Frequency adaptation circuit, device and ultrasonic weight loss instrument

Abstract

The application discloses a frequency adaptation circuit, a device and an ultrasonic weight loss instrument. The ultrasonic vibrator adaptation circuit comprises a vibrator access unit, a driving unit and an adaptation unit. The access end of the vibrator access unit is used for accessing the ultrasonic vibrator unit. The input end of the driving unit is used for accessing the power supply voltage. The output end of the driving unit is connected with the driving end of the vibrator access unit, used for generating a driving signal and driving the ultrasonic vibrator unit to vibrate based on the driving signal. The first end of the adaptation unit is connected with the detection end of the vibrator access unit. The second end of the adaptation unit is connected with the frequency modulation end of the driving unit, used for collecting the vibration frequency of the ultrasonic vibrator unit and adapting the driving signal based on the vibration frequency, so that the driving frequency of the driving signal and the vibration frequency of the ultrasonic vibrator unit are resonant. Through the circuit, the resonance of the driving frequency and the vibration frequency can be realized, the efficiency of the ultrasonic vibrator is improved, and the safety hidden danger caused by the frequency error is avoided.

Description

Technical Field

[0001] This application relates to the field of ultrasonic technology, and in particular to a frequency adaptation circuit, device, and ultrasonic slimming device. Background Technology

[0002] During use, due to differences in skin type and condition among users, and the potential wear and tear on the transducer unit, existing ultrasonic slimming devices exhibit discrepancies between the vibration frequency of the transducer unit and the frequency of its drive signal. Furthermore, because the frequency of the drive signal and the frequency of the ultrasonic transducer are difficult to match in current methods, this error is difficult to automatically eliminate. The accumulation of this error directly affects the transmission efficiency of ultrasonic energy, increasing power loss and gradually raising the temperature of the transducer unit. This not only reduces the lifespan of the device but may also cause burns to the user's skin and even pose safety hazards such as fires. Summary of the Invention

[0003] This application mainly provides a frequency matching circuit, device, and ultrasonic slimming device, aiming to solve the technical problem that it is difficult to match the driving frequency of the driving signal and the vibration frequency of the ultrasonic transducer.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is: to provide a frequency adaptation circuit applied to an ultrasonic transducer unit. The frequency adaptation circuit includes: a transducer access unit, the access terminal of which is used to connect to the ultrasonic transducer unit; a driving unit, the input terminal of which is used to connect to a power supply voltage, and the output terminal of which is connected to the driving terminal of the transducer access unit, for generating a driving signal and driving the ultrasonic transducer unit to vibrate based on the driving signal; and an adaptation unit, the first terminal of which is connected to the detection terminal of the transducer access unit, and the second terminal of which is connected to the frequency modulation terminal of the driving unit, for acquiring the vibration frequency of the ultrasonic transducer unit, and adapting the driving frequency of the driving signal based on the vibration frequency to generate an adaptation frequency for adjusting the driving frequency, so that the driving frequency of the driving signal resonates with the vibration frequency of the ultrasonic transducer unit.

[0005] In some embodiments, the adapter unit includes: a signal acquisition subcircuit, the first terminal of which is connected to the detection terminal of the vibrator access unit, for acquiring the vibration frequency; a signal frequency division subcircuit, the first terminal of which is connected to the second terminal of the signal acquisition subcircuit, for dividing the vibration frequency to obtain a divided frequency; and a signal comparison subcircuit, the first input terminal of which is connected to the second terminal of the signal frequency division subcircuit, and the second input terminal of which is connected to the reference terminal of the driving unit, for comparing the divided frequency with the reference signal frequency of the reference terminal to output a ratio. The comparison frequency is calculated based on the adaptation frequency and the reference signal frequency at the previous moment. When the division frequency is different from the reference signal frequency, the comparison frequency is the division frequency. A signal frequency multiplier sub-circuit is used, with its first terminal connected to the output terminal of the signal comparison sub-circuit and its second terminal connected to the frequency modulation terminal of the drive unit. This sub-circuit is used to multiply the comparison frequency to obtain the adaptation frequency, and then output the adaptation frequency to the frequency modulation terminal of the drive unit, so that the driving frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit.

[0006] In some embodiments, the signal comparison sub-circuit further includes: a pre-comparison module, wherein the first input terminal of the pre-comparison module is connected to the first terminal of the frequency division sub-circuit, the second input terminal of the pre-comparison module is connected to the second terminal of the frequency division sub-circuit, and the output terminal of the pre-comparison module is connected to the first input terminal of the signal comparison sub-circuit, for updating the frequency division frequency.

[0007] In some embodiments, the driving unit includes: a power supply sub-circuit for receiving the power supply voltage; a frequency modulation sub-circuit, the frequency modulation terminal of which is connected to the second terminal of the adapter unit, the reference terminal of which is used to store and output a reference signal frequency, and to generate a frequency modulation signal of an intermediate frequency based on the adapter frequency of the adapter unit and the reference signal frequency of a multiple of the adapter unit, and to use the intermediate frequency of half the frequency as the new reference signal frequency; and a driving sub-circuit, the power supply terminal of which is connected to the output terminal of the power supply sub-circuit, the control terminal of which is connected to the output terminal of the frequency modulation sub-circuit, and to generate a driving signal with the same driving frequency as the intermediate frequency based on the power supply voltage and the frequency modulation signal, and to drive the ultrasonic transducer unit to vibrate based on the driving signal.

[0008] In some embodiments, the frequency modulation sub-circuit includes a frequency tracking chip, which is used to perform average processing or weighted average processing on the reference signal frequency of the adaptation frequency and the multiplier to generate the frequency modulation signal of the intermediate frequency, and to use the intermediate frequency of the half-frequency as the new reference signal frequency.

