CN106885849B - A kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo - Google Patents
A kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo Download PDFInfo
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- CN106885849B CN106885849B CN201710083559.9A CN201710083559A CN106885849B CN 106885849 B CN106885849 B CN 106885849B CN 201710083559 A CN201710083559 A CN 201710083559A CN 106885849 B CN106885849 B CN 106885849B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4454—Signal recognition, e.g. specific values or portions, signal events, signatures
Abstract
The present invention relates to pipe ultrasonic guided wave field of non destructive testing, in particular to a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo, the present invention passes through in pipeline different parts placement sensor, obtain two or more detection signals, it is to be excluded with reference to translational alignment is carried out to unjustified signal, that is, spurious signal with any known associated echoes；The spurious echo as caused by direction controlling and multipath reflection in pipe ultrasonic Guided waves signal can be effectively eliminated using this method, improves the accuracy of flaw indication evaluation, to reduce the position of reinspection, improves the efficiency of pipe ultrasonic Guided waves.
Description
Technical field
The present invention relates to pipe ultrasonic guided wave field of non destructive testing, in particular to a kind of pipe ultrasonic Guided waves falseness is returned
The multi-point sampler method for removing of wave.
Background technique
Pipeline is a kind of important conveying equipment in oil gas transport and industrial production, due to high temperature, low temperature, high pressure or has corruption
The operating condition of the complexity such as corrosion medium, pipeline are easy to produce defect in use, for the safe handling for ensuring pipeline, lead to
Its structural health is evaluated frequently with macro -graph and the method for non-destructive testing, pipeline have distance it is long, it is aerial or
Buried-pipe laying has the features such as clad, and the method for generalling use sight check and local non-destructive testing at present ensures safety, but
Not only efficiency is lower for these methods, also increases inspection cost when having the pipeline inspection of clad.Ultrasonic guided wave detecting skill
Art is a kind of novel pipeline non-destructive testing technology, it is small using low-frequency guided wave energy attenuation, and the remote characteristic of propagation distance is not necessarily to
Stripping duct wrap layer can realize that tens of meters of ranges two-way to pipeline, the quick of full fault of construction are determined in single probe position
Position improves checkability, reduces inspection cost, therefore in pipeline by combining local detection method to carry out reinspection investigation
It has a good application prospect in detection.Pipe ultrasonic Guided waves signal is shown usually in the form of distance-wave amplitude, due to inspection
Ranging is from longer, therefore the information redundancy amount that signal includes is larger, wherein not only comprising flaw echo caused by defect reflection and
Associated echoes caused by the feature structures such as weld seam, flange, branch pipe, bracket, at the same include due to sensor orientation control it is bad or
A large amount of spurious echos caused by multipath reflection, to obtain accurate defect information, need to return correlation in signal analysis process
Involve spurious echo to be excluded.Associated echoes can generally be marked reflection signal by the comparison with conduit line map, and empty
False echo quantity is more, and frequency spectrum is similar with flaw echo, associated echoes frequency spectrum, cannot be gone using the method for time-frequency denoising
It removes, the method locally reviewed together with flaw indication is mostly used to be excluded at present, seriously affect the accurate of flaw indication
Differentiate, reduce detection efficiency, therefore, the exclusion of spurious signal has weight to accurately assessing for pipe ultrasonic Guided waves signal
Want meaning.
Summary of the invention
For solve the problems, such as drawbacks described above and, the present invention passes through in pipeline different parts placement sensor, obtains two or two
It is a it is above detect signal, with any known associated echoes be with reference to carrying out translational alignment, to unjustified signal, that is, spurious signal into
Row excludes；Propose a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo.
To achieve the above object and the technical solution adopted is that: a kind of multiple spot of pipe ultrasonic Guided waves spurious echo is surveyed
Try method for removing, which comprises the following steps:
A. different location installs supersonic guide-wave sensor on the outside of tested pipeline, is effectively examined using internal loopback pattern acquiring
The detection signal MsS1 and detection signal MsS2 in range are surveyed, detection sensor center spacing d twice is measured；
B. determine valid analysing range in theoretical maximum detecting distance；The calculation method of theoretical maximum detecting distance are as follows: R
≈ [50-6+20log (0.01 β)]/2 α, wherein R is maximum detecting distance, and β is the detection sensitivity of standard value or pre-set value,
α is attenuation rate；
C. attenuation rate is determined；It is obtained on tested pipeline using a hair one receipts mode actual measurement of ultrasonic guided wave detecting system；
Test method is that supersonic guide-wave emission sensor is installed on pipeline straight pipe, emits on straight pipe apart from supersonic guide-wave and senses
Supersonic guide-wave receiving sensor is installed at device x1, records wave amplitude A1, installation is super again at supersonic guide-wave emission sensor x2
Guided Waves receiving sensor records wave amplitude A2, attenuation rate α=[20log (A1/A2)]/(x2-x1)；
D. detection signal MsS1 and detection signal MsS2 are arranged apart from gain compensation, gain compensation numerical value etc. according to attenuation rate
In the product of distance and attenuation rate；
E. the echo of pipeline feature structure is as Control echo at include using in valid analysing range at least one；
It f., cannot be right by MsS2 translation center-spaced distance by two signal alignments on the basis of detecting signal MsS1
Neat signal is spurious signal.
