Device and method for detecting sensitivity of receiving coil based on electromagnetic positioning scenario

Abstract

The present invention belongs to the technical field of magnetic positioning systems, and discloses a device and method for detecting the sensitivity of a receiving coil based on an electromagnetic positioning scenario, wherein the device for detecting the sensitivity of a receiving coil based on an electromagnetic positioning scenario comprises a magnetic field transmitting coil, a winding drum, and a fixing device; the magnetic field transmitting coil is wound on the winding drum counterclockwise or clockwise along the geometric center of the winding drum; a hollow chamber with openings at both ends is provided in the winding drum, the fixing device is provided in the hollow chamber, and is snap-connected with the winding drum; the fixing device is used to install a receiving coil that receives the magnetic field signal of the magnetic field transmitting coil and generates a corresponding electromotive force. The present invention can adapt to different magnetic field strengths and operating frequencies, improves the applicability of the device in detecting the sensitivity of the receiving coil, ensures the accuracy of sensitivity detection, and ensures the reliability of the detection results.

Description

Technical Field

[0001] The present invention relates to the technical field of non-magnetic positioning systems, and particularly relates to a device and method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario. Background Art

[0002] In the prior art, general electromagnetic field and signal analysis devices such as spectrum analyzers and LabSat (Laboratory Satellite) test systems are usually used to measure the sensitivity of coils. However, in electromagnetic positioning technology, when using coils as sensors and detecting the sensitivity of receiving coils in an electromagnetic positioning scenario through general devices such as spectrum analyzers and LabSat test systems, due to the limitations of the coil in terms of process and material problems, even coils of the same model often have differences in sensitivity. As a result, the above general devices cannot support the specific frequencies or frequency ranges required in the electromagnetic positioning scenario, leading to the inability to accurately measure the sensitivity of the receiving coil at different operating frequencies. Moreover, there are various interference sources in the electromagnetic positioning scenario, and the above general devices do not have sufficient anti-interference capabilities, thus affecting the accuracy and reliability of the system signals. Summary of the Invention

[0003] The main purpose of this application is to provide a device and method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, aiming to solve the technical problem that existing general detection devices cannot detect the sensitivity of receiving coils in an electromagnetic positioning scenario.

[0004] To achieve the above purpose, the present invention proposes a device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, including a magnetic field emitting coil, a winding cylinder, and a fixing device;

[0005] The magnetic field emitting coil is wound around the winding cylinder counterclockwise or clockwise along the geometric center of the winding cylinder;

[0006] A hollow chamber with both ends open is provided inside the winding cylinder, and the fixing device is arranged inside the hollow chamber and is snap-connected to the winding cylinder;

[0007] The fixing device is used to install a receiving coil that receives the magnetic field signal of the magnetic field emitting coil and generates a corresponding electromotive force.

[0008] Further, the winding cylinder includes a cylinder body and limiting baffles. There are two limiting baffles, which are respectively arranged at both ends of the cylinder body. The cylinder body is recessed inward by a specified distance towards the direction close to the hollow chamber, so that a support platform for placing the magnetic field emitting coil is formed at the connection between the cylinder body and the limiting baffles.

[0009] Further, when the magnetic field emitting coil is wound around the cylinder body, cutting planes are provided on the first-end coil and the last-end coil of the magnetic field emitting coil, and the cutting planes are located on the side of the magnetic field emitting coil close to the limiting baffle and are attached to the support platform.

[0010] Further, the cutting planes extend along the circumferential direction of the cylinder body, and the extension length is greater than or equal to half of the circumference of the cylinder body and less than or equal to three-quarters of the circumference of the cylinder body, and the cutting depth of the cutting planes gradually decreases inward from the first end and / or the last end of the magnetic field emitting coil.

[0011] Further, the fixing device includes a fixing plate and a buckle member connected to the fixing plate. The fixing plate is attached to the limiting baffle, the buckle member is located in the hollow chamber, and is in interference fit with the inner wall of the hollow chamber.

[0012] Further, the buckle member includes a first buckle portion and a second buckle portion. The first buckle portion is connected to the fixing plate, and one end of the first buckle portion away from the fixing plate is recessed inward. The second buckle portion is connected to the inner concave portion at one end of the first buckle portion away from the fixing plate.