[0009] In some embodiments, the driving unit further includes at least one of a voltage switching subcircuit and a boost subcircuit; the voltage switching subcircuit is connected between the power supply subcircuit and the driving subcircuit, the control terminal of the voltage switching subcircuit is used to receive a voltage switching command, the voltage switching subcircuit is used to acquire multiple preset voltages, and in response to the received voltage switching command, selects one of the preset voltages for output, so as to replace the power supply voltage input to the driving subcircuit with the selected preset voltage; the boost subcircuit is connected between the driving subcircuit and the vibrator access unit, and is used to boost the voltage of the driving signal, and drive the ultrasonic vibrator unit to vibrate based on the boosted driving signal.

[0010] In some embodiments, the transducer access unit includes: a plurality of transducer access sockets, each transducer access socket being used to access one ultrasonic transducer unit; a signal switching sub-circuit, the movable end of the signal switching sub-circuit being selectively connected to each transducer access socket, the fixed end of the signal switching sub-circuit being connected to the output end of the drive unit, the control end of the signal switching sub-circuit being used to receive control commands, and the movable end of the signal switching sub-circuit being used to select one transducer access socket to connect to based on the control commands, so as to drive the corresponding ultrasonic transducer unit to vibrate.

[0011] In some embodiments, the oscillator access unit further includes a frequency matching sub-circuit, which is connected between the output terminal of the driving unit and the driving terminal of the oscillator access unit, for smoothing the waveform of the driving frequency.

[0012] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a frequency adaptation device, which includes the frequency adaptation circuit described above.

[0013] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide an ultrasonic slimming device, which includes: an ultrasonic transducer unit for contacting human skin to break down fat in the skin layer; and a circuit board including the frequency adaptation circuit as described above, wherein the circuit board is electrically connected to the ultrasonic transducer unit for driving the ultrasonic transducer unit to vibrate.

[0014] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses a frequency adaptation circuit, device, and ultrasonic slimming device. The frequency adaptation circuit of this application acquires the vibration frequency of the ultrasonic transducer unit in real time through an adaptation unit, and adapts the drive signal based on this vibration frequency, so that the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit. This frequency adaptation circuit does not require manual or programmatic control or adjustment of the drive frequency, and can automatically achieve frequency resonance adaptation. This effectively improves the working efficiency and energy utilization of the ultrasonic transducer unit, reduces mechanical energy loss caused by frequency phase difference, reduces the risk of burns from heat generation and wear on the ultrasonic transducer unit, and facilitates the vibration of the ultrasonic transducer unit with higher power output, higher energy efficiency, lower noise, less wear, and greater comfort and safety, thereby ensuring the effectiveness and reliability of the corresponding ultrasonic slimming device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the frequency adaptation circuit provided in this application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the adapter unit 400 in one embodiment;

[0018] Figure 3 This is a schematic diagram of the circuit structure of an embodiment of the frequency adaptation circuit provided in this application;

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure of the driving unit 300 in one embodiment;

[0020] Figure 5 yes Figure 1 A schematic diagram of the structure of the driving unit 300 in another embodiment;

[0021] Figure 6 yes Figure 1 A schematic diagram of the structure of the oscillator access unit 200 in one embodiment;

[0022] Figure 7 This is a schematic diagram of the structure of an embodiment of the frequency adaptation device provided in this application;

[0023] Figure 8 This is a schematic diagram of an embodiment of the ultrasonic slimming device provided in this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] This application provides a frequency adaptation circuit for use in an ultrasonic transducer unit. (See reference...) Figure 1 , Figure 1 This is a schematic diagram of an embodiment of the frequency adaptation circuit 100 provided in this application.

[0028] The frequency adaptation circuit 100 includes a vibrator access unit 200, a driving unit 300, and an adaptation unit 400. The access terminal of the vibrator access unit 200 is used to connect to an ultrasonic vibrator unit. The input terminal of the driving unit 300 is used to connect to a power supply voltage, and the output terminal of the driving unit 300 is connected to the driving terminal of the vibrator access unit 200 to generate a driving signal and drive the ultrasonic vibrator unit to vibrate based on the driving signal. The first terminal of the adaptation unit 400 is connected to the detection terminal of the vibrator access unit 200, and the second terminal of the adaptation unit 400 is connected to the frequency modulation terminal of the driving unit 300. It is used to collect the vibration frequency of the ultrasonic vibrator unit and adapt the driving frequency of the driving signal based on the vibration frequency to generate an adaptation frequency for adjusting the driving frequency so that the driving frequency of the driving signal resonates with the vibration frequency of the ultrasonic vibrator unit.

[0029] An ultrasonic transducer unit is an integrated device that combines an ultrasonic transducer and an ultrasonic amplitude transformer. It can convert electrical energy into mechanical energy through the piezoelectric effect of piezoelectric ceramics based on an applied electric field, thereby generating vibrations at a fixed frequency.

[0030] However, although the vibration frequency of the ultrasonic transducer unit is fixed, an error between this vibration frequency and its driving frequency creates a frequency phase difference. This causes the transducer's vibration state to deviate from its optimal resonance state, resulting in changes in the transducer's amplitude, vibration direction, or vibration mode. Consequently, this leads to mechanical energy loss, affecting the output power and efficiency of the ultrasound, causing increased heat generation and noise, and potentially damaging the ultrasonic transducer unit. In existing methods, the frequency of the driving signal and the frequency of the ultrasonic transducer are difficult to match, making it difficult to automatically reduce this error. The accumulation of this error directly affects the transmission efficiency of ultrasonic energy, increasing power loss and gradually raising the temperature of the transducer unit. This not only reduces the lifespan of the equipment but may also cause burns to the user's skin and even pose safety hazards such as fires.

