Adjusting method and adjusting system of eddy current sensor

Abstract

The invention discloses an adjusting method and an adjusting system for an eddy current sensor, and relates to the technical field of eddy current sensor adjustment, and the adjusting system comprises a data acquisition module, a feature extraction module, a parameter calculation module and an adjustment execution module. According to the invention, multi-dimensional feature extraction is carried out by collecting output signals and combining standard parameters, and the gain and frequency of the sensor are accurately adjusted after adjusting parameters are calculated, so that measured objects with different characteristics can be adapted, the measurement accuracy is effectively improved, and errors are reduced; the sampling frequency of the data acquisition device can be preset according to object characteristics, and the applicability is enhanced; the display module is arranged, so that a user can conveniently monitor and analyze data and parameters of each link in real time, and the measurement condition can be controlled. The communication module communicates with external equipment, so that further processing and storage of data are facilitated, and application expansion is facilitated; on the whole, intelligent adjustment of the eddy current sensor is achieved, and the higher requirements for high-precision measurement and data management at present are met.

Description

Technical Field

[0001] The present invention relates to the technical field of eddy current sensor adjustment, and in particular to an eddy current sensor adjustment method and an eddy current sensor adjustment system. Background Art

[0002] As a non-contact high-precision sensor, eddy current sensors are widely used in many fields such as industrial production, machinery manufacturing, aerospace, etc. For example, they play a key role in the measurement of shaft vibration and displacement of rotating machinery, metal sheet thickness detection, material identification, etc.

[0003] In actual application scenarios, the objects to be measured are diverse and complex. Different objects to be measured have significant differences in physical properties, motion states, working environments, etc. For example, when measuring rotating shafts at different speeds, factors such as the shaft's rotation frequency, surface material, and size specifications will affect the measurement accuracy of the eddy current sensor. Moreover, even for the same type of object to be measured, under different working conditions, such as temperature changes, electromagnetic interference environments, etc., the impact on sensor measurements is not the same.

[0004] Traditional eddy current sensors often use fixed parameter settings when installed and used, such as fixed gain and measurement frequency. This fixed parameter setting is difficult to adapt to various complex and changeable objects and working conditions. When faced with objects with different characteristics, due to unreasonable sensor gain settings, the output signal may be too weak or too strong, and cannot accurately reflect the true state of the object being measured; and if the measurement frequency does not match the movement frequency of the object being measured, it will cause distortion of the measurement data, increase in errors, and even measurement failure. For example, when measuring high-speed rotating shaft parts, if the sensor's measurement frequency is too low, according to the sampling theorem, it will not be possible to accurately obtain the real-time status information of the shaft, resulting in serious deviations in the measurement results, which cannot meet the requirements for high-precision measurement in industrial production.

[0005] Therefore, it is particularly urgent and necessary to develop an eddy current sensor adjustment method and system that can automatically adjust parameters according to the characteristics of the object being measured and has good data interaction function. Summary of the invention

[0006] The purpose of the present invention is to provide an adjustment method and an adjustment system for an eddy current sensor, which solve the technical problems raised in the background technology.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A method for adjusting an eddy current sensor comprises the following steps: Step 1: Data Collection Connecting the eddy current sensor to the data acquisition device, starting the eddy current sensor to measure the object to be measured, collecting the output signal of the eddy current sensor under the initial setting state, and obtaining the known standard parameter value of the object to be measured; Step 2: Feature extraction Perform multi-dimensional feature extraction on the output signal sequence and obtain multiple feature values; Step 3: Parameter Analysis Calculating corresponding adjustment parameters according to multiple feature values ​​extracted from the features and known standard parameter values, and including: a gain adjustment coefficient and a frequency adjustment coefficient; Step 4: Adjust execution The calculated gain adjustment coefficient G j The frequency adjustment coefficient FC is sent to the control center of the eddy current sensor, and the control center then adjusts the sensor.

[0008] As a further solution of the present invention: in the data acquisition step, the output signals are combined into an output signal sequence according to the time trend, and recorded as {S i}, i = 1, 2, ... n, n is the number of sample points set in advance; S i Represents the output signal value corresponding to the i-th sample point in the time series; At the same time, the known standard parameter value of the object being measured is marked as P j , j=1, 2, ...m, m is the number of standard parameters corresponding to different properties of the eddy current sensor.

