Sensor performance test fixture

Abstract

The application discloses a sensor performance test fixture, which comprises a first support, a second support for winding a sensing coil of a sensor, a third support for fixing an excitation coil and a magnetic core of the sensor, the excitation coil being wound on the magnetic core, two ends of the first support are respectively provided with two second supports in a first direction, the first support is provided with a first fixing position for detachably fixing the second support, the first support is provided with at least three first fixing positions in the first direction, and a first preset distance is formed between two adjacent first fixing positions, the first support is provided with a second fixing position for detachably fixing the third support, and the second fixing position is provided with at least two second fixing positions in a second direction, and a second preset distance is formed between two adjacent second fixing positions. The sensor performance test fixture can change the parameters of the sensor in the sensor performance test, and the performance test efficiency and the performance test precision are improved.

Description

Technical Field

[0001] This application relates to the technical field, and more specifically, to a sensor performance testing fixture. Background Technology

[0002] Axle counting equipment is the mainstream section detection equipment in urban rail transit systems, used to detect the occupancy or vacancy status of track sections. Axle sensors, as the wheel detection devices in axle counting equipment, play a crucial role. With the rapid development of railway technology, various rail transit modes have emerged, such as straddle-type monorails, rubber-tired rail, intercity railways, maglev trains, and light rail. This has placed higher demands on the performance indicators of axle counting sensors, requiring the development of new, specially designed axle counting sensors for specific application environments.

[0003] In the process of designing a new type of axle counting sensor, the performance testing of the axle counting sensor is a continuous iterative process. If the performance does not meet the requirements, the parameters of the axle counting sensor need to be changed multiple times in order to meet the requirements.

[0004] Currently, the parameters of the axle counter sensor are mainly adjusted manually. The axle counter sensor consists of two induction coils and an excitation coil with a magnetic core. The two induction coils are symmetrically distributed at both ends of the magnetic core in a certain spatial position. Specifically, the diameter and number of turns of the induction coils are manually changed, and the induction coils and the excitation coil with the magnetic core are manually moved to adjust the spatial relationship between the two induction coils, the induction coils and the excitation coil, and the magnetic core.

[0005] However, it is difficult to accurately locate the spatial relationship between the two induction coils, the induction coil, the excitation coil, and the magnetic core by manually moving the induction coil and the excitation coil directly. This results in low performance testing efficiency and low performance testing accuracy of the axis counting sensor.

[0006] In addition, manually changing the diameter and number of turns of the induction coil makes it difficult to ensure the consistency of the winding coil, resulting in lower performance testing accuracy and efficiency of the axle counter sensor.

[0007] The same problem exists for other sensors that include induction coils, magnetic cores, and excitation coils.

[0008] In summary, how to modify sensor parameters during sensor performance testing to improve testing efficiency and accuracy is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0009] In view of this, the purpose of this application is to provide a sensor performance testing fixture that can change the parameters of the sensor during sensor performance testing, so as to improve the efficiency and accuracy of performance testing.

[0010] To achieve the above object, the present application provides the following technical solutions:

[0011] A sensor performance test fixture, comprising:

[0012] a first support, a second support for winding of an inductive coil of a sensor, a third support for fixing an excitation coil and a magnetic core of the sensor, the excitation coil being wound on the magnetic core;

[0013] wherein, in a first direction, one end of the first support is used to set one of the second supports, and the other end of the first support is used to set another of the second supports; the first support has a first fixing position for detachably fixing the second support; in the first direction, the first fixing position is at least three and has a first preset distance between adjacent two of the first fixing positions; fixing the second support to different first fixing positions in the first direction can adjust the position of the second support in the first direction; the first direction is perpendicular to the axial direction of the second support;

[0014] the first support has a second fixing position for detachably fixing the third support; in a second direction, the second fixing position is at least two and has a second preset distance between adjacent two of the second fixing positions; fixing the third support to different second fixing positions in the second direction can adjust the position of the third support in the second direction; the second direction is parallel to the axial direction of the second support.

[0015] Optionally, the sensor performance test fixture further comprises an inductive coil winding auxiliary member, one end of the inductive coil winding auxiliary member is detachably fixedly connected with the second support, and the other end of the inductive coil winding auxiliary member is used to be set on a winding machine so that the winding machine winds the inductive coil on the second support.

[0016] Optionally, the fixing structure in the second support for detachably fixedly connecting with the first support can also be detachably fixedly connected with the inductive coil winding auxiliary member.

[0017] Optionally, the first support and the inductive coil winding auxiliary member are both provided with a slot for insertion of the second support, and the slot and the second support are limitingly matched in the second direction and a third direction, the third direction being perpendicular to the second direction and the first direction.

