CN217034107U - Double-excitation alternating-current electromagnetic field detection probe - Google Patents
Double-excitation alternating-current electromagnetic field detection probe Download PDFInfo
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- CN217034107U CN217034107U CN202220555709.8U CN202220555709U CN217034107U CN 217034107 U CN217034107 U CN 217034107U CN 202220555709 U CN202220555709 U CN 202220555709U CN 217034107 U CN217034107 U CN 217034107U
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 239000000523 sample Substances 0.000 title claims abstract description 24
- 230000005672 electromagnetic field Effects 0.000 title claims abstract description 14
- 230000005284 excitation Effects 0.000 claims abstract description 50
- 238000012545 processing Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims abstract description 7
- 230000006698 induction Effects 0.000 claims description 5
- 230000007547 defect Effects 0.000 abstract description 19
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
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Abstract
The invention provides a double-excitation alternating current electromagnetic field detection probe which comprises a fixing screw, a gland, a signal processing circuit, an excitation module, a TMR magnetic sensor, a Raymond joint and a shell. TMR magnetic sensor installs the bottom at the shell, pick up the magnetic field signal of distortion, excitation module installs directly over TMR magnetic sensor, including excitation coil and U type magnetic core, excitation coil evenly winds on U type magnetic core, excitation module is equipped with two, constitute two excitation, and the winding opposite direction of two excitation coils, signal processing circuit installs the top at excitation module, the signal to TMR magnetic sensor output carries out the amplification filtering process, the one side at the shell is installed to the leimo joint, transmit signal between test probe and quick-witted case. The double-excitation alternating current magnetic field detection probe provided by the invention is simple to operate, can distinguish a defect signal from a jitter signal by analyzing signals under double excitation, realizes accurate identification of defects, and reduces the defect misjudgment rate.
Description
Technical Field
The invention relates to the field of detection probes, in particular to a double-excitation alternating current electromagnetic field detection probe.
Background
An Alternating current magnetic field detection (ACFM) technology is a novel electromagnetic nondestructive detection technology, the basic principle of which is an electromagnetic induction principle, a sinusoidal Alternating current signal is loaded on an excitation coil, an induction magnetic field is excited on the surface of a workpiece to be detected, so that induction current is generated, the induction current deflects and gathers at the positions of defects such as cracks, corrosion and the like, the space magnetic field above the defects is distorted, and a detection sensor is used for measuring a space distortion magnetic field signal, so that the detection and evaluation of the defects are realized. The technology can realize the rapid detection and quantitative evaluation of the surface defects of the conductive material, does not need a coupling agent between the probe and the workpiece, is simple to operate, and is widely applied to nondestructive testing in the fields of aerospace, petroleum, railways and the like.
The conventional ACFM detection probe realizes defect identification through scanning acquired X-direction magnetic field (BX signal) and Z-direction magnetic field (BZ signal), but because distorted magnetic field signals can also appear under shaking in the technology, the technology is easy to mix with defect signals, defect identification is difficult, and accurate analysis of detection personnel is not facilitated. The invention designs a double-excitation alternating current electromagnetic field detection probe based on an alternating current electromagnetic field detection technology, and can accurately distinguish a defect signal and a jitter signal by utilizing the rule that the defect signal appears at different positions and the jitter signal appears at the same position, thereby realizing accurate identification of the defect and reducing the defect misjudgment rate.
Disclosure of Invention
The invention aims to design a double-excitation alternating current electromagnetic field detection probe aiming at the defects of the prior art, so that the defects are accurately identified, and the defect misjudgment rate is reduced.
The embodiment of the application provides a double-excitation alternating current electromagnetic field detection probe. Double excitation alternating current magnetic field test probe includes set screw, gland, signal processing circuit, excitation module, TMR magnetic sensor, thunder mo joint, shell, and TMR magnetic sensor level is placed in the shell bottom, and excitation module installs directly over TMR magnetic sensor, and signal processing circuit installs the top at excitation module, and thunder mo joint installs the one side at the shell, transmits signal between test probe and quick-witted case, and four angles of gland are equipped with the through-hole, through set screw fixed shell. The excitation module comprises an excitation coil and a U-shaped magnetic core, the excitation coil is uniformly wound on the U-shaped magnetic core, and an induction magnetic field is excited by loading uniform alternating current on the excitation coil; the TMR magnetic sensor picks up the distorted magnetic field signal, and the distorted magnetic field signal is amplified and filtered by the signal processing circuit.
Further, the two excitation modules are arranged to form double excitation, and the winding directions of the excitation coils are opposite.
