Electromagnetic identification device

Abstract

The utility model discloses electromagnetic identification equipment, which comprises an electromagnetic identification board and a plurality of identification chess pieces, the electromagnetic identification board is provided with an operation processing module and a plurality of groups of identification antennas electrically connected with the operation processing module, and the plurality of groups of identification antennas are arranged at intervals; the plurality of identification chess pieces are used for being placed on the electromagnetic identification board, each identification chess piece is internally provided with an oscillating circuit, and the oscillating circuits are in signal connection with the plurality of groups of identification antennas; the operation processing module is used for transmitting or receiving electric signals, so that the identification chess pieces on the electromagnetic identification plate resonate and are fed back to the operation processing module, and the operation processing module obtains the positions of the identification chess pieces on the electromagnetic identification plate. According to the technical scheme, the recognition effect is improved, and therefore the use requirement of a user for the intelligent toy is met.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic equipment, in particular to an electromagnetic identification device. Background Art

[0002] In the current smart toy field, it is sometimes necessary to identify the position, type and angle of multiple targets within the plane of the toy, such as the identification of jigsaw puzzles, the identification of intelligent programming building blocks, the identification of various intelligent chess pieces, etc. Compared with traditional toys, when chess pieces can be identified, better prompts, guidance, AI game and other functions can be made to enhance the fun.

[0003] At present, the market mainly adopts RFID array, Hall sensor array, image recognition and other methods to realize the intelligent recognition function of chess pieces. The Hall sensor array is to place N*M Hall magnetic sensors on a plane, and judge whether the chess piece is on it by detecting whether the magnet is detected. The position accuracy resolution of this method depends on the density of the Hall sensor, but the increase in density brings a surge in the number of sensors, and generally can only identify whether there is a magnet but not the type. Relatively speaking, the RFID array can recognize more types, but the cost is high and it is only used in a small number of arrays. Image recognition uses basic components such as cameras and main control modules, and uses image processing and intelligent recognition algorithms to analyze the captured pictures. It has relatively good complexity and accuracy, but the camera needs to be placed at a certain height. In addition, there are certain requirements for light. Different light, especially sunlight, has a greater impact on the recognition effect. Therefore, the existing chess piece intelligent recognition function has certain shortcomings, resulting in poor recognition effect of smart toys and cannot meet the daily use of users. Utility Model Content

[0004] The main purpose of the utility model is to provide an electromagnetic identification device, aiming to improve the identification effect, so as to meet the user's demand for the use of smart toys.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes an electromagnetic identification device, which is applied to educational toys, and the electromagnetic identification device comprises:

[0006] An electromagnetic identification board, wherein the electromagnetic identification board is provided with a calculation processing module and a plurality of groups of identification antennas electrically connected to the calculation processing module, wherein the plurality of groups of identification antennas are arranged at intervals; and

[0007] A plurality of identification chess pieces, the plurality of identification chess pieces are used to be placed on the electromagnetic identification board, each of the identification chess pieces is provided with an oscillating circuit, and the oscillating circuit is connected to the plurality of identification antenna signals;

[0008] The operation processing module is used to transmit or receive electrical signals, so that the identification chess piece located on the electromagnetic identification board resonates and is fed back to the operation processing module, so that the operation processing module obtains the position of the identification chess piece on the electromagnetic identification board.

[0009] In one embodiment, each group of the identification antennas includes:

[0010] at least one first directional antenna, the first directional antenna being disposed on the electromagnetic identification board and extending along a direction of the electromagnetic identification board; and

[0011] At least one second directional antenna, the second directional antenna is arranged on the electromagnetic identification board and extends along another direction of the electromagnetic identification board; the first directional antenna and the second directional antenna are arranged at an angle, and the first directional antenna and the second directional antenna are arranged to partially overlap.

[0012] In one embodiment, both the first directional antenna and the second directional antenna are loop antennas.

