An ultrasonic physiotherapy guide head drive control circuit and double-frequency single guide head

Abstract

The utility model relates to health physiotherapy equipment technical field discloses a kind of ultrasonic physiotherapy guide head drive control circuit and double-frequency single guide head, with: main control module (110), it is used to output at least one road PWM control signal;Ultrasonic drive module (120) according to the level state of PWM control signal to drive ultrasonic transducer piece to work at 1MHz or 3MHz frequency, to form ultrasonic channel;Temperature detection module (130) is used to the temperature signal collected feedback to main control module (110), and main control module (110) adjusts the duty cycle of PWM control signal according to the temperature signal of feedback, to control ultrasonic drive module (120) control the temperature output by ultrasonic channel.

Description

Technical Field

[0001] This utility model relates to the field of health therapy equipment technology, and more specifically, to an ultrasonic therapy guide head drive control circuit and a dual-frequency single guide head. Background Technology

[0002] Most commonly used ultrasound therapy devices on the market currently employ a single frequency output, such as 1MHz or 3MHz, which cannot flexibly switch frequencies according to treatment needs, thus limiting their application range in treating tissues at different depths. Furthermore, existing devices are prone to overheating during prolonged use due to the ultrasonic transducer heating up, posing a risk of burns. The lack of an effective temperature control protection mechanism affects the safety and comfort of use.

[0003] Although some ultrasound devices have attempted to introduce multi-frequency output or temperature monitoring functions, their structures are complex and costly, and they often fail to achieve true dual-frequency free switching and intelligent temperature control integrated design, still resulting in problems such as inconvenience in use and low reliability. Utility Model Content

[0004] The technical problem to be solved by this utility model is that, in view of the above-mentioned existing technology, which does not achieve true dual-frequency free switching and intelligent temperature control integrated design, there are still defects such as inconvenience in use and low reliability. This utility model provides an ultrasonic physiotherapy guide head drive control circuit and a dual-frequency single guide head with dual-frequency output and temperature control protection functions.

[0005] The technical solution adopted by this utility model to solve its technical problem is: constructing an ultrasonic physiotherapy guide head drive control circuit, which has the following features: The main control module, which is configured within the control circuit, is used to output at least one PWM control signal; An ultrasonic drive module has its input terminal connected to a signal output terminal of the main control module for receiving the PWM control signal. The input PWM control signal is used to control the operating state of the ultrasonic drive module. The output of the ultrasonic drive module is connected to one end of the ultrasonic transducer, and drives the ultrasonic transducer to work at a frequency of 1MHz or 3MHz according to the level of the PWM control signal to form an ultrasonic channel. The temperature detection module has its input terminal used to acquire the temperature signal generated by each of the ultrasonic channels during operation. The output of the temperature detection module is connected to the feedback of the main control module, and is used to feed back the collected temperature signal to the main control module. The main control module adjusts the duty cycle of the PWM control signal based on the feedback temperature signal, so as to control the ultrasonic drive module to control the temperature output of the ultrasonic channel.

[0006] In some embodiments, the ultrasonic driving module includes at least a first half-bridge driving circuit and a second half-bridge driving circuit. The input terminal of the first half-bridge drive circuit is connected to a signal output terminal of the main control module to receive a PWM control signal. The input PWM control signal is used to control the operating state of the first half-bridge drive circuit. The input terminal of the second half-bridge drive circuit is connected to another signal output terminal of the main control module to receive another PWM control signal. This other PWM control signal is used to control the operating state of the second half-bridge drive circuit. The output terminals of the first half-bridge drive circuit and the second half-bridge drive circuit are connected to one end of the ultrasonic transducer, and drive the ultrasonic transducer to operate at a frequency of 1MHz or 3MHz according to the level state of the PWM control signal to form at least one ultrasonic channel.

[0007] In some embodiments, the first half-bridge drive circuit includes a first AND gate circuit, a first drive circuit, and a first power output circuit. An input terminal of the first AND gate is connected to an output terminal of the main control module to receive a PWM control signal. One input terminal of the first driving circuit is connected to the output terminal of the first AND gate circuit. An input terminal of the first power output circuit is connected to the output terminal of the first drive circuit. The first driving circuit outputs at least one trigger signal to control the working state of the first power output circuit, thereby forming at least one ultrasonic channel.