Further, the shell includes shell main part, first terrace with edge, recess, second terrace with edge, screw hole, mounting hole, and the recess is established in the bottom of shell, installs TMR magnetic sensor, and first terrace with edge symmetric distribution is in four angles of shell, and second terrace with edge symmetric distribution is both sides around the shell, and first terrace with edge and the fixed excitation module of second terrace with edge, screw hole and set screw cooperation, fixed shell and gland, mounting hole and the connector interference fit of thunder mo.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the beneficial technical effects that:
(1) the detection method is simple and does not need a coupling agent
(2) The defects can be accurately identified by double excitation signals, and the misjudgment rate is reduced
(3) The requirement on detection personnel is low, and the defect identification is not influenced by the jitter caused by improper operation
(4) Simple operation and easy operation
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is an overall schematic diagram of a dual excitation AC electromagnetic field detection probe in the embodiment of the present application
FIG. 2 is an exploded view of a dual excitation AC electromagnetic field detecting probe according to an embodiment of the present application
FIG. 3 is an assembly diagram of a dual excitation AC electromagnetic field detection probe in the embodiment of the present application
FIG. 4 is a schematic structural diagram of a housing according to an embodiment of the present application
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides a double-excitation alternating current electromagnetic field detection probe. As shown in fig. 1 to 3, the dual excitation ac electromagnetic field detection probe includes a fixing screw 10, a pressing cover 20, a signal processing circuit 30, an excitation module 40, a TMR magnetic sensor 50, a rem connector 60, and a housing 70, wherein the TMR magnetic sensor 50 is horizontally disposed at the bottom of the housing 70, the excitation module 40 is installed right above the TMR magnetic sensor 50, the signal processing circuit 30 is installed at the top end of the excitation module 40, the rem connector 60 is installed at one side of the housing 70, signals are transmitted between the detection probe and the chassis, through holes are provided at four corners of the pressing cover 20, and the housing 70 is fixed by the fixing screw 10. The excitation module 40 comprises an excitation coil 401 and a U-shaped magnetic core 402, wherein the excitation coil 401 is uniformly wound on the U-shaped magnetic core 402, and an induced magnetic field is excited by loading uniform alternating current on the excitation coil 401; the TMR magnetic sensor 50 picks up the distorted magnetic field signal, and performs amplification and filtering processing by the signal processing circuit 30.
Further, the excitation modules 40 are provided with two excitation modules, which form a dual excitation, and the winding directions of the excitation coils 401 are opposite.
Further, as shown in fig. 4, the housing 70 includes a housing main body 701, a first terrace 702, a groove 703, a second terrace 704, a threaded hole 705, and a mounting hole 706, the groove 703 is provided at the bottom of the housing 70, the TMR magnetic sensor 50 is mounted, the first terrace 702 is symmetrically distributed at four corners of the housing 70, the second terrace 704 is symmetrically distributed at front and rear sides of the housing 70, the first terrace 702 and the second terrace 704 fix the excitation module 40, the threaded hole 705 is matched with the fixing screw 10, the housing 70 and the gland 20 are fixed, and the mounting hole 706 is in interference fit with the leimo joint 60.
Claims (3)
1. A double-excitation alternating current electromagnetic field detection probe is characterized by comprising a fixing screw, a gland, a signal processing circuit, an excitation module, a TMR magnetic sensor, a Raymond joint and a shell;
the TMR magnetic sensor is horizontally placed at the bottom of the shell, the excitation module is installed right above the TMR magnetic sensor, the signal processing circuit is installed at the top end of the excitation module, the Raymond connector is installed at one side of the shell, signals are transmitted between the detection probe and the chassis, through holes are formed in four corners of the gland, and the shell is fixed through the fixing screws;
the excitation module comprises an excitation coil and a U-shaped magnetic core, the excitation coil is uniformly wound on the U-shaped magnetic core, and an induction magnetic field is excited by loading uniform alternating current on the excitation coil;
the TMR magnetic sensor picks up the distorted magnetic field signal, and the distorted magnetic field signal is amplified and filtered by the signal processing circuit.
2. The probe of claim 1, wherein two excitation modules are provided to form a double excitation, and the excitation coils are wound in opposite directions.
3. The probe of claim 1, wherein the housing comprises a housing body, a first ledge, a recess, a second ledge, a threaded hole, and a mounting hole, the recess is formed in the bottom of the housing for mounting the TMR magnetic sensor, the first ledge is symmetrically disposed at four corners of the housing, the second ledge is symmetrically disposed at the front and rear sides of the housing, the first and second ledges fix the excitation module, the threaded hole is engaged with the fixing screw to fix the housing and the cover, and the mounting hole is interference-fitted with the remo-connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220555709.8U CN217034107U (en) | 2022-03-15 | 2022-03-15 | Double-excitation alternating-current electromagnetic field detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220555709.8U CN217034107U (en) | 2022-03-15 | 2022-03-15 | Double-excitation alternating-current electromagnetic field detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217034107U true CN217034107U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220555709.8U Expired - Fee Related CN217034107U (en) | 2022-03-15 | 2022-03-15 | Double-excitation alternating-current electromagnetic field detection probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217034107U (en) |
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2022
- 2022-03-15 CN CN202220555709.8U patent/CN217034107U/en not_active Expired - Fee Related
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