Multi-channel hyperthermia therapy machine

Abstract

The utility model relates to health physiotherapy equipment technical field discloses a kind of hyperthermia therapy machines with multiple independent temperature and intermediate frequency modulation, including the main control module for output at least one way PWM control signal and trigger signal, intermediate frequency modulation module, power output module and multiple independent temperature control module, the output end of multiple temperature acquisition subcircuit is connected with the analog-digital conversion input end of main control module respectively, for temperature signal is fed back to main control module;The input end of multiple power drive subcircuit is connected with the pulse width modulation output end of main control module, for receiving PWM control signal, the output end of multiple power drive subcircuit is respectively connected with the interface of heating element;Main control module adjusts the duty cycle of PWM control signal according to the temperature signal of feedback, to correspond to regulate the power output of multiple power drive subcircuit.

Description

Technical Field

[0001] This utility model relates to the field of health therapy equipment technology, and more specifically, to a multi-channel thermotherapy machine. Background Technology

[0002] Currently, most physiotherapy devices on the market have limited functionality, supporting only single-channel temperature control or a single medium-frequency electrotherapy mode, failing to meet the need for simultaneous treatment of multiple areas. Traditional thermotherapy devices typically have limited energy output ports, shallow penetration, and limited therapeutic effects. Furthermore, existing devices also lack precision in temperature control, waveform diversity, and user interaction, making it difficult to achieve personalized, multi-channel independent control treatment needs.

[0003] Although some multi-channel physiotherapy devices exist, they are complex in structure, expensive, and prone to interference between channels, affecting the stability and safety of treatment.

[0004] Therefore, it is necessary to provide a new type of hyperthermia treatment machine with a reasonable structure, precise control, and support for multiple independent temperatures and intermediate frequency modulation, so as to improve the treatment effect and user experience. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a hyperthermia therapy machine that supports multiple independent temperatures and has medium frequency modulation, which addresses the shortcomings of existing multi-channel physiotherapy devices, such as complex structure, high cost, and easy interference between channels, affecting the stability and safety of treatment.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct a multi-channel hyperthermia treatment machine, including a housing and a main control circuit board disposed within the housing, wherein the main control circuit board includes at least: The main control module is used to output at least one PWM control signal and trigger signal; An intermediate frequency modulation module, whose input terminal is connected to the output terminal of the main control module, is used to receive the PWM control signal and generate an intermediate frequency waveform signal accordingly based on the PWM control signal; The power output module has one input terminal connected to the output terminal of the main control module for receiving a trigger signal, which is used to control the operation of the power output module. Another input terminal of the power output module is connected to the output terminal of the intermediate frequency modulation module for receiving the intermediate frequency waveform signal. The intermediate frequency waveform signal is amplified by power and then output through the output interface. A multi-channel independent temperature control module, which includes a multi-channel temperature acquisition sub-circuit for acquiring temperature signals and a multi-channel power drive sub-circuit. The output terminals of the multi-channel temperature acquisition sub-circuit are respectively connected to the analog-to-digital conversion input terminals of the main control module, and are used to feed back the temperature signal to the main control module; The input terminal of the multi-channel power drive sub-circuit is connected to the pulse width modulation output terminal of the main control module, and is used to receive the PWM control signal. The output terminals of the multi-channel power drive sub-circuit are respectively connected to the interface of the heating element; The main control module adjusts the duty cycle of the PWM control signal based on the feedback temperature signal to correspondingly regulate the power output of the multi-channel power drive sub-circuit.

[0007] In some embodiments, the intermediate frequency modulation module includes at least a digital-to-analog converter. The input terminal of the digital-to-analog converter is connected to the output terminal of the main control module, and is used to receive the PWM control signal and generate an intermediate frequency waveform signal according to the PWM control signal. The output terminal of the digital-to-analog converter is connected to the other input terminal of the power output module.

[0008] In some embodiments, the power output module includes at least a power amplifier, one input terminal of which is connected to the output terminal of the digital-to-analog converter for receiving the intermediate frequency waveform signal. The other input terminal of the power amplifier is connected to the output terminal of the main control module, and is used to receive the trigger signal. The output terminals of the power amplifier are connected to the ports of the electrode patches.

