A method and device for adjusting resonance frequency based on frequency region

Abstract

The present invention discloses a method and device for adjusting resonant frequency based on frequency regions. The method includes: obtaining an operating frequency range of an ultrasonic scalpel head, and obtaining an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range; dividing the operating frequency range into regions according to characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain multiple different frequency regions; obtaining the phase difference value and the impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and the impedance value according to preset rules, and determining the target frequency region where the current operating frequency is located in multiple different frequency regions; determining a corresponding adjustment strategy based on the target frequency region, and adjusting the current operating frequency according to the adjustment strategy until the resonant frequency corresponding to the current ultrasonic scalpel head after replacement is reached. The present invention solves the problem of inaccurate resonant frequency adjustment after replacing the scalpel head in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic scalpel equipment, and in particular to a method and device for adjusting a resonant frequency based on a frequency region. Background Art

[0002] Ultrasonic soft tissue cutting and hemostasis devices (abbreviated as ultrasonic scalpels) convert electrical energy into mechanical energy, using the vibration energy generated by the ultrasonic transducer to drive the blade's high-frequency mechanical vibrations. These devices are commonly used in surgical procedures. To achieve efficient cutting and hemostasis, the vibration frequency of the ultrasonic scalpel tip must be adjusted in real time to maintain a constant resonant state. However, in practice, doctors often forget to perform a resonant frequency self-check after replacing the blade tip, resulting in a failure to meet surgical requirements.

[0003] To avoid this, some existing technologies force users to perform a no-load self-test after replacing the blade. These include adding hardware to detect the blade connection status or using software to identify the connection, and extending the periodic frequency sweep time or frequency, but this can affect the life of the ultrasonic transducer.

[0004] Therefore, a method has emerged to ensure the resonant state by locking the zero phase difference between the voltage and current. However, the frequency range of the method to ensure the resonant state is simply identified by the phase difference as the only determining factor. Since some resonant frequency regions will change in real time with the change of impedance and the aging of the blade circuit, the points where the phase difference is zero or close to zero will also fluctuate. Therefore, there is uncertainty in the judgment method using a simple phase difference value, which leads to the problem of inaccurate resonant frequency adjustment. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method and device for adjusting the resonant frequency based on the frequency region, aiming to solve the problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment after replacing the scalpel head in the prior art.

[0006] The embodiment of the present invention is implemented as follows:

[0007] A method for adjusting a resonant frequency based on a frequency region, the method comprising:

[0008] Obtaining an operating frequency range of an ultrasonic scalpel head, and obtaining an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range;

[0009] Dividing the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions;

[0010] Obtaining a phase difference value and an impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and the impedance value according to a preset rule, and determining a target frequency region in which a current operating frequency is located within the multiple different frequency regions, wherein the current operating frequency is the previous resonant frequency before the scalpel head was replaced;

[0011] A corresponding adjustment strategy is determined according to the target frequency region, and the current operating frequency is adjusted according to the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached.

[0012] Furthermore, in the above-mentioned resonant frequency adjustment method based on frequency regions, the step of dividing the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions includes:

[0013] The operating frequency range corresponding to the phase difference being zero and the impedance value being minimum and maximum is divided into a resonant frequency region and an anti-resonant frequency region respectively;

[0014] The portion of the operating frequency interval where the phase difference is negative and the impedance value is greater than the minimum impedance value but less than the first preset impedance value is divided into a first normal frequency tracking state region;

[0015] The portion of the operating frequency interval corresponding to a positive phase difference and an impedance value greater than a minimum impedance value and less than a maximum impedance value is divided into a second normal frequency tracking state region;

[0016] The part of the operating frequency interval where the phase difference is negative and the impedance value is less than the maximum impedance value but greater than the second preset impedance value is divided into an anti-resonance processing state area;

[0017] Wherein, the first preset impedance value is greater than the second preset impedance value.

[0018] Furthermore, in the above-mentioned resonant frequency adjustment method based on frequency regions, the steps of obtaining the phase difference value and impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and impedance value according to a preset rule, and determining the target frequency region in which the current operating frequency is located in the multiple different frequency regions include:

[0019] comparing the absolute value of the phase difference with a first threshold;

[0020] When the absolute value of the phase difference is less than the first threshold, comparing the absolute value of the difference between the impedance value and the second threshold, and the absolute value of the difference between the impedance value and the third threshold, with a fifth threshold;

[0021] If the absolute value of the difference between the impedance value and the second threshold value is smaller than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is larger than the fifth threshold value, it is determined that the current operating frequency is in the resonant frequency region;

[0022] If the absolute value of the difference between the impedance value and the second threshold is greater than the fifth threshold, and the absolute value of the difference between the impedance value and the third threshold is not greater than the fifth threshold, it is determined that the current operating frequency is in the resonant frequency range and in the anti-resonant frequency region;

[0023] When the absolute value of the phase difference is greater than or equal to the first threshold, determining whether the phase difference is a positive number, and if the phase difference is a positive number, determining that the current operating frequency is in the second normal frequency tracking state range;

[0024] If the phase difference is a negative number, it is determined that the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold.

[0025] Furthermore, in the above-mentioned method for adjusting the resonant frequency based on the frequency region, the step of determining whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold value includes:

[0026] When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero;

[0027] Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero;

[0028] It is determined that the current operating frequency is in the first normal frequency tracking state area.

[0029] Furthermore, in the above-mentioned method for adjusting the resonant frequency based on the frequency region, the step of determining whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold value further includes:

[0030] When the impedance value is greater than a fourth threshold, it is determined that the current operating frequency is in the anti-resonance processing state region;

[0031] When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero;

[0032] Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero;

[0033] It is determined that the current operating frequency is in the anti-resonance processing state area.

