An ultrasonic transducer driving method for controlling amplitude in real time, an ultrasonic host and an ultrasonic transducer

Abstract

The application relates to the technical field of transducer driving, and discloses an ultrasonic transducer driving method for real-time control of amplitude, an ultrasonic host and an ultrasonic transducer. The method is applied to an ultrasonic host, the ultrasonic host is connected with the ultrasonic transducer, the ultrasonic transducer is provided with a driving ceramic group and a detection ceramic group, the driving ceramic group is used for generating vibration under the action of a driving signal to make the ultrasonic transducer vibrate, and the detection ceramic group is arranged on a vibration propagation path of the ultrasonic transducer. The method comprises the following steps: in the working process of the ultrasonic transducer, the current amplitude of the ultrasonic transducer is collected through the detection ceramic group; the driving signal is adjusted based on a preset target amplitude and the current amplitude, and the adjusted driving signal is transmitted to the driving ceramic group, so that the ultrasonic transducer vibrates according to the preset target amplitude. According to the application, the ultrasonic transducer can avoid amplitude fluctuation caused by load change factors, and the safety hidden danger is reduced.

Description

Technical Field

[0001] This application relates to the field of transducer driving technology, and in particular to an ultrasonic transducer driving method for real-time amplitude control, an ultrasonic host, and an ultrasonic transducer. Background Technology

[0002] Currently, in clinical spinal surgery, procedures such as laminectomy and spinal decompression generally require the use of an ultrasonic bone scalpel. The ultrasonic transducer outputs a drive signal from the main unit to the ultrasonic bone scalpel. Driven by the drive signal, the ultrasonic transducer causes the blade of the ultrasonic bone scalpel to vibrate at high frequency, achieving precise cutting of bone tissue. To achieve high-frequency vibration of the blade, the inverse piezoelectric effect of the piezoelectric ceramic (drive ceramic assembly) on the ultrasonic transducer is generally utilized to convert the high-frequency electrical drive signal into mechanical vibration energy.

[0003] However, existing ultrasonic bone scalpel main units generally adopt an open-loop control method, with two main control strategies: constant current control and constant voltage control. During surgery, if the load on the scalpel tip (such as bone tissue hardness, density, and cutting depth) changes, even if the voltage is kept constant using the above two methods, the actual amplitude of the scalpel tip will still fluctuate due to the load change. For example, when the scalpel tip transitions from cutting high-density cortical bone to cutting low-density cancellous bone, the load suddenly decreases, and the scalpel tip amplitude may suddenly increase. If the scalpel tip is near nerve tissue at this time, it is very easy for uncontrolled amplitude to cause nerve thermal or mechanical damage to the patient, posing a significant safety hazard. Summary of the Invention

[0004] The main purpose of this application is to provide an ultrasonic transducer driving method, ultrasonic host and ultrasonic transducer for real-time amplitude control, in order to solve the technical problem that the existing control method is prone to amplitude fluctuation when the load on the cutter changes, which poses a great safety hazard.

[0005] To achieve the above objectives, this application provides a real-time amplitude control method for driving an ultrasonic transducer. The method is applied to an ultrasonic host, which is connected to an ultrasonic transducer. The ultrasonic transducer is equipped with a driving ceramic group and a detection ceramic group. The driving ceramic group is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate. The detection ceramic group is disposed on the vibration propagation path of the ultrasonic transducer. The method includes: During the operation of the ultrasonic transducer, the current amplitude of the ultrasonic transducer is collected by the detection ceramic group; The driving signal is adjusted based on the preset target amplitude and the current amplitude, and the adjusted driving signal is transmitted to the driving ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0006] In one embodiment, the step of acquiring the current amplitude of the ultrasonic transducer through the detection ceramic group during the operation of the ultrasonic transducer includes: During the operation of the ultrasonic transducer, the detection signal fed back by the detection ceramic group is acquired; The detection signal is converted by a preset mapping relationship to determine the current amplitude of the ultrasonic transducer.

[0007] In one embodiment, a blade is connected to one end of the ultrasonic transducer; Before the step of acquiring the detection signal fed back by the detection ceramic assembly during the operation of the ultrasonic transducer, the method further includes: Establish a first relationship between the deformation of the ceramic detection assembly and the amplitude of the cutting head; Establish a second relationship between the detection signal of the ceramic detection group and the deformation of the ceramic detection group; A preset mapping relationship is constructed based on the first relation and the second relation.

[0008] In one embodiment, the step of establishing a first relationship between the deformation of the detected ceramic assembly and the amplitude of the cutting head includes: Determine the first vibration displacement and the second vibration displacement of the detection ceramic group at its location. The first vibration displacement is the vibration displacement of the detection ceramic group on the side closer to the cutter head, and the second vibration displacement is the vibration displacement of the detection ceramic group on the side farther away from the cutter head. A third relationship is established between the first vibration displacement and the amplitude of the cutter head, and a fourth relationship is established between the second vibration displacement and the amplitude of the cutter head; Based on the third and fourth relations, a first relation is established between the deformation of the detected ceramic group and the amplitude of the cutter head.

[0009] In one embodiment, the step of adjusting the driving signal based on a preset target amplitude and the current amplitude, and transmitting the adjusted driving signal to the driving ceramic assembly to cause the ultrasonic transducer to vibrate according to the preset target amplitude, includes: Determine the amplitude difference between the preset target amplitude and the current amplitude; The output power setting value is determined based on the amplitude difference. The driving voltage amplitude of the driving signal is adjusted based on the output power setting value; An adjusted drive signal is generated based on the adjusted drive voltage amplitude, and the adjusted drive signal is transmitted to the drive ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0010] In one embodiment, the method further includes: Acquire the driving voltage and driving current of the driving signal, and determine the current phase difference between the driving voltage and the driving current; Determine the phase difference value between the current phase difference and the preset phase difference, and determine the target frequency setting value of the driving signal based on the phase difference value; The frequency of the drive signal is adjusted to the target frequency setting value to generate the adjusted drive signal; The adjusted driving signal is transmitted to the driving ceramic assembly so that the driving ceramic assembly vibrates in a resonant state according to the preset target amplitude.

[0011] In addition, to achieve the above objectives, this application also proposes an ultrasound host, which includes: a memory, a processor, and a driver program stored in the memory and executable on the processor. When the driver program is executed by the processor, it implements the steps of the driving method described above.

[0012] In addition, to achieve the above objectives, this application also proposes an ultrasonic transducer for real-time amplitude control, the ultrasonic transducer comprising: a driving ceramic assembly, a detection ceramic assembly, and a transducer body; The driving ceramic assembly and the detection ceramic assembly are disposed on the transducer body; The driving ceramic assembly is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate, and the detection ceramic assembly is disposed on the vibration propagation path of the ultrasonic transducer. The ultrasonic transducer is connected to the ultrasonic host. The ultrasonic host is used to collect the current amplitude of the ultrasonic transducer through the detection ceramic group during the operation of the ultrasonic transducer; adjust the driving signal based on the preset target amplitude and the current amplitude; and transmit the adjusted driving signal to the driving ceramic group so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0013] In one embodiment, the transducer body further includes a rear cover plate and a front cover plate connected in sequence; The drive ceramic assembly is located between the rear cover plate and the front cover plate; The detection ceramic assembly is located between the rear cover and the drive ceramic assembly, or between the drive ceramic assembly and the front cover, or the detection ceramic assembly is located on the front cover.

[0014] In one embodiment, the transducer body further includes: a middle cover plate; The detection ceramic assembly is located between the rear cover plate and the middle cover plate, and the driving ceramic assembly is located between the middle cover plate and the front cover plate.

