CN211122662U - Support for magnetic resistance element of nondestructive testing sensor and sensor - Google Patents
Support for magnetic resistance element of nondestructive testing sensor and sensor Download PDFInfo
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- CN211122662U CN211122662U CN201921884799.XU CN201921884799U CN211122662U CN 211122662 U CN211122662 U CN 211122662U CN 201921884799 U CN201921884799 U CN 201921884799U CN 211122662 U CN211122662 U CN 211122662U
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Abstract
The invention provides a support and a sensor for a magnetic resistance element of a nondestructive testing sensor, which comprise a first L template and a second L template which are identical in size, parallel to each other and arranged oppositely, wherein the vertical edges of vertical arms of the first L0 template and the second L1 template are flush and connected through a first rectangular plate, the width of the vertical arm of the first L2 template is larger than the length of the long side of a rectangular fixing plate of the magnetic resistance element, the height of a cross arm of the second L3 template is larger than the length of the short side of the rectangular fixing plate of the magnetic resistance element, the transverse edges of the vertical arms of the first L template and the second L template are flush, the rectangular fixing plate of the first magnetic resistance element is horizontally arranged on the upper sides of the vertical arms of the first L template and the second L template, the outer edges of the cross arms of the first L template and the second L template are flush, and the rectangular fixing plate of the second magnetic resistance element is vertically arranged on the upper sides of the cross arms of the first L template and the second L, the detection of X-direction magnetic signals and the Z-direction magnetic signals can be realized by combining the.
Description
Technical Field
The disclosure relates to the technical field of nondestructive testing, in particular to a support for a magnetoresistive element of a nondestructive testing sensor and the sensor.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Because modern mechanical equipment has complex operating environment and more damage types, and various nondestructive testing technologies have different advantages and defects and testing ranges, the integration of a plurality of testing technologies and the manufacture of multifunctional testing devices are important development trends of nondestructive testing, and scholars at home and abroad also develop a large amount of device researches to obtain primary results. At present, multifunctional magnetic nondestructive detection sensors are less researched, which is an important development direction of future nondestructive detection, and a new detection method combining a certain magnetic technology with other nondestructive detection technologies has been researched.
The inventor of the present disclosure finds that most of the current magnetoresistive elements can only realize detection in one magnetic field direction, and detection of cracks in different directions and positions needs to be realized by arranging and combining a plurality of magnetoresistive elements, but no support for realizing detection of 360 ° magnetic signals by arranging and combining the magnetoresistive elements exists at present.
Disclosure of Invention
In order to solve the deficiency of the prior art, the present disclosure provides a support and a sensor for a magnetic resistance element of a nondestructive testing sensor, wherein two magnetic resistance elements which are perpendicular to each other are placed on each support, so that the detection of an X-direction magnetic signal and a Z-direction magnetic signal is realized, and the magnetic field detection of 360 degrees is realized by arranging and combining the supports.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
the first aspect of the present disclosure provides a support for a magnetoresistive element of a nondestructive inspection sensor.
A support for a magnetic resistance element of a nondestructive testing sensor comprises a first L template and a second L template which are the same in size, parallel to each other and arranged oppositely, wherein the first L template and the second L template both have certain thickness, the vertical edges of vertical arms of the first L template and the second L template are flush and connected through a first rectangular plate, the widths of the vertical arms of the first L template and the second L template are larger than the length of a long edge of a rectangular fixing plate of the magnetic resistance element, and the lengths of cross arms of the first L template and the second L template are larger than the thickness of the rectangular fixing plate of the magnetic resistance element;
the transverse edges of the vertical arms of the first L-shaped plate and the second L-shaped plate are flush, the rectangular fixing plate of the first reluctance element is horizontally arranged on the upper sides of the vertical arms of the first L-shaped plate and the second L-shaped plate, the outer edges of the cross arms of the first L-shaped plate and the second L-shaped plate are flush, and the rectangular fixing plate of the second reluctance element is vertically arranged on the upper sides of the cross arms of the first L-shaped plate and the second L-shaped plate.