[0009] As a further solution of the present invention: in the data acquisition step, the sampling frequency of the data acquisition device can be pre-set according to the characteristics of the object to be measured, and the setting range of the sampling frequency is determined according to the motion frequency range of the object to be measured and the measurement accuracy requirements.

[0010] As a further solution of the present invention: the multi-dimensional feature extraction method is as follows: StepA1, output signal mean feature extraction: Calculate the output signal sequence {S i}mean; StepA2: Output signal standard deviation feature extraction: Calculate the output signal sequence {S i}Standard deviation; StepA3: Output signal peak feature extraction: From the output signal sequence {S i} extract the peak value of the output signal; StepA4: Output signal frequency feature extraction: First, the output signal sequence {S i} to perform fast Fourier transform and obtain the spectrum of the output signal, which is recorded as {F t}, t=1, 2, ... k, k is the frequency point number of the spectrum; Then, the frequency corresponding to the maximum amplitude in the spectrum is taken as the main frequency feature of the output signal.

[0011] As a further solution of the present invention: a special digital signal processor or a microcontroller with data processing function is used to calculate the output signal sequence {S i}corresponding mean, standard deviation and peak value.

[0012] As a further solution of the present invention: the gain adjustment coefficient is calculated as follows: pass: Calculate the gain adjustment coefficient G of the eddy current sensor corresponding to different properties j ; Where Sp represents the output signal sequence {S i}, Sb represents the output signal sequence {S i}, Smax represents the standard deviation of the output signal sequence {S i} is the peak value of the output signal in .

[0013] As a further solution of the present invention: the frequency adjustment coefficient is calculated as follows: pass: Calculate the frequency adjustment coefficient FC of the eddy current sensor; Where F0 is the ideal measurement frequency calculated in advance based on the standard parameters of the object being measured, and Fmax is the frequency corresponding to the maximum amplitude in the spectrum.

[0014] As a further solution of the present invention: the adjustment execution mode is as follows: Step C1, the control center adjusts the gain of the corresponding attribute of the sensor according to the gain adjustment coefficient. The adjustment formula is: ; In the formula, G old，j is the current gain value of the corresponding attribute of the sensor, G new，j is the adjusted gain value; Step C2, the control center adjusts the measurement frequency of the sensor according to the frequency adjustment coefficient. The adjustment formula is: ; In the formula, F old is the current measurement frequency of the sensor, F new is the adjusted measurement frequency.

[0015] A regulating system for an eddy current sensor, the system is used to implement a regulating method for an eddy current sensor, the system comprising: Data acquisition module: used to connect the eddy current sensor and the data acquisition device, collect the output signal sequence of the sensor and the standard parameter value of the measured object, and transmit the collected data to the feature extraction module; Feature extraction module: used to receive data from the data acquisition module, calculate the mean, standard deviation, peak value and frequency characteristics of the output signal sequence, and transmit these characteristic values ​​to the parameter calculation module; Parameter calculation module: used to calculate the gain adjustment coefficient and the frequency adjustment coefficient according to the characteristic value transmitted by the characteristic extraction module and the known standard parameter value, and transmit the calculation result to the adjustment execution module; Adjustment execution module: used to receive the adjustment coefficient transmitted by the parameter calculation module and adjust the gain and frequency of the eddy current sensor.

[0016] As a further solution of the present invention: an adjustment system of an eddy current sensor also includes: The display module is used to display the data collected by the data acquisition module, the characteristic values ​​calculated by the characteristic extraction module, the adjustment coefficients calculated by the parameter calculation module, and the sensor parameters adjusted by the adjustment execution module, so as to facilitate user monitoring and analysis.

[0017] As a further solution of the present invention: an adjustment system of an eddy current sensor also includes: The communication module is used to realize data communication with external devices and can transmit the collected data, calculation results, etc. to the remote monitoring center or database for further processing or storage.

