Output frequency control method of an ultrasound apparatus and ultrasound apparatus

Abstract

The application relates to the technical field of ultrasonic therapy, and provides an output frequency control method of an ultrasonic device and the ultrasonic device. The ultrasonic device samples a first voltage value of a forward electric signal and a second voltage value of a reverse electric signal, calculates a first function value of a target relationship function at a current moment according to a forward characteristic value and a reverse characteristic value at the current moment, compares the first function value and a second function value according to the comparison, and / or compares a characteristic value change difference and a derivative result of the second function value, so as to update a real-time output frequency of the ultrasonic device at a next moment. The ultrasonic device can obtain the difference between the real-time output frequency of the energy conversion device and the initial resonance frequency by only sampling the first voltage value and the second voltage value, can accurately adjust the real-time output frequency of the host, can ensure that the conversion of the ultrasonic signal is always in an efficient state, can significantly reduce the sampling data amount, and can improve the frequency adjustment efficiency.

Description

Technical Field

[0001] This application relates to the field of ultrasonic equipment, and more particularly to an output frequency control method for ultrasonic equipment and ultrasonic equipment. Background Technology

[0002] During the operation of ultrasound equipment, the built-in ultrasound transducer converts the electrical signal emitted by the ultrasound equipment into an ultrasound signal. After the ultrasound signal is focused by a specific acoustic lens or focusing device, it can be accurately applied to the target lesion area of ​​the human body.

[0003] The initial resonant frequency of an ultrasonic device is a key parameter for achieving efficient energy conversion in an ultrasonic transducer. The transducer converts the electrical signal into an ultrasonic signal with the highest efficiency when the output frequency of the electrical signal emitted by the ultrasonic device is the same as the initial resonant frequency. However, in practical applications, the real-time output frequency of the ultrasonic device may drift due to factors such as device aging and heat generation during operation, resulting in a difference between the real-time output frequency and the initial resonant frequency, thus affecting the ultrasonic signal conversion efficiency.

[0004] Traditional ultrasound equipment requires high-speed sampling circuits to sample the electrical signal output by the equipment. The real-time output frequency is then adjusted based on the sampled data to match the initial resonant frequency. However, according to the Nyquist sampling theorem, to obtain the signal frequency, voltage, or current value through Fourier transform, the sampling frequency of the high-speed sampling circuit must be several or even tens of times the output frequency of the electrical signal. This results in a massive amount of sampled data, affecting the efficiency of frequency adjustment and significantly increasing system overhead and cost. Summary of the Invention

[0005] This application provides an output frequency control method and an ultrasonic device, which reduces the amount of sampled data and improves the efficiency of adjusting the output frequency when the output frequency of the electrical signal of the ultrasonic device is adjusted.

[0006] The first aspect of this application provides an output frequency control method for an ultrasonic device, applied to the ultrasonic device, which includes a main unit and an energy conversion device, the method comprising:

[0007] The first voltage value of the positive electrical signal and the second voltage value of the negative electrical signal are sampled. The positive electrical signal is the electrical signal output by the host to the energy conversion device according to the real-time output frequency, and the negative electrical signal is the electrical signal reflected back to the host after the energy conversion device converts the positive electrical signal into an ultrasonic signal.

[0008] Calculate the positive eigenvalue corresponding to the first voltage value, and calculate the reverse eigenvalue corresponding to the second voltage value;

[0009] Based on the positive eigenvalue and the negative eigenvalue at the current moment, calculate the first function value of the target relation function at the current moment. The target relation function is used to characterize the functional relationship between the ratio of the negative eigenvalue and the positive eigenvalue. The first function value is used to characterize the real-time output frequency of the ultrasonic device at the current moment.

[0010] Calculate the second function value, which is the function value of the target relational function at the initial resonant frequency;

[0011] Adjust the real-time output frequency of the ultrasound device at the next moment based on the first function value and the second function value at the current moment;

[0012] And / or,

[0013] The real-time output frequency of the ultrasonic device at the next moment is adjusted based on the derivative of the ratio of eigenvalue changes and the second function value; wherein, the ratio of eigenvalue changes is the ratio of the reverse eigenvalue at the current moment to the reverse eigenvalue at the previous moment, and the positive eigenvalue at the current moment to the positive eigenvalue at the previous moment.

[0014] In one implementation, the step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the first function value and the second function value at the current moment includes:

[0015] Set the first deviation control factor and frequency adjustment amount, where the frequency adjustment is the unit adjustment amount of the real-time output frequency;

[0016] If the first function value is greater than the sum of the second function value and the first deviation control factor, the real-time output frequency of the ultrasonic device at the next moment will be adjusted to the difference between the current frequency and the frequency adjustment amount.

[0017] If the first function value is less than or equal to the difference between the second function value and the first deviation control factor, the real-time output frequency of the ultrasound device at the next moment will be adjusted to the sum of the current frequency and the frequency adjustment amount.

[0018] In one implementation, the step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the derivative of the ratio of the eigenvalue changes and the second function value includes:

[0019] Set a second deviation control factor and a frequency adjustment amount, where the frequency adjustment is the unit adjustment amount of the real-time output frequency;

[0020] If the ratio of the change in eigenvalues ​​is greater than the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasonic device at the next moment will be adjusted to the difference between the current frequency and the frequency adjustment amount.

[0021] If the ratio of the change in eigenvalues ​​is less than or equal to the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasound device at the next moment will be adjusted to the sum of the current frequency and the frequency adjustment amount.

[0022] In one implementation, after adjusting the real-time output frequency of the ultrasound device at the next moment based on the first function value and the second function value at the current moment, the method further includes:

[0023] Calculate the adjusted first function value based on the adjusted real-time output frequency;

[0024] Calculate the difference between the adjusted first function value and the second function value;

[0025] If the absolute value of the first function difference is less than or equal to the first deviation control factor, stop adjusting the real-time output frequency of the ultrasound equipment.

[0026] In one implementation, after adjusting the real-time output frequency of the ultrasonic device at the next moment based on the derivative of the eigenvalue change ratio and the second function value, the method further includes:

[0027] Calculate the second function difference between the ratio of the eigenvalue changes between every two adjacent time points and the derivative of the second function value;

[0028] If the absolute value of the difference in the second function is less than or equal to the second deviation control factor, stop adjusting the real-time output frequency of the ultrasound equipment.

[0029] In some embodiments, the step of sampling a first voltage value of a forward electrical signal and a second voltage value of a reverse electrical signal includes:

[0030] The ultrasonic equipment's conversion circuit converts the positive and negative electrical signals into positive and negative DC signals, respectively.

[0031] The forward DC signal is sampled to obtain a first voltage value, and the reverse DC signal is sampled to obtain a second voltage value.

[0032] In one implementation, the steps of calculating the positive eigenvalue corresponding to the first voltage value and the reverse eigenvalue corresponding to the second voltage value include:

[0033] The impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic equipment are obtained. The impedance characteristic function is used to characterize the relationship between the impedance of the ultrasonic equipment and the real-time output frequency. The system characteristic impedance is a fixed impedance preset based on the initial resonant frequency.

[0034] Based on the impedance characteristic function, system characteristic impedance, resistance value, forward coupling conversion coefficient and first voltage value, the forward characteristic value is calculated. The forward coupling conversion coefficient is the product of the conversion function and the forward coupling coefficient, which is the circuit coupling coefficient when the host outputs a forward electrical signal.

[0035] as well as,

[0036] Based on the impedance characteristic function, system characteristic impedance, resistance value, reverse coupling conversion coefficient, and second voltage value, the reverse characteristic value is calculated. The reverse coupling conversion coefficient is the product of the conversion function and the reverse coupling coefficient, which is the circuit coupling coefficient when the host receives the reverse electrical signal.