[0018] The second support is used to limit the first support and the induction coil winding auxiliary in the first direction and the second direction through the first fixing part; the first support and the induction coil winding auxiliary are both provided with a first fixing hole, the first fixing hole is located on both sides of the slot, and the first fixing hole on the first support is located at the first fixing position; the second support is provided with a second fixing hole, and the first fixing part is used to pass through the first fixing hole and the second fixing hole.

[0019] Optionally, the second support comprises: a support connecting part used for detachably fixedly connecting with the first support, and an induction coil support column used for winding the induction coil;

[0020] In at least one of the second supports, a third preset distance is provided between a center line of the support connecting part and an axis of the induction coil support column in a third direction; and / or, in at least one of the second supports, the center line of the support connecting part coincides with the axis of the induction coil support column in the third direction.

[0021] The third direction is perpendicular to the first direction and perpendicular to the second direction, and the center line is parallel to the axis of the induction coil support column.

[0022] Optionally, in the case that the third preset distance is provided between the center line of the support connecting part and the axis of the induction coil support column, the second support further comprises a connecting plate fixedly connecting the support connecting part and the induction coil support column, and the support connecting part and the induction coil support column are respectively located on both sides of the connecting plate and at both ends of the connecting plate.

[0023] Optionally, the second support further comprises a through hole penetrating through the induction coil support column along an axial direction of the induction coil support column, and the through hole is used for arranging a magnetic rod.

[0024] And / or, at least one end of the induction coil support column is provided with a limiting part used for limiting the induction coil in the axial direction of the induction coil support column.

[0025] And / or, the diameters of the induction coil support columns of the at least two second supports are different.

[0026] And / or, the heights of the induction coil support columns of the at least two second supports are different.

[0027] Optionally, the first support member has a limiting channel for inserting the third support member, the limiting channel and the third support member are in limiting cooperation in a third direction, the third direction is perpendicular to the first direction and the second direction.

[0028] The third support member is used for limiting cooperation with the first support member in the first direction and the second direction through a second fixing member; the third support member is provided with a third fixing hole, the first support member is provided with a fourth fixing hole, the fourth fixing hole is distributed on both sides of the limiting channel, and the fourth fixing hole is located at the second fixing position; the second fixing member passes through the third fixing hole and the fourth fixing hole.

[0029] Optionally, the first support member comprises a transverse support member and a longitudinal support member which are fixedly connected; wherein the transverse support member extends along the first direction, and the longitudinal support member extends along the second direction; in the first direction, the longitudinal support member is located in the middle of the transverse support member; the first fixing position is distributed on the transverse support member, and the second fixing position is distributed on the longitudinal support member.

[0030] Optionally, the first support member, the second support member and the third support member are all non-metal members.

[0031] In the sensor performance test fixture provided in the application, the two second support members are used for being fixed on the first fixing positions of the first support member, and the third support member is used for being fixed on the second fixing position of the first support member, the second support member is used for winding the induction coil, and the third support member is used for fixing the excitation coil and the magnetic core, so that the installation of the excitation coil, the magnetic core and the two induction coils in the sensor can be realized; moreover, the first fixing position in the first direction is at least three, and there is a first preset distance between two adjacent first fixing positions in the first direction, so that the second support member fixed on different first fixing positions in the first direction can quantitatively adjust the position of the second support member in the first direction; at the same time, the second fixing position in the second direction is at least two, and there is a second preset distance between two adjacent second fixing positions in the second direction, so that the third support member fixed on different second fixing positions in the second direction can quantitatively adjust the position of the third support member in the second direction, so that the distance between the two induction coils in the first direction can be quantitatively adjusted, the distance between the induction coil and the excitation coil in the first direction can be quantitatively adjusted, the distance between the induction coil and the excitation coil in the second direction can be quantitatively adjusted, the adjustment precision is effectively improved, and the performance test precision of the sensor is improved, and the test efficiency of the sensor is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only only the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0033] Figure 1 The explosion schematic diagram of the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0034] Figure 2 The structural schematic diagram of the first support and the third support in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0035] Figure 3 The structural schematic diagram of the third support after placing the excitation coil and the magnetic core in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0036] Figure 4 The structural schematic diagram of the second support in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0037] Figure 5 The structural schematic diagram of the second support after winding the induction coil in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0038] Figure 6 The exploded schematic diagram of the second support and the induction coil winding auxiliary in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0039] Figure 7 The structural schematic diagram of another kind of second support in the sensor performance test fixture provided by the embodiment of the present application is shown in the figure.

