Transducer drive system

Abstract

The utility model discloses a transducer driving system, and relates to the technical field of signal regulation and control. Comprising an acquisition module connected to a transducer and used for acquiring the working frequency of the transducer; the control module is connected with the acquisition module and is used for receiving the working frequency and outputting a first sinusoidal signal corresponding to the working frequency; the voltage amplification module is connected with the control module and is used for receiving the first sinusoidal signal and amplifying the voltage of the first sinusoidal signal so as to output a second sinusoidal signal; one end of the power amplification module is connected with the voltage amplification module, the other end of the power amplification module is connected with the transducer, and the power amplification module is used for receiving the second sinusoidal signal, amplifying the second sinusoidal signal and outputting the second sinusoidal signal to the transducer so as to drive the transducer. The utility model aims to improve the adaptability between the ultrasonic operation equipment and various transducers with different driving frequencies.

Description

Technical Field

[0001] The utility model relates to the technical field of signal regulation, in particular to a transducer driving system. Background Art

[0002] Ultrasonic surgical equipment is a medical device that uses a transducer to convert electrical energy into mechanical energy for surgical cutting. Commonly used transducers include standard frequencies such as 15KHz, 20KHz, 28KHz, 35KHz, 40KHz, 55KHz, and 70KHz. We can also design and manufacture non-standard transducers according to customer's special requirements to meet various needs.

[0003] In existing technology, a square wave signal of a fixed frequency is typically converted into a sinusoidal signal of the same frequency through an LC resonant network. For example, a 55kHz square wave signal can be converted into a 55kHz sinusoidal signal through an LC resonant network, and then output to the transducer. However, a single LC resonant network is only suitable for transducers of that specific frequency. To adapt to transducers of other frequencies, the L and C components must be re-simulated and re-calculated, and the hardware circuit of the LC resonant network must be modified, resulting in limited flexibility. Utility Model Content

[0004] The main purpose of the utility model is to provide a transducer driving system, aiming to improve the adaptability between ultrasonic surgical equipment and transducers with multiple different driving frequencies.

[0005] To achieve the above objectives, the transducer drive system proposed in the present invention is applied to ultrasonic surgical equipment, comprising:

[0006] An acquisition module, connected to the transducer, for obtaining the operating frequency of the transducer;

[0007] a control module, connected to the acquisition module, configured to receive the operating frequency and output a first sinusoidal signal corresponding to the operating frequency output;

[0008] a voltage amplifying module, connected to the control module, configured to receive the first sinusoidal signal and amplify the voltage of the first sinusoidal signal to output a second sinusoidal signal;

[0009] A power amplifier module, one end of which is connected to the voltage amplifier module, and the other end of which is connected to the transducer, is used to receive the second sinusoidal signal, amplify the second sinusoidal signal, and output it to the transducer to drive the transducer.

[0010] In one embodiment, the voltage amplification module includes:

[0011] a first voltage amplifying circuit, wherein an input end of the first voltage amplifying circuit is electrically connected to an output end of the control module, and the first voltage amplifying circuit is configured to amplify the first sinusoidal signal according to a first preset amplification factor;

[0012] a second voltage amplifying circuit, wherein the input end of the second voltage amplifying circuit is electrically connected to the first voltage amplifying circuit, the output end of the second voltage amplifying circuit is electrically connected to the input end of the power amplifying module, and the second voltage amplifying circuit is used to amplify the first sinusoidal signal amplified according to the first preset amplification factor according to a second preset amplification factor to output a second sinusoidal signal.

[0013] In one embodiment, the first voltage amplifying circuit includes:

[0014] a first amplifier chip circuit, wherein an input end of the first amplifier chip circuit is electrically connected to the control module, an output end of the first amplifier chip circuit is electrically connected to the second voltage amplifier circuit, and the first amplifier chip circuit is configured to amplify the first sinusoidal signal according to a first preset amplification factor;

[0015] A first adjustable circuit is electrically connected to the first amplifier chip circuit and is used to output a first sinusoidal signal amplified according to a first preset amplification factor.

