A deformation monitoring method and system for a magnetic material

Abstract

The present invention relates to the field of deformation monitoring, and particularly to a method and system for monitoring the deformation of magnetic materials. The method first obtains the magnetization curves and deformation amounts of each magnetic material in the same production batch, and uniformly selects a plurality of positions to be measured on the horizontal axis of the coordinate system. According to the distribution of the magnetic induction intensity and the distribution of the deformation amount at the target positions to be measured of the reference magnetic material of the target magnetic material, the deformation evaluation ability of the magnetization curve of the target magnetic material at the target positions to be measured is obtained. Furthermore, the importance of each position to be measured is analyzed, and key positions to be measured are screened out from all the positions to be measured. Based on the magnetic field intensity and magnetic induction intensity of the magnetization curves of each magnetic material at the key positions to be measured, and the deformation amounts of each magnetic material, a deformation monitoring model is constructed, and the deformation monitoring model is used to monitor the deformation of the magnetic materials to be monitored. The present invention can improve the accuracy of monitoring the deformation of magnetic materials.

Description

Technical Field

[0001] The present invention relates to the field of deformation monitoring, and particularly to a method and system for monitoring the deformation of magnetic materials. Background Art

[0002] Magnetic materials refer to material substances that can generate magnetism under the action of an external magnetic field. Magnetic materials play a key role in many scientific and technological fields and industrial applications. Monitoring and analyzing the deformation of magnetic materials is of great significance for understanding their performance, optimizing their applications, and ensuring their stability.

[0003] When a magnetic material undergoes deformation, the magnetic field strength and magnetic induction intensity at certain positions on the magnetization curve of the magnetic material will change. Therefore, in related technologies, the deformation of the magnetic material is usually monitored by combining the magnetic field strength and magnetic induction intensity at each position on the magnetization curve of the magnetic material. However, since the magnetic field strength and magnetic induction intensity at different positions on the magnetization curve have different degrees of importance for reflecting the deformation of the magnetic material, the existing methods cannot accurately monitor the deformation of the magnetic material, reducing the accuracy of the deformation monitoring of the magnetic material. Summary of the Invention

[0004] In order to solve the technical problem that the existing methods cannot accurately monitor the deformation of magnetic materials and reduce the accuracy of the deformation monitoring of magnetic materials, the purpose of the present invention is to provide a method and system for monitoring the deformation of magnetic materials, and the specific technical solutions adopted are as follows:

[0005] The present invention proposes a method for monitoring the deformation of magnetic materials, and the method includes:

[0006] Obtain the magnetization curve and deformation amount of each magnetic material in the same production batch. The horizontal axis of the coordinate system of the magnetization curve is the magnetic field strength, and the vertical axis is the magnetic induction intensity, and a plurality of positions to be measured are uniformly selected on the horizontal axis of the coordinate system;

[0007] Take any one magnetic material as the target magnetic material, and obtain the reference magnetic material of the target magnetic material according to the deformation amount of the target magnetic material. Take any one position to be measured as the target position to be measured, and obtain the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured according to the distribution of the magnetic induction intensity of the magnetization curves of all the reference magnetic materials of the target magnetic material at the target position to be measured and the distribution of the deformation amounts of all the reference magnetic materials;

[0008] According to the distribution of the magnetic induction intensity at the target position to be measured for the magnetization curves of all magnetic materials and the distribution of the deformation amounts of all magnetic materials, obtain the initial deformation correlation degree at the target position to be measured; use non-zero natural numbers to label each magnetic material to obtain the serial number of each magnetic material, and adjust the initial deformation correlation degree according to the magnetic induction intensity and the deformation evaluation ability at the target position to be measured for the magnetization curves of all magnetic materials, the deformation amounts of all magnetic materials and the serial numbers, to obtain the true deformation correlation degree at the target position to be measured; according to the distribution of the deformation amounts of all the reference magnetic materials of each magnetic material and the distribution of the deformation amounts of all magnetic materials, obtain the possibility of non-deformation characteristics at the target position to be measured; based on the possibility of non-deformation characteristics and the true deformation correlation degree, screen out the key positions to be measured from all the positions to be measured;

[0009] Based on the magnetic field intensity and the magnetic induction intensity at the key positions to be measured for the magnetization curves of each magnetic material, and the deformation amounts of each magnetic material, construct a deformation monitoring model, and use the deformation monitoring model to monitor the deformation of the magnetic materials to be monitored.

