CN109975391B - Eddy current flexible array probe suitable for special structure weld joint inspection - Google Patents
Eddy current flexible array probe suitable for special structure weld joint inspection Download PDFInfo
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- CN109975391B CN109975391B CN201711439990.9A CN201711439990A CN109975391B CN 109975391 B CN109975391 B CN 109975391B CN 201711439990 A CN201711439990 A CN 201711439990A CN 109975391 B CN109975391 B CN 109975391B
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- 239000000523 sample Substances 0.000 title claims abstract description 98
- 238000007689 inspection Methods 0.000 title claims abstract description 26
- 230000005284 excitation Effects 0.000 claims abstract description 88
- 238000001514 detection method Methods 0.000 claims abstract description 83
- 230000007547 defect Effects 0.000 claims abstract description 20
- 239000003292 glue Substances 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 36
- 239000000758 substrate Substances 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 15
- 238000003475 lamination Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000012811 non-conductive material Substances 0.000 claims description 6
- 238000004148 unit process Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention belongs to the technical field of eddy current flexible array probes, and particularly relates to an eddy current flexible array probe suitable for special structure weld inspection; the probe comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module; the probe supporting and attaching structure comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module, wherein the probe supporting and attaching structure is bonded by a bonding layer formed by non-conductive non-magnetic bonding glue; the magnetic field excitation module and the magnetic field detection module are coupled through a magnetic field, the magnetic field excitation module excites a vortex field on the surface of the detected sample, a distorted magnetic field signal is generated after the vortex field is disturbed by the surface defect of the detected sample, and the magnetic field detection module picks up the distorted magnetic field signal to realize the detection of the defect of the detected sample.
Description
Technical Field
The invention belongs to the technical field of eddy current flexible array probes, and particularly relates to an eddy current flexible array probe suitable for special structure weld inspection.
Background
Many complicated weld structures exist in a loop of the nuclear power system, such as a pressure vessel top cover penetrating piece connecting weld (J-shaped weld), a reactor control rod driving mechanism sealing weld (omega weld), a pressure vessel bottom penetrating piece connecting weld (J-shaped weld) and the like, and because the weld is a pressure-bearing boundary, the possibility of generating defects in the actual operation process is extremely high, and in order to effectively monitor the defects, methods such as ultrasonic, conventional vortex and the like are used at present, but due to the complexity of the structure, the detection requirements are difficult to meet.
The omega welding seam is a connecting sealing welding seam between a reactor control rod driving mechanism and a reactor top cover cup seat, is a special sealing welding seam of a loop pressure boundary, is in a vibration environment for a long time, is internally subjected to the action of a loop medium (boric acid water) with high temperature and high pressure and corrosiveness, and particularly causes the expansion of welding defects existing in the welding seam due to the change of temperature during shutdown and opening of the reactor, and is a weak link of a nuclear primary component. The inner ring of the parent metal of the omega welding seam is 0Cr18Ni12Mo2Ti, the filling material is 0Cr18Ni9Ti, the parent metal and the heat affected zone structure of the welding seam are ferrite and austenite, the grain size is 6-7 grades, the weld seam structure is delta ferrite and austenite, and the welding seam area, the heat affected zone and the wood area all have certain weak magnetism.
The omega welding seam is a semicircular annular welding seam with small radius, large curvature and thin wall thickness, and the inner and outer surfaces of the welding seam are formed poorly (the height of the remaining welding seam is uneven). The thickness of the omega-shaped weld joint parent metal is 3mm, but the thickness of the weld joint area is about 5mm due to the existence of surplus height on the inner surface and the outer surface of the weld joint, the surplus height on the outer surface of the weld joint is about 0.5mm, and the width of the weld joint is about 6-7 mm, and the specific structure is shown in figure 1. In this case, the surface of the outer surface, which can be well contacted by the transducer, is small, which causes problems of large surface lift-off effect, insufficient penetration depth and the like in eddy current inspection.