[0034] Furthermore, in the above-mentioned resonant frequency adjustment method based on frequency region, the steps of determining a corresponding adjustment strategy according to the target frequency region, and adjusting the current operating frequency by the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached include:

[0035] When the target frequency region where the current operating frequency is located is a resonant frequency region, performing frequency tracking on the current operating frequency using a preset frequency tracking algorithm to obtain the resonant frequency / using the current operating frequency as the resonant frequency;

[0036] When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, the difference between the current operating frequency and the first preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the second normal frequency tracking state region;

[0037] The next operating frequency is adjusted using the preset frequency tracking algorithm until the next operating frequency is within the resonant frequency region, and the next operating frequency is output as the resonant frequency;

[0038] When the target frequency region where the current operating frequency is located is a second normal frequency tracking state region, adjusting the current operating frequency using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and outputting the next operating frequency as the resonant frequency;

[0039] When the target frequency region where the current operating frequency is located is an anti-resonance processing state region, outputting a next operating frequency using a difference between the current operating frequency and a third preset fixed adjustment frequency until the next operating frequency is located in the anti-resonance frequency region, and then adjusting the next operating frequency according to an adjustment strategy for the anti-resonance frequency region;

[0040] When the target frequency region where the current operating frequency is located is a first normal frequency tracking state region, the current operating frequency is adjusted using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0041] Furthermore, in the above-mentioned method for adjusting the resonant frequency based on the frequency region, the mathematical expression of the preset frequency tracking algorithm is:

[0042] f1=f+Δf;

[0043] Δf=-K*θ;

[0044] Wherein, K is a positive number, θ is the phase difference corresponding to the current operating frequency, f is the current operating frequency, and f1 is the adjusted operating frequency, i.e., the next operating frequency.

[0045] Another object of the present invention is to provide a resonant frequency adjustment device based on frequency regions, the device comprising:

[0046] An acquisition module, configured to acquire an operating frequency range of an ultrasonic scalpel head, and acquire an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range;

[0047] A division module, configured to divide the operating frequency range into regions according to characteristic values ​​reflected by the impedance curve and the phase difference curve, to obtain a plurality of different frequency regions;

[0048] a comparison module, configured to obtain a phase difference value and an impedance value of the current ultrasonic scalpel head after replacement, compare the phase difference value and the impedance value according to a preset rule, and determine a target frequency region in which the current operating frequency is located within the plurality of different frequency regions, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced;

[0049] The adjustment module is used to determine a corresponding adjustment strategy according to the target frequency region, and adjust the current operating frequency according to the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached.

[0050] Another object of the present invention is to provide a readable storage medium having a computer program stored thereon, wherein the program implements the steps of the above method when executed by a processor.

[0051] Another object of the present invention is to provide an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the program.

[0052] Compared with the existing technology, the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head within the operating frequency range, and comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and phase difference curve to divide the operating frequency range into regions, ensuring the accuracy of the regional division. In addition, the two factors of impedance and phase difference are comprehensively considered to determine the region in which the operating frequency is located. The corresponding different frequency adjustment methods in different frequency regions are used to achieve automatic adjustment of the resonant frequency, avoiding the inaccuracy of using phase difference as the only determining factor for identification. This solves the problem of inaccurate resonant frequency adjustment after the blade head is replaced in the existing ultrasonic scalpel equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A flow chart of a method for adjusting a resonant frequency based on frequency regions provided in a first embodiment of the present invention;

[0054] Figure 2 Schematic diagram of region division in a method for adjusting a resonant frequency based on frequency regions in one embodiment of the present invention;

[0055] Figure 3 Schematic diagram of the structure of a frequency control system in a method for adjusting a resonant frequency based on frequency regions in one embodiment of the present invention;

[0056] Figure 4 FIG. 4 is a structural block diagram of a resonant frequency adjustment device based on frequency regions in a third embodiment of the present invention.

[0057] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0058] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0059] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] Any of the following embodiments of the present invention can be applied in the following scenarios, specifically: an ultrasonic soft tissue cutting and hemostasis device (referred to as an ultrasonic knife device) is a surgical instrument that converts electrical energy into mechanical energy and uses the vibration energy generated by an ultrasonic transducer to drive the knife rod to perform high-frequency mechanical vibration, thereby tearing biological tissue cells or cutting biological soft tissue to meet clinical needs.

[0062] In order to ensure the cutting efficiency and hemostatic effect of the ultrasonic scalpel device, it is necessary to adjust the vibration frequency of the ultrasonic scalpel head in real time to always be in a resonant state. Therefore, in the existing technology, after turning on the ultrasonic scalpel device host, the doctor needs to perform a no-load frequency sweep self-test on the resonant frequency of the ultrasonic scalpel head to obtain the resonant frequency to ensure that it meets the basic operating requirements of subsequent operations, that is, the ultrasonic scalpel device meets the requirements of clinical operations.