[0010] Further, the obtaining of the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured includes:

[0011] Perform a negatively correlated normalization process on the standard deviation of the magnetic induction intensity at the target position to be measured for the magnetization curves of all the reference magnetic materials of the target magnetic material, to obtain the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured;

[0012] Take the standard deviation of the deformation amounts of all the reference magnetic materials of the target magnetic material as the deformation fluctuation degree of the target magnetic material;

[0013] Take the sequence composed of the deformation evaluation indexes at the target position to be measured for the magnetization curves of all magnetic materials as the deformation evaluation index sequence at the target position to be measured, and take the sequence composed of the deformation fluctuation degrees of all magnetic materials as the deformation fluctuation degree sequence, where the elements at the same position in the deformation evaluation index sequence and the deformation fluctuation degree sequence correspond to the same magnetic material;

[0014] Based on the calculation formula of the deformation evaluation weight, obtain the deformation evaluation weight at the target position to be measured, and the calculation formula of the deformation evaluation weight is:

[0015]

[0016] where, represents the deformation evaluation weight at the target position to be measured; represents the deformation evaluation index sequence at the target position to be measured; represents the sequence of deformation fluctuation degrees; represents the Pearson correlation coefficient between the sequence of deformation evaluation indexes and the sequence of deformation fluctuation degrees at the target position to be measured;

[0017] Take the product value of the deformation evaluation weight at the target position to be measured and the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured as the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured.

[0018] Further, the obtaining of the initial deformation correlation degree at the target position to be measured includes:

[0019] Obtain the probability distribution column of the magnetic induction intensity of the magnetization curves of all magnetic materials at the target position to be measured, and in this probability distribution column, arrange the probability values of each magnetic induction intensity in ascending order of magnetic induction intensity, and the obtained sequence is used as the first probability value sequence at the target position to be measured;

[0020] Obtain the probability distribution column of the deformation amounts of all magnetic materials, and in this probability distribution column, arrange the probability values of each deformation amount in ascending order of deformation amount, and the obtained sequence is used as the second probability value sequence;

[0021] Input the first probability value sequence and the second probability value sequence at the target position to be measured into the dynamic time warping algorithm, and perform negative correlation mapping on the output result of the dynamic time warping algorithm to obtain the initial deformation correlation degree at the target position to be measured.

[0022] Further, the obtaining of the true deformation correlation degree at the target position to be measured includes:

[0023] Arrange the serial numbers of all magnetic materials in descending order of the deformation amounts of the magnetic materials, and the obtained sequence is used as the first serial number sequence;

[0024] Arrange the serial numbers of all magnetic materials in ascending order of the magnetic induction intensity of the magnetization curves of the magnetic materials at the target position to be measured, and the obtained sequence is used as the second serial number sequence at the target position to be measured;

[0025] If the serial numbers at the same positions in the first serial number sequence and the second serial number sequence are the same, then mark the serial numbers at this position in the first serial number sequence and the second serial number sequence respectively, take the number of the marked serial numbers in the first serial number sequence as the numerator, take the number of all serial numbers in the first serial number sequence as the denominator, and take the ratio as the first similarity degree at the target position to be measured;

[0026] Delete the marked serial numbers in the first serial number sequence, and use the sequence after deletion as the first default serial number sequence of the target position to be measured. Replace the serial number at each position in the first default serial number sequence with the deformation evaluation ability of the magnetization curve of the corresponding magnetic material at the target position to be measured, and use the sequence after replacement as the first deformation evaluation ability sequence of the target position to be measured;

[0027] Delete the marked serial numbers in the second serial number sequence, and use the sequence after deletion as the second default serial number sequence. Replace the serial number at each position in the second default serial number sequence with the deformation evaluation ability of the magnetization curve of the corresponding magnetic material at the target position to be measured, and use the sequence after replacement as the second deformation evaluation ability sequence;

