Ultrasonic drive apparatus and method of conditioning thereof

Abstract

The application discloses an ultrasonic driving device and a regulating method thereof, and relates to the technical field of medical instruments. The device comprises a signal output module, a transducer, and a feedback module. The signal output module generates a driving signal and transmits the driving signal to the transducer. The transducer receives the driving signal and outputs mechanical energy according to the driving signal. The feedback module acquires the driving signal generated by the signal output module and real-time sampling data corresponding to the driving signal. A control module adjusts the driving signal transmitted by the signal output module to the transducer according to the real-time sampling data, so that the active power of the driving signal reaches a preset power. Through implementation of the ultrasonic driving device and the regulating method thereof, the direct current bias voltage of a power amplifier and the frequency of a driving signal of a signal generator can be adjusted in real time according to real-time impedance and voltage-current phase difference, so that the transducer works in a preset resonant state, and the energy consumption of the device is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an ultrasonic driving device and its adjustment method. Background Technology

[0002] Ultrasonic ablation surgery is a treatment method that uses high-intensity focused ultrasound (HIFU) ablation equipment to treat various solid benign and malignant tumors (such as liver cancer, bone tumors, breast cancer, pancreatic cancer, and uterine fibroids). The principle of ultrasonic ablation is: the device outputs a sinusoidal electrical signal to excite a transducer in the balloon at the distal end of the catheter to generate ultrasonic waves. When the transducer operates in a purely resistive resonance state, the efficiency of converting electrical energy into ultrasonic waves is the highest, and the heat loss is the least.

[0003] Due to factors such as manufacturing processes, heat generation during operation, and balloon compression, the impedance of the transducer changes. Impedance calibration during production alone is insufficient to guarantee optimal resonance throughout the entire surgical procedure. To adjust the transducer's resonance, the inductance and capacitance values ​​of adjustable inductors and capacitors are commonly used to adjust the real-time impedance. However, this method requires significant hardware support; some components, especially inductors, occupy a large area on the circuit board, contradicting the trend towards miniaturization and lightweight design. Furthermore, the high cost and difficulty in precise adjustment of the hardware make this method challenging to implement. Therefore, there is an urgent need for an ultrasonic drive device and its adjustment method that can adjust the transducer impedance in real-time during ultrasonic ablation surgery, ensuring the transducer operates in resonance and reducing energy consumption. Summary of the Invention

[0004] To address the problem in existing technologies where transducers deviate from their resonant state due to impedance changes caused by heat generation and balloon deformation during ultrasound ablation surgery, this invention provides an ultrasound driving device and its adjustment method. This device adjusts the impedance in real time based on environmental factors during ultrasound ablation surgery, ensuring the transducer operates in a resonant state and reducing energy consumption.

[0005] To solve one or more of the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] In a first aspect, an ultrasonic driving device is provided, comprising:

[0007] The signal output module generates a drive signal and transmits it to the transducer. The signal output module includes a signal generator and a power amplifier. The signal output terminal of the signal generator is electrically connected to the first power amplifier port of the power amplifier, and the second power amplifier port of the power amplifier serves as the signal output port. The drive signal is a sinusoidal signal.

[0008] A transducer receives a drive signal and outputs mechanical energy according to the drive signal.

[0009] The feedback module acquires the drive signal generated by the signal output module, as well as the real-time sampled data corresponding to the drive signal;

[0010] The control module adjusts the drive signal transmitted from the signal output module to the transducer based on real-time sampled data, so that the active power of the drive signal reaches the preset power.

[0011] Furthermore, the feedback module includes:

[0012] Voltage transformer, current transformer, first resistor, second resistor, first diode, second diode, first capacitor, second capacitor;

[0013] The first port of the voltage transformer is electrically connected to the signal output port of the signal output module, the second port of the voltage transformer is electrically connected to the transducer input port of the transducer, the third port of the voltage transformer is electrically connected to one end of the second resistor, the fourth port of the voltage transformer is electrically connected to one end of the first resistor, and the first resistor and the second resistor are connected in series.

[0014] The connection point between the first resistor and the second resistor is electrically connected to the first port of the current transformer. The second and third ports of the current transformer are both grounded. The fourth port of the current transformer is electrically connected to the signal output port.

[0015] The anode of the first diode is electrically connected to one end of the first resistor, the anode of the second diode is electrically connected to one end of the second resistor, the cathode of the first diode is electrically connected to one end of the first capacitor, the cathode of the second diode is electrically connected to one end of the second capacitor, the first capacitor and the second capacitor are connected in series, and the connection point between the first capacitor and the second capacitor is grounded.

[0016] Furthermore, the turns ratio of the primary side to the secondary side of the voltage transformer is the first turns ratio;

[0017] The turns ratio of the primary winding to the secondary winding of the current transformer is the second turns ratio;

[0018] The first port and the second port of the voltage transformer are the primary side ports of the voltage transformer;

[0019] The first port and the second port of the current transformer are the primary side ports of the current transformer.

[0020] Furthermore, the first turns ratio is equal to the second turns ratio.

[0021] Furthermore, the resistance values ​​of the first resistor and the second resistor are equal.

[0022] Furthermore, the ultrasonic driving device also includes:

[0023] The conduit matching module is used to identify the type of conduit connected to the transducer and select the matching network to access the transducer based on the type of conduit. The conduit is used to transmit the drive signal to the transducer.

[0024] Furthermore, the aforementioned ultrasonic driving device also includes:

[0025] The human-computer interaction module, connected to the control module, is used to provide an interactive interface for the user, which includes graphics and text.