[0013] In one embodiment, the operation processing module includes:

[0014] A circuit board, wherein the circuit board is arranged on the electromagnetic identification board;

[0015] A transmitting switch circuit, the transmitting switch circuit is electrically connected to the circuit board and is used to transmit an electrical signal;

[0016] a receiving switch circuit, the receiving switch circuit being electrically connected to the circuit board and configured to receive an electrical signal; and

[0017] An operation processing chip is arranged on the circuit board and is electrically connected to the transmitting switch circuit and the receiving switch circuit board; the operation processing chip is used to control the operation of the transmitting switch circuit and the receiving switch circuit, and is used to analyze the received electrical signal.

[0018] In one embodiment, the operation processing module further includes a coil selection circuit disposed between the circuit board and the transmitting switch circuit, and the coil selection circuit is used to select one of the groups of the identification antennas.

[0019] In one embodiment, the operation processing module further includes a filter circuit disposed between the transmitting switch circuit and the operation processing chip, wherein the filter circuit is electrically connected to the operation processing chip and is used for filtering the received electrical signal.

[0020] In one embodiment, the operation processing module further includes an amplifier circuit disposed between the filter circuit and the operation processing chip, wherein the amplifier circuit is electrically connected to the operation processing chip and is used to amplify the electrical signal received by the receiving switch circuit.

[0021] In one embodiment, the operation processing module further includes an integration circuit disposed between the amplifier circuit and the operation processing chip, wherein the integration circuit is electrically connected to the operation processing chip and is used to integrate the signal amplified by the amplifier circuit to obtain a DC signal.

[0022] In one embodiment, the oscillation circuit includes at least two oscillation parts, which are arranged at an interval and are used to detect the rotation angle of the identification chess piece.

[0023] In one embodiment, the electromagnetic identification device further comprises a display screen disposed on the electromagnetic identification board, wherein the display screen is electrically connected to the operation processing module and is used to display the electrical signal sent by the operation processing module.

[0024] The electromagnetic identification device of the technical solution of the utility model is applied to educational toys. The electromagnetic identification device includes an electromagnetic identification board and a plurality of identification pieces. The electromagnetic identification board is provided with an operation processing module and a plurality of identification antennas electrically connected to the operation processing module, and the plurality of identification antennas are arranged at intervals. The plurality of identification pieces are used to be placed on the electromagnetic identification board, and each identification piece is provided with an oscillation circuit, and the oscillation circuit is connected to the plurality of identification antenna signals. The operation processing module is used to transmit or receive electrical signals, so that the identification pieces located on the electromagnetic identification board resonate and are fed back to the operation processing module, so that the operation processing module obtains the position of the identification pieces on the electromagnetic identification board. In this way, there is no need to set up a rapidly increasing number of Hall sensors, a costly RFID array, or to avoid setting up an image recognition camera with high requirements for recognition light. In this embodiment, the specific position of the identification piece on the electromagnetic identification board can be analyzed by the operation processing module according to the alternating electromagnetic field signal fed back by the identification piece and the position of the plurality of identification antennas, thereby improving the recognition effect of the electromagnetic identification device without increasing the cost and structural complexity, thereby meeting the user's use requirements for smart toys equipped with the electromagnetic identification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1It is a structural schematic diagram of the first embodiment of the electromagnetic identification device of the utility model;

[0027] Figure 2 This is a schematic diagram of a circuit module of the electromagnetic identification device of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the identification antenna of the electromagnetic identification device of the utility model.

[0029] Description of Figure Numbers:

[0030] Label name Label name 10 Electromagnetic identification board 41 Circuit Board 20 Identify the antenna 42 Transmitter switch circuit 21 First directional antenna 43 Receiving switch circuit 22 Second directional antenna 44 Computing Processing Chip 30 Identify chess pieces 45 Coil selection circuit 31 Oscillator Circuit 46 Filter circuit 311 Oscillation unit 47 Amplifier Circuit 40 Operation processing module 48 Integrator Circuit

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The Hall sensor array places N*M Hall magnetic sensors on a plane, and determines whether the chess piece is on it by detecting whether the magnet is detected. The position accuracy resolution of this method depends on the density of the Hall sensor, but the increase in density brings a surge in the number of sensors, and generally can only identify whether there is a magnet but not the type. Relatively speaking, the RFID array can identify more types, but the cost is high and it is only used in a small number of arrays. Image recognition uses basic components such as cameras and main control modules, and uses image processing and intelligent recognition algorithms to analyze the captured pictures. It has relatively good complexity and accuracy, but the camera needs to be placed at a certain height. In addition, there are certain requirements for light. Different light, especially sunlight, has a greater impact on the recognition effect. Therefore, the existing chess piece intelligent recognition function has certain shortcomings, resulting in poor recognition effect of smart toys and cannot meet the daily use of users.

