Resonant frequency adjusting method and device based on frequency region

Abstract

The invention discloses a resonant frequency adjusting method and device based on a frequency region, and the method comprises the steps: obtaining a working frequency interval of an ultrasonic scalpel head, and obtaining an impedance curve and a phase difference curve of the ultrasonic scalpel head in the working frequency interval; performing regional division on the working frequency interval according to characteristic values reflected by the impedance curve and the phase difference curve to obtain a plurality of different frequency regions; the phase difference value and the impedance value of the replaced current ultrasonic knife head are obtained, the phase difference value and the impedance value are compared according to a preset rule, and the target frequency area where the current working frequency is located in the multiple different frequency areas is determined; and determining a corresponding adjustment strategy according to the target frequency region, and adjusting the current working frequency through the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic knife head is reached. The problem that in the prior art, resonant frequency adjustment is not accurate after the tool bit is replaced is solved.

Description

Technical Field

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

[0002] Ultrasonic soft tissue cutting and hemostasis equipment (abbreviated as ultrasonic knife equipment) converts electrical energy into mechanical energy and uses the vibration energy generated by the ultrasonic transducer to drive the knife rod to perform high-frequency mechanical vibration. It is usually used in surgical operations. In order to achieve efficient cutting and hemostasis effects, it is necessary to adjust the vibration frequency of the ultrasonic knife head in real time to always be in a resonant state. In practice, doctors tend to forget to perform a self-check of the resonant frequency after replacing the knife head, resulting in the problem of not being able to meet surgical needs.

[0003] To avoid this, some existing technologies force users to perform no-load self-tests after replacing the cutter head. These include adding hardware to detect the cutter head connection status or identifying the connection through software, and extending the periodic frequency sweep time or number, but this will affect the life of the ultrasonic transducer.

[0004] Therefore, a method of ensuring the resonant state by locking the zero phase difference between the voltage and the current has been developed. However, the frequency range of the method of ensuring 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 in impedance and the aging of the blade circuit, the points where the phase difference is zero or close to zero also fluctuate. Therefore, there is uncertainty in the judgment method using a simple phase difference value, which leads to the problem of inaccurate adjustment of the resonant frequency. Summary of the invention

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

[0006] The embodiment of the present invention is implemented as follows: A method for adjusting a resonance frequency based on a frequency region, the method comprising: 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; 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 where the current operating frequency is located in the multiple different frequency regions, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced; 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.

[0007] 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 comprises: The parts of the operating frequency interval corresponding to the zero phase difference and the minimum and maximum impedance values ​​are respectively divided into a resonant frequency region and an anti-resonant frequency region; The part of the working frequency interval corresponding to the phase difference being a negative number and the impedance value being greater than the minimum impedance value but less than the first preset impedance value is divided into a first normal frequency tracking state area; The part of the working frequency interval corresponding to the phase difference being a positive number and the impedance value being greater than the minimum impedance value and less than the maximum impedance value is divided into a second normal frequency tracking state area; 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 the second preset impedance value as an anti-resonance processing state region; Wherein, the first preset impedance value is greater than the second preset impedance value.

[0008] Furthermore, in the above-mentioned resonant frequency adjustment method based on frequency regions, 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 smaller 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, it is determined that the current operating frequency is in the resonant frequency interval and in the anti-resonant 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 region; If the phase difference is a negative number, it is determined that the current operating frequency is in an anti-resonance processing state region or a first normal frequency tracking state region according to the impedance value and the fourth threshold.

[0009] Furthermore, in the above-mentioned resonant frequency adjustment method based on 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: When the impedance value is less than or equal to the fourth threshold value, the sum of 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 by the current operating frequency greater than zero; Or, 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 by the current operating frequency less than zero; It is determined that the current operating frequency is in the first normal frequency tracking state area.

[0010] 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: 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 the fourth threshold value, the sum of 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 by the current operating frequency less than zero; Or, 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 by the current operating frequency greater than zero; It is determined that the current operating frequency is in the anti-resonance processing state area.