[0015] This application provides a method for driving an ultrasonic transducer with real-time amplitude control, an ultrasonic host, and an ultrasonic transducer. The method is applied to an ultrasonic host connected to an ultrasonic transducer. The ultrasonic transducer is equipped with a driving ceramic group and a detection ceramic group. The driving ceramic group is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate. The detection ceramic group is disposed on the vibration propagation path of the ultrasonic transducer. The method includes: during the operation of the ultrasonic transducer, acquiring the current amplitude of the ultrasonic transducer through the detection ceramic group; adjusting the driving signal based on a preset target amplitude and the current amplitude, and transmitting the adjusted driving signal to the driving ceramic group to make the ultrasonic transducer vibrate according to the preset target amplitude.

[0016] In this application, during the operation of an ultrasonic transducer, the ultrasonic host acquires the current vibration amplitude of the ultrasonic transducer through a detection ceramic group installed on the transducer. The detection ceramic group is positioned along the vibration propagation path to sense vibration. A preset target amplitude is then compared with the acquired current amplitude. Based on the comparison result, the ultrasonic host adjusts the drive signal so that the adjusted drive signal can drive the ultrasonic transducer closer to the preset target amplitude. Finally, the adjusted drive signal is transmitted to the drive ceramic group on the ultrasonic transducer. Upon receiving the adjusted drive signal, the drive ceramic group vibrates under the action of the drive signal, causing the ultrasonic transducer to vibrate according to the preset target amplitude. Because this application acquires the current amplitude in real time through the detection ceramic group positioned along the vibration propagation path during the operation of the ultrasonic transducer, and performs closed-loop adjustment of the drive signal based on the preset target amplitude and the current amplitude, compared to existing open-loop drive methods, this application can achieve real-time closed-loop control of the ultrasonic transducer amplitude, ensuring that the ultrasonic transducer always vibrates stably according to the preset target amplitude, thereby avoiding amplitude fluctuations caused by load changes and reducing safety hazards. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the ultrasonic host structure of the hardware operating environment involved in the embodiments of this application; Figure 2 This is a flowchart illustrating the first embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application. Figure 3 This is a schematic diagram of the ultrasonic host and ultrasonic transducer structure in the ultrasonic transducer driving method for real-time amplitude control of this application. Figure 4 This is a flowchart illustrating the second embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application. Figure 5 This is a displacement diagram of the ultrasonic transducer at various positions in the ultrasonic transducer driving method for real-time amplitude control of this application. Figure 6 This is a displacement diagram of the ceramic assembly at various positions in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 7 This is a diagram showing the inverse piezoelectric effect relationship of the detected ceramic group in the ultrasonic transducer driving method for real-time amplitude control of this application. Figure 8 This is a graph showing the relationship between the sampling voltage and the driving voltage in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 9 This is a flowchart illustrating the third embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application. Figure 10 This is a flowchart of constant amplitude control and constant frequency control in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 11 This is a flowchart of the constant amplitude control process in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 12 This is a flowchart of the constant frequency control process in the ultrasonic transducer driving method for real-time amplitude control in this application.

[0020] Explanation of icon numbers:

[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0023] Reference Figure 1 , Figure 1 This is a schematic diagram of the ultrasonic host structure of the hardware operating environment involved in the embodiments of this application.

[0024] like Figure 1 As shown, the ultrasound host may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen, and optionally, it may also include a standard wired interface or a wireless interface. In this application, the wired interface of the user interface 1003 may be a USB interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a non-volatile memory (NVM), such as a disk storage device. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0025] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the ultrasound host and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0026] like Figure 1 As shown, the memory 1005, which is identified as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an ultrasonic transducer driver for real-time amplitude control.

[0027] exist Figure 1 In the ultrasound host shown, the network interface 1004 is mainly used to connect to the backend server and communicate data with the backend server; the user interface 1003 is mainly used to connect to the user equipment; the ultrasound host calls the real-time amplitude control ultrasound transducer driver stored in the memory 1005 through the processor 1001 and executes the real-time amplitude control ultrasound transducer driving method provided in the embodiments of this application.

[0028] It should be noted that currently, in clinical spinal surgery, procedures such as laminectomy and spinal decompression generally require the ultrasonic bone scalpel main unit to output a drive signal to the ultrasonic transducer of the ultrasonic bone scalpel. Driven by the drive signal, the ultrasonic transducer drives the blade of the ultrasonic bone scalpel to perform high-frequency micro-vibration to achieve precise cutting of bone tissue. To achieve high-frequency vibration of the blade, the inverse piezoelectric effect of the piezoelectric ceramic (drive ceramic assembly) on the ultrasonic transducer is generally used to convert the high-frequency electrical drive signal into mechanical vibration energy.

[0029] However, existing ultrasonic bone scalpel main units generally adopt an open-loop control method, with two main control strategies: constant current control and constant voltage control. Constant current control ensures the ultrasonic transducer always operates near its resonant frequency, thus maintaining a stable drive signal output to drive the transducer's vibration. Constant voltage control ensures the ultrasonic transducer operates at its anti-resonant point, also achieving a stable power supply. The common goal of both methods is to ensure sufficient power to maintain transducer oscillation, thereby ensuring the equipment functions properly.

[0030] However, during surgery, if the load on the cutting head (such as bone tissue hardness, density, and cutting depth) changes, even if the voltage can be kept constant using the two methods mentioned above, the actual amplitude of the cutting head will still fluctuate due to the load change. For example, when the cutting head transitions from cutting high-density cortical bone to cutting low-density cancellous bone, the load suddenly decreases, and the cutting head amplitude may suddenly increase. If the cutting head is near nerve tissue at this time, it is very easy to cause nerve thermal or mechanical damage to the patient due to uncontrolled amplitude, posing a significant safety hazard.

[0031] Therefore, to address the aforementioned shortcomings, this embodiment provides a real-time amplitude control method for driving an ultrasonic transducer. The method is applied to an ultrasonic host connected to an ultrasonic transducer. The ultrasonic transducer is equipped with a driving ceramic group and a detection ceramic group. The driving ceramic group generates vibration under the action of a driving signal to cause the ultrasonic transducer to vibrate. The detection ceramic group is positioned along the vibration propagation path of the ultrasonic transducer. The method includes: during the operation of the ultrasonic transducer, acquiring the current amplitude of the ultrasonic transducer through the detection ceramic group; adjusting the driving signal based on a preset target amplitude and the current amplitude; and transmitting the adjusted driving signal to the driving ceramic group to cause the ultrasonic transducer to vibrate according to the preset target amplitude.

[0032] In this embodiment, during the operation of the ultrasonic transducer, the ultrasonic host collects the current vibration amplitude of the ultrasonic transducer through a detection ceramic group installed on the transducer. The detection ceramic group is positioned along the vibration propagation path to sense vibration. Then, a preset target amplitude is compared with the collected current amplitude. Based on the comparison result, the ultrasonic host adjusts the drive signal so that the adjusted drive signal can drive the ultrasonic transducer closer to the preset target amplitude. Finally, the adjusted drive signal is transmitted to the drive ceramic group on the ultrasonic transducer. Upon receiving the adjusted drive signal, the drive ceramic group vibrates under the action of the drive signal, causing the ultrasonic transducer to vibrate according to the preset target amplitude. Because this embodiment collects the current amplitude in real time through the detection ceramic group positioned along the vibration propagation path during the operation of the ultrasonic transducer, and performs closed-loop adjustment of the drive signal based on the preset target amplitude and the current amplitude, compared to existing open-loop drive methods, this embodiment can achieve real-time closed-loop control of the ultrasonic transducer amplitude, ensuring that the ultrasonic transducer always vibrates stably according to the preset target amplitude, thereby avoiding amplitude fluctuations caused by load changes and reducing safety hazards.

