Anti-interference electromagnetic transmitter and electromagnetic positioning system
By setting the coil fixing assembly and the trace connected to the coil on the substrate of the electromagnetic emitter, the interference problem of signal lines on the magnetic field environment is solved, and higher anti-interference performance and the integrity of the electromagnetic signal are achieved.
Patent Information
- Application Number
- CN202421770624.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-24
AI Technical Summary
In existing electromagnetic emitters, direct welding or mechanical connection between the signal line and the transmitting coil causes the signal line to become a potential source of interference in the magnetic field, increasing the possibility of electromagnetic loops, and thus aggravate interference to the magnetic field environment.
An anti-interference electromagnetic emitter is designed. By providing a coil fixing assembly and a trace that can be connected to the coil on the substrate, each two traces form a group. The first connection end is connected to the inlet and outlet ends of the coil, and the second connection end extends to the preset external area to reduce the interference of the trace to the electromagnetic signal emitted by the coil.
It effectively reduces the interference of traces to the electromagnetic signals emitted by the coil, improves the anti-interference performance of the electromagnetic emitter, and maintains the waveform integrity of the electromagnetic signal.
Smart Images
Figure CN222826172U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of electronic circuit technology, and specifically relates to an anti-interference electromagnetic transmitter and an electromagnetic positioning system. Background Art
[0002] The electromagnetic positioning system is a high-precision three-dimensional coordinate and attitude angle measurement tool, which has shown irreplaceable value in the fields of industrial measurement and medical testing. Its core mechanism is that the electromagnetic transmitter builds a dynamically changing magnetic field environment, and the electromagnetic receiver senses the fluctuation of the magnetic field and accurately restores the position coordinates and attitude angle of the electromagnetic transmitter in space, thereby achieving all-round and no-dead-angle monitoring and positioning of the target object.
[0003] However, in existing electromagnetic transmitters, the signal line and the transmitting coil are often connected by direct welding or mechanical connection, which makes the signal line inevitably close to the coil. This layout not only makes the signal line itself a potential interference source in the magnetic field, but also the redundant part of its length twists and turns or coils inside the electromagnetic transmitter, which may form an unexpected electromagnetic loop and aggravate the interference to the magnetic field environment. Therefore, how to reduce the interference of the electromagnetic transmitter to the magnetic field environment of the coil is an urgent problem to be solved by people in this field. Utility Model Content
[0004] The embodiments of the present application provide an anti-interference electromagnetic transmitter and an electromagnetic positioning system, the purpose of which is to reduce the interference of wiring on the electromagnetic signal emitted by the coil.
[0005] In a first aspect, an embodiment of the present application provides an anti-interference electromagnetic transmitter, the electromagnetic transmitter comprising:
[0006] Substrates, traces, and electromagnetic emitting components;
[0007] Wherein, a coil fixing component is arranged on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component;
[0008] An electromagnetic transmitting assembly, comprising at least one coil, for generating an electromagnetic signal;
[0009] The wirings are grouped into two at a time; the first connection end of each group of wirings is respectively connected to the incoming end and the outgoing end of a coil, and the second connection end extends to a preset external connection area.
[0010] Furthermore, the first connection end is arranged below the coil, or within a preset range of the coil.
[0011] Furthermore, the electromagnetic transmitter also includes:
[0012] Cover plate;
[0013] The cover plate is arranged above the substrate, and the coil fixing assembly is arranged on the cover plate.
[0014] Furthermore, the cover plate is provided with a wire outlet hole for allowing the wire inlet and wire outlet of the coil to pass through and be connected to the first connecting end.
[0015] Furthermore, the wire outlet hole is arranged in alignment with the first connection end.
[0016] Furthermore, the first connection end is provided with a welding via hole for welding and connecting with the input terminal and the output terminal of the coil respectively.
[0017] Further, the substrate is provided with four layers;
[0018] The first and fourth layers of the four-layer substrate are used for grounding, and the wiring is arranged on the second and third layers of the four-layer substrate.
[0019] Furthermore, the preset external area is arranged at an edge position of one side of the substrate.