[0011] Furthermore, in the above-mentioned method for adjusting the resonant frequency based on the frequency region, the step of determining the 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 current ultrasonic scalpel head after replacement is reached includes: When the target frequency region where the current operating frequency is located is a resonant frequency region, the current operating frequency is chased by using a preset frequency chasing algorithm to obtain the resonant frequency / the current operating frequency is used as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, a 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 preset frequency tracking algorithm is used to adjust the next 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; When the target frequency region where the current operating frequency is located is a second normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm 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 an anti-resonance processing state region, the difference between the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the anti-resonance frequency region, and then the next operating frequency is adjusted according to the adjustment strategy of the anti-resonance frequency region; When the target frequency region where the current operating frequency is located is a first normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0012] Furthermore, in the above-mentioned method for adjusting the resonance frequency based on the frequency region, 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.

[0013] Another object of the present invention is to provide a resonant frequency adjustment device based on frequency region, the device comprising: An acquisition module, used for acquiring an operating frequency range of an ultrasonic scalpel head, and acquiring an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range; A division module, used for dividing the operating frequency interval 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; A comparison module, used 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 where the current operating frequency is located in the multiple 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 through the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic knife head is reached.

[0014] 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.

[0015] 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 processor implements the steps of the above method when executing the program.

[0016] Compared with the prior art, the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head in the working frequency range, comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and the phase difference curve to divide the working frequency range into regions, ensures the accuracy of the regional division, and comprehensively considers the two factors of impedance and phase difference to determine the region where the working frequency is located, and realizes automatic adjustment of the resonant frequency according to the corresponding different frequency adjustment methods in different frequency regions, avoiding the inaccuracy of simply using the phase difference as the only determination factor for identification. The problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment in the prior art after replacing the scalpel head is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flow chart of a method for adjusting a resonance frequency based on a frequency region provided in a first embodiment of the present invention; Figure 2 A schematic diagram of region division in a method for adjusting a resonance frequency based on frequency regions in one embodiment of the present invention; Figure 3 It is a structural schematic diagram of a frequency control system in a resonant frequency adjustment method based on frequency regions in one embodiment of the present invention; 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.

[0018] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] 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 a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] 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 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.

[0023] 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 prior art, 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, so as to ensure that it meets the basic operating requirements of subsequent operations, that is, the ultrasonic scalpel device meets the requirements of clinical surgery.

[0024] But in fact, one operation may need to use more than one ultrasonic scalpel head. When the doctor replaces the ultrasonic scalpel head, he sometimes forgets to perform no-load frequency sweep self-test on the resonant frequency of the replaced ultrasonic scalpel head, so that the operating frequency currently output by the ultrasonic scalpel device host, that is, the operating frequency that was in the resonant state last time, is likely to be unable to meet the resonance state of the replaced ultrasonic scalpel head (because the inherent 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 operating 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 existing frequency tracking method will cause the current operating 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 detect or identify the connection status between the blade head and the ultrasonic transducer in a cost-increasing manner, 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 mode to identify whether the blade head is connected, the ultrasonic transducer needs to continue to output for a long time, thereby affecting the normal service life of the ultrasonic transducer.

[0025] In the prior art, there is a method of solving the above-mentioned problem by locking the zero phase difference between the voltage and the current to ensure the resonant state. However, the frequency range of the method of ensuring the resonant state is simply identified by using the phase difference as the only determining factor. Since part of the resonant frequency region will change in real time with the change of impedance and the aging of the blade circuit, the point where the phase difference is zero or close to zero also fluctuates. Therefore, there is uncertainty in the judgment method using a simple phase difference value, which leads to the problem of inaccurate adjustment of the resonant frequency.

[0026] 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 the 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.

[0027] The following will describe in detail how to improve the accuracy of adjusting the resonant frequency of an ultrasonic knife device after replacing the blade head in conjunction with specific embodiments and drawings.

[0028] Embodiment 1 See also Figure 1 , which shows a resonance frequency adjustment method based on frequency regions in a first embodiment of the present invention, and the method includes steps S10 to S13.

[0029] Step S10, obtaining the operating frequency range of the ultrasonic scalpel head, and obtaining the impedance curve and phase difference curve of the ultrasonic scalpel head in the operating frequency range.

[0030] 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 in shape. Specifically, the existing impedance analyzer can be used to test the scalpel head system composed of an ultrasonic scalpel handle, an ultrasonic transducer, a horn, a shank, and a shank sleeve, so as to obtain the curve relationship between frequency, impedance, and phase difference. For example, Figure 2 As shown, the horizontal axis in the figure represents the frequency F, and the vertical axis represents the impedance Z and the phase difference P respectively, wherein 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.

[0031] 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.