[0033] For ease of understanding, the following is combined with Figures 2 to 12 The ultrasonic transducer driving method for real-time amplitude control provided in the embodiments of this application will be described in detail.

[0034] Reference Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application. The first embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application is presented as follows: Figure 2 As shown, in this embodiment, the method includes: Step S10: During the operation of the ultrasonic transducer, the current amplitude of the ultrasonic transducer is collected by the detection ceramic group 2.

[0035] It is understood that the method of this embodiment can be applied to an ultrasonic host, which is connected to an ultrasonic transducer. The ultrasonic transducer is provided with a driving ceramic group 1 and a detection ceramic group 2. The driving ceramic group 1 is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate. The detection ceramic group 2 is disposed on the vibration propagation path of the ultrasonic transducer.

[0036] For ease of understanding, please refer to Figure 3 , Figure 3 This is a schematic diagram of the ultrasonic main unit and ultrasonic transducer structure in the real-time amplitude control ultrasonic transducer driving method of this application. Figure 3As shown, it should be noted that the aforementioned ultrasound host can refer to a medical device used to control the operation of the ultrasound transducer and process ultrasound signals, typically used in ultrasound imaging or ultrasound therapy systems. The aforementioned ultrasound transducer can refer to a device that converts electrical signals into mechanical vibrations (i.e., ultrasound waves), capable of real-time amplitude control, that is, dynamically adjusting the vibration amplitude based on feedback signals. In this embodiment, the ultrasound host can be electrically connected to the ultrasound transducer, and the ultrasound host outputs a drive signal to drive the ultrasound transducer to vibrate.

[0037] It should also be noted that, such as Figure 3 As shown, in this embodiment, the ultrasonic transducer may include: a driving ceramic assembly 1, a detection ceramic assembly 2, and a transducer body 3; the driving ceramic assembly 1 and the detection ceramic assembly 2 are disposed on the transducer body 3.

[0038] The aforementioned transducer body 3 refers to the mechanical structure of the ultrasonic transducer that supports the drive ceramic assembly 1 and the detection ceramic assembly 2. It can be made of metal or other sound-conducting materials and serves to transmit vibrational energy. The drive ceramic assembly 1 and the detection ceramic assembly 2 can be housed within the transducer body 3, either mounted on or within it, allowing the vibration generated by the drive ceramic assembly 1 to propagate to the detection ceramic assembly 2 through the transducer body 3. It is understood that the aforementioned driving ceramic assembly 1 can refer to the piezoelectric ceramic element in the ultrasonic transducer used to receive the driving signal and generate the inverse piezoelectric effect. Under the action of the driving signal, the driving ceramic assembly 1 can deform and generate mechanical vibration, thereby causing the entire ultrasonic transducer to vibrate.

[0039] It is also understood that the aforementioned detection ceramic group 2 may refer to the piezoelectric ceramic element in the ultrasonic transducer used to detect vibration signals. It can be set in the vibration propagation path. When the vibration propagates to the detection ceramic group 2, the detection ceramic group 2 will generate a corresponding detection signal due to the positive piezoelectric effect. This detection signal can be used to monitor the actual vibration state of the ultrasonic transducer.

[0040] It should be understood that the aforementioned current amplitude can refer to the vibration amplitude of the ultrasonic transducer during the vibration process, and can be used to characterize the intensity of the ultrasonic transducer's vibration. For example... Figure 3 As shown, during operation, the ultrasonic main unit can be electrically connected to the drive ceramic assembly 1 (e.g., via a cable), thereby transmitting the generated drive signal to the drive ceramic assembly 1 (i.e., Figure 3 The driving voltage Vd drives the ceramic assembly 1 to vibrate under the action of the driving signal, thereby causing the cutter head 4 connected to one end of the transducer body 3 to vibrate and perform cutting operations.

[0041] It should also be understood that, since the detection ceramic group 2 is located on the propagation path of the vibration, the vibration can be propagated to the detection ceramic group 2 through the transducer body 3. Upon receiving the vibration, the detection ceramic group 2 generates a detection signal proportional to the vibration amplitude due to the piezoelectric effect (i.e.,...). Figure 3 The sampling voltage Vs). The ultrasonic host can be electrically connected to the detection ceramic group 2 (e.g., via cable), and then the ultrasonic host acquires the detection signal, and performs amplification, filtering and analog-to-digital conversion processing on the detection signal to extract the characteristic value reflecting the vibration amplitude as the current amplitude of the ultrasonic transducer.

[0042] Step S20: Adjust the driving signal based on the preset target amplitude and the current amplitude, and transmit the adjusted driving signal to the driving ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0043] It should be noted that the aforementioned preset target amplitude may refer to the vibration amplitude value that the user or system pre-sets and expects the ultrasonic transducer to achieve. It can be determined according to the specific needs of ultrasonic therapy or ultrasonic imaging, and this embodiment does not limit it.

[0044] It should also be noted that the aforementioned driving signal can refer to an electrical signal used to drive the ceramic assembly 1 to generate vibration, and may include parameters such as frequency and voltage amplitude. Furthermore, adjusting the driving signal can involve changing the voltage amplitude, duty cycle, or other electrical parameters of the driving signal, thereby changing the vibration intensity generated by the ceramic assembly 1.

[0045] In its implementation, after the ultrasonic host obtains the current amplitude fed back by the detection ceramic group 2, it compares the current amplitude with the preset target amplitude. Then, based on the comparison result, it determines the deviation between the current amplitude and the preset target amplitude. The drive signal is then adjusted based on the deviation. For example, if the current amplitude is less than the preset target amplitude, the voltage amplitude of the drive signal is increased or other relevant parameters are adjusted to enhance the vibration intensity of the drive ceramic group 1; if the current amplitude is greater than the preset target amplitude, the voltage amplitude of the drive signal is decreased to weaken the vibration intensity of the drive ceramic group 1. After adjusting the drive signal, the ultrasonic host can transmit the adjusted drive signal to the drive ceramic group 1. Upon receiving the adjusted drive signal, the drive ceramic group 1 generates vibration of corresponding intensity under the action of the adjusted drive signal, which propagates through the transducer body 3, causing the cutter head 4 to vibrate according to the preset target amplitude. Subsequently, the detection ceramic group 2 continues to acquire new current amplitudes, and the ultrasonic host repeats the above comparison and adjustment process, forming a closed-loop control, until the current amplitude stabilizes near the preset target amplitude.

[0046] Therefore, in this embodiment, during the operation of the ultrasonic transducer, the current amplitude is collected in real time by the detection ceramic group 2 set on the vibration propagation path, and the driving signal is adjusted in a closed loop based on the preset target amplitude and the current amplitude. Compared with the existing open-loop driving method, this embodiment can realize real-time closed-loop control of the ultrasonic transducer amplitude, so that the ultrasonic transducer always vibrates stably according to the preset target amplitude, thereby avoiding amplitude fluctuations caused by load changes and reducing safety hazards.

[0047] Furthermore, in order to set up the driving ceramic assembly 1 and the detection ceramic assembly 2, continue as follows: Figure 3 As shown, in this embodiment, the transducer body 3 further includes a rear cover plate 31 and a front cover plate 32 connected in sequence; The driving ceramic assembly 1 is disposed between the rear cover plate 31 and the front cover plate 32; The detection ceramic assembly 2 is located between the rear cover plate 31 and the drive ceramic assembly 1, or between the drive ceramic assembly 1 and the front cover plate 32, or the detection ceramic assembly 2 is located on the front cover plate 32.