[0026] In a second aspect, a method for adjusting an ultrasonic driving device is provided, for adjusting the ultrasonic driving device described in the first aspect above, so that the transducer reaches a preset power in a preset resonance state, the method comprising:

[0027] Acquire real-time sampling data, which includes: a first peak voltage signal acquired at the signal output port, a second peak voltage signal acquired at the cathode of the first diode, and a third peak voltage signal acquired at the cathode of the second diode;

[0028] Calculate the real-time impedance and voltage-current phase difference of the transducer based on real-time sampled data;

[0029] Based on the real-time impedance and voltage-current phase difference, the transducer is adjusted to a preset resonance state and reaches a preset power.

[0030] Furthermore, the real-time impedance and voltage-current phase difference of the transducer are calculated based on the real-time sampled data, including:

[0031] When the first turns ratio equals the second turns ratio, and the first resistor value equals the second resistor value,

[0032] Calculate the real-time impedance and voltage-current phase difference using the formula:

[0033]

[0034] Wherein, V1 is the value of the first peak voltage signal, V2 is the value of the second peak voltage signal, and V3 is the value of the third peak voltage signal. R is the resistance value of the first resistor R1 and the second resistor R2, N is the turns ratio of the voltage transformer T1 and the current transformer T2, Z is the value of the real-time impedance, and θ is the value of the voltage and current phase difference.

[0035] Furthermore, based on the real-time impedance and voltage-current phase difference, the transducer is adjusted to a preset resonant state and achieves a preset power, including:

[0036] Adjust the real-time impedance to the preset matching impedance;

[0037] The drive signal frequency is adjusted to the target frequency so that the transducer operates in a preset resonant state; where the target frequency is the drive signal frequency corresponding to the minimum voltage-current phase difference.

[0038] Adjust the active power output by the signal output module to the preset power.

[0039] Furthermore, the real-time impedance is adjusted to the preset matching impedance, including:

[0040] In response to the real-time impedance being less than the preset matching impedance, the DC bias voltage of the power amplifier is increased;

[0041] In response to the implementation impedance being greater than the preset matching impedance, the DC bias voltage of the power amplifier is reduced.

[0042] Further, adjusting the drive signal frequency to the target frequency includes:

[0043] The driving signal is swept to obtain the driving signal frequency corresponding to the minimum voltage-current phase difference, and the driving signal frequency corresponding to the minimum voltage-current phase difference is used as the target frequency.

[0044] Adjust the drive signal frequency to the target frequency so that the transducer operates in the preset resonant state.

[0045] Furthermore, adjusting the active power output by the signal output module to a preset power includes:

[0046] Adjust the output power of the power amplifier to make the active power output of the power amplifier reach the preset power.

[0047] Furthermore, the above method also includes the following:

[0048] Identify the type of conduit connecting the transducer;

[0049] Select the matching network for the transducer based on the type of conduit.

[0050] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0051] 1. Adjust the DC bias voltage of the power amplifier and the frequency of the drive signal of the signal generator in real time according to the real-time impedance and voltage-current phase difference to make the transducer work in a preset resonance state, thereby reducing the energy consumption of the equipment;

[0052] 2. Compared to the commonly used method of adjusting the impedance by adjusting the inductance value of an adjustable inductor and the capacitance value of an adjustable capacitor, this method is lower in cost and easier to implement.

[0053] 3. Match the impedance network of different conduits to make the real-time impedance of the transducer match the preset impedance. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of an ultrasonic driving device provided in an embodiment of the present invention;

[0056] Figure 2 This is a schematic diagram of the feedback module provided in an embodiment of the present invention;

[0057] Figure 3 This is a schematic diagram of an ultrasonic driving device including a catheter matching module provided in an embodiment of the present invention;

[0058] Figure 4 This is a schematic diagram of the catheter detection circuit for catheter identification provided in an embodiment of the present invention;

[0059] Figure 5 This is a schematic diagram of the matching network provided in an embodiment of the present invention;

[0060] Figure 6 This is a schematic diagram of an ultrasonic driving device including a human-computer interaction module provided in an embodiment of the present invention;

[0061] Figure 7 This is a schematic diagram of DC bias voltage adjustment for a power amplifier provided in an embodiment of the present invention;

[0062] Figure 8 This is a schematic diagram of an ultrasonic drive device adjustment method provided in an embodiment of the present invention;

[0063] Figure 9 This is a schematic diagram of the business logic for adjusting an ultrasonic drive device provided in an embodiment of the present invention. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0065] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The numbers in the accompanying drawings are only used to distinguish individual functional parts or modules and do not indicate logical relationships between parts or modules. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0066] For the component symbols involved in this application specification, the circuit diagram indicates the type of component and distinguishes each component, such as R1, R2, C, etc.; the corresponding formula represents the magnitude of the corresponding physical quantity of the component, which is distinguished by italics, for example: the resistance value corresponding to resistor R1 is R1.

[0067] The various embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repeated descriptions of them will be omitted.

[0068] In response to the problem in existing technologies where transducers deviate from their resonant state due to impedance changes caused by heat generation and balloon deformation during ultrasound ablation surgery, this invention provides an ultrasound driving device and its adjustment method to adjust the impedance of the transducer in real time and accurately, thereby reducing energy consumption and hardware costs. During ultrasound ablation surgery, the impedance is adjusted in real time according to the environmental factors of the transducer, so that the transducer operates in a resonant state, thus reducing energy consumption.

