Ultrasonic probe and ultrasonic equipment

Abstract

The utility model provides an ultrasonic probe and ultrasonic equipment. The ultrasonic probe comprises a transducer, an adjustable resistor, a driving signal input interface, a first electric signal input interface and a first electric signal output interface, the transducer is electrically connected with the driving signal input interface, and the first electric signal input interface, the adjustable resistor and the first electric signal output interface are electrically connected in sequence. The adjustable resistor is used for adjusting the amplitude of an electric signal input by the first electric signal input interface. According to the structure of the ultrasonic probe, it is possible to adjust the frequency of the driving signal output by the host device connected with the ultrasonic probe through the ultrasonic probe, and the working performance of the transducer can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic technology, and more specifically, to an ultrasonic probe and ultrasonic equipment. Background Art

[0002] Ultrasonic devices made using ultrasonic detection technology are widely used. The main structure of ultrasonic devices includes a transducer and a corresponding drive circuit. The drive circuit generates an AC drive signal of a specific frequency to drive the transducer, so that the transducer works in a resonant state.

[0003] However, since the resonant frequency of the transducer is affected by multiple factors such as the transducer material properties and external dimensions, the resonant frequency of the transducers in the same batch often drifts greatly, thus affecting the working performance of the ultrasonic equipment. Utility Model Content

[0004] The purpose of the utility model is to provide an ultrasonic probe and an ultrasonic device to solve at least one of the problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The first aspect of the utility model provides an ultrasonic probe, including a transducer, an adjustable resistor, a drive signal input interface, a first electrical signal input interface and a first electrical signal output interface, the transducer is electrically connected to the drive signal input interface, the first electrical signal input interface, the adjustable resistor and the first electrical signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the electrical signal input by the first electrical signal input interface.

[0007] Optionally, the electrical signal is a voltage signal, and the ultrasonic probe further includes a voltage follower connected between the adjustable resistor and the first electrical signal output interface, and the voltage follower is used to buffer the adjusted voltage signal.

[0008] Optionally, the drive signal input interface is a coaxial cable interface.

[0009] Optionally, the transducer is a piezoelectric ceramic.

[0010] A second aspect of the utility model provides an ultrasonic device, comprising a host device and an ultrasonic probe;

[0011] The ultrasonic probe comprises a transducer, an adjustable resistor, a driving signal input interface, a first voltage signal input interface and a first voltage signal output interface, the transducer is electrically connected to the driving signal input interface, the first voltage signal input interface, the adjustable resistor and the first voltage signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the voltage signal input by the first voltage signal input interface;

[0012] The host device includes a power supply circuit and a second voltage signal output interface electrically connected thereto, and also includes a second voltage signal input interface, a voltage-controlled oscillator, a drive circuit and a drive signal output interface electrically connected in sequence. When the ultrasonic probe is connected to the host device, the first voltage signal input interface is electrically connected to the second voltage signal output interface, the first voltage signal output interface is electrically connected to the second voltage signal input interface, and the drive signal input interface is electrically connected to the drive signal output interface. The power supply circuit is used to output a voltage signal to the second voltage signal output interface, the voltage-controlled oscillator is used to output a square wave signal in response to the voltage signal input by the second voltage signal input interface, and the drive circuit is used to output an AC drive signal to the drive signal output interface in response to the square wave signal to drive the transducer.

[0013] Optionally, the ultrasonic probe further includes a voltage follower connected between the adjustable resistor and the first voltage signal output interface, and the voltage follower is used to buffer the adjusted voltage signal.

[0014] Optionally, the host device also includes an analog operation circuit connected between the second voltage signal input interface and the voltage-controlled oscillator, and a reference voltage source electrically connected to the analog operation circuit, the analog operation circuit is used to calculate a first voltage signal based on the voltage signal input by the second voltage signal input interface and a reference voltage signal output by the reference voltage source, and the voltage-controlled oscillator is used to output a square wave signal in response to the first voltage signal.

[0015] Optionally, the ultrasonic device is an ultrasonic beauty instrument.

