CN119087329B - Automatic calibration method and system for high-frequency electrosurgical unit neutral electrode impedance detection - Google Patents
Automatic calibration method and system for high-frequency electrosurgical unit neutral electrode impedance detection Download PDFInfo
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Abstract
The invention provides an automatic calibration method and a system for detecting the impedance of a neutral electrode of a high-frequency electrotome, which relate to the technical field of neutral electrode detection, and specifically comprise the following steps of S1, obtaining an optimal resonant frequency; and S2, when the frequency of the excitation signal source is the optimal resonance frequency, recording a plurality of second voltages by switching preset impedance connected between the two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve, wherein when the measured voltage obtained by detecting the neutral electrode impedance at the optimal resonance frequency is obtained, the impedance calibration is performed on the voltage impedance fitting curve according to the measured voltage, so that calibration errors are avoided, and the calibration rate is improved.
Description
Technical Field
The invention relates to the technical field of neutral electrode detection, in particular to an automatic calibration method and system for detecting the impedance of a neutral electrode of a high-frequency electrotome.
Background
In the high-frequency electrotome, neutral electrode impedance detection can be used for judging whether the neutral electrode is well adhered to a patient, so that safety accidents such as unexpected scalds and the like caused by the defect of adhering the neutral electrode are avoided.
The existing neutral electrode detection circuit is a low-voltage resonant circuit generally, the detection accuracy and consistency are not high, and the accuracy of impedance detection is affected by errors caused by the magnetic element and the capacitive element, so that the impedance detection is required to be calibrated during equipment production, the existing calibration process is time-consuming, and meanwhile, certain error probability exists in the calibration of production personnel.
Disclosure of Invention
The invention aims to provide an automatic calibration method and system for detecting the neutral electrode impedance of a high-frequency electrotome, wherein the method mainly adopts a section curve fitting mode, firstly finds the optimal resonant frequency under a fixed impedance, then carries out sectional curve calibration fitting under the optimal resonant frequency, divides the voltage and the corresponding impedance into a plurality of reference section sections, measures the voltage value corresponding to the reference impedance under the optimal resonant frequency, carries out curve fitting in the reference section sections, realizes curve calibration, can be completely realized by an automatic calibration program in the whole process, and improves the calibration rate and the impedance detection accuracy.
In order to solve the technical problems, the invention adopts the following scheme:
an automatic calibration method for detecting the impedance of a neutral electrode of a high-frequency electrotome, which comprises the following steps:
s1, when a fixed impedance is connected between two neutral electrodes, recording a plurality of first voltages by switching the frequency of an excitation signal source, and taking the frequency generating the maximum first voltage as an optimal resonance frequency;
S2, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
And S3, when the measured voltage obtained by detecting the neutral electrode impedance at the optimal resonance frequency is obtained, carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage.
Further, the step S2 specifically includes the following steps:
s21, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes;
S22, establishing a mapping relation between a plurality of preset impedances and corresponding second voltages;
s23, segmenting a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
and S24, performing curve fitting according to the second voltage in the reference interval section and the preset impedance to obtain voltage impedance fitting curves corresponding to the reference interval sections.
Further, in S3, the impedance calibration process specifically includes:
The method comprises the steps of obtaining actual measurement voltage obtained by detecting neutral electrode impedance according to optimal resonance frequency and current preset impedance, finding a corresponding reference interval section and a voltage impedance fitting curve thereof according to the actual measurement voltage, substituting the actual measurement voltage into the corresponding voltage impedance fitting curve to calculate the current preset impedance, and readjusting the reference interval section and the voltage impedance fitting curve according to the current preset impedance and the current preset impedance.
Further, in S23, the process of performing section segmentation on the plurality of preset impedances to form a plurality of reference section segments including the second voltage and the preset impedances specifically includes:
Sequencing the preset impedances, segmenting the sequenced preset impedances in intervals, and taking two continuous preset impedances as the head parts/tail parts of the reference interval sections respectively, wherein the n sequenced preset impedances are segmented in intervals to form n-1 reference interval sections.
Further, in S24, the process of performing curve fitting according to the second voltage and the preset impedance in the reference interval section specifically includes:
Constructing a fitting formula for each reference interval, wherein the fitting formula is y=ax+b, y is represented as an impedance value, x is represented as a voltage value, and a and b are fitting parameters;
Obtaining a second voltage mapped by the preset impedance positioned at the head and the tail according to the mapping relation between the preset impedance and the second voltage;
Substituting preset impedance at the head and the tail of each reference interval section and corresponding second voltage into a fitting formula to solve unknown coefficients, and solving a and b in the fitting formula to form a voltage impedance fitting curve.