[0037] In one implementation, the steps of obtaining the impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic device include:

[0038] To obtain the inductive reactance and capacitive reactance of the ultrasonic equipment, and to measure the system characteristic impedance and resistance of the ultrasonic equipment;

[0039] The impedance characteristic function is calculated based on the inductive reactance, capacitive reactance, and real-time output frequency.

[0040] In some embodiments, prior to the step of calculating the positive characteristic value of the first voltage value based on the impedance characteristic function, system characteristic impedance, resistance value, and forward coupling conversion coefficient, the method includes:

[0041] Obtain the bandwidth coefficient of the host's conversion circuit;

[0042] The conversion function is calculated based on the bandwidth factor and the real-time output frequency.

[0043] A second aspect of this application provides an ultrasonic device for executing the output frequency control method of the ultrasonic device provided in the first aspect, including:

[0044] Main unit and energy conversion device,

[0045] The main unit includes a power module, an output sensing module, and an output control module that are coupled together.

[0046] The power module is configured to output a positive electrical signal to the energy conversion device, and to receive an electrical signal reflected back to the host after the energy conversion device converts the positive electrical signal into an ultrasonic signal;

[0047] The output sensing module is configured to sample a first voltage value of a positive electrical signal and a second voltage value of a negative electrical signal;

[0048] The output control module is configured to calculate the positive characteristic value corresponding to the first voltage value, and to calculate the reverse characteristic value corresponding to the second voltage value;

[0049] Based on the positive eigenvalue and the negative eigenvalue at the current moment, calculate the first function value of the target relation function at the current moment. The target relation function is used to characterize the functional relationship between the ratio of the negative eigenvalue and the positive eigenvalue. The first function value is used to characterize the real-time output frequency of the ultrasonic device at the current moment.

[0050] Calculate the second function value, which is the function value of the target relational function at the initial resonant frequency;

[0051] Adjust the real-time output frequency of the ultrasound device at the next moment based on the first function value and the second function value at the current moment;

[0052] And / or,

[0053] The real-time output frequency of the ultrasonic device at the next moment is adjusted based on the derivative of the ratio of eigenvalue changes and the second function value; wherein, the ratio of eigenvalue changes is the ratio of the reverse eigenvalue at the current moment to the reverse eigenvalue at the previous moment, and the positive eigenvalue at the current moment to the positive eigenvalue at the previous moment.

[0054] The energy conversion device is configured to convert a positive electrical signal into an ultrasonic signal and output the ultrasonic signal to the outside of the ultrasonic equipment.

[0055] In one implementation, the output sensing module includes a coupled sensing circuit, a conversion circuit, and a sampling circuit connected in series.

[0056] The coupling sensing circuit is configured to output positive and negative electrical signals according to a preset circuit coupling coefficient;

[0057] The conversion circuit is configured to convert the positive electrical signal and the negative electrical signal into a positive DC signal and a negative DC signal, respectively.

[0058] The sampling circuit is configured to sample a forward DC signal to obtain a first voltage value, and to sample a reverse DC signal to obtain a second voltage value.

[0059] In one implementation, the host also includes an impedance matching circuit, which is configured to acquire the impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic device. The impedance characteristic function is used to characterize the relationship between the impedance of the ultrasonic device and the real-time output frequency, and the system characteristic impedance is a fixed impedance preset based on the initial resonant frequency.

[0060] In one implementation, the energy conversion device includes a handle and a treatment head, which are detachably connected. An ultrasonic transducer is disposed inside the treatment head and is configured to convert a positive electrical signal into an ultrasonic signal and output the ultrasonic signal to the outside of the ultrasonic device.

[0061] As can be seen from the above technical solutions, the embodiments of this application provide an output frequency control method and an ultrasonic device. The ultrasonic device samples a first voltage value of a forward electrical signal and a second voltage value of a reverse electrical signal, and calculates a first function value of the target relationship function at the current moment based on the forward and reverse characteristic values. Then, it compares the first function value with the second function value, and / or compares the difference in characteristic value changes with the derivative of the second function value to update the real-time output frequency of the ultrasonic device at the next moment. This allows the ultrasonic device to obtain the difference between the real-time output frequency of the energy conversion device and the initial resonant frequency in real time by sampling only the first and second voltage values, and to accurately adjust the real-time output frequency of the host, ensuring that the conversion of the ultrasonic signal is always in a high-efficiency state, significantly reducing the amount of sampling data, and improving the frequency adjustment efficiency. Attached Figure Description

[0062] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 Structural diagrams of ultrasonic devices provided for some embodiments of this application;

[0064] Figure 2 A flowchart illustrating the method for controlling the output frequency of an ultrasonic device according to an embodiment of this application;

[0065] Figure 3 This is a flowchart illustrating the voltage value sampling process performed by an ultrasonic device, as provided in an embodiment of this application.

[0066] Figure 4 A flowchart illustrating a first embodiment of adjusting the real-time output frequency of an ultrasonic device provided in some embodiments of this application;

[0067] Figure 5 A flowchart illustrating a second embodiment of adjusting the real-time output frequency of an ultrasonic device provided in some embodiments of this application;

[0068] Figure 6 A flowchart illustrating the calculation of forward and reverse eigenvalues ​​of an ultrasonic device provided in an embodiment of this application;

[0069] Figure 7 Flowcharts for acquiring circuit parameters of an ultrasonic device provided in some embodiments of this application;

[0070] Figure 8 A flowchart illustrating the acquisition of a transformation function by an ultrasonic device is provided for some embodiments of this application;

[0071] Figure 9 This application provides a block diagram of the content module structure of an ultrasonic device according to some embodiments.

[0072] Figure 10 Internal circuit diagrams of ultrasonic devices provided in some embodiments of this application;

[0073] Figure 11 This is a structural diagram of the energy conversion device of an ultrasonic device provided in some embodiments of this application.

[0074] Figure Descriptions: 10-Ultrasound equipment; 100-Main unit; 110-Power module; 111-Power amplifier circuit; 120-Output sensing module; 121-Coupled sensing circuit; 122-Conversion circuit; 123-Sampling circuit; 130-Output control module; 140-Impedance matching circuit; 150-Equivalent circuit model; 200-Energy conversion device; 210-Handle; 211-Internal circuit module; 212-Handle housing; 220-Treatment head; 221-Ultrasound transducer; 222-Treatment head housing. Detailed Implementation

[0075] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0076] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0077] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0078] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0079] Ultrasound medical technology is a therapeutic technique that utilizes the physical characteristics of ultrasound signals (also known as ultrasonic waves) such as mechanical vibration, thermal effects, and cavitation effects to act on human tissues, thereby treating diseases or alleviating their symptoms. In clinical applications, ultrasound equipment can convert the output electrical signal into a specific frequency ultrasound signal and focus it on the lesion area under the skin to achieve non-invasive or minimally invasive treatment effects.

[0080] During operation, ultrasound equipment converts the output electrical signal into an ultrasonic signal using its built-in ultrasonic transducer, and then focuses this ultrasonic signal onto the target lesion area in the human body. The initial resonant frequency of the ultrasound equipment is a key parameter for achieving efficient energy conversion. The initial resonant frequency is the natural frequency at which the ultrasonic transducer resonates with its mechanical vibration system in a free-vibrating state. When the output frequency of the electrical signal matches the resonant frequency, the ultrasonic transducer can convert the electrical signal into an ultrasonic signal with minimal energy loss, thereby improving the efficiency of energy conversion.

[0081] However, in the actual application of ultrasonic equipment, the real-time output frequency of the ultrasonic equipment will drift due to various factors. For example, temperature changes of the ultrasonic transducer during operation and aging of the ultrasonic transducer due to long-term operation will cause changes in the real-time output frequency of the ultrasonic transducer, resulting in a frequency difference between the real-time output frequency and the resonant frequency of the electrical signal, which will affect the conversion efficiency of the ultrasonic signal.