[0032] 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, such as Figure 2As shown in the figure, 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 segment, CD segment, D segment and DE segment, within the working frequency range. The curve area is a plurality of different frequency areas, more specifically, mainly including a resonant frequency area, an anti-resonant frequency area, a first normal frequency chasing state area, a second normal frequency chasing state area and an 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. The impedance values ​​of the DE and OC areas have a certain overlapping area.

[0033] Step S12, obtaining the phase difference value and impedance value of the current ultrasonic knife head after replacement, comparing the phase difference value and impedance value according to preset rules, and determining 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 blade head was replaced.

[0034] 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 working 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 working 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.

[0035] It can be understood that by introducing impedance values ​​to divide and determine regions, the problem of inaccurate region determination caused by determining regions only by phase differences can be avoided. 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 resonance frequency corresponding to the current ultrasonic scalpel head after replacement is reached.

[0036] Among them, matching different frequency adjustment processing methods to adjust the current working frequency can achieve frequency tracking and resonance state of the current working frequency without forced frequency sweep self-test after the user replaces a new cutter head.

[0037] 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; 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 according to 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, 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, for receiving the adjusted working frequency and outputting the corresponding driving power to the ultrasonic knife transducer.

[0038] In summary, the frequency region-based resonant frequency adjustment method in the above embodiment of the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head in the working frequency range, comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and the phase difference curve to divide the working frequency range into regions, ensures the accuracy of the regional division, and comprehensively considers the two factors of impedance and phase difference to determine the region where the working frequency is located, and realizes automatic adjustment of the resonant frequency for 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. The problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment in the prior art after replacing the scalpel head is solved.

[0039] Embodiment 2 This embodiment also proposes a resonance frequency adjustment method based on frequency regions. The difference between the resonance frequency adjustment method based on frequency regions in this embodiment and the resonance frequency adjustment method based on frequency regions in the first embodiment is that: Step S12 includes: Comparing the absolute value of the phase difference with a first threshold; When the absolute value of the phase difference is smaller 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, it is determined 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 region; 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.

[0040] According to the acquired phase difference value θ, the absolute value |θ| of the phase difference value is compared with the first threshold value θ1 (i.e., the preset phase difference 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. Exemplarily, 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, with a value range of 20Ω<Z1≤300Ω) or the impedance value Z and the third threshold Z2 (i.e., the maximum impedance value, with a value range of ≥2000Ω) and the fifth threshold Z4 (i.e., the preset impedance difference value). 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, it is determined that the current operating frequency f (i.e., the last resonant frequency before the blade head was replaced) is in the resonant frequency range, which indicates that the current operating frequency is in the normal working state of the ultrasonic knife device; 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 interval, which indicates that the current operating frequency is in an abnormal working state of the ultrasonic knife device; 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 in 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 used 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 f greater than zero; or the difference between the current operating frequency f and the third preset fixed adjustment frequency M is used. 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, and exemplarily, 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 in the anti-resonance processing state area and the second normal frequency chasing state area When the state 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 the adjustment time of the resonant frequency, 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 value between the first preset impedance value and the second preset impedance value, illustratively, the first preset impedance value is 800Ω, and the second preset impedance value is 600Ω. Since the first normal frequency chasing state area and the anti-resonance processing state area have an overlapping area, that is, the difference between the first preset impedance value and the second preset impedance value is 200Ω, the frequency area to which the current operating frequency finally belongs can be further determined by comparing the fourth threshold with the impedance value; 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 acquired target phase difference value θ' and the phase difference value acquired 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 acquired target phase difference value θ" and the phase difference value θ acquired by the current operating frequency f greater than zero, it is determined that the current operating frequency is in the anti-resonance processing state area.

[0041] 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.