[0018] Beneficial effects of the present invention: The present invention improves measurement accuracy by performing multi-dimensional feature extraction on the output signal of the eddy current sensor, including extraction of mean, standard deviation, peak value and frequency characteristics, and calculating the gain adjustment coefficient and the frequency adjustment coefficient in combination with known standard parameter values ​​of the measured object, thereby accurately adjusting the gain and measurement frequency of the sensor, so that the sensor can better adapt to the actual situation of the measured object, effectively reduce measurement errors, improve measurement accuracy, and more accurately obtain relevant parameters of the measured object.

[0019] Adapt to various characteristics of measured objects: The sampling frequency of the data acquisition device can be pre-set according to the characteristics of the measured object, and its setting range is determined according to the motion frequency range and measurement accuracy requirements of the measured object. This enables the adjustment method and system to flexibly adapt to measured objects with various characteristics such as different motion frequencies and different accuracy requirements, thereby enhancing its applicability and versatility.

[0020] Easy to monitor and analyze: A display module is set up to intuitively display the data collected by the data acquisition module, the characteristic values ​​calculated by the feature extraction module, the adjustment coefficients calculated by the parameter calculation module, and the sensor parameters adjusted by the adjustment execution module. This allows users to monitor the entire adjustment process and changes in sensor-related parameters in real time, and is also helpful for subsequent in-depth analysis and summary, timely discovery of potential problems and adoption of countermeasures.

[0021] Facilitates data sharing and further processing: Equipped with a communication module, it can realize data communication with external devices, and can transmit the collected data, calculation results, etc. to the remote monitoring center or other related equipment for further processing or storage, facilitating data integration, sharing, and more complex subsequent operations, such as remote centralized control, big data analysis, etc., expanding the use value of the regulation system in a wider range of application scenarios.

[0022] Automated and intelligent adjustment: The entire adjustment process is completed automatically through the orderly coordination of various modules within the system, from data collection, feature extraction, parameter calculation to adjustment execution. This reduces manual intervention, improves adjustment efficiency, realizes more intelligent adjustment of eddy current sensors, and improves overall work efficiency and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 The system block diagram of the regulating system of an eddy current sensor of the present invention.

[0025] Figure 2 It is a schematic flow chart of an adjustment method of an eddy current sensor of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] See also Figure 2 As shown, the present invention is a method for adjusting an eddy current sensor, comprising the following steps: Step 1: Data Collection First, build a stable and reliable connection link to closely connect the eddy current sensor with a professional data acquisition device to ensure the stability and accuracy of signal transmission; Then, the eddy current sensor is officially started to enter the working state and carry out precise measurement of the pre-selected object to be measured; In this process, the data acquisition device is used to collect the output signal sequence of the eddy current sensor in the initial setting state, and it is recorded as {S i}, i = 1, 2, ... n, n is the number of sample points set in advance; S i Represents the output signal value corresponding to the i-th sample point in the time series; At the same time, through the standard parameter acquisition channel related to the object being measured, the known standard parameter value of the object being measured is accurately obtained and recorded as P j , j = 1, 2, ... m, m is the number of standard parameters corresponding to different properties of the eddy current sensor; In this embodiment, the measurement of shaft parts is used as an example to illustrate the distance. When j=1, P j represents the standard diameter value of the shaft, which is crucial for the subsequent calculation of the distance relationship between the sensor and the shaft surface; when j=2, P j It is the standard speed value of the shaft, which is closely related to the matching adjustment of the sensor measurement frequency, etc. These known standard parameter values ​​provide an indispensable benchmark for subsequent precise adjustment calculations; Step 2: Feature extraction StepA1, output signal mean feature extraction: Calculate the output signal sequence {S i}mean; The calculation formula is: ; Where Sp represents the output signal sequence {S i}mean; In this embodiment, the mean value can reflect the average amplitude of the signal sequence at the overall level and is an important indicator for measuring the central tendency of the signal; For example, in the vibration measurement of shaft parts, if the mean value changes significantly, it may indicate that the overall operating state of the shaft is abnormal or that the initial gain setting of the sensor is unreasonable; StepA2: Output signal standard deviation feature extraction: Calculate the output signal sequence {S i}Standard deviation; The calculation formula is: ; Where Sb represents the output signal sequence {S i}Standard deviation; In this embodiment, the standard deviation is used to characterize the degree of dispersion of the signal sequence relative to the mean. The larger the standard deviation, the more drastic the fluctuation amplitude of the signal, which may be due to unstable vibration of the measured object or the existence of external interference factors. In eddy current sensor measurement, the standard deviation can help determine the stability of the measurement environment and the sensitivity of the sensor to small changes. StepA3: Output signal peak feature extraction: From the output signal sequence {S i} extract the peak value of the output signal; The calculation formula is: ; Where Smax represents the output signal sequence {S i}The peak value of the output signal; In this embodiment, the peak value represents the maximum amplitude value in the signal sequence; For example, in the displacement measurement of shaft parts, the peak value may correspond to the maximum displacement position of the shaft. By comparing it with the travel range of the shaft in the standard parameters, it can be preliminarily determined whether the measurement range of the sensor is appropriate and whether the gain needs to be adjusted; Step 3: Parameter Analysis Calculating a gain adjustment coefficient based on a plurality of feature values ​​extracted from the features and known standard parameter values; The specific method is as follows: pass: ; Calculate the gain adjustment coefficient G of the eddy current sensor corresponding to different properties j ; In this embodiment, when the value of j is 1, The ratio is understood as adjusting the gain according to the relationship between the standard shaft diameter and the actual measurement signal peak value, so that the sensor can measure the shaft size more accurately; The ratio of further considers the relationship between the discrete degree and the average level of the signal, and comprehensively optimizes the gain setting; For example, if If the actual measured signal is smaller than the signal corresponding to the standard shaft diameter, the gain may need to be increased. A larger value means that the signal fluctuates greatly, and the gain may need to be adjusted appropriately to balance the stability and sensitivity of the signal.