[0082] Therefore, based on the characteristic of frequency drift in real-time output frequency, ultrasonic equipment continuously adjusts the real-time output frequency of the electrical signal to ensure that it matches the initial resonant frequency, thus guaranteeing that the ultrasonic signal conversion remains highly efficient. Traditional ultrasonic equipment requires high-speed sampling circuits to synchronously sample the real-time output frequency of the electrical signal. The sampling frequency is several or tens of times the real-time output frequency. If the real-time output frequency is between one and ten megahertz, the sampling frequency is between tens and hundreds of megahertz, resulting in a large amount of real-time sampling data. Then, complex algorithm models are used to analyze and calculate the sampling data in real time to determine the amount of real-time output frequency drift and adjust the real-time output frequency accordingly. This complex adjustment method affects the efficiency of adjusting the real-time output frequency.

[0083] Based on this, some embodiments of this application provide an output frequency control method for an ultrasonic device, which is applied to an ultrasonic device. To facilitate the subsequent description of the output frequency control method for the ultrasonic device, the device structure of the ultrasonic device will be described first below.

[0084] Figure 1 Structural diagrams of an ultrasonic device provided for some embodiments of this application. See also... Figure 1The ultrasound device 10 may include a main unit 100 and an energy conversion device 200. The main unit 100 is used to output electrical signals to the energy conversion device 200 according to a real-time output frequency. The main unit 100 may include a power module 110, an output sensing module 120, and an output control module 130, which are coupled to each other. The power module 110 is used to output electrical signals according to a real-time output frequency, the output sensing module 120 is used to sample the voltage value of the electrical signals, and the output control module 130 is used to adjust the magnitude of the real-time output frequency. The energy conversion device 200 is used to convert the received electrical signals into ultrasound signals and output the ultrasound signals to the outside of the ultrasound device 10. The energy conversion device 200 may include a treatment head 220 and a handle 210. The treatment head 220 and the handle 210 are detachably connected so that the operator can hold the energy conversion device 200 and output ultrasound signals through the treatment head 220.

[0085] Figure 2 A flowchart illustrating the output frequency control method of the ultrasonic device provided in this embodiment of the application. See also... Figure 2 The method includes:

[0086] S100: Samples the first voltage value of the forward electrical signal and the second voltage value of the reverse electrical signal.

[0087] The forward electrical signal is the electrical signal output by the host 100 to the energy conversion device 200 according to the real-time output frequency. The reverse electrical signal is the electrical signal reflected back to the host 100 after the energy conversion device 200 converts the forward electrical signal into an ultrasonic signal. The ultrasonic device 10 can sample the forward electrical signal and the reverse electrical signal through the output sensing module 120 to obtain a first voltage value and a second voltage value, respectively.

[0088] Since the forward and reverse electrical signals are alternating current (AC) signals, their voltage values ​​will change periodically over time. Directly sampling the first and second voltage values ​​cannot accurately reflect the actual state of the signal. Therefore, it is necessary to convert the forward and reverse electrical signals into direct current (DC) signals before sampling the voltage values.

[0089] Figure 3 This is a flowchart illustrating the voltage value sampling process performed by an ultrasonic device according to an embodiment of this application.

[0090] See Figure 3 The method for sampling voltage values ​​using an ultrasonic device may include steps S110-S120.

[0091] S110: The conversion circuit of the ultrasonic equipment converts the positive and negative electrical signals into positive and negative DC electrical signals, respectively.

[0092] The output sensing module 120 may include a coupled sensing circuit, a root mean square (RMS) conversion circuit, and an ADC sampling circuit connected in series. The coupled sensing circuit is used to acquire positive and negative electrical signals, the RMS conversion circuit is used to convert AC signals into DC signals through a conversion function, and the analog-to-digital converter (ADC) sampling circuit is used to sample voltage values.

[0093] Based on the circuit structure of the output sensing module 120 described above, the ultrasonic device 10 can obtain the conversion function of the RMS conversion circuit. The conversion function is a mathematical function set by the RMS conversion circuit based on the mathematical definition of the root mean square value. The RMS conversion circuit can convert the effective value of the AC signal into the corresponding DC voltage value through the conversion function.

[0094] After the coupling induction circuit acquires the forward and reverse electrical signals, the forward and reverse electrical signals can be input into the RMS conversion circuit, respectively. The RMS conversion circuit can convert the forward electrical signal into a forward DC signal and the reverse electrical signal into a reverse DC signal.

[0095] In some embodiments, during the process of converting to obtain a positive DC signal, the RMS conversion circuit can obtain the first instantaneous value of the positive signal, and then perform squaring and integration calculations on the first instantaneous value through the conversion function to obtain the first average value. Finally, the square root of the first average value is calculated to obtain the DC voltage corresponding to the positive DC signal.

[0096] In some embodiments, during the process of converting to obtain a reverse DC signal, the RMS conversion circuit can obtain the second instantaneous value of the reverse signal, and then perform squaring and integration calculations on the second instantaneous value through the conversion function to obtain the second average value. Finally, the square root of the second average value is calculated to obtain the DC voltage corresponding to the reverse DC signal.

[0097] S120: Sample the forward DC signal to obtain a first voltage value, and sample the reverse DC signal to obtain a second voltage value.

[0098] After converting the forward electrical signal into a forward DC signal, the output sensing module 120 can sample the first voltage value of the forward DC signal through the ADC sampling circuit. After converting the reverse electrical signal into a reverse DC signal, the output sensing module 120 can sample the second voltage value of the reverse DC signal through the ADC sampling circuit.

[0099] In some embodiments, since this embodiment only needs to sample the first voltage value and the second voltage value, in order to save equipment costs and improve conversion efficiency, the ADC sampling circuit can be a low-speed ADC sampling circuit.

[0100] Based on the above technical solutions, this embodiment converts AC signals into DC signals through the conversion circuit of the ultrasonic equipment, and samples the converted positive and negative DC signals, simplifying the voltage sampling process, reducing the complexity of signal processing, and further optimizing the real-time performance and accuracy of output frequency control.

[0101] S200: Calculate the positive characteristic value corresponding to the first voltage value, and calculate the reverse characteristic value corresponding to the second voltage value.

[0102] The first and second voltage values ​​are used to determine whether the real-time output frequency of the ultrasonic device 10 has changed. When the real-time output frequency does not change, the energy conversion device 200 converts the forward electrical signal into an ultrasonic signal with maximum conversion efficiency. At this time, the ratio of the first and second voltage values ​​remains unchanged. When the real-time output frequency changes, a difference appears between the real-time output frequency and the resonant frequency. That is, after the energy conversion device 200 converts the forward electrical signal into an ultrasonic signal, the second voltage value of the reverse electrical signal changes, causing a change in the ratio of the first and second voltage values, thereby reducing the conversion efficiency between the forward electrical signal and the ultrasonic signal.

[0103] To accurately measure this changing relationship, the ultrasonic device 10 can calculate the positive characteristic value of the first voltage value based on the positive coupling conversion coefficient and circuit parameters, and calculate the reverse characteristic value corresponding to the second voltage value based on the reverse coupling conversion coefficient and circuit parameters, so as to determine whether the real-time output frequency has changed based on the change in the ratio of the reverse characteristic value and the reverse characteristic value.

[0104] S300: Calculate the first function value of the objective relation function at the current time based on the positive eigenvalue and the negative eigenvalue at the current time.

[0105] In order to determine whether the real-time output frequency has drifted, the ultrasonic device 10 can calculate the first function value of the target relation function at the current time based on the positive and negative eigenvalues ​​calculated at each time. The target relation function is used to characterize the functional relationship between the ratio of the negative and positive eigenvalues.

