CN108562643A - A kind of supersonic detection method for hydraulic pipe connector circumferential crack - Google Patents
A kind of supersonic detection method for hydraulic pipe connector circumferential crack Download PDFInfo
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- CN108562643A CN108562643A CN201810304711.6A CN201810304711A CN108562643A CN 108562643 A CN108562643 A CN 108562643A CN 201810304711 A CN201810304711 A CN 201810304711A CN 108562643 A CN108562643 A CN 108562643A
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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
- G01N29/04—Analysing solids
- G01N29/048—Marking the faulty objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
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Abstract
The present invention relates to a kind of supersonic detection methods for hydraulic pipe connector circumferential crack, belong to technical field of nondestructive testing.The present invention is using the contact measurement system for including multiple path ultrasonic flaw detector, surface wave probe, probe gripper, and using ultrasonic surface wave, the detection of situ contact formula is realized to hydraulic pipe connector circumferential crack.It selects the pipe joint with detection object same specification to make comparison exemplar first, then cover type inspection to circumferential crack artificial defect to meet design requirement；Secondly sensitivity calibration is carried out using comparison exemplar；The detection of hydraulic pipe is finally realized using the sensitivity after calibration.The detection of the conduit of no liquid medium and hydraulically full medium may be implemented by the selection of frequency probe by the present invention, meet the quality control in conduit production phase and in-service stage, and this method is simple and fast, have many advantages, such as that operability is strong, testing result is intuitive.
Description
Technical field
The present invention relates to a kind of supersonic detection methods for hydraulic pipe connector circumferential crack, belong to non-destructive testing technology
Field.
Background technology
The application of hydraulic system can be related to from high-precision aerospace industry to the speed reducer industry on basis, and liquid
Press conduit as the pipeline for connecting each section Hydraulic Elements in hydraulic system, transmission hydraulic oil is as medium to which driving is each
A Hydraulic Elements work, just as the blood vessel in human body by blood from heart is transported to each organ.Therefore, hydraulic pipe
One of most important work in this system is carry, often defect small on conduit leads to pressure reduction, conduit when serious
Rupture causes to leak, if uncontrolled will lead to catastrophic consequence.
The caliber of aviation hydraulic pipe is smaller, generally in 20mm hereinafter, its tube wall only has 10% or so of caliber, in addition to
It can contain outside self-defect during manufacturing, stress will be generated after pipe joint and pipe sleeve elastic conjunction.Hydraulic pipe connector by
Circumferential fatigue crack is will produce under long-term stress or the heterogeneity effect of itself, fatigue crack is after circumferentially extension to a certain degree
It can prolong and continue to extend in 45 ° of angles with axial, eventually lead to hydraulic pipe fracture.Therefore, hydraulic pipe connector is being manufactured
The safety in stage and in-service stage has to ensure.
In the fabrication stage of hydraulic pipe, it is contemplated that manufacturing process and the defect type being also easy to produce, generally use ultrasound are horizontal
Wave carries out radial cracking detection, and infiltration or the reinspection of magnetic powder are carried out again after finding defect.But shear wave is by workpiece surface roughness
Be affected, may cause to judge by accident；Osmosis requires surface smoothness high, because rough surface can cover lacking for tiny dispersion
It falls into, it is difficult to detect the product that surface is seriously worn；Magnetic powder inspection is only suitable for detecting ferrimagnet.In the in-service rank of hydraulic pipe
Section, is detected under the conditions of needing in situ, is examined in the case of with greater need for without hydraulic oil in conduit and full of hydraulic oil
It surveys, in addition, from safety and economically considering, hydraulic pipe cannot be dismantled often, while have connection accessory around pipe joint, this
So that shear wave, infiltration or magnetic powder method are restricted.
Invention content
The problem of existing in the detection for the prior art, the present invention provides one kind circumferentially to split for hydraulic pipe connector
The supersonic detection method of line realizes the quality control to hydraulic pipe connector fabrication stage and its in-service stage, has operable
The advantages that property is strong, testing result is intuitive.