For eddy current detection of welding seams with special structures, the design of a transducer is quite important, many researches are carried out at the present stage, including structures of arranging a plurality of point-type, orthogonal, differential and other coils on the joint cambered surface of a profiling structure, but most of the structures adopt a signal excitation and receiving mode based on spontaneous self-reception, and the mode has the characteristics of simple design, simplicity of coil arrangement and the like, but the noise floor of a welding seam area, the weak magnetism of the welding seam area and a parent metal area cause great influence on signal resolution and detection, and sometimes even difficult detection.
Disclosure of Invention
The invention aims to provide an eddy current flexible array probe suitable for special structure weld inspection, which solves the problems of a receiving and transmitting mode of magnetic field excitation and signal pickup separation of an omega weld, good lamination and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
The eddy current flexible array probe suitable for special structure weld inspection comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module;
The probe supporting and attaching structure comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module, wherein the probe supporting and attaching structure is bonded by a bonding layer formed by non-conductive non-magnetic bonding glue;
The magnetic field excitation module and the magnetic field detection module are coupled through a magnetic field, the magnetic field excitation module excites a vortex field on the surface of the detected sample, a distorted magnetic field signal is generated after the vortex field is disturbed by the surface defect of the detected sample, and the magnetic field detection module picks up the distorted magnetic field signal to realize the detection of the defect of the detected sample.
The probe also comprises an excitation power supply module and a signal processing unit; the excitation power supply module is respectively and electrically connected with the magnetic field excitation module and provides current for the magnetic field excitation module; the signal processing unit is electrically connected with the magnetic field detection module, and the signal processing unit processes the distorted magnetic field signal picked up by the magnetic field detection module to realize the detection of the defect of the detected sample.
The probe supporting and attaching structure comprises a first sliding block, a second sliding block, a third sliding block, a first supporting piece, a second supporting piece, a third supporting rod, a guide groove and a telescopic control unit;
the probe supporting and attaching structure is made of elastic non-magnetic non-conductive material;
The probe support and lamination structure comprises a probe support and lamination structure, a probe support, a probe lamination structure and a probe lamination structure, wherein a horizontal guide groove is formed in the central back area of the probe support and lamination structure, a first sliding block, a second sliding block and a third sliding block are embedded in the guide groove, the first sliding block, the second sliding block and the third sliding block can slide back and forth along the guide groove, and flanges are arranged along the guide groove; the first sliding block, the second sliding block and the third sliding block are respectively connected with the telescopic control unit through a first supporting piece, a second supporting piece and a third supporting rod;
the telescopic control unit controls the first sliding block, the second sliding block and the third sliding block to move in the guide groove;
The first supporting piece, the second supporting piece and the third supporting rod are made of non-magnetic conductive non-conductive materials.
The magnetic field excitation module comprises an excitation flexible substrate, wherein a plurality of densely arranged rectangular circuit lines are printed on the excitation flexible substrate along the length direction, the rectangular circuit lines are vertically printed along the width, and the plurality of rectangular circuit lines are sequentially connected in series and then are electrically connected with the excitation power supply module; and the area outside the rectangular circuit line on the excitation flexible substrate is a magnetic field excitation shielding area, and copper is covered on the magnetic field excitation shielding area to form magnetic field shielding.
The magnetic field detection module comprises a detection flexible substrate, wherein a plurality of spiral coils are printed on the detection flexible substrate, a row of spiral coils are formed by the plurality of spiral coils along the width direction of the detection flexible substrate, a plurality of rows of spiral coils are printed along the length direction of the detection flexible substrate, and two adjacent rows of spiral coils are staggered; each spiral coil is electrically connected with the signal processing unit; and the area outside the spiral coil on the detection flexible substrate is a detection shielding area, and copper is covered on the detection shielding area to form a magnetic field shielding.