[0069] In one embodiment, an ultrasonic driving device, such as Figure 1 As shown, it includes:

[0070] The signal output module 100 generates a drive signal and transmits the drive signal to the transducer 200; wherein, the signal output module 100 includes: a signal generator 110 and a power amplifier 120; the signal output terminal 112 of the signal generator 110 is electrically connected to the first power amplifier port 121 of the power amplifier 120, and the second power amplifier port 122 of the power amplifier 120 serves as the signal output port 102; the drive signal is a sine wave signal;

[0071] The transducer 200 receives the drive signal and outputs mechanical energy according to the drive signal;

[0072] The feedback module 300 acquires the drive signal generated by the signal output module, as well as the real-time sampled data corresponding to the drive signal;

[0073] The control module 400 adjusts the drive signal transmitted from the signal output module 100 to the transducer 200 based on real-time sampled data, so that the active power of the drive signal reaches the preset power.

[0074] The control module 400 is the core control unit of the entire device. Its core is the control chip, which can be a microcontroller or an FPGA.

[0075] As described above, the transducer generates ultrasonic waves based on the received drive signal (usually a sinusoidal signal). Its energy conversion efficiency is highest in the resonant state. According to radio frequency transmission theory, to effectively transmit the signal to the transducer, the transducer impedance needs to be adjusted to a preset matching impedance, while simultaneously ensuring the transducer operates in a resonant state. Ideally, the real-time impedance in the preset resonant state equals the preset matching impedance, and the voltage and current phase difference is zero.

[0076] Therefore, accurately acquiring the real-time impedance and voltage-current phase difference of the transducer is crucial. The feedback module 300 disclosed in this embodiment of the invention can achieve accurate acquisition of the real-time impedance and voltage-current phase difference.

[0077] Specifically, such as Figure 2As shown, the feedback module 300 includes:

[0078] Voltage transformer T1, current transformer T2, first resistor R1, second resistor R2, first diode D1, second diode D2, first capacitor C1, second capacitor C2;

[0079] Voltage transformer first port T 11 Electrically connected to the signal output port 102 of the signal output module 100, the second port T of the voltage transformer 12 Electrically connected to the transducer input port 201 of transducer 200, and the third port T of voltage transformer. 13 Electrically connected to one end of the second resistor R2, the fourth port T of the voltage transformer 14 It is electrically connected to one end of the first resistor R1, and the first resistor R1 is connected in series with the second resistor R2;

[0080] The connection point between the first resistor R1 and the second resistor R2 is at the first port T of the current transformer. 21 Electrical connection, current transformer second port T 22 With the third port T of the current transformer 23 All are grounded, current transformer fourth port T 24 Electrically connected to signal output port 102;

[0081] The anode of the first diode D1 is electrically connected to one end of the first resistor R1, the anode of the second diode D2 is electrically connected to one end of the second resistor R2, the cathode of the first diode D1 is electrically connected to one end of the first capacitor C1, the cathode of the second diode D2 is electrically connected to one end of the second capacitor C2, the first capacitor C1 and the second capacitor C2 are connected in series, and the connection point of the first capacitor C1 and the second capacitor C2 is grounded.

[0082] The turns ratio of the primary winding to the secondary winding of the voltage transformer is the first turns ratio N1;

[0083] The turns ratio of the primary winding to the secondary winding of the current transformer is the second turns ratio N2;

[0084] Voltage transformer first port T 11 With the second port T of the voltage transformer 12 This is the primary side port of the voltage transformer;

[0085] Current transformer first port T 21 With the second port T of the current transformer 22 This is the primary side port of the current transformer.

[0086] Preferably, the first turns ratio N1 is equal to the second turns ratio N2.

[0087] Preferably, the resistance values ​​of the first resistor R1 and the second resistor R2 are equal.

[0088] The feedback module 300 acquires a first peak voltage signal V1 at the signal output port 102, a second peak voltage signal V2 at the cathode of the first diode D1, and a third peak voltage signal V3 at the cathode of the second diode D2. This is achieved through the following relationship:

[0089]

[0090] The real-time impedance Z and the voltage-current phase difference θ can be calculated. Here, V1 is the value of the first peak voltage signal, V2 is the value of the second peak voltage signal, and V3 is the value of the third peak voltage signal. R is the resistance value of the first resistor R1 and the second resistor R2, N is the turns ratio of the voltage transformer T1 and the current transformer T2, Z is the real-time impedance value, and θ is the voltage-current phase difference value.

[0091] The detailed derivation process is as follows:

[0092] The power amplifier has an output voltage of V0, an output current of I0, a peak output voltage of V1 (the first peak voltage signal), a real-time impedance of Z, a driving signal (sine wave) frequency of ω, and a voltage-current phase difference of θ. Therefore:

[0093] V0=V*sinωT

[0094]

[0095] The turns ratios of voltage transformer T1 and current transformer T2 are N1 and N2, respectively. Then, the output voltage of voltage transformer T1 is:

[0096]

[0097] The current output by current transformer T2 is:

[0098]

[0099] In this embodiment of the invention, the turns ratios of voltage transformer T1 and current transformer T2 are equal, N1 and N2 respectively, and the turns ratio value is N, N1=N2=N; the resistance values ​​of the first resistor R1 and the second resistor R2 are both R; and since the voltage and current phase difference θ does not change with time after the transducer is determined, it can be obtained that... Figure 2 The anode voltage V4 of the first diode D1 and the anode voltage V5 of the second diode D2, after being modified by the auxiliary angle formula, are as follows:

[0100]

[0101] The anode voltage V4 of the first diode D1 and the anode voltage V5 of the second diode D2, after being intercepted by the positive half-cycle signals of the first diode D1 and the second diode D2 respectively, charge the corresponding capacitors. Therefore, the cathode voltage V2 of the first diode D1 and the anode voltage V3 of the second diode D2 are low-voltage DC signals, and their amplitudes are equal to the peak values ​​of V4 and V5, respectively.