[0009] In some implementations, the main control module can control each temperature control channel through an independent PWM control signal, and can independently receive and process feedback signals from each multi-channel temperature acquisition sub-circuit.

[0010] In some embodiments, each channel of the multi-channel temperature acquisition sub-circuit includes at least one thermistor interface and at least one voltage divider resistor. The thermistor interface and the voltage divider resistor are connected in series between the +5V power supply and ground, and their voltage divider nodes are respectively connected to the analog-to-digital conversion input terminal of the main control module.

[0011] In some implementations, the multi-channel independent temperature control module supports at least six independent temperature control channels.

[0012] In some embodiments, each of the multiple power drive sub-circuits includes at least one MOS transistor and at least one gate drive resistor; The gates of the MOS transistors are connected to the pulse width modulation output terminals of the main control module. The source of the MOS transistor is connected to the interface of the heating element. The drain of the MOS transistor is connected to the common terminal.

[0013] In some embodiments, a power supply module is also included, which includes at least a dual operational amplifier circuit and a negative voltage generation circuit; The dual operational amplifier circuit is used to convert the input voltage into a positive voltage to power the main control module and the intermediate frequency modulation module. The negative voltage generation circuit is used to convert the positive voltage into a negative voltage to power the dual operational amplifier circuit.

[0014] In the multi-channel hyperthermia treatment machine described in this utility model, by cooperating with the main control module through multiple independent temperature control modules, millisecond-level real-time adjustment of the heating temperature of each channel and temperature control accuracy of ±0.5℃ or even higher can be achieved, avoiding the problem of large temperature fluctuations in traditional equipment and ensuring the accuracy and effectiveness of the hyperthermia dosage. By cooperating with the main control module, the intermediate frequency modulation module can adjust the intermediate frequency signal output, ensuring that the intermediate frequency waveform is not distorted, the output is stable, and the energy is sufficient, which significantly improves the comfort and efficacy of electrotherapy. Each temperature control channel has its own independent signal acquisition path, control signal, and power switch. From the signal source to the power output, each channel is physically and electrically isolated. This structure can solve the technical problems common in multi-channel equipment, such as "power grabbing" between channels, crosstalk, and uneven temperature control, ensuring that the six channels can work stably at different target temperatures and heating powers at the same time, achieving true "multi-channel independence". Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a perspective view of an embodiment of the multi-channel hyperthermia treatment machine provided by this utility model; Figure 2 This is an exploded view of an embodiment of the multi-channel hyperthermia treatment machine provided by this utility model; Figure 3 This is a circuit schematic diagram of an embodiment of the dual operational amplifier circuit and intermediate frequency modulation module provided by this utility model; Figure 4 This is a circuit diagram of an embodiment of the power output module provided by this utility model; Figure 5 This is a circuit schematic diagram of an embodiment of the main control module provided by this utility model; Figure 6 This is a circuit diagram of an embodiment of the multi-channel independent temperature control module provided by this utility model; Figure 7This is a circuit diagram of an embodiment of the voltage conversion module and reset module provided by this utility model. Detailed Implementation