[0020] Furthermore, the coil fixing assembly includes a horizontal coil fixing assembly and / or a vertical coil fixing assembly.
[0021] In a second aspect, an embodiment of the present application provides an electromagnetic positioning system, wherein the electromagnetic positioning system includes the electromagnetic transmitter as described in the first aspect; and further includes:
[0022] The electromagnetic receiver is used to receive the electromagnetic signal generated by the electromagnetic transmitter.
[0023] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the electromagnetic transmitter as described in the first aspect.
[0024] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the electromagnetic transmitter as described in the first aspect is implemented.
[0025] In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the electromagnetic transmitter as described in the first aspect.
[0026] In the embodiment of the present application, there is a substrate, a wiring and an electromagnetic transmitting component; wherein a coil fixing component is provided on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component; the electromagnetic transmitting component includes at least one coil for generating an electromagnetic signal; the wirings are grouped in pairs; the first connection end of each group of wirings is respectively connected to the input and output ends of a coil, and the second connection end extends to a preset external connection area. The above-mentioned anti-interference electromagnetic transmitter has a coil fixing component and wiring that can be connected to the coil on the substrate, which can reduce the interference of the wiring on the electromagnetic signal emitted by the coil. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a schematic structural diagram of an anti-interference electromagnetic transmitter provided in Example 1 of the present application;
[0028] Figure 2 is a schematic structural diagram of an anti-interference electromagnetic transmitter provided in Example 1 of the present application;
[0029] Figure 3 is a schematic structural diagram of an anti-interference electromagnetic transmitter provided in Embodiment 2 of the present application;
[0030] Figure 4 is a schematic structural diagram of an anti-interference electromagnetic transmitter provided in Embodiment 2 of the present application;
[0031] Figure 5 is a schematic structural diagram of an anti-interference electromagnetic transmitter provided in Embodiment 2 of the present application;
[0032] Figure 6 It is a schematic diagram of the structure of the substrate and wiring provided in Example 2 of the present application;
[0033] Figure 7 is a schematic diagram of the structure of the substrate provided in Example 3 of the present application;
[0034] Figure 8 is a schematic diagram of the structure of the electromagnetic positioning system provided in Embodiment 4 of the present application;
[0035] Fig. 9 It is a schematic diagram of the structure of an electronic device provided in Example 5 of the present application. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the convenience of description, only the part related to the present application but not all the contents are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow chart describes each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of each operation can be rearranged. The process can be terminated when its operation is completed, but it can also have additional steps not included in the accompanying drawings. The process can correspond to a method, a function, a procedure, a subroutine, a subprogram, etc.
[0037] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.
[0038] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0039] The anti-interference electromagnetic transmitter and battery management system provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.
[0040] Embodiment 1
[0041] Figure 1 Schematic diagram of the structure of the anti-interference electromagnetic transmitter provided in Example 1 of the present application. Figure 1 As shown, the electromagnetic transmitter comprises:
[0042] Substrates, traces, and electromagnetic emitting components;
[0043] Wherein, a coil fixing component is arranged on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component;
[0044] An electromagnetic transmitting assembly, comprising at least one coil, for generating an electromagnetic signal;
[0045] The wirings are grouped into two at a time; the first connection end of each group of wirings is respectively connected to the incoming end and the outgoing end of a coil, and the second connection end extends to a preset external connection area.
[0046] First, the present application is applicable to a scenario where a coil is used to generate an electromagnetic signal to calibrate the position of the coil.
[0047] Substrate and traces. The substrate is the core component of the circuit board, used to support and fix various electronic components on the circuit board. The trace is a conductive path used to transmit electrical signals from the first connection end to the second connection end, thereby controlling the coil to generate electromagnetic signals. Specifically, the trace can be a signal line with a shielding effect. In particular, the layout of the trace on the substrate should avoid winding and repeated folding, which can make the trace become a coil.
[0048] The substrate is provided with a coil fixing component, and the coil fixing component is used to fix the electromagnetic transmitting component. The coil fixing component can be a structural part dedicated to fixing the coil, and commonly used coil fixing components include a coil frame, a coil fixing clip, a coil shield, and a magnetic core. The coil fixing component can be directly fixed on the substrate by screw fixing, snap / slot fixing, adhesive fixing, and welding fixing.