[0102]

[0103]

[0104] Preferably, the voltage values ​​V2 and V3 are acquired by the feedback module 300, linearly isolated, and converted from digital to analog signals to obtain digital signals, which can be further used to calculate the sum of squares and the difference of squares of the voltage values ​​V2 and V3.

[0105] If we take R / |Z| and cosθ as variables, we can obtain the above-mentioned relationship for solving the real-time impedance Z and the voltage-current phase difference θ.

[0106] Based on the real-time impedance Z and the voltage-current phase difference θ, the ultrasonic drive device can be adjusted to match the real-time impedance of the transducer with the preset matching impedance, thereby improving the transmission efficiency of the drive signal, adjusting the transducer to a resonant state, and improving the conversion efficiency of electrical energy into ultrasonic waves.

[0107] The transducer 200 is connected via a conduit, which transmits the drive signal to the transducer.

[0108] In another embodiment, the ultrasound driving device further includes: a catheter matching module 500, such as... Figure 3 As shown. The catheter matching module is used to identify the type of catheter connected to the transducer 200 and, based on the catheter type, select the matching network 520 to be connected to the transducer 200. The catheter matching module 500 includes: a catheter detection circuit 510 and a matching network 520. Figure 4 The principle of catheter detection circuit 510 for catheter identification is illustrated: a catheter can be equivalently represented as a resistor, and different types of catheters have different resistance distributions. Voltage signals are sampled from the catheter under DC voltage. Control module 400 correlates the sampled voltage with the catheter type, allowing catheter type identification based on the sampled voltage. Matching network 520 is an LC passive network, such as... Figure 5 As shown. After obtaining the catheter type, the control module 400 adjusts. Figure 5 The component values ​​in the matching network 520 shown can be used to match a suitable bandwidth for the catheter. Since each type of catheter has a corresponding matching network, the catheter matching module 500 can match a suitable bandwidth for the catheter.

[0109] In another embodiment, the ultrasonic driving device further includes a human-machine interface module 600. For example... Figure 6 As shown, the human-computer interaction module 600 is connected to the control module 400 and is used to provide an interactive interface to the user, which includes graphics and text.

[0110] Ultrasonic drive devices also include a human-computer interaction module, which includes, for example, a display component such as an LCD screen and supporting hardware drive circuitry, enabling user interaction through a graphical and text interface, a handle or foot switch component and supporting peripheral hardware circuitry, through which users can complete treatment start and stop commands.

[0111] Preferably, the ultrasonic drive device also includes a power supply module. The ultrasonic drive device is powered by an external power source (such as a 220VAC / 50Hz mains power supply). The power supply module converts the voltage to 28V DC voltage to provide power to other modules inside the device.

[0112] The ultrasonic driving device of this invention has two operating modes: standby and operating. In standby mode, the power amplifier, signal generator, feedback module, and transducer are all inactive. In this mode, the user can perform operations such as connecting catheters, configuring, and viewing treatment parameters. In operating mode, after the device starts ultrasonic ablation according to the user's instructions, the signal generator sends a drive signal to the power amplifier, which then sends it to the transducer via a matching network. The matching network automatically identifies and matches different catheters. The control chip acquires real-time sampling data via the feedback module and calculates the voltage and current phase difference and amplitude based on the real-time sampling data.

[0113] In another embodiment, an ultrasonic drive device adjustment method is provided for adjusting the ultrasonic drive device described in the first aspect above, so that the transducer 200 reaches a preset power in a preset resonance state.

[0114] Because the transducer impedance changes with temperature during actual operation, the output impedance of the power amplifier circuit needs to be adjusted in real time. The power amplifier uses a MOSFET as the amplifying transistor, and the DC bias voltage is specifically the gate-source DC bias voltage V. GS ,like Figure 7 As shown. For a MOSFET, with the DC bias voltage V GS As the conduction angle increases, the output power also initially increases and then decreases, and the impedance of the MOSFET also changes. When the ultrasonic drive equipment is working, the output impedance of the power amplifier is formed by the MOSFET and the inductance inside the power amplifier. After the MOSFET is selected, the drain-source current I of the MOSFET... DS and DC bias voltage V GS Related to the drain-source current I of the MOSFET DS With DC bias voltage V GS The drain-source voltage V of the MOSFET increases with the increase of [something]. DSTo keep the supply voltage constant, according to Ohm's law R = U / I, the DC bias voltage V is adjusted. GS This allows you to adjust the output impedance of the power amplifier, thereby regulating the overall output impedance of the transducer.

[0115] Adjusting the frequency of the drive signal of the signal generator is to regulate the voltage-current phase difference of the transducer to zero. Different frequencies of the drive signal will change the voltage-current phase difference of the transducer. When the voltage-current phase difference of the transducer is zero, that is, in a purely resistive resonance state, the efficiency of converting electrical energy into ultrasonic waves is the highest, and the heat generation is minimal. Therefore, this embodiment of the invention acquires the voltage-current phase difference of the transducer in real time and then adjusts the frequency of the drive signal of the signal generator in real time. When the voltage-current phase difference of the transducer increases, it can be detected and adjusted in time to keep the transducer operating in a resonant state where the voltage-current phase difference is zero.

[0116] The control method of the ultrasonic drive device in this embodiment of the invention obtains real-time sampling data of the power amplifier, calculates the real-time impedance and voltage-current phase difference of the transducer based on the real-time sampling data, and adjusts the DC bias voltage of the power amplifier and the frequency of the drive signal of the signal generator according to the real-time impedance and voltage-current phase difference to make the transducer work in a preset resonance state. This embodiment of the invention can keep the transducer working in a preset resonance state, can make the transducer output continuously and stably, and has the highest efficiency of converting electrical energy into ultrasonic waves.