The present invention achieves the above technical objects by the following technical means：
Using one include multiple path ultrasonic flaw detector, surface wave probe, probe gripper contact measurement system,
It is characterized in that：In the enterprising line sensitivity calibration of comparison exemplar, ultrasound detection then is carried out to hydraulic pipe connector, including following several
A step：
Step 1: comparison exemplar makes
Comparison exemplar pipe joint is made, the specification for comparing the material of exemplar pipe joint is identical as detected object, point
Processing is circumferential on the circumference of pipe wall position not residing for the catheter end of the angles R of comparison exemplar pipe joint and pipe joint splits
Line, two crackles comparison exemplar pipe joint circumferential direction in 180 ° distribution, crack width 0.1mm~0.15mm, length and
Depth is processed according to the design requirement of comparison exemplar, and then cover type to crackle examines, and judges whether are crack width and depth
Meet design requirement, if not meeting, re-starts making；
Step 2: detection sensitivity is calibrated
The surface wave probe 4 consistent with detected catheter surface curvature is selected, the arc length of each chip of popping one's head in is conduit
Combination of two of popping one's head in is then attached in probe gripper by the 1/4 of perimeter, and probe wire is connect with multiple path ultrasonic flaw detector；
Couplant is coated in detecting head surface, by 4 probe clips in comparison exemplar pipe joint, the positioning device of probe gripper and comparison
The pipe sleeve of exemplar pipe joint contacts, and comparison exemplar pipe joint is directed toward in the Acoustic Wave Propagation direction of probe；It wipes away more around probe
Remaining couplant adjusts indication range and amplitude size of the echo-signal of crackle on defectoscope, while adjusting detection frequency, when
When comparing gassy in exemplar pipe joint, detection frequency is 2.5-5MHz, and hydraulic pressure is full of in exemplar pipe joint when comparing
When oily, detection frequency is 5-8MHz, makes the tube wall position residing for the angles R of comparison exemplar pipe joint and the catheter end of pipe joint
The echo-signal for setting crackle shows that then, it is logical that rotating detector observes other two respectively on two different channels of defectoscope
Whether road shows crackle echo-signal identical with both of the aforesaid channel, and the echo signal amplitude of crackle is adjusted to flooding respectively
80%, record the echo position and yield value of flaw indication, led this echo position and yield value as detection hydraulic pressure
The benchmark of the crackle of pipe wall position residing for the angles R of pipe fitting and the catheter end of pipe joint；
Step 3: hydraulic pipe tool joint monitor
Using 4 probes selected in step 2, the arc length of each upper chip of probe is the 1/4 of conduit perimeter, will be visited
Head combination of two, is then attached in probe gripper, probe wire is connect with multiple path ultrasonic flaw detector；It is coated in detecting head surface
Couplant, by 4 probe clips on hydraulic pipe connector, the positioning device of probe gripper is socketed with the pipe of hydraulic pipe connector
It touches, hydraulic pipe connector is directed toward in the Acoustic Wave Propagation direction of probe；It wipes extra couplant around probe away, detects hydraulic pipe connector
The angles R and pipe joint catheter end residing for pipe wall position on whether have the echo-signal of crackle, if the letter of echo position
Number amplitude is more than the crackle benchmark described in step 2, then is determined as defect.
Used detection method is surface wave contact measurement.
When comparing gassy in exemplar pipe joint, detection frequency is 5MHz.
When comparing in exemplar pipe joint full of hydraulic oil, detection frequency is 7.5MHz.
The present invention has the advantage that and advantageous effect：
1), the present invention proposes a kind of detection for the structural complexity of hydraulic pipe connector and the limitation of existing detection technique
Method realizes the situ contact formula detection to hydraulic joint, is controlled so as to the circumferential crack to hydraulic pipe connector.
2), the present invention is detected hydraulic pipe connector using rayleigh waves inspection technology, and surface wave can be in the nearly table of product
Face is propagated, and the foreign matters such as the roughness of article surface and impurity do not interfere with Acoustic Wave Propagation substantially, since its own feature can led
It is detected under pipe assembled state, and need not dismounting conduit.
3), the present invention consider that hydraulic pipe curvature is big, tube wall is thin and pipe in no liquid medium and hydraulically full Jie
The factors such as matter, probe select cambered surface chip, the probe generate focused beam, compared with the diverging acoustic beam of plane wafer, have compared with
High detection signal-to-noise ratio.
4), the present invention judges defect by the echo signal amplitude on defectoscope screen compared with reference signal amplitude,
Easy to operate, testing result is intuitive, is easy to judge.