[0106] In some embodiments, the ultrasound device 10 may be pre-set with a target relationship function for the ratio of reverse eigenvalues ​​to forward eigenvalues, which can be expressed as follows:

[0107] ;

[0108] in, Positive eigenvalues These are inverse eigenvalues. These are the forward coupling conversion coefficients. These are the reverse coupling conversion coefficients. The load impedance of the ultrasonic device 10 is... System characteristic impedance, The real-time output frequency is determined by this. Based on this, the ratio of the reverse eigenvalue to the forward eigenvalue and the real-time output frequency should satisfy a target relationship function, that is, the ultrasonic device 10 can determine whether the real-time output frequency has changed by the ratio of the reverse eigenvalue to the forward eigenvalue.

[0109] The first function value is used to characterize the real-time output frequency of the ultrasound device 10 at the current moment. The ultrasound device 10 can be preset with a sampling interval duration, and each moment is determined by the sampling interval duration. The moment when the ultrasound device 10 starts is the starting moment. After the starting moment, each sampling interval duration is a sampling moment. At each moment, the ultrasound device 10 can calculate the first function value of the target relation function corresponding to that moment based on the inverse and forward eigenvalues ​​corresponding to that moment.

[0110] S400: Calculate the value of the second function.

[0111] The second function value is the function value of the target relation function at the initial resonant frequency, used to characterize the initial resonant frequency of the ultrasonic device. The time corresponding to the initial resonant frequency is the starting time. At this time, the ultrasonic device 10 has not been running for a long time, and there is no real-time output frequency drift caused by device heating or long-term operation. Therefore, the initial resonant frequency can be used as a reference value to determine whether the real-time output frequency has changed.

[0112] When the ultrasonic device 10 is started, the second function value of the target relation function at the starting time can be calculated based on the reverse characteristic value and the forward characteristic value at the starting time.

[0113] In some embodiments, the ultrasonic device 10 may adjust the real-time output frequency through steps S500 and / or S600.

[0114] S500: Adjust the real-time output frequency of the ultrasonic device at the next moment based on the first function value and the second function value at the current moment.

[0115] During the operation of the ultrasound equipment, the ultrasound equipment 10 continuously samples the positive and negative feature values ​​according to a preset sampling interval and calculates the first function value of the target relation function at each time step. Then, the ultrasound equipment 10 compares the first function value at the current time step with the second function value. If the deviation of the first function value from the second function value exceeds a first preset threshold, the ultrasound equipment 10 dynamically updates the real-time output frequency of the ultrasound equipment 10 at the next time step based on the deviation, so that the real-time output frequency of the ultrasound equipment 10 at the next time step can be corrected in real time to follow the initial resonant frequency.

[0116] S600: Adjust the real-time output frequency of the ultrasonic device at the next moment based on the derivative of the ratio of the eigenvalue change and the second function value.

[0117] The eigenvalue change ratio is the ratio of the reverse eigenvalue at the current time to the reverse eigenvalue at the previous time, and the positive eigenvalue at the current time to the positive eigenvalue at the previous time.

[0118] For example, if the current time is t, then the previous time is t-1, and the ultrasound device 10 can calculate the positive eigenvalue at the current time t. The positive eigenvalues ​​of the previous time step t-1 Then, calculate the positive eigenvalues ​​at the current time t. Positive eigenvalues ​​of the previous time t-1 The difference is used to obtain the positive feature difference.

[0119] Correspondingly, the ultrasonic device 10 can calculate the inverse eigenvalue at the current time t. The reverse eigenvalue of the previous time t-1 Then, calculate the inverse eigenvalue at the current time t. The inverse eigenvalue of the previous time t-1 The difference is used to obtain the inverse feature difference.

[0120] Next, the ultrasound device 10 calculates the ratio of the reverse feature difference to the forward feature difference to obtain the feature value change ratio. After obtaining the feature value change ratio, the ultrasound device 10 can compare the feature value change ratio with the derivative result of the second function value. If the deviation of the feature value change ratio from the derivative result of the second function value exceeds a second preset threshold, the ultrasound device will dynamically update the real-time output frequency of the ultrasound device 10 at the next moment according to the deviation.

[0121] Based on the above technical solution, the ultrasonic device 10 samples the first voltage value of the forward electrical signal and the second voltage value of the reverse electrical signal, calculates the first function value of the target relationship function at the corresponding time based on the forward and reverse eigenvalues, compares the first function value with the second function value, and / or compares the difference in eigenvalue changes with the derivative of the second function value, so as to update the real-time output frequency of the ultrasonic device 10 at the next time. This allows the ultrasonic device 10 to accurately adjust the real-time output frequency of the host 100 by sampling only the first and second voltage values, thereby improving the frequency adjustment efficiency.

[0122] Figure 4 A flowchart of a first embodiment of adjusting the real-time output frequency of an ultrasonic device provided in some embodiments of this application.

[0123] See Figure 4 In some embodiments, the ultrasound device 10 can increase or decrease the real-time output frequency by comparing the first function value and the second function value corresponding to the target relation function at the current time. In order to determine the adjustment method of the real-time output frequency, step S500 may include S510-S530.

[0124] S510: Set the first deviation control factor and frequency adjustment amount.

[0125] The ultrasonic device 10 can be set with a first deviation control factor and a frequency adjustment amount. The first deviation control factor is used to measure the degree of deviation between a first function value and a second function value, so as to determine whether the real-time output frequency needs to be adjusted based on the degree of deviation. The frequency adjustment amount is a unit adjustment amount of the real-time output frequency, used to represent the fixed step size when adjusting the real-time output frequency each time, so as to ensure the stability of frequency changes.

[0126] Based on the first deviation control factor, it can be determined that the first resonant frequency should be within the safe resonant frequency range when no adjustment is required.

[0127] S520: If the first function value is greater than the sum of the second function value and the first deviation control factor, the real-time output frequency of the ultrasonic device at the next moment is adjusted to the difference between the current frequency and the frequency adjustment amount.

[0128] When the first function value is greater than the sum of the second function value and the first deviation control factor, that is... This indicates the frequency at the current time t. Compared to the resonant frequency drifting upwards and exceeding the upper limit of the safe resonant frequency range, the ultrasonic device 10 needs to adjust the real-time output frequency at the next moment t+1. The adjustment will be made downwards. = , is the ratio of the reverse eigenvalue at the initial resonant frequency to the forward eigenvalue at the initial resonant frequency, i.e., the second function value. This is the first deviation control factor.

[0129] The ultrasonic device 10 can output the frequency in real time at the next moment. The frequency is adjusted to the difference between the current frequency and the frequency adjustment amount, so that the real-time output frequency at the next moment is closer to the resonant frequency, thereby adjusting the real-time output frequency of the ultrasonic device 10 downward to a safe resonant frequency range. The real-time output frequency of the ultrasonic device 10 at the next moment is... ,in, This is the frequency adjustment amount. This prevents the energy value of the ultrasonic signal obtained by the ultrasonic device 10 from converting electrical signals from being too high due to excessively high real-time output frequency, thus improving the safety of the ultrasonic device 10.

[0130] S530: If the first function value is less than or equal to the difference between the second function value and the first deviation control factor, the real-time output frequency of the ultrasonic device at the next moment is adjusted to the sum of the current frequency and the frequency adjustment amount.

[0131] When the first function value is less than or equal to the difference between the second function value and the first deviation control factor, i.e. This indicates that at the current time t, the first resonant frequency has drifted downwards compared to the original resonant frequency and has exceeded or equaled the lower limit of the safe resonant frequency range. Therefore, the ultrasonic device 10 needs to adjust the real-time output frequency at the next time t+1. Adjustments will be made accordingly.