[0063] But in fact, an operation may need to use more than one ultrasonic scalpel head. When the doctor replaces the ultrasonic scalpel head, he sometimes forgets to perform a no-load frequency sweep self-test on the resonant frequency of the replaced ultrasonic scalpel head, so that the current output working frequency of the ultrasonic scalpel device host, that is, the working frequency that was in the resonant state last time, is very likely to be unable to meet the resonance state of the replaced ultrasonic scalpel head (because the natural frequency of each blade has certain differences, resulting in the frequency of the resonant state is not exactly the same). In particular, when the current working frequency of the ultrasonic scalpel device host is in the anti-resonance frequency range of the replaced ultrasonic scalpel head or is far away from the anti-resonance frequency range, the use of existing frequency tracking methods will cause the current working frequency to deviate more and more from the vicinity of the resonant frequency, thereby causing the ultrasonic scalpel device host to fail to work normally. This prompts the host of the ultrasonic scalpel device to frequently issue error prompts, reminding doctors to avoid clinical accidents caused by illegal operations. Therefore, in order to prevent users from not performing no-load frequency sweep self-test after replacing the scalpel, the existing technology forces users to perform no-load frequency sweep self-test when a new blade head is detected or the blade head is connected for the second time. Otherwise, the ultrasonic scalpel device cannot be used normally. In order to achieve the above-mentioned forced execution means, either hardware is added to increase the cost to detect or identify the connection status of the blade head and the ultrasonic transducer, or the software processing program is improved to extend the duration or number of continuous periodic frequency sweeps and use the spectrum to identify whether the blade head is connected. However, since the periodic frequency sweep requires the ultrasonic scalpel device to remain in standby state to identify whether the blade head is connected, the ultrasonic transducer needs to continuously output for a long time, thereby affecting the normal service life of the ultrasonic transducer.

[0064] In the prior art, there is a method to solve the above problem by locking the zero phase difference between voltage and current to ensure the resonant state. However, the frequency range of the method to ensure the resonant state is simply identified by phase difference as the only determining factor. Since some resonant frequency areas will change in real time with the influence of impedance changes and aging of the blade circuit, the points where the phase difference is zero or close to zero will also fluctuate. Therefore, there is uncertainty in the judgment method of using a simple phase difference value, which leads to the problem of inaccurate resonant frequency adjustment.

[0065] To this end, an embodiment of the present invention provides a resonant frequency adjustment method based on frequency regions, the purpose of which is to simultaneously obtain the impedance curve and phase difference curve of the ultrasonic knife head in the working frequency range, comprehensively consider the characteristic values ​​of impedance and phase difference shown by the impedance curve and phase difference curve to divide the working frequency range into regions, ensure the accuracy of the regional division, and comprehensively consider the two factors of impedance and phase difference to determine the region where the working frequency is located. Technical means to solve the above-mentioned problem of using phase difference value as the only determination factor for identification.

[0066] The following will describe in detail how to improve the accuracy of resonant frequency adjustment of an ultrasonic scalpel device after replacing the scalpel head, with reference to specific embodiments and accompanying drawings.

[0067] Example 1

[0068] See also Figure 1 , which shows a resonant frequency adjustment method based on frequency regions in a first embodiment of the present invention, and the method includes steps S10 to S13.

[0069] Step S10: obtaining an operating frequency range of an ultrasonic scalpel head, and obtaining an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range.

[0070] Among them, the operating frequency of the ultrasonic scalpel head is based on the natural frequency of each ultrasonic scalpel head when it is produced. As long as it is within this range, the produced scalpel heads meet the requirements. Although the specific parameter values ​​such as resonant frequency, resonant impedance, anti-resonant frequency, and anti-resonant impedance are not exactly the same among different ultrasonic scalpels, their frequency, impedance, and phase difference curves are similar. Specifically, an existing impedance analyzer can be used to test the scalpel head system composed of an ultrasonic scalpel handle, an ultrasonic transducer, an amplitude transformer, a scalpel rod, and a scalpel rod sleeve, so as to obtain the curve relationship between frequency, impedance, and phase difference. For example, Figure 2 As shown in the figure, the horizontal axis represents the frequency F, and the vertical axis represents the impedance Z and the phase difference P, respectively. The impedance adopts the logarithmic coordinate LogZ, and the phase difference is the phase difference between the driving voltage and current of the ultrasonic transducer.

[0071] Step S11 , dividing the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions.

[0072] Among them, according to the characteristic values ​​shown by the impedance curve and the phase difference curve, the operating frequency range can be divided into multiple different frequency regions, specifically, Figure 2 As shown, point O and point E are the minimum and maximum values ​​of the working frequency of the ultrasonic scalpel head respectively. Each ultrasonic scalpel has five curve areas, namely OC segment, C area, CD segment, D area and DE segment, within the working frequency range. The curve area is a plurality of different frequency areas, more specifically, mainly including the resonant frequency area, the anti-resonant frequency area, the first normal frequency chasing state area, the second normal frequency chasing state area and the anti-resonant processing state area. The resonant frequency area is characterized by a phase difference of 0 and a minimum impedance value (point A in the figure); the anti-resonant frequency area is a phase difference of 0 and a maximum impedance value (point B in the figure); the first normal frequency chasing state area (OC area) is a negative phase difference, and the impedance value is between the minimum and maximum impedance values, and is actually in a small interval between the minimum and maximum impedance values ​​close to the minimum value. Specifically, the impedance value is greater than the minimum impedance value but less than the first preset impedance value, wherein the first preset impedance threshold value can be set according to actual conditions; In the normal frequency tracking state area (CD area), the phase difference is positive, and the impedance value is greater than the minimum value and less than the maximum value; in the anti-resonance processing state area (DE area), the phase difference is negative, and the impedance value is also between the minimum and maximum impedance values, and is actually in a small interval between the minimum and maximum impedance values ​​close to the maximum value. Specifically, the impedance value is less than the maximum impedance value but greater than the second preset impedance value, wherein the second preset impedance threshold can be set according to actual conditions; and the first preset impedance value is greater than the second preset impedance value. It should be noted that the resonant frequency area of ​​the ultrasonic scalpel head changes, but the range of its change will not be too large. Although point C is shown in the figure, it is actually a very small interval. The anti-resonance frequency area of ​​the ultrasonic scalpel head is similar to the resonant frequency area in nature. Although point D is shown in the figure, it is actually a very small interval. There is a certain overlapping area in the impedance values ​​of the DE and OC areas.