[0031] Therefore, it is urgent to control the driving frequency so that it reaches or approaches resonance with the vibration frequency of the ultrasonic transducer unit, in order to achieve greater power output, higher energy efficiency, lower noise, less wear, and more comfortable and safer vibration of the ultrasonic transducer unit, thus ensuring the effectiveness and reliability of the corresponding ultrasonic slimming device.

[0032] In the frequency adaptation circuit 100 of this embodiment, the transducer access unit 200 is used to connect the ultrasonic transducer unit to the circuit system, so that the ultrasonic transducer unit receives the driving signal generated by the frequency adaptation circuit 100, realizing the conversion of electrical energy into mechanical energy, thereby vibrating at a fixed frequency. The driving unit 300 is a functional unit that generates the corresponding driving signal. Unlike the prior art, the driving unit 300 in this embodiment, in addition to the driving signal generated based on the processing of the power supply voltage, can also receive the adjustment and control of the signal frequency by the adaptation unit 400, so that the driving frequency of the driving signal can be adapted to the vibration frequency of the ultrasonic transducer unit.

[0033] The adapter unit 400 is responsible for acquiring the vibration frequency of the ultrasonic transducer unit in real time and comparing it with the driving frequency generated by the drive unit 300. When a frequency error is found, the adapter unit 400 activates the corresponding adaptation mechanism to generate an adaptation frequency and outputs the adaptation frequency to the drive unit 300 to fine-tune the driving frequency until the driving frequency of the driving signal and the vibration frequency of the ultrasonic transducer unit reach or approach a resonant state. This process is dynamic, meaning that no matter how the vibration frequency of the ultrasonic transducer unit changes, the frequency adaptation circuit 100 can respond quickly to ensure that the frequency of the driving signal always resonates with the vibration frequency of the ultrasonic transducer unit.

[0034] This embodiment achieves real-time frequency tracking and adaptation of the ultrasonic transducer unit's vibration frequency through the coordinated operation of the transducer access unit 200, the drive unit 300, and the adaptation unit 400 in the frequency adaptation circuit 100. This ensures that the ultrasonic transducer unit can vibrate at a better frequency, thereby improving the working efficiency and stability of the ultrasonic transducer unit and avoiding problems such as mechanical energy loss, power reduction, and heat and wear caused by frequency and phase mismatch. This improves the effectiveness and reliability of the corresponding ultrasonic slimming device.

[0035] Optionally, see Figure 2 , Figure 2 yes Figure 1 The adapter unit 400 in the embodiment is shown in a structural schematic diagram of an embodiment.

[0036] The adapter unit 400 includes a signal acquisition subcircuit 410, a signal frequency division subcircuit 420, a signal comparison subcircuit 430, and a signal frequency multiplication subcircuit 440. The first terminal of the signal acquisition subcircuit 410 is connected to the detection terminal of the vibrator access unit 200 for acquiring the vibration frequency. The first terminal of the signal frequency division subcircuit 420 is connected to the second terminal of the signal acquisition subcircuit 410 for dividing the vibration frequency to obtain the divided frequency. The first input terminal of the signal comparison subcircuit 430 is connected to the second terminal of the signal frequency division subcircuit 420, and the second input terminal of the signal comparison subcircuit 430 is connected to the reference terminal of the drive unit 300 for comparing the frequencies. The frequency division frequency and the reference signal frequency of the reference terminal are used to output a comparison frequency. The reference signal frequency is calculated based on the adaptation frequency and the reference signal frequency of the previous moment. When the frequency division frequency is different from the reference signal frequency, the comparison frequency is the frequency division frequency. The first terminal of the signal frequency multiplier sub-circuit 440 is connected to the output terminal of the signal comparison sub-circuit 430, and the second terminal of the signal frequency multiplier sub-circuit 440 is connected to the frequency modulation terminal of the drive unit 300. It is used to multiply the comparison frequency to obtain the adaptation frequency, and output the adaptation frequency to the frequency modulation terminal of the drive unit 300 so that the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit.

[0037] The signal acquisition sub-circuit 410, through its first terminal connected to the detection terminal of the transducer signal acquisition unit, can capture the vibration signal of the ultrasonic transducer unit in real time and convert it into a processable electrical signal, which is then transmitted to subsequent circuits for processing. This signal acquisition sub-circuit 410 can acquire the vibration frequency of the ultrasonic transducer unit accurately and in real time. This acquisition process requires high sensitivity and accuracy to ensure the accuracy of subsequent processing. There are various ways to implement this signal acquisition sub-circuit 410; for example, it can be measured directly using a specific frequency meter and oscilloscope, indirectly using specific acoustic or optical instruments, or by configuring specific circuits or measuring equipment for frequency acquisition.

[0038] This application provides a circuit structure of an optional embodiment to realize the function of the signal acquisition sub-circuit 410, see reference. Figure 3 The circuit structure of the signal acquisition sub-circuit 410 is described. This signal acquisition sub-circuit 410 is mainly implemented using a transformer structure. One side of the transformer is connected to the detection terminal of the vibrator input unit 200 to receive the vibration signal from the ultrasonic vibrator unit, while the other side outputs an electrical signal corresponding to the vibration signal. Through the mutual inductance principle of the transformer, the vibration signal from the ultrasonic vibrator unit connected to the vibrator input unit 200 is converted into an electrical signal. Figure 3In the signal acquisition sub-circuit 410, the transformer in the signal acquisition sub-circuit 410 will be used as the high voltage side on one side of the oscillator access unit 200 and as the low voltage side on one side of the signal acquisition sub-circuit 410. This can ensure that the frequency of the acquired signal remains unchanged and also reduce the corresponding voltage to prevent damage to the subsequent circuits.