[0132] The ultrasonic device 10 can output the frequency in real time at the next moment. The frequency is adjusted to the sum of the current frequency and the frequency adjustment amount, so that the adjusted real-time output frequency at the next moment moves closer to the resonant frequency, thereby adjusting the real-time output frequency of the ultrasonic device 10 upward to a safe resonant frequency range. The real-time output frequency of the ultrasonic device 10 at the next moment is then determined. This improves the conversion efficiency of the ultrasonic equipment 10, ensuring that the energy value of the ultrasonic signal meets the required value.

[0133] Based on the above technical solution, by setting a first deviation control factor and a frequency adjustment amount, and updating the real-time output frequency of the next moment according to the comparison between the first function value and the second function value corresponding to each moment, the real-time output frequency is kept close to or the same as the resonant frequency, thereby improving the efficiency and safety of the ultrasonic equipment 10 in converting ultrasonic signals.

[0134] Figure 5A flowchart of a second embodiment of adjusting the real-time output frequency of an ultrasonic device is provided for some embodiments of this application.

[0135] See Figure 5 In some embodiments, the ultrasonic device 10 can also adjust the real-time output frequency by determining the ratio of the changes in characteristic values ​​corresponding to two adjacent time points. Therefore, step S600 may include:

[0136] S610: Set the second deviation control factor and frequency adjustment amount.

[0137] The ultrasound device 10 can be set with a second deviation control factor and a frequency adjustment amount. The second deviation control factor is used to measure the degree of deviation of the change value between two adjacent time points corresponding to two first function values ​​relative to a preset change value. The preset change value can be determined based on the change value of the ultrasound device 10 between the starting time and the next time point. The setting method of the frequency adjustment amount can be referred to step S510 in the aforementioned embodiment, and will not be repeated here.

[0138] S620: When the ratio of the change in eigenvalues ​​is greater than the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasonic device at the next moment is adjusted to the difference between the current frequency and the frequency adjustment amount.

[0139] The derivative of the objective relation function at the initial time, i.e. , can represent the initial slope of the ratio between the inverse eigenvalue and the forward eigenvalue as the real-time output frequency changes.

[0140] When the ratio of eigenvalue changes satisfies the following condition, the ultrasonic device 10 can adjust its real-time output frequency at the next moment to the difference between the current frequency and the frequency adjustment amount. See the following formula:

[0141] ;

[0142] in, It represents the ratio of the change in eigenvalues ​​between the current time t and the previous time t-1. This is the derivative of the second function value of the objective relational function at the initial resonant frequency. This is the second deviation control factor.

[0143] At this point, it indicates that the ratio of eigenvalue changes is greater than the sum of the derivative of the second function value and the second deviation control factor, and the slope corresponding to the ratio of eigenvalue changes in the target relational function is higher than the initial slope. Therefore, the ultrasonic device 10 needs to adjust the real-time output frequency at the next moment to the difference between the current frequency and the frequency adjustment amount, so that the slope of the ratio of eigenvalue changes in the target relational function moves to a relatively flat region, closer to the initial slope.

[0144] S630: When the ratio of the change in eigenvalues ​​is less than or equal to the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasonic device at the next moment is adjusted to the sum of the current frequency and the frequency adjustment amount.

[0145] When the ratio of eigenvalue changes satisfies the following condition, the ultrasonic device 10 can adjust the real-time output frequency at the next moment to the sum of the current frequency and the frequency adjustment amount. See the following formula:

[0146] ;

[0147] At this point, it indicates that the ratio of eigenvalue changes is less than the sum of the derivative of the target relation function at the initial time and the second deviation control factor, and the slope corresponding to the ratio of eigenvalue changes in the target relation function is lower than the initial slope. Therefore, the ultrasonic device 10 needs to adjust the real-time output frequency at the next time step to the sum of the current frequency and the frequency adjustment amount, so that the slope of the ratio of eigenvalue changes in the target relation function moves towards a relatively steep region, closer to the initial slope.

[0148] Based on the above technical solution, by calculating the ratio of the changes in the eigenvalues ​​of the positive and negative eigenvalues ​​at adjacent time points, and combining the derivative result of the second function value with the second deviation control factor, the dynamic change trend of the real-time output frequency can be quickly determined, so as to accurately adjust the real-time output frequency.

[0149] In some embodiments, after updating the real-time output frequency by executing steps S510-S530, the ultrasonic device 10 can also calculate the first function difference between the first function value and the second function value at each time. The first function difference is the offset of the first function value compared to the second function value. Therefore, the adjusted real-time output frequency can be further verified by the first function difference.

[0150] If the absolute value of the first function difference is less than or equal to the first deviation control factor, it indicates that the updated real-time output frequency has been adjusted to the safe resonant frequency range. At this time, the ultrasonic device 10 can maintain the real-time output frequency and no longer update it. If the absolute value of the first frequency difference is greater than the first deviation control factor, it indicates that the real-time output frequency changes again at the next moment after the update and produces a large difference from the resonant frequency. Therefore, the ultrasonic device 10 can continue to update the real-time output frequency according to steps S520-S530 until the absolute value of the first function difference is less than or equal to the first deviation control factor.

[0151] Based on the above technical solution, this embodiment calculates the first function difference after updating the real-time output frequency, and stops updating the real-time output frequency when the first function difference is less than or equal to the first deviation control factor, so as to reduce unnecessary output frequency updates and improve the stability of adjusting the real-time output frequency.

[0152] In some embodiments, after performing steps S610-S630, the ultrasonic device 10 can also calculate the second function difference between the ratio of eigenvalue changes between two adjacent time points and the derivative result of the second function value. The second function difference is the offset of the ratio of eigenvalue changes relative to the derivative result of the second function value. Therefore, the adjusted real-time output frequency can be further verified through the second function difference.

[0153] If the absolute value of the second function difference is less than or equal to the second deviation control factor, it indicates that the updated real-time output frequency has been adjusted to the safe resonant frequency range. At this time, the ultrasonic device 10 can maintain the real-time output frequency and no longer update it. If the absolute value of the second function difference is greater than the second deviation control factor, it indicates that the real-time output frequency changes again at the next time point after the update, causing a large difference between the ratio of the characteristic value change between two adjacent time points and the derivative of the second function value. Therefore, the ultrasonic device 10 can continue to update the real-time output frequency according to steps S620-S630 until the absolute value of the second function difference is less than or equal to the second deviation control factor.

[0154] Based on the above technical solution, by calculating the difference of the second function, and stopping the real-time output frequency update when the absolute value of the difference of the second function is less than the second deviation control factor, unnecessary output frequency updates are reduced and the stability of adjusting the real-time output frequency is improved.

[0155] Figure 6 A flowchart illustrating the calculation of forward and reverse eigenvalues ​​for an ultrasonic device provided in an embodiment of this application.

[0156] See Figure 6 In some embodiments, step S200 may include steps S210-S230.

[0157] S210: Obtain the impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic equipment.

[0158] To facilitate the calculation of positive and negative eigenvalues, the ultrasonic device 10 needs to acquire circuit parameters in advance. These parameters may include an impedance characteristic function, system characteristic impedance, and resistance values. The impedance characteristic function characterizes the relationship between the impedance of the ultrasonic device 10 and the real-time output frequency. Each time the real-time output frequency is adjusted, the impedance of the ultrasonic device 10 changes accordingly. Therefore, the ultrasonic device 10 needs to update the circuit impedance in a timely manner based on the impedance characteristic function to improve the accuracy of adjusting the real-time output frequency. The system characteristic impedance is a fixed impedance preset by the ultrasonic device 10 based on the resonant frequency, typically set to 50Ω. Since different ultrasonic devices 10 have different resonant frequencies, different system characteristic impedances can be set for different ultrasonic devices 10. The system characteristic impedance does not change with the real-time adjustment of the output frequency, thus providing a stable reference for the subsequent calculation of positive and negative eigenvalues. The resistance value is an inherent parameter of specific components in the ultrasonic device 10 circuit, such as the resistance of a current-limiting resistor or matching resistor, and can be obtained through direct measurement.