As some possible implementations, the first and second magnetoresistive elements are both rectangular elements, and long sides of the first and second magnetoresistive elements are both parallel to short sides of the corresponding rectangular fixing plate, and lengths of the long sides of the first and second magnetoresistive elements are both less than or equal to lengths of the short sides of the corresponding rectangular fixing plate.
As some possible implementations, the vertical arm width and the horizontal arm height of the first L template and the second L template are the same.
As some possible implementations, the distance between the outer edges of the upper sides of the vertical arms of the first L shaped plate and the second L shaped plate is equal to the length of the short side of the rectangular fixing plate.
As some possible implementations, the distance between the outer edges of the upper sides of the cross arms of the first L-shaped plate and the second L-shaped plate is equal to the length of the short side of the rectangular fixing plate.
As some possible implementations, the length of the upper side of the cross arm of the first L-shaped plate and the second L-shaped plate is greater than or equal to the sum of the thicknesses of the second magnetoresistive element and the rectangular fixed plate thereof.
A second aspect of the present disclosure provides a multifunctional nondestructive testing sensor.
A multifunctional nondestructive detection sensor comprises a signal receiving element and a magnetization element, wherein the signal receiving element comprises at least seven horizontal magnetoresistive elements in the same plane, at least three magnetoresistive elements are arranged end to end in a straight line, at least two magnetoresistive elements are arranged on two sides of the straight line formed by the three magnetoresistive elements respectively, and the magnetoresistive elements on each side are uniformly arranged on two sides of a perpendicular bisector of the straight line formed by the three magnetoresistive elements and form a certain included angle with the perpendicular bisector;
the magnetizing element comprises six exciting coils and corresponding yoke plates, nylon frameworks, magnetic cores and pole shoes, the yoke plates are circular yoke plates, the magnetic cores are arranged in the nylon frameworks, one ends of the nylon frameworks are fixed on the yoke plates, the other ends of the nylon frameworks are fixed with the pole shoes, the six nylon frameworks are uniformly fixed on the upper surfaces of the circular yoke plates, the exciting coils are wound on the nylon frameworks, and the polarities of the two adjacent exciting coils are opposite;
the signal receiving element also comprises a same number of vertical magnetoresistive elements which are vertically arranged with the long sides of the horizontal magnetoresistive elements, and each horizontal magnetoresistive element comprises a corresponding vertical magnetoresistive element;
the signal receiving element is arranged in a space defined by six excitation coils, and is fixed on the yoke plate through the support in the first aspect of the disclosure, the yoke plate is fixed on the support frame, and the support frame is used for being fixed with the moving device to realize the movement detection on the test piece.
As some possible realization modes, the magnetic resistance sensor comprises seven horizontal magnetic resistance elements, wherein three magnetic resistance elements are arranged end to end in a straight line, two magnetic resistance elements are arranged on two sides of the straight line respectively, the two magnetic resistance elements are arranged on two sides of the perpendicular bisector respectively, and the long sides of the two magnetic resistance elements form an included angle of 45 degrees with the perpendicular bisector.
As some possible realization modes, each excitation coil is formed by winding enameled wires of 0.23mm on a nylon framework for a plurality of circles.
As possible realization modes, two adjacent exciting coils are wound by the same enameled wire in opposite directions, sinusoidal exciting signals with phases of 120 degrees are introduced into three groups of coils, each group of coils generates a closed variable magnetic field, and the three groups of magnetic fields are mutually coupled to finally form a rotating magnetic field with variable directions.
Compared with the prior art, the beneficial effect of this disclosure is:
1. the bracket can be used for placing two mutually perpendicular magnetic resistance elements, so that the detection of X-direction magnetic signals and Z-direction magnetic signals is realized, and the detection of 360-degree magnetic field components can be realized by arranging and combining a plurality of brackets carrying the magnetic resistance elements.