[0013] Further, the second buckle portion includes a connecting portion connected to the first buckle portion and a buckle portion connected to one end of the connecting portion away from the first buckle portion. A plurality of grooves are provided at intervals on the buckle portion, and a convex elastic round head is provided at one end of the buckle portion away from the connecting portion. When the elastic round head is in interference fit with the inner wall of the hollow chamber with the first buckle portion, a specified gap is formed between a part of the buckle portion and the connecting portion and the inner wall of the hollow chamber.

[0014] Further, a receiving groove is provided in the fixing device. The receiving groove includes a cylindrical portion and a conical portion. The cylindrical portion is located at one end close to the fixing plate, the conical portion is provided at one end of the cylindrical portion away from the fixing plate, and the conical portion extends downward away from the cylindrical portion to form a frustum of a cone, and a specified interval is formed between the frustum of the cone and the buckle portion.

[0015] Further, a coil fixing portion is provided at one end of the frustum of the cone away from the connecting portion, and a through hole is provided in the coil fixing portion. The receiving coil is arranged in the through hole, and the through hole is located on the same axis of the winding cylinder and the fixing device.

[0016] The present invention also provides a method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, which is applied to the device described in any one of the above, and includes:

[0017] Connect the device for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario to the power amplifier circuit;

[0018] Apply an excitation current to the magnetic field emitting coil;

[0019] Obtain the electromotive force of the receiving coil based on the excitation current and according to a preset step size;

[0020] Judge whether the electromotive force is within the rated threshold according to a preset algorithm to fit the curve;

[0021] If the fitted curve of the electromotive force is within the rated threshold, the sensitivity of the receiving coil meets the expected standard.

[0022] Beneficial effects:

[0023] A device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to the present invention includes a magnetic field emitting coil, a winding cylinder, and a fixing device; the magnetic field emitting coil is wound around the winding cylinder counterclockwise or clockwise along the geometric center of the winding cylinder; a hollow chamber with both ends open is arranged inside the winding cylinder, the fixing device is arranged inside the hollow chamber and is snap-connected to the winding cylinder; the fixing device is used for installing a receiving coil that receives the magnetic field signal of the magnetic field emitting coil and generates a corresponding electromotive force. Therefore, this device is specifically designed for the electromagnetic positioning scenario, can adapt to different magnetic field intensities and working frequencies, improves the applicability of the device in detecting the sensitivity of the receiving coil, and through the specially designed arrangement method of the magnetic field emitting coil and the receiving coil, ensures the accuracy of the sensitivity detection, reduces the error caused by the inaccurate position of the receiving coil. At the same time, this device provides a consistent test environment, ensures the repeatability of each test result, is beneficial to quality control and product consistency assurance. In addition, this device design takes into account the interference factors in the electromagnetic positioning environment, can accurately detect the sensitivity of the receiving coil in an environment with strong interference ability, and ensures the reliability of the detection result. Description of the Drawings

[0024] Figure 1 is the overall schematic diagram of the device for detecting the sensitivity of the receiving coil in an electromagnetic positioning scenario according to an embodiment of the present invention;

[0025] Figure 2 is the overall schematic diagram of the magnetic field emitting coil according to an embodiment of the present invention;

[0026] Figure 3 is the overall schematic diagram of the fixing device according to an embodiment of the present invention;

[0027] Figure 4 is a top view of an embodiment of the present invention Figure 3 ;

[0028] Figure 5 is the A-A cross-sectional view of an embodiment of the present invention Figure 4 ;

[0029] Figure 6 is a schematic flow chart of a method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to an embodiment of the present invention

[0030] Wherein:

[0031] 1. Magnetic field emission coil; 2. Bobbin; 3. Fixing device; 4. Receiving coil; 5. Hollow chamber

[0032] 20. Cylinder body; 21. Limit baffle; 22. Support platform; 23. Cutting plane

[0033] 30. Fixing plate; 31. Buckling component; 32. Accommodating groove

[0034] 310. First buckling part; 311. Second buckling part

[0035] 3110. Connecting part; 3111. Buckling part; 3112. Groove; 3113. Elastic round head

[0036] 320. Cylindrical part; 321. Conical part; 323. Frustum; 324. Coil fixing part; 325. Through hole

[0037] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings Specific embodiments