[0159] S220: Calculate the forward characteristic value based on the impedance characteristic function, system characteristic impedance, resistance value, first voltage value, and forward coupling conversion coefficient.

[0160] The ultrasonic device 10 can calculate the forward characteristic value using the following formula based on the impedance characteristic function, system characteristic impedance, resistance value, first voltage value, and forward coupling conversion coefficient:

[0161] ;

[0162] in, Positive eigenvalues The first voltage value, This is the resistance value. The characteristic impedance of the system. This is the impedance characteristic function. To output frequency in real time, The forward coupling conversion coefficient is obtained by multiplying the conversion function by the forward coupling coefficient. The forward coupling coefficient is the circuit coupling coefficient when the host 100 outputs a forward electrical signal, and is usually a constant. Therefore, the forward coupling conversion coefficient can be calculated using the following formula:

[0163] ;

[0164] in, The positive coupling coefficient is... This is the transfer function of the RMS conversion circuit.

[0165] S230: Calculate the reverse characteristic value based on the impedance characteristic function, the system characteristic impedance, the resistance value, the second voltage value, and the reverse coupling conversion coefficient.

[0166] The ultrasonic device 10 can calculate the reverse characteristic value using the following formula based on the impedance characteristic function, system characteristic impedance, resistance value, second voltage value, and reverse coupling conversion coefficient:

[0167] ;

[0168] in, These are inverse eigenvalues. This is the second voltage value. The reverse coupling conversion coefficient is obtained by multiplying the conversion function by the reverse coupling coefficient. The reverse coupling coefficient is the circuit coupling coefficient when the host 100 outputs a reverse electrical signal, and is usually a constant. Therefore, the reverse coupling conversion coefficient can be calculated using the following formula:

[0169] ;

[0170] in, This is the reverse coupling coefficient.

[0171] Based on the above technical solutions, this embodiment calculates the forward and reverse eigenvalues ​​by combining the impedance characteristic function, system characteristic impedance, and resistance value, and by introducing forward and reverse coupling conversion coefficients, respectively. Considering the impedance characteristics and circuit coupling of the ultrasonic device 10, the calculated forward and reverse eigenvalues ​​are made to better reflect the operating conditions of the ultrasonic device 10, thereby improving the accuracy of the calculated forward and reverse eigenvalues.

[0172] Figure 7 This is a flowchart illustrating the acquisition of impedance characteristic function, system characteristic impedance, and resistance value of an ultrasonic device according to some embodiments of this application.

[0173] See Figure 7 In some embodiments, step S210 may also include steps S211-S212.

[0174] S211: Obtain the inductive reactance and capacitive reactance of the ultrasonic device 10, and measure the system characteristic impedance and resistance of the ultrasonic device 10.

[0175] Inductive reactance, capacitive reactance, and resistance are all fundamental circuit parameters of the ultrasonic device 10, characterizing its circuit characteristics at specific frequencies. Inductive reactance is related to the inductor in the ultrasonic device 10 and varies with the real-time output frequency; the higher the real-time output frequency, the larger the inductive reactance, and vice versa. Capacitive reactance is related to the capacitor in the ultrasonic device 10; it decreases as the real-time output frequency increases, and increases as the real-time output frequency increases. Resistance characterizes the circuit losses of the ultrasonic device 10 and can be considered a relatively stable constant parameter. The system characteristic impedance is a fixed impedance value set by the ultrasonic device 10 based on its initial resonant frequency and can be directly obtained through measurement.

[0176] To facilitate the acquisition of inductive reactance, capacitive reactance, and the measurement of resistance of the ultrasonic device 10, the ultrasonic device 10 may be equipped with an impedance matching circuit. The impedance matching circuit may be connected in series or in parallel with the output sensing module 120. The impedance matching circuit can adjust the internal adjustable inductor and adjustable capacitor components to adapt to the changes in circuit parameters of the ultrasonic device 10 under different operating conditions in real time, thereby accurately measuring the inductive reactance, capacitive reactance, and resistance of the ultrasonic device 10.

[0177] The impedance matching circuit can also be connected in series or parallel with the equivalent circuit model of the energy conversion device 200. This equivalent circuit model can simulate the impedance changes of the energy conversion device 200 at different output frequencies. By connecting the impedance matching circuit in series or parallel with the equivalent circuit model, it is possible to simulate the impedance matching circuit being connected in series or parallel with the actual energy conversion device 200. Using the equivalent circuit model, circuit parameters can be measured without affecting the energy conversion device 200, such as measuring resistance, inductive reactance, and capacitive reactance, thus improving the safety of measuring circuit parameters of the energy conversion device 200.

[0178] In some embodiments, the impedance matching circuit pre-adjusts based on the circuit parameters of the ultrasonic device 10 at the initial moment. For example, an initial parameter is pre-assigned to the inductance and capacitance values ​​respectively, so that the circuit parameters of the ultrasonic device 10 are in a state of approximate matching. Then, the inductance and capacitance values ​​are finely adjusted based on the system characteristic impedance data to ensure the stability of the circuit during measurement. After determining the inductance and capacitance values, the inductive reactance and capacitive reactance of the ultrasonic device 10 in the current state can be measured using a series-parallel equivalent circuit model.

[0179] In some embodiments, the circuit of the ultrasonic device 10 may also have an automatic calibration function. The ultrasonic device 10 can periodically detect and correct the parameters of the internal components in the circuit of the ultrasonic device 10 through the automatic calibration function, so as to avoid measurement errors caused by component aging or environmental factors and improve the accuracy of inductive reactance, capacitive reactance and resistance measurement data.

[0180] S212: Calculate the impedance characteristic function based on the inductive reactance, capacitive reactance, and real-time output frequency.

[0181] After obtaining the inductive reactance and capacitive reactance values, the ultrasonic device 10 can calculate the impedance characteristic function using the following formula:

[0182] ;

[0183] in, This is the impedance characteristic function. The inductive reactance value is the value measured after the impedance matching circuit and the equivalent circuit model are connected in series or parallel, which represents the inductive reactance value obtained in step S211. The capacitive reactance value is the value measured after the impedance matching circuit and the equivalent circuit model are connected in series or in parallel, which represents the capacitive reactance value obtained in step S211.

[0184] Based on the above technical solution, by obtaining the inductive reactance and capacitive reactance values ​​and combining them with the real-time output frequency to calculate the impedance characteristic function, dynamic modeling of the impedance change of the ultrasonic device 10 is realized, so that the impedance characteristic function can accurately represent the relationship between the impedance of the ultrasonic device 10 and the real-time output frequency.

[0185] Figure 8 A flowchart illustrating the acquisition of transformation functions for ultrasonic devices provided in some embodiments of this application.

[0186] See Figure 8 In some embodiments, the ultrasonic device 10 may include steps S221-S222 before performing step S220.

[0187] S221: Obtain the bandwidth coefficient of the host's conversion circuit.

[0188] The bandwidth coefficient of a conversion circuit measures its ability to transmit electrical signals within a specific frequency range. A larger bandwidth coefficient indicates a wider effective frequency range for the conversion circuit, thus providing more comprehensive coverage of the output frequency variations of the ultrasonic device 10 under different operating conditions. The bandwidth coefficient can be obtained by analyzing the amplitude-frequency response curve of the conversion circuit.

[0189] S222: Calculate the conversion function based on the bandwidth coefficient and the real-time output frequency.

[0190] After obtaining the bandwidth coefficient, the ultrasonic device 10 can calculate the transformation function using the following formula:

[0191] ;

[0192] in, For conversion functions, This represents the bandwidth coefficient.

[0193] Based on the above technical solutions, this embodiment calculates the conversion function by using the bandwidth coefficient of the conversion circuit and the real-time output frequency, ensuring the applicability of the conversion function at different output frequencies, thereby improving the consistency and accuracy of voltage value sampling.