[0016] In one embodiment, the first amplifier chip circuit includes a first voltage amplifier chip, a first capacitor C1, a second capacitor C2, and a power supply; the first adjustable circuit includes a first potentiometer;

[0017] Among them, the first pin of the first voltage amplifying chip is electrically connected to the first end of the first potentiometer, and the eighth pin of the first voltage amplifying chip is electrically connected to the second end of the first potentiometer; the second pin of the first voltage amplifying chip is electrically connected to the first output end of the control module; the third pin of the first voltage amplifying chip is electrically connected to the second output end of the control module and the ground end; the fourth pin of the first voltage amplifying chip is electrically connected to the first end of the first capacitor C1; the second end of the first capacitor C1 is electrically connected to the second end of the second capacitor and the ground end; the first end of the second capacitor is electrically connected to the seventh pin of the first voltage amplifying chip and the positive electrode of the power supply; the fifth pin of the first voltage amplifying chip is grounded; and the sixth pin of the first voltage amplifying chip is electrically connected to the second voltage amplifying circuit.

[0018] In one embodiment, the second voltage amplifying circuit includes:

[0019] a second amplifier chip circuit, wherein an input end of the second amplifier chip circuit is electrically connected to the first voltage amplifier circuit, an output end of the second amplifier chip circuit is electrically connected to the power amplifier module, and the second amplifier chip circuit is configured to further amplify the first sinusoidal signal amplified according to the first preset amplification factor according to a second preset amplification factor to obtain a second sinusoidal signal;

[0020] A second adjustable circuit is electrically connected to the second amplifier chip circuit and is used to output the second sinusoidal signal.

[0021] In one embodiment, the second amplifier chip circuit includes a second voltage amplifier chip, a third capacitor, a fourth capacitor, and a power supply; the second adjustable circuit includes a second potentiometer;

[0022] Among them, the first pin of the second voltage amplifying chip is electrically connected to the first end of the second potentiometer, and the eighth pin of the second voltage amplifying chip is electrically connected to the eighth end of the second potentiometer; the third pin and the fifth pin of the second voltage amplifying chip are electrically connected to the ground end; the fourth pin of the second voltage amplifying chip is electrically connected to the first end of the third capacitor; the second end of the third capacitor is electrically connected to the second end of the fourth capacitor and the ground end; the first end of the fourth capacitor is electrically connected to the seventh pin of the second voltage amplifying chip and the positive electrode of the power supply; and the sixth pin of the second voltage amplifying chip is electrically connected to the input end of the power amplifying module.

[0023] In one embodiment, the power amplification module includes a first resistor, a first adjustable resistor, a second adjustable resistor, a third adjustable resistor, a first switching tube, a second switching tube, and a power supply;

[0024] Among them, the adjustment end of the first adjustable resistor is electrically connected to the output end of the voltage amplification module, the first end of the first adjustable resistor is electrically connected to the second end of the first resistor and the controlled end of the first switching tube, and the second end of the first adjustable resistor is electrically connected to the first end of the third adjustable resistor and the controlled end of the second switching tube; the first end of the first resistor is electrically connected to the second end of the second adjustable resistor; the adjustment end of the second adjustable resistor is electrically connected to the first end of the second adjustable resistor, the first end of the first switching tube, and the positive electrode of the power supply; the adjustment end of the third adjustable resistor is electrically connected to the second end of the third adjustable resistor, the second end of the second switching tube, and the negative electrode of the power supply; the second end of the first switching tube is electrically connected to the first end of the second switching tube and the transducer.

[0025] In one embodiment, the acquisition module acquires the current and / or voltage of the transducer, and calculates the operating frequency of the transducer based on the acquired current and / or voltage.

[0026] In one embodiment, the acquisition module includes a voltage acquisition circuit, the input end of the voltage acquisition circuit is electrically connected to the output end of the power amplification module, the output end of the acquisition module is electrically connected to the control module, and the voltage acquisition circuit is used to acquire the voltage fed to the transducer via the power amplification module; and / or,

[0027] The acquisition module includes a current acquisition circuit, the input end of the current acquisition circuit is electrically connected to the output end of the power amplification module, the output end of the current acquisition circuit is electrically connected to the control module, and the current acquisition circuit is used to collect the current fed from the power amplification module to the transducer.