[0028] Take the cosine similarity between the first deformation evaluation ability sequence and the second deformation evaluation ability sequence of the target position to be measured as the second similarity degree of the target position to be measured;

[0029] Based on the calculation formula of the deformation correlation degree weight, obtain the deformation correlation degree weight of the target position to be measured. The calculation formula of the deformation correlation degree weight is:

[0030]

[0031] where, represents the deformation correlation degree weight of the target position to be measured; represents the first similarity degree of the target position to be measured; represents the second similarity degree of the target position to be measured;

[0032] Take the product value of the deformation correlation degree weight and the initial deformation correlation degree of the target position to be measured as the true deformation correlation degree of the target position to be measured.

[0033] Further, the obtaining of the non-deformation feature possibility of the target position to be measured includes:

[0034] Using the method for obtaining the second probability value sequence, based on the distribution of the deformation amounts of all the reference magnetic materials of the target magnetic material, obtain the third probability value sequence of the target magnetic material;

[0035] Input the third probability value sequence and the second probability value sequence of the target magnetic material into the dynamic time warping algorithm, and take the output result of the dynamic time warping algorithm as the deformation distribution error of the target magnetic material;

[0036] Perform a negative correlation mapping on the average value of the deformation distribution errors of all magnetic materials to obtain the non-deformation feature possibility of the target position to be measured.

[0037] Further, screening out the key positions to be measured from all the positions to be measured includes:

[0038] Taking the true deformation correlation degree of each position to be measured as the numerator, taking the non-deformation feature possibility of each position to be measured as the denominator, and normalizing the ratio value to obtain the deformation evaluation importance of each position to be measured.

[0039] Taking the positions to be measured with the deformation evaluation importance greater than the preset importance threshold as the key positions to be measured.

[0040] Further, constructing the deformation monitoring model includes:

[0041] Inputting the two-dimensional data composed of the magnetic field intensity and the magnetic induction intensity at each key position to be measured of the magnetization curves of each magnetic material and the deformation amount of each magnetic material into the PLS algorithm for processing to obtain the deformation monitoring model.

[0042] Further, performing deformation monitoring on the magnetic material to be monitored includes:

[0043] Obtaining the magnetization curve of the magnetic material to be monitored, inputting the two-dimensional data composed of the magnetic field intensity and the magnetic induction intensity at each key position to be measured of the magnetization curve of the magnetic material to be monitored into the deformation monitoring model, and outputting the deformation amount of the magnetic material to be monitored by the deformation monitoring model.

[0044] Further, obtaining the reference magnetic material of the target magnetic material includes:

[0045] Setting the deformation similarity range of the target magnetic material, and the deformation similarity range is , where represents the deformation amount of the target magnetic material; represents the preset limit value, The value range of ;

[0046] Taking the other magnetic materials except the target magnetic material and whose deformation amounts belong to the deformation similarity range of the target magnetic material as the reference magnetic material of the target magnetic material.

[0047] The present invention also provides a deformation monitoring system for magnetic materials. The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of any one of the deformation monitoring methods for magnetic materials are implemented.

[0048] The present invention has the following beneficial effects:

