Detection tool for bonding magnet field measurement

Abstract

The application relates to a detection tool for bonding magnet magnetic field measurement, which comprises a base plate, a first positioning module and a second positioning module, the first positioning module and the second positioning module are arranged on the base plate, the first positioning module and the second positioning module are arranged at intervals to cooperate to define a detection station, the detection station is used for accommodating a magnet to be measured, an adjustable support is arranged on the base plate, and a Tesla meter is arranged on the adjustable support, and a measurement probe of the Tesla meter is arranged towards the detection station. The detection tool can basically complete automatic measurement operation and reduce the operation difficulty of qualitative quality detection of the magnet to be measured.

Description

Technical Field

[0001] This application relates to the technical field of magnet detection, and in particular to a testing fixture for measuring the magnetic field of bonded magnets. Background Technology

[0002] Bonded magnets are a crucial component of isolators, primarily used to provide a rotating magnetic field for the optical path system, thereby altering the optical path. Typically, a bonded magnet consists of three magnets, each with a different magnetic field direction, resulting in varying surface magnetic fields at different locations on each magnet. To ensure the performance of the bonded magnets, regular inspection is necessary; this involves measuring the strength of the surface magnetic field at specific locations on the magnets to confirm their quality.

[0003] In related technologies, the traditional testing method involves an operator holding a Tesla meter and placing the probe at a specific point on the bonded magnet to read the corresponding magnetic field value. However, this manual measurement method cannot guarantee that the probe is positioned at the same location and angle on the magnet each time. In particular, when changing to magnets of different sizes, even small fluctuations in the measurement position and angle can lead to significant fluctuations in the read magnetic field value, making qualitative quality testing of bonded magnets difficult and resulting in low accuracy. Utility Model Content

[0004] Therefore, it is necessary to provide a testing fixture for measuring the magnetic field of bonded magnets, which addresses the problem that traditional techniques for measuring position and angle fluctuations cause difficulties in qualitative quality inspection and low accuracy of test results.

[0005] This application proposes a testing fixture for measuring the magnetic field of bonded magnets, comprising:

[0006] substrate;

[0007] A first positioning module and a second positioning module are respectively disposed on the substrate, and the first positioning module and the second positioning module are arranged at intervals to define a detection station, the detection station being used to accommodate the magnet to be tested.

[0008] An adjustable bracket is disposed on the substrate;

[0009] A teslameter is mounted on the adjustable bracket, and the measuring probe of the teslameter is oriented toward the detection station.

[0010] This testing fixture is used to measure the magnetic field strength of bonded magnets. In use, the first and second positioning modules are adjusted to preset positions on the substrate according to the specifications of the magnet to be tested. At this point, the first and second positioning modules work together to define the testing station, the size of which is adapted to the size of the magnet. Next, the magnet to be tested is placed into the testing station, and its position is achieved by contact with the first and second positioning modules. Then, a teslameter is mounted on an adjustable bracket, and the bracket is operated to align the teslameter's measuring probe with the testing area of ​​the magnet in the testing station. The surface magnetic field value of the magnet can then be measured using the teslameter. After completing the measurement of the current magnet to be tested, the next magnet to be tested can be moved to the testing station. At this time, the first positioning module and the second positioning module ensure the testing position of the magnet to be tested. The Tesla meter is constrained by the adjustable bracket and can also ensure that the position does not fluctuate. Therefore, it can effectively ensure that the measuring probe can always be accurately aligned with the same testing part on each magnet to be tested, effectively controlling the fluctuation of the measurement position and angle, thereby preventing large fluctuations in the magnetic readings of each magnet to be tested and ensuring the accuracy of the test results. At the same time, compared with the manual measurement method, the testing fixture of this solution can basically complete the automatic measurement operation, reducing the operational difficulty of qualitative quality testing of the magnet to be tested.

[0011] The technical solution of this application will be further described below:

[0012] In one embodiment, the first positioning module and the second positioning module are arranged at an angle on the substrate, and both the first positioning module and the second positioning module include positioning baffles. The two positioning baffles are arranged at an angle and cooperate to form the detection station.

[0013] In one embodiment, the positioning baffle is provided with a contoured surface for abutting against the side of the magnet to be tested located in the testing station, and the contoured surface is used to adapt and fit the side of the magnet to be tested.