[0049] The electromagnetic transmitting assembly includes at least one coil for generating electromagnetic signals. The coil is a spiral structure wound by a wire and can generate electromagnetic signals. Among them, the electromagnetic signal is a signal form that uses electromagnetic waves to propagate in space.
[0050] The wirings are grouped into two at a time; the first connection end of each group of wirings is respectively connected to the input and output ends of a coil, and the second connection end extends to a preset external connection area. Figure 1 As shown, the solid circle end point of the routing line represents the first connection end of the routing line, and the hollow circle end point of the routing line represents the second connection end of the routing line. The inlet end of the coil refers to the starting end of the wire inside the coil, and the inlet end of the coil is connected to the first connection end of the routing line. The electrical signal is transmitted from the routing line to the coil through the inlet end (first connection end); the outlet end of the coil refers to the terminating end of the wire inside the coil, and the outlet end of the coil is connected to the first connection end of the routing line. The electrical signal is transmitted from the coil to the routing line through the outlet end (first connection end). The preset external connection area is a unified area on the substrate that is provided for the second connection end of each group of routing lines to connect to the external circuit.
[0051] In the present technical solution, optionally, the first connection end is arranged below the coil, or within a preset range of the coil.
[0052] Figure 2 Schematic diagram of the structure of the anti-interference electromagnetic transmitter provided in the first embodiment of the present application. Figure 2 is a front view, such as Figure 2 As shown, the first connection end being arranged below the coil may mean that the first connection end is arranged below the coil in the orthographic projection direction, and the dotted line portion represents the wiring that is blocked in the orthographic projection direction.
[0053] The preset range may be a pre-set range centered on the coil that shortens the length of the coil's lead wire.
[0054] The advantage of this arrangement of the present solution is that by setting the first connection end below the coil, the interference of the wiring on the coil can be reduced, and the anti-interference performance of the electromagnetic transmitter can be improved. By setting the first connection end within the preset range of the coil, the length of the coil output line can be reduced, thereby reducing electromagnetic coupling and reflection effects, and better maintaining the waveform integrity of the electromagnetic signal.
[0055] In the example of the present application, there are a substrate, wiring and an electromagnetic transmitting component; wherein a coil fixing component is provided on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component; the electromagnetic transmitting component includes at least one coil for generating an electromagnetic signal; the wirings are grouped in pairs; the first connection end of each group of wirings is respectively connected to the input and output ends of a coil, and the second connection end extends to a preset external connection area. In this technical solution, a coil fixing component and wiring that can be connected to the coil are provided on the substrate, which can reduce the interference of the wiring on the electromagnetic signal emitted by the coil.
[0056] Embodiment 2
[0057] Figure 3 This is a schematic diagram of the structure of the anti-interference electromagnetic transmitter provided in the second embodiment of the present application. This solution makes a better improvement on the basis of the above embodiment, and the specific improvement is: the electromagnetic transmitter also includes: a cover plate; the cover plate is arranged above the substrate, and the coil fixing assembly is arranged on the cover plate.
[0058] like Figure 3 As shown, the electromagnetic transmitter comprises:
[0059] Baseboard, wiring, electromagnetic transmitting components and cover;
[0060] Wherein, a coil fixing component is arranged on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component;
[0061] An electromagnetic transmitting assembly, comprising at least one coil, for generating an electromagnetic signal;
[0062] The wirings are grouped into two at a time; the first connection end of each group of wirings is respectively connected to the input end and the output end of a coil, and the second connection end extends to a preset external connection area;
[0063] The cover plate is arranged above the substrate, and the coil fixing assembly is arranged on the cover plate.
[0064] The cover plate can be a structure disposed above the substrate so that the coil fixing assembly does not need to be directly disposed on the substrate. The coil fixing assembly can be fixed to the cover plate by screw fixing, snap / slot fixing, and adhesive fixing. Figure 3 As shown, the dotted line portion represents the traces and substrate that are blocked in the orthographic projection direction.