[0028] In one embodiment, it further includes a filtering module and an isolation transformer module; wherein,

[0029] The filtering module is connected in series between the control module and the voltage amplification module, and the filtering module is used to filter the first sinusoidal signal;

[0030] The input end of the isolation transformer module is electrically connected to the output end of the power amplifier module. The isolation transformer module is used to isolate and transform the amplified second sinusoidal signal and then output it to the transducer.

[0031] The technical solution of the present utility model adopts an acquisition module connected to the transducer to obtain the operating frequency of the transducer, so that the control module outputs a first sinusoidal signal according to the operating frequency of the transducer obtained by the acquisition module. In addition, the first sinusoidal signal output by the control module at a preset frequency is amplified by the voltage amplifier module to improve the stability of the sinusoidal signal and output a second sinusoidal signal. Furthermore, the second sinusoidal signal is power-amplified by the power amplifier module to increase the intensity of the sinusoidal signal and output a third sinusoidal signal, thereby driving the transducer of the corresponding driving frequency to work. By changing the preset frequency of the sinusoidal signal output by the control module, it can be adapted to transducers of different driving frequencies without changing the hardware structure of the ultrasonic surgical equipment, thereby effectively improving the adaptability between the ultrasonic surgical equipment and transducers of various different driving frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1This is a module diagram of the transducer drive system of the utility model;

[0034] Figure 2 This is a circuit diagram of an embodiment of a transducer driving system of the present utility model;

[0035] Figure 3 This is a module diagram of an embodiment of the transducer driving system of the present invention.

[0036] Description of Figure Numbers:

[0037] 10. Control module; 20. Voltage amplification module; 21. First voltage amplification circuit; 22. Second voltage amplification circuit; 30. Power amplification module; 40. Acquisition module; 50. Isolation transformer module; 60. Filter module.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0042] Ultrasonic surgical equipment is a medical device that uses a transducer to convert electrical energy into mechanical energy for surgical cutting. Commonly used transducers include standard frequencies such as 15KHz, 20KHz, 28KHz, 35KHz, 40KHz, 55KHz, and 70KHz. We can also design and manufacture non-standard transducers according to customer's special requirements to meet various needs.

[0043] In existing technology, a square wave signal of a fixed frequency is typically converted into a sinusoidal signal of the same frequency through an LC resonant network. For example, a 55kHz square wave signal can be converted into a 55kHz sinusoidal signal through an LC resonant network, and then output to the transducer. However, a single LC resonant network is only suitable for transducers of that specific frequency. To adapt to transducers of other frequencies, the L and C components must be re-simulated and re-calculated, and the hardware circuit of the LC resonant network must be modified, resulting in limited flexibility.

[0044] Therefore, reference Figure 1 The present invention proposes a transducer drive system for ultrasonic surgical equipment, comprising:

[0045] An acquisition module 40 is connected to the transducer and is used to obtain the operating frequency of the transducer;

[0046] The control module 10 is connected to the acquisition module 40 and is used to receive the operating frequency and output a first sinusoidal signal corresponding to the operating frequency output;

[0047] a voltage amplifying module 20 connected to the control module 10, configured to receive the first sinusoidal signal and amplify the voltage of the first sinusoidal signal to output a second sinusoidal signal;

[0048] A power amplifier module 30 , one end of which is connected to the voltage amplifier module 20 , and the other end of which is connected to the transducer, is configured to receive the second sinusoidal signal, amplify the second sinusoidal signal, and output it to the transducer to drive the transducer.

[0049] In this embodiment, the acquisition module 40 can be implemented by an impedance analysis circuit, a detector circuit, etc. During the process of the acquisition module 40 acquiring the operating frequency of the transducer, the transducer is usually in a working state. This is because when acquiring frequency information, the transducer is required to actually generate ultrasonic vibrations or corresponding electrical signals to obtain its specific operating frequency. Among them, the acquisition module 40 can acquire the operating frequency of the transducer by various methods such as dynamic acquisition or static acquisition. For example, the dynamic acquisition method requires the host to output a corresponding excitation signal to the transducer so that it generates corresponding ultrasonic vibrations, and then the acquisition module 40 acquires its operating frequency. The static acquisition method indirectly determines the operating frequency by measuring the electrical characteristics of the transducer (such as impedance). The acquisition module 40 outputs the operating frequency of the transducer obtained by it to the control module 10, so that the control module 10 can directly output a sinusoidal signal corresponding to the operating frequency of the transducer.