[0014] In one embodiment, both the first positioning module and the second positioning module further include a mounting base and an adjustment component. The mounting base is disposed on the substrate, the adjustment component is movably disposed on the mounting base, and the positioning baffle is connected to the adjustment component.

[0015] In one embodiment, the adjusting assembly includes an adjusting screw, the mounting base has a first screw hole, the adjusting screw is screwed into the first screw hole and can reciprocate along its own axis.

[0016] In one embodiment, the adjusting assembly further includes a locking nut screwed onto the adjusting screw. When the locking nut abuts against the mounting base, the locking nut locks the adjusting screw. When the locking nut separates from the mounting base, the locking nut releases the adjusting screw.

[0017] In one embodiment, the adjustment assembly further includes a rotary joint, one end of which is connected to the adjustment screw, and the other end of which is connected to the positioning baffle, such that the positioning baffle can rotate relative to the adjustment screw.

[0018] In one embodiment, the adjustable bracket includes a column and a mounting arm. The column is disposed on the base plate, and the mounting arm is cantilevered on the column for vertical movement. The Tesla meter is disposed on the mounting arm and located above the testing station.

[0019] In one embodiment, a second screw hole is provided at the end of the mounting arm away from the column, and the outer peripheral wall of the Tesla meter is provided with an external thread, which is screwed into the second screw hole.

[0020] In one embodiment, the end of the mounting arm away from the teslameter has a communicating mounting through hole. The end of the mounting arm away from the teslameter includes a first part and a second part. The first part and the second part are spaced apart to form an expansion joint. The expansion joint communicates with the mounting through hole. The first part and the second part are connected by a bolt assembly. The column passes through the mounting through hole. The mounting arm can move up and down and rotate relative to the column. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a testing fixture for measuring the magnetic field of an adhesive magnet according to an embodiment of this application.

[0024] Figure 2 for Figure 1 A structural diagram from a frontal viewpoint.

[0025] Figure 3 for Figure 2 A top-view structural diagram.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Testing fixture for measuring the magnetic field of bonded magnets; 10. Substrate; 20. First positioning module; 30. Second positioning module; 20a. Positioning baffle; 20b. Mounting base; 20c. Adjusting screw; 20d. Locking nut; 40. Testing station; 50. Adjustable bracket; 51. Column; 52. Mounting arm; 521. First part; 522. Second part; 523. Expansion joint; 524. Bolt assembly; 60. Tesla meter; 200. Magnet to be tested. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] See Figures 1 to 3 This application illustrates a testing fixture 100 for measuring the magnetic field of an adhesive magnet, comprising a substrate 10, a first positioning module 20, a second positioning module 30, an adjustable bracket 50, and a teslameter 60.

[0035] The substrate 10 is the basic component of the testing fixture (short for testing fixture 100 for measuring the magnetic field of the bonded magnet, the same below), which serves to load and integrate the first positioning module 20, the second positioning module 30, the adjustable bracket 50 and the teslameter 60. In addition, it is also used to support and position the magnet 200 to be tested during the testing operation.

[0036] The magnet 200 mentioned in this application is a conventional permanent magnet, which can be circular, cylindrical, cuboid, etc., and can be flexibly selected according to actual needs. For example, the magnet 200 used in this application is cuboid in shape, which has a regular shape and is convenient to fit closely with the first positioning module 20 and the second positioning module 30 to achieve positioning.

[0037] Please continue reading. Figure 1 The first positioning module 20 and the second positioning module 30 are respectively disposed on the substrate 10, and the first positioning module 20 and the second positioning module 30 are arranged at intervals to define the detection station 40. The detection station 40 is used to accommodate the magnet 200 to be tested. The adjustable bracket 50 is disposed on the substrate 10. The teslameter 60 is disposed on the adjustable bracket 50, and the measuring probe of the teslameter 60 is used to face the detection station 40.