[0040] Figure 8 The structural schematic diagram of another direction of the second support is shown in the figure. Figure 7

[0041] Explanation of reference signs:

[0042] ​1 is a first support piece, 11 is a transverse support piece, 12 is a longitudinal support piece, 13 is a slot, 14 is a first fixing hole, 15 is a fourth fixing hole; 2 is a second support piece, 21 is an induction coil support column, 22 is a limiting part, 23 is a support piece connecting part, 231 is a first connecting plate, 232 is a second connecting plate, 24 is a through hole, 25 is a second fixing hole, 251 is a first groove, 252 is a second groove, 26 is a connecting plate; 3 is a third support piece, 4 is a first fixing piece, 5 is a second fixing piece, 6 is an induction coil winding auxiliary piece, 61 is a first auxiliary connecting part, 62 is a second auxiliary connecting part; 7 is an induction coil, 8 is a magnetic core, 9 is an excitation coil, 01 is a first fixing position, 02 is a second fixing position. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing the specific embodiments, and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a", "said", "the above", "the", and "this" are intended to also include, for example, "one or more" such expressions, unless there is clear indication to the contrary in the context. It should also be understood that in the embodiments of the present application, "one or more" means one, two or more than two; "and / or" describes the association relationship of the associated objects, which means that there can be three relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, wherein A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0045] Reference within this specification to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places within specified descriptions are not necessarily all referring to the same embodiment, however, can mean one or more but not all embodiments. The terms "including," "comprising," "featuring," and variations thereof are meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless otherwise noted, the terms "including" and "comprising" are used in their open, conventional sense and are not used in the sense of "consisting only of."

[0046] The plurality referred to in the embodiments of the present application refers to greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms "first", "second", etc. are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0047] The "parallel" and "perpendicular" referred to in the present application are "substantially parallel" and "substantially perpendicular" in actual operation. "Substantially parallel" can be understood as parallel with some error, and similarly, "substantially perpendicular" can be understood as perpendicular with some error.

[0048] For the convenience of understanding, the technical terms involved in the present application will be explained and described below.

[0049] The axle counting sensor adopts the principle of electromagnetic induction to detect whether there is metal material around it. Specifically, the inductor coil induces an electromotive force by the principle of electromagnetic induction, and the axle counting is performed by detecting the dynamic change of the induced electromotive force when the wheel passes. The outstanding feature of the axle counting sensor is that it is independent of other media around it and has good environmental adaptability.

[0050] The excitation coil and the inductor coil are both tightly wound with wires on the coil skeleton to form a cylindrical coil with a certain inductance and resistance.

[0051] The embodiments of the present application provide a sensor performance test fixture, which can quickly and accurately change the parameters of the sensor, improve the accuracy of test results and improve the test efficiency when designing a new type of sensor or optimizing the performance of the sensor.

[0052] As shown in Figure 1 and Figure 2 The sensor performance test fixture provided by the embodiments of the present application comprises a first support 1, a second support 2, and a third support 3.

[0053] As shown in Figure 3As shown, the third support 3 is used to fix the excitation coil 9 and the magnetic core 8 of the sensor, the excitation coil 9 being wound on the magnetic core 8. Exemplarily, the third support 3 is used to fix the excitation coil 9 and the magnetic core 8 by adhesive. Of course, other ways can be selected to fix the excitation coil 9 and the magnetic core 8, which are not limited in the embodiment.

[0054] The specific structure of the third support 3 is selected according to actual conditions. In some embodiments, the third support 3 has a mounting surface for placing and fixing the excitation coil 9 and the magnetic core 8. The third support 3 can be plate-shaped or columnar, which are not limited in the embodiment.

[0055] It should be noted that, Figure 3 In order to show the excitation coil 9 and the magnetic core 8, part of the longitudinal support 12 is hidden.

[0056] As shown, Figure 5 The second support 2 is used for winding the induction coil 7 of the sensor, and the second support is at least two.

[0057] As shown, Figure 1 and Figure 2 In the first direction, one end of the first support 1 is used to set one second support 2, and the other end of the first support 1 is used to set another second support 2; the first support 1 has a first fixing position 01 for detachably fixing the second support 2; in the first direction, the first fixing position 01 is at least three and has a first preset distance between adjacent two first fixing positions 01. In this way, the second support 2 is fixed to different first fixing positions 01 in the first direction, and the position of the second support 2 in the first direction is different, that is, the position of the second support 2 in the first direction can be adjusted by fixing the second support 2 to different first fixing positions 01 in the first direction.

