CN104614443B - Rail vehicle wheel tread flat supersonic detection method and device based on boundary wave - Google Patents
Rail vehicle wheel tread flat supersonic detection method and device based on boundary wave Download PDFInfo
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- CN104614443B CN104614443B CN201410826528.4A CN201410826528A CN104614443B CN 104614443 B CN104614443 B CN 104614443B CN 201410826528 A CN201410826528 A CN 201410826528A CN 104614443 B CN104614443 B CN 104614443B
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Abstract
The present invention provides a kind of rail vehicle wheel tread flat supersonic detection method and device based on boundary wave, wherein, the method includes：Obtain the straight incident and oblique incidence probe normal interface wave amplitude of standard wheel and record preservation, determine the boundary wave gate amplitude first threshold and Second Threshold of straight incident and oblique incidence probe respectively according to it；The boundary wave searched in the range of wheel position boundary wave gate to be measured, obtains the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate in the position；When boundary wave amplitude in the range of the straight incident probe boundary wave gate for obtaining is more than Second Threshold less than the boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of first threshold or acquisition, determine that the wheel position to be measured has flat sliding, and record the preservation boundary wave amplitude and the wheel position to be measured.The above method can be combined with the online ultrasonic automatic flaw detecting system in train wheel inside, without design in addition, can reduce complexity and cost, and accuracy is high.
Description
Technical field
Stepped on the present invention relates to ultrasonic non-destructive inspection techniques field, more particularly to a kind of rail vehicle wheel based on boundary wave
Face abrades supersonic detection method and device.
Background technology
In the prior art, rail vehicle wheel on-line checking contains the inspection such as inside wheel defect, wheel tread flat
Survey content.At present, inside wheel defects detection is typically with online automatic ultrasonic inspection system detectio；Wheel tread flat
Detection is typically with the detection of the methods such as optics, electromagnetic acoustic and displacement measurement, i.e., in inside wheel supersonic flaw detecting system
On the basis of resettle special flat sliding detecting system, but this can undoubtedly increase the complexity and cost of system, and by
In the otherness of detection method, it is difficult to set up the unified standard of rail vehicle wheel detection.
In consideration of it, how while being detected a flaw to inside wheel, wheel tread flat is carried out low complexity, low cost,
The detection that standard is unified and accuracy is high turns into the technical problem for being currently needed for solving.
The content of the invention
To solve above-mentioned technical problem, the present invention provides a kind of rail vehicle wheel tread flat based on boundary wave and surpasses
Sound detection method and device, can utilize accurate inspection of the change realization of supersonic boundary surface wave amplitude to train wheel flat
Survey, and the method can be combined with the online ultrasonic automatic flaw detecting system in train wheel inside, without design flat sliding in addition
Detecting system, can reduce complexity and cost, set up the unified standard of rail vehicle wheel detection.
In a first aspect, the present invention provides a kind of rail vehicle wheel tread flat supersonic detection method based on boundary wave,
Including：
Obtain the normal interface wave amplitude of the straight incident and oblique incidence probe of standard wheel, and by the standard wheel
The normal interface wave amplitude of straight incident and oblique incidence probe carries out record preservation；
The normal interface wave amplitude that straight incident and oblique incidence according to the standard wheel is popped one's head in, it is determined that straight incident probe circle
Face ripple gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold；
Treat the boundary wave in the range of the boundary wave gate for surveying wheel position to scan for, obtain the straight of wheel position to be measured
Boundary wave amplitude in the range of incident and oblique incidence probe boundary wave gate；
Boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured is less than institute
The boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of first threshold or acquired wheel position to be measured is stated to be more than
During the Second Threshold, determine that the wheel position to be measured has flat sliding, and the boundary wave amplitude is treated into measuring car with described
Wheel position carries out record preservation.
Alternatively, the first threshold is：A1-ε1,
Wherein, A1 is the normal interface wave amplitude of the straight incident probe of standard wheel, ε1It is the boundary wave of straight incident probe
Gate amplitude predesigned compensation value；And
The Second Threshold is：A2+ε2,
Wherein, the normal interface wave amplitude that A2 pops one's head in for the oblique incidence of standard wheel, ε2It is the boundary wave of oblique incidence probe
Gate amplitude predesigned compensation value.
Alternatively, the boundary wave treated in the range of the boundary wave gate for surveying wheel position is scanned for, and is obtained to be measured
Boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position, including：
The boundary wave treated in the range of the boundary wave gate for surveying wheel position using boundary wave gate searcher is scanned for,
Obtain the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured.