[0038] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: The testing fixture of this solution is used in the context of measuring the magnetic field strength of bonded magnets. In use, according to the specifications and dimensions of the magnet 200 to be tested, the first positioning module 20 and the second positioning module 30 are adjusted to preset positions on the substrate 10. At this time, the first positioning module 20 and the second positioning module 30 cooperate to define the testing station 40, and the size of the testing station 40 is adapted to the size of the magnet 200 to be tested. Then, the magnet 200 to be tested is placed in the testing station 40, and the magnet 200 to be tested abuts against the first positioning module 20 and the second positioning module 30 to achieve position positioning. After that, the teslameter 60 is installed on the adjustable bracket 50, and the adjustable bracket 50 is operated to make the measuring probe of the teslameter 60 aligned with the testing part of the magnet 200 to be tested in the testing station 40, so that the surface magnetic value of the magnet 200 to be tested can be measured by the teslameter 60.

[0039] After completing the measurement of the current magnet 200, the next magnet 200 can be moved to the testing station 40. At this time, the first positioning module 20 and the second positioning module 30 ensure the testing position of the magnet 200. The Tesla meter 60 is constrained by the adjustable bracket 50, which also ensures that the position does not fluctuate. Therefore, it can effectively ensure that the measuring probe can always be accurately aligned with the same testing part on each magnet 200, effectively controlling the fluctuation of the measurement position and angle, thereby preventing large fluctuations in the magnetic readings of each magnet 200 and ensuring the accuracy of the test results. At the same time, compared with the manual measurement method, the testing fixture of this solution can basically complete the automatic measurement operation, reducing the operational difficulty of qualitative quality testing of the magnet 200.

[0040] In one embodiment, the first positioning module 20 and the second positioning module 30 are arranged at an angle on the substrate 10, and both the first positioning module 20 and the second positioning module 30 include a positioning baffle 20a. The two positioning baffles 20a are arranged at an angle and cooperate to form a detection station 40.

[0041] It is easy to understand that the first positioning module 20 and the second positioning module 30 are arranged at an angle on the substrate 10, so that the first positioning module 20 and the second positioning module 30 are separated by a sufficiently large gap, thereby avoiding mutual obstruction and interference when operating the first positioning module 20 or the second positioning module 30. Furthermore, the two positioning baffles 20a arranged at an angle at this time can easily form the detection station 40, simplifying the formation of the detection station 40. When the magnet to be tested 200 is placed in the detection station 40, the two positioning baffles 20a can simultaneously abut against the two adjacent sides of the magnet to be tested 200, thereby effectively positioning the magnet to be tested 200 and ensuring the installation position accuracy of the magnet to be tested 200 on the substrate 10. This, in turn, ensures that the measuring probe of the teslameter 60 can always be aligned with the same detection area on the magnet to be tested 200.

[0042] Furthermore, the positioning baffle 20a and the magnet 200 under test are in surface contact, with a large and sufficient support area, which can ensure that the positioning baffle 20a has a better positioning effect on the stroke of the magnet 200 under test.

[0043] Considering that different magnets 200 often have different shapes and structures, in order to ensure that the positioning baffle 20a can reliably and effectively position magnets 200 of various shapes, in one embodiment, the positioning baffle 20a is provided with a contoured surface for abutting against the side of the magnet 200 located in the testing station 40. The contoured surface is used to adapt and fit the side of the magnet 200. The contoured surface can closely fit the outer side of the magnet 200 to achieve a good positioning effect.

[0044] Understandably, the positioning baffle 20a should be detachable and replaceable, so that the positioning baffle 20a with a matching contour surface can be flexibly and conveniently replaced according to the different shapes of the magnets 200 to be tested, thereby improving the versatility of the testing fixture.

[0045] Please continue reading. Figures 1 to 3 Furthermore, based on any of the above embodiments, the first positioning module 20 and the second positioning module 30 also include a mounting base 20b and an adjustment component. The mounting base 20b is disposed on the base plate 10, the adjustment component is movably disposed on the mounting base 20b, and the positioning baffle 20a is connected to the adjustment component.

[0046] Mounting base 20b is assembled with base plate 10 for loading adjustment components; the adjustment components are connected to positioning baffle 20a, and the positioning baffle 20a can be moved flexibly on base plate 10 by operating the adjustment components, so that the two positioning baffles 20a can cooperate to form detection stations 40 of different sizes, thereby adapting to accommodate magnets 200 of different specifications and sizes to be tested.