[0038] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0042] Referring to Figure 1 、 Figure 3 , this embodiment provides a device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, including a magnetic field emitting coil 1, a winding cylinder 2, and a fixing device 3;

[0043] The magnetic field emitting coil 1 is wound around the winding cylinder 2 counterclockwise or clockwise along the geometric center of the winding cylinder 2;

[0044] A hollow chamber 5 with openings at both ends is provided inside the winding cylinder 2, and the fixing device 3 is arranged inside the hollow chamber 5 and is snap-connected to the winding cylinder 2;

[0045] The fixing device 3 is used to install and receive the magnetic field signal of the magnetic field emitting coil 1 and generate a receiving coil 4 with a corresponding electromotive force.

[0046] In the above embodiment, the device for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario includes a magnetic field emitting coil 1, a winding cylinder 2, and a fixing device 3, which is mainly used to detect the sensitivity of the receiving coil 4 in the electromagnetic positioning scenario. Among them, the winding cylinder 2 provides a fixed and orderly support structure for the magnetic field emitting coil 1, enabling the magnetic field emitting coil 1 to be evenly wound in a specific manner. The material of the magnetic field emitting coil 1 includes, but is not limited to, copper alloy, nickel alloy, or aluminum alloy, etc. The magnetic field emitting coil 1 is wound on the surface of the winding cylinder 2, and the magnetic field emitting coil 1 is wound counterclockwise or clockwise along the geometric center of the winding cylinder 2. Winding along the geometric center helps to generate a uniform magnetic field around the winding cylinder 2, ensuring the symmetry of the magnetic field emitting coil 1, reducing the distortion in the magnetic field distribution, and thus improving the consistency and predictability of the magnetic field. In addition, the winding cylinder 2 is preferably a cylinder, and a hollow chamber 5 is formed inside the winding cylinder 2, and the hollow chamber 5 extends along the entire length direction of the winding cylinder 2, passing through the inside of the winding cylinder 2, so that the hollow chamber 5 has an open structure at both ends. When connecting the fixing device 3 to the winding cylinder 2, the fixing device 3 is arranged inside the hollow chamber 5, and the fixing device 3 is snap-connected to the winding cylinder 2. In addition, the material of the receiving coil 4 includes, but is not limited to, copper alloy, nickel alloy, or aluminum alloy, etc., and the fixing device 3 is used to install the receiving coil 4. The receiving coil 4 is the object to be measured and is mainly used to receive the magnetic field signal of the magnetic field emitting coil 1 and generate a corresponding electromotive force. Therefore, this device is specifically designed for the electromagnetic positioning scenario, can adapt to different magnetic field intensities and working frequencies, improves the applicability of the device in detecting the sensitivity of the receiving coil 4, and ensures the accuracy of the sensitivity detection through the specially designed arrangement of the magnetic field emitting coil 1 and the receiving coil 4, reducing the error caused by the inaccurate position of the receiving coil 4. At the same time, this device provides a consistent test environment, ensuring the repeatability of each test result, which is beneficial to quality control and product consistency assurance. In addition, this device design takes into account the interference factors in the electromagnetic positioning environment and can accurately detect the sensitivity of the receiving coil 4 in an environment with strong interference ability, ensuring the reliability of the detection results.

[0047] Refer to Figure 1, in one embodiment, the winding bobbin 2 includes a bobbin body 20 and limiting baffles 21. There are two limiting baffles 21 which are respectively arranged at both ends of the bobbin body 20. The bobbin body 20 is recessed by a specified distance towards the hollow chamber 5, so that a support platform 22 for placing the magnetic field emitting coil 1 is formed at the connection between the bobbin body 20 and the limiting baffles 21.