[0049] In view of the fact that the existing methods cannot accurately monitor the deformation of magnetic materials, reducing the accuracy of deformation monitoring of magnetic materials, this invention first obtains the magnetization curves and deformation amounts of each magnetic material in the same production batch, and uniformly selects multiple positions to be measured on the horizontal axis of the coordinate system. Then, it screens out reference magnetic materials with deformation amounts similar to that of the target magnetic material. Subsequently, based on the magnetic induction intensity of the reference magnetic materials at the target positions to be measured and the deformation amounts of the reference magnetic materials, it can accurately analyze the importance of the target positions to be measured for evaluating magnetic materials. Since the deformation amounts of the reference magnetic materials and the target magnetic material are relatively close, if the data of the magnetization curve of the target magnetic material at the target position to be measured has a strong ability to evaluate deformation, then the similarity of the magnetic induction intensities of the reference magnetic materials at the target position to be measured is also strong. At the same time, considering the normal deformation difference phenomenon among the reference magnetic materials, and the existence of deformation differences will affect the analysis accuracy of the similarity of magnetic induction intensities, so the ability of the data of the magnetization curve of the target magnetic material at the target position to be measured to evaluate the deformation situation can be reflected by the deformation evaluation ability, and the degree of association between the data of the magnetization curves of all magnetic materials at the target position to be measured and the deformation of the magnetic materials can be initially reflected by the initial deformation correlation degree, and further adjust the initial deformation correlation degree to further improve the accuracy of the analysis. And the possibility that the characteristics reflected by the magnetization curve data at the target position to be measured are not deformation characteristics is reflected by the non-deformation feature possibility. Then, it screens out the key positions to be measured that are more important for evaluating and monitoring the deformation situation, and accurately constructs a deformation monitoring model to accurately monitor the deformation situation of the magnetic materials to be monitored, improving the accuracy of deformation monitoring of magnetic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 It is a flowchart of a method for monitoring the deformation of magnetic materials provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manner, structure, features, and effects of a deformation monitoring method and system for a magnetic material proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0054] The following specifically describes the specific solutions of a deformation monitoring method and system for a magnetic material provided by the present invention in conjunction with the accompanying drawings.

[0055] Please refer to Figure 1 , which shows a flowchart of a deformation monitoring method for a magnetic material provided by an embodiment of the present invention. The method includes:

[0056] Step S1: Obtain the magnetization curve and deformation amount of each magnetic material in the same production batch. The horizontal axis of the coordinate system of the magnetization curve is the magnetic field strength, and the vertical axis is the magnetic induction intensity. Then, a plurality of measurement positions are evenly selected on the horizontal axis of the coordinate system.

[0057] In the embodiment of the present invention, first, a plurality of magnetic materials in the same production batch are selected to ensure that the external environment is consistent and the specifications of the produced magnetic materials are consistent. Subsequently, the selected magnetic materials can be regarded as samples for analysis. Then, stress analysis, strain analysis, and structural analysis are performed on these magnetic materials to obtain the deformation amount of each magnetic material. Among them, the method for obtaining the deformation amount is a well-known technical means for those skilled in the art and will not be elaborated here.

[0058] At the same time, the embodiment of the present invention also needs to perform a VSM test on each magnetic material to obtain the magnetic induction intensity of each magnetic material at different magnetic field strengths, and use existing extrapolation fitting and other methods to fit the magnetic induction intensity of each magnetic material at different magnetic field strengths to obtain the magnetization curve of each magnetic material. The magnetization curves of all magnetic materials are located in the same coordinate system. The horizontal axis of the coordinate system of the magnetization curve is the magnetic field strength, and the vertical axis is the magnetic induction intensity. Then, a plurality of measurement positions are evenly selected on the horizontal axis of the coordinate system. Among them, each measurement position corresponds to a magnetic field strength, and the magnetization curve of a specific magnetic material corresponds to a magnetic induction intensity at each measurement position.

[0059] It should be noted that at the selected measurement positions, the key points of the magnetization curve should be included as much as possible, such as the extreme points of the magnetization curve and the intersection points between the magnetization curves, etc., to improve the accuracy of subsequent analysis.

[0060] Step S2: Take any magnetic material as the target magnetic material. According to the deformation amount of the target magnetic material, obtain the reference magnetic material of the target magnetic material. Take any position to be measured as the target position to be measured. According to the distribution of the magnetic induction intensity of all the reference magnetic materials of the target magnetic material at the target position to be measured and the distribution of the deformation amounts of all the reference magnetic materials, obtain the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured.

[0061] First, analyze any magnetic material. Take any magnetic material as the target magnetic material. Then, according to the deformation amount of the target magnetic material, screen out the reference magnetic materials with deformation amounts similar to that of the target magnetic material from other magnetic materials. Subsequently, based on the magnetic induction intensity of the reference magnetic materials at the target position to be measured and the deformation amounts of the reference magnetic materials, accurately analyze the importance of the target position to be measured for evaluating the magnetic material.

