demonstrates the first reflection echo of tested workpiece lower surface, utilize signal amplifier to adjust lower surface of steel plate echo height for the first time, make its 50% height that reaches display screen, then use identical way to adjust the end wave reflection height of other passage probes.
3, flaw detection trolley is placed on tested workpiece motionless, adjusts chromacoder, the first passage end wave reflection signal location detecting of popping one's head in is adjusted, and be target location by its set positions, adjust other channel signals and overlap with first passage signal.
4, according to steel plate inspection examination criteria, calibration system sensitivity.
5, adjust chromacoder, according to the method for step (3), again wave reflection signal location at the bottom of each passage is arranged in the distance of being convenient to observe.
6, according to the thickness of tested workpiece, adjust the sensing range of flaw detection trolley, workpiece is detected.
Described probe is four.
Beneficial effect of the present invention is:
When the present invention can effectively solve flaw detection trolley steel plate is detected a flaw, multichannel steel plate Bottom echo is fitted to a signal to be caused the inaccurate problem of steel plate Bottom echo signal monitoring, by the observation to multiple independent signals and identification, judge the defect situation that end ripple disappears, when not affecting other defect judgement, greatly improve flaw detection accuracy, avoid undetected phenomenon.
Embodiment
Take four-way flaw detection trolley as example, the invention will be further described below.
Steel-plate ultrasound wave inspection method of the present invention, mainly that four probes are fitted to a signal at the reflection wave of lower surface of steel plate, by a returning echo after matching, flaw detection trolley is calibrated, and four signals of fitting to of probe reflected signals in the flaw detection trolley after calibration are resolved into independently reflected signal be again presented on flaw detection trolley screen.Its concrete grammar and step are:
1, flaw detection trolley probe zero point correction: first, adjusting flaw detection trolley chromacoder is first passage probe distributing signal; Then first passage probe is put to CB II-2 test block upper surface, adjust flaw detection trolley indication range, make to demonstrate on flaw detection trolley the second-time-around echo of test block lower surface, according to zero point and the velocity of propagation of ultrasound wave in workpiece of the position correction probe of lower surface first reflection echo and second-time-around echo; Last zero point of calibrating according to the method described above other three passage probes.
2, flaw detection trolley is placed on tested workpiece, adjusting chromacoder is first passage distributing signal, by first passage probe placement at tested workpiece surface, adjust flaw detection trolley indication range, flaw detection trolley screen display goes out the first reflection echo of tested workpiece lower surface, utilize signal amplifier to adjust lower surface of steel plate echo height for the first time, make its 50% height that reaches display screen, then use identical way to adjust the end wave reflection height of other three passage probes.
3, flaw detection trolley is placed on tested workpiece motionless, adjust chromacoder, the first passage end wave reflection signal location detecting of popping one's head in is adjusted, and be target location by its set positions, adjust other three channel signals and overlap with first passage signal.
4, according to steel plate inspection examination criteria, calibration system sensitivity.
5, adjust chromacoder, according to the method for step 3, again wave reflection signal location at the bottom of each passage is arranged in the distance of being convenient to observe.
6, according to the thickness of tested workpiece, adjust the sensing range of flaw detection trolley, can carry out carrying out flaw detection to workpiece.