The rectangular circuit lines of the magnetic field excitation module correspond to the spiral coils of the magnetic field detection module, each rectangular circuit line surrounds a row of spiral coils, and each rectangular circuit line and the corresponding row of spiral coils form an excitation detection coil group;
After the excitation power supply module excites the magnetic field excitation module, a relatively uniform magnetic field is formed in a rectangular area of each rectangular circuit line of the magnetic field excitation module 2;
The magnetic field excitation module excites a plurality of separation vortex fields on the surface of the detected sample, the vortex fields are disturbed by the surface defects of the detected sample to generate distorted magnetic field signals, the spiral coils at the positions corresponding to the magnetic field detection module pick up the distorted magnetic field signals, and the signal processing unit processes the distorted magnetic field signals picked up by the spiral coils to acquire the surface defect information of the detected sample.
For an upper omega welding line, a middle omega welding line and a lower omega welding line, the surface of the magnetic field detection module 3 is in contact with the surface of the omega welding line, the telescopic control unit adjusts and adjusts the positions of the first sliding block, the second sliding block and the third sliding block in the guide groove, the surface of the probe is attached to the surface of the omega welding line, then the excitation power supply module supplies alternating current to the magnetic field excitation module, a relatively uniform magnetic field is formed in a rectangular area of a rectangular circuit line, and because each excitation detection coil group has the same strength, when the circumferential inspection is carried out along the omega welding line, longitudinal cracks of the omega welding line are carried out in a mode of simultaneously exciting and receiving each row of spiral coils perpendicular to the welding line, and transverse cracks of the omega welding line are carried out in a mode of sequentially alternately exciting and receiving two rows of spiral coils at intervals.
The invention has the technical effects that:
The invention discloses an eddy current flexible array probe suitable for special structure welding line inspection, which realizes real-time inspection of transverse and longitudinal cracks by adopting an excitation and receiving module separation mode made of a flexible printed board, wherein the excitation module of a printed circuit adopts a printed line to realize local magnetic field homogenization of a detection area, so that the influence of magnetic field distortion of the local area on signals is reduced, meanwhile, the rapid pickup and analysis of the signals are realized by adopting a multiplexing technology, the three support legs of the probe can automatically stretch and retract and limit, good bonding of welding lines of different structures can be realized, the irradiation dose of detection personnel caused by the use quantity and replacement of the probe in the actual detection process is reduced, and the detection efficiency is improved.
The probe can be used for detecting the curved surface weld with a complex structure similar to the omega weld except for being applied to detecting the omega weld.
Drawings
FIG. 1 is a schematic illustration of an omega weld;
FIG. 2 is a schematic view of an eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention;
FIG. 3 is a top view of a probe attachment structure of an eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention;
FIG. 4 is a front view of a probe attachment structure of an eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention;
FIG. 5 is a schematic diagram of a magnetic field excitation module of an eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention;
FIG. 6 is a schematic diagram of a magnetic field detection module of an eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention;
FIG. 7 is a schematic diagram showing the relative positions of a magnetic field excitation module and a magnetic field detection module of an eddy current flexible array probe suitable for special structure weld inspection;
FIG. 8 is a schematic diagram of the detection of an upper omega weld using the present invention;
FIG. 9 is a schematic illustration of the detection of a center omega weld using the present invention;
FIG. 10 is a schematic illustration of the detection of a lower omega weld using the present invention;
In the figure: 1-probe support and laminating structure, 2-magnetic field excitation module, 3-magnetic field detection module, 101-first slider, 102-second slider, 103-third slider, 104-first support, 105-second support, 106-third bracing piece, 107-guide slot, 201-rectangular circuit line, 202-magnetic field excitation shielding region, 301-spiral coil, 302-detection shielding region.
Detailed Description
An eddy current flexible array probe suitable for special structure weld inspection in accordance with the present invention is described in detail below with reference to the detailed description and accompanying drawings.