[0048] It should be noted that, in this embodiment, the transducer body 3 may include a front cover plate 32 and a rear cover plate 31. The rear cover plate 31 may refer to a mechanical structural component located at the rear of the ultrasonic transducer, which can be used to fix and support the drive ceramic assembly 1. For example, the rear cover plate 31 may be made of a metal material such as stainless steel or aluminum alloy. The front cover plate 32 may refer to a mechanical structural component located at the front of the ultrasonic transducer, which can be connected to the cutter head 4 and used to transmit vibration energy to the cutter head 4. For example, the front cover plate 32 may be made of titanium alloy.

[0049] like Figure 3 As shown, in this embodiment, the rear cover plate 31 and the front cover plate 32 can be sequentially assembled together along the axial direction by threaded connection, bonding or other fixing methods to form an integral structure. The aforementioned driving ceramic assembly 1 can be disposed between the rear cover plate 31 and the front cover plate 32, so that the vibration generated by the driving ceramic assembly 1 can be transmitted along the axial direction to the rear cover plate 31 and the front cover plate 32.

[0050] It should be emphasized that, in this embodiment, the detection ceramic assembly 2 can be composed of one or more piezoelectric ceramic sheets. The aforementioned detection ceramic assembly 2 can be installed on the rear cover plate 31 adjacent to the driving ceramic assembly 1, thereby detecting vibration signals propagating from the direction of the rear cover plate 31; or it can be installed on the driving ceramic assembly 1 adjacent to the front cover plate 32, for detecting vibration signals propagating from the direction of the front cover plate 32; or it can be embedded or attached to the outer surface or interior of the front cover plate 32, for detecting vibration signals at the front cover plate 32.

[0051] Furthermore, considering that if the detection ceramic assembly 2 is placed on the front cover plate 32, since the front cover plate 32 may penetrate human tissue, it needs to be waterproof, which leads to higher cost and more complex manufacturing process; if the detection ceramic assembly 2 is placed between the drive ceramic assembly 1 and the front cover plate 32, since this position is not at a position with large amplitude, it is not convenient for subsequent calculations. Therefore, in this embodiment, it can be as follows: Figure 3 As shown, it can be described using a configuration between the rear cover plate 31 and the drive ceramic assembly 1.

[0052] Furthermore, to avoid mutual interference between the detection ceramic group 2 and the driving ceramic group 1, and to detect situations with large amplitudes, such as... Figure 3 As shown, in this embodiment, the transducer body 3 further includes: a middle cover plate 33; The detection ceramic assembly 2 is located between the rear cover plate 31 and the middle cover plate 33, and the driving ceramic assembly 1 is located between the middle cover plate 33 and the front cover plate 32.

[0053] It is understood that the aforementioned middle cover plate 33 may be an intermediate mechanical structure located inside the transducer body 3, between the rear cover plate 31 and the front cover plate 32, which can be used to separate the detection ceramic group 2 and the driving ceramic group 1 and transfer vibration energy from the driving ceramic group 1 to the front cover plate 32. For example, the middle cover plate 33 may be made of titanium alloy material, etc. This embodiment does not limit this.

[0054] It is also understandable that, since the middle cover plate 33 provides independent installation space for the detection ceramic group 2 and the driving ceramic group 1, it avoids mutual interference between the two ceramic groups. At the same time, the middle cover plate 33, as a vibration transmission medium, can ensure that vibration energy is efficiently transmitted from the driving ceramic group 1 to the front cover plate 32. Furthermore, since the driving ceramic group 1 is located between the middle cover plate 33 and the front cover plate 32, it can be said that the driving ceramic group 1 is clamped between the middle cover plate 33 and the front cover plate 32 inside the transducer body 3 along the vibration propagation direction. Thus, the driving ceramic group 1 can be located at the front of the vibration propagation path, and the vibration it generates can be directly transmitted forward to the front cover plate 32 and the cutter head 4, reducing the loss of vibration energy during the transmission process.

[0055] In a specific implementation, the transducer body 3 of the aforementioned ultrasonic transducer, in addition to the rear cover plate 31 and the front cover plate 32, may also include a middle cover plate 33. Specifically, the rear cover plate 31, the middle cover plate 33, and the front cover plate 32 are arranged sequentially along the vibration propagation direction, with the middle cover plate 33 located between the rear cover plate 31 and the front cover plate 32. The aforementioned detection ceramic assembly 2 is disposed in the space between the rear cover plate 31 and the middle cover plate 33, such that both sides of the detection ceramic assembly 2 are in contact with the rear cover plate 31 and the middle cover plate 33, or are indirectly connected through an intermediate structure. The aforementioned driving ceramic assembly 1 is disposed in the space between the middle cover plate 33 and the front cover plate 32, such that both sides of the driving ceramic assembly 1 are in contact with the middle cover plate 33 and the front cover plate 32, or are indirectly connected through an intermediate structure.

[0056] Furthermore, inside the transducer body 3, the sequence arranged from the rear cover plate 31 to the front cover plate 32 is as follows: rear cover plate 31, detection ceramic assembly 2, middle cover plate 33, drive ceramic assembly 1, and front cover plate 32. When the ultrasonic host outputs a drive signal to the drive ceramic assembly 1, the drive ceramic assembly 1 vibrates. The vibration wave propagates forward through the middle cover plate 33 to the front cover plate 32 and the blade head 4, while simultaneously propagating backward through the middle cover plate 33 and the detection ceramic assembly 2 to the rear cover plate 31. The detection ceramic assembly 2 is located on the vibration propagation path, thus it can deform with the vibration and output a detection signal.

[0057] In this embodiment, during the operation of the ultrasonic transducer, the ultrasonic host collects the current vibration amplitude of the ultrasonic transducer through the detection ceramic group 2 set on the ultrasonic transducer. The detection ceramic group 2 is positioned along the vibration propagation path to sense vibration. Then, the preset target amplitude is compared with the collected current amplitude. Based on the comparison result, the ultrasonic host adjusts the drive signal so that the adjusted drive signal can drive the ultrasonic transducer closer to the preset target amplitude. Finally, the adjusted drive signal is transmitted to the drive ceramic group 1 on the ultrasonic transducer. After receiving the adjusted drive signal, the drive ceramic group 1 vibrates under the action of the drive signal, causing the ultrasonic transducer to vibrate according to the preset target amplitude. Because this embodiment collects the current amplitude in real time through the detection ceramic group 2 set on the vibration propagation path during the operation of the ultrasonic transducer, and performs closed-loop adjustment of the drive signal based on the preset target amplitude and the current amplitude, compared with the existing open-loop drive method, this embodiment can achieve real-time closed-loop control of the ultrasonic transducer amplitude, ensuring that the ultrasonic transducer always vibrates stably according to the preset target amplitude, thereby avoiding amplitude fluctuations caused by load changes and reducing safety hazards.

[0058] Reference Figure 4 , Figure 4 This is a flowchart illustrating the second embodiment of the ultrasonic transducer driving method for real-time amplitude control according to the present application. Based on the first embodiment described above, a second embodiment of the ultrasonic transducer driving method for real-time amplitude control according to the present application is proposed.

[0059] like Figure 4 As shown, considering that the relationship between amplitude and electrical signal varies at different locations, in this embodiment, the step of acquiring the current amplitude of the ultrasonic transducer through the detection ceramic group 2 during the operation of the ultrasonic transducer includes: Step S11: During the operation of the ultrasonic transducer, acquire the detection signal fed back by the detection ceramic group; Step S12: Convert the detection signal through a preset mapping relationship to determine the current amplitude of the ultrasonic transducer.

[0060] It should be noted that the aforementioned detection signal can be an electrical signal generated by the positive piezoelectric effect of the detection ceramic group 2 under mechanical vibration, and the form of this electrical signal can be a charge signal or a voltage signal. The aforementioned preset mapping relationship can refer to a mathematical expression or data lookup table that is pre-established and stored to describe the correspondence between the detection signal and the current amplitude of the ultrasonic transducer. The aforementioned preset mapping relationship can be established in advance through experiments, and this embodiment does not impose any restrictions on it.

