An ultrasonic driving circuit and an ultrasonic therapeutic instrument
By designing a signal source adjustment module and a switching module in the ultrasound therapy device, the signal from the clock source chip is converted into two complementary and symmetrical PWM pulse drive signals, solving the problem that single pulses cannot be applied and realizing the flexibility and low cost of dual-pulse therapy in ultrasound therapy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU YUNSHAN HEALTH IND CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-07-24
AI Technical Summary
The clock source chip in existing ultrasound therapy devices can only generate single pulses, which is not suitable for treatment scenarios that require dual pulses.
An ultrasonic driving circuit was designed, including a signal source adjustment module and a switching module. The clock signal generated by the clock source chip is converted into two complementary and symmetrical PWM pulse driving signals through logic gate circuits, and the corresponding AC signal is generated by the switching module to drive the transducer.
This invention enables the ultrasonic therapy device to be used in dual-pulse therapy scenarios at a lower cost, and ensures that the PWM pulse signals output by the logic gate circuit are synchronized in timing, thus avoiding timing issues.
Smart Images
Figure CN224540818U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment technology, specifically to an ultrasonic drive circuit and an ultrasonic therapy device. Background Technology
[0002] An ultrasound therapy device is a medical instrument that uses ultrasound waves for treatment. A driving signal source drives an ultrasound transducer via a driving circuit. The transducer generates ultrasound waves, which are then transmitted to human tissue through a sound-permeable fluid to achieve the therapeutic purpose. Currently, commonly used ultrasound therapy devices typically use a PLL clock source chip as the driving signal source. However, this clock source chip can only generate single pulses and is unsuitable for treatment scenarios requiring dual pulses. Utility Model Content
[0003] This invention provides an ultrasonic driving circuit and an ultrasonic therapy device, aiming to solve the problem that the clock source chip in current ultrasonic therapy devices can only generate single pulses and cannot be used in treatment scenarios that require dual pulses.
[0004] According to one aspect of the present invention, an ultrasonic driving circuit is provided, applied to an ultrasonic therapy device, and connected between the clock source chip and the transducer of the ultrasonic therapy device, the ultrasonic driving circuit comprising:
[0005] The signal source adjustment module includes logic gate circuits for converting the clock signal generated by the clock source chip into two complementary and symmetrical PWM pulse drive signals.
[0006] A switching module is connected between the output of the logic gate circuit and the transducer, and is used to generate corresponding AC signals according to two complementary and symmetrical PWM pulse drive signals to drive the transducer.
[0007] The further technical solution is as follows: the logic gate circuit includes two XOR gates, one input terminal of each of the two XOR gates is connected to the output terminal of the clock source chip, and the other input terminal of the two XOR gates is connected to the power supply VCC and ground respectively through pull-up circuits and pull-down circuits.
[0008] The further technical solution is as follows: the logic gate circuit includes two XNOR gates, one input terminal of each of the two XNOR gates is connected to the output terminal of the clock source chip, and the other input terminal of the two XNOR gates is connected to the power supply VCC and ground respectively through pull-up circuits and pull-down circuits.
[0009] The further technical solution is as follows: the pull-up circuit includes a pull-up resistor, and the pull-down circuit includes a pull-down resistor.
[0010] A further technical solution is as follows: the ultrasonic driving circuit further includes a half-bridge driving chip, which is connected between the output terminal of the logic gate circuit and the input terminal of the switching module.
[0011] The further technical solution is as follows: the model of the half-bridge driver chip is UCC27524DR.
[0012] The further technical solution is as follows: the switching module includes a first switching transistor, a second switching transistor, and a transformer. The gates of the first and second switching transistors are connected to the output terminals of the logic gate circuit so as to be alternately turned on under the action of two complementary and symmetrical PWM pulse drive signals. The drains of the first and second switching transistors are respectively connected to the two ends of the primary side of the transformer, and their sources are grounded. The secondary side of the transformer is connected to the transducer.
[0013] According to another aspect of the present invention, an ultrasonic therapy device is provided, comprising a control module, a clock source chip, a transducer, and the aforementioned ultrasonic driving circuit, wherein the clock source chip is connected to the control module and is used to generate a clock signal according to instructions from the control module, and the ultrasonic driving circuit is connected between the output terminal of the clock source chip and the transducer.