[0042] Correspondingly, in some optional embodiments of the present invention, step S13 includes: When the target frequency region where the current operating frequency is located is a resonant frequency region, the current operating frequency is chased by using a preset frequency chasing algorithm to obtain the resonant frequency / the current operating frequency is used as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, a 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 preset frequency tracking algorithm is used to adjust the next 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; When the target frequency region where the current operating frequency is located is a second normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm 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 an anti-resonance processing state region, the difference between the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the anti-resonance frequency region, and then the next operating frequency is adjusted according to the adjustment strategy of the anti-resonance frequency region; When the target frequency region where the current operating frequency is located is a first normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0043] 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 knife 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 knife head before replacement is in the resonant frequency area as the current working frequency, the resonant frequency of the previous ultrasonic knife head is directly used as the resonant frequency of the ultrasonic knife head after replacement, wherein the mathematical expression of the preset frequency tracking algorithm is: f1=f+Δf; Δf=-K*θ; Among them, K is a positive number, θ is the phase difference corresponding to the current working frequency, f is the current working frequency, and f1 is the adjusted working frequency, that is, the next working frequency, wherein f is the input current working 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 the specific implementation, a mathematical relationship between the phase difference value and the frequency adjustment value is pre-constructed, as shown in Table 1 below, and f1=f+Δf is adopted, wherein Δf=-K*θ, and K is a positive number. K can take different values ​​according to different absolute values ​​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 working frequency f1 is output as the resonant frequency, or when Δf is 0, the current working 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.

[0044] Table 1

[0045] 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.

[0046] In summary, the resonant frequency adjustment method based on frequency region in the above embodiment of the present invention simultaneously obtains the impedance curve and phase difference curve of the ultrasonic scalpel head in the working frequency range, and comprehensively considers the characteristic values ​​of impedance and phase difference shown by the impedance curve and the phase difference curve to divide the working frequency range into regions, thereby ensuring the accuracy of the regional division, and comprehensively considers the two factors of impedance and phase difference to determine the region where the working frequency is located, and realizes automatic adjustment of the resonant frequency for the corresponding different frequency adjustment methods in different frequency regions, thereby avoiding the inaccuracy of simply using the phase difference as the only determination factor for identification. The problem of inaccurate resonant frequency adjustment of ultrasonic scalpel equipment in the prior art after replacing the scalpel head is solved.

[0047] Embodiment 3 See also Figure 4 , shown is a resonant frequency adjustment device based on frequency region proposed in the third embodiment of the present invention, the device comprising: An acquisition module 100 is used 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 200, configured to divide the operating frequency interval 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; A comparison module 300 is used 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 where the current operating frequency is located in the multiple different frequency regions, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced; The adjustment module 400 is used to determine a corresponding adjustment strategy according to the target frequency region, and adjust the current operating frequency through the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic knife head is reached.

[0048] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency regions, the division module is specifically used for: The parts of the operating frequency interval corresponding to the zero phase difference and the minimum and maximum impedance values ​​are respectively divided into a resonant frequency region and an anti-resonant frequency region; Divide the part of the working frequency interval corresponding to the negative phase difference and the impedance value greater than the minimum impedance value but less than the first preset impedance value into a first normal frequency tracking state area; The part of the working frequency interval corresponding to the phase difference being a positive number and the impedance value being greater than the minimum impedance value and less than the maximum impedance value is divided into a second normal frequency tracking state area; 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; Wherein, the first preset impedance value is greater than the second preset impedance value.

[0049] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency region, the comparison module is specifically used for: Comparing the absolute value of the phase difference with a first threshold; When the absolute value of the phase difference is smaller 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, it is determined that the current operating frequency is in the resonant frequency interval and in the anti-resonant 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 region; If the phase difference is a negative number, it is determined that the current operating frequency is in an anti-resonance processing state region or a first normal frequency tracking state region according to the impedance value and the fourth threshold.

[0050] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency region, the comparison module is specifically used for: When the impedance value is less than or equal to the fourth threshold value, the sum of 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 by the current operating frequency greater than zero; Or, 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 by the current operating frequency less than zero; It is determined that the current operating frequency is in the first normal frequency tracking state area.

[0051] Furthermore, in the above-mentioned resonant frequency adjustment device based on frequency region, the comparison module is specifically used for: 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 the fourth threshold value, the sum of 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 by the current operating frequency less than zero; Or, 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 by the current operating frequency greater than zero; It is determined that the current operating frequency is in the anti-resonance processing state area.

[0052] Further, in some optional embodiments of the present invention, the adjustment module is specifically used for: When the target frequency region where the current operating frequency is located is a resonant frequency region, the current operating frequency is chased by using a preset frequency chasing algorithm to obtain the resonant frequency / the current operating frequency is used as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, a 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 preset frequency tracking algorithm is used to adjust the next 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; When the target frequency region where the current operating frequency is located is a second normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm 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 an anti-resonance processing state region, the difference between the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the anti-resonance frequency region, and then the next operating frequency is adjusted according to the adjustment strategy of the anti-resonance frequency region; When the target frequency region where the current operating frequency is located is a first normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

[0053] Furthermore, in some optional embodiments of the present invention, 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.