[0016] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-2 As shown, in the first embodiment of the multi-channel hyperthermia therapy machine of this utility model, the multi-channel hyperthermia therapy machine 10 includes a shell 101 with a hollow structure 101a. A main control circuit board (110-180) is provided inside the hollow structure 101a of the housing 101, and a touch screen 102 is provided at the upper end of the housing 101. Specifically, housing 101 is used to carry the main control circuit board (110-180). Among them, such as Figures 3-7 As shown, the main control circuit board (110-180) includes at least a power supply module (110, 180), an intermediate frequency modulation module 120, a power output module 130, a main control module 140, a multi-channel independent temperature control module 150, a voltage conversion module 160, and a reset module 170. The power supply modules (110, 180) are used to convert the input voltage signal and output +5V and -5V voltage signals respectively. The intermediate frequency modulation module 120 is used to receive PWM control signals or digital commands input from the main control module 140, and generate control intermediate frequency waveform signals according to the command signals. The power output module 130 is used to modulate and amplify the intermediate frequency analog waveform generated by the intermediate frequency modulation module 120 in order to drive the handpiece to produce an intermediate frequency electrotherapy effect. The main control module 140 has the functions of logic operation, signal reception / processing, and output of multiple PWM control signals and trigger signals; The multi-channel independent temperature control module 150 is used to monitor and control the temperature signals and switching functions of the 6 heating elements, and feeds them back to the main control module 140. Then, the duty cycle of the multi-channel PWM control signals is adjusted according to the feedback temperature signals. The voltage conversion module 160 is used to switch the voltage values ​​at both ends; The reset module 170 is used to ensure that the main control module 140 is restored to a determined initial state when it starts up or malfunctions, so as to avoid disorder or erroneous operation. Specifically, the main control module 140 is used to output at least one PWM control signal and trigger signal; The input terminal of the intermediate frequency modulation module 120 is connected to the output terminal of the main control module 140. It is used to receive PWM control signals, generate intermediate frequency waveform signals according to the PWM control signals, and then output them to the power output module 130. One input terminal of the power output module 130 is connected to the output terminal of the main control module 140 to receive a trigger signal. The input trigger signal is used to control the operating state of the power output module 130. The other input terminal of the power output module 130 is connected to the output terminal of the intermediate frequency modulation module 120. It is used to receive the intermediate frequency waveform signal, amplify the power of the input intermediate frequency waveform signal, and then output it through the output interface (OUTA+, OUTA-) to act on a specific area of ​​the human body. For example, the main control module 140 consists of a microcontroller unit (MCU) and its minimum system circuit. Although the main control module 140 is not shown in detail in the figure, its functions are reflected by the network labels that are distributed throughout the figure, such as A_DB0~A_DB7, A_WR, A_CS, TEMP_AD_1~TEMP_AD_6, HOT_1~HOT_6, etc. These labels all point to the corresponding functional pins of the main control module 140. The main control module 140 acts as the system brain, performing the following functions: receiving user commands via the touchscreen; generating intermediate frequency waveform digital data and controlling the intermediate frequency modulation module 120; reading multiple ADC temperature values; running temperature control algorithms; generating multiple PWM pulse signals to control heating power; and managing system status and timing.

[0018] The main control module 140 is connected to the corresponding pins (DB0-DB7, WR, CS) of the intermediate frequency modulation module 120 via the data bus (A_DB0 to A_DB7), write control line (A_WR), and chip select line (A_CS). The reference voltage pin VREF A of the intermediate frequency modulation module 120 is connected to a high-precision reference source, and its channel A analog output terminal OUT A outputs an analog voltage signal (A7528_OUT). The output of the intermediate frequency modulation module 120 is coupled to an input terminal INP (corresponding to pin 4) of the power output module 130 through the tenth capacitor C10 and the twelfth resistor R12, thereby configuring the gain; The power output module 130 is powered by V+12V. Its output terminals VOP (corresponding to pin 5) and VON (corresponding to pin 7) are directly connected to the output interface OUTA+ and OUTA- for driving the handle. The shutdown control pin SD (corresponding to pin 1) of the power output module 130 is controlled by the signal A_9112_SD of the main control module 140.

[0019] The main control module 140 sends waveform data to the intermediate frequency modulation module 120 via the digital bus. The intermediate frequency modulation module 120 converts the digital signal into the corresponding analog intermediate frequency waveform signal. The analog intermediate frequency waveform signal is blocked by the tenth capacitor C10 and then sent to the power output module 130 for power amplification. The power output module 130 outputs in BTL mode, thereby providing sufficient power to the load at a lower supply voltage, ultimately generating a modulated waveform for intermediate frequency electrotherapy.