Alternatively, methods described also includes：
Boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured more than etc.
Boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of wheel position to be measured in the first threshold and acquired
During less than or equal to the Second Threshold, determine that the corresponding wheel position of boundary wave amplitude does not exist flat sliding.
Second aspect, the present invention provides a kind of rail vehicle wheel tread flat supersonic detection device based on boundary wave,
Including：
First acquisition module, the normal interface wave amplitude of the straight incident and oblique incidence probe for obtaining standard wheel, and
The normal interface wave amplitude of the straight incident and oblique incidence probe of the standard wheel is carried out into record preservation；
Threshold determination module, for the normal interface wave amplitude popped one's head according to the straight incident and oblique incidence of the standard wheel
Value, it is determined that straight incident probe boundary wave gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold；
Second acquisition module, scans for for treating the boundary wave in the range of the boundary wave gate for surveying wheel position, obtains
Take the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured；
Flat sliding determining module, for the straight incident probe boundary wave gate scope in acquired wheel position to be measured
Oblique incidence probe boundary wave gate model of the interior boundary wave amplitude less than the first threshold or acquired wheel position to be measured
When boundary wave amplitude in enclosing is more than the Second Threshold, determine that the wheel position to be measured has a flat sliding, and by the boundary
Face wave amplitude carries out record preservation with the wheel position to be measured.
Alternatively, the first threshold is：A1-ε1,
Wherein, A1 is the normal interface wave amplitude of the straight incident probe of standard wheel, ε1It is the boundary wave of straight incident probe
Gate amplitude predesigned compensation value；And
The Second Threshold is：A2+ε2,
Wherein, the normal interface wave amplitude that A2 pops one's head in for the oblique incidence of standard wheel, ε2It is the boundary wave of oblique incidence probe
Gate amplitude predesigned compensation value.
Alternatively, second acquisition module, specifically for
The boundary wave treated in the range of the boundary wave gate for surveying wheel position using boundary wave gate searcher is searched
Rope, obtains the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured.
Alternatively, described device also includes：
Without flat sliding determining module, for the straight incident probe boundary wave gate model in acquired wheel position to be measured
Boundary wave amplitude in enclosing more than or equal to the first threshold, and acquired wheel position to be measured oblique incidence probe boundary wave
When boundary wave amplitude in the range of gate is less than or equal to the Second Threshold, the corresponding wheel position of boundary wave amplitude is determined not
There is flat sliding.
As shown from the above technical solution, the rail vehicle wheel tread flat ultrasound detection side based on boundary wave of the invention
Method and device, by obtaining the straight incident and oblique incidence probe normal interface wave amplitude of standard wheel and recording preservation, according to its point
Not Que Ding directly incident and oblique incidence probe boundary wave gate amplitude first threshold and Second Threshold；Search for wheel position circle to be measured
Boundary wave in the range of the ripple gate of face, obtains the amplitude of the interfacial wave in the range of the straight incident and oblique incidence probe boundary wave gate in the position
Value；Boundary wave amplitude in the range of the straight incident probe boundary wave gate for obtaining is visited less than the oblique incidence of first threshold or acquisition
When boundary wave amplitude in the range of head boundary wave gate is more than Second Threshold, determine that the wheel position to be measured has flat sliding,
And the preservation boundary wave amplitude and the wheel position to be measured are recorded, thereby, it is possible to be realized using the change of supersonic boundary surface wave amplitude
Accurate detection to train wheel flat, and the method can be with the online ultrasonic automatic flaw detecting system phase in train wheel inside
With reference to, without design flat sliding detecting system in addition, complexity and cost can be reduced, set up the detection of rail vehicle wheel
Unified standard.
Brief description of the drawings
The rail vehicle wheel tread flat supersonic detection method based on boundary wave that Fig. 1 is provided for one embodiment of the invention
Schematic flow sheet；
The schematic diagram that embodiment of the present invention methods described is realized using straight incident probe that Fig. 2 is provided for the present invention；
The schematic diagram that embodiment of the present invention methods described is realized using oblique incidence probe that Fig. 3 is provided for the present invention；
The rail vehicle wheel tread flat supersonic detection device based on boundary wave that Fig. 4 is provided for one embodiment of the invention
Structural representation.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
Only it is a part of embodiment of the invention, rather than whole embodiments.Based on embodiments of the invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 shows the rail vehicle wheel tread flat ultrasound detection based on boundary wave that one embodiment of the invention is provided
The schematic flow sheet of method, as shown in figure 1, the rail vehicle wheel tread flat ultrasound detection based on boundary wave of the present embodiment
Method is as described below.
