CN203720149U - Cross-shaped eddy current detection probe - Google Patents
Cross-shaped eddy current detection probe Download PDFInfo
- Publication number
- CN203720149U CN203720149U CN201420016517.5U CN201420016517U CN203720149U CN 203720149 U CN203720149 U CN 203720149U CN 201420016517 U CN201420016517 U CN 201420016517U CN 203720149 U CN203720149 U CN 203720149U
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- coil
- eddy current
- magnetic test
- test coil
- cross
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- 239000000523 sample Substances 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 title abstract description 15
- 238000012360 testing method Methods 0.000 claims description 46
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 8
- 230000006698 induction Effects 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model provides a cross-shaped eddy current detection probe. The cross-shaped eddy current detection probe comprises a shell, wherein a cross-shaped detection coil is packaged in the shell and comprises a round magnetic core, four clamping troughs are uniformly and circumferentially formed in the round magnetic core, each two symmetric clamping troughs are wound with varnished wires to form an X-direction detection coil and a Y-direction detection coil which are vertical to each other, and a coil direction mark is arranged on the round magnetic core. When excitation current is introduced to the coil, an eddy field with the direction close to a coil winding direction is generated in the surface of a to-be-detected component, and an induction signal received by the coil is strongest when a defect direction is vertical to eddy and is weakest when the defect direction is parallel with the eddy, so that the defect direction can be distinguished by virtue of a differential signal of the X-direction detection coil and the Y-direction detection coil when a detection effect is not influenced, and an eddy detection effect is improved.
Description
Technical field
The utility model relates to electromagnetic nondestructive field, relates in particular to a kind of cruciform eddy current probe for detection of surface, near surface flaw and direction thereof.
Background technology
In EDDY CURRENT, traditional putting type eddy current probe can detect the defect on surface and nearly surface, has higher detection sensitivity.But because the coil of traditional putting type eddy current probe is right cylinder or pie, thus while defect direction being detected, need to carry out scanning in defect and peripheral region thereof, and be vulnerable to the impact of defect shape and surface state.
Utility model content
Technical problem to be solved in the utility model is exactly for eddy current probe above shortcomings in prior art, a kind of cruciform eddy current probe is provided, start with from the shape and the distribution thereof that change coil, change its vortex field direction, thereby reach the function that detects defect and direction thereof.
For achieving the above object and other relevant objects, the utility model provides a kind of cruciform eddy current probe, comprise housing, in described housing, be packaged with a cross magnetic test coil, described cross magnetic test coil comprises a circular magnetic core, described circular magnetic core is uniform four draw-in grooves circumferentially, be wound with enameled wire and form orthogonal X to magnetic test coil and Y-direction magnetic test coil on every two symmetrical draw-in grooves, and described circular magnetic core is provided with coil direction and indicates.
Preferably, the inner bottom surface of described housing is provided with non-conductive, magnetic conduction protective seam, described cross magnetic test coil level is fixed on protective seam.
Preferably, described X is to poor 10% of the single magnetic test coil number of turn that is no more than of the number of turn of magnetic test coil and Y-direction magnetic test coil.
Preferably, in described housing, by epoxy or silica gel, described cross magnetic test coil is encapsulated.
Preferably, the enameled wire of described cross magnetic test coil is drawn with Eddy current detector and is connected in housing.
Preferably, described housing is provided with described coil direction and indicates consistent hand designations.
By above technical scheme, the utility model cruciform eddy current probe comprises vertically arranged X to magnetic test coil and Y-direction magnetic test coil, and two coils are autoexcitation from reception type magnetic test coil, and the magnetic induction density of coil improves.In the time leading to exciting current in coil, can form the direction vortex field close with coil winding direction on detected pieces surface, when defect direction during perpendicular to eddy current the received induced signal of coil the strongest, when defect direction level during in eddy current the received induced signal of coil the most weak, therefore in the situation that not affecting detection effect, can distinguish by X the direction of defect to the differential signal of magnetic test coil and Y-direction magnetic test coil, improve the effect of EDDY CURRENT.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model preferred embodiment;
Fig. 2 is the vertical view of the utility model cross magnetic test coil.
Element numbers explanation:
1 cross magnetic test coil
11 Y-direction magnetic test coils
12 X are to magnetic test coil
13 magnetic cores
14 coil direction indicate
2 housings
3 protective seams
4 encapsulating materials
5 enameled wires
Embodiment
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this instructions.
Refer to Fig. 1 to Fig. 2.Notice, appended graphic the illustrated structure of this instructions, ratio, size etc., all contents in order to coordinate instructions to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, all should still drop on the technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, in this instructions, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, changing under technology contents, when being also considered as the enforceable category of the utility model without essence.
Consult shown in Fig. 1, be shown as the structural representation of the utility model cruciform eddy current probe preferred embodiment, comprise housing 2, in housing 2, be packaged with a cross magnetic test coil 1, cross magnetic test coil 1 comprises a magnetic core 13, magnetic core 13 entirety are a pie, end face is circular, taking the magnetic core center of circle as true origin, along circumferentially opening a draw-in groove every 90 degree, in X-axis and in Y-axis, form respectively two groups of symmetrical draw-in grooves, four draw-in grooves measure-alike, the hierarchy structure of draw-in groove is relevant to the number of plies and the number of turn of the enameled wire of required coiling.As shown in Figure 2, on every two symmetrical draw-in grooves, be wound with enameled wire and form orthogonal X to magnetic test coil 12 and Y-direction magnetic test coil 11, two groups of coils are successively wound on magnetic core with the same or analogous number of turn with enameled wire, and the number of turn difference of two groups of magnetic test coils is no more than 10% of the single magnetic test coil number of turn.One jiao of magnetic core end face sprays a coil direction sign 14, for the location of coiling and installation process.Two coils are autoexcitation from reception type magnetic test coil, in the time leading to exciting current in coil, can form the direction vortex field close with coil winding direction on detected pieces surface, when defect direction during perpendicular to eddy current the received induced signal of coil the strongest, when defect direction level during in eddy current the received induced signal of coil the most weak.For X to defect, the induced signal of Y-direction magnetic test coil 11 is better than X to magnetic test coil 12; For the defect of Y-direction, X is better than Y-direction magnetic test coil 11 to the induced signal of magnetic test coil 12.And vertically arranged two coils can significantly improve the magnetic induction density of coil mutually, and then strengthen EDDY CURRENT effect.When two magnetic test coils of detection probe connect with difference form, connect and possess the direction that can judge by the variation of signal phase angle defect after the Eddy current detector of impedance analysis function.