[0014] Compared with the prior art, the ultrasonic drive circuit of this utility model is equipped with a signal source adjustment module and a switching module. The clock signal generated by the clock source chip in the ultrasonic therapy device can be converted into two complementary symmetrical PWM pulse drive signals through the logic gate circuit in the signal source adjustment module. The switching module can generate corresponding AC signals according to the two complementary symmetrical PWM pulse drive signals to drive the transducer. This makes the ultrasonic therapy device using the ultrasonic drive circuit of this utility model suitable for treatment scenarios using dual pulses. It can be seen that the ultrasonic drive circuit of this utility model can realize the conversion of single pulse signal to two complementary symmetrical PWM pulse drive signals by building the circuit module with separate hardware devices. Moreover, it has low cost and can be flexibly built. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of a specific embodiment of the ultrasonic drive circuit of this utility model.
[0017] Figure 2 This is a schematic diagram of the circuit structure of a specific embodiment of the ultrasonic drive circuit of this utility model.
[0018] Figure 3These are the two PWM pulse drive signals output by the signal source adjustment module of this utility model. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0020] Reference Figures 1 to 2 , Figures 1 to 2 A specific embodiment of the ultrasonic drive circuit 10 of this utility model is shown. The ultrasonic drive circuit 10 of this utility model can be applied to an ultrasonic therapy device and is connected between the clock source chip 20 and the transducer Y1 of the ultrasonic therapy device. In this embodiment, the ultrasonic drive circuit 10 includes a signal source adjustment module 11 and a switching module 12. The signal source adjustment module 11 includes logic gate circuits for converting the clock signal generated by the clock source chip 20 into two complementary symmetrical PWM pulse drive signals. The switching module 12 is connected between the output terminal of the logic gate circuit and the transducer Y1, and is used to generate corresponding AC signals according to the two complementary symmetrical PWM pulse drive signals to drive the transducer Y1. Based on the above design, the clock signal generated by the clock source chip 20 in the ultrasonic therapy device can be converted into two complementary symmetrical PWM pulse drive signals by logic gate circuits built from separate hardware devices. This makes the ultrasonic therapy device using the ultrasonic drive circuit 10 of this utility model applicable to more treatment scenarios, and has a lower cost. It does not need to be integrated into a single chip (e.g., a clock source chip), and each hardware circuit module can be flexibly built according to requirements.
[0021] In this embodiment, the logic gate circuit includes two XOR gates. One input terminal of each XOR gate is connected to the output terminal of the clock source chip 20, and the other input terminals of the two XOR gates are connected to the power supply VCC and ground respectively through pull-up circuits and pull-down circuits. Specifically, the pull-up circuit includes a pull-up resistor R1, and the pull-down circuit includes a pull-down resistor R2.
[0022] Preferably, in this embodiment, the function of two XOR gates is implemented using a 74LS86 XOR gate logic chip U10, such as... Figure 2As shown, pin 1 of the XOR gate logic chip U10 is connected to the power supply VCC through the pull-up resistor R1. Pins 2 and 5 of the XOR gate logic chip U10 are both connected to the output of the clock source chip 20. Pin 4 of the XOR gate logic chip U10 is grounded through the pull-down resistor R2. Pins 3 and 6 serve as the output of the logic gate circuit, respectively outputting two PWM pulse drive signals, such as... Figure 3 As shown, the two output PWM pulse drive signals are complementary and symmetrical. Based on the above design, the high-frequency clock signal is simultaneously input into two XOR gates, and after being modulated by the same circuit architecture, it is output. Therefore, the timing of the two output complementary and symmetrical PWM pulse drive signals is synchronized, and there will be no phase difference.
[0023] Understandably, in some other embodiments, the logic gate circuit can also be implemented using two XNOR gates, i.e., it includes two XNOR gates, with one input terminal of each XNOR gate connected to the output terminal of the clock source chip 20, and the other input terminals of the two XNOR gates connected to the power supply VCC and ground respectively through pull-up circuits and pull-down circuits. The two XNOR gates can also convert the input clock signal into two complementary and symmetrical PWM pulse drive signals.
[0024] In this embodiment, the duty cycle of the two complementary symmetrical PWM pulse drive signals is preferably 50%. Further, in some embodiments, the ultrasonic drive circuit 10 also includes a half-bridge drive chip 13. Preferably, in this embodiment, the half-bridge drive chip 13 is a chip of model UCC27524DR. The two input pins of the half-bridge drive chip 13 are respectively connected to the two output terminals (pins 3 and 6) of the logic gate circuit. The switching module 12 includes a first switch Q1, a second switch Q2 and a transformer T1. The gates of the first switch Q1 and the second switch Q2 are connected to the two output pins (pins 7 and 5) of the half-bridge drive chip 13 so as to be alternately turned on under the action of the two complementary symmetrical PWM pulse drive signals. The drains of the first switch Q1 and the second switch Q2 are respectively connected to the two ends of the primary side of the transformer T1, and their sources are grounded through a resistor. The secondary side of the transformer T1 is connected to the transducer Y1. Based on the above design, two complementary symmetrical PWM pulse drive signals with a duty cycle of 50% drive the first switch Q1 and the second switch Q2 respectively after passing through the half-bridge driver chip 13, which can prevent the two switches from being turned on at the same time. The half-bridge driver chip 13 will realize the protection function of driving the half-bridge MOS transistor by controlling the dead time. The first switch Q1 and the second switch Q2 are turned on alternately to generate alternating current. The generated alternating current passes through the primary side of transformer T1 and generates a corresponding AC signal on the secondary side of transformer T1, which drives the transducer Y1 to work.