[0062] Preferably, in an embodiment of the present invention, the method for obtaining the reference magnetic material of the target magnetic material specifically includes:

[0063] First, set the deformation similarity range of the target magnetic material. The deformation similarity range is , where represents the deformation amount of the target magnetic material; represents the preset limit value, ranges from . In an embodiment of the present invention, is set to 0.1. The specific value of

[0064] can also be set by the implementer according to the specific implementation scenario and is not limited herein.

[0065] Since the magnetization curves of different magnetic materials have different abilities to evaluate deformation at the same position to be measured, any position to be measured is first taken as the target position to be measured. The deformation amounts of the reference magnetic material and the target magnetic material are relatively close. If the magnetization curve of the target magnetic material has a strong ability to evaluate deformation at the target position to be measured, the similarity of the magnetic induction intensities of the reference magnetic materials at the target position to be measured is also relatively high. At the same time, considering that the deformations of each magnetic material are different, there is a normal deformation difference phenomenon among the reference magnetic materials of the target magnetic material. This normal deformation difference phenomenon will affect the analysis accuracy of the similarity of the magnetic induction intensities. For example, if the similarity of the magnetic induction intensities of the reference magnetic materials at the target position to be measured is relatively high, but the deformation differences among the reference magnetic materials are relatively large, it will lead to a lower accuracy in analyzing the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured. Therefore, in the embodiment of the present invention, the distribution of the magnetic induction intensities of the magnetization curves of all the reference magnetic materials of the target magnetic material at the target position to be measured is analyzed, and at the same time, in combination with the distribution of the deformation amounts of all the reference magnetic materials, the deformation evaluation ability obtained reflects the ability of the magnetization curve of the target magnetic material at the target position to be measured to evaluate the deformation situation. The greater the deformation evaluation ability, the stronger the ability of the magnetic field intensity and the magnetic induction intensity of the magnetization curve of the target magnetic material at the target position to be measured to evaluate its own deformation situation, providing a data basis for subsequent analysis of the importance of the target position to be measured.

[0066] Preferably, in an embodiment of the present invention, the method for obtaining the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured specifically includes:

[0067] First, perform a negative correlation normalization process on the standard deviation of the magnetic induction intensities of the magnetization curves of all the reference magnetic materials of the target magnetic material at the target position to be measured, and obtain the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured. The greater the deformation evaluation index, the stronger the ability of the magnetization curve of the target magnetic material at the target position to be measured to evaluate the deformation situation.

[0068] In the embodiment of the present invention, a negative exponential function with the natural constant as the base or a function form of can be used to implement the negative correlation normalization process, which is not limited herein. Among them, represents the normalization function. In an embodiment of the present invention, the normalization process can specifically be, for example, the maximum-minimum normalization process, and the normalization in the subsequent steps can all adopt the maximum-minimum normalization process. In other embodiments of the present invention, other normalization methods can be selected according to the specific numerical range, which will not be elaborated herein.

[0069] As an example, in an embodiment of the present invention, the expression of the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured can be specifically, for example:

[0070]

[0071] Wherein, represents the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured; represents the standard deviation of the magnetic induction intensity of the magnetization curves of all reference magnetic materials of the target magnetic material at the target position to be measured; represents the normalization function.

[0072] By the same method as above, the deformation evaluation index of the magnetization curve of each magnetic material at the target position to be measured can be obtained.

[0073] From the above analysis, it can be seen that there is a normal deformation difference phenomenon among the reference magnetic materials of the target magnetic material, which will affect the accuracy of the deformation evaluation ability, resulting in the deformation evaluation index obtained above being unable to accurately reflect the evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured for the deformation situation. Therefore, first, the standard deviation of the deformation amounts of all reference magnetic materials of the target magnetic material is used as the deformation fluctuation degree of the target magnetic material. The larger the deformation fluctuation degree, the greater the difference in the deformation amounts among all reference magnetic materials of the target magnetic material. By the same method, the deformation fluctuation degree of each magnetic material can be obtained.

