CN201935897U - Multi-phase multi-pole eddy current probe - Google Patents
Multi-phase multi-pole eddy current probe Download PDFInfo
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- CN201935897U CN201935897U CN2010206878252U CN201020687825U CN201935897U CN 201935897 U CN201935897 U CN 201935897U CN 2010206878252 U CN2010206878252 U CN 2010206878252U CN 201020687825 U CN201020687825 U CN 201020687825U CN 201935897 U CN201935897 U CN 201935897U
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- probe
- receiving coil
- drive coil
- iron core
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Abstract
The utility model discloses a multi-phase multi-pole eddy current probe, which comprises a probe iron core, a probe holder, a connection terminal, an exciting coil group and a receiving coil group. The exciting coil group is used for receiving the exciting current of different phases, so as to generate multi-magnetic-pole rotary scanning magnetic field, the receiving coil group is used for receiving the detection signal after the multi-magnetic pole rotary scanning magnetic field scans an object to be detected; the exciting coil group and the receiving coil group are correspondingly placed in a slot of the probe iron, so as to form a multi-magnetic-pole magnetic circuit; the probe iron core and the connection terminal are installed on the probe holder, the connection terminal is used for connecting the exciting coil group and the receiving coil group. The multi-phase multi-pole eddy current detecting magnetic field rotatably scans over the space formed by the probe iron core, so as to detect the default of the object. The electromagnetic non-destructive testing probe has the advantages of simple and reliable structure as well as flexibility and convenience in operation, and is suitable for detecting a conductor material with symmetrical section structure.
Description
Technical field
The utility model relates to the electromagnetic nondestructive field, relates in particular to a kind of heterogeneous many magnetic poles eddy current probe.
Background technology
Along with the requirement of quality monitoring is more and more stricter, Dynamic Non-Destruction Measurement is also had higher requirement.In industrially developed country, Non-Destructive Testing is arranged side by side with design, material, manufacturing (technology), become four big gordian techniquies of industrial circle, many relevant industries such as machinery, petrochemical industry, Aeronautics and Astronautics, automobile, pressure vessel, railway, road, nuclear industry and technical field are played an important role.
When existing eddy detection technology detects many materials such as tubing, wire rods, material require passes drive coil and receiving coil, material surface is axially perpendicular to the electromagnetic field that drive coil produces, therefore the axial defective of material surface is bigger to the influence of excitation electromagnetic field, is easy to detect; And material surface is circumferential owing to be parallel to the electromagnetic field that drive coil produces, the circumferential defective of material surface is smaller for the influence that detects magnetic field, be difficult to discern by receiving coil, make and have eddy detection technology now, because eddy current probe is insensitive to the circumferential defective of material, is easy to cause omission, influences the quality of material and Related product, therefore, eddy current probe is badly in need of being improved.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, a kind of heterogeneous many magnetic poles eddy current probe is provided, it is insensitive to the circumferential defective of material that the utility model has overcome the prior art eddy current probe, is easy to cause the technical matters of omission.
The utility model is achieved through the following technical solutions:
A kind of heterogeneous many magnetic poles eddy current probe, this probe comprises: probe iron core, probe bracket, connection terminal, drive coil group and receiving coil group, described drive coil group is used to receive the exciting current of out of phase, produce many magnetic poles rotation sweep magnetic field, described receiving coil group is used to receive the detection signal behind many magnetic poles rotation sweep field scan object under test;
Described drive coil group and receiving coil group correspondence are positioned in the wire casing of probe iron core, are used to constitute the magnetic circuit of many magnetic poles;
Described probe iron core, connection terminal are installed on the probe bracket, and described connection terminal is used to connect drive coil group and receiving coil group;
Described drive coil group is identical with the number of turn of receiving coil group, and is installed in the same wire casing;
Described probe iron core is an annular iron core, and the wire casing span of described drive coil group and receiving coil group is identical;
Described drive coil group comprises the drive coil of two polyphones at least, and described receiving coil group comprises the receiving coil of two polyphones at least;
The group number of described drive coil group and receiving coil group is consistent, and has 3 groups at least.