[0016] A third aspect of the utility model provides an ultrasonic device, comprising a host device and an ultrasonic probe;

[0017] The ultrasonic probe comprises a transducer, an adjustable resistor, a driving signal input interface, a first current signal input interface and a first current signal output interface, the transducer is electrically connected to the driving signal input interface, the first current signal input interface, the adjustable resistor and the first current signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the current signal input by the first current signal input interface;

[0018] The host device includes a power supply circuit and a second current signal output interface electrically connected thereto, and also includes a second current signal input interface, a conversion circuit, a voltage-controlled oscillator, a drive circuit and a drive signal output interface electrically connected in sequence. When the ultrasonic probe is connected to the host device, the first current signal input interface is electrically connected to the second current signal output interface, the first current signal output interface is electrically connected to the second current signal input interface, and the drive signal input interface is electrically connected to the drive signal output interface. The power supply circuit is used to output a current signal to the second current signal output interface, the conversion circuit is used to convert the current signal input by the second current signal input interface into a voltage signal, the voltage-controlled oscillator is used to output a square wave signal in response to the voltage signal output by the conversion circuit, and the drive circuit is used to output an AC drive signal to the drive signal output interface in response to the square wave signal to drive the transducer.

[0019] Optionally, the ultrasonic device is an ultrasonic beauty instrument.

[0020] The beneficial effects of the utility model are as follows:

[0021] The technical solution described in the utility model makes it possible to use the ultrasonic probe to adjust the frequency of the driving signal output by the host device connected to it, which can avoid driving different transducers with performance differences at the same nominal resonant frequency to affect the normal operation of the transducer, and is conducive to ensuring the working performance of the transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0023] Figure 1 A schematic structural diagram of an ultrasonic probe provided in the first embodiment is shown.

[0024] Figure 2 A schematic structural diagram of an ultrasonic probe provided in the second embodiment is shown.

[0025] Figure 3 A schematic structural diagram of an ultrasonic device provided in Embodiment 3 is shown.

[0026] Figure 4A schematic structural diagram of an ultrasonic device provided in Embodiment 4 is shown.

[0027] Figure 5 A schematic structural diagram of an ultrasonic device provided in Embodiment 5 is shown. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the utility model, the utility model is further described below in conjunction with the embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the utility model.

[0029] Since the resonant frequency of the transducer is affected by many factors such as the transducer material properties and external dimensions, the resonant frequency of the transducers in the same batch often drifts greatly, which will affect the working performance of the ultrasonic equipment. There will also be a problem of driving different transducers with different performance differences with the same nominal resonant frequency, which will affect the normal operation of the transducer.

[0030] An impedance analyzer or a network analyzer can be used to measure the actual resonant frequency of the transducer in the ultrasonic probe before leaving the factory. However, how to enable the host device connected to the ultrasonic probe to adjust the frequency of the drive signal it outputs according to the actual resonant frequency of the ultrasonic probe during operation, thereby ensuring the working performance of the transducer, has become a difficult problem to solve.

[0031] In view of this, the present invention proposes an ultrasonic probe and an ultrasonic device to solve the above problems, which are described below through several embodiments.

[0032] Embodiment 1

[0033] Embodiment 1 provides an ultrasonic probe, such as Figure 1 As shown, the ultrasonic probe includes a transducer 101, an adjustable resistor 102, a drive signal input interface 103, a first electrical signal input interface 104, and a first electrical signal output interface 105. The transducer 101 is electrically connected to the drive signal input interface 103, the first electrical signal input interface 104, the adjustable resistor 102, and the first electrical signal output interface 105 are electrically connected in sequence, and the adjustable resistor 102 is used to adjust the amplitude of the electrical signal input by the first electrical signal input interface 104.

[0034] The ultrasonic probe provided in the first embodiment can adjust the amplitude of the electric signal inputted from the first electric signal input interface 104 by adjusting the resistance value of the adjustable resistor 102, such as a sliding rheostat, and then output it through the first electric signal output interface 105, so that the frequency of the AC driving signal outputted by the host device connected to it can be adjusted by using the ultrasonic probe based on the electric signal outputted through the first electric signal output interface 105, so that the frequency of the AC driving signal outputted by the host device matches the actual resonant frequency of the transducer 101, thereby ensuring the working performance of the transducer 101. And the use of the purely hardware adjustable resistor 102 as the adjustment mechanism has the advantages of low cost and high reliability.