[0036] Therefore, the utility model proposes an electromagnetic identification device.

[0037] In the embodiment of the present utility model, please refer to Figures 1 to 3 The electromagnetic identification device is applied to educational toys. The electromagnetic identification device includes an electromagnetic identification board 10 and a plurality of identification pieces 30. The electromagnetic identification board 10 is provided with an operation processing module 40 and a plurality of identification antennas 20 electrically connected to the operation processing module 40. The plurality of identification antennas 20 are arranged at intervals. The plurality of identification pieces 30 are used to be placed on the electromagnetic identification board 10. Each identification piece 30 is provided with an oscillation circuit 31. The oscillation circuit 31 is signal-connected to the plurality of identification antennas 20. The operation processing module 40 is used to transmit or receive electrical signals, so that the identification pieces 30 located on the electromagnetic identification board 10 resonate and are fed back to the operation processing module 40, so that the operation processing module 40 obtains the position of the identification pieces 30 on the electromagnetic identification board 10.

[0038] Specifically, the electromagnetic identification board 10 is provided with a first inner cavity, in which an operation processing module 40 and multiple groups of identification antennas 20 are installed, and the multiple groups of identification antennas 20 are electrically connected to the operation processing module 40, and the multiple groups of identification antennas 20 are arranged in an array so that the multiple groups of identification antennas 20 form an identification position; and each identification chess piece 30 is provided with a second inner cavity, in which an oscillation circuit 31 is provided, and the oscillation circuit 31 is signal-connected to the multiple groups of identification antennas 20 of the electromagnetic identification board 10.

[0039] When one of the multiple identification chess pieces 30 is placed on the electromagnetic identification board 10, the operation processing module 40 of the electromagnetic identification board 10 controls the multiple identification antennas 20 to sequentially emit alternating electromagnetic field signals at a certain frequency. When the identification chess piece 30 placed on the electromagnetic identification board 10 has the same or similar frequency as a group of identification antennas 20 among the multiple identification antennas 20, the identification chess piece 30 will receive the energy emitted by the adjacent identification antenna 20 and use the oscillation circuit 31 in the identification chess piece 30 to generate resonance, so that the identification chess piece 30 generates electrical energy and sends the same signal to the operation processing module 40. In this way, there is no need to set up a rapidly increasing number of Hall sensors, expensive RFID arrays, and avoid setting up image recognition cameras with high recognition light requirements. In this embodiment, the processing module 40 only needs to analyze the specific position of the recognition chess piece 30 on the electromagnetic recognition board 10 according to the alternating electromagnetic field signal fed back by the recognition chess piece 30 and the positions of multiple groups of recognition antennas 20, thereby improving the recognition effect of the electromagnetic recognition device without increasing the cost and structural complexity, thereby meeting the user's demand for the use of smart toys equipped with the electromagnetic recognition device.

[0040] In one embodiment, see Figures 1 to 3 Each group of identification antennas 20 includes at least one first direction antenna 21 and at least one second direction antenna 22. The first direction antenna 21 is arranged on the electromagnetic identification board 10 and extends along one direction of the electromagnetic identification board 10; the second direction antenna 22 is arranged on the electromagnetic identification board 10 and extends along another direction of the electromagnetic identification board 10; the first direction antenna 21 and the second direction antenna 22 are arranged at an angle, and the first direction antenna 21 and the second direction antenna 22 are arranged to partially overlap.