101st, the normal interface wave amplitude of the straight incident and oblique incidence probe of standard wheel is obtained, and by the standard wheel
The normal interface wave amplitude of straight incident and oblique incidence probe carry out record preservation.
102nd, the normal interface wave amplitude that the straight incident and oblique incidence according to the standard wheel is popped one's head in, it is determined that straight incident spy
Head boundary wave gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold.
In a particular application, the first threshold is：A1-ε1,
Wherein, A1 is the normal interface wave amplitude of the straight incident probe of standard wheel, ε1It is the boundary wave of straight incident probe
Gate amplitude predesigned compensation value；And
The Second Threshold is：A2+ε2,
Wherein, the normal interface wave amplitude that A2 pops one's head in for the oblique incidence of standard wheel, ε2It is the boundary wave of oblique incidence probe
Gate amplitude predesigned compensation value.
It will be appreciated that the ε of the present embodiment1And ε2Can be pre-set according to practical experience and actual conditions.
103rd, treat the boundary wave in the range of the boundary wave gate for surveying wheel position to scan for, obtain wheel position to be measured
Straight incident and oblique incidence probe boundary wave gate in the range of boundary wave amplitude.
In a particular application, this step 103 can utilize boundary wave gate searcher to treat the boundary wave lock for surveying wheel position
Boundary wave in the range of door is scanned for, and is obtained in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured
Boundary wave amplitude.
104th, the boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured is small
Boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of the first threshold or acquired wheel position to be measured
During more than the Second Threshold, determine that the wheel position to be measured has flat sliding, and the boundary wave amplitude is treated with described
Surveying wheel position carries out record preservation.
In a particular application, the step of the present embodiment methods described also includes not shown in figure：
Boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured more than etc.
Boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of wheel position to be measured in the first threshold and acquired
During less than or equal to the Second Threshold, determine that the corresponding wheel position of boundary wave amplitude does not exist flat sliding.
The principle of the present embodiment methods described is：Change using ultrasonic probe boundary wave amplitude is entered to wheel tread flat
Row judges.Fig. 2 shows the schematic diagram that embodiment of the present invention methods described is realized using straight incident probe of present invention offer,
As shown in Fig. 2 when probe vertical incides wheel tread, if tread has scratch, ultrasonic wave will be produced in abrasion
Raw scattering, boundary wave amplitude will be reduced, and the reduction of boundary wave amplitude is caught come to wheel tread flat by boundary wave gate
Recorded；Fig. 3 shows the signal that embodiment of the present invention methods described is realized using oblique incidence probe of present invention offer
Figure, as shown in figure 3, when pop one's head in it is oblique be mapped to wheel tread when, if tread has scratch, ultrasonic wave will produce in abrasion
Raw scattering, boundary wave amplitude will be improved, and the increase of boundary wave amplitude is caught come to wheel tread flat by boundary wave gate
Recorded.
The rail vehicle wheel tread flat supersonic detection method based on boundary wave of the present embodiment, by obtaining standard
The straight incident and oblique incidence probe normal interface wave amplitude of wheel simultaneously records preservation, determines that straight incident and oblique incidence is visited respectively according to it
The boundary wave gate amplitude first threshold and Second Threshold of head；The interface searched in the range of wheel position boundary wave gate to be measured
Ripple, obtains the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate in the position；In the straight incident spy for obtaining
Boundary wave amplitude in the range of head boundary wave gate is less than in the range of the oblique incidence probe boundary wave gate of first threshold or acquisition
Boundary wave amplitude when being more than Second Threshold, determine that the wheel position to be measured has a flat sliding, and record the preservation boundary wave
Amplitude and the wheel position to be measured, thereby, it is possible to be realized to train wheel flat using the change of supersonic boundary surface wave amplitude
Accurate detection, and be currently known train wheel flat detection be typically with optics, electromagnetic acoustic and displacement
The methods such as measurement, are individually present with the flaw detection of train wheel inside, and the present embodiment methods described can be relied on inside train wheel
Online ultrasonic automatic flaw detecting system, without increasing extra design in addition, can reduce complexity and cost, set up rail vehicle
The unified standard of wheel detection.