[0058] It should be noted that the first direction is perpendicular to the axial direction of the second support 2, and when the induction coil 7 is wound on the second support 2, the axial direction of the second support 2 is the axial direction of the induction coil 7. The specific value of the first preset distance is selected according to actual conditions, which is not limited in the embodiment.

[0059] The first support 1 has a second fixing position 02 for detachably fixing the third support 3; in the second direction, the second fixing position 02 is at least two and has a second preset distance between adjacent two second fixing positions 02. In this way, the third support 3 is fixed to different second fixing positions 02 in the second direction, and the position of the third support 3 in the second direction is different, that is, the position of the third support 3 in the second direction can be adjusted by fixing the third support 3 to different second fixing positions 02 in the second direction.

[0060] It should be noted that the second direction is parallel to the axial direction of the second support 2. When the excitation coil 9 with the magnetic core 8 is fixed on the third support 3, and the third support 3 is fixed on the first support 1, the first direction is parallel to the axial direction of the magnetic core 8, that is, parallel to the axial direction of the excitation coil 9. The specific value of the second preset distance is selected according to the actual situation, and the embodiment does not limit it.

[0061] The use method of the above sensor performance test fixture is as follows:

[0062] The two induction coils 7 are wound on the two second supports 2, and then the two second supports 2 are fixed at the two first fixing positions 01 of the first support 1, respectively, and the two second supports 2 are distributed in the first direction in sequence; the excitation coil 9 with the magnetic core 8 is fixed on the third support 3, and then the third support 3 is detachably fixed at the second fixing position 02 of the first support 1, so that the performance of the sensor including the above induction coil 7, the magnetic core 8 and the excitation coil 9 can be tested. During the test, the second support 2 is fixed at different first fixing positions 01 in the first direction, so that the position of the second support 2 in the first direction can be adjusted; the third support 3 is fixed at different second fixing positions 02 in the second direction, so that the position of the third support 3 in the second direction can be adjusted, thereby adjusting the position of the induction coil 7 in the first direction, and the position of the excitation coil 9 and the magnetic core 8 in the first direction, to meet the test requirements.

[0063] In the above sensor performance test fixture, the first preset distance is provided between the two first fixing positions 01 adjacent in the first direction, so that the position of the second support 2 in the first direction can be quantitatively adjusted; the second preset distance is provided between the two second fixing positions 02 adjacent in the second direction, so that the position of the third support 3 in the second direction can be quantitatively adjusted, so that the distance between the two induction coils 7 in the first direction can be quantitatively adjusted, the distance between the induction coil 7 and the excitation coil 9 and the magnetic core 8 in the first direction can be quantitatively adjusted, and the distance between the induction coil 7 and the excitation coil 9 and the magnetic core 8 in the second direction can be quantitatively adjusted, thereby effectively improving the adjustment accuracy, and improving the performance test accuracy of the sensor and the test efficiency of the sensor.

[0064] The above sensor can be a shaft counting sensor, or other sensors including the induction coil 7, the excitation coil 9 and the magnetic core 8, and the embodiment does not limit the type of sensor to which the above sensor performance test fixture is applied.

[0065] In the case that the detection object of the sensor is a metal piece, for example, the detection object of the sensor is a wheel, and the wheel is a metal piece, in order to avoid the influence of the sensor performance test fixture on the detection result of the sensor, the first support 1, the second support 2 and the third support 3 can be selected to be non-metal pieces. For example, the first support 1, the second support 2 and the third support 3 are all plastic pieces or wooden pieces, and the like, which are not limited in the embodiment.

[0066] As shown in Figure 6 In some embodiments, the sensor performance test fixture further comprises an inductive coil winding auxiliary piece 6, one end of the inductive coil winding auxiliary piece 6 is detachably fixedly connected with the second support 2, and the other end of the inductive coil winding auxiliary piece 6 is arranged on the winding machine so that the winding machine winds the inductive coil 7 on the second support 2.

[0067] In this case, in the case that the detection object of the sensor is a metal piece, in order to avoid the influence of the sensor performance test fixture on the detection result of the sensor, the inductive coil winding auxiliary piece 6 can be selected to be a non-metal piece. The specific material of the inductive coil winding auxiliary piece 6 is selected according to the actual situation, which is not limited in the embodiment.

[0068] The specific structure of the inductive coil winding auxiliary piece 6 is selected according to the actual situation. In some embodiments, the inductive coil winding auxiliary piece 6 comprises a first auxiliary connecting part 61 and a second auxiliary connecting part 62 which are fixedly connected, wherein the first auxiliary connecting part 61 is arranged on the winding machine, and the second auxiliary connecting part 62 is detachably fixedly connected with the second support 2.