2. The bracket is of a hollow structure, so that the influence on magnetic lines is greatly reduced, and the induction capability of the magnetoresistive element on the magnetic lines is improved.
3. The support compact, thereby to the range of a plurality of supports in the narrow and small space that can realize to realize the magnetic field signal measurement of a plurality of angles.
4. The support is composed of L-type plates with the same size, so that arrangement without dead angles can be realized during arrangement, and linear arrangement of a plurality of magnetoresistive elements can be guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a support for a magnetoresistive element of a nondestructive inspection sensor according to embodiment 1 of the present disclosure.
Fig. 2 is a schematic structural diagram of a nondestructive testing sensor according to embodiment 2 of the present disclosure.
Fig. 3 is a schematic diagram of the operation of the multifunctional nondestructive testing sensor in the testing process of embodiment 2 of the present invention.
1-a first L template, 2-a second L template, 3-a first magneto-resistive element, 4-a first rectangular fixing plate, 5-a second magneto-resistive element, 6-a second rectangular fixing plate.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example 1:
as shown in fig. 1, embodiment 1 of the present disclosure provides a support for a magnetic resistance element of a nondestructive testing sensor, including a first L-shaped plate 1 and a second L-shaped plate 2 which have the same size and are parallel to each other and are disposed oppositely, each of the first L-shaped plate and the second L-shaped plate has a certain thickness, vertical edges of vertical arms of the first L-shaped plate 1 and the second L-shaped plate 2 are flush and are connected by a first rectangular plate, widths of the vertical arms of the first L-shaped plate and the second L-shaped plate are greater than a length of a long side of a rectangular fixing plate of the corresponding magnetic resistance element, and a length of a cross arm of the first L-shaped plate and the second L-shaped plate is greater than a thickness of the rectangular fixing plate of the corresponding magnetic;
the transverse edges of the vertical arms of the first L template 1 and the second L template 2 are flush, the first rectangular fixing plate 4 is horizontally arranged on the upper sides of the vertical arms of the first L template 1 and the second L template 2, the outer edges of the cross arms of the first L template 1 and the second L template 2 are flush, the second rectangular fixing plate 6 of the second reluctance element 5 is vertically arranged on the upper sides of the cross arms of the first L template 1 and the second L template 2, and the second rectangular fixing plate 6 is attached to the edges of the vertical arms of the first L template 1 and the second L template 2.
One long side of the first rectangular fixing plate 4 is flush with the upper lateral outer edge of the vertical arm of the first L template 1, the other long side of the first rectangular fixing plate 4 is flush with the upper lateral outer edge of the vertical arm of the second L template 2, one long side of the second rectangular fixing plate 6 is flush with the vertical edge of the vertical arm of the first L template 1, and the other long side of the second rectangular fixing plate 6 is flush with the vertical outer edge of the second L template 2.
The first magnetic resistance element 3 and the second magnetic resistance element 5 are both rectangular elements, long sides of the first magnetic resistance element 3 and the second magnetic resistance element 5 are both parallel to short sides of the corresponding rectangular fixing plates, and the length of the long sides of the first magnetic resistance element 3 and the second magnetic resistance element 5 is smaller than or equal to that of the short sides of the corresponding rectangular fixing plates.
The vertical arm width and the cross arm height of the first L template 1 and the second L template 2 are the same.
The distance between the outer edges of the upper sides of the vertical arms of the first L shaped plate 1 and the second L shaped plate 2 is equal to the length of the short side of the first rectangular fixing plate or the second rectangular fixing plate.
The distance between the outer edges of the upper sides of the cross arms of the first L template 1 and the second L template 2 is equal to the length of the short side of the first rectangular fixing plate or the second rectangular fixing plate.
The length of the upper side of the cross arm of the first L-shaped plate 1 and the second L-shaped plate 2 is larger than or equal to the sum of the thicknesses of the second magnetoresistive element 5 and the second rectangular fixing plate 6.