[0035] In a specific example, the electric signal input by the first electric signal input interface 104 is output by a host device connected to the ultrasonic probe. After the electric signal input by the first electric signal input interface 104 is adjusted in amplitude by the adjustable resistor 102, it is output to the host device through the first electric signal output interface 105 to adjust the frequency of the AC drive signal output by the host device. For example, the electric signal can be a voltage signal or a current signal. Taking the electric signal as a voltage signal as an example, when the electric signal is a voltage signal, the first electric signal input interface 104 can be called a first voltage signal input interface, and the first electric signal output interface 105 can be called a first voltage signal output interface.

[0036] In a possible implementation, in the ultrasonic probe provided in the first embodiment, the drive signal input interface 103 is a coaxial cable interface. When the ultrasonic probe is connected to the host device, the AC drive signal output by the host device is input into the ultrasonic probe through the drive signal input interface 103 and drives the transducer 101 to work, and the transducer 101 converts the AC drive signal into a mechanical wave of the same frequency for output.

[0037] In a possible implementation, in the ultrasonic probe provided in the first embodiment, the transducer 101 is a piezoelectric ceramic. The piezoelectric ceramic transducer has the advantages of being easy to manufacture, highly controllable, highly sensitive, and having good electromechanical coupling.

[0038] Embodiment 2

[0039] Embodiment 2 provides an ultrasonic probe, such as Figure 2As shown, the ultrasonic probe includes a transducer 201, an adjustable resistor 202, a drive signal input interface 203, a first voltage signal input interface 204, a first voltage signal output interface 205 and a voltage follower 206. The transducer 201 is electrically connected to the drive signal input interface 203, the first voltage signal input interface 204, the adjustable resistor 202, the voltage follower 206 and the first voltage signal output interface 205 are electrically connected in sequence, the adjustable resistor 202 is used to adjust the amplitude of the voltage signal input by the first voltage signal input interface 204, and the voltage follower 206 is used to buffer the adjusted voltage signal.

[0040] On the basis that the electrical signal in the first embodiment is a voltage signal, the ultrasonic probe provided in the second embodiment adds a voltage follower 206 to buffer the adjusted voltage signal compared to the ultrasonic probe provided in the first embodiment, which can improve the anti-interference ability of the voltage signal adjustment circuit of the ultrasonic probe and enhance its stability.

[0041] In a possible implementation, similar to the first embodiment, in the ultrasonic probe provided in the second embodiment, the drive signal input interface 203 may be a coaxial cable interface. The transducer 201 may be a piezoelectric ceramic.

[0042] Embodiment 3

[0043] Embodiment 3 provides an ultrasonic device, such as Figure 3 As shown, the ultrasonic device includes an ultrasonic probe 310 and a host device 320;

[0044] The ultrasonic probe 310 includes a transducer 311, an adjustable resistor 312, a drive signal input interface 313, a first voltage signal input interface 314 and a first voltage signal output interface 315. The transducer 311 is electrically connected to the drive signal input interface 313, the first voltage signal input interface 314, the adjustable resistor 312 and the first voltage signal output interface 315 are electrically connected in sequence, and the adjustable resistor 315 is used to adjust the amplitude of the voltage signal input by the first voltage signal input interface 314.

[0045] The host device 320 includes a power supply circuit 321 and a second voltage signal output interface 324 electrically connected thereto, and also includes a second voltage signal input interface 325, a voltage-controlled oscillator 322, a driving circuit 326 and a driving signal output interface 323 electrically connected in sequence. When the ultrasonic probe 310 is connected to the host device 320, the first voltage signal input interface 314 is electrically connected to the second voltage signal output interface 324, the first voltage signal output interface 315 is electrically connected to the second voltage signal input interface 325, and the driving signal input interface 313 is electrically connected to the driving signal output interface 323. The power supply circuit 321 is used to output a voltage signal to the second voltage signal output interface 324, the voltage-controlled oscillator 322 is used to output a square wave signal in response to the voltage signal input by the second voltage signal input interface 325, and the driving circuit 326 is used to output an AC driving signal to the driving signal output interface 323 in response to the square wave signal to drive the transducer 311.