Further, in S1, the frequency of the excitation signal source is switched by the controllable PWM to make the excitation signal source output different frequencies, and the frequency generation can realize the frequency self-increase according to the step preset frequency.
Further, the neutral electrode impedance detection is used for judging the pasting quality of the neutral electrode by detecting the resistance value between two neutral electrodes.
An automatic calibration system for high frequency electrotome neutral electrode impedance detection, comprising:
An optimal resonance frequency obtaining module that records a plurality of first voltages by switching the frequency of the excitation signal source when a fixed impedance is connected between the two neutral electrodes, and takes the frequency at which the maximum first voltage is generated as an optimal resonance frequency;
When the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
and the impedance calibration module is used for carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage when the measured voltage obtained by carrying out neutral electrode impedance detection at the optimal resonant frequency is obtained.
Further, the voltage impedance fitting curve obtaining module further comprises the following submodules:
the second voltage obtaining module records a plurality of second voltages by switching preset impedance connected between the two neutral electrodes when the frequency of the excitation signal source is the optimal resonant frequency;
The impedance voltage mapping module is used for establishing mapping relation between a plurality of preset impedances and corresponding second voltages;
the interval segmentation module is used for carrying out interval segmentation on a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
And the curve fitting module is used for performing curve fitting according to the second voltage and the preset impedance in the reference interval section to obtain voltage impedance fitting curves corresponding to the reference interval sections.
The invention has the beneficial effects that:
The invention provides an automatic calibration method and system for detecting the neutral electrode impedance of a high-frequency electrotome, wherein the method mainly adopts a section curve fitting mode, voltage and corresponding impedance are divided into a plurality of reference section sections, curve fitting is carried out in the reference section sections through optimal resonant frequency, curve calibration is realized, and the reference section sections and the voltage impedance fitting curve can be readjusted according to actual measured values, so that calibration errors are avoided, and the calibration rate is improved.
Drawings
Fig. 1 is a flow chart of an automatic calibration method for detecting the impedance of a neutral electrode of a high-frequency electric knife according to embodiment 1 of the present invention.
Fig. 2 is an interactive schematic diagram of an automatic calibration method for detecting the impedance of the neutral electrode of the high-frequency electric knife in embodiment 1 of the present invention.
Fig. 3 is a schematic diagram of a neutral electrode impedance detection circuit of a high-frequency electrotome according to embodiment 1 of the present invention.
Fig. 4 is a schematic diagram of a module when a fixed impedance is connected between two neutral electrodes in embodiment 1 of the present invention.
Fig. 5 is a schematic diagram of a module when the frequency of the excitation signal source is the optimal resonant frequency in embodiment 1 of the present invention.
Fig. 6 is a graph schematically showing a voltage impedance fitting curve in embodiment 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
In addition, descriptions of well-known structures, functions and configurations may be omitted for clarity and conciseness. Those of ordinary skill in the art will recognize that various changes and modifications of the examples described herein can be made without departing from the spirit and scope of the present disclosure.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.
The invention is described in detail below by reference to the attached drawings and in connection with the embodiments:
Example 1
As shown in fig. 1, an automatic calibration method for detecting the impedance of a neutral electrode of a high-frequency electrotome specifically comprises the following steps:
s1, when a fixed impedance is connected between two neutral electrodes, recording a plurality of first voltages by switching the frequency of an excitation signal source, and taking the frequency generating the maximum first voltage as an optimal resonance frequency;
S2, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
And S3, when the measured voltage obtained by detecting the neutral electrode impedance at the optimal resonance frequency is obtained, carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage.
Preferably, the step S2 specifically includes the following steps:
s21, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes;
S22, establishing a mapping relation between a plurality of preset impedances and corresponding second voltages;
s23, segmenting a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
and S24, performing curve fitting according to the second voltage in the reference interval section and the preset impedance to obtain voltage impedance fitting curves corresponding to the reference interval sections.
Preferably, in S3, the impedance calibration process specifically includes:
The method comprises the steps of obtaining actual measurement voltage obtained by detecting neutral electrode impedance according to optimal resonance frequency and current preset impedance, finding a corresponding reference interval section and a voltage impedance fitting curve thereof according to the actual measurement voltage, substituting the actual measurement voltage into the corresponding voltage impedance fitting curve to calculate the current preset impedance, and readjusting the reference interval section and the voltage impedance fitting curve according to the current preset impedance and the current preset impedance.