Fig. 4 shows the rail vehicle wheel tread flat ultrasound detection based on boundary wave that one embodiment of the invention is provided
The structural representation of device, as shown in figure 4, the rail vehicle wheel tread flat ultrasound detection based on boundary wave of the present embodiment
Device, including：First acquisition module 41, threshold determination module 42, the second acquisition module 43 and flat sliding determining module 44；
First acquisition module 41, the normal interface wave amplitude of the straight incident and oblique incidence probe for obtaining standard wheel,
And the normal interface wave amplitude of the straight incident and oblique incidence probe of the standard wheel is carried out into record preservation；
Threshold determination module 42, for the normal interface wave amplitude popped one's head according to the straight incident and oblique incidence of the standard wheel
Value, it is determined that straight incident probe boundary wave gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold；
Second acquisition module 43, scans for for treating the boundary wave in the range of the boundary wave gate for surveying wheel position,
Obtain the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured；
Flat sliding determining module 44, for the straight incident probe boundary wave gate in acquired wheel position to be measured
In the range of oblique incidence probe boundary wave lock of the boundary wave amplitude less than the first threshold or acquired wheel position to be measured
When boundary wave amplitude in the range of door is more than the Second Threshold, determine that the wheel position to be measured has flat sliding, and will
The boundary wave amplitude carries out record preservation with the wheel position to be measured.
In a particular application, the first threshold is：A1-ε1,
Wherein, A1 is the normal interface wave amplitude of the straight incident probe of standard wheel, ε1It is the boundary wave of straight incident probe
Gate amplitude predesigned compensation value；And
The Second Threshold is：A2+ε2,
Wherein, the normal interface wave amplitude that A2 pops one's head in for the oblique incidence of standard wheel, ε2It is the boundary wave of oblique incidence probe
Gate amplitude predesigned compensation value.
It will be appreciated that the ε of the present embodiment1And ε2Can be pre-set according to practical experience and actual conditions.
In a particular application, second acquisition module 43, can be specifically for
The boundary wave treated in the range of the boundary wave gate for surveying wheel position using boundary wave gate searcher is scanned for,
Obtain the boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured.
In a particular application, the present embodiment described device can also include determining mould without flat sliding not shown in figure
Block：
Without flat sliding determining module, for the straight incident probe boundary wave gate model in acquired wheel position to be measured
Boundary wave amplitude in enclosing more than or equal to the first threshold, and acquired wheel position to be measured oblique incidence probe boundary wave
When boundary wave amplitude in the range of gate is less than or equal to the Second Threshold, the corresponding wheel position of boundary wave amplitude is determined not
There is flat sliding.
The rail vehicle wheel tread flat supersonic detection device based on boundary wave of the present embodiment, can be using ultrasonic boundary
The accurate detection to train wheel flat is realized in the change of face wave amplitude, and the method can be online with train wheel inside
Ultrasonic automatic flaw detecting system is combined, and without design flat sliding detecting system in addition, can reduce complexity and cost, builds
The unified standard of vertical rail vehicle wheel detection.
The rail vehicle wheel tread flat supersonic detection device based on boundary wave of the present embodiment, before can be used for performing
The technical scheme of embodiment of the method shown in Fig. 1 is stated, its realization principle is similar with technique effect, and here is omitted.
" first ", " second " etc. are not that regulation is made to sequencing in the present embodiment, and simply title is made
Difference, in the present embodiment, any restriction is not made.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
1. a kind of rail vehicle wheel tread flat supersonic detection method based on boundary wave, it is characterised in that including：
Obtain the normal interface wave amplitude of the straight incident and oblique incidence probe of standard wheel, and by the straight incidence of the standard wheel
The normal interface wave amplitude popped one's head in oblique incidence carries out record preservation；
The normal interface wave amplitude that straight incident and oblique incidence according to the standard wheel is popped one's head in, it is determined that straight incident probe boundary wave
Gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold；
Treat the boundary wave in the range of the boundary wave gate for surveying wheel position to scan for, obtain the straight incidence of wheel position to be measured
With the boundary wave amplitude in the range of oblique incidence probe boundary wave gate；
Boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured is less than described the
Boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of one threshold value or acquired wheel position to be measured is more than described
During Second Threshold, determine that the wheel position to be measured has a flat sliding, and by the boundary wave amplitude and the wheel position to be measured
Putting carries out record preservation；
Wherein, the first threshold is：A1-ε1, the Second Threshold is：A2+ε2, A1 is the straight incident probe of standard wheel
Normal interface wave amplitude, ε1It is the boundary wave gate amplitude predesigned compensation value of straight incident probe；A2 is the oblique incidence of standard wheel
The normal interface wave amplitude of probe, ε2It is the boundary wave gate amplitude predesigned compensation value of oblique incidence probe.