[0050] In this embodiment, the control module 10 can be implemented using a main controller, such as a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), an MCU (Microcontroller Unit), or an SOC (System on Chip). For example, the control module 10 is an FPGA. The FPGA can utilize DDS (Direct Digital Synthesis) technology to internally generate a first sinusoidal signal corresponding to the operating frequency of the transducer acquired by the acquisition module 40. This method can flexibly adjust the frequency of the sinusoidal signal without adjusting the circuit hardware, thereby avoiding the limitations of the traditional LC resonant network and enabling the ultrasonic surgical device to adapt to transducers of different frequencies without adjusting the circuit hardware. However, the first sinusoidal signal output by the control module 10 cannot directly act on the transducer and needs to undergo a series of signal processing before it can stably drive the transducer corresponding to the driving frequency.

[0051] In this embodiment, the voltage amplification module 20 can be implemented using multiple voltage amplification chips or multiple voltage amplifiers. It is understandable that the sinusoidal signal may be weakened during transmission due to factors such as resistance loss and capacitive coupling, which may cause the transducer to be unable to effectively obtain the driving signal. The voltage amplification module 20 can help restore the signal strength to ensure that the signal is still strong enough for use when it is transmitted to the destination. In addition, the impedance mismatch between the signal source and the load will cause signal reflection and energy loss. The voltage amplification module 20 can also optimize this matching by setting appropriate impedance conversion, thereby improving energy transmission efficiency. Therefore, the voltage amplification module 20 effectively enhances the voltage amplitude of the first sinusoidal signal after performing voltage amplification processing on the first sinusoidal signal output by the control module 10, avoiding the problem of being masked by noise due to weak signal.

[0052] In this embodiment, the transducer generally requires a relatively large power drive to generate effective ultrasonic waves. The second sinusoidal signal output by the voltage amplification module 20 may not be sufficient to drive the transducer to generate the required ultrasonic wave intensity. Therefore, it is necessary to set a power amplification module 30 to provide a third sinusoidal signal of sufficient power to drive the transducer. Among them, the power amplification module 30 can be implemented by a push-pull amplifier circuit, a single-ended amplifier circuit, etc. Furthermore, the transducer requires a relatively large current when working. Although the second sinusoidal signal is output after being processed by the voltage amplification module 20 and has a suitable voltage level, it may not have sufficient current driving capability. Therefore, the power amplification module 30 can also ensure that the output third sinusoidal signal has not only sufficient voltage, but also sufficient current to drive the transducer.

[0053] In this embodiment, an acquisition module 40 is used, connected to the transducer, to obtain the operating frequency of the transducer, so that the control module 10 outputs a first sinusoidal signal according to the operating frequency of the transducer obtained by the acquisition module 40. In addition, the first sinusoidal signal output by the control module at a preset frequency is amplified by the voltage amplifier module 20 to improve the stability of the sinusoidal signal and output a second sinusoidal signal. Furthermore, the second sinusoidal signal is power-amplified by the power amplifier module 30 to increase the intensity of the sinusoidal signal and output a third sinusoidal signal, thereby driving the transducer of the corresponding driving frequency to operate. By changing the preset frequency of the sinusoidal signal output by the control module 10, it can be adapted to transducers of different driving frequencies without changing the hardware structure of the ultrasonic surgical equipment, effectively improving the adaptability between the ultrasonic surgical equipment and transducers of various different driving frequencies.

[0054] refer to Figure 2 and Figure 3 In one embodiment of the present invention, the voltage amplification module 20 includes:

[0055] a first voltage amplifying circuit 21, wherein an input end of the first voltage amplifying circuit 21 is electrically connected to an output end of the control module 10, and the first voltage amplifying circuit 21 is configured to amplify the first sinusoidal signal according to a first preset amplification factor;

[0056] A second voltage amplifier circuit 22, the input end of the second voltage amplifier circuit 22 is electrically connected to the first voltage amplifier circuit 21, the output end of the second voltage amplifier circuit 22 is electrically connected to the input end of the power amplifier module 30, and the second voltage amplifier circuit 22 is used to amplify the first sinusoidal signal amplified according to the first preset amplification factor according to the second preset amplification factor to output a second sinusoidal signal.