[0029] Step 4: Adjust execution The calculated gain adjustment coefficient G j The sensor is sent to the control center, which then adjusts and executes the sensor. The specific method is as follows: The control center adjusts the gain of the corresponding attribute of the sensor according to the gain adjustment coefficient. The adjustment formula is: ; In the formula, G old，j is the current gain value of the corresponding attribute of the sensor, G new，j is the adjusted gain value; In this embodiment, in this way, the gain of the sensor can be accurately adjusted according to the gain adjustment coefficient obtained by previous calculation, so as to adapt it to the characteristics of the measured object and the requirements of the measurement environment.

[0030] This embodiment collects the output signal of the eddy current sensor in the initial setting state, and combines the standard parameter values ​​of the object to be measured to perform multi-dimensional feature extraction and gain adjustment coefficient calculation, and then adjusts the gain of the corresponding attribute of the sensor according to the calculation result, so that the sensor can better adapt to the characteristics of the object to be measured, reduce the measurement error caused by factors such as unreasonable initial settings, and improve the measurement accuracy. For example, in different measurement scenarios of shaft parts, the gain can be optimized based on relevant features to ensure measurement accuracy; the extraction of characteristic values ​​such as the mean, standard deviation, and peak value of the output signal not only serves the gain adjustment, but also can reflect some situations in the measurement process. For example, the change of the mean value can indicate the operating status of the shaft or the problem of sensor gain setting, and the standard deviation can reflect the stability of the measurement environment and the sensitivity of the sensor, which is helpful to timely discover potential problems and carry out targeted processing.