[0069] In the above-mentioned sensor performance test fixture, the second support 2 needs to be detachably fixedly connected with the first support 1 and the inductive coil winding auxiliary piece 6. In order to simplify the structure of the second support 2, the fixing structure of the second support 2 for detachable fixed connection with the first support 1 can also be detachably fixedly connected with the inductive coil winding auxiliary piece 6.

[0070] It can be understood that the fixing structure of the first support 1 and the second support 2 is the same as the fixing structure of the inductive coil winding auxiliary piece 6 and the second support 2.

[0071] There are various structures for the fixing structure of the first support 1 and the second support 2, and the fixing structure of the inductor winding auxiliary 6 and the second support 2, which are selected according to actual conditions. In some embodiments, the first support 1 and the inductor winding auxiliary 6 are both provided with a slot 13 for inserting the second support 2, and the slot 13 and the second support 2 are limitedly matched in the second direction and the third direction, and the third direction is perpendicular to the first direction and the second direction; the second support 2 is limited to the first support 1 and the inductor winding auxiliary 6 in the first direction and the second direction by the first fixing member 4; the first support 1 and the inductor winding auxiliary 6 are both provided with a first fixing hole 14, and the first fixing hole 14 is located on both sides of the slot 13.

[0072] It can be understood that the two sides of the slot 13 are sequentially distributed along the third direction; the position of the first fixing hole 14 on the first support 1 is a first fixing position 01; the second support 2 is provided with a second fixing hole 25, and the first fixing member 4 is used to pass through the first fixing hole 14 and the second fixing hole 25. In the first direction, the first fixing hole 14 is at least three; in the first direction, there is a first preset distance between the two adjacent first fixing holes 14. The first fixing hole 14 and the second fixing hole 25 are detachably matched with the first fixing member 4. The second support 2 and the slot 13 are detachably matched. The first fixing member 4 extends along the third direction, that is, the length direction of the first fixing member 4 is the third direction.

[0073] In order to simplify the structure, the second fixing hole 25 on the second support 2 is one, and the first fixing member 4 is one. In this way, the first fixing member 4 sequentially passes through one first fixing hole 14, one second fixing hole 25, and another first fixing hole 14, and the two first fixing holes 14 through which the first fixing member 4 passes are oppositely arranged and located at the same position in the first direction.

[0074] In the above structure, the second support 2 is used to be detachably limitedly matched with the first support 1 in the first direction, the second direction and the third direction, so as to realize that the second support 2 is used to be detachably fixedly connected with the first support 1; correspondingly, the second support 2 is used to be detachably limitedly matched with the inductor winding auxiliary 6 in the first direction, the second direction and the third direction, so as to realize that the second support 2 is used to be detachably fixedly connected with the inductor winding auxiliary 6.

[0075] In the above structure, in order to facilitate the limited matching of the slot 13 and the second support 2 in the second direction and the third direction, the above slot 13 can be a T-shaped slot or a dovetail slot, etc.

[0076] As shown in Figure 2 and Figure 3 , the slot 13 is a T-shaped slot. In this case, the second support 2 has a structure matched with the T-shaped slot.

[0077] In the case that the detection object of the sensor is a metal piece, in order to avoid the sensor performance test fixture affecting the detection result of the sensor, the first fixing piece 4 can be selected as a non-metal piece.

[0078] In actual cases, the second support piece 2 and the first support piece 1 can also be detachably fixed and connected through other structures, and the second support piece 2 and the inductive coil winding auxiliary piece 6 can also be detachably fixed and connected through other structures, and are not limited to the above embodiments.

[0079] In the above sensor performance test fixture, the specific structure of the second support piece 2 is selected according to actual conditions. For example, Figure 4 and Figure 5 In some embodiments, the second support piece 2 includes a support piece connecting part 23 for detachable fixed connection with the first support piece 1, and an inductive coil support column 21 for winding the inductive coil 7. In this case, the fixing structure in the support piece connecting part 23 for detachable fixed connection with the first support piece 1 can be selected to be detachably fixed and connected with the inductive coil winding auxiliary piece 6.

[0080] In the case that the first support piece 1 has a slot 13, and the slot 13 is a T-shaped slot, the support piece connecting part 23 includes a first connecting plate 231 and a second connecting plate 232 fixedly connected, and the second connecting plate 232 is perpendicular to the first connecting plate 231, the second connecting plate 232 is located in the middle of the first connecting plate 231 in the third direction, and the second connecting plate 232 is located between the first connecting plate 231 and the inductive coil support column 21.