[0073] Step S12, obtain the phase difference value and impedance value of the current ultrasonic scalpel head after replacement, compare the phase difference value and impedance value according to preset rules, and determine the target frequency area where the current operating frequency is located in the multiple different frequency areas, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced.

[0074] Among them, according to the phase value and impedance value of the replaced cutter head, it is possible to identify in which frequency region the current operating frequency is located under the new cutter head, and adopt different frequency adjustment methods for the corresponding frequency regions to realize automatic tracking of the resonant frequency. Specifically, the current operating frequency is the last resonant frequency before the cutter head was replaced, and based on the collected current value and voltage value fed back by the current cutter head, the corresponding phase difference value and impedance value can be calculated respectively.

[0075] It can be understood that by introducing the impedance value to divide and determine the area, the problem of inaccurate area determination caused by determining the area only by the phase difference can be avoided.

[0076] Step S13: determining a corresponding adjustment strategy according to the target frequency region, and adjusting the current operating frequency by the adjustment strategy until the resonant frequency corresponding to the replaced ultrasonic scalpel head is reached.

[0077] Among them, matching different frequency adjustment processing methods to adjust the current working frequency can achieve frequency tracking and resonant state of the current working frequency without forced frequency sweep self-test after the user replaces the new cutter head.

[0078] Specifically, the above functions or methods can be implemented based on a frequency control system, such as Figure 3 As shown, the control system includes an MCU processor, a frequency adjustment unit, a power drive unit, a current acquisition unit, a voltage acquisition unit, a phase processing unit, an ultrasonic scalpel transducer, and an ultrasonic scalpel head detachably connected to the ultrasonic scalpel transducer;

[0079] Among them, the current acquisition unit is connected to the ultrasonic knife transducer for obtaining the current current value of the knife head; the voltage acquisition unit is connected to the ultrasonic knife transducer for obtaining the current voltage value of the knife head; the phase processing unit is connected to the current acquisition unit and the voltage acquisition unit for receiving the current current value and the current voltage value, and obtaining the phase difference value based on the current current value and the current voltage value; the MCU processor is connected to the current acquisition unit, the voltage acquisition unit and the phase processing unit, and calculates the corresponding current impedance value based on the current current value and the current voltage value, and can identify the area where the current working frequency is located based on the comparison result of the impedance value and the phase difference value; the frequency adjustment unit is connected to the MCU processor, and adjusts the current working frequency by adaptively matching the corresponding adjustment algorithm according to the working state of the current working frequency identified by the MCU processor, until the current working frequency is adjusted to the resonant frequency; the power drive unit is respectively connected to the frequency adjustment unit and the ultrasonic knife transducer, and is used to receive the adjusted working frequency and output the corresponding driving power to the ultrasonic knife transducer.

[0080] In summary, the frequency region-based resonant frequency adjustment method in the above-mentioned embodiment of the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head within the operating frequency range, and comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and phase difference curve to divide the operating frequency range into regions, thereby ensuring the accuracy of the regional division. In addition, the two factors of impedance and phase difference are comprehensively considered to determine the region in which the operating frequency is located. The resonant frequency is automatically adjusted according to the corresponding different frequency adjustment methods in different frequency regions, avoiding the inaccuracy of simply using phase difference as the only determination factor for identification. This solves the problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment after replacing the scalpel head in the prior art.

[0081] Example 2

[0082] This embodiment also proposes a frequency region-based resonant frequency adjustment method. The frequency region-based resonant frequency adjustment method in this embodiment differs from the frequency region-based resonant frequency adjustment method in the first embodiment in that:

[0083] Step S12 includes:

[0084] comparing the absolute value of the phase difference with a first threshold;

[0085] When the absolute value of the phase difference is less than the first threshold, comparing the absolute value of the difference between the impedance value and the second threshold, and the absolute value of the difference between the impedance value and the third threshold, with a fifth threshold;

[0086] If the absolute value of the difference between the impedance value and the second threshold value is smaller than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is larger than the fifth threshold value, it is determined that the current operating frequency is in the resonant frequency region;

[0087] If the absolute value of the difference between the impedance value and the second threshold is greater than the fifth threshold, and the absolute value of the difference between the impedance value and the third threshold is not greater than the fifth threshold, determining that the current operating frequency is in the anti-resonance frequency region;

[0088] When the absolute value of the phase difference is greater than or equal to the first threshold, determining whether the phase difference is a positive number, and if the phase difference is a positive number, determining that the current operating frequency is in the second normal frequency tracking state range;

[0089] If the phase difference is a negative number, it is determined according to the impedance value and the fourth threshold whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region.

