CN103592366A - Method for detecting ultrasonic flaw detection - Google Patents
Method for detecting ultrasonic flaw detection Download PDFInfo
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- CN103592366A CN103592366A CN201310499090.9A CN201310499090A CN103592366A CN 103592366 A CN103592366 A CN 103592366A CN 201310499090 A CN201310499090 A CN 201310499090A CN 103592366 A CN103592366 A CN 103592366A
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- bottom hole
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Abstract
The invention discloses a method for detecting the ultrasonic flaw detection. The method aims to solve the problems that a calculation formula has multiple parameters and the calculation process is extremely complicated when a calculation method is used for the ultrasonic flaw detection. According to the method, the detection is performed by adopting a bottom wave method when the thickness of a detected part of a workpiece is larger than the length of a three-time near field region, and a decibel difference formula of echo acoustic pressures of large flat-bottom and flat-bottom holes with different distances is that DeltadB=20Lg(2lambda*12/Pid12*2); according to the method, the detection is performed by adopting a test block method when the thickness of the workpiece is smaller than the length of the three-time near field region, and a decibel difference formula of echo acoustic pressures of the flat-bottom holes with different diameters and distances is that DeltadB=40Lg(d12*22/d22*12). According to the method, the calculation efficiency can be improved by at least 5 times, and the calculation accuracy rate is 100 percent. The method can be applied to the calculation in the field of the ultrasonic flaw detection.
Description
Technical field
The present invention relates to a kind of method of checking UT (Ultrasonic Testing).
Background technology
UT (Ultrasonic Testing) is a kind of method of part defect that checks in the feature of interface edge generation reflection while utilizing the ultrasonic depths that penetrates metal material to enter another cross section by a cross section.When ultrasonic beam passes to metal inside from piece surface by probe, while running into defect and part bottom surface, just there is reflection wave respectively, on video screen, form pulse waveform, according to these pulse waveforms, can judge position and the size of defect.
The adjusting of flaw detection sensitivity and quantitatively of crucial importance to the accurate evaluation of testing result to defect in UT (Ultrasonic Testing), when thickness of workpiece is greater than 3 times of near field regions, many can the trying to achieve by computing method of equivalent size of flaw detection sensitivity or defect, the problem that yet computing method exists, and computing formula parameter is more, computation process is extremely complicated, is used computing method check UT (Ultrasonic Testing) to waste time and energy and easily make mistakes.
Summary of the invention
To the object of the invention is to use computing method check UT (Ultrasonic Testing) to have the problem that computing formula parameter is more, computation process is extremely complicated in order solving, a kind of method of checking UT (Ultrasonic Testing) to be provided.
A kind of method of checking UT (Ultrasonic Testing) of the present invention, described method is visited when position thickness is greater than 3 times of near-zone length and is adopted end ripple method to calculate at workpiece, and wherein the decibel difference formula of the large flat and flat-bottom hole echo acoustic pressure of different distance is:
△ dB=20Lg (2 λ X
1 2/ ∏ d
1 2x
2), wherein each parameter physical significance is described as follows:
λ=c/f, λ is wavelength (mm); C is velocity of wave: in steel, velocity of wave is 5900m/s; F is the frequency (MHz) of probe;
X
1the degree of depth (mm) for flat-bottom hole;
D
1for flat-bottom hole diameter (mm);
X
2for the large flat degree of depth (mm);
∏ is Defect Equivalent size (mm);
△ dB is yield value.
Described method adopts test block method to regulate flaw detection sensitivity when thickness of workpiece is less than 3 times of near field regions, in the artificial flat-bottom hole size of test block and practical work piece size when inconsistent, the two is converted to detect, also can carry out equivalent calculation to discovery defect, the decibel difference formula between the flat-bottom hole echo acoustic pressure of different-diameter and distance is:
△ dB=40Lg (d
1 2x
2 2/ d
2 2x
1 2), wherein each parameter physical significance is described as follows:
D
1, d
2for flat-bottom hole size (mm);
X
1, X
2for the flat-bottom hole degree of depth (mm).
The present invention comprises following beneficial effect:
The present invention needs only known wherein partial parameters can obtain last numerical value content, has reduced the time of calculating, and increases work efficiency.Same calculating, calculates than improving at least 5 times by counter counting yield by computer program, and can substantially get rid of the mistake that counter calculating formula human factor causes, the rate of accuracy reached 100% of calculating.
Accompanying drawing explanation
Fig. 1 is end ripple method check flaw detection procedure chart.
Fig. 2 is test block method check flaw detection procedure chart.
Fig. 3 is end ripple method check flaw detection procedure chart in embodiment mono-.
Fig. 4 is test block method check flaw detection procedure chart in embodiment bis-.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the combination in any between each embodiment.
Embodiment one: a kind of method of checking UT (Ultrasonic Testing) of present embodiment, described method is visited when position thickness is greater than 3 times of near-zone length and is adopted end ripple method to calculate at workpiece, and wherein the decibel difference formula of the large flat and flat-bottom hole echo acoustic pressure of different distance is:
△ dB=20Lg (2 λ X
1 2/ ∏ d
1 2x
2), wherein each parameter physical significance is described as follows:
λ=c/f, λ is wavelength (mm); C is velocity of wave: in steel, velocity of wave is 5900m/s; F is the frequency (MHz) of probe;
X
1the degree of depth (mm) for flat-bottom hole;
D
1for flat-bottom hole diameter (mm);
X
2for the large flat degree of depth (mm);
∏ is Defect Equivalent size (mm);
△ dB is yield value.
Above-mentioned formula is programmed, as shown in Figure 1.