[0081] In the above structure, the first connecting plate 231 and the second connecting plate 232 are matched with the T-shaped slot to realize the limiting in the second direction and the third direction.

[0082] In the above structure, in the case that the second support piece 2 has a second fixing hole, the second fixing hole is arranged on the first connecting plate 231 and the second connecting plate 232. Specifically, the first connecting plate 231 has a first recess 251, and the second connecting plate 232 has a second recess 252, and the first recess 251 and the second recess 252 are butted to form the above-mentioned second fixing hole.

[0083] In the above embodiments, as shown in Figure 7 and Figure 8 In at least one second support piece 2, in the third direction, the center line of the support piece connecting part 23 and the axis of the inductive coil support column 21 have a third preset distance; and / or, as shown in Figure 4 and Figure 5As shown in FIG. 1 and FIG. 2, the center line of the support connecting part 23 and the axis of the inductive coil support column 21 coincide in the third direction in the at least one second support 2; wherein the center line is parallel to the axis of the inductive coil support column 21.

[0084] In the above embodiment, the at least one second support 2 is preferably the second support a, in which the second support a has a third preset distance between the center line of the support connecting part 23 and the axis of the inductive coil support column 21 in the third direction; and the at least one second support 2 is the second support b, in which the second support b has the center line of the support connecting part 23 and the axis of the inductive coil support column 21 coincide in the third direction. In this way, the second support a is replaced by the second support b, or the second support b is replaced by the second support a, which can change the distance between the two inductive coils 7 in the third direction, and the distance between the inductive coil 7 and the excitation coil 9, increase the adjustable parameters, and realize the adjustment of all distance parameters in three-dimensional direction, further improve the test accuracy of the sensor.

[0085] In the above embodiment, in the case of having a third preset distance between the center line of the support connecting part 23 and the axis of the inductive coil support column 21, as shown in Figure 7 and Figure 8 As shown in FIG. 1 and FIG. 2, the second support 2 further comprises a connecting plate 26 fixedly connecting the support connecting part 23 and the inductive coil support column 21, and the support connecting part 23 and the inductive coil support column 21 are respectively located on both sides of the connecting plate 26 and at both ends of the connecting plate 26.

[0086] In some embodiments, the above-mentioned second support 2 further comprises a through hole 24, which penetrates the inductive coil support column 21 along the axial direction of the inductive coil support column 21, and the through hole 24 is used to set a magnetic rod. In this way, the magnetic field of the inductive coil 7 can be restrained in the inner circumference of the inductive coil 7 by the magnetic rod, which improves the test accuracy.

[0087] In some embodiments, at least one end of the inductive coil support column 21 has a limiting part 22 for limiting the inductive coil 7 in the axial direction of the inductive coil support column 21. In order to avoid affecting the insertion of the support connecting part 23 and the first support 1, the limiting part 22 can be located at the end of the inductive coil support column 21 away from the support connecting part 23.

[0088] In some embodiments, in order to facilitate the adjustment of the diameter and the number of turns of the induction coil 7, the diameters of the induction coil support columns 21 of the at least two second supports 2 are different; and / or, the heights of the induction coil support columns 21 of the at least two second supports 2 are different. In this way, when it is necessary to adjust the diameter or the number of turns of the induction coil 7, the induction coil 7 can be wound on the corresponding second support 2, so as to facilitate the consistency of the coil winding and improve the performance test accuracy of the sensor.

[0089] It should be noted that when the two induction coils 7 of the sensor are completely the same, the diameters and the heights of the induction coil support columns 21 of the at least two second supports 2 need to be selected to be the same.

[0090] For the fixing structure of the third support 3 and the first support 1 in the above-mentioned sensor performance test fixture, selection is made according to the actual situation. In some embodiments, the first support 1 has a limiting channel for inserting the third support 3, the limiting channel and the third support 3 are limitingly matched in the third direction, the third direction is perpendicular to the first direction and the second direction; the third support 3 is used for limitingly matching with the first support 1 in the first direction and the second direction through the second fixing member 5; the third support 3 is provided with a third fixing hole, the first support 1 is provided with a fourth fixing hole 15, the fourth fixing hole 15 is distributed on both sides of the limiting channel, and the position where the fourth fixing hole 15 is located is the second fixing position 02; the second fixing member 5 passes through the third fixing hole and the fourth fixing hole 15.