[0090] According to the obtained phase difference value θ, the absolute value of the phase difference value |θ| is compared with the first threshold value θ1 (i.e., the phase difference preset value), wherein the value range of the first threshold value can be selected as 15°-40°. If the absolute value of the phase difference value is less than the first threshold value, the impedance value is compared. Specifically, the absolute value of the difference between the impedance value and the second threshold value and the absolute value of the difference between the impedance value and the third threshold value are compared with the fifth threshold value. If the absolute value of the difference between the impedance value and the second threshold value is less than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is greater than the fifth threshold value, it is determined that the current operating frequency is in the resonant frequency region. For example, the impedance value Z is compared with the second threshold value. The absolute value of the difference between the threshold Z1 (i.e., the minimum impedance value, ranging from 20Ω < Z1 ≤ 300Ω) or the impedance value Z and the third threshold Z2 (i.e., the maximum impedance value, ranging from ≥ 2000Ω) and the fifth threshold Z4 (i.e., the preset impedance difference value) is greater than or equal to the threshold Z1. If the absolute value of the difference between the impedance value Z and the second threshold Z1 is |Z-Z1|≤Z4 and the absolute value of the difference between the impedance value Z and the third threshold Z2 is |Z-Z2|>Z4, and the value range of Z4 is 10Ω-20Ω, then it is determined that the current operating frequency f (i.e., the last resonant frequency before the blade head was replaced) is within the resonant frequency range, indicating that the current operating frequency is in the normal operating state of the ultrasonic scalpel device.

[0091] If the absolute value of the difference between the impedance value and the second threshold value is greater than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is not greater than the fifth threshold value, it is determined that the current operating frequency is in the anti-resonance frequency region. For example, if the absolute value of the difference between the impedance value Z and the second threshold value Z1, i.e., |Z-Z1|>Z4, and the absolute value of the difference between the impedance value Z and the third threshold value Z2, i.e., |Z-Z2|≤Z4, it is determined that the current operating frequency f is in the anti-resonance frequency range, which indicates that the current operating frequency is in an abnormal working state of the ultrasonic scalpel device;

[0092] When the absolute value of the phase difference is greater than or equal to the first threshold, it is determined whether the phase difference is a positive number. If the phase difference is a positive number, it is determined that the current operating frequency is in the second normal frequency chasing state area. When the phase difference is a negative number, it is necessary to further determine whether the current operating frequency is in the anti-resonance processing state area or the first normal frequency chasing state area based on the magnitude relationship between the impedance value and the fourth threshold. For example, when the impedance value Z is less than or equal to the fourth threshold Z3, the sum of the current operating frequency f and the third preset fixed adjustment frequency M is output as the next operating frequency f1, until it is determined that the next operating frequency f1 makes the difference between the obtained target phase difference value θ' and the phase difference value θ obtained by the current operating frequency f greater than zero; or the difference between the current operating frequency f and the third preset fixed adjustment frequency M is output. As the next operating frequency f1' output, until it is determined that the next operating frequency f1' makes the difference between the obtained target phase difference value θ" and the phase difference value θ obtained by the current operating frequency less than zero, wherein the magnitude of the phase difference value increases with the increase of frequency or decreases with the decrease of frequency; then it is determined that the current operating frequency is in the first normal frequency chasing state area, illustratively, the target phase difference value is the phase difference value obtained by feedback after the power driving unit outputs the corresponding power to the ultrasonic transducer, and in order to improve the current frequency when it is in the anti-resonance processing state area and the second normal frequency chasing state area, it is quickly adjusted to the anti-resonance frequency interval and the resonant frequency interval, thereby further improving the speed of resonant frequency adjustment and saving resonant frequency adjustment time, the value range of the third preset fixed adjustment frequency M is 100 Hz-200Hz, the value range of the fourth threshold Z3 is 600Ω-800Ω, wherein the fourth threshold is the middle value between the maximum impedance value and the minimum impedance value. Preferably, the fourth threshold is the range between the first preset impedance value and the second preset impedance value. Exemplarily, the first preset impedance value is 800Ω and the second preset impedance value is 600Ω. Since the first normal frequency chasing state region and the anti-resonance processing state region have an overlapping region, that is, the difference between the first preset impedance value and the second preset impedance value is 200Ω, the frequency region to which the current operating frequency ultimately belongs can be further determined by comparing the fourth threshold with the impedance value.

[0093] When the impedance value is greater than the fourth threshold value, it is determined that the current operating frequency is in the anti-resonance processing state area. When the impedance value Z is less than the fourth threshold value Z3, the current operating frequency may also be in the anti-resonance processing state area. For example, the sum of the current operating frequency f and the third preset fixed adjustment frequency M is output as the next operating frequency f1, until it is determined that the next operating frequency f1 makes the difference θ between the obtained target phase difference value θ' and the phase difference value obtained by the current operating frequency f less than zero; or the difference between the current operating frequency f and the third preset fixed adjustment frequency M is output as the next operating frequency f1', until it is determined that the next operating frequency f1' makes the difference between the obtained target phase difference value θ" and the phase difference value θ obtained by the current operating frequency f greater than zero, and it is determined that the current operating frequency is in the said anti-resonance processing state area.

[0094] In addition, in some optional embodiments of the present invention, the sum of the current operating frequency and the third fixed adjustment frequency is used as the next operating frequency output until it is determined that the next operating frequency causes the power drive unit to output the corresponding power to the ultrasonic transducer, and the difference between the phase difference value obtained by the current operating frequency and the phase difference value obtained by the feedback is equal to zero, or the difference between the current operating frequency and the third fixed adjustment frequency is used as the next operating frequency output until it is determined that the next operating frequency causes the power drive unit to output the corresponding power to the ultrasonic transducer, and the difference between the phase difference value obtained by the feedback is equal to zero, then the above-mentioned frequency adjustment is performed again until it is determined that the next operating frequency causes the power drive unit to output the corresponding power to the ultrasonic transducer, and the difference between the phase difference value obtained by the feedback is not zero.

