A multi-treatment head coil identification module for a magnetic stimulation device

Abstract

This utility model relates to a multi-treatment head coil identification module for a magnetic stimulation device, including a treatment head coil. The treatment head coil includes a housing and a coil, and an RFID tag is set on the housing. The RFID tag is used to store the coil type and electrical parameters. A main controller is connected to an RFID reading module, which is communicatively connected to the main controller. The RFID reading module is used to wirelessly read the content stored in the RFID tag and transmit the read data to the main controller. The main controller is connected to a full-bridge drive circuit, and the output of the full-bridge drive circuit is connected to an LLC resonant circuit. The output of the LLC resonant circuit is connected to a SCR circuit, which is connected to the treatment head coil. This utility model incorporates an RFID reading module within the magnetic stimulation device. When the treatment head coil approaches the RFID reading module, the RFID reading module reads the type and electrical parameters of the treatment head coil and transmits them to the main controller. The main controller then controls the drive circuit to adjust the output intensity to match the treatment head coil.

Description

Technical Field

[0001] This utility model relates to the field of magnetic stimulation therapy device technology, specifically to a multi-treatment head coil identification module for magnetic stimulation devices. Background Technology

[0002] Currently, there are various types of treatment heads available for magnetic stimulation devices on the market. Different coils have different functions and parameters, such as circular, figure-eight shaped, and biconical coils. The magnetic field penetration depth and focusing accuracy need to be adjusted for different areas to achieve treatment of various sites. If you change them hastily, it may cause the device to malfunction or the coil to overheat abnormally, posing a safety hazard.

[0003] Existing identification methods use a limited set of codes (≤31 types) to identify coil types. For example, CN115364376A discloses a pulse magnetic shaping instrument and its automatic identification method, system, control method, and circuit, which pre-stores the coil type and reads it after connecting the coil. The lack of pre-programming makes it difficult to adapt new treatment heads.

[0004] Therefore, it is urgent to achieve intelligent identification of coils through digital tag technology. Summary of the Invention

[0005] To address the problem of existing magnetic stimulation devices being unable to recognize new treatment heads, thus causing compatibility difficulties, a multi-treatment head coil identification module for magnetic stimulation devices is proposed. An RFID tag is placed on the treatment head coil, and the type and electrical parameters of the treatment head coil are written into the RFID tag. An RFID reading module is installed inside the magnetic stimulation device. When the treatment head coil approaches the RFID reading module, the RFID reading module reads the type and electrical parameters of the treatment head coil and transmits them to the main controller. The main controller then controls the drive circuit to adjust the output intensity to match the treatment head coil.

[0006] To achieve the above objectives, this utility model proposes a multi-treatment head coil identification module for a magnetic stimulation device, including a magnetic stimulation device. The magnetic stimulation device includes a housing, a main controller, a drive circuit, and multiple types of treatment head coils. The output terminal of the drive circuit is connected to one of the treatment head coils. The controller controls the output intensity of the drive circuit according to the type of treatment head coil. The treatment head coil includes a housing and a coil. An RFID tag is provided on the housing. The RFID tag includes a sticker and a metal tag. The sticker and metal tag are fixed. The sticker is adhered to the housing. The RFID tag is used to store the coil type and electrical parameters.

[0007] The main controller is connected to an RFID reading module, which is communicatively connected to the main controller. The RFID reading module is located inside the housing and is used to wirelessly read the stored content of RFID tags and transmit the read data to the main controller.

[0008] The driving circuit includes a rectifier circuit, a full-bridge driving circuit, an LLC resonant circuit, and a thyristor circuit. The main controller is connected to the full-bridge driving circuit. The output of the full-bridge driving circuit is connected to the LLC resonant circuit. The output of the LLC resonant circuit is connected to the thyristor circuit. The thyristor circuit is connected to the treatment head coil.

[0009] Furthermore, an isolation layer is provided on the bottom surface of the metal label. The area of ​​the isolation layer is larger than the area of ​​the metal label and smaller than the area of ​​the sticker. The isolation layer and the metal label are bonded and fixed together.

[0010] The isolation layer is a ferrite isolation layer. This isolation layer is used to prevent interference with the metal tag and to protect it.

[0011] Furthermore, the RFID reading module is located near the edge of the housing, and the RFID reading module includes an RFID chip, which communicates with the main controller via an I2C serial port.

[0012] The embedded structure facilitates the integration of the RFID reading module into the circuitry of the magnetic stimulation device, making it easy to modify.