As shown in fig. 2 to 10, the invention relates to an eddy current flexible array probe suitable for welding line inspection with a special structure, which comprises a probe supporting and attaching structure 1, a magnetic field excitation module 2 and a magnetic field detection module 3;
The probe supporting and attaching structure 1, the magnetic field excitation module 2 and the magnetic field detection module 3 are sequentially stacked, and the probe supporting and attaching structure 1, the magnetic field excitation module 2 and the magnetic field detection module 3 are bonded through a bonding layer formed by non-conductive non-magnetic bonding glue;
the magnetic field excitation module 2 and the magnetic field detection module 3 are coupled through a magnetic field, the magnetic field excitation module 2 excites a vortex field on the surface of the detected sample, a distorted magnetic field signal is generated after the vortex field is disturbed by the surface defect of the detected sample, and the magnetic field detection module 3 picks up the distorted magnetic field signal to realize the detection of the defect of the detected sample.
The probe also comprises an excitation power supply module and a signal processing unit; the excitation power supply module is respectively and electrically connected with the magnetic field excitation module 2 and provides current for the magnetic field excitation module 2; the signal processing unit is electrically connected with the magnetic field detection module 3, and the signal processing unit processes the distorted magnetic field signal picked up by the magnetic field detection module 3 so as to realize the detection of the defect of the detected sample.
As shown in fig. 3 and 4, the probe supporting and attaching structure 1 includes a first slider 101, a second slider 102, a third slider 103, a first supporting member 104, a second supporting member 105, a third supporting rod 106, a guide groove 107 and a telescopic control unit;
the probe supporting and attaching structure 1 is made of elastic non-magnetic conductive non-conductive material;
The probe supporting and attaching structure 1 is provided with a horizontal guide groove 107 in the back center area, a first sliding block 101, a second sliding block 102 and a third sliding block 103 are embedded in the guide groove 107, the first sliding block 101, the second sliding block 102 and the third sliding block 103 can slide back and forth along the guide groove 107, and flanges are arranged along the guide groove 107 to prevent the first sliding block 101, the second sliding block 102 and the third sliding block 103 from falling when the guide groove 107 slides back and forth; the first sliding block 101, the second sliding block 102 and the third sliding block 103 are respectively connected with the telescopic control unit through a first supporting piece 104, a second supporting piece 105 and a third supporting rod 106;
the telescopic control unit controls the first sliding block 101, the second sliding block 102 and the third sliding block 103 to move in the guide groove 107, so that the probe is attached to the test piece detection surface;
the first supporting piece 104, the second supporting piece 105 and the third supporting piece 106 are made of non-magnetic conductive non-conductive materials;
As shown in fig. 5, the magnetic field excitation module 2 includes an excitation flexible substrate, where a plurality of densely arranged rectangular circuit lines 201 are printed along a length direction of the excitation flexible substrate, the rectangular circuit lines 201 are vertically printed along a width direction, and the plurality of rectangular circuit lines 201 are electrically connected with an excitation power supply module after being sequentially connected in series; the area except the rectangular circuit line 201 on the excitation flexible substrate is a magnetic field excitation shielding area 202, and copper is covered on the magnetic field excitation shielding area 202 to form magnetic field shielding;
As shown in fig. 6, the magnetic field detection module 3 includes a detection flexible substrate, on which a plurality of spiral coils 301 are printed, wherein the plurality of spiral coils 301 form a row of spiral coils 301 along the width direction of the detection flexible substrate, and a plurality of rows of spiral coils 301 are printed along the length direction of the detection flexible substrate, and two adjacent rows of spiral coils 301 are staggered; each spiral coil 301 is electrically connected to a signal processing unit; the area, except the spiral coil 301, on the detection flexible substrate is a detection shielding area 302, and copper is covered on the detection shielding area 302 to form a magnetic field shielding;
As shown in fig. 7, the rectangular circuit lines 201 of the magnetic field excitation module 2 correspond to the spiral coils 301 of the magnetic field detection module 3, each rectangular circuit line 201 surrounds a row of spiral coils 301, and each rectangular circuit line 201 and the corresponding row of spiral coils 301 form an excitation detection coil group;
After the excitation power supply module excites the magnetic field excitation module 2, a relatively uniform magnetic field is formed in a rectangular area of each rectangular circuit line 201 of the magnetic field excitation module 2, so that magnetic field signal distortion of areas in various narrower ranges is suppressed during bending and fitting of the invention;
The magnetic field excitation module 2 excites a plurality of separation vortex fields on the surface of the detected sample, the vortex fields are disturbed by the surface defects of the detected sample to generate distorted magnetic field signals, the spiral coil 301 at the corresponding position of the magnetic field detection module 3 picks up the distorted magnetic field signals, and the signal processing unit processes the distorted magnetic field signals picked up by the spiral coil 301 to acquire the surface defect information of the detected sample.