[0061] In the specific implementation, firstly, when the ultrasonic transducer vibrates under the action of the driving signal, the driving ceramic assembly 1 is affected by the alternating electric field and undergoes contraction, expansion and deformation. The deformation frequency is consistent with the driving voltage Vd frequency of the driving signal. During the deformation process, the ceramics on both sides of the driving ceramic assembly 1 continuously impact the front cover plate 32 and the middle cover plate 33. The generation wave generated by the impact on the front cover plate 32 is transmitted along the front cover plate 32 to the cutter head 4, thereby driving the cutter head 4 to vibrate.

[0062] Simultaneously, the detection ceramic assembly 2, located along the vibration propagation path, deforms along with the vibration. Based on the piezoelectric effect, the detection ceramic assembly 2 converts the deformation into a detection signal in the form of an electrical signal, and then transmits this detection signal (i.e., Figure 3 The sampling voltage (Vs) is transmitted to the ultrasonic transducer. The ultrasonic transducer receives this detection signal through its internal piezoelectric charge detection module. This module converts the charge signal generated by the detection ceramic group 2 into a voltage signal, performs filtering and analog-to-digital conversion, and obtains a digitized detection signal value. Next, the ultrasonic transducer reads a pre-built preset mapping relationship from its internal memory. This preset mapping relationship describes the correspondence between the detection signal value and the current amplitude of the ultrasonic transducer. The detection signal value can then be used as an input parameter and substituted into the preset mapping relationship. Through mathematical operations or table lookup, the corresponding amplitude value is calculated, thereby determining the current amplitude of the ultrasonic transducer at the current moment.

[0063] Furthermore, in order to establish the above mapping relationship, in this embodiment, one end of the ultrasonic transducer is connected to a blade 4.

[0064] Understandably, the aforementioned blade 4 can refer to a medical device component connected to one end of the ultrasonic transducer, used for direct contact and cutting of bone tissue. This blade 4 is typically made of metal and has a specific geometry to achieve vibration amplification. For example... Figure 3 As shown, in this embodiment, the cutter head 4 can be set on the front cover plate 32. The specific connection relationship can be set according to the actual situation. This embodiment does not limit this.

[0065] Accordingly, before the step of acquiring the detection signal fed back by the detection ceramic group 2 during the operation of the ultrasonic transducer, the method further includes: Step S1101: Establish the first relationship between the deformation of the ceramic detection group and the amplitude of the cutter head.

[0066] It is also understood that the aforementioned deformation can refer to the degree of mechanical deformation of the ceramic assembly 2 under the action of vibration waves, specifically manifested as the relative displacement difference between the two end faces of the ceramic assembly 2. The aforementioned first relationship can refer to an expression describing the mathematical relationship between the deformation of the ceramic assembly 2 and the amplitude of the cutter head 4. For example, if the deformation of the ceramic assembly 2 is denoted as S3_deta and the amplitude of the cutter head 4 is denoted as S1, then the first relationship can be the relationship between S3_deta and S1.

[0067] Step S1102: Establish a second relationship between the detection signal of the ceramic detection group and the deformation of the ceramic detection group; Step S1103: Construct a preset mapping relationship based on the first relation and the second relation.

[0068] It should be understood that the above-mentioned second relation can be an expression describing the mathematical relationship between the detection signal of the detection ceramic group 2 and the deformation of the detection ceramic group 2. For example, if the voltage value corresponding to the detection signal is denoted as Vs, then the second relation can be the relationship between Vs and S3_deta.

[0069] Since both the first and second relational expressions are related to the deformation of the ceramic group 2, the mapping relationship between the amplitude S1 of the cutter head 4 and the voltage value Vs of the detection signal can be constructed based on the first and second relational expressions.

[0070] In practical implementation, before acquiring the detection signal fed back from the ceramic assembly 2, the ultrasonic host needs to establish a preset mapping relationship between the detection signal and the amplitude of the cutting head 4. Specifically, the ultrasonic host can first establish a first relationship between the deformation of the ceramic assembly 2 and the amplitude of the cutting head 4. Then, the ultrasonic host can establish a second relationship between the detection signal of the ceramic assembly 2 and the deformation of the ceramic assembly 2. Finally, a preset mapping relationship is constructed based on the first and second relationships. For ease of explanation later, the mapping relationship between the amplitude S1 of the cutting head 4 and the voltage value Vs of the detection signal can be denoted as Vs=K. S1, where K is a proportionality coefficient. This preset mapping relationship can be stored in the internal memory of the ultrasonic host and used to quickly convert the detection signal into the amplitude value of the cutter head 4 during actual operation.

[0071] Furthermore, in order to obtain the aforementioned first relationship, in this embodiment, the step of establishing the first relationship between the deformation of the detected ceramic group 2 and the amplitude of the cutter head 4 includes: Step S11011: Determine the first vibration displacement and the second vibration displacement of the position of the detection ceramic group, wherein the first vibration displacement is the vibration displacement of the detection ceramic group on the side closer to the cutter head, and the second vibration displacement is the vibration displacement of the detection ceramic group on the side farther away from the cutter head.

[0072] It should be understood that the aforementioned first vibration displacement may refer to the maximum offset distance of the end face of the ceramic assembly 2 near the cutter head 4 relative to the equilibrium position during vibration (i.e., Figure 3 At point B), this displacement direction can be along the vibration propagation direction (i.e., axial direction), and is generally expressed in micrometers (μm). The aforementioned second vibration displacement can refer to the maximum offset distance of the end face of the ceramic assembly 2 away from the cutter head 4 relative to the equilibrium position during vibration (i.e., Figure 3 At point A in the middle), the direction of displacement can also be along the direction of vibration propagation (i.e., the axial direction), and it can generally be expressed in micrometers (μm).

[0073] Therefore, the difference between the first vibration displacement and the second vibration displacement is the deformation of the ceramic group 2. By measuring or calculating the vibration displacement on both sides of the ceramic group 2, the ultrasonic host can accurately obtain the actual compression or tensile deformation of the ceramic group 2 during vibration.

[0074] Step S11012: Establish a third relationship between the first vibration displacement and the amplitude of the cutter head, and establish a fourth relationship between the second vibration displacement and the amplitude of the cutter head.

[0075] It should also be understood that, since the displacement and the amplitude of the cutter head 4 are linearly related in this embodiment, refer to... Figure 5 , Figure 5 This is a displacement diagram of the ultrasonic transducer at various positions in the real-time amplitude control ultrasonic transducer driving method of this application, as shown below. Figure 5 As shown, displacement curves at various positions of the ultrasonic transducer can be obtained in advance, and then the displacement peak points of each segment can be found based on the curves. Figure 5 There may be four displacement peak points in the curve, and then a suitable position can be selected from these displacement peak points to set the detection ceramic group 2.

[0076] In this embodiment, because there is a diameter difference between the front cover plate 32 and the blade head 4, the ultrasonic vibration amplitude increases during the transmission of ultrasound. Position ④ corresponds to the end of the blade head 4 away from the front cover plate 32, and the amplitude here can be denoted as S1. Since cutting is required at this position, it is not convenient to set up the detection ceramic group 2. Position ③ corresponds to the connection between the front cover plate 32 and the blade head 4. Since it needs to penetrate into the skin tissue, there may be blood and saline solution inside, so a waterproof structure is required, which is costly, and therefore it is not convenient to set up the detection ceramic group 2. Position ② is the middle position of the front cover plate 32, and the amplitude here can be denoted as S2. The same reason applies to position ③, so it is not convenient to set up the detection ceramic group 2. Therefore, in this embodiment, the detection ceramic group 2 can be set near position ①. Position ① can be the middle position between the rear cover plate 31 and the middle cover plate 33. The amplitude here can be denoted as S3. However, it should be noted that if the center of the detection ceramic group 2 is directly set at position ①, it will not be conducive to subsequent detection. Therefore, in this embodiment, it can be set within a preset distance to the left or right of position ①. The preset distance can be set according to the actual situation. Figure 5 The embodiment shown here uses a preset distance offset towards the middle cover plate 33 for illustration.