5), the present invention is disposably loaded by 4 probe combination of two directly about hydraulic pipe connector one week
Realize that hydraulic pipe tool joint monitor, detection efficiency are high.
Description of the drawings
Fig. 1 is a kind of achievable surface wave contact measurement system schematic.
Fig. 2 is probe gripper and probe combination diagram.
Fig. 3 is ARTIFICIAL CRACK Defect Comparison exemplar schematic diagram.
Fig. 4 is single channel flaw echo schematic diagram.
In figure：1. multiple path ultrasonic flaw detector, 2. surface wave probes, 3. probe grippers, 4. pipe sleeves, 5. hydraulic pipes connect
Head, 6. positioning devices, 7.R angular defects, 8. wall defects, 9. probe beginning waves, 10. wall defects echoes, 11.R angular defect echoes,
12, pipe joint end echo.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated.
A kind of supersonic detection method for hydraulic pipe connector circumferential crack, wherein including the angles R catheter end head and
Pipe wall position this section residing for the catheter end of pipe joint is known as pipe joint, and hydraulic pipe connector includes using a packet
The contact measurement system (see Fig. 1) for including multiple path ultrasonic flaw detector 1, surface wave probe 2, probe gripper 3, in comparison exemplar
Enterprising line sensitivity calibration, then carries out ultrasound detection, including following steps to hydraulic pipe connector 5：
Step 1: making comparison exemplar
Comparison exemplar pipe joint is made, the specification for comparing the material of exemplar pipe joint is identical as detected object, point
Processing is circumferential on the circumference of pipe wall position not residing for the catheter end of the angles R of comparison exemplar pipe joint and pipe joint splits
Line, two crackles are in the circumferential direction of comparison exemplar pipe joint in 180 ° of distributions, that is, and two crackles are opposite to be processed, (such as Fig. 3),
Crack width 0.1mm~0.15mm, length and depth are processed according to the design requirement of comparison exemplar, then carry out covering type to crackle
It examines, judges whether crack width and depth meet design requirement, if not meeting, re-start making；
Step 2: detection sensitivity is calibrated
Such as Fig. 2,4 surface wave probes 2 consistent with detected catheter surface curvature, the arc length of each chip of popping one's head in are selected
It is the 1/4 of conduit perimeter, combination of two of popping one's head in is then attached in probe gripper 3, probe wire and channel ultrasonic wave inspection
Instrument 1 connects；Couplant is coated in detecting head surface, by 4 probe clips in comparison exemplar pipe joint, the positioning of probe gripper fills
It sets 6 to contact with the pipe sleeve 4 of comparison exemplar pipe joint, comparison exemplar pipe joint is directed toward in the Acoustic Wave Propagation direction of probe；It wipes away
Extra couplant, adjusts indication range and amplitude size of the echo-signal of crackle on defectoscope, adjusts simultaneously around probe
Frequency is detected, when comparing gassy in exemplar pipe joint, detection frequency is 2.5-5MHz, when comparison exemplar pipe joint
It is interior be full of hydraulic oil when, detection frequency be 5-8MHz, make the R chinks line 7 of comparison exemplar pipe joint and the pipe sleeve of pipe joint
The echo-signal on pipe wall position crackle 8 residing for end shows that then, rotation is visited respectively on two different channels of defectoscope
Head observes whether other two channel shows crackle echo-signal identical with both of the aforesaid channel, by the echo-signal width of crackle
Degree is adjusted to the 80% of flooding respectively, records the echo position and yield value of flaw indication, by this echo position and yield value point
Benchmark not as the crackle of the pipe wall position residing for the angles R of detection hydraulic pipe connector and the catheter end of pipe joint；
Step 3: hydraulic pipe tool joint monitor
Using selected 4 probes 2 in step 2, the arc length of each chip of popping one's head in is the 1/4 of conduit perimeter, will pop one's head in two
Two combinations, are then attached in probe gripper 3, probe wire is connect with multiple path ultrasonic flaw detector 1；Coupling is coated in detecting head surface
Mixture, by 4 probe clips on hydraulic pipe connector, the positioning device 6 of probe gripper connects with the pipe sleeve 4 of hydraulic pipe connector
It touches, hydraulic pipe connector is directed toward in the Acoustic Wave Propagation direction of probe；It wipes extra couplant around probe away, detects hydraulic pipe connector
The angles R and pipe joint catheter end residing for pipe wall position on whether have the echo-signal of crackle, if defective echo,
Signal characteristic on defectoscope screen is as follows：The probe beginning wave 9 of screen left end, the pipe joint end echo of screen right end
Wall defects echo 10 between 12 and beginning wave and end echo and R angular defects echo 11；(see Fig. 4) is if wall defects are returned
The signal amplitude of wave 10 and R angular defects echo 11 is more than the crackle benchmark described in step 2, then is determined as defect.