Specifically, drive coil is used to receive the exciting current of out of phase, produces many magnetic poles rotation sweep magnetic field; For the structure of m phase n to magnetic pole, its drive coil number is m*n, the number of turn of each coil is identical, the connected mode of coil is that n coil series connection constitutes the m group, be distributed in 2*m*n the wire casing in the probe iron core, m phase drive coil is at space distribution phase difference of pi/m radian each other, and the groove number that each coil is crossed over is m;
Receiving coil is used to receive the detection signal behind many magnetic poles rotation sweep field scan object under test; For the structure of m phase n to magnetic pole, its receiving coil number is m*n, the number of turn of each coil is identical, the connected mode of coil is that n coil series connection constitutes the m group, be distributed in 2*m*n the wire casing in the probe iron core, m phase drive coil is at space distribution phase difference of pi/m radian each other, and the groove number that each coil is crossed over is m;
M*n drive coil is corresponding one by one with m*n receiving coil in the probe, and each drive coil is with in receiving coil all is distributed in identical wire casing, and drive coil and receiving coil also can be merged into an excitation receiving coil;
The utility model has following advantage with respect to prior art: by making heterogeneous many magnetic poles EDDY CURRENT magnetic field rotation sweep on the probe space that iron core surrounded, carry out the detection of detected materials defective.This electromagnetic nondestructive test probe has characteristics simple and reliable and flexible and convenient to use, is suitable for detecting the conductor material with symmetrical section structure.
Description of drawings
Fig. 1 is the structural representation of the heterogeneous many magnetic poles eddy current probe of the utility model.
Fig. 2 is the circuit connection diagram of the utility model heterogeneous many magnetic poles eddy current probe drive coil and receiving coil.
Fig. 3 is many magnetic pole and magnetic fields synoptic diagram that the heterogeneous many magnetic poles eddy current probe of the utility model produces.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment:
As shown in Figure 1, the heterogeneous many magnetic poles eddy current probe of the utility model, this probe comprises: probe iron core 3, probe bracket 5, connection terminal 4, drive coil group 1 and receiving coil group 2, described drive coil group 1 is used to receive the exciting current of out of phase, produce many magnetic poles rotation sweep magnetic field, described receiving coil group 2 is used to receive the detection signal behind many magnetic poles rotation sweep field scan object under test;
Described drive coil group 1 and receiving coil group 2 correspondence one by one are positioned in the wire casing of probe iron core 3, are used to constitute the magnetic circuit of many magnetic poles;
Described probe iron core 3, connection terminal 4 are installed on the probe bracket 5, and described connection terminal 4 is used to connect drive coil group 1 and receiving coil group 2.
Described drive coil group 1 is identical with the number of turn of receiving coil group 2, and is installed in the same wire casing.
Described probe iron core 3 is an annular iron core, and described drive coil group 1 is identical in the wire casing span of probe iron core 3 with receiving coil group 2.
Described drive coil group 1 comprises the drive coil of two polyphones at least, and described receiving coil group 2 comprises the receiving coil of two polyphones at least.
The group number of described drive coil group 1 and receiving coil group 2 is consistent, and has 5 groups at least.
Specifically, as Fig. 2, shown in Figure 3, number of phases m is the integer more than or equal to 3, and magnetic pole logarithm n is the integer more than or equal to 2; Drive coil is used to receive the exciting current of out of phase, produces many magnetic poles rotation sweep magnetic field; For the structure of m phase n to magnetic pole, its drive coil number is m*n, the number of turn of each coil is identical, the connected mode of coil is that n coil series connection constitutes the m group, be distributed in 2*m*n the wire casing in the probe iron core, m phase drive coil is at space distribution phase difference of pi/m radian each other, and the groove number that each coil is crossed over is m; Receiving coil is used to receive the detection signal behind many magnetic poles rotation sweep field scan object under test; For the structure of m phase n to magnetic pole, its receiving coil number is m*n, the number of turn of each coil is identical, the connected mode of coil is that n coil series connection constitutes the m group, be distributed in 2*m*n the wire casing in the probe iron core, m phase drive coil is at space distribution phase difference of pi/m radian each other, and the groove number that each coil is crossed over is m; M*n drive coil is corresponding one by one with m*n receiving coil in the probe, and each drive coil is with in receiving coil all is distributed in identical wire casing, and drive coil and receiving coil also can be merged into an excitation receiving coil;
As Fig. 2, Fig. 3, for m phase n to the magnetic pole eddy current probe, have m*n group drive coil group 1 to be respectively: W11, W12 ..., W1n ..., Wm1, Wm2 ..., Wmn, with receiving coil group 2 be R11, R12 ..., R1n ..., Rm1, Rm2 ..., Rmn, in m drive coil group 1, pass among Fig. 2 m phase sinusoidal current i1, i2 ..., im, described sinusoidal current can be expressed as respectively:
i1＝I×sin(wt)
i2＝I×sin(wt-2π/m)
……
im＝I×sin(wt-2(m-1)π/m)
The signal that receives by m group of received coil group 2 be respectively R1, R2 ..., Rm, be used to output to and detect main frame and carry out signal Processing.