[0039] The signal frequency divider sub-circuit 420 is used to divide the vibration frequency acquired by the signal acquisition sub-circuit 410, converting the high-frequency signal into a low-frequency signal for subsequent signal comparison and processing. This signal frequency divider sub-circuit 420 divides the input signal according to a preset division ratio, generating a divided frequency and transmitting it to the subsequent signal comparison sub-circuit 430. The signal frequency divider sub-circuit 420 can be implemented in various ways. For example, it can be implemented using an LC filter network that utilizes the pass-through and stop-through characteristics of capacitors and inductors, or it can be implemented using resistor attenuation, or it can be implemented using a pulse frequency divider or other dedicated frequency divider devices and circuits.

[0040] This application provides a circuit structure of an optional embodiment to implement the function of the signal frequency divider sub-circuit 420, see reference. Figure 3 The circuit structure of the signal frequency divider sub-circuit 420 is described below. This frequency divider circuit mainly uses two diodes and a capacitor. The two diodes are connected in anti-parallel, with one side of the anti-parallel connection used for output and the other side connected to the capacitor and grounded. Through this circuit structure, the vibration frequency is rectified by the anti-parallel diodes and the capacitor's storage and discharge function to obtain the corresponding frequency divided by two, thus realizing the corresponding frequency division function. This frequency divider circuit structure is simple, low-cost, and easy to implement. Frequency division can avoid the problem of difficult calculation and processing caused by excessively high frequencies. The signal frequency divider sub-circuit 420 can also be optionally connected in series to realize more levels of frequency division, and can further divide the frequency of the subsequent corresponding reference signal, enabling efficient, accurate, and safe calculation and processing at low frequencies.

[0041] The signal comparison sub-circuit 430 is the core part of the adapter unit 400. It is responsible for comparing the frequency division output by the signal frequency division sub-circuit 420 with the reference signal frequency provided by the drive unit 300. In this comparison process, by inputting two frequency signals into the signal comparison sub-circuit 430, when the frequency division is inconsistent with the reference signal frequency, the signal comparison sub-circuit 430 will output the comparison frequency of the frequency division. When the frequency division is consistent with the reference signal frequency, it means that the drive frequency of the drive signal and the vibration frequency of the ultrasonic transducer unit have reached resonance. No additional output is required, and no additional processing or adjustment of the drive signal frequency is needed.

[0042] The signal comparison sub-circuit 430 obtains the reference signal frequency from the reference terminal of the drive unit 300. The reference signal frequency is calculated based on the adaptation frequency and the reference signal frequency of the previous moment, which is an adjustment frequency used to adjust the output of the drive signal. The reference signal frequency corresponds to the adjustment frequency, which is used to characterize the half frequency of the drive signal frequency. By comparing the half frequency with the newly acquired and divided frequency, when there is a difference between the current drive frequency and the vibration frequency of the ultrasonic transducer unit, the corresponding comparison frequency is output to the subsequent signal frequency multiplication sub-circuit 440 to generate the corresponding adaptation frequency.

[0043] This application provides a circuit structure of an optional embodiment to implement the function of the signal comparison sub-circuit 430, see reference. Figure 3 The structure of the signal comparison sub-circuit 430 is described. The signal comparison sub-circuit 430 includes two comparison modules. The comparison module U1A is used to implement the overall function of the signal comparison sub-circuit 430, that is, to compare the divided frequency and the reference signal frequency, and to not output when they are equal, and to output the comparison frequency when they are not equal. Therefore, the comparison module can be used alone as the structure of the signal comparison sub-circuit 430.

[0044] Specifically, in the signal comparison sub-circuit 430, which implements the corresponding function based on the comparison module U1A, a pre-comparison module U1B is also included, which is connected between the signal frequency division sub-circuit 420 and the comparison module U1A. The first input terminal of the pre-comparison module U1B is connected to the first terminal of the frequency division sub-circuit, the second input terminal of the pre-comparison module U1B is connected to the second terminal of the frequency division sub-circuit, and the output terminal of the pre-comparison module U1B is connected to the first input terminal of the signal comparison sub-circuit 430. The pre-comparison module U1B uses the first and second terminals of the signal frequency division sub-circuit 420 as two input terminals, respectively, which can further verify whether the frequency division obtained by the signal frequency division sub-circuit 420 is effective. When the frequency division is determined to be effective, the frequency division of the second terminal can continue to be used as the output. In the case of a two-way frequency division, the difference between the frequencies of the first and second terminals can also be calculated and output to the subsequent comparison module U1A.

[0045] The aforementioned frequency division and reference signal frequency are both calculated and processed using frequencies lower than the original frequencies to avoid the difficulty of calculating and processing extremely high-frequency signals. After the corresponding calculations and processing are completed, the appropriate adaptation frequency is output to the drive unit 300 through frequency multiplication. Through subsequent frequency modulation processing by the drive unit 300, the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit.

[0046] This application provides a circuit structure of an optional embodiment to implement the function of the signal frequency multiplier sub-circuit 440, see reference. Figure 3The structure of the signal comparison sub-circuit 430 is described. This signal frequency multiplier sub-circuit 440 includes two capacitors, two resistors, and two diodes. Due to the characteristic that capacitors pass AC and block DC, they only conduct when there is a difference between the inputs of the signal comparison sub-circuit 430. This further ensures that the signal comparison sub-circuit 430 does not output when the divided frequency matches the reference signal frequency, and does not output when the divided frequency does not match the reference signal frequency. The two diodes, for example... Figure 3 The structure enables the addition and multiplication of comparison frequencies to generate the corresponding adaptation frequency.

[0047] The adapter unit 400 described above integrates multiple key components such as acquisition, frequency division, comparison, and frequency doubling to achieve efficient adaptation between the ultrasonic transducer unit and the drive signal. This ensures accurate signal frequency acquisition, effectively prevents damage to subsequent circuits by reducing voltage, and flexibly converts high-frequency signals to low-frequency signals, reducing processing difficulty and improving system adaptability. The adapter unit 400 also achieves real-time monitoring of the resonance state of the drive signal and the ultrasonic transducer unit's vibration frequency by accurately comparing the divided frequency with the reference signal frequency, ensuring precise adjustment of the drive signal frequency.