[0047] Specifically, in one embodiment, the adjustment component includes an adjustment screw 20c. A first screw hole is provided on the mounting base 20b. The adjustment screw 20c is screwed into the first screw hole and can reciprocate along its own axis. In use, by rotating the adjustment screw 20c, it can extend and retract along its own axis, thereby causing the two positioning baffles 20a to move closer together or further apart, thus adjusting the size of the inspection station 40. The adjustment structure and method are simple, highly implementable, and help improve inspection efficiency and reduce inspection difficulty.

[0048] Furthermore, based on the above embodiments, the adjustment assembly also includes a locking nut 20d, which is screwed onto the adjusting screw 20c. When the locking nut 20d abuts against the mounting base 20b, it locks the adjusting screw 20c; when it separates from the mounting base 20b, it releases the adjusting screw 20c. During use, after adjusting the positioning block and the position of the adjusting screw 20c according to the specifications of the magnet 200 to be tested, the locking nut 20d is tightened to abut against the mounting base 20b. Utilizing the locking characteristic of the threaded pair between the locking nut 20d and the adjusting screw 20c, loosening or displacement of the adjusting screw 20c can be effectively limited, thereby ensuring the stability of the positioning baffle 20a and ensuring that the positioning baffle 20a effectively and reliably positions the magnet 200 to be tested.

[0049] It should be noted that in this application, the mounting base 20b is an L-shaped plate. The horizontal part is fixed to the base plate 10 by screws, and the vertical part has a first screw hole. Two locking nuts 20d are provided, respectively arranged on opposite sides of the plate thickness direction of the vertical part, and both are screwed onto the adjusting screw 20c. The adjusting screw 20c can be more effectively locked by the two locking nuts 20d simultaneously abutting against the vertical part of the mounting base 20b.

[0050] Furthermore, considering that some magnets 200 under test may have irregular shapes, in order to enhance the applicability of the positioning baffle 20a to the magnets 200 under test, in one embodiment, the adjustment assembly further includes a rotary joint. One end of the rotary joint is connected to the adjustment screw 20c, and the other end of the rotary joint is connected to the positioning baffle 20a, allowing the positioning baffle 20a to rotate relative to the adjustment screw 20c. The rotary joint provides the positioning baffle 20a with rotational freedom, enabling the positioning baffle 20a to adapt to the shape of the magnets 200 under test. Through its self-rotation, the positioning baffle 20a can accurately capture and approach the outer wall of the magnets 200 under test, thereby achieving reliable positioning of the magnets 200 under test.

[0051] For example, the rotary joint can be, but is not limited to, a universal ball joint. This allows the positioning baffle 20a to have 360° rotational freedom, enabling it to be adapted to various shapes of the magnet 200 under test.

[0052] Furthermore, based on any of the above embodiments, the adjustable bracket 50 includes a column 51 and a mounting arm 52. The column 51 is disposed on the base plate 10, and the mounting arm 52 is cantilevered and movable on the column 51. The teslameter 60 is disposed on the mounting arm 52 and located above the detection station 40. The column 51 is vertically mounted on the base plate 10, and the mounting arm 52 is mounted on the column 51 using a cantilever structure, thereby enabling the teslameter 60 to obtain the required mounting height so that the measuring probe of the teslameter 60 is held above the magnet 200 to be tested within the detection station 40, so as to measure the surface magnetic field value of the specified detection location on the magnet 200.

[0053] The column 51 and the base plate 10 can be integrally formed or detachably assembled, depending on the actual needs.

[0054] Furthermore, in another embodiment, a second threaded hole is provided at the end of the mounting arm 52 away from the column 51, and the outer peripheral wall of the teslameter 60 is provided with external threads, which are screwed into the second threaded hole. In this way, by rotating the teslameter 60, the teslameter 60 can be adjusted to move up or down, so as to form an orthogonal relationship between the magnetic fields.

[0055] Please continue reading. Figure 2 Furthermore, in another embodiment, the end of the mounting arm 52 away from the teslameter 60 is provided with a connected mounting through hole. The end of the mounting arm 52 away from the teslameter 60 includes a first part 521 and a second part 522. The first part 521 and the second part 522 are spaced apart to form an expansion joint 523. The expansion joint 523 communicates with the mounting through hole. The first part 521 and the second part 522 are connected by a bolt assembly 524. The column 51 passes through the mounting through hole, and the mounting arm 52 can move up and down and rotate relative to the column 51.