[0054] 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.

[0055] Embodiment 4 Another aspect of the present invention further provides a readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the steps of the method described in any one of the above embodiments 1 to 2 are implemented.

[0056] Embodiment 5 Another aspect of the present invention provides an electronic device, which includes 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 described in any one of the above-mentioned embodiments one to two when executing the program.

[0057] The technical features of the above embodiments can be combined arbitrarily. 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.

[0058] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable storage medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable storage medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0059] 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 case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable storage medium may even be a 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, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0060] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for adjusting the resonant frequency based on frequency region, It is characterized in that The method comprises: 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; 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 where the current operating frequency is located in the multiple different frequency regions, wherein the current operating frequency is the last resonant frequency before the scalpel head is replaced; A corresponding adjustment strategy is determined according to the target frequency region, and the current operating frequency is adjusted by the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic scalpel head is reached.

2. The method for adjusting the resonance frequency based on the frequency region according to claim 1, It is characterized in that 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 parts of the operating frequency interval corresponding to the zero phase difference and the minimum and maximum impedance values ​​are respectively divided into a resonant frequency region and an anti-resonant frequency region; The part of the working frequency interval corresponding to the phase difference being a negative number and the impedance value being greater than the minimum impedance value but less than the first preset impedance value is divided into a first normal frequency tracking state area; The part of the working frequency interval corresponding to the phase difference being a positive number and the impedance value being greater than the minimum impedance value and less than the maximum impedance value is divided into a second normal frequency tracking state area; 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 the second preset impedance value as an anti-resonance processing state region; Wherein, the first preset impedance value is greater than the second preset impedance value.

3. The method for adjusting the resonance frequency based on the frequency region according to claim 2, It is characterized in that The step 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 includes: Comparing the absolute value of the phase difference with a first threshold; When the absolute value of the phase difference is smaller 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, it is determined 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 region; 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.

4. The method for adjusting the resonance frequency based on the frequency region according to claim 3, It is characterized in that The step of determining, 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 comprises: When the impedance value is less than or equal to the fourth threshold value, the sum of 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 by the current operating frequency greater than zero; Or, 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 by the current operating frequency less than zero; It is determined that the current operating frequency is in the first normal frequency tracking state area.

5. The method for adjusting the resonance frequency based on the frequency region according to claim 3, It is characterized in that The step of determining, 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 further comprises: 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 the fourth threshold value, the sum of 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 by the current operating frequency less than zero; Or, 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 by the current operating frequency greater than zero; It is determined that the current operating frequency is in the anti-resonance processing state area.

6. The method for adjusting the resonance frequency based on the frequency region according to claim 2, It is characterized in that 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, the current operating frequency is chased by using a preset frequency chasing algorithm to obtain the resonant frequency / the current operating frequency is used as the resonant frequency; When the target frequency region where the current operating frequency is located is an anti-resonance frequency region, a 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 preset frequency tracking algorithm is used to adjust the next 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; When the target frequency region where the current operating frequency is located is a second normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm 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 an anti-resonance processing state region, the difference between the current operating frequency and the third preset fixed adjustment frequency is output as the next operating frequency until the next operating frequency is located in the anti-resonance frequency region, and then the next operating frequency is adjusted according to the adjustment strategy of the anti-resonance frequency region; When the target frequency region where the current operating frequency is located is a first normal frequency chasing state region, the current operating frequency is adjusted using a preset frequency chasing algorithm until the next operating frequency is located in the resonant frequency region, and the next operating frequency is output as the resonant frequency.

7. The method for adjusting the resonance frequency based on the frequency region according to claim 6, It is characterized in that 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.

8. A resonant frequency adjustment device based on frequency region, It is characterized in that The device comprises: An acquisition module, used for acquiring an operating frequency range of an ultrasonic scalpel head, and acquiring an impedance curve and a phase difference curve of the ultrasonic scalpel head in the operating frequency range; A division module, used for dividing the operating frequency interval 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; A comparison module, used 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 where the current operating frequency is located in the multiple 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 through the adjustment strategy until the resonant frequency corresponding to the replaced current ultrasonic knife head is reached.

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

10. An electronic device, It is 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 7 when executing the program.

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