[0020] Furthermore, the multi-channel independent temperature control module 150 includes a multi-channel temperature acquisition sub-circuit 151 for acquiring temperature signals and a multi-channel power drive sub-circuit 152. The output of the multi-channel temperature acquisition sub-circuit 151 is connected to the analog-to-digital conversion input terminals (TEMP_AD_1 to TEMP_AD_6) of the main control module 140, respectively, and is used to feed back the acquired temperature signals to the main control module 140. The input terminal of the multi-channel power drive sub-circuit 152 is connected to the pulse width modulation output terminals (HOT_1 to HOT_6) of the main control module 140, and is used to receive at least one PWM control signal. The output terminals of the multi-channel power drive sub-circuit 152 are respectively connected to the interfaces (H1-H6) of the heating elements; The main control module 140 can adjust the duty cycle of the PWM control signal according to the feedback temperature signal, so as to regulate the power output of the multi-channel power drive sub-circuit 152.

[0021] Specifically, such as Figure 6 As shown, one end of the external thermistor T1 of the multi-channel temperature acquisition sub-circuit 151 is connected to V+5V, and the other end is connected in series with the twenty-fifth resistor R25 to the common terminal GND. The voltage divider node (network label TEMP_AD_1) between thermistor T1 and the twenty-fifth resistor R25 is directly connected to the ADC input pin of the main control module 140. The sixteenth capacitor C16 is connected in parallel between TEMP_AD_1 and ground for filtering and anti-interference. One branch of the multi-channel power drive sub-circuit 152 is connected to the gate of the N-channel MOSFET Q2 via the PWM control signal (HOT_1) generated by the main control module 140 through the 27th resistor R27. The source of the MOSFET Q2 is connected to the common terminal, and the drain of the MOSFET Q2 is connected to the heating element interface H1. A 28th resistor R28 is also connected between the gate and the source to ensure that the MOSFET Q2 is in the off state during MCU initialization. Temperature acquisition process: The resistance of thermistor T1 changes with temperature, causing the voltage of the voltage divider node TEMP_AD_1 to change. The main control module 140 periodically reads the ADC voltage value and calculates the real-time temperature. Temperature control process: like Figure 6 As shown, the main control module 140 compares the real-time temperature with the set target temperature, runs the PID control algorithm, and dynamically adjusts the duty cycle of the PWM of the output signal HOT_1. The PWM control signal drives the MOSFET Q2 through the 27th resistor R27. The larger the PWM duty cycle, the longer the MOSFET Q2 conducts in one cycle, and the greater the average power obtained by the external heating element (connected between H1 and the power supply), thereby increasing the temperature. Through this closed-loop feedback control, independent and precise control of the temperature of each channel is achieved.

[0022] Using this technical solution, by combining multiple independent temperature control modules with the main control module, it is possible to achieve millisecond-level real-time adjustment of the heating temperature of each channel and temperature control accuracy of ±0.5℃ or even higher, avoiding the problem of large temperature fluctuations in traditional equipment and ensuring the accuracy and effectiveness of the thermotherapy dosage. By cooperating with the main control module, the intermediate frequency modulation module can adjust the intermediate frequency signal output, ensuring that the intermediate frequency waveform is not distorted, the output is stable, and the energy is sufficient, which significantly improves the comfort and efficacy of electrotherapy. Each temperature control channel has its own independent signal acquisition path, control signal, and power switch. From the signal source to the power output, each channel is physically and electrically isolated. This structure can solve the technical problems common in multi-channel equipment, such as "power grabbing" between channels, crosstalk, and uneven temperature control, ensuring that the six channels can work stably at different target temperatures and heating powers at the same time, achieving true "multi-channel independence".

[0023] In some implementations, such as Figure 3 As shown, in order to output a stable intermediate frequency waveform signal, a digital-to-analog converter U4 can be set in the intermediate frequency modulation module 120, which has digital-to-analog conversion and corresponding output analog intermediate frequency voltage signal; Specifically, the input terminal (pin 4) of the digital-to-analog converter U4 is connected to the output terminal (pin 59) of the main control module 140 through the sixth capacitor C6, which is used to receive the PWM control signal input by the main control module 140 and generate an intermediate frequency waveform signal according to the PWM control signal. The output terminal (corresponding to pin 19) of the digital-to-analog converter U4 is connected to another input terminal (corresponding to pin 4) of the power output module 130 through the series-connected tenth capacitor C10 and twelfth resistor R12, which is used to input the intermediate frequency waveform signal into the power output module 130.