[0048] In the above embodiment, the winding bobbin 2 includes a bobbin body 20 and limiting baffles 21 connected to the bobbin body 20. The magnetic field emitting coil 1 is wound around the bobbin body 20. There are two limiting baffles 21, and the two limiting baffles 21 are respectively fixedly connected to both ends of the bobbin body 20. At the same time, the entire bobbin body 20 is recessed by a certain specified distance towards the hollow chamber 5, that is, the bobbin body 20 is recessed inward relative to the limiting baffles 21, and the bobbin body 20 and the limiting baffles 21 are an integral part. Therefore, the integrated design of the bobbin body 20 and the limiting baffles 21 provides higher structural stability for the entire winding bobbin 2, reducing errors caused by loose connections of different components. In addition, by the inward recess of the bobbin body 20, two support platforms 22 are formed at the connection between the bobbin body 20 and the limiting baffles 21 at both ends, and the support platforms 22 extend along the entire circumference of the bobbin body 20, for placing the first end coil and the last end coil of the magnetic field emitting coil 1 on the support platforms 22. When the entire magnetic field emitting coil 1 is wound around the bobbin body 20, it can effectively prevent the magnetic field emitting coil 1 from falling off the bobbin body 20 during winding or use, ensuring the safety of the magnetic field emitting coil 1. And by placing the first end coil and the last end coil on the support platforms 22, it provides clear fixing points for the magnetic field emitting coil 1, helping to maintain the correct position of the magnetic field emitting coil 1.

[0049] Refer to Figure 1 - Figure 2 , in one embodiment, when the magnetic field emitting coil 1 is wound around the bobbin body 20, cutting planes 23 are provided on the first end coil and the last end coil of the magnetic field emitting coil 1, and the cutting planes 23 are located on the side of the magnetic field emitting coil 1 close to the limiting baffle 21 and are attached to the support platform 22.

[0050] In the above embodiments, when the magnetic field emitting coil 1 is wound around the cylinder body 20, the head coil and the tail coil of the magnetic field emitting coil 1 are placed on the support platforms 22 at both ends. The head coil is the coil that first winds around the entire circumference of the cylinder body 20 for one circle, and the tail coil is the coil that finally winds around the entire circumference of the cylinder body 20 for one circle. At the same time, a cutting plane 23 is formed on both the head coil and the tail coil. And when the head coil and the tail coil are placed on the support platforms 22 at both ends, the cutting plane 23 is located on the side of the magnetic field emitting coil 1 close to the limit baffle 21, and the cutting plane 23 is kept parallel to the support platform 22, so that the head coil and the tail coil of the magnetic field emitting coil 1 are attached to the support platform 22 through the cutting plane 23, ensuring the precise placement of the magnetic field emitting coil 1 on the support platform 22, helping to maintain the correct position and arrangement of the magnetic field emitting coil 1. And the parallel cutting plane 23 can make the magnetic field emitting coil 1 evenly distributed on the support platform 22, reducing the pressure at the contact points between the magnetic field emitting coil 1 and the support platform 22, avoiding local deformation or damage. At the same time, the parallel contact cutting plane 23 increases the contact area between the magnetic field emitting coil 1 and the support platform 22, which can prevent the magnetic field emitting coil 1 from moving or vibrating during use and maintain the stability of the magnetic field emitting coil 1.

[0051] Referring to Figure 1 - Figure 2 , in one embodiment, the cutting plane 23 extends along the circumferential direction of the cylinder body 20, and the extension length is greater than or equal to half of the circumference of the cylinder body 20 and less than or equal to three-quarters of the circumference of the cylinder body 20, and the cutting depth of the cutting plane 23 gradually decreases inward from the head and / or tail of the magnetic field emitting coil 1.

[0052] In the above embodiments, when the first-end coil and the last-end coil are wound along the circumferential direction of the cylinder body 20, the cutting plane 23 also extends along the circumferential direction of the cylinder body 20 on the first-end coil and the last-end coil, and the extension length of the cutting plane 23 on the first-end coil and the last-end coil is greater than or equal to half of the circumference of the cylinder body 20 and less than or equal to three-quarters of the circumference of the cylinder body 20. The relatively large extension length of the cutting plane 23 ensures that the contact area between the magnetic field emitting coil 1 and the support platform 22 is large enough, which helps to improve the stability and heat dissipation efficiency of the magnetic field emitting coil 1. Moreover, the relatively large contact area can provide a stronger fixing force and reduce the possibility of displacement of the magnetic field emitting coil 1 due to vibration or external force. Additionally, the cutting plane 23 cuts from the end of the magnetic field emitting coil 1 close to the support platform 22 towards the end of the magnetic field emitting coil 1 far from the support platform 22, thereby forming a cutting depth on the first-end coil and the last-end coil of the magnetic field emitting coil 1, and this cutting depth gradually decreases inward from the first end and / or the last end of the magnetic field emitting coil 1, that is, the cutting depth on the first-end coil gradually becomes smaller from the first end along the winding direction, and the cutting depth on the last-end coil gradually becomes smaller from the last end along the winding direction opposite to that of the first-end coil. The gradual decrease in the cutting depth of the first-end coil and the last-end coil can provide a progressive fixing mechanism for the magnetic field emitting coil 1, so as to provide different degrees of fixing strength in different regions and enhance the mechanical stability of the magnetic field emitting coil 1 on the support platform 22, and reduce displacement caused by vibration or mechanical shock.