[0057] In this embodiment, the use of a single voltage amplifier circuit may result in problems such as limited voltage amplification effect and unstable voltage amplification effect. Therefore, the first voltage amplifier circuit 21 and the second voltage amplifier circuit 22 are used to perform voltage amplification processing on the input first sinusoidal signal twice to ensure that the output second sinusoidal signal is sufficiently stable. Among them, the first voltage amplifier circuit 21 is used to pre-amplify the first sinusoidal signal, while increasing the voltage level of the first sinusoidal signal, improving the signal-to-noise ratio of the first sinusoidal signal and reducing signal loss in subsequent processing. After the pre-amplification processing, the second voltage amplifier circuit 22 can further increase the voltage gain of the sinusoidal signal. This is because pre-amplification usually only provides preliminary signal enhancement, while the second voltage amplifier circuit 22 is responsible for amplifying the signal to the required final voltage level. Therefore, the use of a multi-stage voltage amplifier circuit to achieve voltage amplification of the sinusoidal signal effectively improves the stability of the sinusoidal signal output to the transducer.

[0058] Optionally, the first voltage amplifying circuit 21 includes:

[0059] The first voltage amplifying circuit 21 includes:

[0060] a first amplifier chip circuit, wherein an input end of the first amplifier chip circuit is electrically connected to the control module 10, an output end of the first amplifier chip circuit is electrically connected to the second voltage amplifier circuit 22, and the first amplifier chip circuit is used to amplify the first sinusoidal signal according to a first preset amplification factor;

[0061] A first adjustable circuit is electrically connected to the first amplifier chip circuit and is used to output a first sinusoidal signal amplified according to a first preset amplification factor.

[0062] Specifically, the first amplifier chip circuit includes a first voltage amplifier chip, a first capacitor C1, a second capacitor C2, and a power supply; the first adjustable circuit includes a first potentiometer;

[0063] Among them, the first pin of the first voltage amplifying chip is electrically connected to the first end of the first potentiometer, and the eighth pin of the first voltage amplifying chip is electrically connected to the second end of the first potentiometer; the second pin of the first voltage amplifying chip is electrically connected to the first output end of the control module 10; the third pin of the first voltage amplifying chip is electrically connected to the second output end of the control module 10 and the ground end; the fourth pin of the first voltage amplifying chip is electrically connected to the first end of the first capacitor C1; the second end of the first capacitor C1 is electrically connected to the second end of the second capacitor C2 and the ground end; the first end of the second capacitor C2 is electrically connected to the seventh pin of the first voltage amplifying chip and the positive electrode of the power supply; the fifth pin of the first voltage amplifying chip is grounded; and the sixth pin of the first voltage amplifying chip is electrically connected to the second voltage amplifying circuit 22.

[0064] Optionally, the second voltage amplifying circuit 22 includes:

[0065] a second amplifier chip circuit, wherein an input end of the second amplifier chip circuit is electrically connected to the first voltage amplifier circuit 21, an output end of the second amplifier chip circuit is electrically connected to the power amplifier module 30, and the second amplifier chip circuit is configured to further amplify the first sinusoidal signal amplified according to the first preset amplification factor according to a second preset amplification factor to obtain a second sinusoidal signal;

[0066] A second adjustable circuit is electrically connected to the second amplifier chip circuit and is used to output the second sinusoidal signal.

[0067] Specifically, the second amplifier chip circuit includes a second voltage amplifier chip, a third capacitor C3, a fourth capacitor C4, and a power supply; the second adjustable circuit includes a second potentiometer;

[0068] The first pin of the second voltage amplifier chip is electrically connected to the first end of the second potentiometer, and the eighth pin of the second voltage amplifier chip is electrically connected to the eighth end of the second potentiometer. The third and fifth pins of the second voltage amplifier chip are electrically connected to the ground. The fourth pin of the second voltage amplifier chip is electrically connected to the first end of the third capacitor. The second end of the third capacitor is electrically connected to the second end of the fourth capacitor and the ground. The first end of the fourth capacitor is electrically connected to the seventh pin of the second voltage amplifier chip and the positive electrode of the power supply. The sixth pin of the second voltage amplifier chip is electrically connected to the input end of the power amplifier module 30. By adjusting the second potentiometer, the second preset amplification factor of the second voltage amplifier circuit 22 is changed. Capacitive coupling is used between the first and second amplifier circuits to isolate the sinusoidal signal and avoid the influence of DC bias between different stages, ensuring that the DC operating point of each stage is not affected by the previous or next stage. The first preset amplification factor of the first voltage amplifier circuit 21 needs to be combined with the second preset amplification factor of the second voltage amplifier circuit 22 to ensure that the amplification factor of the first sinusoidal signal by the voltage amplifier circuit 20 meets the amplification target.