Preferably, in S23, the process of performing section segmentation on the plurality of preset impedances to form a plurality of reference section segments including the second voltage and the preset impedances specifically includes:
Sequencing the preset impedances, segmenting the sequenced preset impedances in intervals, and taking two continuous preset impedances as the head parts/tail parts of the reference interval sections respectively, wherein the n sequenced preset impedances are segmented in intervals to form n-1 reference interval sections.
Preferably, in S24, the curve fitting process according to the second voltage and the preset impedance in the reference interval is specifically:
Constructing a fitting formula for each reference interval, wherein the fitting formula is y=ax+b, y is represented as an impedance value, x is represented as a voltage value, and a and b are fitting parameters;
Obtaining a second voltage mapped by the preset impedance positioned at the head and the tail according to the mapping relation between the preset impedance and the second voltage;
Substituting preset impedance at the head and the tail of each reference interval section and corresponding second voltage into a fitting formula to solve unknown coefficients, and solving a and b in the fitting formula to form a voltage impedance fitting curve.
Preferably, in S1, the frequency of the excitation signal source is switched by the controllable PWM to make the excitation signal source output different frequencies, and the frequency generation can realize frequency self-increase according to the step preset frequency.
Preferably, the neutral electrode impedance detection is used for judging the pasting quality of the neutral electrode by detecting the resistance value between two neutral electrodes.
Based on the above principle, the present invention will be further elucidated:
The invention mainly provides an automatic calibration method for detecting the neutral electrode impedance of the high-frequency electric knife during production, as shown in fig. 2, a more accurate calibration value can be obtained according to the automatic calibration method in a first time period and a second time period, and then the calibration value is provided for a customer, so that the customer can have an accurate reference value when using the high-frequency electric knife, the operation of the customer is convenient, and the adhesion quality between neutral electrodes can be rapidly judged.
Specifically, the impedance detection of the neutral electrode of the high-frequency electric knife mainly judges the adhesion quality between two neutral electrodes by detecting the resistance value between two output wire welding holes, the two output wire welding holes are connected with an external double-sheet neutral electrode, as shown in fig. 3, U_rem of C77 is a feedback voltage value, and the resistance value between the welding holes and the frequency value of drive can all influence the value. Choose is a peak detection control signal, choose is a signal, when drive is low, the analog switch is closed, and the peak voltage of the primary side of the transformer is transferred to C77, so that the frequency-voltage can be affected, therefore, the invention needs to calibrate the frequency value first.
In this embodiment, as shown in fig. 4, first, a fixed impedance is connected between two neutral electrodes, and the fixed impedance can be switched by a relay control to connect the fixed impedance to a neutral electrode impedance detection circuit, or the fixed impedance, for example, 200Ω, can be put in by a producer directly through a program prompt.
After the fixed impedance is set, a frequency automatic adjustment link is entered, and different frequencies are generated in the neutral electrode impedance detection loop by switching the frequency of the excitation signal source, wherein the frequencies can be generated by controllable pwm, so that the control module controls the frequency of the excitation signal source to realize frequency self-increase according to the step preset frequency, for example, 0.1khz.
In the frequency self-increasing process, the frequency of the excitation signal source and the first voltage fed back in real time are recorded, and according to the recording result, the influence of the frequency on the voltage can be seen to generate a peak value, as shown in table 1:
TABLE 1
| Frequency khz | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 |
| First voltage v | 0.5 | 0.8 | 1.1 | 1.6 | 2.0 | 2.3 | 2.5 | 2.2 | 1.9 | 1.4 | 1.1 |
The present invention takes the frequency generating the maximum first voltage as the optimal resonance frequency, specifically, the frequency generating the maximum voltage of 2.5v as the optimal resonance frequency, and the optimal resonance frequency is 81khz, thus completing the frequency calibration.
And the optimal resonant frequency can be stored in the flash memory, and the frequency is adjusted in the production process, so that a customer can read the optimal resonant frequency when starting up, and the frequency is used for driving the neutral electrode impedance detection loop, so that the detection accuracy can be improved.
The neutral electrode impedance detection loop is fitted into an external impedance value according to the detected voltage value, so that a fitting formula is arranged in the conventional high-frequency electric knife equipment, a general fitting formula method is to fit a curve after taking an average value according to measurement data of a prototype, and the formula cannot be changed after the program is solidified for each equipment in the same series, so that the fitting curve is inaccurate.
Therefore, the invention carries out curve fitting in the reference interval section based on the optimal resonant frequency, can obtain the realized voltage impedance fitting curve corresponding to different reference interval sections, completes the calibration of the fitting curve, carries out curve fitting on different reference interval sections, can carry out targeted rapid calibration on the detection value by adopting a segmented form, and particularly, the voltage impedance fitting curve mainly aims at the change of the self characteristics of the product, and re-fits the curve, so that the deviation of the impedance detection result caused by element errors is accurately corrected, and can also be used for the correction after the element aging.