2. method according to claim 1, it is characterised in that described to treat in the range of the boundary wave gate for surveying wheel position
Boundary wave scan for, obtain the boundary wave in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured
Amplitude, including：
The boundary wave treated in the range of the boundary wave gate for surveying wheel position using boundary wave gate searcher is scanned for, and is obtained
Boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured.
3. method according to claim 1, it is characterised in that also include：
Boundary wave amplitude in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured is more than or equal to institute
State first threshold, and boundary wave amplitude in the range of the oblique incidence probe boundary wave gate of acquired wheel position to be measured is less than
During equal to the Second Threshold, determine that the corresponding wheel position of boundary wave amplitude does not exist flat sliding.
4. a kind of rail vehicle wheel tread flat supersonic detection device based on boundary wave, it is characterised in that including：
First acquisition module, the normal interface wave amplitude of the straight incident and oblique incidence probe for obtaining standard wheel, and by institute
The normal interface wave amplitude for stating the straight incident and oblique incidence probe of standard wheel carries out record preservation；
Threshold determination module, for the normal interface wave amplitude popped one's head according to the straight incident and oblique incidence of the standard wheel, really
Fixed straight incident probe boundary wave gate amplitude first threshold and oblique incidence probe boundary wave gate amplitude Second Threshold；
Second acquisition module, is scanned for for treating the boundary wave in the range of the boundary wave gate for surveying wheel position, and acquisition is treated
The boundary wave amplitude surveyed in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position；
Flat sliding determining module, in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured
Boundary wave amplitude is popped one's head in the range of boundary wave gate less than the oblique incidence of the first threshold or acquired wheel position to be measured
Boundary wave amplitude when being more than the Second Threshold, determine that the wheel position to be measured has a flat sliding, and by the boundary wave
Amplitude carries out record preservation with the wheel position to be measured；
Wherein, the first threshold is：A1-ε1, the Second Threshold is：A2+ε2, A1 is the straight incident probe of standard wheel
Normal interface wave amplitude, ε1It is the boundary wave gate amplitude predesigned compensation value of straight incident probe；A2 is the oblique incidence of standard wheel
The normal interface wave amplitude of probe, ε2It is the boundary wave gate amplitude predesigned compensation value of oblique incidence probe.
5. device according to claim 4, it is characterised in that second acquisition module, specifically for
The boundary wave treated in the range of the boundary wave gate for surveying wheel position using boundary wave gate searcher is scanned for, and is obtained
Boundary wave amplitude in the range of the straight incident and oblique incidence probe boundary wave gate of wheel position to be measured.
6. device according to claim 4, it is characterised in that also include：
Without flat sliding determining module, in the range of the straight incident probe boundary wave gate of acquired wheel position to be measured
Boundary wave amplitude be more than or equal to the first threshold, and acquired wheel position to be measured oblique incidence probe boundary wave gate
In the range of boundary wave amplitude be less than or equal to the Second Threshold when, determine that the corresponding wheel position of boundary wave amplitude does not exist
Flat sliding.
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| CN201410826528.4A CN104614443B (en) | 2014-12-25 | 2014-12-25 | Rail vehicle wheel tread flat supersonic detection method and device based on boundary wave |
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| CN201410826528.4A CN104614443B (en) | 2014-12-25 | 2014-12-25 | Rail vehicle wheel tread flat supersonic detection method and device based on boundary wave |
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| DE29723624U1 (en) * | 1997-10-29 | 1999-03-04 | Theysohn Friedrich Fa | Device for fault detection in continuous strips, profiles or pipes made of plastic with ultrasonic signals |
| CN200962102Y (en) * | 2006-09-22 | 2007-10-17 | 西南交通大学 | Injury detector for motorcycle wheel to ground of portable electromagnetic ultrasonic surface wave |
| CN100561214C (en) * | 2006-09-22 | 2009-11-18 | 西南交通大学 | Portable rolling stock wheel tread electromagnetic supersonic flaw detecting instrument |
| CN101650171B (en) * | 2009-09-10 | 2011-11-16 | 奥瑞视（北京）科技有限公司 | Real-time monitoring method and real-time monitoring system for thickness of probe coupling layer with automatic flaw detection by steel-plate ultrasound |
| CN101706477B (en) * | 2009-11-12 | 2012-05-23 | 哈尔滨工业大学 | Detector and method based on electromagnetic ultrasonic oblique incidence body wave |
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