[0095] Correspondingly, in some optional embodiments of the present invention, step S13 includes:

[0096] When the target frequency region where the current operating frequency is located is a resonant frequency region, performing frequency tracking on the current operating frequency using a preset frequency tracking algorithm to obtain the resonant frequency / using the current operating frequency as the resonant frequency;

[0097] When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, the difference between the current operating frequency and the first preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the second normal frequency tracking state region;

[0098] The next operating frequency is adjusted using the preset frequency tracking algorithm until the next operating frequency is within the resonant frequency region, and the next operating frequency is output as the resonant frequency;

[0099] When the target frequency region where the current operating frequency is located is a second normal frequency tracking state region, adjusting the current operating frequency using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and outputting the next operating frequency as the resonant frequency;

[0100] When the target frequency region where the current operating frequency is located is an anti-resonance processing state region, outputting a next operating frequency using a difference between the current operating frequency and a third preset fixed adjustment frequency until the next operating frequency is located in the anti-resonance frequency region, and then adjusting the next operating frequency according to an adjustment strategy for the anti-resonance frequency region;

[0101] When the target frequency region where the current operating frequency is located is a first normal frequency tracking state region, the current operating frequency is adjusted using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0102] Among them, when the current working frequency is in the resonant frequency area, it indicates that the current working frequency is in the normal working state of the ultrasonic scalpel device, that is, the current working frequency is matched with the normal frequency tracking algorithm to adjust the current working frequency, or the current working frequency is directly used as the resonant frequency. For example, if the resonant frequency of the ultrasonic scalpel head before replacement is in the resonant frequency area as the current working frequency, the resonant frequency of the previous ultrasonic scalpel head is directly used as the resonant frequency of the ultrasonic scalpel head after replacement. Among them, the mathematical expression of the preset frequency tracking algorithm is:

[0103] f1=f+Δf;

[0104] Δf=-K*θ;

[0105] Among them, K is a positive number, θ is the phase difference corresponding to the current operating frequency, f is the current operating frequency, and f1 is the adjusted operating frequency, that is, the next operating frequency, wherein f is the input current operating frequency that needs to be adjusted, which can be based on the last resonant frequency after replacing the blade head, or it can be the adjusted frequency after multiple subsequent adjustments. In specific implementation, a mathematical relationship between the phase difference value and the frequency adjustment value is pre-constructed, as shown in Table 1 below, using f1=f+Δf, where Δf=-K*θ, K is a positive number, and K can take different values ​​according to the size of the absolute value of the phase difference. The larger the absolute value of the phase difference |θ|, the larger the K value; the smaller the absolute value of the phase difference |θ|, the smaller the K value, and the next operating frequency f1 is output as the resonant frequency, or when Δf is 0, the current operating frequency f is output as the resonant frequency. Specifically, the power drive unit outputs the corresponding maximum driving power, that is, the maximum driving voltage, to the ultrasonic knife transducer to meet the cutting efficiency and hemostasis effect of the ultrasonic knife device to achieve the best state of surgical effect.

[0106] Table 1

[0107]

[0108] When the target frequency region where the current operating frequency f is located is the anti-resonance frequency region, the difference between the current operating frequency f and the first preset fixed adjustment frequency L can be first used as the next operating frequency f1 output until the next operating frequency f1 is located in the second normal frequency tracking state region; then the preset frequency tracking algorithm is used to adjust the frequency until the frequency is adjusted to be located in the resonant frequency region, and then the next operating frequency located in the resonant frequency region is output as the resonant frequency. In order to ensure that the current operating frequency can steadily enter the corresponding resonant state region or anti-resonance state region in the second normal frequency tracking region or anti-resonance processing state region, and to ensure the stability and accuracy of the frequency tracking adjustment process, the value range of the first preset fixed adjustment frequency L is 10-20Hz. Similarly, when the target frequency region where the current operating frequency is located is the second normal frequency chasing state region, the preset frequency chasing algorithm can be directly used to adjust the resonant frequency until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency; when the target frequency region where the current operating frequency is located is the anti-resonance processing state region, the difference between the current operating frequency f and the third preset fixed adjustment frequency L can be output as the next operating frequency f1 until the next operating frequency f1 is located in the anti-resonance frequency region, and then the next operating frequency f1 is adjusted according to the adjustment strategy of the anti-resonance frequency region; and when the target frequency region where the current operating frequency is located is the first normal frequency chasing state region, the preset frequency chasing algorithm is used to adjust the current operating frequency until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0109] In summary, the frequency region-based resonant frequency adjustment method in the above-mentioned embodiment of the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head within the operating frequency range, comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and phase difference curve to divide the operating frequency range into regions, ensuring the accuracy of the regional division. In addition, the two factors of impedance and phase difference are comprehensively considered to determine the region in which the operating frequency is located. The resonant frequency is automatically adjusted according to the corresponding different frequency adjustment methods in different frequency regions, avoiding the inaccuracy of simply using phase difference as the only determination factor for identification. This solves the problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment after replacing the scalpel head in the prior art.

[0110] Example 3

[0111] See also Figure 4 , which shows a resonant frequency adjustment device based on frequency regions proposed in a third embodiment of the present invention, the device includes:

[0112] An acquisition module 100 is configured to acquire an operating frequency range of an ultrasonic scalpel head, and acquire an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range;

[0113] A division module 200 is configured to divide the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions;

[0114] a comparison module 300 for obtaining a phase difference value and an impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and the impedance value according to a preset rule, and determining a target frequency region in which the current operating frequency is located within the plurality of different frequency regions, wherein the current operating frequency is the previous resonant frequency before the scalpel head was replaced;

[0115] The adjustment module 400 is used to determine a corresponding adjustment strategy according to the target frequency region, and adjust the current operating frequency according to the adjustment strategy until the resonant frequency corresponding to the replaced ultrasonic scalpel head is reached.