[0065] In the present technical solution, optionally, a wire outlet hole is provided on the cover plate, for allowing the wire inlet and wire outlet of the coil to pass through and be connected to the first connecting end.
[0066] The outlet hole can be a hole on the cover plate for the inlet and outlet ends of the coil to pass through and connect to the first connection end. The number of outlet holes is consistent with the number of coil fixing components, and the inlet and outlet ends of a coil pass through the same outlet hole. The size of the outlet hole can be set according to the thickness of the inlet and outlet ends of the coil.
[0067] Figure 4 and Figure 5 Schematic diagram of the structure of the anti-interference electromagnetic transmitter provided in the second embodiment of the present application. Figure 4 and Figure 5 As shown, the wire outlet hole is set within the preset range of the coil.
[0068] In the present technical solution, optionally, the wire outlet hole is arranged in alignment with the first connection end.
[0069] The alignment of the wire outlet hole and the first connection end may mean that in the orthographic projection direction, the center of the wire outlet hole and the center of the first connection end are on the same straight line.
[0070] Figure 6 Schematic diagram of the structure of the substrate and wiring provided in the second embodiment of the present application. Figure 4 and Figure 6 As shown, the wire outlet holes correspond to the first connection ends one by one.
[0071] The advantage of this arrangement of the present invention is that the wire outlet hole is arranged in alignment with the first connection end, which can shorten the length of the coil outlet wire, improve the anti-interference effect of the coil, and reduce the electromagnetic interference of the coil on the wiring.
[0072] In the present technical solution, optionally, the first connection end is provided with a welding via hole for welding and connecting with the input terminal and the output terminal of the coil respectively.
[0073] Solder vias are a layer of conductive metal deposited on the surface of the hole wall after drilling a hole in a printed circuit board. Soldering is a widely used connection technology used to firmly connect metal parts together through heat and pressure. Figure 6 As shown, the first connection end is provided with a welding via.
[0074] The advantage of this arrangement of the present solution is that by providing a welding via at the first connection end, the connection between the first connection end and the incoming and outgoing ends of the coil can be facilitated, thereby optimizing the processing technology of the electromagnetic transmitter and improving the processing efficiency.
[0075] The advantage of this arrangement of the present invention is that, by providing the outlet hole on the cover plate, the inlet and outlet ends of the coil can be easily connected to the first connection end, thereby shortening the length of the coil outlet and improving the anti-interference effect.
[0076] The advantage of this arrangement of the present invention is that by arranging a cover plate above the substrate and arranging the coil fixing assembly on the cover plate, the mechanical positioning and installation accuracy of the coil fixing assembly can be better controlled compared to directly arranging the coil fixing assembly on the substrate.
[0077] Embodiment 3
[0078] Figure 7 This is a schematic diagram of the structure of the substrate provided in Example 3 of the present application. This solution makes better improvements on the basis of the above embodiments, and the specific improvements are: the substrate is provided with four layers; wherein the first and fourth layers of the four-layer substrate are used for grounding, and the routing is provided on the second and third layers of the four-layer substrate.
[0079] like Figure 7 As shown, the top layer is the first layer, the bottom layer is the fourth layer, the first and fourth layers are used for grounding, and the routing is set on the second and third layers.
[0080] The advantage of this arrangement of the present solution is that the two outer layers are used for grounding, and the grounding wire can be connected to the shielding layer of the external circuit, thereby effectively absorbing and conducting away the electromagnetic interference generated by the two middle layers of routing.
[0081] In the present technical solution, optionally, the preset external area is arranged at an edge position of one side of the substrate.
[0082] like Figure 1 , Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, the preset external connection area is set at the edge position of one side of the substrate. The edge position of one side of the substrate can be the edge position of one side of the concentrated area of the first connection end of each group of wiring on the substrate. Optionally, as Figure 3 and Figure 5 As shown, in the case where the electromagnetic transmitter includes a cover plate, the cover plate may not be disposed above the preset external area.
[0083] The advantage of this arrangement of the present solution is that by setting the preset external connection area at the edge of one side of the substrate, centralized management of the connection between the second connection ends of each group of wiring and the external circuit can be achieved, thereby improving the external connection efficiency of the second connection ends.