[0048] Optionally, see Figure 4 , Figure 4 yes Figure 1 A schematic diagram of the structure of the driving unit 300 in the embodiment.

[0049] The drive unit 300 includes a power supply sub-circuit 310, a frequency modulation sub-circuit 320, and a drive sub-circuit 330. The power supply sub-circuit 310 is used to connect to the power supply voltage. The frequency modulation terminal of the frequency modulation sub-circuit 320 is connected to the second terminal of the adapter unit 400. The reference terminal of the frequency modulation sub-circuit 320 is used to store and output the reference signal frequency, and to generate a frequency modulation signal with an intermediate frequency based on the adapter frequency of the adapter unit 400 and the frequency of the multiplied reference signal, and to use the intermediate frequency of the half-frequency as the new reference signal frequency. The power supply terminal of the drive sub-circuit 330 is connected to the output terminal of the power supply sub-circuit 310, and the control terminal of the drive sub-circuit 330 is connected to the output terminal of the frequency modulation sub-circuit 320, and to generate a drive signal with the same drive frequency as the intermediate frequency based on the power supply voltage and the frequency modulation signal, and to drive the ultrasonic transducer unit to vibrate based on the drive signal.

[0050] The power supply sub-circuit 310 is connected to an external power supply voltage and is responsible for receiving the power supply voltage from the outside. Specifically, the power supply sub-circuit 310 can be a power input socket, a power distribution unit, or an external power adapter interface, etc. It can process the input power supply voltage and stably provide the processed power supply voltage to the subsequent frequency modulation sub-circuit 320 and drive sub-circuit 330.

[0051] The frequency modulation sub-circuit 320 receives the adaptation frequency from the adaptation unit 400 at its modulation terminal and provides a corresponding reference signal frequency at its reference terminal. This allows it to perform internal logic processing and calculations based on the adaptation frequency and the reference signal frequency to generate a frequency modulation signal at an intermediate frequency. This intermediate frequency is dynamically adjusted according to the adaptation frequency and the reference signal frequency, ensuring that the frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit. Once this intermediate frequency is determined, it is used as the new reference signal frequency for subsequent frequency modulation.

[0052] Optionally, the frequency modulation sub-circuit 320 includes a frequency tracking chip, which is used to average or weighted average the reference signal frequencies of the adaptation frequency and the multiplier to generate the frequency modulation signal at the intermediate frequency, and use the intermediate frequency of the half-frequency as the new reference signal frequency.

[0053] A frequency tracking chip is a dedicated chip module whose main function is to receive the adapted frequency and the multiplied reference signal frequency from the adaptor unit 400, and calculate the corresponding intermediate frequency through complex internal algorithms and logic processing. Specifically, this frequency tracking chip can be a UC3525 series chip, an SG3525 series chip, or other frequency tracking and control chips with similar functions. The frequency tracking chip generates the corresponding frequency modulation signal through averaging or weighted averaging. Averaging calculates the average value of the adapted frequency and the multiplied reference signal frequency, while weighted averaging adds weights to the adapted frequency and the multiplied reference signal frequency, and then calculates the intermediate frequency by dividing the weighted sum of the two by the total weight.

[0054] For example, if the adaptation frequency is 75kHz with a weight of 2, and the reference signal frequency for frequency multiplication is 60kHz with a weight of 1, then the averaged intermediate frequency is 67.5kHz. However, if a weighted average is used, the resulting intermediate frequency is 70kHz. In this process, through continuous iterative driving and adaptation, the corresponding intermediate frequency can be made to continuously approach the vibration frequency of the ultrasonic transducer unit. This also avoids the frequency abrupt changes and increased processing difficulty that may result from directly driving the acquired frequency. Continuous dynamic adjustments based on feedback ensure the effectiveness, reliability, and safety of the adaptation process.

[0055] In the driving unit 300, the driving sub-circuit 330 converts the frequency modulation signal output by the frequency modulation sub-circuit 320 into a driving signal that actually drives the ultrasonic transducer unit to vibrate. Its power supply terminal is connected to the driving terminal of the power supply sub-circuit 310 to obtain a stable power supply voltage, and the corresponding driving signal is generated based on the processing of the power supply voltage. The processing of the power supply voltage is based on the frequency modulation signal. The control terminal of the driving sub-circuit 330 receives the frequency modulation signal output by the frequency modulation sub-circuit 320 and generates a driving signal of the corresponding frequency based on this signal to vibrate the ultrasonic transducer unit. Through the aforementioned continuous adaptation and frequency modulation, the ultrasonic transducer unit is ultimately driven to vibrate at its resonant frequency.

[0056] This application provides a circuit structure of an optional embodiment to implement the function of the driver sub-circuit 330, see reference. Figure 3 The structure of the driver sub-circuit 330 in the diagram. Figure 3 Taking a dual-channel driver chip as an example, the dual-channel driver chip can be TC4426, TC4427 or other similar dual-channel driver chips, which can drive and output corresponding drive signals with high efficiency and stability.

[0057] Optionally, see Figure 5 , Figure 5 yes Figure 1 A schematic diagram of the structure of the driving unit 300 in the embodiment.

[0058] The drive unit 300 further includes at least one of a voltage switching sub-circuit 340 and a boost sub-circuit 350; the voltage switching sub-circuit 340 is connected between the power supply sub-circuit 310 and the drive sub-circuit 330, the control terminal of the voltage switching sub-circuit 340 is used to receive a voltage switching command, the voltage switching sub-circuit 340 is used to acquire multiple preset voltages, and in response to the received voltage switching command, selects one preset voltage for output, so as to replace the power supply voltage of the input drive sub-circuit 330 with the selected preset voltage; the boost sub-circuit 350 is connected between the drive sub-circuit 330 and the vibrator access unit 200, and is used to boost the voltage of the drive signal, and drive the ultrasonic vibrator unit to vibrate based on the boosted drive signal.