[0069] refer to Figure 2 In one embodiment of the present utility model, the power amplifier module 30 includes a first resistor R4, a first adjustable resistor R1, a second adjustable resistor R2, a third adjustable resistor R3, a first switch tube Q1, a second switch tube Q2, and a power supply;

[0070] Among them, the adjustment end of the first adjustable resistor R1 is electrically connected to the output end of the voltage amplification module 20, the first end of the first adjustable resistor R1 is electrically connected to the second end of the first resistor R4 and the controlled end of the first switch tube Q1, and the second end of the first adjustable resistor R1 is electrically connected to the first end of the third adjustable resistor R3 and the controlled end of the second switch tube Q2; the first end of the first resistor R4 is electrically connected to the second end of the second adjustable resistor R2; the adjustment end of the second adjustable resistor R2 is electrically connected to the first end of the second adjustable resistor R2, the first end of the first switch tube Q1, and the positive electrode of the power supply; the adjustment end of the third adjustable resistor R3 is electrically connected to the second end of the third adjustable resistor R3, the second end of the second switch tube Q2, and the negative electrode of the power supply; the second end of the first switch tube Q1 is electrically connected to the first end of the second switch tube Q2 and the transducer.

[0071] In this embodiment, the power amplifier module 30 employs a push-pull amplifier circuit to amplify the power of the amplified second sinusoidal signal, thereby providing a strong load driving capability. The first switch Q1 and the second switch Q2 can be implemented using transistors, field-effect transistors, or the like. For example, two MOS transistors, one N-channel and one P-channel, can be interconnected. The second and third adjustable resistors R2 and R3 are used to adjust the static operating point of the power amplifier module 30, thereby amplifying the power of the second sinusoidal signal and outputting a third sinusoidal signal.

[0072] refer to Figure 3 In one embodiment of the present invention, the acquisition module 40 acquires the current and / or voltage of the transducer, and calculates the operating frequency of the transducer based on the acquired current and / or voltage.

[0073] In this embodiment, the acquisition module 40 can be implemented using a frequency discriminator, a voltage acquisition circuit, a current acquisition circuit, or the like. It is understood that by electrically connecting the input of the acquisition module 40 to the input of the transducer, the acquisition module 40 can acquire the transducer's operating frequency. The acquisition module 40 acquires the transducer's operating current and / or voltage and, using a preset algorithm, derives the transducer's operating frequency. Furthermore, by electrically connecting the output of the acquisition module 40 to the control module 10, the calculated transducer operating frequency can be output to the control module 10, which then confirms the transducer's operating frequency and outputs a corresponding first sinusoidal signal.

[0074] Optionally, the acquisition module 40 includes a voltage acquisition circuit, the input end of the voltage acquisition circuit is electrically connected to the output end of the power amplification module 30, the output end of the voltage acquisition circuit is electrically connected to the control module 10, and the voltage acquisition circuit is used to acquire the output voltage of the power amplification module 30 and output a voltage detection signal; and / or,

[0075] The acquisition module 40 includes a current acquisition circuit, the input end of the current acquisition circuit is electrically connected to the output end of the power amplification module 30, and the output end of the current acquisition circuit is electrically connected to the control module 10. The current acquisition circuit is used to collect the output current of the power amplification module 30 and output a current detection signal.

[0076] In this embodiment, the third sinusoidal signal output to the transducer interface is collected using a voltage acquisition circuit and / or a current acquisition circuit. The voltage acquisition circuit can be implemented using a resistor divider circuit, a voltage detection chip, or the like, while the current acquisition circuit can be implemented using sensors such as a resistor shunt, a Hall current sensor, a Rogowski coil current sensor, a fluxgate current sensor, and a fiber optic current sensor. By acquiring the voltage and / or current between the power amplifier module 30 and the transducer interface, the control device obtains the voltage detection signal and / or the current detection signal, and uses a built-in algorithm to derive the frequency, phase, and power of the third sinusoidal signal, as well as the impedance of the tissue clamped by the transducer.