[0008] In some embodiments, the second half-bridge drive circuit includes a second AND gate circuit, a second drive circuit, and a second power output circuit. One input terminal of the second AND gate is connected to the other output terminal of the main control module, for receiving another PWM control signal. One input terminal of the second driving circuit is connected to the output terminal of the second AND gate circuit. One input terminal of the second power output circuit is connected to the output terminal of the second drive circuit. The second driving circuit outputs at least one trigger signal to control the working state of the second power output circuit, thereby forming at least one ultrasonic channel.

[0009] In some embodiments, the first power output circuit includes at least a first MOSFET and a second MOSFET. The gate of the first MOSFET is connected to an output terminal of the first driving circuit to receive a first trigger signal. The gate of the second MOSFET is connected to another output terminal of the first driving circuit to receive the second trigger signal. The drain of the first MOSFET is connected to the power supply terminal. The source of the first MOS transistor and the drain of the second MOS transistor are connected to the input terminal of a corresponding ultrasonic transducer. The source of the second MOSFET is connected to the common terminal.

[0010] In some embodiments, the second power output circuit includes at least a third MOSFET and a fourth MOSFET. The gate of the third MOS transistor is connected to an output terminal of the second driving circuit to receive a third trigger signal. The gate of the fourth MOS transistor is connected to another output terminal of the second driving circuit to receive the fourth trigger signal. The drain of the third MOS transistor is connected to the power supply terminal. The source of the third MOS transistor and the drain of the fourth MOS transistor are connected to the input terminal of a corresponding ultrasonic transducer. The source of the fourth MOS transistor is connected to the common terminal.

[0011] In some embodiments, the ultrasonic drive module further includes a power supply circuit, the input of which is connected to a 3.3V power supply. The output terminal of the power supply circuit is connected to the input terminals of the first half-bridge drive circuit and the second half-bridge drive circuit, respectively.

[0012] Secondly, a dual-frequency single-guide head includes a housing for an internal hollow structure and an ultrasonic transducer and an alloy induction head disposed at the end of the housing. The ultrasonic therapy head drive control circuit described above is disposed within the hollow structure of the housing.

[0013] In the ultrasonic therapy guide head drive control circuit described in this utility model, the main control module outputs multiple PWM control signals of different frequencies. After the PWM control signals are voltage-boosted and shaped by the ultrasonic drive module, their working state is precisely controlled. This can efficiently generate the high-power, high-frequency AC signal required to drive the ultrasonic transducer, effectively solving the defect of conventional equipment with fixed ultrasonic frequency that cannot be freely adjusted to expand the treatment range. Among them, the 1MHz frequency penetrates deeply and acts on deep tissues; the 3MHz frequency penetrates shallowly but has high precision and acts on superficial treatments. One circuit provides two treatment modes, greatly expanding the application range of the equipment. On the other hand, the temperature detection module (such as an NTC thermistor attached near the transducer) converts the physical quantity of temperature into an electrical signal and feeds it directly back to the (analog-to-digital conversion) interface of the main control module. The built-in program of the main control module can determine whether the temperature exceeds the limit in real time, thereby solving the safety problem of the lack of temperature control protection and the risk of burns in the existing technology. Attached Figure Description

[0014] 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 dual-frequency single-guide head provided by this utility model; Figure 2 This is an exploded view of an embodiment of the dual-frequency single-guide head provided by this utility model; Figure 3 This is a circuit schematic diagram of an embodiment of the main control module provided by this utility model; Figure 4 This is a circuit schematic diagram of an embodiment of the half-bridge drive module and power output module provided by this utility model; Figure 5 This is a circuit diagram of an embodiment of the temperature detection module provided by this utility model. Detailed Implementation

[0015] 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.