To the magnetic pole eddy current probe, the many magnetic pole and magnetic fields synoptic diagram that is produced by drive coil group 1 is by shown in Figure 3 for m phase n.
Just can realize the utility model preferably as mentioned above.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (5)
1. heterogeneous many magnetic poles eddy current probe, it is characterized in that, this probe comprises: probe iron core, probe bracket, connection terminal, drive coil group and receiving coil group, described drive coil group is used to receive the exciting current of out of phase, produce many magnetic poles rotation sweep magnetic field, described receiving coil group is used to receive the detection signal behind many magnetic poles rotation sweep field scan object under test;
Described drive coil group and receiving coil group correspondence are positioned in the wire casing of probe iron core, are used to constitute the magnetic circuit of many magnetic poles;
Described probe iron core, connection terminal are installed on the probe bracket, and described connection terminal is used to connect drive coil group and receiving coil group.
2. heterogeneous many magnetic poles eddy current probe according to claim 1 is characterized in that described drive coil group is identical with the number of turn of receiving coil group, and is installed in the identical wire casing.
3. heterogeneous many magnetic poles eddy current probe according to claim 1 is characterized in that described probe iron core is an annular iron core, and the wire casing span of described drive coil group and receiving coil group is identical.
4. heterogeneous many magnetic poles eddy current probe according to claim 1 is characterized in that described drive coil group comprises the drive coil of two polyphones at least, and described receiving coil group comprises the receiving coil of two polyphones at least.
5. heterogeneous many magnetic poles eddy current probe according to claim 1 is characterized in that, the group number of described drive coil group and receiving coil group is consistent, and has 3 groups at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206878252U CN201935897U (en) | 2010-12-29 | 2010-12-29 | Multi-phase multi-pole eddy current probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206878252U CN201935897U (en) | 2010-12-29 | 2010-12-29 | Multi-phase multi-pole eddy current probe |
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| Publication Number | Publication Date |
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| CN201935897U true CN201935897U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206878252U Expired - Fee Related CN201935897U (en) | 2010-12-29 | 2010-12-29 | Multi-phase multi-pole eddy current probe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095795A (en) * | 2010-12-29 | 2011-06-15 | 华南理工大学 | Multiphase multi-magnetic pole eddy current probe |
| CN106324085A (en) * | 2016-08-30 | 2017-01-11 | 中国海洋石油总公司 | Pulse eddy current testing probe |
| CN106767368A (en) * | 2016-09-18 | 2017-05-31 | 中国石油大学(华东) | One kind is based on circumferential electric field pipe surface shear crack measurement apparatus and method |
| CN111287733A (en) * | 2019-10-11 | 2020-06-16 | 中国石油大学(华东) | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth |
-
2010
- 2010-12-29 CN CN2010206878252U patent/CN201935897U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095795A (en) * | 2010-12-29 | 2011-06-15 | 华南理工大学 | Multiphase multi-magnetic pole eddy current probe |
| CN106324085A (en) * | 2016-08-30 | 2017-01-11 | 中国海洋石油总公司 | Pulse eddy current testing probe |
| CN106767368A (en) * | 2016-09-18 | 2017-05-31 | 中国石油大学(华东) | One kind is based on circumferential electric field pipe surface shear crack measurement apparatus and method |
| CN106767368B (en) * | 2016-09-18 | 2018-07-31 | 中国石油大学(华东) | One kind being based on circumferential electric field pipe surface shear crack measuring device and method |
| CN111287733A (en) * | 2019-10-11 | 2020-06-16 | 中国石油大学(华东) | Method for detecting sucker rod of externally-penetrated rotating magnetic field well mouth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20131229 |