[0041] Specifically, each group of identification antennas 20 is provided with a first direction antenna 21 and a second direction antenna 22 which are arranged at an angle, so that the first direction antenna 21 and the second direction antenna 22 are partially overlapped to form an overlap point; and the first direction antenna 21 is extended in one direction of the electromagnetic identification board 10, so that the first direction antenna 21 can partially overlap with the second direction antenna 22 of the remaining groups of identification antennas 20 to form more overlap points; such an arrangement enables multiple groups of identification antennas 20 to form multiple overlap points arranged in an array, so that the calculation processing module 40 can more easily analyze and locate the position of each identification chess piece 30 placed on the electromagnetic identification board 10 according to the multiple overlap points, thereby improving the recognition accuracy and recognition efficiency of the electromagnetic identification device.

[0042] Optionally, the first direction is horizontal and the second direction is vertical; or, the first direction is vertical and the second direction is horizontal.

[0043] In one embodiment, see Figures 1 to 3, the first directional antenna 21 and the second directional antenna 22 are both loop antennas. With such a configuration, the loop-shaped first directional antenna 21 and the second directional antenna 22 can form more overlapping points with each other, so that the multiple groups of identification antennas 20 form a denser identification network, thereby improving the identification accuracy and efficiency of the electromagnetic identification device.

[0044] In one embodiment, see Figures 1 to 3 The operation and processing module 40 includes a circuit board 41, a transmitting switch circuit 42, a receiving switch circuit 43 and an operation and processing chip 44. The circuit board 41 is arranged on the electromagnetic identification board 10; the transmitting switch circuit 42 is electrically connected to the circuit board 41 for transmitting electrical signals; the receiving switch circuit 43 is electrically connected to the circuit board 41 for receiving electrical signals; the operation and processing chip 44 is arranged on the circuit board 41 and is electrically connected to the transmitting switch circuit 42 and the receiving switch circuit 43; the operation and processing chip 44 is used to control the operation of the transmitting switch circuit 42 and the receiving switch circuit 43, and to analyze the received electrical signals.

[0045] In this embodiment, the circuit board 41 of the operation processing module 40 is integrated with a transmitting switch circuit 42, a receiving switch circuit 43 and an operation processing chip 44, so that the transmitting switch circuit 42, the receiving switch circuit 43 and the operation processing chip 44 are electrically connected, and the operation processing chip 44 controls the transmitting switch circuit 42 to transmit an electrical signal, and the operation processing chip 44 controls the receiving switch circuit 43 to receive an electrical signal. The transmitting switch circuit 42 transmits an electrical signal to the operation processing chip 44, and the operation processing chip 44 analyzes the received electrical signal and converts the electrical signal into an electrical signal that can be recognized and utilized by the identification chess piece 30; the identification chess piece 30 converts the received electrical signal and feeds it back to the operation processing chip 44, at which time the operation processing chip 44 can control the receiving switch circuit 43 to receive the electrical signal fed back by the identification chess piece 30, so that the operation processing module 40 can form a complete signal transmission loop with the identification chess piece 30, so that the operation processing module 40 can more easily analyze and locate the position of the identification chess piece 30 on the electromagnetic identification board 10.

[0046] In one embodiment, see Figures 1 to 3 The operation processing module 40 also includes a coil selection circuit 45 disposed between the circuit board 41 and the transmitting switch circuit 42 , and the coil selection circuit 45 is used to select one of the groups of identification antennas 20 .

[0047] Specifically, the operation processing module 40 is further provided with a coil selection circuit 45 connected between the circuit board 41 and the transmitting switch circuit 42, so that the operation processing module 40 can select a group of identification antennas 20 through the coil selection circuit 45, and the operation processing chip 44 sends a PWM wave at a certain frequency. After a period of time, the transmitting switch circuit 42 is turned off. When the receiving switch circuit 43 is turned on, the previous group of identification antennas 20 can still be selected through the coil selection circuit 45, and the analog value is read by the ADC of the operation processing chip 44. In this way, the operation processing module 40 turns on and off each group of identification antennas 20 in turn, including the first direction and the second direction, and finally obtains a group of identification antennas 20 with the strongest signal, and exceeds the threshold, so that the operation processing module 40 determines that the identification chess piece 30 is near the group of identification antennas 20 with the strongest signal, that is, the strength relationship between the multiple groups of identification antennas 20 and the identification chess piece 30 of the operation processing module 40, and calculates the accurate position of the identification chess piece 30 on the electromagnetic identification board 10, and then selects the identification antenna 20 with the strongest strength through the coil selection circuit 45, thereby improving the recognition accuracy of the operation processing module 40.