[0016] like Figures 1-5 As shown, in the first embodiment of the dual-frequency single-guide head of this utility model, the dual-frequency single-guide head 10 includes a shell 102 with a hollow structure. A control circuit (110-140) is installed inside the hollow structure of the housing 102, and an ultrasonic transducer 105 and an alloy sensing head 106 are stacked at the upper end of the housing 102. Specifically, the housing 102 is used to carry the ultrasonic therapy guide head drive control circuit (110-140). The ultrasonic therapy head drive control circuit (110-140) includes at least a main control module 110, an ultrasonic drive module 120, and a temperature detection module 130. Among them, the main control module 110 is the core of the drive control circuit, which has the functions of calculation, signal reception, processing and output of multiple PWM control signals; The ultrasonic drive module 120 has the functions of boosting / shaping and driving; The temperature detection module 130 has the function of temperature detection and feedback; Specifically, the main control module 110 is configured in the control circuit to output at least one PWM control signal and receive a temperature signal, and can adjust the duty cycle of the output PWM control signal according to the feedback temperature signal; Furthermore, the input terminal of the ultrasonic drive module 120 is connected to a signal output terminal of the main control module 110, for receiving at least one PWM control signal. The input PWM control signal is used to control the operating state of the ultrasonic drive module 120. The output of the ultrasonic drive module 120 is connected to one end of the ultrasonic transducer 105, and drives the ultrasonic transducer 105 to work at a frequency of 1MHz or 3MHz according to the level of the PWM control signal, so as to form at least one ultrasonic channel to act on complex areas of the human body. Furthermore, the input terminal of the temperature detection module 130 is used to acquire the temperature signal generated by each ultrasonic channel during operation. The output terminal of the temperature detection module 130 is connected to the feedback terminal of the main control module 110, and is used to feed back the collected temperature signal to the main control module 110. The main control module 110 adjusts the duty cycle of the output PWM control signal according to the feedback temperature signal, so as to control the ultrasonic drive module 120 to control the temperature output of the ultrasonic channel.

[0017] Using this technical solution, the main control module 110 outputs multiple PWM control signals of different frequencies. After the ultrasonic drive module 120 performs voltage boosting and shaping on these PWM control signals, it precisely controls the working state, efficiently generating the high-power, high-frequency AC signals required to drive the ultrasonic transducer. This effectively solves the problem of conventional equipment having a fixed ultrasonic frequency that cannot be freely adjusted to expand the treatment range. Specifically, the 1MHz frequency penetrates deeply and acts on deep tissues, while the 3MHz frequency penetrates shallowly but has high precision and is used for superficial treatment. One circuit provides two treatment modes, greatly expanding the application range of the equipment. On the other hand, the temperature detection module 130 (such as an NTC thermistor attached near the transducer) converts the physical quantity of temperature into an electrical signal and feeds it directly back to the (analog-to-digital conversion) interface of the main control module 110. The built-in program of the main control module 110 can determine whether the temperature exceeds the limit in real time, thereby solving the safety problem of the lack of temperature control protection and the risk of burns in the existing technology.

[0018] In some implementations, such as Figure 4 As shown, to ensure the reliability of the output ultrasonic signal, the ultrasonic drive module 120 includes at least a first half-bridge drive circuit 122 and a second half-bridge drive circuit 123. The first half-bridge drive circuit 122 is used to output at least one trigger signal. The second half-bridge drive circuit 123 is used to output at least one trigger signal; Specifically, the signal input terminal (corresponding to P27) of the first half-bridge drive circuit 122 is connected to an output terminal (corresponding to pin 28) of the main control module 110, and is used to receive a PWM control signal output by the main control module 110. The input PWM control signal is used to control the working state of the first half-bridge drive circuit 122 to form at least one ultrasonic channel. Furthermore, the signal input terminal of the second half-bridge drive circuit 123 is connected to another output terminal of the main control module 110 to receive another PWM control signal. The other PWM control signal is used to control the working state of the second half-bridge drive circuit 123.

[0019] The output terminals of the first half-bridge drive circuit 122 and the second half-bridge drive circuit 123 are connected to one end of the ultrasonic transducer, and drive the ultrasonic transducer 105 to work at a frequency of 1MHz or 3MHz according to the level state of the PWM control signal, so as to form at least one ultrasonic channel to act on complex areas of the human body.