[0077] Furthermore, based on Figure 5 It is not difficult to see that, in this embodiment, if the peak of the ultrasonic wave is used as the reference point, the amplitude amplification ratio towards the blade tip can be S1 / S2. This parameter is determined by the mechanical structure. Once the structure is manufactured, this value is determined. Therefore, the amplitude of the blade tip is only related to the driving voltage Vd. Similarly, when the ultrasonic wave is transmitted towards the rear cover plate 31, it is assumed that the detection ceramic group 2 is located at the peak of the ultrasonic wave (i.e., Figure 5 If we consider position ①, then there exists a magnification factor S3 / S2, which is also a fixed value. Since it's the same S2, we can conclude that once the mechanical structure is determined, the ratio S1 / S3 of the blade tip's amplitude and the amplitude of the detection ceramic group 2 is also a fixed value. This can be written as S3=K. S1 and K are the ratio of the amplitude of the cutting edge to the amplitude of the detection ceramic group 2. When the structure is processed, the value of K is fixed (within the linear range of the inverse piezoelectric effect of the ceramic).

[0078] It should be noted that the third relationship mentioned above can refer to an expression describing the mathematical relationship between the first vibration displacement and the amplitude of the cutter head 4, and this expression can be a linear proportional relationship. The fourth relationship mentioned above can refer to an expression describing the mathematical relationship between the second vibration displacement and the amplitude of the cutter head 4, and this expression can also be a linear proportional relationship.

[0079] For ease of understanding, please refer to Figure 6 , Figure 6 This is a displacement diagram of the ceramic assembly at various positions in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 6 As shown, point A is the side of the ceramic assembly 2 away from the cutter head 4, and point B is the side of the ceramic assembly 2 closer to the cutter head 4. Both points A and B are related to... Figure 3 Consistent with the middle. Furthermore, based on... Figure 6 As can be seen, at the detection position of ceramic group 2, because the ceramic has thickness, the displacements on both sides of the ceramic are different. The displacement at point A can be the second vibration displacement mentioned above, denoted as S3a, and the displacement at point B can be the first vibration position mentioned above, denoted as S3b.

[0080] Therefore, the third relation mentioned above can be S3b=K2 S1, the fourth relation can be S3a=K1 S1. Where K1 is the magnification ratio for detecting the tip of ceramic group 2 away from the cutter head 4, and K2 is the magnification ratio for detecting the tip of ceramic group 2 close to the cutter head 4.

[0081] Step S11013: Based on the third and fourth relational expressions, establish a first relational expression between the deformation of the detection ceramic group 2 and the amplitude of the cutting head.

[0082] Understandably, the aforementioned deformation can refer to the degree of compression or tension deformation of the ceramic assembly 2 caused by the different displacements of its two end faces during vibration, specifically the difference between the second vibration displacement and the first vibration displacement. That is, the deformation of the ceramic assembly 2 is S3_deta = S3a - S3b = K1. S1-K2 S1. K1 and K2 can be obtained through simulation in the early stages of design, and this embodiment does not impose any restrictions on them. Therefore, the first relationship mentioned above can be S3_deta=(K1-K2) S1.

[0083] After obtaining the first relation, refer to Figure 7 , Figure 7 This is a diagram showing the inverse piezoelectric effect relationship of the ceramic group in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 7As shown, there is a certain relationship between the deformation of ceramic group 2 and the voltage, and the area within the dashed box represents the interval with a linear relationship (i.e., Figure 7 The linear interval is defined as follows: Assuming the slope of this linear interval is K3, which can be obtained experimentally, the second relationship between the detection signal of ceramic group 2 and the deformation of ceramic group 2 can be Vs = K3. S3_deta.

[0084] Since the first relation S3_deta=(K1-K2) S1 and the second relation Vs=K3 S3_deta is related to the deformation of the ceramic group 2. Therefore, based on the first and second relationships, the mapping relationship between the amplitude S1 of the cutter head 4 and the voltage value Vs of the detection signal can be constructed, and the mapping relationship can be obtained as Vs=K3. (K1-K2) S1.

[0085] Reference Figure 8 , Figure 8 This is a graph showing the relationship between the sampling voltage and the driving voltage in the real-time amplitude control ultrasonic transducer driving method of this application. Figure 8 As shown, when the mapping relationship is obtained as Vs=K3 (K1-K2) After S1, targeting K3 (K1-K2) can then be denoted as a uniform proportionality coefficient K, i.e., Vs=K S1. K can then acquire the detection signal (i.e. Figure 8 The amplitude of the intermediate recovery voltage Vs and the cutter head 4 (i.e., the voltage Vs) and the amplitude of the cutter head 4 Figure 8 The amplitude S1 of the cutting head 4 was obtained through simulation. When the mapping relationship is obtained as Vs=K... After S1, Vs can be substituted into this mapping relationship during use to obtain the current amplitude of the cutter head 4 (i.e., Figure 3 The amplitude calculation module calculates the current amplitude and transmits it to the processor for subsequent adjustment operations.

[0086] Continue as Figure 3As shown, after obtaining the current amplitude, the amplitude calculation module transmits the calculated current amplitude to the processor. Upon receiving the current amplitude, the processor uses it as the feedback quantity for the closed-loop feedback control system. The processor obtains a preset target amplitude (e.g., the target amplitude value corresponding to the user-selected gear), calculates the amplitude difference between the preset target amplitude and the current amplitude, and uses this amplitude difference as the input parameter of the control algorithm. It then calculates the output power setpoint using a proportional-integral-derivative (PID) control algorithm or a proportional-integral (PI) control algorithm, and adjusts the parameters of the drive signal according to this output power setpoint, thereby achieving closed-loop control of the ultrasonic transducer amplitude.

[0087] Reference Figure 9 , Figure 9 This is a flowchart illustrating the third embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application. Based on the above embodiments, a third embodiment of the ultrasonic transducer driving method for real-time amplitude control according to this application is proposed.

[0088] To achieve constant amplitude control, such as Figure 9 As shown, in this embodiment, the steps of adjusting the driving signal based on the preset target amplitude and the current amplitude, and transmitting the adjusted driving signal to the driving ceramic assembly 1 so that the ultrasonic transducer vibrates according to the preset target amplitude, include: Step S21: Determine the amplitude difference between the preset target amplitude and the current amplitude.

[0089] It should be noted that the above amplitude difference can refer to the algebraic difference between the preset target amplitude and the current amplitude. The calculation method is to subtract the current amplitude from the preset target amplitude. The difference can be positive, negative or zero.

[0090] Reference Figure 10 and Figure 11 , Figure 10 This is a flowchart illustrating the constant amplitude control and constant frequency control in the ultrasonic transducer driving method for real-time amplitude control in this application. Figure 11 This is a flowchart of the constant amplitude control process in the ultrasonic transducer driving method for real-time amplitude control in this application.