[0077] refer to Figure 3 In one embodiment of the present utility model, a filter module 60 and an isolation transformer module 50 are also included; wherein,

[0078] The filtering module 60 is connected in series between the control module 10 and the voltage amplification module 20, and the filtering module 60 is used to filter the first sinusoidal signal;

[0079] The input end of the isolation transformer module 50 is electrically connected to the output end of the power amplifier module 30 . The isolation transformer module 50 is used to isolate and transform the amplified second sinusoidal signal and then output it to the transducer.

[0080] In this embodiment, the control module 10 is an FPGA, and DDS is used to generate the first sinusoidal signal as an example. The core of DDS is to use a phase accumulator to generate a phase change by accumulating a phase increment. Due to the limited bit width of the accumulator, quantization error will be generated during the phase accumulation process, and this error will be reflected in the output signal to form quantization noise. In addition, the lookup table in the DDS is used to store sinusoidal waveform data, and the resolution of this table is limited. The limited resolution will cause a step effect in the output signal, further introducing noise. In addition, noise such as digital-to-analog conversion and electromagnetic interference. Therefore, after the control module 10 outputs the first sinusoidal signal, it needs to pass through the filtering module 60 to reduce the correlated noise, thereby improving the quality of the first sinusoidal signal.

[0081] In this embodiment, the isolation transformer module 50 can be implemented using a transformer circuit. The isolation transformer module 50 achieves electrical isolation between the signal source and the load, thereby preventing mutual influence between the control module 10 and the transducer. Furthermore, the amplitude and phase of the sinusoidal signal output to the transducer are adjusted to optimize the quality of the sinusoidal signal.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A transducer drive system, used in ultrasonic surgical equipment; characterized in that: include: An acquisition module, connected to the transducer, for obtaining the operating frequency of the transducer; a control module, connected to the acquisition module, configured to receive the operating frequency and output a first sinusoidal signal corresponding to the operating frequency; a voltage amplifying module, connected to the control module, configured to receive the first sinusoidal signal and amplify the voltage of the first sinusoidal signal to output a second sinusoidal signal; A power amplifier module, one end of which is connected to the voltage amplifier module, and the other end of which is connected to the transducer, is used to receive the second sinusoidal signal, amplify the second sinusoidal signal, and output it to the transducer to drive the transducer.

2. The transducer driving system according to claim 1, wherein: The voltage amplification module includes: a first voltage amplifying circuit, wherein an input end of the first voltage amplifying circuit is electrically connected to an output end of the control module, and the first voltage amplifying circuit is configured to amplify the first sinusoidal signal according to a first preset amplification factor; a second voltage amplifying circuit, wherein the input end of the second voltage amplifying circuit is electrically connected to the first voltage amplifying circuit, the output end of the second voltage amplifying circuit is electrically connected to the input end of the power amplifying module, and the second voltage amplifying circuit is used to amplify the first sinusoidal signal amplified according to the first preset amplification factor according to a second preset amplification factor to output a second sinusoidal signal.

3. The transducer driving system according to claim 2, wherein: The first voltage amplifying circuit includes: a first amplifier chip circuit, wherein an input end of the first amplifier chip circuit is electrically connected to the control module, an output end of the first amplifier chip circuit is electrically connected to the second voltage amplifier circuit, and the first amplifier chip circuit is configured to amplify the first sinusoidal signal according to a first preset amplification factor; A first adjustable circuit is electrically connected to the first amplifier chip circuit and is used to output a first sinusoidal signal amplified according to a first preset amplification factor.