Further, the guided wave in the step d can not by pipeline feature structure include: flange, pipe end, elbow,
Weld seam known to expansion joint, valve or position or branch pipe.
Further, the center sensor spacing d detected twice in the step a should be 0.5~1m, to guarantee twice
Identical check frequency can be covered；
Further, the direction translated in the step e is determined by detecting the alignment of the Control echo in signal twice.
Further, the detection signal of the acquisition can use rf wave or detection form, when using radio frequency wave mode,
Spurious signal can be excluded by superposed average after detecting signal alignment twice, when using detection form, can will test signal 2
Unjustified signal is manually excluded after being aligned after reversion with detection signal 1.
The beneficial effects of the present invention are: can be effectively eliminated in pipe ultrasonic Guided waves signal using this method by direction
Spurious echo caused by control and multipath reflection, improves the accuracy of flaw indication evaluation, to reduce the position of reinspection, improves
The efficiency of pipe ultrasonic Guided waves.
Detailed description of the invention
Attached drawing 1 is the detection sensor and detection range schematic diagram of the embodiment of the present invention；
Attached drawing 2 is the pipe detection signal MsS1 schematic diagram of the embodiment of the present invention；
Attached drawing 3 is the pipe detection signal MsS2 schematic diagram of the embodiment of the present invention；
Attached drawing 4 be the embodiment of the present invention with pipe end be with reference to translational alignment after signal schematic representation；
Specific embodiment
The present invention will be further described below with reference to the drawings, below only specific embodiments of the present invention, and unlimited
Due to the range that the present invention is protected.
Pipe fitting as shown in Fig. 1, wherein 1 represent pipeline feature structure (both guided wave can not by pipeline feature structure)；
2,3,4,5 the detection defect in pipeline is represented；It 6, is the end of pipeline；
A kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo, which is characterized in that including following step
It is rapid:
A. different location installs supersonic guide-wave sensor on the outside of tested pipeline, is effectively examined using internal loopback pattern acquiring
The detection signal MsS1 (see attached drawing 2) in range and detection signal MsS2 (see attached drawing 3) are surveyed, detection sensor center twice is measured
Spacing d；(see position in attached drawing 1)
B. determine valid analysing range in theoretical maximum detecting distance；The calculation method of theoretical maximum detecting distance are as follows: R
≈ [50-6+20log (0.01 β)]/2 α, wherein R is maximum detecting distance, and β is the detection sensitivity of pre-set value (it was found that small lack
Sunken ability passes through user's sets itself), α is attenuation rate；
C. attenuation rate is determined；It is obtained on tested pipeline using a hair one receipts mode actual measurement of ultrasonic guided wave detecting system；
Test method is that supersonic guide-wave emission sensor is installed on pipeline straight pipe, emits on straight pipe apart from supersonic guide-wave and senses
Supersonic guide-wave receiving sensor is installed at device x1, records wave amplitude A1, installation is super again at supersonic guide-wave emission sensor x2
Guided Waves receiving sensor records wave amplitude A2, attenuation rate α=[20log (A1/A2)]/(x2-x1)；
D. detection signal MsS1 and detection signal MsS2 are arranged apart from gain compensation (with the increasing of distance according to attenuation rate
Greatly, there can be decaying, that is, the same defect echo caused by remoter position is smaller, but scarce in order to reflect
Sunken size allow an equal amount of defect reflection wave amplitude be it is the same, if reflection wave amplitude it is different we by not knowing if echo
Road defect is great on earth, therefore sets gain compensation to solve this problem), and gain compensation numerical value is equal to distance and declines
The product of lapse rate；
E. using the echo of the bent tube section (guided wave can not by pipeline feature structure) in attached drawing 1 as Control echo；
It f., cannot be right by MsS2 translation center-spaced distance by two signal alignments on the basis of detecting signal MsS1
Neat signal is spurious signal (see X1 and X2 in attached drawing 4)；To complete the exclusion to spurious echo.