[0031] Embodiment 2 As the second embodiment of the present invention, when the present application is implemented, compared with the first embodiment, the technical solution of the present embodiment is different from that of the first embodiment only in that, The feature extraction step also includes output signal frequency feature extraction: First, the output signal sequence {S i} to perform fast Fourier transform and obtain the spectrum of the output signal, which is recorded as {F t}, t=1, 2, ... k, k is the frequency point number of the spectrum; Then, the frequency corresponding to the maximum amplitude in the spectrum is taken as the main frequency feature of the output signal and recorded as Fmax; In this embodiment, in the rotation measurement of shaft parts, Fmax is closely related to the rotation frequency of the shaft. If the two do not match, inaccurate measurement data may result. Therefore, the measurement frequency of the sensor needs to be adjusted according to information such as the shaft rotation speed in the standard parameters. The parameter analysis step also calculates the frequency adjustment coefficient based on the main frequency eigenvalues ​​extracted from the features; The specific method is as follows: pass: ; Calculate the frequency adjustment coefficient FC of the eddy current sensor; Where F0 is the ideal measurement frequency calculated in advance based on the standard parameters of the object being measured; In this embodiment, for the rotation measurement of shaft parts, the F0 and Fmax shaft speeds are closely related to the sampling theorem required for the measurement; For example, according to the sampling theorem, the sampling frequency should be at least twice the highest frequency of the measured signal. In the rotation measurement of the shaft, F0 can be calculated based on the shaft speed. If F0 does not match, the measurement frequency of the sensor is adjusted through the frequency adjustment coefficient to ensure the accuracy and integrity of the measurement data. The adjustment execution is also used to send the calculated frequency adjustment coefficient FC to the control center of the eddy current sensor, and then the control center performs adjustment execution on the sensor; The specific method is as follows: The control center adjusts the measurement frequency of the sensor according to the frequency adjustment coefficient. The adjustment formula is: ; In the formula, F old is the current measurement frequency of the sensor, F new is the adjusted measurement frequency; In this embodiment, it can be ensured that the measurement frequency of the sensor matches the actual movement frequency or characteristic frequency of the measured object, thereby improving the accuracy and reliability of the measurement.

[0032] This embodiment adds the extraction of output signal frequency characteristics and the calculation and execution of the corresponding frequency adjustment coefficient on the basis of the first embodiment. In the scene of the rotation measurement of shaft parts, the frequency adjustment coefficient can be used to accurately adjust the measurement frequency of the sensor according to the comparison between the standard parameters such as the shaft speed and the actual measured frequency characteristics to ensure that it matches the actual movement frequency of the measured object, thereby further improving the accuracy and integrity of the measurement data. In particular, for the measured objects with rotation characteristics, the frequency factor is considered for adjustment, so that the sensor can better adapt to the measurement requirements of such objects, expanding the applicability of the sensor in different types of measurement scenarios.

[0033] Embodiment 3 As the third embodiment of the present invention, when the present application is implemented, compared with the first and second embodiments, the technical solution of this embodiment is to combine the solutions of the first and second embodiments; See also Figure 1 As shown, in this embodiment, the present invention also provides an eddy current sensor adjustment system, which is used to implement an eddy current sensor adjustment method, and the system includes: The data acquisition module is responsible for building the physical connection and data transmission channel between the eddy current sensor and the data acquisition device; Its interface circuit can ensure that the weak signal output by the sensor can be accurately received and converted by the data acquisition device; During the data collection process, the output signal sequence of the sensor is efficiently collected in strict accordance with the pre-set sampling frequency and number of sampling points, and the standard parameter value of the measured object is accurately obtained through a dedicated communication interface or data reading line; The rich data collected will be transmitted to the feature extraction module in a timely and stable manner, laying a solid foundation for subsequent data analysis and processing; The feature extraction module, as one of the core data processing units of the entire regulation system, has the main function of receiving massive raw data transmitted by the data acquisition module; Then, according to the pre-written and optimized algorithm program, the mean, standard deviation, peak value and frequency characteristics of the signal sequence are accurately calculated; During the calculation process, full use is made of high-performance digital signal processing chips or specialized computing units to ensure the accuracy and efficiency of the calculation. The key characteristic values ​​calculated will be quickly transmitted to the parameter calculation module to provide indispensable data support for subsequent adjustment parameter calculations; The parameter calculation module, whose main task is to accurately calculate the gain adjustment coefficient and frequency adjustment coefficient according to the established, scientific and reasonable parameter calculation algorithm formula based on the rich feature values ​​transmitted by the feature extraction module and the known standard parameter values; During the calculation process, the various standard parameters of the measured object and the various characteristics of the sensor output signal are comprehensively considered, and the most appropriate adjustment coefficient is obtained through complex and rigorous mathematical operations and logical judgments. After the calculation is completed, these key adjustment coefficients are promptly transmitted to the adjustment execution module to drive subsequent adjustment actions; The adjustment execution module, as the final execution module of the control center, is responsible for receiving the precise adjustment coefficient transmitted by the parameter calculation module; Once these coefficients are received, the gain and frequency adjustment procedure for the eddy-current sensor is immediately initiated; In terms of gain adjustment, strictly follow the formula and use high-precision gain adjustment circuit to accurately adjust the gain of the sensor; In terms of frequency adjustment, the measurement frequency of the sensor is accurately adjusted based on the formula through advanced frequency synthesis technology or frequency adjustment circuit; Through this series of operations, the eddy current sensor can be precisely adjusted, so that it can perform high-precision measurements on objects with different characteristics in complex and changeable measurement environments. This embodiment integrates the solutions of embodiment one and embodiment two, covering the complete process from data acquisition, multi-dimensional feature extraction to gain adjustment coefficient, frequency adjustment coefficient calculation and corresponding adjustment execution. Through the collaborative work of various modules, comprehensive consideration of various standard parameters of the object under test and various characteristics of the sensor output signal can be made to comprehensively and accurately adjust the eddy current sensor, so that it can achieve high-precision measurement of objects under test with different characteristics in a complex and changeable measurement environment; each module has a clear division of labor, the data acquisition module can accurately collect and transmit data, the feature extraction module uses high-performance processing chips to ensure accurate and efficient characteristic value calculation, the parameter calculation module rigorously calculates and obtains the appropriate adjustment coefficient, and the adjustment execution module accurately adjusts, which overall ensures the reliable and orderly progress of the adjustment process.