[0024] In some implementations, such as Figure 4 As shown, to improve the amplification effect of the intermediate frequency waveform signal output, a power amplifier U3 can be set in the power output module 130, which has the function of signal amplification. Specifically, one input terminal (corresponding to pin 4) of the power amplifier U3 is connected to the output terminal (corresponding to pin 19) of the digital-to-analog converter U4 through the series-connected tenth capacitor C10 and twelfth resistor R12, which is used to receive the intermediate frequency waveform signal and amplify the input intermediate frequency waveform signal; The other input terminal (corresponding to pin 1) of power amplifier U3 is connected to the output terminal (corresponding to pin 45) of main control module 140 through the fifth resistor R5. This connection is used to receive trigger signals, which are used to control the operating state of power amplifier U3. One output terminal (corresponding to pin 8) of power amplifier U3 is connected to one end of the first inductor L1, the other end of the first inductor L1 is connected to one input terminal (corresponding to pin 2) of transformer T1, and one output terminal (corresponding to pin 10) of transformer T1 is connected to one end of the electrode patch. The other output terminal of power amplifier U3 (corresponding to pin 5) is connected to one end of the second inductor L2. The other end of the second inductor L2 is connected to the other input terminal of transformer T1 (corresponding to pin 4). The other output terminal of transformer T1 (corresponding to pin 7) is connected to the other port of the electrode patch through the rectifier bridge (D1-D4). Among them, a fourth capacitor C4 and an eighth capacitor C8 are connected in series between the other end of the first inductor L1 and the other end of the second inductor L2. Specifically, the analog signal (or intermediate frequency waveform signal) from the channel (A7528_2IN) of the digital-to-analog converter U4 enters the input terminal (INN) of the power amplifier U3. Power amplifier U3 amplifies the input intermediate frequency waveform signal to a sufficient power level. The BTL structure can provide a larger voltage swing than a normal single-ended output under single power supply, thus obtaining greater output power on the load (handle). The amplified intermediate frequency waveform signal is output from VOP and VON, coupled to the interface through transformer T1, and then connected to the external handle electrode.

[0025] like Figure 4 As shown, the trigger signal (A_9112_SD) comes from the shutdown control signal of the main control module 140 and can be used to control the switching state of the power amplifier U3.

[0026] In some implementations, such as Figure 5As shown, the main control module 140 includes at least one MCU controller U7, which can control each temperature control channel (corresponding to TEMP_AD1-TEMP_AD6) through independent PWM control signals, and can independently receive and process the feedback signals of each multi-channel temperature acquisition sub-circuit 151 to adjust the duty cycle of the PWM control signal accordingly.

[0027] In some implementations, such as Figure 6 As shown, each channel of the multi-channel temperature acquisition sub-circuit 151 includes at least one thermistor interface (T1-T6) and at least one voltage divider resistor (R25, R29, R33, R37, R41, R45). Each thermistor interface (T1-T6) is connected in series with a voltage divider resistor between the +5V power supply and ground. Its voltage divider nodes (TEMP_AD_1 to TEMP_AD_6) are connected to the analog-to-digital conversion input terminals (pins 21-26) of the MCU controller U7 (belonging to the main control module 140) to feed back the acquired temperature signal to the main control module 140.

[0028] In some implementations, such as Figure 6 As shown, the multi-channel independent temperature control module 150 supports at least six independent temperature control channels (corresponding to HOT_1-HOT_6).