Example 2:
as shown in fig. 2, a second aspect of the present disclosure provides a multifunctional nondestructive testing sensor, which includes a signal receiving element and a magnetization element, where the signal receiving element includes seven horizontal magnetoresistive elements 7 in the same plane, and is used to implement detection of a magnetic signal in an X direction, three magnetoresistive elements are arranged end to end in a straight line, two magnetoresistive elements are respectively disposed on two sides of the straight line formed by the three magnetoresistive elements, and the magnetoresistive element on each side is uniformly disposed on two sides of a perpendicular bisector of the straight line formed by the three magnetoresistive elements, and forms an included angle of 45 ° with the perpendicular bisector, or may be another included angle within 10 ° to 80 °;
the magnetizing element comprises six exciting coils and yoke plates 12, nylon frameworks 10, magnetic cores 11 and pole shoes 8 which correspond to the exciting coils, the yoke plates 12 are circular yoke plates, the magnetic cores 11 are arranged inside the nylon frameworks 4, one ends of the nylon frameworks 4 are fixed on the yoke plates 12, the other ends of the nylon frameworks 4 are fixed with the pole shoes 8, the six nylon frameworks 4 are uniformly fixed on the upper surfaces of the circular yoke plates, the nylon frameworks 4 are wound with the exciting coils, and the polarities of the two adjacent exciting coils are opposite;
the signal receiving element further comprises a same number of vertical magnetoresistive elements which are perpendicular to the long sides of the horizontal magnetoresistive elements and used for detecting the magnetic signals in the Z direction, and each horizontal magnetoresistive element comprises a corresponding vertical magnetoresistive element.
The signal receiving element is arranged in a space defined by the six excitation coils and fixed on the yoke plate through a fixing piece, the yoke plate 12 is fixed on the support frame 13, and the support frame 13 is used for being fixed with a moving device to realize movement detection on a test piece.
The fixing piece comprises brackets 9 and butterfly-shaped fixing plates 14, wherein each bracket 9 is used for placing a horizontal reluctance element and a vertical reluctance element, the bracket 9 adopts the bracket described in embodiment 1, the bracket 9 is fixed in the butterfly-shaped fixing plate 14, and the butterfly-shaped fixing plate 14 is fixedly connected with a yoke plate 12.
Each excitation coil is formed by winding a plurality of circles of enameled wires with the diameter of 0.23mm on a nylon skeleton, two adjacent excitation coils are wound by the same enameled wire in opposite directions, sinusoidal excitation signals with the phases of 120 degrees are introduced into three groups of coils, each group of coils generates a closed variable magnetic field, and the three groups of magnetic fields are mutually coupled to finally form a rotating magnetic field with the direction changing.
The signal generating and controlling module described in this embodiment synthesizes a three-phase excitation signal by using a DDS principle, and a single chip microcomputer and a DAC control signal parameter, a liquid crystal display, and the like, or generates a three-phase excitation signal by using a dedicated DDS chip, and a person skilled in the art can select the three-phase excitation signal by himself. Under the sine excitation of three different phases, the magnetic field on the surface of the test piece gradually rotates along the anticlockwise direction, when the crack direction and the scanning direction form any angle, the rotating magnetic field can be always vertical to the crack at a certain moment, the sensitivity of magnetic memory or magnetic leakage detection is improved under the condition of weak magnetism, and the limit on the crack direction is broken through.
The magneto-resistive element described in this embodiment is a magneto-resistive element of an HMC1021 model, can measure the magnetic field change in one direction, has high sensitivity, can detect a weak magnetic field on the surface of a workpiece, and has an accurate detection result. The volume of the magnetic resistance element is small, the sensor probe is convenient to manufacture, the volume of the probe is reduced, and a complex non-planar workpiece can be detected. The HMC1021 magnetoresistive element is all solid-state, has low inherent impedance, and has high noise and interference resistance, thereby having high reliability. The HMC1021 magnetoresistive element converts the magnetic signal into a voltage signal for output, and a UA306A acquisition card is selected for analog-to-digital conversion, and those skilled in the art may select other types of acquisition cards according to the sensor structure described in this embodiment.