As shown in fig. 8 to 10, for the upper omega-shaped weld, the middle omega-shaped weld and the lower omega-shaped weld, the probe surface of the invention is contacted with the surface of the omega-shaped weld, the telescopic control unit adjusts and adjusts the positions of the first sliding block 101, the second sliding block 102 and the third sliding block 103 in the guide groove 107, the probe surface is attached to the surface of the omega-shaped weld, then the excitation power supply module supplies alternating current to the magnetic field excitation module 2, a relatively uniform magnetic field is formed in the rectangular area of the rectangular circuit line 201, and the strength of the magnetic field generated in the excitation power supply module is the same because each excitation detection coil group, when the probe of the invention performs circumferential inspection along the omega-shaped weld, the longitudinal crack of the omega-shaped weld is performed in a mode of simultaneously exciting and receiving every row of spiral coils 301 perpendicular to the weld, and the transverse crack of the omega-shaped weld is performed in a mode of alternately exciting and receiving two rows of spiral coils 301 in turn.
Claims (6)
1. An eddy current flexible array probe suitable for special structure weld inspection, which is characterized in that: the probe comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module; the probe supporting and attaching structure comprises a probe supporting and attaching structure, a magnetic field excitation module and a magnetic field detection module, wherein the probe supporting and attaching structure is bonded by a bonding layer formed by non-conductive non-magnetic bonding glue; the magnetic field excitation module and the magnetic field detection module are coupled through a magnetic field, the magnetic field excitation module excites a vortex field on the surface of the detected sample, a distorted magnetic field signal is generated after the vortex field is disturbed by the surface defect of the detected sample, and the magnetic field detection module picks up the distorted magnetic field signal to realize the detection of the defect of the detected sample; the probe supporting and attaching structure comprises a first sliding block, a second sliding block, a third sliding block, a first supporting piece, a second supporting piece, a third supporting rod, a guide groove and a telescopic control unit; the probe supporting and attaching structure is made of elastic non-magnetic non-conductive material; the probe support and lamination structure comprises a probe support and lamination structure, a probe support, a probe lamination structure and a probe lamination structure, wherein a horizontal guide groove is formed in the central back area of the probe support and lamination structure, a first sliding block, a second sliding block and a third sliding block are embedded in the guide groove, the first sliding block, the second sliding block and the third sliding block can slide back and forth along the guide groove, and flanges are arranged along the guide groove; the first sliding block, the second sliding block and the third sliding block are respectively connected with the telescopic control unit through a first supporting piece, a second supporting piece and a third supporting rod; the telescopic control unit controls the first sliding block, the second sliding block and the third sliding block to move in the guide groove; the first supporting piece, the second supporting piece and the third supporting rod are made of non-magnetic conductive non-conductive materials.
2. An eddy current flexible array probe for special structure weld inspection as claimed in claim 1, wherein: the probe also comprises an excitation power supply module and a signal processing unit; the excitation power supply module is respectively and electrically connected with the magnetic field excitation module and provides current for the magnetic field excitation module; the signal processing unit is electrically connected with the magnetic field detection module, and the signal processing unit processes the distorted magnetic field signal picked up by the magnetic field detection module to realize the detection of the defect of the detected sample.
3. An eddy current flexible array probe for special structure weld inspection as claimed in claim 1, wherein: the magnetic field excitation module comprises an excitation flexible substrate, wherein a plurality of densely arranged rectangular circuit lines are printed on the excitation flexible substrate along the length direction, the rectangular circuit lines are vertically printed along the width, and the plurality of rectangular circuit lines are sequentially connected in series and then are electrically connected with the excitation power supply module; and the area outside the rectangular circuit line on the excitation flexible substrate is a magnetic field excitation shielding area, and copper is covered on the magnetic field excitation shielding area to form magnetic field shielding.