[0194] Some embodiments of this application also provide an ultrasonic device 10, which is used to perform the output frequency control method of the ultrasonic device provided in the above embodiments.

[0195] Figure 9 This is a block diagram of the content module structure of an ultrasonic device provided in some embodiments of this application. See also: Figure 9 The ultrasonic device 10 may include a main unit 100 and an energy conversion device 200. The main unit 100 includes a power module 110, an output sensing module 120, and an output control module 130, which are coupled to each other. The power module 110 may include a power amplifier circuit 111, which is configured to output a positive electrical signal to the energy conversion device 200. The energy conversion device 200 is configured to convert the positive electrical signal into an ultrasonic signal and output the ultrasonic signal to the outside of the ultrasonic device 10. During the conversion of the electrical signal into an ultrasonic signal, there may be unconverted electrical signals, which are reverse electrical signals. The energy conversion device 200 can output the reverse electrical signals to the main unit 100 to form a closed loop. For this purpose, the power module 110 is also configured to receive the electrical signal reflected back to the main unit 100 after the energy conversion device 200 has converted the positive electrical signal into an ultrasonic signal.

[0196] The output sensing module 120 is configured to sample the first voltage value of the positive electrical signal and the second voltage value of the negative electrical signal.

[0197] The output control module 130 is configured to calculate the positive characteristic value corresponding to the first voltage value and the reverse characteristic value corresponding to the second voltage value based on the first voltage value and the second voltage value sampled by the output sensing module 120 at each time moment, calculate the first function value of the target relationship function at the current time moment based on the positive characteristic value and the reverse characteristic value at the current time moment, and adjust the real-time output frequency of the ultrasonic device 10 at the next time moment based on the first function value and the second function value.

[0198] Among them, the target relation function is used to characterize the functional relationship between the ratio of the reverse eigenvalue and the forward eigenvalue, the first function value is used to characterize the real-time output frequency of the ultrasonic device 10 at the current moment, and the second function value is the function value of the target relation function at the initial resonant frequency.

[0199] In some embodiments, the output control module 130 can be one or more of the following: Advanced RISC Machines (ARM), Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), Application-Specific Integrated Circuit (ASIC), Central Processing Unit (CPU), and Graphics Processing Unit (GPU). The output control module 130 may internally house a main control chip for running a software operating system. The control logic and algorithms of the software operating system can run within the main control chip to execute the output frequency control method of the ultrasonic device 10. The output control module 130 may also include a storage chip, such as flash memory or electrically erasable programmable read-only memory, for storing software, software configuration data, and algorithm control data.

[0200] Based on the above technical solutions, this embodiment provides an internal module structure for the ultrasonic device 10, so that the ultrasonic device 10 can execute the corresponding process in the output frequency control method of the ultrasonic device 10 according to different modules. Its beneficial effects and implementation methods can be referred to the method embodiment, and will not be repeated here.

[0201] Figure 10 Internal circuit diagrams of ultrasonic devices provided for some embodiments of this application.

[0202] See Figure 10 The output sensing module 120 may include a coupling sensing circuit 121, a conversion circuit 122, and a sampling circuit 123 connected in series. The coupling sensing circuit 121 is configured to output the forward electrical signal output by the power amplifier circuit 111 and the reverse electrical signal returned by the energy conversion device 200 according to a preset circuit coupling coefficient. During the output of the forward and reverse electrical signals, the conversion circuit 122 can convert the forward and reverse electrical signals into forward DC signals and reverse DC signals respectively through a conversion function. Then, the sampling circuit 123 samples the forward DC signal to obtain a first voltage value and samples the reverse DC signal to obtain a second voltage value.

[0203] Based on the above technical solutions, this embodiment provides the internal circuit structure of the output sensing module 120 so as to perform processes such as electrical signal output, DC-AC conversion and sampling through the corresponding circuit. Its beneficial effects and implementation methods can be referred to the method embodiment, and will not be repeated here.

[0204] See also Figure 10 The host 100 may also include an impedance matching circuit 140, which is configured to acquire the impedance characteristic function, system characteristic impedance and resistance value of the ultrasonic device 10. The impedance characteristic function is used to characterize the relationship between the impedance of the ultrasonic device 10 and the real-time output frequency, and the system characteristic impedance is a fixed impedance preset based on the initial resonant frequency.

[0205] Impedance matching circuit 140 can also be connected to equivalent circuit model 150, which can simulate the operating state of energy consumption conversion device 200. Equivalent circuit model 150 includes a first inductor L1, a first capacitor C1, and a resistor R; impedance matching circuit 140 includes a second inductor L2 and a second capacitor C2. These circuit components are arranged as follows: Figure 10 The circuit connections shown are such that by adjusting the first inductor L1, the first capacitor C1, and the resistor R, the impedance matching circuit 140 can be connected in series with the simulated real energy conversion device 200. Through the equivalent circuit model 150, the circuit parameters can be measured without affecting the energy conversion device 200, thereby improving the safety of the energy conversion device 200 when measuring the circuit parameters.

[0206] Based on the above technical solutions, this embodiment provides a circuit parameter that obtains impedance characteristic function, system characteristic impedance and resistance value through impedance matching circuit 140. Its beneficial effects and implementation methods can be referred to the method embodiment, and will not be repeated here.

[0207] Figure 11 This is a structural diagram of the energy conversion device of an ultrasonic device provided in some embodiments of this application.

[0208] See Figure 11 The energy conversion device 200 may include a handle 210 and a treatment head 220, which are detachably connected. One end of the handle 210 is connected to the main unit 100 to receive a positive electrical signal sent by the main unit 100. The handle 210 includes a handle housing 212 and an internal circuit module 211 disposed inside the handle housing 212. The handle 210 can transmit the positive electrical signal to the treatment head through the internal circuit module 211. The handle housing 212 is designed according to the bionic design of the human hand to ensure that the operator can maintain a comfortable posture and reduce hand fatigue when holding the handle 210 for a long time.

[0209] The treatment head 220 is connected to the other end of the handle 210 and is used to output the converted ultrasound signal to the outside of the ultrasound device 10. The treatment head 220 includes a treatment head housing 222 and an ultrasound transducer 221 disposed inside the treatment head housing 222. The ultrasound transducer 221 is configured to convert a positive electrical signal into an ultrasound signal and transmit the ultrasound signal to the outside of the ultrasound device 10 through an end face window of the treatment head 220. The interior of the treatment head housing 222 can be filled with a sound-conducting medium, such as water or an organic solvent, to facilitate the transmission of ultrasound signals through the sound-conducting medium. The end face window can be coated with a coupling agent, which mainly contains water, glycerin, polyethylene glycol, etc., to improve the efficiency of transmitting ultrasound signals to the lesion area.

[0210] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

Claims

1. A method for controlling the output frequency of an ultrasonic device, applied to the ultrasonic device, the ultrasonic device comprising a main unit and an energy conversion device, characterized in that, include: The conversion circuit of the ultrasound device converts the positive electrical signal and the negative electrical signal into a positive DC signal and a negative DC signal, respectively. The positive electrical signal is the electrical signal output by the host to the energy conversion device according to the real-time output frequency, and the negative electrical signal is the electrical signal reflected back to the host after the energy conversion device converts the positive electrical signal into an ultrasound signal. The forward DC signal is sampled to obtain a first voltage value, and the reverse DC signal is sampled to obtain a second voltage value; Calculate the positive eigenvalue corresponding to the first voltage value, and calculate the reverse eigenvalue corresponding to the second voltage value; Based on the positive eigenvalue and the negative eigenvalue at the current moment, the first function value of the target relation function at the current moment is calculated. The target relation function is used to characterize the functional relationship between the ratio of the negative eigenvalue and the positive eigenvalue. The first function value is used to characterize the real-time output frequency of the ultrasound device at the current moment. Calculate the second function value, which is the function value of the target relational function at the initial resonant frequency; The real-time output frequency of the ultrasonic device is adjusted at the next moment based on the first function value and the second function value at the current moment; And / or, The real-time output frequency of the ultrasound device at the next moment is adjusted based on the derivative of the eigenvalue change ratio and the second function value; wherein, the eigenvalue change ratio is the ratio of the reverse eigenvalue at the current moment to the reverse eigenvalue at the previous moment and the positive eigenvalue at the current moment to the positive eigenvalue at the previous moment.