[0048] In one embodiment, see Figures 1 to 3 The operation processing module 40 also includes a filter circuit 46 disposed between the transmitting switch circuit 42 and the operation processing chip 44. The filter circuit 46 is electrically connected to the operation processing chip 44 and is used to filter the received electrical signal.

[0049] Specifically, the operation and processing module 40 sets a filter circuit 46 between the transmitting switch circuit 42 and the operation and processing chip 44. With this setting, when the identification chess piece 30 feeds back an electrical signal of the same frequency to the receiving switch circuit 43 of the operation and processing module 40, the multiple groups of identification antennas 20 are switched to the receiving mode. After the multiple groups of identification antennas 20 forward the received electrical signal to the receiving switch circuit 43 of the operation and processing module 40, the operation and processing chip 44 of the operation and processing module 40 can control the filter circuit 46 to filter the received electrical signal, which helps to eliminate unnecessary noise in the electrical signal and improve the frequency of the electrical signal, so that the operation and processing chip 44 can obtain an electrical signal with a more accurate frequency, thereby improving the accuracy of the operation and processing module 40.

[0050] In one embodiment, see Figures 1 to 3 The operation processing module 40 also includes an amplifier circuit 47 disposed between the filter circuit 46 and the operation processing chip 44. The amplifier circuit 47 is electrically connected to the operation processing chip 44 and is used to amplify the electrical signal received by the receiving switch circuit 43.

[0051] Specifically, the operation processing module 40 sets an amplifier circuit 47 between the filter circuit 46 and the operation processing chip 44. With this setting, when the identification chess piece 30 feeds back an electrical signal of the same frequency to the receiving switch circuit 43 of the operation processing module 40, the operation processing chip 44 of the operation processing module 40 can control the amplifier circuit 47 to amplify the received electrical signal. The amplified electrical signal is more easily eliminated by the filter circuit 46, and the frequency of the electrical signal is further improved, so that the operation processing chip 44 obtains an electrical signal with a more precise frequency, thereby improving the accuracy of the operation processing module 40.

[0052] In one embodiment, see Figures 1 to 3 The operation processing module 40 also includes an integration circuit 48 disposed between the amplifier circuit 47 and the operation processing chip 44. The integration circuit 48 is electrically connected to the operation processing chip 44 and is used to integrate the signal amplified by the amplifier circuit 47 to obtain a DC signal.

[0053] Specifically, the operation processing module 40 sets an integration circuit 48 between the amplifier circuit 47 and the operation processing chip 44. With this configuration, when the identification chess piece 30 feeds back an electrical signal of the same frequency to the receiving switch circuit 43 of the operation processing module 40, the operation processing chip 44 of the operation processing module 40 can integrate the received electrical signal by controlling the integration circuit 48. The function of the integration circuit 48 is to accumulate tiny deviation signals and output a reminder when the set value is reached. It is used to eliminate errors in the self-control principle, so that the operation processing chip 44 can obtain an electrical signal with a more accurate frequency, thereby improving the accuracy of the operation processing module 40.

[0054] In one embodiment, see Figures 1 to 3 The oscillation circuit 31 includes at least two oscillation parts 311 , which are arranged at intervals and are used to detect and identify the rotation angle of the chess piece 30 .

[0055] An oscillating circuit 31 consisting of two oscillating parts 311 is installed simultaneously in the second inner cavity of the identification piece 30. With this arrangement, when the identification piece 30 is identified at a specific position by the operation and processing module 40, when the user drives the identification piece 30 to move on the electromagnetic identification board 10, the operation and processing module 40 can identify the rotation angle through the two oscillating parts 311 of the identification piece 30, thereby further improving the recognition accuracy of the operation and processing module 40.

[0056] Optionally, the number of the oscillating parts 311 is not limited to two, but may be three or more, and the multiple oscillating parts 311 may be arranged in a straight line, a curve, or a polygon.

[0057] In one embodiment, see Figures 1 to 3The electromagnetic identification device also includes a display screen arranged on the electromagnetic identification board 10, and the display screen is electrically connected to the operation processing module 40 for displaying the electrical signal sent by the operation processing module 40.

