Ultrasonic therapeutic apparatus and power control structure thereof

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, concretely relates to an ultrasonic therapeutic instrument and power control structure thereof, and the ultrasonic therapeutic instrument includes ultrasonic head, control circuit and delay controller connected with ultrasonic head, control circuit includes analog -to -digital converter, amplifier U1, transformer, sampling resistance R1 and waveform generating device, and two transformers are connected in parallel between ultrasonic head and waveform generating device, two transformers are transformer A, transformer B respectively, and NPN triode A, triode B are arranged between waveform generating device and transformer A, transformer B respectively, and amplifier is connected with transformer A, B through sampling resistance, delay controller is connected with analog -to -digital converter, and delay controller is used for judging data and timing. Through threshold comparison and delay controller, the reliability and treatment safety of equipment are improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an ultrasonic therapy device and its power control structure. Background Technology

[0002] Existing ultrasound therapy devices typically output power directly at the set level upon startup. If there is no contact with the human body or poor contact, this can lead to energy waste or equipment damage. Although some devices have contact detection functions, they are prone to misjudgment due to brief accidental touches or signal fluctuations, affecting treatment safety and equipment reliability. Utility Model Content

[0003] The technical problem to be solved by this invention is that existing ultrasound therapy devices are prone to misjudgment due to brief accidental touches or signal fluctuations, which affects the safety of treatment and the reliability of the equipment.

[0004] Therefore, this utility model provides an ultrasonic therapy device and its power control structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A power control structure for an ultrasonic therapy device includes an ultrasonic head, a control circuit connected to the ultrasonic head, and a delay controller. The control circuit includes an analog-to-digital converter, an amplifier U1, a transformer, a sampling resistor R1, and a waveform generator. Two transformers, A and B, are connected in parallel between the ultrasonic head and the waveform generator. NPN transistors A and B are respectively installed between the waveform generator and transformers A and B. The amplifier is connected to both transformers A and B through the sampling resistor. The delay controller is connected to the analog-to-digital converter. The delay controller determines whether the action to be performed is contact or disengagement based on the data from the analog-to-digital converter and performs timing accordingly.

[0006] Furthermore, the collector of the transistor A is connected to the transformer A, the emitter is connected to the sampling resistor R1, and the other end of the sampling resistor R1 is grounded.

[0007] Furthermore, the emitter of the transistor B is connected to the transformer B, and the collector is connected to the non-grounded terminal of the sampling resistor R1.

[0008] Furthermore, the positive and negative input terminals of the amplifier U1 are connected to the two ends of the sampling resistor R1, respectively, and the output terminal is connected to the analog-to-digital converter.

[0009] An ultrasonic therapy device includes an ultrasonic head and a power control structure for the ultrasonic therapy device as described above, wherein the ultrasonic head is connected to the output terminal of a control circuit.

[0010] The beneficial effects of this invention are that, by combining threshold comparison and a delay controller, it effectively avoids malfunctions caused by brief accidental touches or signal fluctuations, thereby improving the reliability of the device and the safety of treatment. Simultaneously, the initial low duty cycle output and gradual power increase further ensure the safety of both the patient and the device. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0014] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] An ultrasonic therapy device includes an ultrasonic head and its power control structure. The power control structure includes a control circuit and a delay controller. The control circuit includes an analog-to-digital converter, an amplifier U1, a transformer, a sampling resistor R1, and a waveform generator.

[0017] Two transformers (Transformer A and Transformer B) are connected in parallel between the ultrasonic head and the waveform generator. NPN transistors A and B are respectively installed between the waveform generator and transformers A and B. The bases of transistors A and B are connected to the waveform generator, and the collector of transistor A is connected to transformer A. The emitter of transistor A is connected to sampling resistor R1, and the other end of sampling resistor R1 is grounded. The emitter of transistor B is connected to transformer B, and the collector is connected to the non-grounded end of sampling resistor R1. The positive and negative input terminals of amplifier U1 are connected to the two ends of sampling resistor R1, and the output terminal is connected to the analog-to-digital converter. The VCC / GND pins provide power to amplifier U1, ensuring the normal operation of amplifier U1's circuit bias and signal amplification functions, and are the energy foundation for the analog signal processing section.

[0018] The ultrasonic head receives electrical energy output from the transformer and converts it into ultrasonic mechanical energy through principles such as the piezoelectric effect, then emits ultrasonic waves, serving as the "execution terminal" of the entire circuit.