[0013] Furthermore, the rectifier circuit includes a rectifier bridge composed of four diodes D1 to D4. The rectifier circuit is connected to 220V AC mains power. The other end of the rectifier circuit is connected to a filter capacitor C1. The anodes of D1 and D2 are connected to the live wire, the anodes of D3 and D4 are connected to the neutral wire, the cathodes of D1 and D3 are connected to the positive terminal of the filter capacitor C1, and D2 and D4 are connected to the negative terminal of the filter capacitor C1.

[0014] The filter capacitor C1 is connected to the full-bridge drive circuit, which includes four MOSFETs Q1 to Q4. The sources of Q1 and Q3 are connected to the drains of Q2 and Q4, the drains of Q1 and Q3 are connected to the positive terminal of the filter capacitor C1, and the sources of Q2 and Q4 are connected to the negative terminal of the filter capacitor C1.

[0015] The LLC resonant circuit includes a resonant inductor Lr, a resonant capacitor Cr, and a transformer T. The resonant inductor Lr is connected to the midpoint of Q1 and Q2. The other end of the resonant inductor Lr is connected in series with the resonant capacitor Cr. The resonant capacitor Cr is connected to the primary winding of the transformer T. The other end of the primary winding of the transformer T is connected to the midpoint of Q3 and Q4. The secondary winding of the transformer T is connected to a rectifier diode, and a filter capacitor C2 is connected through the rectifier diode.

[0016] The thyristor circuit includes a thyristor, the anode of which is connected to a filter capacitor C2, the cathode of which is connected to a treatment head coil, and the other end of the treatment head coil is connected to the negative terminal of an LLC resonant circuit.

[0017] The drive circuit can meet the driving requirements of various treatment head coils.

[0018] Furthermore, the output terminal of the main controller is connected to an optocoupler unit, and the output terminal of the optocoupler unit is connected to the gate of the thyristor;

[0019] The PWM1 and PWM2 output terminals of the main controller are connected to an IR2110 chip, and the output terminals of the IR2110 chip are respectively connected to the gates of Q1 to Q4.

[0020] It enables the adjustment of the output of the drive circuit according to the electrical parameters of the treatment head coil, so that the output is compatible with the electrical phase of various types of treatment head coils.

[0021] The beneficial effects of this utility model through the above technical solution are as follows:

[0022] This invention enables wireless reading of coil type and electrical parameters, and allows for adjustment of the drive circuit output to match the current treatment head coil based on these electrical parameters. An RFID reading module integrated into the housing wirelessly reads the RFID tag on the treatment head coil housing, eliminating the need for physical contact or plugging / unplugging. This avoids the wear and poor contact problems associated with traditional contact-based identification, improving equipment reliability and ease of operation, and is particularly suitable for rapid replacement needs in medical settings. The RFID tag stores the coil type and electrical parameters, automatically identifying the currently connected treatment head coil upon power-up, eliminating the need for manual pre-input or parameter matching, reducing operational errors, and enhancing intelligence. When replacing different types of coils, the system can switch the corresponding drive strategy in real time, achieving "plug and play." Based on the read coil parameters, the main controller precisely adjusts the MOS transistor switching logic and SCR conduction angle of the full-bridge drive circuit through optocouplers and IR2110 chips, combined with frequency matching of the LLC resonant circuit, dynamically adapting the drive circuit output strength, waveform, and coil electrical characteristics. This ensures stable operation for coils of different specifications, broadening the equipment's compatibility range and improving the flexibility and effectiveness of treatment plans. Attached Figure Description

[0023] Figure 1 This is one of the circuit diagrams for a multi-treatment head coil identification module for a magnetic stimulation device according to this utility model;

[0024] Figure 2 This is the second circuit diagram of a multi-treatment head coil identification module for a magnetic stimulation device according to this utility model;

[0025] Figure 3 This is a schematic diagram of the RFID tag structure of a multi-treatment head coil identification module for a magnetic stimulation device according to this utility model.

[0026] Reference numerals: 1. Main controller; 2. Treatment head coil; 3. RFID tag; 301. Sticker; 302. Metal tag; 4. RFID reading module; 5. Rectifier circuit; 6. Full-bridge drive circuit; 7. LLC resonant circuit; 8. Thyristor circuit; 9. Isolation layer; 10. Optocoupler unit; 11. IR2110 chip. Detailed Implementation

[0027] Example 1

[0028] like Figures 1-3 As shown, a multi-treatment head coil identification module for a magnetic stimulation device includes a magnetic stimulation device, which includes a housing, a main controller 1, a drive circuit, and multiple types of treatment head coils 2. The output terminal of the drive circuit is connected to one of the treatment head coils 2. The controller controls the output intensity of the drive circuit according to the type of treatment head coil 2. The treatment head coil 2 includes a housing and a coil. An RFID tag 3 is provided on the housing. The RFID tag 3 includes a sticker 301 and a metal tag 302. The sticker 301 and the metal tag 302 are fixed. The sticker 301 is adhered to the housing. The RFID tag 3 is used to store the coil type and electrical parameters.