Embodiment 1
The diameter 8mm of stainless steel hydraulic pipe, wall thickness 0.8mm, need to detect hydraulic pipe connector R corner bit length 4mm,
The circumferential crack of pipe wall position length 3mm, depth 0.1mm residing for depth 0.2mm and the catheter end of pipe joint, detection
Steps are as follows：
Step 1: comparison exemplar makes
Diameter 8mm is selected, the stainless steel hydraulic pressure pipe joint of wall thickness 0.8mm makes comparison exemplar, using electric spark cutting
At the circumferential crack of hydraulic pipe connector R angle processing length 4mm, depth 0.2mm, width 0.15mm, the pipe sleeve end of pipe joint
The circumferential crack of the residing pipe wall position processing circumferential crack length 3mm in end, depth 0.1mm, width 0.15mm, two crackles exist
It compares in the circumferential direction of exemplar pipe joint in 180 ° of distributions, crackle depth and width is carried out to cover type inspection, are made after meeting the requirements
To compare exemplar.
Step 2: detection sensitivity is calibrated
The surface wave probe 4 consistent with detected catheter surface curvature is selected, the arc length of each chip of popping one's head in is conduit
Combination of two of popping one's head in is then attached in probe gripper by the 1/4 of perimeter, and probe wire is connect with multiple path ultrasonic flaw detector；
Couplant is coated in detecting head surface, by 4 probe clips in comparison exemplar pipe joint, the positioning device of probe gripper and comparison
The pipe sleeve of exemplar pipe joint contacts, and comparison exemplar pipe joint is directed toward in the Acoustic Wave Propagation direction of probe；It wipes away more around probe
Remaining couplant adjusts indication range and amplitude size of the echo-signal of crackle on defectoscope, while adjusting detection frequency, this
When comparison exemplar pipe joint in gassy when, detection frequency be selected as 5MHz, make the angles R and the conduit of comparison exemplar pipe joint
The echo-signal of crackle is shown respectively on two different channels of defectoscope in pipe wall position residing for the catheter end of connector, so
Afterwards, rotating detector observes whether other two channel shows crackle echo-signal identical with both of the aforesaid channel, by crackle
Echo signal amplitude is adjusted to the 80% of flooding respectively, records the echo position and yield value of flaw indication, by this echo position
With yield value respectively as the crackle of the pipe wall position residing for the angles R of detection hydraulic pipe connector and the catheter end of pipe joint
Benchmark；
Step 3: hydraulic pipe tool joint monitor
Using selected probe 4 in step 2, the arc length of each chip of popping one's head in is the 1/4 of conduit perimeter, will pop one's head in two
Two combinations, are then attached in probe gripper, probe wire is connect with multiple path ultrasonic flaw detector；It coats and couples in detecting head surface
Agent, by 4 probe clips on hydraulic pipe connector, the positioning device of probe gripper is contacted with the pipe sleeve of hydraulic pipe connector, is visited
It is directed toward hydraulic pipe connector in the Acoustic Wave Propagation direction of head；It wipes extra couplant around probe away, detects the angles R of hydraulic pipe connector
Whether the echo-signal of crackle is had in pipe wall position residing for catheter end with pipe joint, if the signal amplitude of echo position
More than the crackle benchmark described in step 2, then it is determined as defect.