[0116] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency regions, the division module is specifically used to:

[0117] The operating frequency range corresponding to the phase difference being zero and the impedance value being minimum and maximum is divided into a resonant frequency region and an anti-resonant frequency region respectively;

[0118] The portion of the operating frequency interval corresponding to a negative phase difference and an impedance value greater than the minimum impedance value but less than the first preset impedance value is divided into a first normal frequency tracking state region;

[0119] The portion of the operating frequency interval corresponding to a positive phase difference and an impedance value greater than a minimum impedance value and less than a maximum impedance value is divided into a second normal frequency tracking state region;

[0120] Dividing a portion of the operating frequency interval corresponding to a negative phase difference and an impedance value less than the maximum impedance value but greater than a second preset impedance value as an anti-resonance processing state region;

[0121] Wherein, the first preset impedance value is greater than the second preset impedance value.

[0122] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency regions, the comparison module is specifically configured to:

[0123] comparing the absolute value of the phase difference with a first threshold;

[0124] When the absolute value of the phase difference is less than the first threshold, comparing the absolute value of the difference between the impedance value and the second threshold, and the absolute value of the difference between the impedance value and the third threshold, with a fifth threshold;

[0125] If the absolute value of the difference between the impedance value and the second threshold value is smaller than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is larger than the fifth threshold value, it is determined that the current operating frequency is in the resonant frequency region;

[0126] If the absolute value of the difference between the impedance value and the second threshold is greater than the fifth threshold, and the absolute value of the difference between the impedance value and the third threshold is not greater than the fifth threshold, it is determined that the current operating frequency is in the resonant frequency range and in the anti-resonant frequency region;

[0127] When the absolute value of the phase difference is greater than or equal to the first threshold, determining whether the phase difference is a positive number, and if the phase difference is a positive number, determining that the current operating frequency is in the second normal frequency tracking state range;

[0128] If the phase difference is a negative number, it is determined that the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold.

[0129] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency regions, the comparison module is specifically configured to:

[0130] When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero;

[0131] Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero;

[0132] It is determined that the current operating frequency is in the first normal frequency tracking state area.

[0133] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency regions, the comparison module is specifically configured to:

[0134] When the impedance value is greater than a fourth threshold, it is determined that the current operating frequency is in the anti-resonance processing state region;

[0135] When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero;

[0136] Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero;

[0137] It is determined that the current operating frequency is in the anti-resonance processing state area.

[0138] Furthermore, in some optional embodiments of the present invention, the adjustment module is specifically configured to:

[0139] When the target frequency region where the current operating frequency is located is a resonant frequency region, performing frequency tracking on the current operating frequency using a preset frequency tracking algorithm to obtain the resonant frequency / using the current operating frequency as the resonant frequency;

[0140] When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, the difference between the current operating frequency and the first preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the second normal frequency tracking state region;

[0141] The next operating frequency is adjusted using the preset frequency tracking algorithm until the next operating frequency is within the resonant frequency region, and the next operating frequency is output as the resonant frequency;

[0142] When the target frequency region where the current operating frequency is located is a second normal frequency tracking state region, adjusting the current operating frequency using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and outputting the next operating frequency as the resonant frequency;

[0143] When the target frequency region where the current operating frequency is located is an anti-resonance processing state region, outputting a next operating frequency using a difference between the current operating frequency and a third preset fixed adjustment frequency until the next operating frequency is located in the anti-resonance frequency region, and then adjusting the next operating frequency according to an adjustment strategy for the anti-resonance frequency region;

[0144] When the target frequency region where the current operating frequency is located is a first normal frequency tracking state region, the current operating frequency is adjusted using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0145] Furthermore, in some optional embodiments of the present invention, the mathematical expression of the preset frequency tracking algorithm is:

[0146] f1=f+Δf;

[0147] Δf=-K*θ;

[0148] Wherein, K is a positive number, θ is the phase difference corresponding to the current operating frequency, f is the current operating frequency, and f1 is the adjusted operating frequency, i.e., the next operating frequency.

[0149] The functions or operation steps implemented when the above modules are executed are substantially the same as those in the above method embodiments and will not be repeated here.

[0150] Example 4

[0151] Another aspect of the present invention further provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any one of the above-mentioned embodiments 1 to 2.

[0152] Example 5

[0153] On the other hand, the present invention also provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and runnable on the processor, and when the processor executes the program, the steps of the method described in any one of the above embodiments one to two are implemented.

[0154] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0155] Those skilled in the art will appreciate that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device), or for use in conjunction with such instruction execution system, apparatus, or device. For purposes of this specification, a "computer-readable storage medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device.

[0156] More specific examples (a non-exhaustive list) of computer-readable storage media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0157] It should be understood that various components of the present invention may be implemented using hardware, software, firmware, or a combination thereof. In the aforementioned embodiments, multiple steps or methods may be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one or a combination of the following technologies known in the art may be used: a discrete logic circuit having logic gate circuits for implementing logic functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc.