Embodiment two: the method that a kind of UT (Ultrasonic Testing) of present embodiment is calculated, described method adopts test block method to regulate flaw detection sensitivity when thickness of workpiece is less than 3 times of near field regions, in the artificial flat-bottom hole size of test block and practical work piece size when inconsistent, the two is converted to detect, also can carry out equivalent calculation to discovery defect, the decibel difference formula between the flat-bottom hole echo acoustic pressure of different-diameter and distance is: △ dB=40Lg (d
1 2x
2 2/ d
2 2x
1 2), wherein each parameter physical significance is described as follows:
D
1, d
2for flat-bottom hole size (mm);
X1, X2 are the flat-bottom hole degree of depth (mm).
Above-mentioned formula is programmed, as shown in Figure 2.
By following examples, verify beneficial effect of the present invention:
Embodiment mono-: the dB value of the required gain of known defect equivalent calculation or known gain values are calculated the equivalent of defect.
As shown in Figure of description 3, if the known large flat degree of depth, frequency probe, then know that two in depth of defect, Defect Equivalent, yield value can be tried to achieve the 3rd.
Embodiment bis-: by test block method, determined flaw detection sensitivity or defect is carried out to equivalent calculation.
As shown in Figure of description 4, if the artificial reflecting body degree of depth, reflecting body size in known test block, then know that two in three can be tried to achieve another.
Claims (2)
1. a method of checking UT (Ultrasonic Testing), it is characterized in that described method is visited when position thickness is greater than 3 times of near-zone length and adopted end ripple method to calculate at workpiece, wherein the decibel difference formula of the large flat and flat-bottom hole echo acoustic pressure of different distance is: △ dB=20Lg (2 λ X
1 2/ ∏ d
1 2x
2), wherein each parameter physical significance is described as follows:
λ=c/f, λ is wavelength (mm); C is velocity of wave: in steel, velocity of wave is 5900m/s; F is the frequency (MHz) of probe;
X
1the degree of depth (mm) for flat-bottom hole;
D
1for flat-bottom hole diameter (mm);
X
2for the large flat degree of depth (mm);
∏ is Defect Equivalent size (mm);
△ dB is yield value.
2. a method of checking UT (Ultrasonic Testing), it is characterized in that described method adopts test block method to regulate flaw detection sensitivity when thickness of workpiece is less than 3 times of near field regions, in the artificial flat-bottom hole size of test block and practical work piece size when inconsistent, the two is converted to detect, also can carry out equivalent calculation to discovery defect, the decibel difference formula between the flat-bottom hole echo acoustic pressure of different-diameter and distance is: △ dB=40Lg (d
1 2x
2 2/ d
2 2x
1 2), wherein each parameter physical significance is described as follows:
D
1, d
2for flat-bottom hole size (mm);
X
1, X
2for the flat-bottom hole degree of depth (mm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499090.9A CN103592366A (en) | 2013-10-22 | 2013-10-22 | Method for detecting ultrasonic flaw detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499090.9A CN103592366A (en) | 2013-10-22 | 2013-10-22 | Method for detecting ultrasonic flaw detection |
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|---|---|
| CN103592366A true CN103592366A (en) | 2014-02-19 |
Family
ID=50082590
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374834A (en) * | 2014-11-13 | 2015-02-25 | 中国南方航空工业(集团)有限公司 | Sensitivity adjusting method of ultrasonic testing flaw detector and ultrasonic testing flaw detection method |
| CN113219060A (en) * | 2021-05-21 | 2021-08-06 | 建龙北满特殊钢有限责任公司 | Analysis method of counting type ultrasonic flaw detection measurement system |
| CN113671039A (en) * | 2021-07-31 | 2021-11-19 | 南京中车浦镇城轨车辆有限责任公司 | Polyurethane adhesive defect measuring method and system based on ultrasonic detection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788532A (en) * | 2010-02-11 | 2010-07-28 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic testing method used for large-sized complex forging |
-
2013
- 2013-10-22 CN CN201310499090.9A patent/CN103592366A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788532A (en) * | 2010-02-11 | 2010-07-28 | 中国航空工业集团公司北京航空材料研究院 | Ultrasonic testing method used for large-sized complex forging |
Non-Patent Citations (5)
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| 朱国辉等: "段坯超声波探伤智能化", 《华东冶金学院学报》, vol. 12, no. 1, 31 January 1995 (1995-01-31), pages 58 - 66 * |
| 沈玉娣: "《现代无损检测技术》", 31 July 2012, article "缺陷尺寸的评定", pages: 72 * |
| 沈玉娣: "《现代无损检测技术》", 31 July 2012, 西安交通大学出版社, article "缺陷尺寸的评定", pages: 72 * |
| 邓大勇: "钢板超声波检测基准灵敏度确定的诠释", 《青海电力》, 30 June 2008 (2008-06-30), pages 26 - 27 * |
| 郑中兴: "第四专题超声检测中缺陷的定量", 《无损检测》, vol. 16, no. 2, 28 February 1994 (1994-02-28), pages 52 - 57 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374834A (en) * | 2014-11-13 | 2015-02-25 | 中国南方航空工业(集团)有限公司 | Sensitivity adjusting method of ultrasonic testing flaw detector and ultrasonic testing flaw detection method |
| CN113219060A (en) * | 2021-05-21 | 2021-08-06 | 建龙北满特殊钢有限责任公司 | Analysis method of counting type ultrasonic flaw detection measurement system |
| CN113671039A (en) * | 2021-07-31 | 2021-11-19 | 南京中车浦镇城轨车辆有限责任公司 | Polyurethane adhesive defect measuring method and system based on ultrasonic detection |
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Application publication date: 20140219 |