In this embodiment, the voltage impedance fitting curve adopts a segmented form, and each segment can be simplified into a straight line without losing accuracy by segmenting the curve, and a fitting formula is y=ax+b, where y is represented as an impedance value, and x is represented as a voltage value. Solving unknown coefficients a and b of each section in the fitting process, so as to obtain voltage impedance fitting curves of different reference section sections, and storing the voltage impedance fitting curves of the different reference section sections into the high-frequency electric knife equipment.
Specifically, when the neutral electrode impedance detection loop is driven by the optimal resonant frequency and the preset impedance, a corresponding reference interval is found by the current measured voltage in a table look-up mode, then the measured voltage is substituted into a voltage impedance fitting curve in the reference interval to be solved, a current calibration impedance is calculated, the current calibration impedance is compared with the current preset impedance, if the difference between the current calibration impedance and the current preset impedance does not exceed a preset threshold value, the current preset impedance meets the current calibration impedance condition, if the difference between the current calibration impedance and the current preset impedance exceeds the preset threshold value, namely the current preset impedance does not meet the current calibration impedance condition, the current preset impedance and the measured voltage are not matched, the current calibration error is larger, the current reference interval can be readjusted, curve fitting is carried out again according to the adjusted reference interval, and the voltage impedance fitting curve is recalibrated.
The process of obtaining the voltage impedance fitting curves of different reference interval sections based on the segmentation mode specifically includes that firstly, the frequency of an excitation signal source is set to be the optimal resonant frequency, then, a plurality of preset impedance values, for example, 10-20-50-80-100-150-180, are set according to the segmentation mode, 6 reference interval sections can be obtained according to 7 preset impedances, then, different preset impedances can be switched and connected through a relay, as shown in fig. 5, the second voltage fed back by each preset impedance at the optimal resonant frequency is recorded, and specifically, as shown in table 2:
TABLE 2
| Preset impedance omega | 10 | 20 | 50 | 80 | 100 | 150 | 180 |
| Second voltage mv | 304 | 508 | 1025 | 1429 | 1675 | 2133 | 2348 |
The second voltage corresponding to each preset impedance can be obtained, curve fitting is performed on each reference interval according to the mapping relation between the preset impedance and the second voltage, for example, the preset impedance at the head and the tail of the first reference interval is respectively 10 and 20, then 10 and 20 and 304 and 508 corresponding to the 10 and 20 are substituted into a fitting formula to solve the unknown coefficient, a=0.049 and b= -4.902 are solved, as shown in fig. 6, a voltage impedance fitting curve is formed, y=0.049 x-4.902, and the voltage impedance fitting curve of each reference interval can be obtained by analogy.
Example 2
An automatic calibration system for high frequency electrotome neutral electrode impedance detection, comprising:
An optimal resonance frequency obtaining module that records a plurality of first voltages by switching the frequency of the excitation signal source when a fixed impedance is connected between the two neutral electrodes, and takes the frequency at which the maximum first voltage is generated as an optimal resonance frequency;
When the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
and the impedance calibration module is used for carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage when the measured voltage obtained by carrying out neutral electrode impedance detection at the optimal resonant frequency is obtained.
Preferably, the voltage impedance fitting curve obtaining module further includes the following submodules:
the second voltage obtaining module records a plurality of second voltages by switching preset impedance connected between the two neutral electrodes when the frequency of the excitation signal source is the optimal resonant frequency;
The impedance voltage mapping module is used for establishing mapping relation between a plurality of preset impedances and corresponding second voltages;
the interval segmentation module is used for carrying out interval segmentation on a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
And the curve fitting module is used for performing curve fitting according to the second voltage and the preset impedance in the reference interval section to obtain voltage impedance fitting curves corresponding to the reference interval sections.
The foregoing description of the preferred embodiment of the invention is not intended to limit the invention in any way, but rather to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. An automatic calibration method for detecting the impedance of a neutral electrode of a high-frequency electrotome, which is characterized by comprising the following steps:
s1, when a fixed impedance is connected between two neutral electrodes, recording a plurality of first voltages by switching the frequency of an excitation signal source, and taking the frequency generating the maximum first voltage as an optimal resonance frequency;
S2, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
the step S2 specifically comprises the following steps:
s21, when the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes;
S22, establishing a mapping relation between a plurality of preset impedances and corresponding second voltages;
s23, segmenting a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
S24, performing curve fitting according to the second voltage in the reference interval section and the preset impedance to obtain voltage impedance fitting curves corresponding to the reference interval sections;
And S3, when the measured voltage obtained by detecting the neutral electrode impedance at the optimal resonance frequency is obtained, carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage.