[0091] In its implementation, the aforementioned ultrasound host can read the preset target amplitude value corresponding to the user-selected setting from its internal memory, and simultaneously obtain the current amplitude value transmitted from the amplitude calculation module (i.e., Figure 10 Mid-cycle amplitude, that is Figure 11 The amplitude measurement value output by the amplitude calculation module can then be used to determine the preset target amplitude (i.e., Figure 10 The expected amplitude, that is Figure 11 The amplitude difference between the set amplitude value and the current amplitude (i.e., the amplitude difference between the set amplitude value and the current amplitude) Figure 10 Subtraction, that is Figure 11(Amplitude error). If the preset target amplitude is greater than the current amplitude, the amplitude difference is positive, indicating that the energy of the drive signal needs to be increased to increase the amplitude of the cutter head 4; if the preset target amplitude is less than the current amplitude, the amplitude difference is negative, indicating that the energy of the drive signal needs to be decreased to reduce the amplitude of the cutter head 4; if the preset target amplitude is equal to the current amplitude, the amplitude difference is zero, indicating that no adjustment is needed.

[0092] Step S22: Determine the output power setting value based on the amplitude difference; Step S23: Adjust the driving voltage amplitude of the driving signal based on the output power setting value; Understandably, the aforementioned output power setting value can refer to the command value calculated by the ultrasonic host based on the amplitude difference, used to control the output energy of the power amplification module. This value determines the voltage amplitude of the drive signal. The aforementioned drive voltage amplitude can refer to the peak voltage in the sine wave waveform of the drive signal. This amplitude determines the electrical energy intensity obtained by the drive ceramic assembly 1, thereby affecting the vibration amplitude of the cutter head 4.

[0093] In practical use, the ultrasound host can determine the output power setting value based on the amplitude difference. Specifically, the ultrasound host can send the amplitude difference as an input parameter to the processor (i.e., Figure 3 Mid-processor, Figure 10 CPU and Figure 11 The proportional-integral-derivative (PI) control algorithm or proportional-integral (PI) control algorithm runs in the PI controller. This control algorithm can calculate and output an output power setpoint according to the magnitude and trend of the amplitude difference and preset proportional coefficient, integral coefficient and derivative coefficient. The magnitude of the output power setpoint is positively correlated with the absolute value of the amplitude difference, that is, the larger the absolute value of the amplitude difference, the greater the deviation between the output power setpoint and the current power value.

[0094] Subsequently, the ultrasound host can adjust the driving voltage amplitude of the drive signal based on the output power setting. That is, the processor can transmit the calculated output power setting to the power regulator. The power regulator can convert this output power setting into an analog or digital control signal that the power amplifier module can recognize. The power amplifier module then adjusts the driving voltage amplitude at its output terminal according to the received control signal. Specifically, if the output power setting increases, the power amplifier module can increase the driving voltage amplitude; if the output power setting decreases, the power amplifier module can decrease the driving voltage amplitude.

[0095] Step S24: Generate an adjusted drive signal based on the adjusted drive voltage amplitude, and transmit the adjusted drive signal to the drive ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0096] Finally, the ultrasonic host can generate an adjusted drive signal based on the adjusted drive voltage amplitude and transmit the adjusted drive signal to the drive ceramic assembly 1. Specifically, the sine wave generator can receive the frequency setting value sent by the processor and generate a sine wave signal with a specified frequency and a reference amplitude. The power amplification module can receive the sine wave signal output by the sine wave generator and the power control signal output by the power regulator. It can amplify the sine wave signal according to the amplification factor indicated by the power control signal to generate a high-power sine wave drive signal with the adjusted drive voltage amplitude. The ultrasonic host then transmits the adjusted drive signal to the drive ceramic assembly 1 through a signal line. After receiving the adjusted drive signal, the drive ceramic assembly 1 generates mechanical vibration of corresponding intensity according to the voltage amplitude of the drive signal, thereby driving the cutter head 4 to vibrate according to the preset target amplitude.

[0097] Furthermore, in order to achieve constant frequency control, in this embodiment, the method further includes: Step S30: Obtain the driving voltage and driving current of the driving signal, and determine the current phase difference between the driving voltage and the driving current.

[0098] It should be understood that the aforementioned driving voltage can refer to the voltage signal output by the ultrasonic host to both ends of the driving ceramic assembly 1. This voltage signal can be in the form of a sine wave, with a specific frequency and amplitude. The aforementioned driving current can be the current signal output by the ultrasonic host to the driving ceramic assembly 1. This current signal can also be in the form of a sine wave, having the same frequency as the driving voltage but possibly with a phase difference.

[0099] It should also be understood that the aforementioned current phase difference may refer to the phase angle difference between the drive voltage waveform and the drive current waveform.

[0100] In its implementation, the aforementioned ultrasonic transducer performs both amplitude control and frequency tuning to ensure the ultrasonic transducer operates in a resonant state, achieving high-efficiency electroacoustic conversion. (Refer to...) Figure 12 , Figure 12 This is a flowchart of the constant frequency control process in the ultrasonic transducer driving method for real-time amplitude control in this application.

[0101] like Figure 10 as well as Figure 12 Specifically, the ultrasound host can first acquire the driving voltage and driving current of the driving signal (i.e., Figure 10 The current and voltage of the mining circuit are used to determine the current phase difference between the driving voltage and the driving current. Figure 12 (Calculation of phase difference between current and voltage).

[0102] The voltage and current acquisition module inside the ultrasonic transducer is connected to the output of the power amplifier module. This module uses a high-speed analog-to-digital conversion isolation sampling method to acquire the driving voltage signal applied to both ends of the ultrasonic transducer and the driving current signal flowing through the driving ceramic assembly 1 in real time. The module then analyzes and calculates the acquired driving voltage and current waveforms, extracting the phase angles of the driving voltage and current. Subtracting the driving current phase angle from the driving voltage phase angle yields the current phase difference between the driving voltage and current. This current phase difference reflects the current operating state of the ultrasonic transducer: when the current phase difference is zero degrees, it indicates that the transducer is operating at its resonant frequency, with the highest electroacoustic conversion efficiency; when the current phase difference is positive, it indicates that the driving voltage phase leads the driving current phase, and the transducer is operating in the inductive region; when the current phase difference is negative, it indicates that the driving voltage phase lags behind the driving current phase, and the transducer is operating in the capacitive region.

[0103] Step S40: Determine the phase difference value between the current phase difference and the preset phase difference, and determine the target frequency setting value of the driving signal based on the phase difference value.

[0104] It should also be understood that the aforementioned preset phase difference can be a pre-set target phase difference value, which can be set to zero degrees (i.e., the resonant point), or set to other angles according to the actual application scenario to balance efficiency and control stability. The aforementioned target frequency setting value can be a drive signal frequency value calculated based on the phase difference value, used to adjust the current phase difference to the preset phase difference, and this value can be used as an input parameter of the sine wave generator.

[0105] In practical use, the processor of the ultrasound host can read the preset phase difference from the internal memory, subtract the preset phase difference from the current phase difference, and obtain the phase difference value. If the phase difference value is positive, it indicates that the current frequency is lower than the resonant frequency, and the drive signal frequency needs to be increased; if the phase difference value is negative, it indicates that the current frequency is higher than the resonant frequency, and the drive signal frequency needs to be decreased; if the phase difference value is zero, it indicates that the current frequency is the target frequency, and no adjustment is required.

[0106] The processor can then use the phase difference as an input parameter to feed into the proportional-integral-derivative (PID) control algorithm or the proportional-integral (PI) control algorithm (i.e., ...). Figure 12 The frequency setpoint is determined based on the phase error. The control algorithm calculates the target frequency setpoint based on the magnitude and trend of the phase difference.

[0107] Step S50: Adjust the frequency of the drive signal to the target frequency setting value to generate the adjusted drive signal; Step S60: Transmit the adjusted drive signal to the drive ceramic assembly so that the drive ceramic assembly vibrates in a resonant state according to the preset target amplitude.