[0020] In some implementations, such as Figure 4 As shown, to ensure the reliability of the output ultrasonic signal, a first AND gate circuit 122a, a first drive circuit 122b, and a first power output circuit 122c can be provided in the first half-bridge drive circuit 122. The first AND gate circuit 122a has multiple input terminals and one output terminal. The output is high when all inputs are high at the same time; otherwise, the output is low. The first driving circuit 122b is used to output at least one trigger signal; The first power output circuit 122c has the functions of switching and signal transmission; Specifically, an input terminal (corresponding to pin P27) of the first AND gate circuit 122a is connected to an output terminal (corresponding to pin 28) of the main control module 110, for receiving a PWM control signal. An input terminal of the first driving circuit 122b is connected to the output terminal of the first AND gate circuit 122a, and is used to receive a PWM control signal output by the first AND gate circuit 122a, and to correspond to at least one trigger signal according to the input PWM control signal. An input terminal of the first power output circuit 122c is connected to the output terminal of the first drive circuit 122b. The output terminal of the first power output circuit 122c is connected to one end of the ultrasonic transducer 105. The ultrasonic transducer 105 is driven to work at a frequency of 1MHz or 3MHz according to the level of the trigger signal, so as to form at least one ultrasonic channel to act on complex areas of the human body.

[0021] In some implementations, such as Figure 4As shown, to ensure the reliability of the output ultrasonic signal, a second AND gate circuit 123a, a second drive circuit 123b, and a second power output circuit 123c can be configured in the second half-bridge drive circuit 123. The second AND gate circuit 123a has multiple input terminals and one output terminal. The output is high when all inputs are high at the same time; otherwise, the output is low. The second drive circuit 123b is used to output at least one trigger signal; The second power output circuit 123c serves as a switch and signal transmission circuit. Specifically, one input terminal (corresponding to P26) of the second AND gate circuit 123a is connected to the other output terminal (corresponding to pin 27) of the main control module 110, and is used to receive another PWM control signal. One input terminal of the second driving circuit 123b is connected to the output terminal of the second AND gate circuit 123a, and is used to receive another PWM control signal output by the second driving circuit 123b, and to generate at least one trigger signal according to the other input PWM control signal. One input terminal of the second power output circuit 123c is connected to the output terminal of the second drive circuit 123b. The second drive circuit 123b outputs at least one trigger signal to control the working state of the second power output circuit 123c. The output terminal of the second power output circuit 123c is connected to one end of the ultrasonic transducer 105. The second power output circuit 123c drives the ultrasonic transducer 105 to work at a frequency of 1MHz or 3MHz according to the level of the trigger signal, so as to form at least one ultrasonic channel to act on complex areas of the human body.

[0022] In some implementations, such as Figure 4 As shown, in order to ensure the stability of the ultrasonic channel on / off state, a first MOSFET Q3 and a second MOSFET Q4 can be set in the first power output circuit 122c. The first MOSFET Q3 and the second MOSFET are selected as N-channel enhancement-mode MOSFETs, both of which have the function of switching. Specifically, the gate of the first MOSFET Q3 is connected to an output terminal (corresponding to pin 3) of the first driving circuit 122b through the twenty-first resistor R21, for receiving the first trigger signal. The gate of the second MOSFET Q4 is connected to another output terminal (corresponding to pin 8) of the first drive circuit 122b through the twenty-third resistor R23, and is used to receive the second trigger signal. The drain of the first MOSFET Q3 is connected to the power supply terminal (corresponding to +ADJ-OUT) to receive voltage signals; The source of the first MOSFET Q3 and the drain of the second MOSFET Q4 are connected to the input terminal of a corresponding ultrasonic transducer 105 via a series-connected thirty-first capacitor C31 and a third inductor L3, serving as the output terminal of the first switching circuit 122c. The source of the second MOSFET Q4 is connected to the common terminal.

[0023] That is, when the first trigger signal is high, the second trigger signal is low, so as to control the first MOSFET Q3 and the second MOSFET Q4 to conduct alternately. Conversely, when the second trigger signal is high, the first trigger signal is low, so as to trigger either the first MOSFET Q3 or the second MOSFET Q4 to conduct, and the other MOSFET to turn off, thus forming at least one ultrasonic channel.