[0029] In some implementations, such as Figure 6 As shown, each of the multiple power drive sub-circuits 152 includes at least one MOSFET (Q2-Q7) and a gate drive resistor (R27-R47). The gates of the MOSFETs (Q2-Q7) are connected to the pulse width modulation output terminals (HOT_1 to HOT_6) of the MCU controller U7 (belonging to the main control module 140), respectively, to receive multiple PWM control signals input from the MCU controller U7 (belonging to the main control module 140). The sources of the MOSFETs (Q2-Q7) are connected to the interfaces (H1-H6) of the heating element. The drains of the MOSFETs (Q2-Q7) are connected to the common terminal. The on / off state of the MOSFETs (Q2-Q7) is controlled by the input PWM control signal to output the heat therapy signal.

[0030] Specifically, temperature acquisition (feedback loop): Each external thermistor (e.g., T1) and the fixed resistor on the board (e.g., R25) form a voltage divider circuit. The voltage TEMP_AD_1 at the voltage divider point will change with temperature (due to changes in the thermistor resistance). The analog voltage is fed into the ADC pin of the MCU controller U7, which converts it into a digital value and calculates the current actual temperature using an algorithm. Temperature control (execution loop): The MCU controller U7 compares the actual temperature it reads with the target temperature set by the user. Based on the difference, the MCU controller U7 controls the on and off of the corresponding channel's MOSFET (such as HOT_1 controlling Q2) through PWM control signals (pulse width modulation). For example, a PWM control signal drives the MOSFET Q7 through a gate resistor (such as R47). The larger the duty cycle of the PWM control signal, the longer the MOSFET Q7 is turned on in one cycle, the greater the average power obtained by the heating element (H6), and the faster the temperature rises. The MCU controller U7 continuously executes closed-loop control (usually a PID algorithm) of "reading temperature -> calculating difference -> adjusting PWM duty cycle" to eventually stabilize the temperature at the set value.

[0031] In some implementations, such as Figure 1 and Figure 7 As shown, it also includes power modules (110 and 180), wherein the power modules include at least a dual operational amplifier circuit 110 and a negative voltage generation circuit 180; The dual operational amplifier circuit 110 is used to convert the input voltage into a positive voltage of +5V to power the MCU controller U7 (belonging to the main control module 140) and the digital-to-analog converter U4 (intermediate frequency modulation module 120); The negative voltage generation circuit 180 is used to convert the positive voltage into a negative voltage of -5V to power the dual operational amplifier circuit 110.

[0032] In some implementations, such as Figure 7 As shown, the voltage conversion module 160 includes at least transistors Q8 and Q9. The base of transistor Q8 is connected to the 3.3V power supply terminal through resistor R59, and the collector of transistor Q8 is connected to an external terminal (corresponding to TXD2). The emitter of transistor Q8 is connected to one end of MCU controller U7 (corresponding to pin 16) through resistor R62 (sixty-second resistor). The voltage between the emitter and collector is switched by controlling the on / off state of transistor Q8. The base of transistor Q9 is connected to the 3.3V power supply terminal through resistor R64 (number 64), and the collector of transistor Q9 is connected to an external terminal (corresponding to RXD2). The emitter of transistor Q9 is connected to one end of MCU controller U7 (corresponding to pin 17) through resistor R63 (the sixty-third resistor). The voltage between the emitter and collector is switched by controlling the on / off state of transistor Q9.

[0033] In some implementations, such as Figure 7 As shown, the reset module 170 includes a sixty-first resistor R61 and a thirty-first capacitor C1 connected in series. The connection terminals of the sixty-first resistor R61 and the thirty-first capacitor C1 are connected to the reset terminal (corresponding to pin 7) of the MCU controller U7. One end of resistor R61 (the sixty-first resistor) is connected to one end of MCU controller U7 (corresponding to pin 64). One end of capacitor C1 (the 31st capacitor) is connected to the common terminal.

[0034] Specifically, such as Figure 6 As shown, the touch screen 102 allows selection of two modes: medium frequency and heat therapy. Different shaped handles are connected through the output channel to act on complex areas of the human body. The heat therapy has 6 independent control channels (H1-H6). The thermotherapy temperature can be adjusted from 37℃ to 50℃, and the treatment time can be adjusted from 0 to 60 minutes. The actual temperature and remaining treatment time are displayed in real time. There are 6 different medium-frequency modulation waves, each with a different effect. They can be used in combination, and the stimulation intensity and time of the waveform can be adjusted by touch.