[0034] Embodiment 4 As the fourth embodiment of the present invention, when the present application is implemented, compared with the adjustment system of an eddy current sensor provided in the third embodiment, the difference between the present embodiment and the third embodiment is that the adjustment system of an eddy current sensor further includes: The display module is used to display the data collected by the data acquisition module, the characteristic values ​​calculated by the characteristic extraction module, the adjustment coefficients calculated by the parameter calculation module, and the sensor parameters adjusted by the adjustment execution module, so as to facilitate user monitoring and analysis.

[0035] The communication module is used to realize data communication with external devices, and can transmit the collected data, calculation results, etc. to the remote monitoring center or other related equipment for further processing or storage.

[0036] The display module added in this embodiment can intuitively present the data and parameters of each stage of data collection, feature extraction, parameter calculation and adjustment execution, so that users can grasp the sensor adjustment process and related parameter changes in real time, find abnormalities in time, analyze the adjustment effect, and help to better control the measurement work; the communication module realizes data communication with external devices, and can transmit the collected data, calculation results, etc. to the remote monitoring center or other related equipment, which is convenient for further processing, storage and data integration and sharing, laying the foundation for subsequent big data analysis, remote centralized control and other expanded application scenarios, and improving the overall use value of the system.

[0037] Embodiment 5 As the fifth embodiment of the present invention, when the present application is specifically implemented, compared with the first, second, third and fourth embodiments, the technical solution of this embodiment is to combine and implement the solutions of the above-mentioned first, second, third and fourth embodiments.

[0038] This embodiment combines and implements the solutions of the previous embodiments, and has all the beneficial effects of improving measurement accuracy, optimizing measurement frequency matching, achieving comprehensive and precise adjustment, facilitating monitoring and analysis, and facilitating data sharing and expanding applications, forming an overall eddy current sensor adjustment solution that is complete in functions, highly applicable, and can efficiently cope with a variety of complex measurement needs and is easy to manage and expand, maximizing the advantages of each function and ensuring high-quality measurement work.

[0039] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0040] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for adjusting an eddy current sensor, characterized in that: The following steps are involved: Step 1: Data Collection Connecting the eddy current sensor to the data acquisition device, starting the eddy current sensor to measure the object to be measured, collecting the output signal of the eddy current sensor under the initial setting state, and obtaining the known standard parameter value of the object to be measured; Step 2: Feature extraction Perform multi-dimensional feature extraction on the output signal sequence and obtain multiple feature values; Step 3: Parameter Analysis Calculate corresponding adjustment parameters according to multiple feature values ​​extracted from the features and known standard parameter values; Step 4: Adjust execution The calculated adjustment coefficient is sent to the control center of the eddy current sensor, and the control center then adjusts the sensor.