[0056] By inserting the column 51 into the mounting through hole, the height of the mounting arm 52 can be adjusted by sliding the column 51 within the mounting through hole, thereby adjusting the working height of the teslameter 60. Loosening the bolt assembly 524 causes the first part 521 and the second part 522 to move apart, widening the expansion joint 523. This creates a loose fit between the wall of the mounting through hole and the column 51, allowing the mounting arm 52 to be rotated flexibly and effortlessly, thus adjusting the relative angle between the teslameter 60 and the magnet 200 under test. This enables the teslameter 60 to measure specific detection points on the magnet 200. After adjusting the height and angle of the mounting arm 52, tightening the bolt assembly 524 secures the mounting arm 52, ensuring the stability of the position and angle of the teslameter 60.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A testing fixture for measuring the magnetic field of bonded magnets, characterized in that, include: substrate; A first positioning module and a second positioning module are respectively disposed on the substrate, and the first positioning module and the second positioning module are arranged at intervals to define a detection station, the detection station being used to accommodate the magnet to be tested. An adjustable bracket is disposed on the substrate; A teslameter is mounted on the adjustable bracket, and the measuring probe of the teslameter is oriented toward the detection station.

2. The testing fixture for measuring the magnetic field of bonded magnets according to claim 1, characterized in that, The first positioning module and the second positioning module are arranged at an angle on the substrate, and both the first positioning module and the second positioning module include positioning baffles. The two positioning baffles are arranged at an angle and cooperate to form the detection station.

3. The testing fixture for measuring the magnetic field of bonded magnets according to claim 2, characterized in that, The positioning baffle is used to abut against the side of the magnet to be tested located in the testing station. The side of the magnet to be tested is provided with a contoured surface, which is used to adapt and fit the side of the magnet to be tested.

4. The testing fixture for measuring the magnetic field of bonded magnets according to claim 2, characterized in that, Both the first positioning module and the second positioning module include a mounting base and an adjustment component. The mounting base is disposed on the base plate, the adjustment component is movably disposed on the mounting base, and the positioning baffle is connected to the adjustment component.

5. The testing fixture for measuring the magnetic field of bonded magnets according to claim 4, characterized in that, The adjustment assembly includes an adjustment screw, and the mounting base has a first screw hole. The adjustment screw is screwed into the first screw hole and can reciprocate along its own axis.

6. The testing fixture for measuring the magnetic field of bonded magnets according to claim 5, characterized in that, The adjusting assembly also includes a locking nut, which is screwed onto the adjusting screw. When the locking nut abuts against the mounting base, the locking nut locks the adjusting screw. When the locking nut separates from the mounting base, the locking nut releases the adjusting screw.

7. The testing fixture for measuring the magnetic field of bonded magnets according to claim 5, characterized in that, The adjustment assembly further includes a rotary joint, one end of which is connected to the adjustment screw, and the other end of which is connected to the positioning baffle, so that the positioning baffle can rotate relative to the adjustment screw.

8. The testing fixture for measuring the magnetic field of bonded magnets according to claim 1, characterized in that, The adjustable bracket includes a column and a mounting arm. The column is disposed on the base plate, and the mounting arm is cantilevered on the column in a height-reducing and movable manner. The Tesla meter is disposed on the mounting arm and located above the testing station.

9. The testing fixture for measuring the magnetic field of bonded magnets according to claim 8, characterized in that, The mounting arm has a second screw hole at one end away from the column, and the outer peripheral wall of the teslameter has an external thread, which is screwed into the second screw hole.

10. The testing fixture for measuring the magnetic field of bonded magnets according to claim 8, characterized in that, The mounting arm has a through-hole at one end away from the teslameter. The end of the mounting arm away from the teslameter includes a first part and a second part. The first part and the second part are spaced apart to form an expansion joint. The expansion joint communicates with the through-hole. The first part and the second part are connected by a bolt assembly. The column passes through the through-hole. The mounting arm can move up and down and rotate relative to the column.

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