Embodiment 2
The diameter 12mm of stainless steel hydraulic pipe, wall thickness 1.2mm need to detect the corners hydraulic pipe connector R bit length
The circumferential crack of pipe wall position length 3mm, depth 0.1mm residing for the catheter end of 4mm, depth 0.2mm and pipe joint,
Detecting step is as follows：
Step 1: comparison exemplar makes
Diameter 12mm is selected, the stainless steel hydraulic pressure pipe joint of wall thickness 1.2mm makes comparison exemplar, using electric spark cutting
At the circumferential crack of hydraulic pipe connector R angle processing length 4mm, depth 0.2mm, width 0.15mm, the pipe sleeve end of pipe joint
The circumferential crack of the residing pipe wall position processing circumferential crack length 3mm in end, depth 0.1mm, width 0.15mm, two crackles exist
It compares in the circumferential direction of exemplar pipe joint in 180 ° of distributions, crackle depth and width is carried out to cover type inspection, are made after meeting the requirements
To compare exemplar.
Step 2: detection sensitivity is calibrated
The surface wave probe 4 consistent with detected catheter surface curvature is selected, the arc length of each chip of popping one's head in is conduit
Combination of two of popping one's head in is then attached in probe gripper by the 1/4 of perimeter, and probe wire is connect with multiple path ultrasonic flaw detector；
Couplant is coated in detecting head surface, by 4 probe clips in comparison exemplar pipe joint, the positioning device of probe gripper and comparison
The pipe sleeve of exemplar pipe joint contacts, and comparison exemplar pipe joint is directed toward in the Acoustic Wave Propagation direction of probe；It wipes away more around probe
Remaining couplant adjusts indication range and amplitude size of the echo-signal of crackle on defectoscope, while adjusting detection frequency, this
When comparison exemplar pipe joint internal-filling liquid pressure oil when, detection frequency be selected as 7.5MHz, make comparison exemplar pipe joint the angles R and lead
The echo-signal of crackle is shown respectively on two different channels of defectoscope in pipe wall position residing for the catheter end of pipe fitting,
Then, rotating detector observes whether other two channel shows crackle echo-signal identical with both of the aforesaid channel, by crackle
Echo signal amplitude be adjusted to the 80% of flooding respectively, the echo position and yield value of flaw indication are recorded, by this echo position
Set the splitting respectively as the pipe wall position residing for the angles R of detection hydraulic pipe connector and the catheter end of pipe joint with yield value
The benchmark of line；
Step 3: hydraulic pipe tool joint monitor
Using selected probe 4 in step 2, the arc length of each chip of popping one's head in is the 1/4 of conduit perimeter, will pop one's head in two
Two combinations, are then attached in probe gripper, probe wire is connect with multiple path ultrasonic flaw detector；It coats and couples in detecting head surface
Agent, by 4 probe clips on hydraulic pipe connector, the positioning device of probe gripper is contacted with the pipe sleeve of hydraulic pipe connector, is visited
It is directed toward hydraulic pipe connector in the Acoustic Wave Propagation direction of head；It wipes extra couplant around probe away, detects the angles R of hydraulic pipe connector
Whether the echo-signal of crackle is had in pipe wall position residing for catheter end with pipe joint, if the signal amplitude of echo position
More than the crackle benchmark described in step 2, then it is determined as defect.
The embodiment is the preferred embodiments of the present invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification all belongs to the scope of protection of the present invention.
Claims (4)
1. a kind of supersonic detection method for hydraulic pipe connector circumferential crack includes channel ultrasonic wave inspection using one
The contact measurement system of instrument (1), surface wave probe (2), probe gripper (3), it is characterised in that：Spirit is carried out on comparison exemplar
Sensitivity is calibrated, and then carries out ultrasound detection, including following steps to hydraulic pipe connector (5)：
Step 1: comparison exemplar makes
Comparison exemplar pipe joint is made, the specification for comparing the material of exemplar pipe joint is identical as detected object, exists respectively
It compares and processes circumferential crack on the circumference of the pipe wall position residing for the angles R of exemplar pipe joint and the catheter end of pipe joint,
Two crackles are in the circumferential direction of comparison exemplar pipe joint in 180 ° of distributions, crack width 0.1mm~0.15mm, length and depth
According to the design requirement processing of comparison exemplar, then crackle is carried out to cover type inspection, judges whether crack width and depth meet