2. The automatic calibration method for detecting the impedance of the neutral electrode of the high-frequency electric knife according to claim 1, wherein in S3, the impedance calibration process is specifically:
The method comprises the steps of obtaining actual measurement voltage obtained by detecting neutral electrode impedance according to optimal resonance frequency and current preset impedance, finding a corresponding reference interval section and a voltage impedance fitting curve thereof according to the actual measurement voltage, substituting the actual measurement voltage into the corresponding voltage impedance fitting curve to calculate the current preset impedance, and readjusting the reference interval section and the voltage impedance fitting curve according to the current preset impedance and the current preset impedance.
3. The automatic calibration method for detecting the neutral electrode impedance of the high-frequency electric knife according to claim 1, wherein in S23, the process of segmenting the intervals of the preset impedances to form the reference intervals including the second voltage and the preset impedances is specifically as follows:
Sequencing the preset impedances, segmenting the sequenced preset impedances in intervals, and taking two continuous preset impedances as the head parts/tail parts of the reference interval sections respectively, wherein the n sequenced preset impedances are segmented in intervals to form n-1 reference interval sections.
4. An automatic calibration method for detecting neutral electrode impedance of a high frequency electric knife according to claim 3, wherein in S24, the process of performing curve fitting according to the second voltage in the reference interval and the preset impedance is specifically:
Constructing a fitting formula for each reference interval, wherein the fitting formula is y=ax+b, y is represented as an impedance value, x is represented as a voltage value, and a and b are fitting parameters;
Obtaining a second voltage mapped by the preset impedance positioned at the head and the tail according to the mapping relation between the preset impedance and the second voltage;
Substituting preset impedance at the head and the tail of each reference interval section and corresponding second voltage into a fitting formula to solve unknown coefficients, and solving a and b in the fitting formula to form a voltage impedance fitting curve.
5. The automatic calibration method for detecting the impedance of the neutral electrode of the high-frequency electric knife according to claim 1, wherein in the step S1, the frequency of the switching excitation signal source is controlled by PWM to enable the excitation signal source to output different frequencies, and the frequency generation can realize the frequency self-increase according to the step preset frequency.
6. An automatic calibration method for neutral electrode impedance detection of a high-frequency electric knife according to claim 1, wherein the neutral electrode impedance detection is used for judging the adhesion quality of the neutral electrode by detecting the resistance value between two neutral electrodes.
7. An automatic calibration system for neutral electrode impedance detection of a high frequency electrotome, comprising:
An optimal resonance frequency obtaining module that records a plurality of first voltages by switching the frequency of the excitation signal source when a fixed impedance is connected between the two neutral electrodes, and takes the frequency at which the maximum first voltage is generated as an optimal resonance frequency;
When the frequency of the excitation signal source is the optimal resonant frequency, recording a plurality of second voltages by switching preset impedance connected between two neutral electrodes, and performing interval curve fitting according to the mapping relation between the preset impedance and the second voltages to obtain a voltage impedance fitting curve;
the impedance calibration module is used for carrying out impedance calibration on the voltage impedance fitting curve according to the measured voltage when the measured voltage obtained by carrying out neutral electrode impedance detection at the optimal resonance frequency is obtained;
The voltage impedance fitting curve obtaining module further comprises the following submodules:
the second voltage obtaining module records a plurality of second voltages by switching preset impedance connected between the two neutral electrodes when the frequency of the excitation signal source is the optimal resonant frequency;
The impedance voltage mapping module is used for establishing mapping relation between a plurality of preset impedances and corresponding second voltages;
the interval segmentation module is used for carrying out interval segmentation on a plurality of preset impedances to form a plurality of reference interval segments containing second voltage and preset impedances;
And the curve fitting module is used for performing curve fitting according to the second voltage and the preset impedance in the reference interval section to obtain voltage impedance fitting curves corresponding to the reference interval sections.
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| CN118718257B (en) * | 2024-09-03 | 2024-11-26 | 杭州神络医疗科技有限公司 | A contact displacement calibration method, system, device and medium for a neural stimulator |
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| CN107907744A (en) * | 2017-12-08 | 2018-04-13 | 赛诺微医疗科技（浙江）有限公司 | The measuring device and method of electric knife negative plate contact quality |
| CN115993569A (en) * | 2022-12-26 | 2023-04-21 | 广州思林杰科技股份有限公司 | Rapid calibration method and system for LCR tester |
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