[0029] The main controller 1 is connected to an RFID reading module 4, which is communicatively connected to the main controller 1. The RFID reading module 4 is located inside the housing and is used to wirelessly read the stored content of the RFID tag 3 and transmit the read data to the main controller 1.

[0030] The driving circuit includes a rectifier circuit 5, a full-bridge driving circuit 6, an LLC resonant circuit 7, and a thyristor circuit 8. The main controller 1 is connected to the full-bridge driving circuit 6. The output of the full-bridge driving circuit 6 is connected to the LLC resonant circuit 7. The output of the LLC resonant circuit 7 is connected to the thyristor circuit 8. The thyristor circuit 8 is connected to the treatment head coil 2.

[0031] The bottom surface of the metal label 302 is provided with an isolation layer 9. The area of ​​the isolation layer 9 is larger than the area of ​​the metal label 302 and smaller than the area of ​​the sticker 301. The isolation layer 9 and the metal label 302 are bonded and fixed together.

[0032] The RFID reading module 4 is located near the edge of the outer casing. The RFID reading module 4 includes an RFID chip, and the RFID chip and the main controller 1 communicate via an I2C serial port.

[0033] The rectifier circuit 5 includes a rectifier bridge composed of four diodes D1 to D4. The rectifier circuit 5 is connected to a 220V mains power supply. The other end of the rectifier circuit 5 is connected to a filter capacitor C1. The anodes of D1 and D2 are connected to the live wire, the anodes of D3 and D4 are connected to the neutral wire, the cathodes of D1 and D3 are connected to the positive terminal of the filter capacitor C1, and D2 and D4 are connected to the negative terminal of the filter capacitor C1.

[0034] The filter capacitor C1 is connected to the full-bridge drive circuit 6, which includes four MOS transistors Q1 to Q4. The sources of Q1 and Q3 are connected to the drains of Q2 and Q4, the drains of Q1 and Q3 are connected to the positive terminal of the filter capacitor C1, and the sources of Q2 and Q4 are connected to the negative terminal of the filter capacitor C1.

[0035] The LLC resonant circuit 7 includes a resonant inductor Lr, a resonant capacitor Cr, and a transformer T. The resonant inductor Lr is connected to the midpoint of Q1 and Q2. The other end of the resonant inductor Lr is connected in series with the resonant capacitor Cr. The resonant capacitor Cr is connected to the primary winding of the transformer T. The other end of the primary winding of the transformer T is connected to the midpoint of Q3 and Q4. The secondary winding of the transformer T is connected to a rectifier diode, and a filter capacitor C2 is connected through the rectifier diode.

[0036] The thyristor circuit 8 includes a thyristor, the anode of which is connected to a filter capacitor C2, the cathode of which is connected to a treatment head coil 2, and the other end of the treatment head coil 2 is connected to the negative terminal of an LLC resonant circuit 7.

[0037] The output terminal of the main controller 1 is connected to an optocoupler unit 10, and the output terminal of the optocoupler unit 10 is connected to the gate of the thyristor.

[0038] The PWM1 and PWM2 output terminals of the main controller 1 are connected to the IR2110 chip 11, and the output terminals of the IR2110 chip 11 are respectively connected to the gates of Q1 to Q4.

[0039] In this embodiment, the main controller 1 uses an STM32 microcontroller and is used to output PWM signals. Two IR2110 chips 11 are used, each controlling Q1 to Q4 respectively. Figure 1-2 As shown. RFID reading module 4 uses the RC522 RFID reader.

[0040] When replacing the treatment head coil 2 of the magnetic stimulation device, when the treatment head coil 2 with the RFID tag 3 attached is brought close to the magnetic stimulation device, the RFID reading module 4 reads the coil type and electrical parameters written in the RFID tag 3. The RFID reading module 4 transmits the stored coil type and electrical parameters to the main controller 1. After receiving the data, the main controller 1 performs the following process to achieve RFID reading and output matching: When a new treatment head coil 2 is connected to the device, the RFID tag 3 (including sticker 301 and metal tag 302) on its shell enters the sensing range of the RFID reading module 4 inside the shell. The bottom isolation layer 9 avoids interference from the metal shell, allowing the RFID chip to transmit the stored coil type and electrical parameters to the main controller 1 via the I2C serial port. After receiving the data, the main controller 1 analyzes the parameters based on a preset algorithm and sends control signals to the IR2110 chip 11 through the PWM1 / PWM2 ports to adjust the switching frequency and duty cycle of the MOS transistors Q1~Q4 in the full-bridge drive circuit 6. At the same time, the conduction angle of the thyristor circuit 8 is adjusted through the optocoupler unit 10 to match the resonant frequency of the LLC resonant circuit 7 with the inductance characteristics of the treatment head coil 2. Finally, the drive circuit outputs a current intensity adapted to the coil parameters, achieving mutual adaptation. This ensures that different types of treatment heads can receive accurate drive.