[0059] In practical applications of the frequency adaptation circuit 100, different ultrasonic transducer units or different working environments may require different drives to ensure optimal operation. The voltage switching sub-circuit 340 presets multiple voltage levels and selects the appropriate voltage level for output based on the received voltage switching command, thereby achieving precise control of the power supply voltage of the drive sub-circuit 330.

[0060] This application provides a circuit structure of an optional embodiment to implement the function of the voltage switching sub-circuit 340, see reference. Figure 3The voltage switching subcircuit 340 in the diagram is structured as follows. This signal switching subcircuit mainly consists of a multi-stage power supply terminal, a selector, and a control terminal. The multi-stage power supply terminal provides multiple preset voltage levels by connecting different power supply voltages or by dividing the power supply voltage. The selector selects one of the preset voltages for output based on the voltage switching command received from the control terminal. In this example, the voltage divider includes multiple relay switches. Each relay is connected to a corresponding selector circuit composed of an amplifier and diodes to control it. This selector circuit switches the voltage by receiving external control signals, which not only improves the system's flexibility and adaptability but also effectively avoids performance degradation or damage caused by voltage mismatch.

[0061] In ultrasonic instruments, the ultrasonic transducer unit needs to overcome significant mechanical and air resistance during vibration, thus requiring a high driving voltage to ensure sufficient amplitude and power output. The boost circuit 350 amplifies the driving signal voltage to meet the high-voltage requirements of the ultrasonic transducer unit. By amplifying the driving signal, the boost circuit 350 ensures sufficient voltage amplitude upon reaching the ultrasonic transducer unit, enabling it to operate at a higher amplitude. The combination of the voltage switching circuit 340 and the boost circuit 350 allows for the boosting of different voltage levels, creating different settings to drive the ultrasonic transducer unit to vibrate at varying amplitudes or time intervals, meeting the needs of different components.

[0062] This application provides a circuit structure of an optional embodiment to implement the function of the boost sub-circuit 350, see reference. Figure 3 The structure of the boost circuit 350 is described. This boost circuit 350 mainly consists of a transformer and a MOSFET (Metal Oxide Semiconductor Field-Effect Transistor), and includes associated resistors and capacitors. The boost circuit uses the transformer to step up the voltage to better drive the MOSFET, preventing insufficient drive voltage that could cause the MOSFET to fail to turn on and burn out. The MOSFET asynchronously increases the voltage by controlling the current flow. Simultaneously, the transformer also acts as an isolation mechanism, separating the drive circuit from the MOSFET to ensure the safety and reliability of the boost circuit 350.

[0063] It should be noted that in some applications of ultrasonic transducers with relatively stable operating environments and amplitude requirements, and where the corresponding driving voltage can meet the output power requirements, the voltage switching sub-circuit 340 and boost sub-circuit 350 mentioned above can be omitted. Stable ultrasonic transducer driving can be achieved directly by optimizing the design and parameter configuration of the driving sub-circuit 330. For example, when targeting a specific model or specification of ultrasonic transducer, the optimal operating voltage and frequency range can be pre-calculated and tested. Then, a suitable power supply voltage provider and the corresponding driving sub-circuit 330 can be selected to output a driving signal that meets the requirements.

[0064] Optionally, see Figure 6 , Figure 6 yes Figure 1 A schematic diagram of the structure of the oscillator access unit 200 in the embodiment.

[0065] The transducer access unit 200 includes multiple transducer access sockets 210 and a signal switching sub-circuit 220. Each transducer access socket 210 is used to connect an ultrasonic transducer unit. The movable end of the signal switching sub-circuit 220 is selectively connected to each transducer access socket 210, the fixed end of the signal switching sub-circuit 220 is connected to the output end of the drive unit 300, the control end of the signal switching sub-circuit 220 is used to receive control commands, and the movable end of the signal switching sub-circuit 220 selects a transducer access socket 210 to connect to based on the control commands, so as to drive the corresponding ultrasonic transducer unit to vibrate.

[0066] The transducer connector 210 is the physical interface through which the ultrasonic transducer unit connects to the frequency adapter circuit 100. It can reliably connect and transmit electrical energy and signals to each ultrasonic transducer unit. Each transducer connector 210 can be internally configured with elastic contacts, pins, or other types of connection mechanisms to ensure good electrical connection and mechanical stability. By setting up multiple transducer connectors 210, multiple ultrasonic transducer units can be connected to generate corresponding vibration frequencies, meeting the needs of more vibration frequency application scenarios and improving the flexibility and compatibility of the corresponding device and ultrasonic slimming device in application.

[0067] The signal switching sub-circuit 220 is used to automatically select and switch the circuit structure connected to the specific oscillator access unit 200 according to the control command. This control command can be an external command, or it can be a command transmission device built into the corresponding frequency adaptation circuit 100, frequency adaptation device, or ultrasonic slimming device. The command can be automatically generated or manually set. For example, some ultrasonic slimming devices can determine the corresponding fat reduction area through infrared, ultrasonic, pressure sensing, or image sensing, and automatically switch to the most suitable frequency ultrasonic oscillator unit. Other ultrasonic slimming devices switch manually. The signal switching sub-circuit 220 can control corresponding relays, analog switches, or digital switches to switch by connecting to a specific control circuit or an external microcontroller.

[0068] This application provides a circuit structure of an optional embodiment to implement the function of the signal switching sub-circuit 220, see reference. Figure 3 The structure of the signal switching sub-circuit 220 is described. This signal switching sub-circuit 220 is implemented based on a relay and a multiplex double-throw switch, and is controlled by a microcontroller connected to the voltage switching sub-circuit 340 mentioned later. In response to the received control command, the relay will bring the multiplex double-throw switch closer or further away to achieve switching connection with different transducer access units 200, thereby meeting different requirements for the vibration frequency of the ultrasonic transducer unit.