[0158] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0159] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for adjusting resonant frequency based on frequency region, characterized in that: The method comprises: Obtaining an operating frequency range of an ultrasonic scalpel head, and obtaining an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range; Dividing the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions; Obtaining a phase difference value and an impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and the impedance value according to a preset rule, and determining a target frequency region in which a current operating frequency is located within the multiple different frequency regions, wherein the current operating frequency is the previous resonant frequency before the scalpel head was replaced; Determining a corresponding adjustment strategy according to the target frequency region, and adjusting the current operating frequency according to the adjustment strategy until the resonant frequency corresponding to the replaced ultrasonic scalpel head is reached; The step of dividing the operating frequency range into regions according to the characteristic values ​​reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions comprises: The operating frequency range corresponding to the phase difference being zero and the impedance value being minimum and maximum is divided into a resonant frequency region and an anti-resonant frequency region respectively; The portion of the operating frequency interval where the phase difference is negative and the impedance value is greater than the minimum impedance value but less than the first preset impedance value is divided into a first normal frequency tracking state region; The portion of the operating frequency interval corresponding to a positive phase difference and an impedance value greater than a minimum impedance value and less than a maximum impedance value is divided into a second normal frequency tracking state region; The part of the operating frequency interval where the phase difference is negative and the impedance value is less than the maximum impedance value but greater than the second preset impedance value is divided into an anti-resonance processing state area; Wherein, the first preset impedance value is greater than the second preset impedance value; The steps of obtaining the phase difference value and the impedance value of the current ultrasonic scalpel head after replacement, comparing the phase difference value and the impedance value according to a preset rule, and determining the target frequency region where the current operating frequency is located in the multiple different frequency regions include: comparing the absolute value of the phase difference with a first threshold; When the absolute value of the phase difference is less than the first threshold, comparing the absolute value of the difference between the impedance value and the second threshold, and the absolute value of the difference between the impedance value and the third threshold, with a fifth threshold; If the absolute value of the difference between the impedance value and the second threshold value is smaller than the fifth threshold value, and the absolute value of the difference between the impedance value and the third threshold value is larger than the fifth threshold value, it is determined that the current operating frequency is in the resonant frequency region; If the absolute value of the difference between the impedance value and the second threshold is greater than the fifth threshold, and the absolute value of the difference between the impedance value and the third threshold is not greater than the fifth threshold, determining that the current operating frequency is in the anti-resonance frequency region; When the absolute value of the phase difference is greater than or equal to the first threshold, determining whether the phase difference is a positive number, and if the phase difference is a positive number, determining that the current operating frequency is in the second normal frequency tracking state range; If the phase difference is a negative number, it is determined according to the impedance value and the fourth threshold whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region.

2. The method for adjusting the resonant frequency based on frequency region according to claim 1, wherein: The step of determining whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold comprises: When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero; Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero; It is determined that the current operating frequency is in the first normal frequency tracking state area.

3. The method for adjusting the resonant frequency based on frequency regions according to claim 2, wherein: The step of determining whether the current operating frequency is in the anti-resonance processing state region or the first normal frequency tracking state region according to the impedance value and the fourth threshold value further includes: When the impedance value is greater than a fourth threshold, it is determined that the current operating frequency is in the anti-resonance processing state region; When the impedance value is less than or equal to a fourth threshold, the sum of the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency less than zero; Alternatively, the difference between the current operating frequency and the third preset fixed adjustment frequency is used as the next operating frequency output, until it is determined that the next operating frequency makes the difference between the obtained target phase difference value and the phase difference value obtained at the current operating frequency greater than zero; It is determined that the current operating frequency is in the anti-resonance processing state area.

4. The method for adjusting the resonant frequency based on frequency region according to claim 1, wherein: The step of determining a corresponding adjustment strategy according to the target frequency region, and adjusting the current operating frequency by the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached comprises: When the target frequency region where the current operating frequency is located is a resonant frequency region, performing frequency tracking on the current operating frequency using a preset frequency tracking algorithm to obtain the resonant frequency / using the current operating frequency as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, the difference between the current operating frequency and the first preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the second normal frequency tracking state region; The next operating frequency is adjusted using the preset frequency tracking algorithm until the next operating frequency is within the resonant frequency region, and the next operating frequency is output as the resonant frequency; When the target frequency region where the current operating frequency is located is a second normal frequency tracking state region, adjusting the current operating frequency using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and outputting the next operating frequency as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance processing state region, outputting a next operating frequency using a difference between the current operating frequency and a third preset fixed adjustment frequency until the next operating frequency is located in the anti-resonance frequency region, and then adjusting the next operating frequency according to an adjustment strategy for the anti-resonance frequency region; When the target frequency region where the current operating frequency is located is a first normal frequency tracking state region, the current operating frequency is adjusted using a preset frequency tracking algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

5. The method for adjusting the resonant frequency based on frequency regions according to claim 4, wherein: The mathematical expression of the preset frequency tracking algorithm is: f1=f+Δf; Δf=-K*θ; Wherein, K is a positive number, θ is the phase difference corresponding to the current operating frequency, f is the current operating frequency, and f1 is the adjusted operating frequency, i.e., the next operating frequency.

6. A resonant frequency adjustment device based on frequency region, characterized in that: For implementing the method for adjusting the resonant frequency based on frequency regions according to any one of claims 1 to 5, the device comprises: An acquisition module, configured to acquire an operating frequency range of an ultrasonic scalpel head, and acquire an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range; A division module, configured to divide the operating frequency range into regions according to characteristic values ​​reflected by the impedance curve and the phase difference curve, to obtain a plurality of different frequency regions; a comparison module, configured to obtain a phase difference value and an impedance value of the current ultrasonic scalpel head after replacement, compare the phase difference value and the impedance value according to a preset rule, and determine a target frequency region in which the current operating frequency is located within the plurality of different frequency regions, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced; The adjustment module is used to determine a corresponding adjustment strategy according to the target frequency region, and adjust the current operating frequency according to the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached.

7. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

8. An electronic device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 5 when executing the program.

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