[0035] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-channel hyperthermia treatment machine, comprising a housing and a main control circuit board disposed within the housing, characterized in that, The main control circuit board includes at least: The main control module is used to output at least one PWM control signal and trigger signal; An intermediate frequency modulation module, whose input terminal is connected to the output terminal of the main control module, is used to receive the PWM control signal and generate an intermediate frequency waveform signal accordingly based on the PWM control signal; The power output module has one input terminal connected to the output terminal of the main control module for receiving a trigger signal, which is used to control the operation of the power output module. Another input terminal of the power output module is connected to the output terminal of the intermediate frequency modulation module for receiving the intermediate frequency waveform signal. The intermediate frequency waveform signal is amplified by power and then output through the output interface. A multi-channel independent temperature control module, which includes a multi-channel temperature acquisition sub-circuit for acquiring temperature signals and a multi-channel power drive sub-circuit; The output terminals of the multi-channel temperature acquisition sub-circuit are respectively connected to the analog-to-digital conversion input terminals of the main control module, and are used to feed back the temperature signal to the main control module; The input terminal of the multi-channel power drive sub-circuit is connected to the pulse width modulation output terminal of the main control module, and is used to receive the PWM control signal. The output terminals of the multi-channel power drive sub-circuit are respectively connected to the interface of the heating element; The main control module adjusts the duty cycle of the PWM control signal according to the feedback temperature signal, so as to regulate the power output of the multi-channel power drive sub-circuit.

2. The multi-channel hyperthermia treatment machine according to claim 1, characterized in that, The intermediate frequency modulation module includes at least one digital-to-analog converter. The input terminal of the digital-to-analog converter is connected to the output terminal of the main control module, and is used to receive the PWM control signal and generate an intermediate frequency waveform signal according to the PWM control signal. The output terminal of the digital-to-analog converter is connected to the other input terminal of the power output module.

3. The multi-channel hyperthermia treatment machine according to claim 2, characterized in that, The power output module includes at least one power amplifier, one input terminal of which is connected to the output terminal of the digital-to-analog converter for receiving the intermediate frequency waveform signal. The other input terminal of the power amplifier is connected to the output terminal of the main control module, and is used to receive the trigger signal. The output terminals of the power amplifier are connected to the ports of the electrode patches.

4. The multi-channel hyperthermia treatment machine according to claim 1, characterized in that, The main control module can control each temperature control channel through the independent PWM control signal, and can independently receive and process the feedback signals of each multi-channel temperature acquisition sub-circuit.

5. The multi-channel hyperthermia treatment machine according to claim 4, characterized in that, Each of the multiple temperature acquisition sub-circuits includes at least one thermistor interface and at least one voltage divider resistor. The thermistor interface and the voltage divider resistor are connected in series between the +5V power supply and ground, and their voltage divider nodes are respectively connected to the analog-to-digital conversion input terminal of the main control module.

6. The multi-channel hyperthermia treatment machine according to any one of claims 1-5, characterized in that, The multi-channel independent temperature control module supports at least six independent temperature control channels.

7. The multi-channel hyperthermia treatment machine according to claim 6, characterized in that, Each of the multiple power drive sub-circuits includes at least one MOS transistor and at least one gate drive resistor. The gates of the MOS transistors are connected to the pulse width modulation output terminals of the main control module. The source of the MOS transistor is connected to the interface of the heating element. The drain of the MOS transistor is connected to the common terminal.

8. The multi-channel hyperthermia treatment machine according to any one of claims 1-5, characterized in that, It also includes a power supply module, which includes at least a dual operational amplifier circuit and a negative voltage generation circuit; The dual operational amplifier circuit is used to convert the input voltage into a positive voltage to power the main control module and the intermediate frequency modulation module. The negative voltage generation circuit is used to convert the positive voltage into a negative voltage to power the dual operational amplifier circuit.

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