As shown in FIG. 3, the most commonly used ferromagnetic material 45 steel was used to make the experimental test piece, which had a length of 400mm, a width of 200mm and a thickness of 10 mm.
With the sensor described in this embodiment, cracks in different directions are analyzed based on the rotating magnetic field by magnetic memory detection and magnetic flux leakage detection, and stress is analyzed by magnetic memory detection and barkhausen noise detection.
The excitation frequency is selected to be 4Hz in magnetic memory detection and magnetic leakage detection, the excitation frequency is selected to be 40Hz in Barkhausen noise detection, the magnetic memory detection needs weak magnetic field excitation, the power amplifier output voltage is adjusted to be 2V, the Barkhausen noise detection and magnetic leakage detection adopts a slightly strong magnetic field to improve the detection effect, and the excitation voltage is selected to be 6V.
The method comprises the steps of processing 7 rectangular cracks with different angles on the surface of a test piece through an electric spark engraving machine, wherein the rectangular cracks are respectively 0 degree, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees and 90 degrees, the sizes of the cracks are 40mm in length, 0.5mm in width and 0.5mm in depth, and a stress concentration area is manufactured through a local quenching mode.
The sensor probe is placed on the upper part of the test piece, stress concentration can be easily detected by observing an X-direction magnetic memory detection signal, and the three magnetic resistance elements in a straight line are very sensitive to a stress band on the test piece.
The position and the direction of a stress zone can be distinguished through three horizontal magnetoresistive elements which are in the middle of the stress zone, the larger the included angle between the crack direction and the magnetoresistive elements is, the stronger the X-direction magnetic signal received by the magnetoresistive elements is, the X-direction magnetic signal received by each magnetoresistive element can realize the detection of the position and the direction of the crack, and the preliminary quantitative analysis of the surface of a test piece can be realized subsequently by the detection and the recording of the Z-direction signal.
The signal recording method and the subsequent data processing method described in this embodiment both adopt the existing methods, which is not the innovative point of the present invention, and the content of the above methods is only used for introducing the working principle of the sensor described in this embodiment, and has no limiting effect.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A support for a magnetic resistance element of a nondestructive testing sensor is characterized by comprising a first L template and a second L template which are identical in size, parallel to each other and arranged oppositely, wherein the vertical edges of vertical arms of the first L template and the second L template are flush and are connected through a first rectangular plate, the widths of the vertical arms of the first L template and the second L template are larger than the length of a long side of a rectangular fixing plate of the magnetic resistance element, and the lengths of cross arms of the first L template and the second L template are larger than the thickness of the rectangular fixing plate of the magnetic resistance element;
the transverse edges of the vertical arms of the first L-shaped plate and the second L-shaped plate are flush, the rectangular fixing plate of the first reluctance element is horizontally arranged on the upper sides of the vertical arms of the first L-shaped plate and the second L-shaped plate, the outer edges of the cross arms of the first L-shaped plate and the second L-shaped plate are flush, and the rectangular fixing plate of the second reluctance element is vertically arranged on the upper sides of the cross arms of the first L-shaped plate and the second L-shaped plate.
2. The holder for a magnetoresistive element of a nondestructive inspection sensor according to claim 1, wherein each of the first magnetoresistive element and the second magnetoresistive element is a rectangular element, and long sides of each of the first magnetoresistive element and the second magnetoresistive element are parallel to a short side of the corresponding rectangular fixed plate, and a length of each of the long sides of each of the first magnetoresistive element and the second magnetoresistive element is less than or equal to a length of the short side of the corresponding rectangular fixed plate.
3. The holder for a magnetoresistive element of a nondestructive inspection sensor of claim 1 wherein the first L pattern and the second L pattern have a vertical arm width and a horizontal arm height that are the same.