2. The method for adjusting an eddy current sensor according to claim 1, characterized in that: In the data acquisition step, the output signals are organized into output signal sequences according to the time trend and recorded as {S i }, i = 1, 2, ... n, n is the number of sample points set in advance; S i Represents the output signal value corresponding to the i-th sample point in the time series; At the same time, the known standard parameter value of the object being measured is marked as P j , j=1, 2, ...m, m is the number of standard parameters corresponding to different properties of the eddy current sensor.

3. The method for adjusting an eddy current sensor according to claim 2, characterized in that: The multi-dimensional feature extraction method is as follows: StepA1, output signal mean feature extraction: Calculate the output signal sequence {S i }mean; StepA2: Output signal standard deviation feature extraction: Calculate the output signal sequence {S i }Standard deviation; StepA3: Output signal peak feature extraction: From the output signal sequence {S i } extract the peak value of the output signal; StepA4: Output signal frequency feature extraction: First, the output signal sequence {S i } to perform fast Fourier transform and obtain the spectrum of the output signal, which is recorded as {F t }, t=1, 2, ... k, k is the frequency point number of the spectrum; Then, the frequency corresponding to the maximum amplitude in the spectrum is taken as the main frequency feature of the output signal.

4. The method for adjusting an eddy current sensor according to claim 3, characterized in that: The adjustment parameters obtained in the parameter analysis step include: a gain adjustment coefficient and a frequency adjustment coefficient.

5. The method for adjusting an eddy current sensor according to claim 4, characterized in that: The gain adjustment factor is calculated as follows: pass: Calculate the gain adjustment coefficient G of the eddy current sensor corresponding to different properties j ; Where Sp represents the output signal sequence {S i }, Sb represents the output signal sequence {S i }, Smax represents the standard deviation of the output signal sequence {S i } is the peak value of the output signal in .

6. The method for adjusting an eddy current sensor according to claim 5, characterized in that: The frequency adjustment factor is calculated as follows: pass: Calculate the frequency adjustment coefficient FC of the eddy current sensor; Where F0 is the ideal measurement frequency calculated in advance based on the standard parameters of the object being measured, and Fmax is the frequency corresponding to the maximum amplitude in the spectrum.

7. The method for adjusting an eddy current sensor according to claim 6, characterized in that: The adjustment is performed as follows: Step C1, the control center adjusts the gain of the corresponding attribute of the sensor according to the gain adjustment coefficient. The adjustment formula is: In the formula, G old，j is the current gain value of the corresponding attribute of the sensor, G new，j is the adjusted gain value; Step C2, the control center adjusts the measurement frequency of the sensor according to the frequency adjustment coefficient. The adjustment formula is: In the formula, F old is the current measurement frequency of the sensor, F new is the adjusted measurement frequency.

8. An eddy current sensor adjustment system, the system being used to implement an eddy current sensor adjustment method according to any one of claims 1 to 7, characterized in that: The system includes: Data acquisition module: used to connect the eddy current sensor and the data acquisition device, collect the output signal sequence of the sensor and the standard parameter value of the measured object, and transmit the collected data to the feature extraction module; Feature extraction module: used to receive data from the data acquisition module, calculate the mean, standard deviation, peak value and frequency characteristics of the output signal sequence, and transmit these characteristic values ​​to the parameter calculation module; Parameter calculation module: used to calculate the gain adjustment coefficient and the frequency adjustment coefficient according to the characteristic value transmitted by the characteristic extraction module and the known standard parameter value, and transmit the calculation result to the adjustment execution module; Adjustment execution module: used to receive the adjustment coefficient transmitted by the parameter calculation module and adjust the gain and frequency of the eddy current sensor.

9. The adjustment system of an eddy current sensor according to claim 8, characterized in that: Also includes: The display module is used to display the data collected by the data acquisition module, the characteristic values ​​calculated by the characteristic extraction module, the adjustment coefficients calculated by the parameter calculation module, and the sensor parameters adjusted by the adjustment execution module.

10. The adjustment system of an eddy current sensor according to claim 8, characterized in that: Also includes: The communication module is used for data communication with external devices and transmitting the collected data and calculation results to the remote monitoring center or database for processing or storage.

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