[0108] In practical use, the ultrasonic host's processor sends the calculated target frequency setting to the sine wave generator. The sine wave generator adjusts the frequency of its output sine wave signal according to the received target frequency setting, ensuring it matches the target frequency setting. Then, the sine wave generator outputs a sine wave signal with the target frequency setting and a reference amplitude to the power amplification module. The power amplification module amplifies this sine wave signal, generating a high-power drive signal with the adjusted frequency. Finally, the ultrasonic host transmits the adjusted drive signal to the drive ceramic assembly 1, causing it to vibrate in resonance according to the preset target amplitude.

[0109] Furthermore, this application also proposes a storage medium storing an ultrasonic transducer driver program for real-time amplitude control. When the ultrasonic transducer driver program for real-time amplitude control is executed by a processor, it implements the steps of the ultrasonic transducer driving method for real-time amplitude control as described above.

[0110] Furthermore, this application also proposes an ultrasonic transducer for real-time amplitude control, the ultrasonic transducer comprising: a driving ceramic assembly 1, a detection ceramic assembly 2, and a transducer body 3; The driving ceramic assembly 1 and the detection ceramic assembly 2 are disposed on the transducer body 3; The driving ceramic group 1 is used to generate vibration under the action of the driving signal to make the ultrasonic transducer vibrate, and the detection ceramic group 2 is disposed on the vibration propagation path of the ultrasonic transducer. The ultrasonic transducer is connected to the ultrasonic host. The ultrasonic host is used to collect the current amplitude of the ultrasonic transducer through the detection ceramic group 2 during the operation of the ultrasonic transducer; adjust the driving signal based on the preset target amplitude and the current amplitude; and transmit the adjusted driving signal to the driving ceramic group 1 so that the ultrasonic transducer vibrates according to the preset target amplitude.

[0111] Furthermore, the transducer body 3 also includes a rear cover plate 31 and a front cover plate 32 connected in sequence; The driving ceramic assembly 1 is disposed between the rear cover plate 31 and the front cover plate 32; The detection ceramic assembly 2 is located between the rear cover plate 31 and the drive ceramic assembly 1, or between the drive ceramic assembly 1 and the front cover plate 32, or the detection ceramic assembly 2 is located on the front cover plate 32.

[0112] Furthermore, the transducer body 3 also includes: a middle cover plate 33; The detection ceramic assembly 2 is located between the rear cover plate 31 and the middle cover plate 33, and the driving ceramic assembly 1 is located between the middle cover plate 33 and the front cover plate 32.

[0113] Other embodiments or specific implementations of the ultrasonic transducer with real-time amplitude control described in this application can be found in the above-described method embodiments, and will not be repeated here.

[0114] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0115] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0116] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory image (ROM) / random access memory (RAM), magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0117] The above are merely preferred embodiments of this application and do 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 method for driving an ultrasonic transducer with real-time amplitude control, characterized in that, The method is applied to an ultrasonic host, which is connected to an ultrasonic transducer. The ultrasonic transducer is provided with a driving ceramic group and a detection ceramic group. The driving ceramic group is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate. The detection ceramic group is arranged on the vibration propagation path of the ultrasonic transducer. The method includes: During the operation of the ultrasonic transducer, the current amplitude of the ultrasonic transducer is collected by the detection ceramic group; The driving signal is adjusted based on the preset target amplitude and the current amplitude, and the adjusted driving signal is transmitted to the driving ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

2. The method as described in claim 1, characterized in that, The step of acquiring the current amplitude of the ultrasonic transducer through the detection ceramic group during the operation of the ultrasonic transducer includes: During the operation of the ultrasonic transducer, the detection signal fed back by the detection ceramic group is acquired; The detection signal is converted by a preset mapping relationship to determine the current amplitude of the ultrasonic transducer.

3. The method as described in claim 2, characterized in that, One end of the ultrasonic transducer is connected to a blade; Before the step of acquiring the detection signal fed back by the detection ceramic assembly during the operation of the ultrasonic transducer, the method further includes: Establish a first relationship between the deformation of the ceramic detection assembly and the amplitude of the cutting head; Establish a second relationship between the detection signal of the ceramic detection group and the deformation of the ceramic detection group; A preset mapping relationship is constructed based on the first relation and the second relation.

4. The method as described in claim 3, characterized in that, The step of establishing the first relationship between the deformation of the ceramic assembly and the amplitude of the cutting head includes: Determine the first vibration displacement and the second vibration displacement of the detection ceramic group at its location. The first vibration displacement is the vibration displacement of the detection ceramic group on the side closer to the cutter head, and the second vibration displacement is the vibration displacement of the detection ceramic group on the side farther away from the cutter head. A third relationship is established between the first vibration displacement and the amplitude of the cutter head, and a fourth relationship is established between the second vibration displacement and the amplitude of the cutter head; Based on the third and fourth relations, a first relation is established between the deformation of the detected ceramic group and the amplitude of the cutter head.

5. The method as described in claim 1, characterized in that, The step of adjusting the driving signal based on a preset target amplitude and the current amplitude, and transmitting the adjusted driving signal to the driving ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude, includes: Determine the amplitude difference between the preset target amplitude and the current amplitude; The output power setting value is determined based on the amplitude difference. The driving voltage amplitude of the driving signal is adjusted based on the output power setting value; An adjusted drive signal is generated based on the adjusted drive voltage amplitude, and the adjusted drive signal is transmitted to the drive ceramic assembly so that the ultrasonic transducer vibrates according to the preset target amplitude.

6. The method as described in claim 1, characterized in that, The method further includes: Acquire the driving voltage and driving current of the driving signal, and determine the current phase difference between the driving voltage and the driving current; Determine the phase difference value between the current phase difference and the preset phase difference, and determine the target frequency setting value of the driving signal based on the phase difference value; The frequency of the drive signal is adjusted to the target frequency setting value to generate the adjusted drive signal; The adjusted driving signal is transmitted to the driving ceramic assembly so that the driving ceramic assembly vibrates in a resonant state according to the preset target amplitude.

7. An ultrasonic main unit, characterized in that, The ultrasound host includes: a memory, a processor, and a driver stored in the memory and executable on the processor, wherein the driver, when executed by the processor, implements the steps of the driving method as described in any one of claims 1 to 6.

8. An ultrasonic transducer with real-time amplitude control, characterized in that, The ultrasonic transducer includes: a driving ceramic assembly, a detection ceramic assembly, and a transducer body; The driving ceramic assembly and the detection ceramic assembly are disposed on the transducer body; The driving ceramic assembly is used to generate vibration under the action of a driving signal to make the ultrasonic transducer vibrate, and the detection ceramic assembly is disposed on the vibration propagation path of the ultrasonic transducer. The ultrasonic transducer is connected to the ultrasonic host. The ultrasonic host is used to collect the current amplitude of the ultrasonic transducer through the detection ceramic group during the operation of the ultrasonic transducer; adjust the driving signal based on the preset target amplitude and the current amplitude; and transmit the adjusted driving signal to the driving ceramic group so that the ultrasonic transducer vibrates according to the preset target amplitude.

9. The ultrasonic transducer as described in claim 8, characterized in that, The transducer body also includes a rear cover plate and a front cover plate connected in sequence; The drive ceramic assembly is located between the rear cover plate and the front cover plate; The detection ceramic assembly is located between the rear cover and the drive ceramic assembly, or between the drive ceramic assembly and the front cover, or the detection ceramic assembly is located on the front cover.

10. The ultrasonic transducer as described in claim 9, characterized in that, The transducer body also includes: a middle cover plate; The detection ceramic assembly is located between the rear cover plate and the middle cover plate, and the driving ceramic assembly is located between the middle cover plate and the front cover plate.

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