[0025] Understandably, this utility model also provides an ultrasonic therapy device, which includes a control module, a clock source chip, an ultrasonic drive circuit, and a transducer. The ultrasonic drive circuit is the ultrasonic drive circuit described in the above embodiment. The clock source chip is connected to the control module and is used to generate a clock signal according to the instructions from the control module. The ultrasonic drive circuit is connected between the output terminal of the clock source chip and the transducer to generate two complementary and symmetrical PWM pulse drive signals according to the clock signal, and generate a corresponding AC signal according to the PWM pulse drive signal to drive the transducer and achieve the purpose of ultrasonic therapy.
[0026] In summary, the ultrasonic drive circuit of this invention includes a signal source adjustment module and a switching module. The logic gate circuit in the signal source adjustment module converts the clock signal generated by the clock source chip in the ultrasonic therapy device into two complementary symmetrical PWM pulse drive signals. The switching module generates corresponding AC signals based on the two complementary symmetrical PWM pulse drive signals to drive the transducer. This allows the ultrasonic therapy device using the ultrasonic drive circuit of this invention to be suitable for treatment scenarios using dual pulses. Furthermore, the logic gate circuit is constructed from two identical gates, ensuring that the timing of the two output complementary symmetrical PWM pulse drive signals is synchronized. Therefore, the ultrasonic drive circuit of this invention, by constructing circuit modules with separate hardware components, can achieve the conversion from a single pulse signal to two complementary symmetrical PWM pulse drive signals. It is cost-effective, flexible in construction, and the synchronization design of the input clock signal transmission path through the logic gate circuit constructed from identical gates ensures that the timing of the two PWM pulse drive signals is synchronized without delay, thus avoiding timing problems.
[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. An ultrasonic driving circuit, applied in an ultrasonic therapy device, and connected between the clock source chip and the transducer of the ultrasonic therapy device, characterized in that, The ultrasonic driving circuit includes: The signal source adjustment module includes logic gate circuits for converting the clock signal generated by the clock source chip into two complementary and symmetrical PWM pulse drive signals. A switching module is connected between the output of the logic gate circuit and the transducer, and is used to generate corresponding AC signals according to two complementary and symmetrical PWM pulse drive signals to drive the transducer.
2. The ultrasonic driving circuit as described in claim 1, characterized in that, The logic gate circuit includes two XOR gates. One input of each XOR gate is connected to the output of the clock source chip, and the other input of each XOR gate is connected to the power supply VCC and ground through pull-up and pull-down circuits, respectively.
3. The ultrasonic driving circuit as described in claim 1, characterized in that, The logic gate circuit includes two XNOR gates. One input of each XNOR gate is connected to the output of the clock source chip, and the other input of each XNOR gate is connected to the power supply VCC and ground through pull-up and pull-down circuits, respectively.
4. The ultrasonic drive circuit as described in claim 2 or 3, characterized in that, The pull-up circuit includes a pull-up resistor, and the pull-down circuit includes a pull-down resistor.
5. The ultrasonic driving circuit as described in claim 1, characterized in that, The ultrasonic driving circuit also includes a half-bridge driving chip, which is connected between the output of the logic gate circuit and the input of the switching module.
6. The ultrasonic driving circuit as described in claim 5, characterized in that, The half-bridge driver chip is model UCC27524DR.
7. The ultrasonic driving circuit as described in claim 1, characterized in that, The switching module includes a first switching transistor, a second switching transistor, and a transformer. The gates of the first and second switching transistors are connected to the output terminals of the logic gate circuit, so as to be alternately turned on under the action of two complementary symmetrical PWM pulse drive signals. The drains of the first and second switching transistors are respectively connected to the two ends of the primary side of the transformer, and their sources are grounded. The secondary side of the transformer is connected to the transducer.
8. An ultrasonic therapy device, characterized in that, The ultrasonic therapy device includes a control module, a clock source chip, a transducer, and an ultrasonic driving circuit as described in any one of claims 1-7, wherein the clock source chip is connected to the control module and is used to generate a clock signal according to instructions from the control module, and the ultrasonic driving circuit is connected between the output terminal of the clock source chip and the transducer.