4. The holder for a magnetoresistive element of a nondestructive inspection sensor of claim 1 wherein the distance between the outer edges of the upper sides of the vertical arms of the first L shaped plate and the second L shaped plate is equal to the length of the short side of the rectangular fixing plate.
5. The holder for a magnetoresistive element of a nondestructive inspection sensor of claim 1 wherein the distance between the outer edges of the upper sides of the cross arms of the first L shaped plate and the second L shaped plate is equal to the length of the short side of the rectangular fixing plate.
6. The holder for a magnetoresistive element of a nondestructive inspection sensor of claim 1 wherein the length of the upper side of the cross arm of the first L-shaped plate and the second L-shaped plate is greater than or equal to the sum of the thicknesses of the second magnetoresistive element and its rectangular fixing plate.
7. A multifunctional nondestructive detection sensor is characterized by comprising a signal receiving element and a magnetization element, wherein the signal receiving element comprises at least seven horizontal magnetoresistive elements which are arranged in the same plane, at least three magnetoresistive elements are arranged in a straight line from head to tail, at least two magnetoresistive elements are respectively arranged on two sides of the straight line formed by the three magnetoresistive elements, and the magnetoresistive elements on each side are uniformly arranged on two sides of a perpendicular bisector of the straight line formed by the three magnetoresistive elements and form a certain included angle with the perpendicular bisector;
the magnetizing element comprises six exciting coils and yoke plates, nylon frameworks, magnetic cores and pole shoes which correspond to the exciting coils, the yoke plates are circular yoke plates, the magnetic cores are arranged in the nylon frameworks, one ends of the nylon frameworks are fixed on the yoke plates, the other ends of the nylon frameworks are fixed with the pole shoes, the six nylon frameworks are uniformly fixed on the upper surfaces of the circular yoke plates, the exciting coils are wound on the nylon frameworks, and two adjacent exciting coils are opposite in polarity and form a group of exciting coils;
the signal receiving element also comprises a same number of vertical magnetoresistive elements which are vertically arranged with the long sides of the horizontal magnetoresistive elements, and each horizontal magnetoresistive element comprises a corresponding vertical magnetoresistive element;
the signal receiving element is arranged in a space defined by six excitation coils and is fixed on a yoke plate through a support of any one of claims 1 to 6, the yoke plate is fixed on a support frame, and the support frame is used for being fixed with a moving device to realize movement detection on a test piece.
8. The nondestructive inspection multifunction sensor of claim 7 comprising seven horizontal magnetoresistive elements, wherein three magnetoresistive elements are arranged end to end in a straight line, two magnetoresistive elements are disposed on either side of the perpendicular bisector, and the long sides of both magnetoresistive elements are at 45 ° angles to the perpendicular bisector.
9. The multifunctional nondestructive inspection sensor of claim 7 wherein each excitation coil is formed by winding a 0.23mm enameled wire on a nylon skeleton for a plurality of turns.
10. The multifunctional nondestructive testing sensor of claim 7 wherein two adjacent excitation coils are wound with the same enameled wire in opposite directions, sinusoidal excitation signals with phases of 120 ° are fed into three groups of coils, each group of coils generates a closed varying magnetic field, and the three groups of magnetic fields are coupled with each other to finally form a rotating magnetic field with varying direction;
or the other end of the nylon framework is fixed with the pole shoe through a screw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921884799.XU CN211122662U (en) | 2019-11-04 | 2019-11-04 | Support for magnetic resistance element of nondestructive testing sensor and sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921884799.XU CN211122662U (en) | 2019-11-04 | 2019-11-04 | Support for magnetic resistance element of nondestructive testing sensor and sensor |
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| CN211122662U true CN211122662U (en) | 2020-07-28 |
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| CN201921884799.XU Expired - Fee Related CN211122662U (en) | 2019-11-04 | 2019-11-04 | Support for magnetic resistance element of nondestructive testing sensor and sensor |
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