[0069] Optionally, the oscillator access unit 200 further includes a frequency matching sub-circuit 230, which is connected between the output terminal of the drive unit 300 and the drive terminal of the oscillator access unit 200 to smooth the waveform of the drive signal.

[0070] The frequency matching sub-circuit 230 is located between the output terminal of the drive unit 300 and the drive terminal of the transducer access unit 200. It is used to smooth the waveform of the drive signal, ensuring that the drive signal can drive the ultrasonic transducer unit to vibrate more smoothly and stably. This frequency matching sub-circuit 230 can be implemented based on circuit elements such as transformers, filters, or impedance matching networks. These elements can effectively adjust the waveform of the drive signal, reducing waveform distortion and signal reflection, thereby improving the vibration efficiency and stability of the ultrasonic transducer unit.

[0071] This application provides a circuit structure of an optional embodiment to implement the function of the frequency matching sub-circuit 230, see reference. Figure 3The frequency matching sub-circuit 230 is structured as follows. This frequency matching sub-circuit 230 is implemented using a transformer and a capacitor. The transformer provides circuit isolation and, through its inductive characteristics, forms a resonant circuit with the capacitor, further precisely matching the frequency of the drive signal. The capacitor is selected based on the resonant frequency and impedance characteristics of the ultrasonic transducer unit to ensure that the energy of the drive signal is maximized and transmitted to the ultrasonic transducer unit at the resonant point, thus optimizing the vibration effect. This frequency matching sub-circuit 230 effectively smooths the waveform of the drive signal, preventing waveform spikes and sharp angles from damaging the ultrasonic transducer unit during drive.

[0072] for Figure 3 Other parts of the embodiment may optionally include a bridge rectifier circuit composed of four diodes and a capacitor between the voltage switching sub-circuit 340 and the boost sub-circuit 350. This bridge rectifier circuit utilizes the unidirectional conductivity of the diodes to achieve conduction when current flows in one direction and turn off when current flows in the other direction, thereby achieving the rectification effect of AC to DC. Optionally, a transistor structure may also be included between the control terminal and the frequency modulation sub-circuit 320. This transistor can independently control the start and stop of the frequency modulation sub-circuit 320 based on the control terminal, thereby meeting the needs of more operating modes.

[0073] See Figure 7 , Figure 7 This is a schematic diagram of an embodiment of the frequency adaptation device provided in this application. The frequency adaptation device 500 is applied to an ultrasonic transducer unit, including, for example... Figures 1 to 6 The frequency adaptation circuit 100 is described.

[0074] The frequency adaptation device 500 can be a signal generator, frequency converter, frequency adapter, frequency meter, and spectrum analyzer, etc. This application does not specifically limit it, as long as the frequency adaptation device 500 can perform all or part of the functions of the frequency adaptation circuit 100. Since the embodiments of the device part correspond to the embodiments of the frequency adaptation circuit 100 described above, the description of the frequency adaptation device 500 provided by the embodiments of the present invention should refer to the embodiments of the frequency adaptation circuit 100 described above. The embodiments of the present invention will not be described again here, but they have the same beneficial effects as the frequency adaptation circuit 100 described above.

[0075] See Figure 8 , Figure 8 This is a schematic diagram of an embodiment of the ultrasonic slimming device provided in this application. The ultrasonic slimming device 600 includes an ultrasonic transducer unit 610 and a circuit board 620. The ultrasonic transducer unit 610 is used to contact human skin to break down fat in the deeper layers of the skin; the circuit board 620 includes, for example,... Figures 1 to 6The frequency adapter circuit 100 described herein has a circuit board 620 electrically connected to the ultrasonic transducer unit 610 for driving the ultrasonic transducer unit 610 to vibrate.

[0076] The ultrasonic slimming device 600 comes into contact with the human skin surface through the ultrasonic transducer unit 610. Through the vibration of the specific frequency and amplitude of the ultrasonic waves, it can have a fat-burning effect on the deep layer of the skin, which is usually manifested in the decomposition of fat in the fat layer. The ultrasonic waves can penetrate the skin surface and generate vibration and friction on fat cells, thereby destroying the structure of fat cells and promoting the decomposition and metabolism of fat.

[0077] In this ultrasonic slimming device 600, all frequency adaptation circuits 100 can be integrated on a circuit board 620. The ultrasonic transducer unit 610 is electrically connected to the circuit board 620. The circuit board 620 can also be connected to an external power supply and MCU control circuit to receive corresponding enable and control signals, achieving more speed levels, thus enabling the ultrasonic slimming device 600 to meet different application needs. Since the inventive point of the ultrasonic component embodiment is mainly on the circuit board 620, corresponding to the aforementioned embodiment of the frequency adaptation circuit 100, the description of the ultrasonic slimming device 600 provided by this invention should refer to the aforementioned embodiment of the frequency adaptation circuit 100. This invention embodiment will not be described again here, but it has the same beneficial effects as the aforementioned frequency adaptation circuit 100.

[0078] This application discloses a frequency adaptation circuit, device, and ultrasonic slimming device. The frequency adaptation circuit acquires the vibration frequency of the ultrasonic transducer unit in real time through an adaptation unit and adapts the drive signal based on this vibration frequency, so that the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit. The adaptation process of this frequency adaptation circuit does not require manual or programmatic control or adjustment of the drive frequency; it can automatically achieve frequency resonance adaptation, effectively improving the working efficiency and energy utilization of the ultrasonic transducer unit, reducing mechanical energy loss caused by frequency phase difference, reducing the risk of burns from heat generation and wear on the ultrasonic transducer unit, and facilitating the vibration of the ultrasonic transducer unit with higher power output, higher energy efficiency, lower noise, less wear, and greater comfort and safety, thereby ensuring the effectiveness and reliability of the corresponding ultrasonic slimming device.