[0091] It can be understood that the length direction of the second fixing member 5 is the third direction, in order to simplify the structure, one second fixing member 5 and one third fixing hole can be selected, and each second fixing member 5 passes through two fourth fixing holes 15 and one third fixing hole which are opposite in the third direction. The third support 3 and the limiting channel are detachably limitingly matched, and the second fixing member 5 is detachably passed through the third fixing hole and the fourth fixing hole 15.

[0092] In the above-mentioned structure, the third support 3 and the first support 1 are detachably limitingly matched in the first direction, the second direction and the third direction, so as to realize the detachable fixed connection of the third support 3 and the first support 1.

[0093] In the above-mentioned structure, by fixing the third support 3 at different fourth fixing holes 15 in the second direction, the position of the third support 3 in the second direction can be adjusted.

[0094] In order to facilitate the formation of the above-mentioned limiting channel, the above-mentioned first support can include two longitudinal supports 12, the two longitudinal supports 12 are sequentially distributed along the third direction, and the two longitudinal supports 12 have a gap therebetween, and the gap forms the above-mentioned limiting channel. In this case, the above-mentioned fourth fixing hole 15 is arranged on the two longitudinal supports 12.

[0095] In order to improve the limiting effect, the longitudinal support 12 can be in a plate structure. Of course, the longitudinal support 12 can also be in other structures, which are not limited in the embodiment.

[0096] In the case that the detection object of the sensor is a metal part, in order to avoid the sensor performance test fixture affecting the detection result of the sensor, the second fixing part 5 can be a non-metal part.

[0097] The specific structure of the first support 1 in the sensor performance test fixture is selected according to the actual situation. In some embodiments, the first support 1 includes a fixedly connected transverse support 11 and a longitudinal support 12; the transverse support 11 extends in a first direction, and the longitudinal support 12 extends in a second direction; in the first direction, the longitudinal support 12 is located in the middle of the transverse support 11; the first fixing position 01 is located on the transverse support 11, and the second fixing position 02 is located on the longitudinal support 12.

[0098] It can be understood that the transverse support 11 is used for detachable fixed connection with the second support 2, and the longitudinal support 12 is used for detachable fixed connection with the third support 3. The transverse support and the longitudinal support are arranged perpendicularly.

[0099] In the case that the first support 1 has a slot 13 and a first fixing hole 14, the slot 13 and the first fixing hole 14 are arranged on the transverse support 11; in the case that the first support 1 has a fourth fixing hole 15, the fourth fixing hole 15 is arranged on the longitudinal support 12.

[0100] The use method of the sensor performance test fixture is as follows: first, the second support 2 (induction coil skeleton) is fixed on the winding machine by using the induction coil winding auxiliary part 6, and then the induction coil 7 is wound; after winding, the second support 2 is taken off from the induction coil winding auxiliary part 6, and then the second support 2 is inserted into the slot of the first support 1, and the second support 2 is fixed at the specified first fixing position 01 by the first fixing part 4; then the excitation coil 9 is wound on the magnetic core 8, and the excitation coil 9 with the magnetic core 8 is fixed on the third support 3; the third support 3 is fixed at the specified second fixing position 02 by the second fixing part 5; the lead-out wires of the two induction coils 7 and the lead-out wire of the excitation coil 9 are welded on the printed circuit board (PCB). Thus, the performance test of the sensor can be carried out, and by analyzing the change curve of the induced electromotive force of the induction coil 7 when the horizontal distance between the wheel and the induction coil 7 changes, the parameters of the sensor can be optimized, and thus the performance of the sensor is improved.

[0101] When the position of the induction coil 7 in the first direction needs to be adjusted, the first fixing member 4 is pulled out from the first fixing hole 14 and the second fixing hole, then the second supporting member 2 is moved to the required first fixing position 01, and then the first fixing member 4 is inserted into the corresponding first fixing hole 14 and the second fixing hole; when the position of the excitation coil 9 and the magnetic core 8 in the second direction needs to be adjusted, the second fixing member 5 is pulled out from the third fixing hole and the fourth fixing hole 15, then the third supporting member 3 is moved to the required second fixing position 02, and then the second fixing member 5 is inserted into the corresponding third fixing hole and the fourth fixing hole 15; when the position of the induction coil 7 in the third direction needs to be adjusted, the first fixing member 4 is pulled out from the first fixing hole 14 and the second fixing hole, then the second supporting member 2 is removed, the second supporting member 2 with the induction coil 7 wound thereon is replaced, the replaced second supporting member 2 is moved to the required first fixing position 01, and then the first fixing member 4 is inserted into the corresponding first fixing hole 14 and the second fixing hole.