[0074] While the deformation evaluation index of the magnetization curve of each magnetic material at the target position to be measured increases, the deformation fluctuation degree of each magnetic material decreases significantly, which indicates that there is a strong correlation between the magnetization curve of the magnetic material at the target position to be measured and the deformation of the magnetic material. Therefore, the sequence composed of the deformation evaluation indexes of the magnetization curves of all magnetic materials at the target position to be measured can be used as the deformation evaluation index sequence of the target position to be measured, and the sequence composed of the deformation fluctuation degrees of all magnetic materials can be used as the deformation fluctuation degree sequence. Among them, the elements at the same position in the deformation evaluation index sequence and the deformation fluctuation degree sequence correspond to the same magnetic material.

[0075] Furthermore, based on the calculation formula of the deformation evaluation weight, the deformation evaluation weight of the target position to be measured is obtained. The larger the deformation evaluation weight, the more accurate the evaluation result of the above deformation ability. The calculation formula of the deformation evaluation weight is:

[0076]

[0077] Wherein, represents the deformation evaluation weight of the target position to be measured; represents the deformation evaluation index sequence of the target position to be measured; represents the sequence of deformation fluctuation degrees; represents the Pearson correlation coefficient between the sequence of deformation evaluation indexes and the sequence of deformation fluctuation degrees at the target position to be measured.

[0078] Finally, use the deformation evaluation weight at the target position to be measured to adjust the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured, and take the product value of the deformation evaluation weight at the target position to be measured and the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured as the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured.

[0079] As an example, in an embodiment of the present invention, the expression of the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured can be specifically, for example:

[0080]

[0081] where represents the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured; represents the deformation evaluation weight at the target position to be measured; represents the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured.

[0082] By the same method as above, the deformation evaluation ability of the magnetization curve of each magnetic material at each position to be measured can be obtained.

[0083] Step S3: Obtain the initial deformation correlation degree at the target position to be measured according to the distribution of the magnetic induction intensity of the magnetization curves of all magnetic materials at the target position to be measured and the distribution of the deformation amounts of all magnetic materials; label each magnetic material with a non-zero natural number to obtain the serial number of each magnetic material, and adjust the initial deformation correlation degree according to the magnetic induction intensity and deformation evaluation ability of the magnetization curves of all magnetic materials at the target position to be measured, the deformation amounts and serial numbers of all magnetic materials, to obtain the true deformation correlation degree at the target position to be measured; obtain the non-deformation feature possibility at the target position to be measured according to the distribution of the deformation amounts of all reference magnetic materials of each magnetic material and the distribution of the deformation amounts of all magnetic materials; based on the non-deformation feature possibility and the true deformation correlation degree, screen out the key positions to be measured from all positions to be measured.

[0084] Considering that if the magnetization curve of the magnetic material at the target position to be measured reflects other characteristics of the magnetic material rather than the deformation characteristics at the magnetic field strength and magnetic induction intensity, this will also result in the target magnetization curve analyzed based on the reference magnetic materials with similar deformation amounts having a high deformation evaluation ability at the target position to be measured. Therefore, it is necessary to combine the distribution of the deformation amounts of different magnetic materials and analyze the distribution of the deformation evaluation abilities of the magnetization curves of magnetic materials with different deformation amounts at the target position to be measured. On the one hand, if the distribution of the deformation evaluation abilities of magnetic materials with different deformation amounts has a high consistency, it indicates that the magnetic induction intensity and the change in deformation amount of the magnetization curves of each magnetic material at the target position to be measured belong to normal differences, and the stronger the correlation between the target position to be measured and the deformation. On the other hand, if the distribution of the deformation amounts of each magnetic material with different deformation amounts is highly similar to the distribution of the deformation amounts of the reference magnetic materials of each magnetic material, it indicates that the magnetization curves of each magnetic material at the target position to be measured reflect other characteristics of the magnetic material rather than the deformation characteristics.