[0053] Referring to Figure 1 、 Figure 3 In one embodiment, the fixing device 3 includes a fixing plate 30 and a buckle member 31 connected to the fixing plate 30. The fixing plate 30 is attached to the limiting baffle 21, and the buckle member 31 is located in the hollow chamber 5 and is in interference fit with the inner wall of the hollow chamber 5.

[0054] In the above embodiments, the fixing device 3 includes a fixing plate 30 and a buckle member 31 connected to the fixing plate 30. When the fixing device 3 is connected to the winding cylinder 2, the fixing plate 30 is located at the two open ends of the hollow chamber 5, and the diameter of the fixing plate 30 is greater than that of the hollow chamber 5, so that the fixing plate 30 fits on the limiting baffle 21, ensuring that the fixing plate 30 can closely fit on the limiting baffle 21, providing better stability for the connection between the fixing device 3 and the winding cylinder 2. In addition, the buckle member 31 is connected below the fixing plate 30, so that when the fixing device 3 is connected to the winding cylinder 2, the buckle member 31 is located inside the hollow chamber 5, and the buckle member 31 is connected to the inner wall of the hollow chamber 5 by an interference fit connection method, ensuring that the buckle member 31 is firmly fixed in the hollow chamber 5 and not easily loosened, reducing the displacement or vibration of the buckle member 31 during use, keeping the position of the receiving coil 4 accurate, improving the structural stability of the entire fixing device 3, and since the fixing plate 30 is located outside the hollow chamber 5, when disassembling or maintaining the fixing device 3 from the winding cylinder 2, it makes the disassembly of the fixing device 3 more direct and simple, without having to reach deep into the hollow chamber 5, and the receiving coil 4 inside the fixing device 3 will not be disturbed or contacted during the disassembly of the fixing device 3, reducing the risk of damaging the receiving coil 4.

[0055] Referring to Figure 3 - Figure 5 , in an embodiment, the buckle member 31 includes a first buckle portion 310 and a second buckle portion 311. The first buckle portion 310 is connected to the fixing plate 30, and one end of the first buckle portion 310 away from the fixing plate 30 is recessed inward. The second buckle portion 311 is connected to the inner concave portion of the first buckle portion 310 away from the fixing plate 30.

[0056] In the above embodiments, the buckle portion 3111 includes a first buckle portion 310 and a second buckle portion 311. The first buckle portion 310 is connected to the fixing plate 30, and at one end of the first buckle portion 310 away from the fixing plate 30, it is recessed toward the central axis direction of the entire fixing device 3, so that the first buckle portion 310 forms a cylindrical structure at the end connected to the fixing plate 30, and forms a concave structure connected to the cylindrical structure at the end of the first buckle portion 310 away from the fixing plate 30. And this concave structure extends along the entire circumference direction of the first buckle portion 310, and the concave structure is provided with an arc-shaped chamfer between the cylindrical structure and the second buckle portion 311, so that the second buckle portion 311 is connected to one end of the concave structure away from the cylindrical structure, so that a certain height difference is formed between the first buckle portion 310 and the second buckle portion 311. And the fixing plate 30, the first buckle portion 310 and the second buckle portion 311 are an integral part, effectively improving the structural stability of the fixing device 3, reducing the problems caused by improper connection of multiple independent components, and enabling the fixing device 3 to have better mechanical strength and be able to withstand greater mechanical stress.

[0057] Referring to Figure 1 , Figure 3 - Figure 5 , in an embodiment, the second buckle portion 311 includes a connecting portion 3110 connected to the first buckle portion 310, and a buckle portion 3111 connected to one end of the connecting portion 3110 away from the first buckle portion 310. And a plurality of grooves 3112 are arranged at intervals on the buckle portion 3111, and a convex elastic round head 3113 is arranged at one end of the buckle portion 3111 away from the connecting portion 3110. When the elastic round head 3113 is in interference fit with the first buckle portion 310 on the inner wall of the hollow chamber 5, a specified gap is formed between a part of the buckle portion 3111 and the connecting portion 3110 and the inner wall of the hollow chamber 5.