Design requirement re-starts making if not meeting；
Step 2: detection sensitivity is calibrated
The surface wave probe (2) 4 consistent with detected catheter surface curvature is selected, the arc length of each chip of popping one's head in is conduit week
Combination of two of popping one's head in is then attached in probe gripper (3) by long 1/4, probe wire and multiple path ultrasonic flaw detector (1)
Connection；Couplant is coated in detecting head surface, by 4 probe clips in comparison exemplar pipe joint, the positioning device of probe gripper
(6) it is contacted with the pipe sleeve (4) of comparison exemplar pipe joint, comparison exemplar pipe joint is directed toward in the Acoustic Wave Propagation direction of probe；It wipes
Extra couplant around probe is removed, indication range and amplitude size of the echo-signal of crackle on defectoscope is adjusted, adjusts simultaneously
Whole detection frequency, when comparing gassy in exemplar pipe joint, detection frequency is 2.5-5MHz, when comparison exemplar conduit connects
When being full of hydraulic oil in head, detection frequency is 5-8MHz, makes the catheter end at the angles R and pipe joint of comparison exemplar pipe joint
The echo-signal of crackle shows that then, rotating detector is seen respectively on two different channels of defectoscope in residing pipe wall position
Examine whether other two channel shows crackle echo-signal identical with both of the aforesaid channel, by the echo signal amplitude of crackle point
It is not adjusted to the 80% of flooding, records the echo position and yield value of flaw indication, this echo position and yield value is made respectively
For the benchmark of the crackle of the pipe wall position residing for the angles R of detection hydraulic pipe connector and the catheter end of pipe joint；
Step 3: hydraulic pipe tool joint monitor
Using 4 probes (2) selected in step 2, the arc length of each upper chip of probe is the 1/4 of conduit perimeter, will be popped one's head in
Combination of two is then attached in probe gripper (3), and probe wire is connect with multiple path ultrasonic flaw detector (1)；In detecting head surface
Couplant is coated, by 4 probe clips on hydraulic pipe connector, positioning device (6) and the hydraulic pipe connector of probe gripper
Pipe sleeve (4) contacts, and hydraulic pipe connector is directed toward in the Acoustic Wave Propagation direction of probe；It wipes extra couplant around probe away, detects liquid
Whether the pipe wall position R angle of pipe joint and the catheter end of pipe joint residing in have the echo-signal of crackle, if returning if pressing
The signal amplitude of wave position is more than the crackle benchmark described in step 2, then is determined as defect.
2. a kind of supersonic detection method for hydraulic pipe connector circumferential crack according to claim 1, feature
It is：Used detection method is surface wave contact measurement.
3. a kind of supersonic detection method for hydraulic pipe connector circumferential crack according to claim 1, feature
It is：When comparing gassy in exemplar pipe joint, detection frequency is 5MHz.
4. a kind of supersonic detection method for hydraulic pipe connector circumferential crack according to claim 1, feature
It is：When comparing in exemplar pipe joint full of hydraulic oil, detection frequency is 7.5MHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810304711.6A CN108562643B (en) | 2018-04-04 | 2018-04-04 | Ultrasonic detection method for circumferential cracks of hydraulic conduit joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810304711.6A CN108562643B (en) | 2018-04-04 | 2018-04-04 | Ultrasonic detection method for circumferential cracks of hydraulic conduit joint |
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| CN108562643B CN108562643B (en) | 2020-11-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836110A (en) * | 2008-03-31 | 2010-09-15 | 日本克劳特克雷默尔株式会社 | Ultrasonic flaw detection method and device thereof |
| CN105510441A (en) * | 2015-12-22 | 2016-04-20 | 北京欧宁航宇检测技术有限公司 | Linkage detection method adopting multi-channel combined probes |
| CN106224784A (en) * | 2016-09-09 | 2016-12-14 | 北京航空航天大学 | The ultrasonic nondestructive testing device of defect of pipeline |
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2018
- 2018-04-04 CN CN201810304711.6A patent/CN108562643B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836110A (en) * | 2008-03-31 | 2010-09-15 | 日本克劳特克雷默尔株式会社 | Ultrasonic flaw detection method and device thereof |
| CN105510441A (en) * | 2015-12-22 | 2016-04-20 | 北京欧宁航宇检测技术有限公司 | Linkage detection method adopting multi-channel combined probes |
| CN106224784A (en) * | 2016-09-09 | 2016-12-14 | 北京航空航天大学 | The ultrasonic nondestructive testing device of defect of pipeline |
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| Title |
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| 陈新波等: "某型飞机空速管的超声表面波检测", 《无损检测》 * |
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