[0102] The above description of disclosed embodiments enables one skilled in the art to make or use the application. Numerous modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sensor performance test fixture, characterized by, The sensor performance test fixture comprises: a first support; a second support for winding an induction coil of a sensor; a third support for fixing an excitation coil and a magnetic core of the sensor, the excitation coil being wound on the magnetic core; wherein, in a first direction, one end of the first support is used to arrange one of the second supports, and the other end of the first support is used to arrange another of the second supports; the first support has a first fixing position for detachably fixing the second support; in the first direction, the first fixing position is at least three, and the first preset distance is provided between two adjacent first fixing positions; the position of the second support in the first direction can be adjusted by fixing the second support to different first fixing positions in the first direction; the first direction is perpendicular to the axial direction of the second support; 2. The sensor performance test fixture of claim 1, wherein, the first support has a second fixing position for detachably fixing the third support; in a second direction, the second fixing position is at least two, and a second preset distance is provided between two adjacent second fixing positions; the position of the third support in the second direction can be adjusted by fixing the third support to different second fixing positions in the second direction; the second direction is parallel to the axial direction of the second support.

3. The sensor performance test fixture of claim 2, wherein, The sensor performance test fixture further comprises an induction coil winding auxiliary part, one end of the induction coil winding auxiliary part is detachably fixedly connected with the second support, and the other end of the induction coil winding auxiliary part is arranged on a winding machine to enable the winding machine to wind the induction coil on the second support. The fixing structure of the second support for detachably fixedly connecting with the first support can also detachably fixedly connect with the induction coil winding auxiliary part.

4. The sensor performance test fixture according to claim 3, wherein the first support and the induction coil winding auxiliary part are both provided with a slot for inserting the second support, and the slot and the second support are limitedly matched in the second direction and a third direction, the third direction being perpendicular to the second direction and the first direction; the second support is limited in the first support and the induction coil winding auxiliary part in the first direction and the second direction by a first fixing part; the first support and the induction coil winding auxiliary part are both provided with a first fixing hole, the first fixing hole being located on both sides of the slot, and the position of the first fixing hole on the first support is the first fixing position; the second support is provided with a second fixing hole, and the first fixing part is used to pass through the first fixing hole and the second fixing hole.

5. The sensor performance test fixture according to claim 1, wherein the second support comprises a support connecting part for detachably fixedly connecting with the first support, and an induction coil support column for winding the induction coil. In at least one of the second supports, a third preset distance exists between a center line of the support connecting part and an axis of the inductive coil support column in a third direction; and / or, in at least one of the second supports, the center line of the support connecting part coincides with the axis of the inductive coil support column in the third direction. The third direction is perpendicular to the first direction and perpendicular to the second direction, and the center line is parallel to the axis of the inductive coil support column.

6. The sensor performance test card of claim 5, wherein, In the case where the third preset distance exists between the center line of the support connecting part and the axis of the inductive coil support column, the second support further comprises a connecting plate fixedly connecting the support connecting part and the inductive coil support column, and the support connecting part and the inductive coil support column are respectively located at two sides of the connecting plate and at two ends of the connecting plate.

7. The sensor performance test fixture of claim 5, wherein: The second support further comprises a through hole penetrating through the inductive coil support column along an axial direction of the inductive coil support column, and the through hole is used for arranging a magnetic rod. And / or, at least one end of the inductive coil support column is provided with a limiting part for limiting the inductive coil in the axial direction of the inductive coil support column. And / or, the diameters of the inductive coil support columns of the at least two second supports are different. And / or, the heights of the inductive coil support columns of the at least two second supports are different.

8. The sensor performance test fixture of claim 1, wherein: The first support is provided with a limiting channel for inserting the third support, and the limiting channel and the third support are limitedly matched in a third direction perpendicular to the first direction and the second direction. The third support is used for being limitedly matched with the first support in the first direction and the second direction by a second fixing member, the third support is provided with a third fixing hole, the first support is provided with a fourth fixing hole, the fourth fixing hole is distributed on both sides of the limiting channel, the fourth fixing hole is located at the second fixing position, and the second fixing member penetrates through the third fixing hole and the fourth fixing hole.

9. The sensor performance test card of claim 1, wherein, The first support comprises a transverse support and a longitudinal support fixedly connected, the transverse support extends in the first direction, the longitudinal support extends in the second direction, in the first direction, the longitudinal support is located at a middle part of the transverse support, the first fixing position is distributed on the transverse support, and the second fixing position is distributed on the longitudinal support.

10. The sensor performance test card of any one of claims 1-9, wherein, The first support, the second support and the third support are all non-metal members.

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