[0117] like Figure 8 As shown, the method includes:

[0118] S100: Acquire real-time sampling data, wherein the real-time sampling data includes: a first peak voltage signal V1 acquired at the signal output port 102, a second peak voltage signal V2 acquired at the cathode of the first diode D1, and a third peak voltage signal V3 acquired at the cathode of the second diode D2.

[0119] S200: Calculates the real-time impedance and voltage-current phase difference of the transducer based on real-time sampled data;

[0120] S300: Based on the real-time impedance and voltage-current phase difference, the transducer 200 is adjusted to the preset resonance state and reaches the preset power.

[0121] Furthermore, the real-time impedance and voltage-current phase difference of the transducer are calculated based on the real-time sampled data, including:

[0122] When N1 = N2 = N and R1 = R2 = R,

[0123] Calculate the real-time impedance and voltage-current phase difference using the formula:

[0124]

[0125] Wherein, V1 is the value of the first peak voltage signal, V2 is the value of the second peak voltage signal, and V3 is the value of the third peak voltage signal. R is the resistance value of the first resistor R1 and the second resistor R2, N is the turns ratio of the voltage transformer T1 and the current transformer T2, Z is the value of the real-time impedance, and θ is the value of the voltage and current phase difference.

[0126] Specifically, based on the real-time impedance and voltage-current phase difference, the transducer 200 is adjusted to a preset resonant state and achieves a preset power, including:

[0127] S310: Adjusts the real-time impedance to the preset matching impedance;

[0128] S320: Adjust the drive signal frequency to the target frequency so that the transducer 200 operates in a preset resonant state; wherein, the target frequency is the drive signal frequency corresponding to the minimum voltage-current phase difference;

[0129] S330: Adjust the active power output by the signal output module 100 to the preset power.

[0130] Specifically, adjusting the real-time impedance to the preset matching impedance includes:

[0131] S311: In response to the real-time impedance being less than the preset matching impedance, increase the DC bias voltage of the power amplifier 120;

[0132] S311′: In response to the implementation impedance being greater than the preset matching impedance, reduce the DC bias voltage of the power amplifier 120.

[0133] To achieve the preset matching impedance, the real-time impedance must be equalized to the preset impedance. Based on the transducer's operating characteristics, the voltage-current phase difference is minimized when the real-time impedance and the preset matching impedance are identical. Therefore, impedance matching can be determined by whether the voltage-current phase difference reaches its minimum value. Furthermore, it's important to understand that when adjusting the DC bias voltage, the real-time current of the power amplifier must be monitored to prevent it from exceeding the amplifier's maximum current. The DC bias voltage must also not exceed the power amplifier's DC bias voltage adjustment range to protect it. If the DC bias voltage reaches the limit of the adjustment range, proceed directly to step S320. The DC bias voltage adjustment range is determined by the power amplifier's parameters, which can be obtained from its instruction manual. Figure 9 As shown.

[0134] Specifically, adjusting the drive signal frequency to the target frequency includes:

[0135] S321: Sweep the frequency of the drive signal to obtain the drive signal frequency corresponding to the minimum voltage-current phase difference, and take the drive signal frequency corresponding to the minimum voltage-current phase difference as the target frequency.

[0136] S322: Adjust the drive signal frequency to the target frequency so that the transducer 200 operates in the preset resonance state.

[0137] Different frequencies of the drive signal will change the phase difference between the voltage and current of the transducer. Therefore, the frequency of the drive signal can be adjusted to bring the transducer to a preset resonant state. For example, after acquiring the real-time voltage and current phase difference, it is determined whether the preset resonant state has been reached. If the preset resonant state has not been reached, the frequency of the drive signal is further increased, and the determination is made again until the preset resonant state is reached.

[0138] Since adjusting the DC bias voltage will cause the gain of the power amplifier to change, in order to keep the output of the power amplifier stable, the input power of the power amplifier needs to be adjusted accordingly to make its output power relatively stable.

[0139] Specifically, adjusting the active power output by the signal output module 100 to a preset power includes:

[0140] Adjust the output power of power amplifier 120 so that the active power output of power amplifier 120 reaches the preset power.

[0141] After the transducer is brought to a preset resonant state, the output power of the power amplifier is controlled to achieve the expected power, where the expected power is a pre-set value. After adjusting the frequency of the drive signal to bring the transducer to a preset resonant state, the output power of the power amplifier is controlled to achieve the expected power, thus maintaining a stable power output from the transducer.

[0142] The control module receives and processes real-time sampled data, and calculates the transducer's real-time impedance and voltage-current phase difference based on this data. The DC bias voltage of the power amplifier is adjusted to bring the real-time impedance to a preset matching impedance, at which point the voltage-current phase difference is minimized. While adjusting the DC bias voltage, the real-time current of the power amplifier needs to be monitored to prevent it from exceeding the amplifier's maximum current. Furthermore, the DC bias voltage must not exceed the power amplifier's adjustment range to protect it. When the voltage-current phase difference reaches its minimum or the DC bias voltage is adjusted to its limit, the frequency of the signal generator's drive signal is adjusted to bring the transducer to a preset resonant state. Since adjusting the DC bias voltage causes a change in the power amplifier's gain, the input power of the power amplifier needs to be adjusted accordingly to maintain a relatively stable output power.