Claims (5)
1. a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo, which comprises the following steps:
A. different location installs supersonic guide-wave sensor on the outside of tested pipeline, effectively detects model using internal loopback pattern acquiring
Detection signal MsS1 and detection signal MsS2 in enclosing, measure detection sensor center spacing d twice；
B. determine valid analysing range in maximum detecting distance；The calculation method of maximum detecting distance are as follows: R ≈ [50-6+
20log (0.01 β)]/2 α, wherein R is maximum detecting distance, and β is the detection sensitivity of standard value or pre-set value, and α is decaying
Rate；
C. attenuation rate is determined；It is obtained on tested pipeline using a hair one receipts mode actual measurement of ultrasonic guided wave detecting system；Test
Method is that supersonic guide-wave emission sensor is installed on pipeline straight pipe, apart from supersonic guide-wave emission sensor x1 on straight pipe
Place's installation supersonic guide-wave receiving sensor, records wave amplitude A1, and installation ultrasound is led again at supersonic guide-wave emission sensor x2
Wave receiving sensor records wave amplitude A2, attenuation rate α=[20log (A1/A2)]/(x2-x1)；
D. detection signal MsS1 and detection signal MsS2 are arranged apart from gain compensation according to attenuation rate, gain compensation numerical value be equal to away from
From the product with attenuation rate；
E. the echo of pipeline feature structure is as Control echo at include using in valid analysing range at least one；
F. it on the basis of detecting signal MsS1, by MsS2 translation center-spaced distance by two signal alignments, cannot be aligned
Signal is spurious signal.
2. a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo according to claim 1, special
Sign is: guided wave in the step d can not by pipeline feature structure include: flange, pipe end, elbow, expansion joint, valve
Or weld seam or branch pipe known to position.
3. a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo according to claim 1, special
Sign is: the center sensor spacing d detected twice in the step a should be 0.5~1m.
4. a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo according to claim 1, special
Sign is: the direction translated in the step e is determined by detecting the alignment of the Control echo in signal twice.
5. a kind of multi-point sampler method for removing of pipe ultrasonic Guided waves spurious echo according to claim 1, special
Sign is: the detection signal of the acquisition can use rf wave or detection form, and when using radio frequency wave mode, spurious signal can
It is excluded by superposed average after detecting signal alignment twice, when using detection form, after signal MsS2 reversion can be will test
Unjustified signal is manually excluded after being aligned with detection signal MsS1.
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| CN110231401B (en) * | 2019-05-05 | 2021-10-26 | 四川升拓检测技术股份有限公司 | Inter-measuring point information correlation method and civil structure nondestructive testing method |
| CN111380962A (en) * | 2020-05-12 | 2020-07-07 | 国家电网有限公司 | Test method for highest monitoring sensitivity and resolution of ultrasonic guided waves at elbow pipeline |
Citations (4)
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|---|---|---|---|---|
| CN1089036A (en) * | 1992-07-02 | 1994-07-06 | 川德技术公司 | Be used to eliminate the Range Measurement System of the falseness indication of range observation |
| CN1668898A (en) * | 2002-07-19 | 2005-09-14 | Vega格里沙贝两合公司 | Method and device for determining an expectancy range for a level echo and a spurious echo |
| CN104458913A (en) * | 2014-12-17 | 2015-03-25 | 厦门大学 | Nonlinear guide wave evaluation method and nonlinear guide wave evaluation device of material performance degradation |
| CN105351322A (en) * | 2015-12-08 | 2016-02-24 | 国网新源张家口风光储示范电站有限公司 | Test block for bolt ultrasonic testing and bolt ultrasonic testing method and device |
-
2017
- 2017-02-16 CN CN201710083559.9A patent/CN106885849B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089036A (en) * | 1992-07-02 | 1994-07-06 | 川德技术公司 | Be used to eliminate the Range Measurement System of the falseness indication of range observation |
| CN1668898A (en) * | 2002-07-19 | 2005-09-14 | Vega格里沙贝两合公司 | Method and device for determining an expectancy range for a level echo and a spurious echo |
| CN104458913A (en) * | 2014-12-17 | 2015-03-25 | 厦门大学 | Nonlinear guide wave evaluation method and nonlinear guide wave evaluation device of material performance degradation |
| CN105351322A (en) * | 2015-12-08 | 2016-02-24 | 国网新源张家口风光储示范电站有限公司 | Test block for bolt ultrasonic testing and bolt ultrasonic testing method and device |
Non-Patent Citations (1)
| Title |
|---|
| 管道衰减系数对超声导波检测距离的影响;刘争 等;《无损检测》;20170110;第39卷(第1期);第61-65 |
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