2. The output frequency control method for ultrasonic equipment according to claim 1, characterized in that, The step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the first function value and the second function value at the current moment includes: Set a first deviation control factor and a frequency adjustment amount, wherein the frequency adjustment amount is a unit adjustment amount of the real-time output frequency; If the first function value is greater than the sum of the second function value and the first deviation control factor, the real-time output frequency of the ultrasound device at the next moment is adjusted to the difference between the current frequency and the frequency adjustment amount. If the first function value is less than or equal to the difference between the second function value and the first deviation control factor, the real-time output frequency of the ultrasound device at the next moment is adjusted to the sum of the current moment frequency and the frequency adjustment amount.

3. The method for controlling the output frequency of an ultrasonic device according to claim 1, characterized in that, The step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the derivative result of the ratio of the characteristic value change and the second function value includes: A second deviation control factor and a frequency adjustment amount are set, wherein the frequency adjustment amount is the unit adjustment amount of the real-time output frequency; If the ratio of the change in the characteristic value is greater than the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasound device at the next moment is adjusted to the difference between the current frequency and the frequency adjustment amount. If the ratio of the change in the characteristic value is less than or equal to the sum of the derivative of the second function value and the second deviation control factor, the real-time output frequency of the ultrasound device at the next moment is adjusted to the sum of the frequency at the current moment and the frequency adjustment amount.

4. The output frequency control method for ultrasonic equipment according to claim 2, characterized in that, After the step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the first function value and the second function value at the current moment, the method further includes: Calculate the adjusted first function value based on the adjusted real-time output frequency; Calculate the first function difference between the adjusted first function value and the second function value; If the absolute value of the difference in the first function is less than or equal to the first deviation control factor, the adjustment of the real-time output frequency of the ultrasound device shall be stopped.

5. The output frequency control method for ultrasonic equipment according to claim 3, characterized in that, After the step of adjusting the real-time output frequency of the ultrasonic device at the next moment based on the derivative result of the ratio of the characteristic value change and the second function value, the method further includes: Calculate the second function difference between the ratio of the eigenvalue changes between every two adjacent time points and the derivative of the second function value; If the absolute value of the difference in the second function is less than or equal to the second deviation control factor, the adjustment of the real-time output frequency of the ultrasound device shall be stopped.

6. The method for controlling the output frequency of an ultrasonic device according to claim 1, characterized in that, The steps of calculating the positive eigenvalue corresponding to the first voltage value and calculating the reverse eigenvalue corresponding to the second voltage value include: The impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic device are obtained. The impedance characteristic function is used to characterize the relationship between the impedance of the ultrasonic device and the real-time output frequency. The system characteristic impedance is a fixed impedance preset based on the initial resonant frequency. Based on the impedance characteristic function, the system characteristic impedance, the resistance value, the forward coupling conversion coefficient, and the first voltage value, the forward characteristic value is calculated, wherein the forward coupling conversion coefficient is the product of the conversion function and the forward coupling coefficient, and the forward coupling coefficient is the circuit coupling coefficient when the host outputs a forward electrical signal; as well as, Based on the impedance characteristic function, the system characteristic impedance, the resistance value, the reverse coupling conversion coefficient, and the second voltage value, the reverse characteristic value is calculated, wherein the reverse coupling conversion coefficient is the product of the conversion function and the reverse coupling coefficient, and the reverse coupling coefficient is the circuit coupling coefficient when the host receives the reverse electrical signal.

7. The output frequency control method for ultrasonic equipment according to claim 6, characterized in that, The steps of obtaining the impedance characteristic function, system characteristic impedance, and resistance value of the ultrasonic device include: The inductive reactance and capacitive reactance of the ultrasonic device are obtained, and the system characteristic impedance and resistance of the ultrasonic device are measured. The impedance characteristic function is calculated based on the inductive reactance, the capacitive reactance, and the real-time output frequency.

8. The output frequency control method for an ultrasonic device according to claim 6, characterized in that, Before the step of calculating the positive characteristic value of the first voltage value based on the impedance characteristic function, the system characteristic impedance, the resistance value, and the forward coupling conversion coefficient, the following steps are included: Obtain the bandwidth coefficient of the conversion circuit of the host; The conversion function is calculated based on the bandwidth coefficient and the real-time output frequency.

9. An ultrasonic device, characterized in that, Includes the main unit and energy conversion device; The host includes a power module, an output sensing module, and an output control module that are coupled together; wherein, the output sensing module includes a conversion circuit and a sampling circuit; The power module is configured to output a positive electrical signal to the energy conversion device, and to receive a negative electrical signal reflected back to the host after the energy conversion device converts the positive electrical signal into an ultrasonic signal; wherein the positive electrical signal is an electrical signal output by the host to the energy conversion device according to the real-time output frequency, and the negative electrical signal is an electrical signal reflected back to the host after the energy conversion device converts the positive electrical signal into an ultrasonic signal. The output sensing module is configured to convert the forward electrical signal and the reverse electrical signal into a forward DC signal and a reverse DC signal respectively through the conversion circuit, and to sample the forward DC signal to obtain a first voltage value through the sampling circuit, and to sample the reverse DC signal to obtain a second voltage value. The output control module is configured to calculate the positive characteristic value corresponding to the first voltage value, and to calculate the reverse characteristic value corresponding to the second voltage value. Based on the positive eigenvalue and the negative eigenvalue at the current moment, the first function value of the target relation function at the current moment is calculated. The target relation function is used to characterize the functional relationship between the ratio of the negative eigenvalue and the positive eigenvalue. The first function value is used to characterize the real-time output frequency of the ultrasound device at the current moment. Calculate the second function value, which is the function value of the target relational function at the initial resonant frequency; The real-time output frequency of the ultrasonic device is adjusted at the next moment based on the first function value and the second function value at the current moment; And / or, The real-time output frequency of the ultrasonic device at the next moment is adjusted according to the derivative of the eigenvalue change ratio and the second function value; wherein, the eigenvalue change ratio is the ratio of the reverse eigenvalue at the current moment to the reverse eigenvalue at the previous moment and the positive eigenvalue at the current moment to the positive eigenvalue at the previous moment. The energy conversion device is configured to convert the positive electrical signal into the ultrasonic signal and output the ultrasonic signal to the outside of the ultrasonic device.

10. The ultrasonic device according to claim 9, characterized in that, The output sensing module includes a series-connected coupling sensing circuit. The coupling sensing circuit is configured to output the positive electrical signal and the negative electrical signal according to a preset circuit coupling coefficient.

11. The ultrasonic device according to claim 10, characterized in that, The host also includes an impedance matching circuit, which is configured to acquire the impedance characteristic function, system characteristic impedance and resistance value of the ultrasound device. The impedance characteristic function is used to characterize the relationship between the impedance of the ultrasound device and the real-time output frequency. The system characteristic impedance is a fixed impedance preset based on the initial resonant frequency.

12. The ultrasonic device according to claim 9, characterized in that, The energy conversion device includes a handle and a treatment head, which are detachably connected. An ultrasonic transducer is provided inside the treatment head. The ultrasonic transducer is configured to convert the positive electrical signal into the ultrasonic signal and output the ultrasonic signal to the outside of the ultrasonic device.

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