[0046] The ultrasonic device provided in the third embodiment can adjust the resistance value of the adjustable resistor 312. When the ultrasonic probe 310 is connected to the host device 320, the voltage signal inputted from the first voltage signal input interface 314 is adjusted in amplitude and then outputted to the voltage-controlled oscillator 322 through the first voltage signal output interface 315. Thus, based on the voltage signal outputted through the first voltage signal output interface 315, the ultrasonic probe 310 can be used to adjust the frequency of the square wave signal outputted by the voltage-controlled oscillator 322 of the host device 320 connected thereto, thereby adjusting the frequency of the AC drive signal outputted by the drive circuit 326 (the AC drive signal is synchronized with the square wave signal frequency), so that the frequency of the AC drive signal outputted by the host device 320 matches the actual resonant frequency of the transducer 311, thereby ensuring the working performance of the transducer 311. Moreover, the use of the purely hardware adjustable resistor 312 as the adjustment mechanism has the advantages of low cost and high reliability.

[0047] When the host device 320 is connected to different ultrasonic probes, the adjustable resistor in the ultrasonic probe can adjust the voltage signal to different amplitudes according to the resistance value set at the factory, so that the frequency of the square wave signal output by the voltage-controlled oscillator 322 adapts to the actual resonant frequency of the transducer in the ultrasonic probe, thereby simply and effectively achieving frequency matching of the AC drive signal when the actual resonant frequency of the transducer in the ultrasonic probe drifts compared to the nominal value.

[0048] In one possible implementation, Figure 3 As shown, similar to the second embodiment, in the ultrasonic device provided in the third embodiment, the ultrasonic probe 310 also includes a voltage follower 316 connected between the adjustable resistor 312 and the first voltage signal output interface 315, and the voltage follower 316 is used to buffer the adjusted voltage signal.

[0049] like Figure 3 As shown, the signal flow of the ultrasonic device provided in Example 3 is as follows: when the ultrasonic probe 310 is connected to the host device 320, the power supply circuit 321 outputs an initial voltage signal to the second voltage signal output interface 324, and then the initial voltage signal enters the adjustable resistor 312 through the first voltage signal input interface 314 to adjust the voltage value, the adjusted voltage signal is buffered by the voltage follower 316 and output by the first voltage signal output interface 315, and then the adjusted voltage signal enters the voltage-controlled oscillator 322 through the second voltage signal input interface 325, the voltage-controlled oscillator 322 outputs a square wave signal in response to the adjusted voltage signal, the drive circuit 326 outputs an AC drive signal to the drive signal output interface 323 in response to the square wave signal, and then the AC drive signal enters the transducer 311 through the drive signal input interface 313 to drive it.

[0050] In a possible implementation, similar to the first embodiment, in the ultrasonic device provided in the third embodiment, the drive signal input interface 313 of the ultrasonic probe 310 may be a coaxial cable interface, and it is understandable that the drive signal output interface 323 of the host device 320 matches the type of the drive signal input interface 313 of the ultrasonic probe 310. The drive signal output interface 323 connects the positive and negative output terminals of the drive circuit 326 inside the host device 320, and the drive signal input interface 313 connects the positive and negative electrodes of the transducer 311 inside the ultrasonic probe 310. The transducer 311 of the ultrasonic probe 310 may be a piezoelectric ceramic.

[0051] In a specific example, in the ultrasonic device provided in the third embodiment, the driving circuit 326 in the host device 320 may be a half-bridge driving circuit or other forms of driving circuits.

[0052] In a specific example, for example, the ultrasonic device provided in the third embodiment is a handheld ultrasonic device, and the host device and the ultrasonic probe have a matching card connection device, for example, the host device is provided with a card slot, and the ultrasonic probe can be carded in the card slot, thereby forming an integrated structure. For another example, the host device and the ultrasonic probe can be connected via an external connecting line. Under this structure, the host device can be a desktop device, and the ultrasonic probe is a handheld probe, realizing a split setting.

[0053] In a possible implementation, the ultrasonic device provided in Embodiment 3 may be an ultrasonic beauty instrument.