[0084] In the present technical solution, optionally, the coil fixing assembly includes a horizontal coil fixing assembly and / or a vertical coil fixing assembly.
[0085] like Figure 5 As shown, the horizontal coil fixing assembly may refer to a coil fixing assembly that enables the central axis of the coil to be in a horizontal direction, and the vertical coil fixing assembly may refer to a coil fixing assembly that enables the central axis of the coil to be in a vertical direction.
[0086] The advantage of such a configuration of the present solution is that the horizontal coil fixing component and the vertical coil fixing component can meet the corresponding requirements for the transmission of electromagnetic signals, thereby improving the applicable scenarios of the present solution.
[0087] Embodiment 4
[0088] Figure 8 Schematic diagram of the structure of an electromagnetic positioning system provided in the fourth embodiment of the present application. Figure 8 As shown, an electromagnetic positioning system 800 includes the anti-interference electromagnetic transmitter 801 described in the above embodiments, and also includes an electromagnetic receiver 802 for receiving the electromagnetic signal generated by the electromagnetic transmitter.
[0089] In the electromagnetic positioning system, a coil fixing component and a wiring that can be connected to the coil are arranged on the substrate, which can reduce the interference of the wiring on the electromagnetic signal emitted by the coil.
[0090] Embodiment 5
[0091] like Fig. 9 As shown, embodiment five of the present application also provides an electronic device 900, including a processor 901, a memory 902, and a program or instruction stored in the memory 902 and executable on the processor 901. When the program or instruction is executed by the processor 901, each process of the above-mentioned anti-interference electromagnetic transmitter embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.
[0092] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.
[0093] Embodiment 6
[0094] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned anti-interference electromagnetic transmitter embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
[0095] The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
[0096] Embodiment 7
[0097] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned anti-interference electromagnetic transmitter embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
[0098] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.
[0099] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.
[0100] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.
[0101] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.
[0102] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.
Claims
1. An anti-interference electromagnetic transmitter, characterized in that: The electromagnetic transmitter comprises: Substrates, traces, and electromagnetic emitting components; Wherein, a coil fixing component is arranged on the substrate, and the coil fixing component is used to fix the electromagnetic transmitting component; An electromagnetic transmitting assembly, comprising at least one coil, for generating an electromagnetic signal; The wirings are grouped into two at a time; the first connection end of each group of wirings is respectively connected to the incoming end and the outgoing end of a coil, and the second connection end extends to a preset external connection area.
2. The electromagnetic transmitter according to claim 1, characterized in that: The first connection end is arranged below the coil, or within a preset range of the coil.
3. The electromagnetic transmitter according to claim 2, characterized in that: Also includes: Cover plate; The cover plate is arranged above the substrate, and the coil fixing assembly is arranged on the cover plate.
4. The electromagnetic transmitter according to claim 3, characterized in that: The cover plate is provided with a wire outlet hole for allowing the wire inlet and wire outlet of the coil to pass through and be connected to the first connecting end.
5. The electromagnetic transmitter according to claim 4, characterized in that: The wire outlet hole is arranged in alignment with the first connection end.
6. The electromagnetic transmitter according to claim 4, characterized in that: The first connection end is provided with a welding via hole for welding and connecting with the input terminal and the output terminal of the coil respectively.
7. The electromagnetic transmitter according to claim 1, characterized in that: The substrate is provided with four layers; The first and fourth layers of the four-layer substrate are used for grounding, and the wiring is arranged on the second and third layers of the four-layer substrate.
8. The electromagnetic transmitter according to claim 1, characterized in that: The preset external connection area is arranged at an edge position of one side of the substrate.
9. The electromagnetic transmitter according to claim 1, characterized in that: The coil fixing assembly includes a horizontal coil fixing assembly and / or a vertical coil fixing assembly.
10. An electromagnetic positioning system, characterized in that: The electromagnetic transmitter according to any one of claims 1 to 9; and further comprising: The electromagnetic receiver is used to receive the electromagnetic signal generated by the electromagnetic transmitter.