[0079] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, the frequency adaptation device embodiments and ultrasonic slimming device embodiments are basically similar to the frequency adaptation circuit embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the frequency adaptation circuit embodiments.

[0080] This application can be used in a wide range of general-purpose or special-purpose computing system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc.

[0081] In the several embodiments provided in this application, it should be understood that the disclosed circuits, devices, and ultrasonic slimming devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0082] 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 units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0083] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0084] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A frequency adaptation circuit, applied to an ultrasonic transducer unit, characterized in that, The frequency adaptation circuit includes: A transducer access unit, wherein the access terminal of the transducer access unit is used to access the ultrasonic transducer unit; The driving unit has an input terminal for connecting to a power supply voltage and an output terminal connected to the driving terminal of the oscillator access unit for generating a driving signal and driving the ultrasonic oscillator unit to vibrate based on the driving signal. An adapter unit is provided, with its first end connected to the detection end of the transducer access unit and its second end connected to the frequency modulation end of the drive unit. The adapter unit is used to collect the vibration frequency of the ultrasonic transducer unit and adapt the drive frequency of the drive signal based on the vibration frequency to generate an adapter frequency for adjusting the drive frequency so that the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit. The adapter unit includes: a signal acquisition sub-circuit, the first end of which is connected to the detection end of the oscillator access unit for acquiring the vibration frequency; a signal frequency division sub-circuit, the first end of which is connected to the second end of the signal acquisition sub-circuit for dividing the vibration frequency to obtain a divided frequency; and a signal comparison sub-circuit, the first input end of which is connected to the second end of the signal frequency division sub-circuit, and the second input end of which is connected to the reference end of the driving unit for comparing the divided frequency with the reference signal frequency of the reference end to output a comparison frequency. The reference signal frequency is calculated based on the adaptation frequency and the reference signal frequency at the previous moment. When the frequency division frequency is different from the reference signal frequency, the comparison frequency is the frequency division frequency. The signal frequency multiplier sub-circuit has its first terminal connected to the output terminal of the signal comparison sub-circuit and its second terminal connected to the frequency modulation terminal of the drive unit. It is used to multiply the comparison frequency to obtain the adaptation frequency and output the adaptation frequency to the frequency modulation terminal of the drive unit so that the drive frequency of the drive signal resonates with the vibration frequency of the ultrasonic transducer unit. The driving unit includes: a power supply sub-circuit for receiving the power supply voltage; a frequency modulation sub-circuit, the frequency modulation terminal of which is connected to the second terminal of the adapter unit, the reference terminal of which is used to store and output a reference signal frequency, and to generate a frequency modulation signal with an intermediate frequency based on the adapter frequency of the adapter unit and the reference signal frequency of the frequency modulation multiplied by ...

2. The frequency adaptation circuit according to claim 1, characterized in that, The signal comparison sub-circuit also includes: A pre-comparison module is provided, wherein the first input terminal of the pre-comparison module is connected to the first terminal of the frequency division sub-circuit, the second input terminal of the pre-comparison module is connected to the second terminal of the frequency division sub-circuit, and the output terminal of the pre-comparison module is connected to the first input terminal of the signal comparison sub-circuit, for updating the frequency division frequency.

3. The frequency adaptation circuit according to claim 1, characterized in that, The frequency modulation sub-circuit includes a frequency tracking chip, which is used to average the reference signal frequency of the adaptation frequency and the multiplier to generate the frequency modulation signal of the intermediate frequency, and use the intermediate frequency of the half-frequency as the new reference signal frequency.

4. The frequency adaptation circuit according to claim 1, characterized in that, The driving unit further includes at least one of a voltage switching sub-circuit and a boost sub-circuit; The voltage switching subcircuit is connected between the power supply subcircuit and the drive subcircuit. The control terminal of the voltage switching subcircuit is used to receive a voltage switching command. The voltage switching subcircuit is used to acquire multiple preset voltages and, in response to the received voltage switching command, select one of the preset voltages for output, so as to replace the power supply voltage input to the drive subcircuit with the selected preset voltage. The boost sub-circuit is connected between the drive sub-circuit and the vibrator access unit, and is used to boost the voltage of the drive signal and drive the ultrasonic vibrator unit to vibrate based on the boosted drive signal.

5. The frequency adaptation circuit according to claim 1, characterized in that, The oscillator access unit includes: Multiple transducer access sockets, each of the transducer access sockets being used to connect one of the ultrasonic transducer units; The signal switching subcircuit has an active terminal that is selectively connected to each of the vibrator access sockets, a fixed terminal that is connected to the output terminal of the drive unit, a control terminal that is used to receive control commands, and an active terminal that selects one of the vibrator access sockets to connect to based on the control commands, so as to drive the corresponding ultrasonic vibrator unit to vibrate.

6. The frequency adaptation circuit according to claim 1, characterized in that, The oscillator access unit also includes: A frequency matching sub-circuit is connected between the output terminal of the driving unit and the driving terminal of the oscillator access unit to smooth the waveform of the driving signal.

7. A frequency adaptation device applied to an ultrasonic transducer unit, characterized in that, The frequency adaptation device includes a frequency adaptation circuit as described in any one of claims 1 to 6.

8. An ultrasonic slimming device, characterized in that, The ultrasonic slimming device includes: The ultrasonic transducer unit is used to come into contact with human skin to break down fat in the deeper layers of the skin. A circuit board, the circuit board including a frequency adaptation circuit as described in any one of claims 1 to 6, the circuit board being electrically connected to the ultrasonic transducer unit for driving the ultrasonic transducer unit to vibrate.

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