[0143] After adjusting the frequency of the drive signal to bring the transducer to a preset resonant state, it is detected whether the output effective power reaches the expected level. If it does not reach the expected level, the output power of the power amplifier is controlled to make the output active power of the power amplifier reach the expected power, so that the transducer maintains a stable power output.

[0144] The adjustment method of this invention is lower in cost and easier to implement compared to existing methods for controlling adjustable inductor and capacitor values.

[0145] The above method also includes:

[0146] S010: Identify the type of conduit connecting to transducer 200;

[0147] S020: Select the matching network for the transducer 200 based on the type of conduit.

[0148] By implementing the ultrasonic driving device and its adjustment method disclosed in the embodiments of the present invention, the DC bias voltage of the power amplifier and the frequency of the driving signal of the signal generator can be adjusted in real time according to the real-time impedance and voltage-current phase difference, so that the transducer operates in a preset resonance state, thereby reducing the energy consumption of the device. Compared with the commonly used method of adjusting the impedance value of the adjustable inductor and the capacitance value of the adjustable capacitor, it is low in cost and easy to implement. According to the impedance matching network of different conduits, the real-time impedance of the transducer is matched with the preset impedance.

[0149] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of the present invention, and will not be described in detail here.

[0150] Example 1

[0151] An ultrasonic drive device, such as Figure 1 As shown, it includes:

[0152] The signal output module 100 generates a drive signal and transmits the drive signal to the transducer 200; wherein, the signal output module 100 includes: a signal generator 110 and a power amplifier 120; the signal output terminal 112 of the signal generator 110 is electrically connected to the first power amplifier port 121 of the power amplifier 120, and the second power amplifier port 122 of the power amplifier 120 serves as the signal output port 102; the drive signal is a sine wave signal;

[0153] The transducer 200 receives the drive signal and outputs mechanical energy according to the drive signal;

[0154] The feedback module 300 acquires the drive signal generated by the signal output module, as well as the real-time sampled data corresponding to the drive signal;

[0155] The control module 400 adjusts the drive signal transmitted from the signal output module 100 to the transducer 200 based on real-time sampled data, so that the active power of the drive signal reaches the preset power.

[0156] The control module 400 is the core control unit of the entire device. Its core is the control chip, which can be a microcontroller or an FPGA.

[0157] The feedback module 300 disclosed in this embodiment of the invention can achieve accurate acquisition of real-time impedance and voltage-current phase difference.

[0158] Specifically, such as Figure 2 As shown, the feedback module 300 includes:

[0159] Voltage transformer T1, current transformer T2, first resistor R1, second resistor R2, first diode D1, second diode D2, first capacitor C1, second capacitor C2;

[0160] Voltage transformer first port T 11 Electrically connected to the signal output port 102 of the signal output module 100, the second port T of the voltage transformer 12 Electrically connected to the transducer input port 201 of transducer 200, and the third port T of voltage transformer. 13 Electrically connected to one end of the second resistor R2, the fourth port T of the voltage transformer 14 It is electrically connected to one end of the first resistor R1, and the first resistor R1 is connected in series with the second resistor R2;

[0161] The connection point between the first resistor R1 and the second resistor R2 is at the first port T of the current transformer. 21 Electrical connection, current transformer second port T 22 With the third port T of the current transformer 23 All are grounded, current transformer fourth port T 24 Electrically connected to signal output port 102;

[0162] The anode of the first diode D1 is electrically connected to one end of the first resistor R1, the anode of the second diode D2 is electrically connected to one end of the second resistor R2, the cathode of the first diode D1 is electrically connected to one end of the first capacitor C1, the cathode of the second diode D2 is electrically connected to one end of the second capacitor C2, the first capacitor C1 and the second capacitor C2 are connected in series, and the connection point of the first capacitor C1 and the second capacitor C2 is grounded.

[0163] The turns ratio of the primary winding to the secondary winding of the voltage transformer is the first turns ratio N1;

[0164] The turns ratio of the primary winding to the secondary winding of the current transformer is the second turns ratio N2;

[0165] Voltage transformer first port T 11 With the second port T of the voltage transformer 12 This is the primary side port of the voltage transformer;

[0166] Current transformer first port T 21 With the second port T of the current transformer 22 This is the primary side port of the current transformer.

[0167] Preferably, the first turns ratio N1 is equal to the second turns ratio N2.

[0168] Preferably, the resistance values ​​of the first resistor R1 and the second resistor R2 are equal.

[0169] The feedback module 300 acquires a first peak voltage signal V1 at the signal output port 102, a second peak voltage signal V2 at the cathode of the first diode D1, and a third peak voltage signal V3 at the cathode of the second diode D2. This is achieved through the following relationship:

[0170]

[0171] The real-time impedance Z and the voltage-current phase difference θ can be calculated. Here, V1 is the value of the first peak voltage signal, V2 is the value of the second peak voltage signal, and V3 is the value of the third peak voltage signal. R is the resistance value of the first resistor R1 and the second resistor R2, N is the turns ratio of the voltage transformer T1 and the current transformer T2, Z is the real-time impedance value, and θ is the voltage-current phase difference value.

[0172] Based on the real-time impedance Z and the voltage-current phase difference θ, the ultrasonic drive device can be adjusted to match the real-time impedance of the transducer with the preset matching impedance, thereby improving the transmission efficiency of the drive signal, adjusting the transducer to a resonant state, and improving the conversion efficiency of electrical energy into ultrasonic waves.