4. The transducer driving system according to claim 3, wherein: The first amplifier chip circuit includes a first voltage amplifier chip, a first capacitor, a second capacitor, and a power supply; the first adjustable circuit includes a first potentiometer; Among them, the first pin of the first voltage amplifying chip is electrically connected to the first end of the first potentiometer, and the eighth pin of the first voltage amplifying chip is electrically connected to the second end of the first potentiometer; the second pin of the first voltage amplifying chip is electrically connected to the first output end of the control module; the third pin of the first voltage amplifying chip is electrically connected to the second output end of the control module and the ground end; the fourth pin of the first voltage amplifying chip is electrically connected to the first end of the first capacitor; the second end of the first capacitor is electrically connected to the second end of the second capacitor and the ground end; the first end of the second capacitor is electrically connected to the seventh pin of the first voltage amplifying chip and the positive electrode of the power supply; the fifth pin of the first voltage amplifying chip is grounded; and the sixth pin of the first voltage amplifying chip is electrically connected to the second voltage amplifying circuit.

5. The transducer driving system according to claim 2, wherein: The second voltage amplifying circuit includes: a second amplifier chip circuit, wherein an input end of the second amplifier chip circuit is electrically connected to the first voltage amplifier circuit, an output end of the second amplifier chip circuit is electrically connected to the power amplifier module, and the second amplifier chip circuit is configured to further amplify the first sinusoidal signal amplified according to the first preset amplification factor according to a second preset amplification factor to obtain a second sinusoidal signal; A second adjustable circuit is electrically connected to the second amplifier chip circuit and is used to output the second sinusoidal signal.

6. The transducer driving system according to claim 5, wherein: The second amplifier chip circuit includes a second voltage amplifier chip, a third capacitor, a fourth capacitor, and a power supply; the second adjustable circuit includes a second potentiometer; Among them, the first pin of the second voltage amplifying chip is electrically connected to the first end of the second potentiometer, and the eighth pin of the second voltage amplifying chip is electrically connected to the eighth end of the second potentiometer; the third pin and the fifth pin of the second voltage amplifying chip are electrically connected to the ground end; the fourth pin of the second voltage amplifying chip is electrically connected to the first end of the third capacitor; the second end of the third capacitor is electrically connected to the second end of the fourth capacitor and the ground end; the first end of the fourth capacitor is electrically connected to the seventh pin of the second voltage amplifying chip and the positive electrode of the power supply; and the sixth pin of the second voltage amplifying chip is electrically connected to the input end of the power amplifying module.

7. The transducer driving system according to claim 1, wherein: The power amplification module includes a first resistor, a first adjustable resistor, a second adjustable resistor, a third adjustable resistor, a first switching tube, a second switching tube, and a power supply; Among them, the adjustment end of the first adjustable resistor is electrically connected to the output end of the voltage amplification module, the first end of the first adjustable resistor is electrically connected to the second end of the first resistor and the controlled end of the first switching tube, and the second end of the first adjustable resistor is electrically connected to the first end of the third adjustable resistor and the controlled end of the second switching tube; the first end of the first resistor is electrically connected to the second end of the second adjustable resistor; the adjustment end of the second adjustable resistor is electrically connected to the first end of the second adjustable resistor, the first end of the first switching tube, and the positive electrode of the power supply; the adjustment end of the third adjustable resistor is electrically connected to the second end of the third adjustable resistor, the second end of the second switching tube, and the negative electrode of the power supply; the second end of the first switching tube is electrically connected to the first end of the second switching tube and the transducer.

8. The transducer driving system according to any one of claims 1 to 7, characterized in that: The acquisition module acquires the current and / or voltage of the transducer, and calculates the operating frequency of the transducer according to the acquired current and / or voltage.

9. The transducer driving system according to claim 8, wherein: The acquisition module includes a voltage acquisition circuit, the input end of the voltage acquisition circuit is electrically connected to the output end of the power amplification module, the output end of the acquisition module is electrically connected to the control module, and the voltage acquisition circuit is used to acquire the voltage fed to the transducer via the power amplification module; and / or, The acquisition module includes a current acquisition circuit, the input end of the current acquisition circuit is electrically connected to the output end of the power amplification module, the output end of the current acquisition circuit is electrically connected to the control module, and the current acquisition circuit is used to collect the current fed from the power amplification module to the transducer.

10. The transducer driving system according to any one of claims 1 to 7, characterized in that: It also includes a filter module and an isolation transformer module; wherein, The filtering module is connected in series between the control module and the voltage amplification module, and the filtering module is used to filter the first sinusoidal signal; The input end of the isolation transformer module is electrically connected to the output end of the power amplifier module. The isolation transformer module is used to isolate and transform the amplified second sinusoidal signal and then output it to the transducer.

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