[0019] The waveform generator acts as a signal source, outputting small-amplitude, specific waveforms (such as pulses or sine waves, adapted to the requirements of ultrasound operation) electrical signals. These signals control the timing and signal characteristics of the subsequent power amplification stage, determining the final ultrasonic signal mode output by the ultrasound head. Transistors receive the signals from the waveform generator and control their on / off states, acting as a "switch" and providing initial signal amplification, thus driving the subsequent transformer.

[0020] Transformers A and B receive power input (usually DC high voltage, etc.), and combined with the control signal of the transistor, perform voltage transformation and power matching of the electrical energy, outputting AC power suitable for driving the ultrasonic head, providing sufficient energy for the ultrasonic head to work and generate ultrasonic waves.

[0021] The voltage signal output by the sampling resistor is usually very weak. The amplifier amplifies it to increase the signal amplitude, enabling the subsequent ADC (analog-to-digital converter) to accurately acquire and process the signal. Ultimately, this signal can be used to monitor the ultrasonic head's operating current, feedback control power, etc. The analog-to-digital converter (ADC) receives the amplified voltage signal from the amplifier and converts the analog voltage into a digital signal. This facilitates data processing, analysis, and control by subsequent digital circuits (such as microcontrollers, FPGAs, etc.), enabling intelligent monitoring and control of the ultrasonic system.

[0022] The sampling resistor R1 is connected in series in the power circuit. Utilizing the principle that "current flowing through a resistor generates voltage" (Ohm's Law: U = I×R), the circuit current when the ultrasonic head is working is converted into a measurable voltage signal, realizing the physical quantity conversion of "current → voltage".

[0023] When the ultrasound head comes into contact with the human body, the analog-to-digital converter will detect the voltage change. If the connection is normal... Once the device comes into contact with the human body, the power gradually increases. When the power exceeds the threshold set in the program, it is determined that the device has come into contact with the human body, and the therapeutic device begins to operate normally at the set values.

[0024] This circuit achieves ultrasonic energy output through the main line of "waveform generation → transistor control → transformer power drive → ultrasonic head emission of ultrasound"; at the same time, it relies on "sampling resistor + amplifier + ADC" to complete the monitoring and digitization of the working current, making it a functional circuit that takes into account both ultrasonic drive and current feedback.

[0025] The delay controller connects to the digital-to-analog converter (DAC). Based on the data from the DAC, the delay controller determines whether the action is contact or detachment and starts timing. If the collected data exceeds a threshold, positive timing begins, and the action begins after the timer expires. If negative data is detected during the timing period, negative timing begins, and the action begins after the timer reaches zero. This method avoids data fluctuations caused by short-term accidental touches, which could lead to device malfunctions. Furthermore, controlling the duration of the delay controls the sensitivity of the device's detection.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A power control structure for an ultrasonic therapy device, characterized in that, The device includes a control circuit for outputting current and a delay controller. The control circuit includes an analog-to-digital converter, an amplifier U1, a transformer, a sampling resistor R1, and a waveform generator. The waveform generator is connected in parallel with two transformers, namely transformer A and transformer B. An NPN transistor A and transistor B are respectively installed between the waveform generator and transformers A and B. The amplifier is connected to both transformers A and B through the sampling resistor. The delay controller is connected to the analog-to-digital converter. The delay controller determines whether the action to be performed is contact or disengagement based on the data from the analog-to-digital converter and performs timing accordingly.

2. The power control structure of the ultrasonic therapy device according to claim 1, characterized in that, The collector of transistor A is connected to transformer A, and the emitter is connected to sampling resistor R1. The other end of sampling resistor R1 is grounded.

3. The power control structure of the ultrasonic therapy device according to claim 1, characterized in that, The emitter of transistor B is connected to transformer B, and the collector is connected to the non-grounded end of sampling resistor R1.

4. The power control structure of the ultrasonic therapy device according to claim 1, characterized in that, The positive and negative input terminals of the amplifier U1 are connected to the two ends of the sampling resistor R1, respectively, and the output terminal is connected to the analog-to-digital converter.

5. The power control structure of the ultrasonic therapy device according to claim 1, characterized in that, The VCC / GND pin of the amplifier U1 is connected to an external power supply device to provide operating power to the amplifier U1.

6. An ultrasonic therapy device, characterized in that, It includes an ultrasonic head and a power control structure for an ultrasonic therapy device as described in any one of claims 1-4, wherein the ultrasonic head is connected to the output terminal of a control circuit.

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