[0173] Example 2

[0174] Based on the ultrasonic driving device described in Embodiment 1, this embodiment further includes a catheter matching module 500. The transducer 200 is connected via a catheter, which transmits the driving signal to the transducer. Matching the catheter can improve signal transmission efficiency. Figure 3 As shown, the catheter matching module is used to identify the type of catheter connected to the transducer 200 and select the matching network 520 connected to the transducer 200 according to the catheter type. The catheter matching module 500 includes: a catheter detection circuit 510 and a matching network 520. Figure 4The principle of the catheter detection circuit 510 for catheter identification is illustrated: a catheter can be represented as a resistor, and different types of catheters have different resistance distributions. By sampling the voltage signal of the catheter under DC voltage, the catheter type can be identified. The matching network 520 is an LC passive network, such as... Figure 5 As shown. After obtaining the catheter type, adjust... Figure 5 The component values ​​in the matching network 520 shown can be used to match a suitable bandwidth for the catheter. Since each type of catheter has a corresponding matching network, the catheter matching module 500 can match a suitable bandwidth for the catheter.

[0175] Example 3

[0176] Based on the foregoing embodiments, the ultrasonic driving device further includes a human-machine interaction module 600. For example... Figure 6 As shown, the human-computer interaction module 600 is connected to the control module 400 and is used to provide an interactive interface to the user, which includes graphics and text.

[0177] Ultrasonic drive devices also include a human-computer interaction module, which includes, for example, a display component such as an LCD screen and supporting hardware drive circuitry, enabling user interaction through a graphical and text interface, a handle or foot switch component and supporting peripheral hardware circuitry, through which users can complete treatment start and stop commands.

[0178] Example 4

[0179] An adjustment method for an ultrasonic drive device, such as Figure 8 As shown, it includes:

[0180] S100: Acquire real-time sampling data, wherein the real-time sampling data includes: a first peak voltage signal V1 acquired at the signal output port 102, a second peak voltage signal V2 acquired at the cathode of the first diode D1, and a third peak voltage signal V3 acquired at the cathode of the second diode D2.

[0181] S200: Calculates the real-time impedance and voltage-current phase difference of the transducer based on real-time sampled data;

[0182] S300: Based on the real-time impedance and voltage-current phase difference, the transducer 200 is adjusted to the preset resonance state and reaches the preset power.

[0183] Example 5

[0184] An adjustment method for an ultrasonic drive device, specifically comprising:

[0185] S010: Identify the type of conduit connecting to transducer 200;

[0186] S020: Select the matching network for the transducer 200 based on the type of conduit.

[0187] S100: Acquire real-time sampling data, wherein the real-time sampling data includes: a first peak voltage signal V1 acquired at the signal output port 102, a second peak voltage signal V2 acquired at the cathode of the first diode D1, and a third peak voltage signal V3 acquired at the cathode of the second diode D2.

[0188] S200: Calculates the real-time impedance and voltage-current phase difference of the transducer based on real-time sampled data;

[0189] Specifically, including:

[0190] When N1 = N2 = N and R1 = R2 = R,

[0191] Calculate the real-time impedance and voltage-current phase difference using the formula:

[0192]

[0193] Wherein, V1 is the value of the first peak voltage signal, V2 is the value of the second peak voltage signal, and V3 is the value of the third peak voltage signal. R is the resistance value of the first resistor R1 and the second resistor R2, N is the turns ratio of the voltage transformer T1 and the current transformer T2, Z is the value of the real-time impedance, and θ is the value of the voltage and current phase difference.

[0194] S300: Based on the real-time impedance and voltage-current phase difference, the transducer 200 is adjusted to the preset resonance state and reaches the preset power.

[0195] S310: Adjusts the real-time impedance to the preset matching impedance;

[0196] S311: In response to the real-time impedance being less than the preset matching impedance, increase the DC bias voltage of the power amplifier 120;

[0197] S311′: In response to the implementation impedance being greater than the preset matching impedance, reduce the DC bias voltage of the power amplifier 120.

[0198] S320: Adjust the drive signal frequency to the target frequency so that the transducer 200 operates in a preset resonant state; wherein, the target frequency is the drive signal frequency corresponding to the minimum voltage-current phase difference;

[0199] S321: Sweep the frequency of the drive signal to obtain the drive signal frequency corresponding to the minimum voltage-current phase difference, and take the drive signal frequency corresponding to the minimum voltage-current phase difference as the target frequency.

[0200] S322: Adjust the drive signal frequency to the target frequency so that the transducer 200 operates in the preset resonance state.

[0201] S330: Adjusts the active power output by signal output module 100 to a preset power. Includes:

[0202] Adjust the output power of power amplifier 120 so that the active power output of power amplifier 120 reaches the preset power.

[0203] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program loaded on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from memory, or installed from ROM. When the computer program is executed by an external processor, it performs the functions defined in the methods of embodiments of this application.

[0204] It should be noted that the computer-readable medium in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the embodiments of this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the embodiments of this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (Radio Frequency), etc., or any suitable combination thereof.

[0205] The aforementioned computer-readable medium may be included in the aforementioned server; or it may exist independently and not assembled into the server. The aforementioned computer-readable medium carries one or more programs that, when executed by the server, cause the server to: in response to detecting that the peripheral mode of the terminal is not activated, acquire the frame rate of the application on the terminal; when the frame rate meets the screen-off condition, determine whether the user is acquiring the terminal's screen information; and in response to the determination that the user is not acquiring the terminal's screen information, control the screen to enter an immediate dimming mode.