[0058] In the above embodiments, the second buckle portion 311 includes a connecting portion 3110 and a buckle portion 3111. The connecting portion 3110 is connected to the first buckle portion 310. The buckle portion 3111 is connected to one end of the connecting portion 3110 away from the first buckle portion 310. A plurality of grooves 3112 are provided on the buckle portion 3111, and the plurality of grooves 3112 are evenly spaced at a certain distance. At the same time, the grooves 3112 extend in the direction close to the connecting portion 3110, so that the depth of the grooves 3112 is equal to the height of the entire buckle portion 3111. The spaced grooves 3112 form a plurality of independent buckle individuals on the buckle portion 3111. When the plurality of independent buckle individuals are arranged in the hollow chamber 5, the entire buckle portion 3111 has the ability of elastic deformation. The elastic buckle portion 3111 can provide a better fastening effect, ensure close cooperation during the buckling process, prevent loosening, and can more easily fit the buckle portion 3111 into the hollow chamber 5 and firmly lock after being in place, effectively simplifying the installation process and improving the installation efficiency. In addition, an elastic round head 3113 is provided at one end of the buckle portion 3111 away from the connecting portion 3110, and the elastic round head 3113 protrudes outward away from the center of the buckle portion 3111 to form a semi-circular convex structure. Therefore, when the buckle portion 3111 is located in the hollow chamber 5 and the elastic round head 3113 is in interference fit with the first buckle portion 310 on the inner wall of the hollow chamber 5, a specified gap is formed between a part of the buckle portion 3111 and the connecting portion 3110 and the inner wall of the hollow chamber 5, so that this part is in a non-contact state with the inside of the hollow chamber 5, reducing the contact stress between the buckle portion 3111 and the inner wall of the hollow chamber 5, avoiding local stress concentration caused by interference fit, reducing wear, and thus improving the durability of the buckle portion 3111.

[0059] Referring to Figure 1 , Figure 3 - Figure 5 , in one embodiment, a receiving groove 32 is provided in the fixing device 3. The receiving groove 32 includes a cylindrical portion 320 and a conical portion 321. The cylindrical portion 320 is located at one end close to the fixing plate 30. The conical portion 321 is provided at one end of the cylindrical portion 320 away from the fixing plate 30, and the conical portion 321 extends downward away from the cylindrical portion 320 to form a frustum 323, and a specified interval is formed between the frustum 323 and the buckle portion 3111.

[0060] In the above embodiment, a receiving groove 32 is provided in the fixing device 3, and the receiving groove 32 includes a cylindrical portion 320 and a conical portion 321. The cylindrical portion 320 is located at one end close to the fixing plate 30, and an arc-shaped chamfer design is formed at the connection between the cylindrical portion 320 and the fixing plate 30. The conical portion 321 is provided at the end of the cylindrical portion 320 away from the fixing plate 30, and the conical portion 321 extends downward away from the cylindrical portion 320 to form a frustum 323, so that the receiving groove 32 penetrates through the fixing plate 30, the first buckle portion 310, and the connecting portion 3110 from top to bottom in sequence. The frustum 323 is connected to the end of the connecting portion 3110 away from the first buckle portion 310, so that the frustum 323 is located at the middle position of the buckle portion 3111, and a specified interval is formed between the frustum 323 and the buckle portion 3111, ensuring that the frustum 323 and the buckle portion 3111 are in a non-contact state, reducing the friction and wear between the frustum 323 and the buckle portion 3111, extending the service life of the entire fixing device 3, and providing a certain elastic space through the specified interval, which helps to absorb vibration and impact, protect the stability of the fixing device 3, and at the same time facilitate the disassembly and installation of the fixing device 3.

[0061] Referring to Figure 1 、 Figure 3 - Figure 5 , in an embodiment, a coil fixing portion 324 is provided at the end of the frustum 323 away from the connecting portion 3110, and a through hole 325 is provided in the coil fixing portion 324. The receiving coil 4 is arranged in the through hole 325, and the through hole 325 is located on the same axis as the winding cylinder 2 and the fixing device 3.