[0054] Embodiment 4

[0055] Embodiment 4 provides an ultrasonic device, such as Figure 4As shown, different from the third embodiment, in the ultrasonic device provided by the fourth embodiment, the host device 320 also includes an analog operation circuit 327 connected between the second voltage signal input interface 325 and the voltage-controlled oscillator 322, and a reference voltage source 328 electrically connected to the analog operation circuit 327, the analog operation circuit 327 is used to calculate the first voltage signal according to the voltage signal input by the second voltage signal input interface 325 and the reference voltage signal output by the reference voltage source 328, and the voltage-controlled oscillator 322 is used to output a square wave signal in response to the first voltage signal. Thus, the influence of the error of the voltage value of the voltage signal adjusted by the adjustable resistor 312 can be reduced, and the adjustment accuracy of the frequency of the square wave signal output by the voltage-controlled oscillator 322 achieved by adjusting the voltage value of the voltage signal by the adjustable resistor 312 can be improved.

[0056] In a specific example, it is assumed that the voltage value of the initial voltage signal output by the power supply circuit 321 to the second voltage signal output interface 324 is V base , the voltage value of the voltage signal adjusted by the adjustable resistor 312 is V in , the operation relationship of the analog operation circuit 327 is set to V out =V base +V in ×P, where P is the constant coefficient of the analog operation circuit 327, for example, the value of P is 0.1.

[0057] The transducer 311 in the ultrasonic probe 310 requires the input voltage value of the voltage-controlled oscillator 322 in the host device 320 to be V, so that when the frequency of the AC drive signal output by the host device 320 is F, the resistance value of the adjustable resistor 312 is adjusted so that the voltage value of the adjusted voltage signal is V in , the voltage value of the voltage signal output by the analog operation circuit 327 to the voltage-controlled oscillator 322 satisfies V=V out =V base +0.1×V in , the frequency matching of the AC drive signal can be achieved.

[0058] Embodiment 5

[0059] Embodiment 5 provides an ultrasonic device, such as Figure 5 As shown, the ultrasonic device includes an ultrasonic probe 510 and a host device 520;

[0060] The ultrasonic probe 510 includes a transducer 511, an adjustable resistor 512, a drive signal input interface 513, a first current signal input interface 514 and a first current signal output interface 515. The transducer 511 is electrically connected to the drive signal input interface 513, the first current signal input interface 514, the adjustable resistor 512 and the first current signal output interface 515 are electrically connected in sequence, and the adjustable resistor 512 is used to adjust the amplitude of the current signal input by the first current signal input interface 514.

[0061] The host device 520 includes a power supply circuit 521 and a second current signal output interface 524 electrically connected thereto, and also includes a second current signal input interface 525, a conversion circuit 527, a voltage-controlled oscillator 522, a drive circuit 526 and a drive signal output interface 523 electrically connected in sequence. When the ultrasonic probe 510 is connected to the host device 520, the first current signal input interface 514 is electrically connected to the second current signal output interface 524, the first current signal output interface 515 is electrically connected to the second current signal input interface 525, and the drive signal input interface 513 is electrically connected to the drive signal output interface 523. The power supply circuit 521 is used to output a current signal to the second current signal output interface 524, the conversion circuit 527 is used to convert the current signal input by the second current signal input interface 525 into a voltage signal, the voltage-controlled oscillator 522 is used to output a square wave signal in response to the voltage signal output by the conversion circuit 527, and the drive circuit 526 is used to output an AC drive signal to the drive signal output interface 623 in response to the square wave signal to drive the transducer 511.

[0062] Compared with the third embodiment, in the ultrasonic device provided in the fifth embodiment, by adjusting the resistance value of the adjustable resistor 512, when the ultrasonic probe 510 is connected to the host device 520, the current signal input by the first current signal input interface 514 is amplitude adjusted and then output to the conversion circuit 527 through the first current signal output interface 315 to be converted into a voltage signal and then output to the voltage-controlled oscillator 322, thereby improving the anti-interference ability of the ultrasonic device and enhancing its stability.

[0063] In a possible implementation, similar to the first embodiment, in the ultrasonic device provided in the fifth embodiment, the drive signal input interface 513 of the ultrasonic probe 510 may be a coaxial cable interface, and it is understandable that the drive signal output interface 523 of the host device 520 matches the type of the drive signal input interface 513 of the ultrasonic probe 510. The transducer 511 of the ultrasonic probe 510 may be a piezoelectric ceramic.

[0064] In a possible implementation, the ultrasonic device provided in Embodiment 5 may be an ultrasonic beauty instrument.