[0206] Computer program code for performing the operations of the embodiments of this application can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0207] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0208] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

[0209] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ultrasonic driving device, characterized in that, The device includes: A signal output module generates a drive signal and transmits the drive signal to a transducer; wherein, the signal output module includes a signal generator and a power amplifier; the signal output terminal of the signal generator is electrically connected to the first power amplifier port of the power amplifier, and the second power amplifier port of the power amplifier serves as the signal output port; the drive signal is a sine wave signal; A transducer receives the drive signal and outputs mechanical energy according to the drive signal; The feedback module acquires the drive signal generated by the signal output module, as well as the real-time sampled data corresponding to the drive signal; The control module adjusts the drive signal transmitted from the signal output module to the transducer based on the real-time sampling data, so that the active power of the drive signal reaches the preset power. The feedback module includes: Voltage transformer, current transformer, first resistor, second resistor, first diode, second diode, first capacitor, second capacitor; The first port of the voltage transformer is electrically connected to the signal output port of the signal output module, the second port of the voltage transformer is electrically connected to the transducer input port of the transducer, the third port of the voltage transformer is electrically connected to one end of the second resistor, and the fourth port of the voltage transformer is electrically connected to one end of the first resistor. The first resistor and the second resistor are connected in series. The connection point between the first resistor and the second resistor is electrically connected to the first port of the current transformer. The second and third ports of the current transformer are both grounded, and the fourth port of the current transformer is electrically connected to the signal output port. The anode of the first diode is electrically connected to one end of the first resistor, the anode of the second diode is electrically connected to one end of the second resistor, the cathode of the first diode is electrically connected to one end of the first capacitor, the cathode of the second diode is electrically connected to one end of the second capacitor, the first capacitor and the second capacitor are connected in series, and the connection point between the first capacitor and the second capacitor is grounded.

2. The ultrasonic driving device according to claim 1, characterized in that, The turns ratio of the primary winding to the secondary winding of the voltage transformer is the first turns ratio; The turns ratio of the primary winding to the secondary winding of the current transformer is the second turns ratio; The first port and the second port of the voltage transformer are the primary side ports of the voltage transformer; The first port and the second port of the current transformer are the primary side ports of the current transformer.

3. The ultrasonic driving device according to claim 2, characterized in that, The first turns ratio is equal to the second turns ratio.

4. The ultrasonic driving device according to claim 1, characterized in that, The resistance values ​​of the first resistor and the second resistor are equal.

5. An ultrasonic driving device according to claim 1, characterized in that, The device also includes: The conduit matching module is used to identify the type of conduit connected to the transducer and select a matching network to access the transducer based on the type of conduit, wherein the conduit is used to transmit the drive signal to the transducer.

6. An ultrasonic driving device according to any one of claims 1-5, characterized in that, The device also includes: A human-computer interaction module, connected to the control module, is used to provide an interactive interface to the user, the interactive interface including graphics and text.

7. A method for adjusting an ultrasonic drive device, used to adjust the ultrasonic drive device according to any one of claims 1-6, so that the transducer reaches a preset power in a preset resonance state, characterized in that, The method includes: Acquire real-time sampling data, wherein the real-time sampling data includes: a first peak voltage signal acquired at the signal output port, a second peak voltage signal acquired at the cathode of the first diode, and a third peak voltage signal acquired at the cathode of the second diode; Calculate the real-time impedance and voltage-current phase difference of the transducer based on the real-time sampled data; Based on the real-time impedance and the voltage-current phase difference, the transducer is adjusted to a preset resonance state and reaches a preset power.

8. The method for adjusting an ultrasonic drive device according to claim 7, characterized in that, The calculation of the real-time impedance and voltage-current phase difference of the transducer based on the real-time sampled data includes: When the first turns ratio equals the second turns ratio, and the first resistor value equals the second resistor value, Calculate the real-time impedance and the voltage-current phase difference according to the formula: ； in, V 1 represents the value of the first peak voltage signal. V 2 represents the value of the second peak voltage signal. V 3 represents the value of the third peak voltage signal. R Let R1 be the resistance value of the first resistor and R2 be the resistance value of the second resistor. N This refers to the turns ratio of the voltage transformer T1 and the current transformer T2. Z This refers to the value of the real-time impedance. θ This represents the numerical value of the phase difference between the voltage and current.

9. The method for adjusting an ultrasonic drive device according to claim 7, characterized in that, The step of adjusting the transducer to a preset resonant state and achieving a preset power based on the real-time impedance and the voltage-current phase difference includes: Adjust the real-time impedance to the preset matching impedance; The driving signal frequency is adjusted to the target frequency so that the transducer operates in a preset resonant state; wherein, the target frequency is the driving signal frequency corresponding to the minimum voltage-current phase difference; Adjust the active power output by the signal output module to the preset power.

10. The method for adjusting an ultrasonic drive device according to claim 9, characterized in that, The step of adjusting the real-time impedance to a preset matching impedance includes: In response to the real-time impedance being less than the preset matching impedance, the DC bias voltage of the power amplifier is increased; In response to the real-time impedance being greater than the preset matching impedance, the DC bias voltage of the power amplifier is reduced.

11. The method for adjusting an ultrasonic drive device according to claim 9, characterized in that, Adjusting the drive signal frequency to the target frequency includes: The driving signal is swept to obtain the driving signal frequency corresponding to the minimum voltage-current phase difference, and the driving signal frequency corresponding to the minimum voltage-current phase difference is used as the target frequency. The frequency of the driving signal is adjusted to the target frequency, so that the transducer operates in the preset resonant state.

12. The method for adjusting an ultrasonic drive device according to claim 9, characterized in that, Adjusting the active power output by the signal output module to a preset power includes: Adjust the output power of the power amplifier so that the active power output by the power amplifier reaches the preset power.

13. A method for adjusting an ultrasonic drive device according to any one of claims 7-12, characterized in that, The method is preceded by: Identify the type of conduit connecting the transducer; Select a matching network for the transducer based on the type of the conduit.

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