[0062] In the above embodiments, a coil fixing portion 324 is provided at one end of the frustum 323 away from the connecting portion 3110. The coil fixing portion 324 is preferably cylindrical and is provided on the central axis of the frustum 323. At the same time, the coil fixing portion 324 and the frustum 323 are an integral part. In addition, a through hole 325 is provided inside the coil fixing portion 324, and the through hole 325 communicates with the receiving groove 32. When the receiving coil 4 is installed on the fixing device 3, the receiving coil 4 is arranged in the through hole 325, and the receiving coil 4 is connected with the inner wall of the through hole 325 by interference fit. The length of the receiving coil 4 is less than or equal to the depth of the through hole 325, and the through hole 325 is located on the same axis as the winding cylinder 2 and the fixing device 3. When the receiving coil 4 is arranged in the through hole 325, the receiving coil 4 is synchronously located on the same axis as the winding cylinder 2 and the fixing device 3. Aligning the receiving coil 4 coaxially with the magnetic field emitting coil 1 helps to improve the measurement accuracy of electromagnetic induction, ensure the accuracy of the detection result, and the coaxial alignment can enhance the electromagnetic coupling between the receiving coil 4 and the magnetic field emitting coil 1, thereby improving the response ability of the receiving coil 4 to magnetic field changes. At the same time, it can ensure that the receiving coil 4 is located at the center of the magnetic field generated by the magnetic field emitting coil 1, which helps to generate a more uniform magnetic field distribution and reduce magnetic field distortion.

[0063] Referring to Figure 1 、 Figure 6 , the present invention also provides a method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, which is applied to the device described in any of the above embodiments, and includes:

[0064] S1: Connect the device for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario to the power amplifier circuit;

[0065] S2: Apply an excitation current to the magnetic field emitting coil 1;

[0066] S3: Obtain the electromotive force of the receiving coil 4 based on the excitation current and according to a preset step size;

[0067] S4: Judge whether the electromotive force is within the rated threshold according to a preset algorithm for fitting a curve;

[0068] S5: If the fitting curve of the electromotive force is within the rated threshold, the sensitivity of the receiving coil 4 meets the expected standard.

[0069] In the above embodiments, the method for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario is mainly applied to the device for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario. First, connect the power supply and signal input / output ports of the detection device to the corresponding power supply and equipment. Connect the output end of the power amplifier circuit to the input end of the magnetic field emitting coil 1 to ensure that the circuit connection is correct and stable, and check whether all connections comply with electrical safety specifications to ensure that there is no short circuit or poor contact. Secondly, turn on the power amplifier circuit and adjust the output power to a predetermined level to ensure that the output signal is stable. Apply an excitation current to the magnetic field emitting coil 1, and the magnitude of the current should be set according to the design parameters of the coil and the test requirements. Observe the output indication of the power amplifier circuit to ensure the stability and accuracy of the excitation current. Place the receiving coil 4 in the magnetic field generated by the magnetic field emitting coil 1 to ensure its correct position and coaxial alignment with the magnetic field emitting coil 1. Measure and record the electromotive force induced in the receiving coil 4 through the circuit connected to the receiving coil 4. According to the test requirements, adjust the excitation current using a preset step size and repeat the measurement to obtain a series of data points to improve the signal quality. The preset step size includes, but is not limited to, current amplitude step size, frequency step size, time step size, number of turns step size, position step size, phase step size, signal duty cycle step size, response time step size, etc. Additionally, input the measured electromotive force data into a preset algorithm, which can be polynomial fitting, exponential fitting, or other suitable mathematical models. Use the algorithm to perform curve fitting on the electromotive force data to generate a curve describing the change of the electromotive force, and evaluate the goodness of fit of the fitting curve, such as mean square error (MSE), coefficient of determination (R 2 ) etc., to ensure the accuracy of the fitting result. Finally, compare the fitting curve with a preset rated threshold to determine whether the electromotive force is within the rated threshold. If the fitting curve of the electromotive force is within the rated threshold, it is considered that the sensitivity of the receiving coil 4 meets the expected standard and the test passes. If the fitting curve of the electromotive force exceeds the rated threshold, the reason needs to be further analyzed. It may be necessary to adjust the excitation current, reposition the receiving coil 4, or optimize the circuit design. Therefore, through the above steps, the excitation current can be precisely controlled and the electromotive force of the receiving coil 4 can be measured, accurately evaluating the sensitivity of the receiving coil 4, and at the same time ensuring that each receiving coil 4 has appropriate sensitivity, which helps to improve the reliability of the entire electromagnetic positioning system.