[0058] Specifically, a display screen is set at a position separated from the arrangement area of ​​the electromagnetic identification board 10 and the multiple groups of identification antennas 20, and the display screen is electrically connected to the operation and processing module 40. The display screen is used to display the electrical signal sent by the operation and processing module 40. The electrical signal includes an electrical signal of the position of the identification chess piece 30 placed on the electromagnetic identification board 10 and an electrical signal of the type of the identification chess piece 30. This allows the user to more conveniently learn the position of the identification chess piece 30 on the electromagnetic identification board 10, which is beneficial for the electromagnetic identification device to provide better prompts, guidance, AI game and other functions.

[0059] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An electromagnetic identification device, applied to educational toys, characterized in that: The electromagnetic identification device comprises: An electromagnetic identification board, wherein the electromagnetic identification board is provided with a calculation processing module and a plurality of groups of identification antennas electrically connected to the calculation processing module, wherein the plurality of groups of identification antennas are arranged at intervals; and A plurality of identification chess pieces, the plurality of identification chess pieces are used to be placed on the electromagnetic identification board, each of the identification chess pieces is provided with an oscillating circuit, and the oscillating circuit is connected to the plurality of identification antenna signals; The operation processing module is used to transmit or receive an electrical signal, so that the identification chess piece located on the electromagnetic identification board resonates and is fed back to the operation processing module, so that the operation processing module obtains the position of the identification chess piece on the electromagnetic identification board; The oscillation circuit includes at least two oscillation parts, which are arranged at intervals and are used to detect the rotation angle of the identification chess piece.

2. The electromagnetic identification device according to claim 1, characterized in that: Each group of identification antennas includes: at least one first directional antenna, the first directional antenna being disposed on the electromagnetic identification board and extending along a direction of the electromagnetic identification board; and At least one second directional antenna, the second directional antenna is arranged on the electromagnetic identification board and extends along another direction of the electromagnetic identification board; the first directional antenna and the second directional antenna are arranged at an angle, and the first directional antenna and the second directional antenna are arranged to partially overlap.

3. The electromagnetic identification device according to claim 2, characterized in that: The first directional antenna and the second directional antenna are both loop antennas.

4. The electromagnetic identification device according to claim 1, characterized in that: The operation processing module includes: A circuit board, wherein the circuit board is arranged on the electromagnetic identification board; A transmitting switch circuit, the transmitting switch circuit is electrically connected to the circuit board and is used to transmit an electrical signal; a receiving switch circuit, the receiving switch circuit being electrically connected to the circuit board and configured to receive an electrical signal; and An operation processing chip is arranged on the circuit board and is electrically connected to the transmitting switch circuit and the receiving switch circuit board; the operation processing chip is used to control the operation of the transmitting switch circuit and the receiving switch circuit, and is used to analyze the received electrical signal.

5. The electromagnetic identification device according to claim 4, characterized in that: The operation processing module further includes a coil selection circuit disposed between the circuit board and the transmitting switch circuit, and the coil selection circuit is used to select one of the groups of the identification antennas.

6. The electromagnetic identification device according to claim 5, characterized in that: The operation processing module further includes a filter circuit disposed between the transmitting switch circuit and the operation processing chip. The filter circuit is electrically connected to the operation processing chip and is used for filtering the received electrical signal.

7. The electromagnetic identification device according to claim 6, characterized in that: The operation processing module also includes an amplifier circuit disposed between the filter circuit and the operation processing chip. The amplifier circuit is electrically connected to the operation processing chip and is used to amplify the electrical signal received by the receiving switch circuit.

8. The electromagnetic identification device according to claim 7, characterized in that: The operation processing module also includes an integration circuit arranged between the amplifier circuit and the operation processing chip. The integration circuit is electrically connected to the operation processing chip and is used to integrate the signal amplified by the amplifier circuit to obtain a DC signal.

9. The electromagnetic identification device according to claim 1, characterized in that: The electromagnetic identification device also includes a display screen arranged on the electromagnetic identification board, and the display screen is electrically connected to the operation processing module and is used to display the electrical signal sent by the operation processing module.

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