[0024] In some implementations, such as Figure 4 As shown, the second switching circuit 123c includes at least a third MOSFET Q5 and a fourth MOSFET Q6, wherein the third MOSFET Q5 and the fourth MOSFET Q6 are selected as N-channel enhancement-mode MOSFETs, and both have the function of switching; Specifically, the gate of the third MOSFET Q5 is connected to an output terminal (corresponding to pin 3) of the second drive circuit 123b through the twenty-sixth resistor R26, for receiving the third trigger signal. The gate of the fourth MOSFET Q6 is connected to another output terminal (corresponding to pin 8) of the second drive circuit 123b through the twenty-eighth resistor R28, and is used to receive the fourth trigger signal. The drain of the third MOSFET Q5 is connected to the power supply terminal (corresponding to +ADJ-OUT) to receive voltage signals; The source of the third MOSFET Q5 and the drain of the fourth MOSFET Q6 are connected to the input terminal of the corresponding ultrasonic transducer 105 via a series-connected fortieth capacitor C40 and fourth inductor L4, serving as the output terminal of the second switching circuit 123c. The source of the fourth MOSFET Q6 is connected to the common terminal.

[0025] Specifically, the first MOSFET Q3 to the fourth MOSFET Q6 form a dual-channel synchronous Buck converter. The main control microcontroller U101 has a PWM frequency of 20kHz and an adjustable duty cycle of 0–95%. It can sample the output voltage through an RC filter network, compare it with the set value, and then adjust the duty cycle in a closed loop to achieve continuous adjustment from 0–24V. The third output inductor L3 and the fourth output inductor L4 are 22μH, and the output capacitors are 2×470μF / 35V solid capacitors with ripple ≤50Mv.

[0026] In some implementations, such as Figure 4As shown, the ultrasonic drive module 120 also includes a power supply circuit 121, which is connected to the output terminal of the pre-amplifier power supply module and is used to receive a +3.3V voltage signal. The pre-amplifier power supply module can process the input voltage in stages, such as 48 V → 12 V → 5 V → 3.3 V, stepping down the voltage stage by stage. Each stage has independent feedback to ensure high efficiency and low ripple. The first output terminal (corresponding to pin 10) of the power supply circuit 121 is connected to the other input terminal (corresponding to pin 9) of the first AND gate circuit 122a and the other input terminal (corresponding to pin 5) of the second AND gate circuit 123a. The second output terminal (corresponding to pin 9) of the power supply circuit 121 is connected to the third input terminal (corresponding to pin 10) of the first AND gate circuit 122a and the third input terminal (corresponding to pin 2) of the second AND gate circuit 123a, respectively, to receive the voltage signal output by the power supply circuit 121 and provide trigger voltage for the first AND gate circuit 122a and the second AND gate circuit 123a.

[0027] In some implementations, such as Figure 5 As shown, the temperature detection module 130 includes a fifty-first resistor R51 and a sixty-fourth capacitor C64 connected in series. The connection terminals of the fifty-first resistor R51 and the sixty-fourth capacitor C64 are connected to the temperature control terminal (P14-1) to acquire the temperature signal of the alloy sensing head 106. The connection terminal of the fifty-first resistor R51 and the sixty-fourth capacitor C64 (corresponding to P00) is also connected to the feedback terminal (corresponding to pin 29) of the main control module 110, which is used to feed back the acquired temperature signal to the main control module 110. It can adjust the duty cycle of the output PWM control signal according to the feedback temperature signal to control the temperature output of the ultrasonic channel controlled by the ultrasonic drive module 120. Among them, the other end of the fifty-first resistor R51 is connected to the +5V power supply terminal, and the other end of the sixty-fourth capacitor C64 is connected to the common terminal.

[0028] Secondly, such as Figure 1 and Figure 2 As shown, a dual-frequency single-guide head 10 includes a housing 102 for an internal hollow structure, and a rubber outer shell 101 is provided on the outer extension of the housing 102. Among them, a lamp plate 103, a light-transmitting ring 104, an ultrasonic transducer 105 and an alloy sensor head 106 are stacked at the end of the housing 102. Among them, any ultrasonic therapy guide head drive control circuit (110-140) is installed inside the ultrasonic device or in the hollow structure of the housing 102.

[0029] 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 drive control circuit for an ultrasonic physiotherapy guide head, characterized in that, have: The main control module, which is configured within the control circuit, is used to output at least one PWM control signal; An ultrasonic drive module has its input terminal connected to a signal output terminal of the main control module for receiving the PWM control signal. The input PWM control signal is used to control the operating state of the ultrasonic drive module. The output of the ultrasonic drive module is connected to one end of the ultrasonic transducer, and drives the ultrasonic transducer to work at a frequency of 1MHz or 3MHz according to the level of the PWM control signal to form an ultrasonic channel. The temperature detection module has its input terminal used to acquire the temperature signal generated by each of the ultrasonic channels during operation. The output of the temperature detection module is connected to the feedback of the main control module, and is used to feed back the collected temperature signal to the main control module. The main control module adjusts the duty cycle of the PWM control signal based on the feedback temperature signal, so as to control the ultrasonic drive module to control the temperature output of the ultrasonic channel.