[0070] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, characterized in that: It includes a magnetic field transmitting coil, a winding bobbin, and a fixing device; The magnetic field transmitting coil is wound on the bobbin counterclockwise or clockwise along the geometric center of the bobbin; The winding drum is provided with a hollow chamber with two ends opened, and the fixing device is arranged in the hollow chamber and is buckledly connected with the winding drum; The fixing device is used to install a receiving coil that receives the magnetic field signal of the magnetic field transmitting coil and generates a corresponding electromotive force; The fixing device includes a fixing plate and a snap-fit ​​component connected to the fixing plate. A receiving groove is arranged in the fixing device. The receiving groove includes a cylindrical portion and a conical portion. The conical portion extends downward away from the cylindrical portion to form a frustum. A coil fixing portion is arranged at one end of the frustum away from the connecting portion of the snap-fit ​​component.

2. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 1, characterized in that: The winding drum includes a drum body and a limit baffle, wherein the number of the limit baffles is two and they are respectively arranged at both ends of the drum body, and the drum body is recessed inwardly by a specified distance toward the hollow chamber, so that the connection between the drum body and the limit baffle forms a support platform for placing the magnetic field transmitting coil.

3. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 2, characterized in that: When the magnetic field transmitting coil is wound on the cylinder body, a cutting plane is provided on the head end coil and the tail end coil of the magnetic field transmitting coil, and the cutting plane is located on a side of the magnetic field transmitting coil close to the limit baffle and is attached to the support platform.

4. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 3, characterized in that: The cutting plane extends along the circumference direction of the barrel body, and the extension length is greater than or equal to one half of the circumference of the barrel body and less than or equal to three quarters of the circumference of the barrel body, and the cutting depth of the cutting plane gradually decreases inward from the head end and / or the tail end of the magnetic field transmitting coil.

5. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 2, characterized in that: The fixing plate is attached to the limiting baffle, and the buckle component is located in the hollow chamber and is interference-fitted with the inner wall of the hollow chamber.

6. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 5, characterized in that: The snap-fit ​​component includes a first snap-fit ​​portion and a second snap-fit ​​portion, wherein the first snap-fit ​​portion is connected to the fixing plate, and an end of the first snap-fit ​​portion away from the fixing plate is recessed inwardly, and the second snap-fit ​​portion is connected to the recessed portion of the end of the first snap-fit ​​portion away from the fixing plate.

7. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 6, characterized in that: The second buckle portion includes a connecting portion connected to the first buckle portion, and a buckle portion connected to an end of the connecting portion away from the first buckle portion, and a plurality of spaced grooves are provided on the buckle portion, and a raised elastic round head is provided at an end of the buckle portion away from the connecting portion, and when the elastic round head and the first buckle portion are interference fit on the inner wall of the hollow chamber, part of the buckle portion and the connecting portion form a specified gap with the inner wall of the hollow chamber.

8. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 7, characterized in that: The cylindrical portion is located at one end close to the fixing plate, the conical portion is arranged at one end of the cylindrical portion away from the fixing plate, and a specified interval is formed between the frustum and the buckle portion.

9. The device for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario according to claim 8, characterized in that: A through hole is provided in the coil fixing portion, the receiving coil is arranged in the through hole, and the through hole is located on the same axis of the winding drum and the fixing device.

10. A method for detecting the sensitivity of a receiving coil in an electromagnetic positioning scenario, applied to the device according to any one of claims 1 to 9, characterized in that: include: Connecting the device for detecting the sensitivity of the receiving coil in the electromagnetic positioning scenario to a power amplifier circuit; applying an excitation current to the magnetic field transmitting coil; Acquiring the electromotive force of the receiving coil based on the excitation current and according to a preset step size; Determining whether the electromotive force is within a rated threshold value according to a preset algorithm fitting curve; If the fitting curve of the electromotive force is within the rated threshold, the sensitivity of the receiving coil meets the expected standard.

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