[0041] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A multi-treatment head coil identification module for a magnetic stimulation device, comprising a magnetic stimulation device, the magnetic stimulation device including a housing, a main controller (1), a drive circuit, and multiple types of treatment head coils (2), wherein the output terminal of the drive circuit is connected to one of the treatment head coils (2), and the controller controls the output intensity of the drive circuit according to the type of treatment head coil (2), characterized in that, The treatment head coil (2) includes a housing and a coil. An RFID tag (3) is provided on the housing. The RFID tag (3) includes a sticker (301) and a metal tag (302). The sticker (301) and the metal tag (302) are fixed together. The sticker (301) is bonded to the housing. The RFID tag (3) is used to store the coil type and electrical parameters. The main controller (1) is connected to an RFID reading module (4). The RFID reading module (4) is communicatively connected to the main controller (1). The RFID reading module (4) is located inside the housing. The RFID reading module (4) is used to wirelessly read the stored content of the RFID tag (3) and transmit the read data to the main controller (1). The driving circuit includes a rectifier circuit (5), a full-bridge driving circuit (6), an LLC resonant circuit (7), and a thyristor circuit (8). The main controller (1) is connected to the full-bridge driving circuit (6). The output of the full-bridge driving circuit (6) is connected to the LLC resonant circuit (7). The output of the LLC resonant circuit (7) is connected to the thyristor circuit (8). The thyristor circuit (8) is connected to the treatment head coil (2).

2. The multi-treatment head coil identification module for a magnetic stimulation device according to claim 1, characterized in that, The bottom surface of the metal label (302) is provided with an isolation layer (9). The area of ​​the isolation layer (9) is larger than the area of ​​the metal label (302) and smaller than the area of ​​the sticker (301). The isolation layer (9) and the metal label (302) are bonded and fixed together.

3. The multi-treatment head coil identification module for a magnetic stimulation device according to claim 2, characterized in that, The RFID reading module (4) is located near the edge of the outer shell. The RFID reading module (4) includes an RFID chip. The RFID chip and the main controller (1) communicate via an I2C serial port.

4. The multi-treatment head coil identification module for a magnetic stimulation device according to claim 1, characterized in that, The rectifier circuit (5) includes a rectifier bridge composed of four diodes D1~D4. The rectifier circuit (5) is connected to 220V mains power. The other end of the rectifier circuit (5) is connected to a filter capacitor C1. The anodes of D1 and D2 are connected to the live wire, the anodes of D3 and D4 are connected to the neutral wire, the cathodes of D1 and D3 are connected to the positive terminal of the filter capacitor C1, and D2 and D4 are connected to the negative terminal of the filter capacitor C1. The filter capacitor C1 is connected to the full-bridge drive circuit (6). The full-bridge drive circuit (6) includes four MOS transistors Q1 to Q4. The sources of Q1 and Q3 are connected to the drains of Q2 and Q4. The drains of Q1 and Q3 are connected to the positive terminal of the filter capacitor C1. The sources of Q2 and Q4 are connected to the negative terminal of the filter capacitor C1. The LLC resonant circuit (7) includes a resonant inductor Lr, a resonant capacitor Cr, and a transformer T. The resonant inductor Lr is connected to the midpoint of Q1 and Q2. The other end of the resonant inductor Lr is connected in series with the resonant capacitor Cr. The resonant capacitor Cr is connected to the primary winding of the transformer T. The other end of the primary winding of the transformer T is connected to the midpoint of Q3 and Q4. The secondary coil of the transformer T is connected to a rectifier diode, and a filter capacitor C2 is connected through the rectifier diode. The thyristor circuit (8) includes a thyristor, the anode of which is connected to a filter capacitor C2, the cathode of which is connected to a treatment head coil (2), and the other end of the treatment head coil (2) is connected to the negative terminal of an LLC resonant circuit (7).

5. A multi-treatment head coil identification module for a magnetic stimulation device according to claim 4, characterized in that, The output terminal of the main controller (1) is connected to an optocoupler unit (10), and the output terminal of the optocoupler unit (10) is connected to the gate of the thyristor. The PWM1 output terminal and PWM2 output terminal of the main controller (1) are connected to the IR2110 chip (11), and the output terminals of the IR2110 chip (11) are respectively connected to the gates of Q1~Q4.

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