Cross magnetic test coil 1 lies in a horizontal plane in housing 2; its enamel-cover line end upward; the protective seam 3 of its bottom surface and housing inner bottom surface uses glue adhesion; when fixing, keep the level of cross magnetic test coil 1 and coil towards correctly, and it is consistent to ensure that hand designations on housing 2 and coil direction indicate 14 directions.Four enameled wires 5 of cross magnetic test coil 1 are drawn from housing 2, then inject encapsulating material 4(epoxy or silica gel in housings 2) encapsulate, prevent rocking, rotating and moving in testing process.
Protective seam 3 can be that material of the same race can be also unlike material with housing 2, and protective seam 3 is generally non-conductive, permeability magnetic material.
Cruciform eddy current probe can be connected and carry out scanning manually or automatically with having the Eddy current detector of impedance analysis function or have Eddy current detector that C sweeps function.Before detection, need to adopt and be carved with X to being configured and checking with the test specimen of Y-direction defect, then change to distinguish the direction of flaw indication by analyzing the phase place of differential path signal.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all can, under spirit of the present utility model and category, modify or change above-described embodiment.Therefore, have in technical field under such as and conventionally know that the knowledgeable modifies or changes not departing from all equivalences that complete under spirit that the utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (6)
1. a cruciform eddy current probe, comprise housing, it is characterized in that, in described housing, be packaged with a cross magnetic test coil, described cross magnetic test coil comprises a circular magnetic core, described circular magnetic core is uniform four draw-in grooves circumferentially, be wound with enameled wire and form orthogonal X to magnetic test coil and Y-direction magnetic test coil on every two symmetrical draw-in grooves, and described circular magnetic core is provided with coil direction and indicates.
2. cruciform eddy current probe according to claim 1, is characterized in that, the inner bottom surface of described housing is provided with non-conductive, magnetic conduction protective seam, and described cross magnetic test coil level is fixed on protective seam.
3. cruciform eddy current probe according to claim 1, is characterized in that, described X is to poor 10% of the single magnetic test coil number of turn that is no more than of the number of turn of magnetic test coil and Y-direction magnetic test coil.
4. cruciform eddy current probe according to claim 1, is characterized in that, in described housing, by epoxy or silica gel, described cross magnetic test coil is encapsulated.
5. cruciform eddy current probe according to claim 1, is characterized in that, the enameled wire of described cross magnetic test coil is drawn with Eddy current detector and is connected in housing.
6. cruciform eddy current probe according to claim 1, is characterized in that, described housing is provided with described coil direction and indicates consistent hand designations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016517.5U CN203720149U (en) | 2014-01-10 | 2014-01-10 | Cross-shaped eddy current detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016517.5U CN203720149U (en) | 2014-01-10 | 2014-01-10 | Cross-shaped eddy current detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720149U true CN203720149U (en) | 2014-07-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420016517.5U Expired - Lifetime CN203720149U (en) | 2014-01-10 | 2014-01-10 | Cross-shaped eddy current detection probe |
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| Country | Link |
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| CN (1) | CN203720149U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806932A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Crack signal-distinguishing eddy current detection sensor and manufacturing method thereof |
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
| CN110763755A (en) * | 2019-10-29 | 2020-02-07 | 广东省特种设备检测研究院珠海检测院 | Evaluation method capable of rapidly evaluating crack defect direction of metal material |
| CN111766295A (en) * | 2020-07-31 | 2020-10-13 | 广东汕头超声电子股份有限公司 | Eddy current detection probe for detecting steel rail welding seam and detection method thereof |
-
2014
- 2014-01-10 CN CN201420016517.5U patent/CN203720149U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806932A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Crack signal-distinguishing eddy current detection sensor and manufacturing method thereof |
| CN107167516A (en) * | 2017-05-24 | 2017-09-15 | 昆明理工大学 | Double difference dynamic formula pulse eddy current probe unit, array probe and detection means |
| CN107167516B (en) * | 2017-05-24 | 2023-09-26 | 昆明理工大学 | Double differential pulse eddy current probe unit, array probe and detection device |
| CN110763755A (en) * | 2019-10-29 | 2020-02-07 | 广东省特种设备检测研究院珠海检测院 | Evaluation method capable of rapidly evaluating crack defect direction of metal material |
| CN111766295A (en) * | 2020-07-31 | 2020-10-13 | 广东汕头超声电子股份有限公司 | Eddy current detection probe for detecting steel rail welding seam and detection method thereof |
| CN111766295B (en) * | 2020-07-31 | 2022-12-13 | 广东汕头超声电子股份有限公司 | Eddy current detection probe for detecting steel rail welding seam and detection method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140716 |
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| CX01 | Expiry of patent term |