Claims (2)
1. a steel-plate ultrasound wave inspection method, it is characterized in that, multiple probes are fitted to a signal at the reflection wave of lower surface of steel plate, by a returning echo after matching, flaw detection trolley is calibrated, and the signal that fits to of multiple probe reflected signals in the flaw detection trolley after calibration is resolved into independently reflected signal be again presented on flaw detection trolley screen; Its concrete grammar and step are:
(1), flaw detection trolley probe zero point correction: first, adjusting flaw detection trolley chromacoder is first passage probe distributing signal; Then first passage probe is put to CB II-2 test block upper surface, adjust flaw detection trolley indication range, make to demonstrate on flaw detection trolley the second-time-around echo of test block lower surface, according to zero point and the velocity of propagation of ultrasound wave in workpiece of the position correction probe of lower surface first reflection echo and second-time-around echo; Last zero point of calibrating according to the method described above other passage probes;
(2), flaw detection trolley is placed on tested workpiece, adjusting chromacoder is first passage distributing signal, by first passage probe placement at tested workpiece surface, adjust flaw detection trolley indication range, flaw detection trolley demonstrates the first reflection echo of tested workpiece lower surface, utilize signal amplifier to adjust lower surface of steel plate echo height for the first time, make its 50% height that reaches display screen, then use identical way to adjust the end wave reflection height of other passage probes;
(3), flaw detection trolley is placed on tested workpiece motionless, adjust chromacoder, the first passage end wave reflection signal location detecting of popping one's head in is adjusted, and be target location by its set positions, adjust other channel signals and overlap with first passage signal;
(4), according to steel plate inspection examination criteria, calibration system sensitivity;
(5), adjust chromacoder, according to the method for step (3) again wave reflection signal location at the bottom of each passage is arranged on be convenient to observe distance on;
(6), according to the thickness of tested workpiece, adjust the sensing range of flaw detection trolley, workpiece is detected.
2. steel-plate ultrasound wave inspection method according to claim 1, is characterized in that, described probe is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410008675.0A CN103760235A (en) | 2014-01-09 | 2014-01-09 | Ultrasonic flaw detection method for steel plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410008675.0A CN103760235A (en) | 2014-01-09 | 2014-01-09 | Ultrasonic flaw detection method for steel plate |
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| CN103760235A true CN103760235A (en) | 2014-04-30 |
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| CN201410008675.0A Pending CN103760235A (en) | 2014-01-09 | 2014-01-09 | Ultrasonic flaw detection method for steel plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777238A (en) * | 2015-04-10 | 2015-07-15 | 上海和伍新材料科技有限公司 | Test block for low-voltage apparatus electric contact ultrasonic non-destructive test and calibration method thereof |
| CN105277614A (en) * | 2014-06-09 | 2016-01-27 | 鞍钢股份有限公司 | Replacing method for probe of automatic flaw detector |
Citations (4)
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| JP2003279550A (en) * | 2002-03-22 | 2003-10-02 | Kyoji Honma | Intelligent ultrasonic flaw detection system by utilizing neural network |
| CN1712951A (en) * | 2005-06-21 | 2005-12-28 | 吴来政 | Ultrasonic Rayleigh defects detector of train axle |
| CN101474079A (en) * | 2009-01-06 | 2009-07-08 | 华南理工大学 | Method and device for measuring acoustic impedance of living body based on ultrasound steady state reflection wave |
| CN202693526U (en) * | 2012-06-29 | 2013-01-23 | 张周平 | Ultrasonic automatic detecting apparatus for steel plate |
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2014
- 2014-01-09 CN CN201410008675.0A patent/CN103760235A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003279550A (en) * | 2002-03-22 | 2003-10-02 | Kyoji Honma | Intelligent ultrasonic flaw detection system by utilizing neural network |
| CN1712951A (en) * | 2005-06-21 | 2005-12-28 | 吴来政 | Ultrasonic Rayleigh defects detector of train axle |
| CN101474079A (en) * | 2009-01-06 | 2009-07-08 | 华南理工大学 | Method and device for measuring acoustic impedance of living body based on ultrasound steady state reflection wave |
| CN202693526U (en) * | 2012-06-29 | 2013-01-23 | 张周平 | Ultrasonic automatic detecting apparatus for steel plate |
Non-Patent Citations (1)
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| 徐庆元等: "高速铁路桥上无缝线路断轨力计算模型", 《交通运输工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277614A (en) * | 2014-06-09 | 2016-01-27 | 鞍钢股份有限公司 | Replacing method for probe of automatic flaw detector |
| CN104777238A (en) * | 2015-04-10 | 2015-07-15 | 上海和伍新材料科技有限公司 | Test block for low-voltage apparatus electric contact ultrasonic non-destructive test and calibration method thereof |
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Application publication date: 20140430 |