4. A flexible array probe for eddy current inspection of welds of special construction according to claim 3, characterized in that: the magnetic field detection module comprises a detection flexible substrate, wherein a plurality of spiral coils are printed on the detection flexible substrate, a row of spiral coils are formed by the plurality of spiral coils along the width direction of the detection flexible substrate, a plurality of rows of spiral coils are printed along the length direction of the detection flexible substrate, and two adjacent rows of spiral coils are staggered; each spiral coil is electrically connected with the signal processing unit; and the area outside the spiral coil on the detection flexible substrate is a detection shielding area, and copper is covered on the detection shielding area to form a magnetic field shielding.
5. An eddy current flexible array probe for special structure weld inspection as claimed in claim 4, wherein: the rectangular circuit lines of the magnetic field excitation module correspond to the spiral coils of the magnetic field detection module, each rectangular circuit line surrounds a row of spiral coils, and each rectangular circuit line and the corresponding row of spiral coils form an excitation detection coil group; after the excitation power supply module excites the magnetic field excitation module, a relatively uniform magnetic field is formed in a rectangular area of each rectangular circuit line of the magnetic field excitation module; the magnetic field excitation module excites a plurality of separation vortex fields on the surface of the detected sample, the vortex fields are disturbed by the surface defects of the detected sample to generate distorted magnetic field signals, the spiral coils at the positions corresponding to the magnetic field detection module pick up the distorted magnetic field signals, and the signal processing unit processes the distorted magnetic field signals picked up by the spiral coils to acquire the surface defect information of the detected sample.
6. An eddy current flexible array probe for special structure weld inspection as claimed in claim 5, wherein: for an upper omega welding line, a middle omega welding line and a lower omega welding line, the surfaces of the magnetic field detection modules are in contact with the surfaces of the omega welding lines, the telescopic control unit adjusts the positions of the first sliding block, the second sliding block and the third sliding block in the guide groove, the surfaces of the probes are attached to the surfaces of the omega welding lines, then the excitation power supply module supplies alternating current to the magnetic field excitation modules, a relatively uniform magnetic field is formed in a rectangular area of a rectangular circuit line, and because each excitation detection coil group has the same magnetic field intensity, when the circumferential inspection is carried out along the omega welding line, longitudinal cracks of the omega welding line are carried out in a mode of simultaneous excitation and reception of each row of spiral coils perpendicular to the welding line, and transverse cracks of the omega welding line are carried out in a mode of sequential alternate excitation and reception of two rows of spiral coils.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711439990.9A CN109975391B (en) | 2017-12-27 | 2017-12-27 | Eddy current flexible array probe suitable for special structure weld joint inspection |
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| CN201711439990.9A CN109975391B (en) | 2017-12-27 | 2017-12-27 | Eddy current flexible array probe suitable for special structure weld joint inspection |
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| CN109975391A CN109975391A (en) | 2019-07-05 |
| CN109975391B true CN109975391B (en) | 2024-05-14 |
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| CN111257410A (en) * | 2020-03-23 | 2020-06-09 | 四川德源石油天然气工程有限公司 | Multilayer PCB differential eddy current testing sensor |
| CN113567544A (en) * | 2020-04-29 | 2021-10-29 | 核动力运行研究所 | Eddy current array probe suitable for inspection of angular piece |
| CN112067689A (en) * | 2020-08-25 | 2020-12-11 | 南昌航空大学 | Interconnection differential type welding seam eddy current detection sensor |
| CN111983015A (en) * | 2020-08-25 | 2020-11-24 | 成都盛锴科技有限公司 | Vehicle frame weld joint detection system and detection method |
| CN113390954B (en) * | 2021-07-08 | 2023-06-13 | 中国石油大学(华东) | Underwater structure crack growth visual monitoring system based on alternating current electromagnetic field |
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