[0065] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0066] It should also be noted that, in the description of the present utility model, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0067] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An ultrasonic probe, characterized in that: It includes a transducer, an adjustable resistor, a drive signal input interface, a first electrical signal input interface and a first electrical signal output interface, the transducer is electrically connected to the drive signal input interface, the first electrical signal input interface, the adjustable resistor and the first electrical signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the electrical signal input by the first electrical signal input interface.

2. The ultrasonic probe according to claim 1, characterized in that: The electrical signal is a voltage signal, and the ultrasonic probe further includes a voltage follower connected between the adjustable resistor and the first electrical signal output interface, and the voltage follower is used to buffer the adjusted voltage signal.

3. The ultrasonic probe according to claim 1, characterized in that: The driving signal input interface is a coaxial cable interface.

4. The ultrasonic probe according to claim 1, characterized in that: The transducer is a piezoelectric ceramic.

5. An ultrasonic device, characterized in that: It includes a host device and an ultrasonic probe; The ultrasonic probe comprises a transducer, an adjustable resistor, a driving signal input interface, a first voltage signal input interface and a first voltage signal output interface, the transducer is electrically connected to the driving signal input interface, the first voltage signal input interface, the adjustable resistor and the first voltage signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the voltage signal input by the first voltage signal input interface; The host device includes a power supply circuit and a second voltage signal output interface electrically connected thereto, and also includes a second voltage signal input interface, a voltage-controlled oscillator, a drive circuit and a drive signal output interface electrically connected in sequence. When the ultrasonic probe is connected to the host device, the first voltage signal input interface is electrically connected to the second voltage signal output interface, the first voltage signal output interface is electrically connected to the second voltage signal input interface, and the drive signal input interface is electrically connected to the drive signal output interface. The power supply circuit is used to output a voltage signal to the second voltage signal output interface, the voltage-controlled oscillator is used to output a square wave signal in response to the voltage signal input by the second voltage signal input interface, and the drive circuit is used to output an AC drive signal to the drive signal output interface in response to the square wave signal to drive the transducer.

6. The ultrasonic device according to claim 5, characterized in that The ultrasonic probe further includes a voltage follower connected between the adjustable resistor and the first voltage signal output interface, and the voltage follower is used to buffer the adjusted voltage signal.

7. The ultrasonic device according to claim 5, characterized in that The host device also includes an analog operation circuit connected between the second voltage signal input interface and the voltage-controlled oscillator, and a reference voltage source electrically connected to the analog operation circuit, the analog operation circuit is used to calculate a first voltage signal based on the voltage signal input by the second voltage signal input interface and the reference voltage signal output by the reference voltage source, and the voltage-controlled oscillator is used to output a square wave signal in response to the first voltage signal.

8. The ultrasonic device according to claim 5, characterized in that The ultrasonic device is an ultrasonic beauty instrument.

9. An ultrasonic device, characterized in that: It includes a host device and an ultrasonic probe; The ultrasonic probe comprises a transducer, an adjustable resistor, a driving signal input interface, a first current signal input interface and a first current signal output interface, the transducer is electrically connected to the driving signal input interface, the first current signal input interface, the adjustable resistor and the first current signal output interface are electrically connected in sequence, and the adjustable resistor is used to adjust the amplitude of the current signal input by the first current signal input interface; The host device includes a power supply circuit and a second current signal output interface electrically connected thereto, and also includes a second current signal input interface, a conversion circuit, a voltage-controlled oscillator, a drive circuit and a drive signal output interface electrically connected in sequence. When the ultrasonic probe is connected to the host device, the first current signal input interface is electrically connected to the second current signal output interface, the first current signal output interface is electrically connected to the second current signal input interface, and the drive signal input interface is electrically connected to the drive signal output interface. The power supply circuit is used to output a current signal to the second current signal output interface, the conversion circuit is used to convert the current signal input by the second current signal input interface into a voltage signal, the voltage-controlled oscillator is used to output a square wave signal in response to the voltage signal output by the conversion circuit, and the drive circuit is used to output an AC drive signal to the drive signal output interface in response to the square wave signal to drive the transducer.

10. The ultrasonic device according to claim 9, characterized in that The ultrasonic device is an ultrasonic beauty instrument.

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