2. The ultrasonic therapy guide head drive control circuit according to claim 1, characterized in that, The ultrasonic driving module includes at least a first half-bridge driving circuit and a second half-bridge driving circuit. The input terminal of the first half-bridge drive circuit is connected to a signal output terminal of the main control module to receive a PWM control signal. The input PWM control signal is used to control the operating state of the first half-bridge drive circuit. The input terminal of the second half-bridge drive circuit is connected to another signal output terminal of the main control module to receive another PWM control signal. This other PWM control signal is used to control the operating state of the second half-bridge drive circuit. The output terminals of the first half-bridge drive circuit and the second half-bridge drive circuit are connected to one end of the ultrasonic transducer, and drive the ultrasonic transducer to operate at a frequency of 1MHz or 3MHz according to the level state of the PWM control signal to form at least one ultrasonic channel.

3. The ultrasonic therapy guide head drive control circuit according to claim 2, characterized in that, The first half-bridge drive circuit includes a first AND gate circuit, a first drive circuit, and a first power output circuit. An input terminal of the first AND gate is connected to an output terminal of the main control module to receive a PWM control signal. One input terminal of the first driving circuit is connected to the output terminal of the first AND gate circuit. An input terminal of the first power output circuit is connected to the output terminal of the first drive circuit. The first driving circuit outputs at least one trigger signal to control the working state of the first power output circuit, thereby forming at least one ultrasonic channel.

4. The ultrasonic therapy guide head drive control circuit according to claim 2, characterized in that, The second half-bridge drive circuit includes a second AND gate circuit, a second drive circuit, and a second power output circuit. One input terminal of the second AND gate is connected to the other output terminal of the main control module, for receiving another PWM control signal. One input terminal of the second driving circuit is connected to the output terminal of the second AND gate circuit. One input terminal of the second power output circuit is connected to the output terminal of the second drive circuit. The second driving circuit outputs at least one trigger signal to control the working state of the second power output circuit, thereby forming at least one ultrasonic channel.

5. The ultrasonic therapy guide head drive control circuit according to claim 3, characterized in that, The first power output circuit includes at least a first MOSFET and a second MOSFET. The gate of the first MOSFET is connected to an output terminal of the first driving circuit to receive a first trigger signal. The gate of the second MOSFET is connected to another output terminal of the first driving circuit to receive the second trigger signal. The drain of the first MOSFET is connected to the power supply terminal. The source of the first MOS transistor and the drain of the second MOS transistor are connected to the input terminal of a corresponding ultrasonic transducer. The source of the second MOSFET is connected to the common terminal.

6. The ultrasonic therapy guide head drive control circuit according to claim 4, characterized in that, The second power output circuit includes at least a third MOSFET and a fourth MOSFET. The gate of the third MOS transistor is connected to an output terminal of the second driving circuit to receive a third trigger signal. The gate of the fourth MOS transistor is connected to another output terminal of the second driving circuit to receive the fourth trigger signal. The drain of the third MOS transistor is connected to the power supply terminal. The source of the third MOS transistor and the drain of the fourth MOS transistor are connected to the input terminal of a corresponding ultrasonic transducer. The source of the fourth MOS transistor is connected to the common terminal.

7. The ultrasonic therapy guide head drive control circuit according to claim 4, characterized in that, The ultrasonic drive module also includes a power supply circuit, the input terminal of which is connected to a 3.3V power supply terminal. The output terminal of the power supply circuit is connected to the input terminals of the first half-bridge drive circuit and the second half-bridge drive circuit, respectively.

8. A dual-frequency single-guide head, characterized in that, It includes a housing for the hollow structure and an ultrasonic transducer and an alloy induction head disposed at the end of the housing. The ultrasonic therapy guide head drive control circuit according to any one of claims 1 to 7 is provided within the hollow structure of the housing.

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