[0085] Therefore, first, analyze the distribution of the magnetic induction intensity of the magnetization curves of all magnetic materials at the target position to be measured and the distribution of the deformation amounts of all magnetic materials. The initial deformation correlation degree obtained reflects the degree of correlation between the data of the magnetization curves of all magnetic materials at the target position to be measured and the deformation of the magnetic materials. Subsequently, the initial deformation correlation degree can be further adjusted to accurately analyze the importance of the target position to be measured in reflecting the deformation of the magnetic materials.

[0086] Preferably, in an embodiment of the present invention, the method for obtaining the initial deformation correlation degree of the target position to be measured specifically includes:

[0087] First, obtain the probability distribution column of the magnetic induction intensity of the magnetization curves of all magnetic materials at the target position to be measured, and in this probability distribution column, the sequence obtained by arranging the probability values of each magnetic induction intensity in ascending order of the magnetic induction intensity is used as the first probability value sequence of the target position to be measured. Among them, the method for obtaining the probability distribution column is a well-known technical means for those skilled in the art and will not be elaborated here.

[0088] Obtain the probability distribution column of the deformation amounts of all magnetic materials, and in this probability distribution column, the sequence obtained by arranging the probability values of each deformation amount in ascending order of the deformation amount is used as the second probability value sequence.

[0089] Then, if the distribution of the magnetic induction intensity of the magnetization curves of all magnetic materials at the target position to be measured and the distribution of the deformation amounts of all magnetic materials are highly consistent, it indicates that the data of each magnetization curve at the target position to be measured has a strong correlation with the deformation of the magnetic materials. At the same time, considering that the lengths of the first probability value sequence and the second probability value sequence may be different, and the dynamic time warping algorithm can measure the differences between sequences of different lengths, the first probability value sequence and the second probability value sequence at the target position to be measured can be input into the dynamic time warping algorithm, and the output result of the dynamic time warping algorithm is subjected to a negative correlation mapping to obtain the initial deformation correlation degree at the target position to be measured.

[0090] As an example, in an embodiment of the present invention, the expression of the initial deformation correlation degree at the target position to be measured can be specifically, for example:

[0091]

[0092] Wherein, represents the initial deformation correlation degree at the target position to be measured; represents the first probability value sequence at the target position to be measured; represents the second probability value sequence; represents the output result of the dynamic time warping algorithm; represents a preset first adjustment parameter for preventing the denominator from being 0, The value range of is In an embodiment of the present invention, is set to 0.001. The specific value of

[0093] can also be set by the implementer according to the specific implementation scenario and is not limited herein.

[0094] It should be noted that in other embodiments of the present invention, negative correlation mapping can also be achieved through other basic mathematical operations, which will not be elaborated herein.

[0095] Preferably, in an embodiment of the present invention, the method for obtaining the true deformation correlation degree of the target position to be measured specifically includes:

[0096] First, a sequence obtained by arranging the serial numbers of all magnetic materials in descending order of the deformation amount of the magnetic materials is used as the first serial number sequence.

[0097] During the magnetization process, if a magnetic material undergoes severe deformation, it is usually due to quality problems during the production process, such as cracks, pores, heat treatment, magnetic leakage, demagnetization, etc., which will cause the magnetic flux path of the magnetic material to be damaged, resulting in a decrease in the corresponding magnetic induction intensity. Therefore, the more severe the deformation during the magnetization process, the smaller the corresponding magnetic induction intensity. Thus, a sequence obtained by arranging the serial numbers of all magnetic materials in ascending order of the magnetic induction intensity at the target position to be measured according to the magnetization curve of the magnetic material is used as the second serial number sequence of the target position to be measured.

[0098] The more positions with the same elements between the first serial number sequence and the second serial number sequence, the more the magnetic induction intensity of the magnetization curve of the magnetic material at the target position to be measured can reflect the deformation characteristics of the magnetic material during the magnetization process. Therefore, if the serial numbers at the same positions in the first serial number sequence and the second serial number sequence are the same, the serial numbers at this position in the first serial number sequence and the second serial number sequence are respectively marked. The number of marked serial numbers in the first serial number sequence is used as the numerator, the number of all serial numbers in the first serial number sequence is used as the denominator, and the ratio is used as the first similarity degree of the target position to be measured.

[0099] At the same time, there will be normal fluctuations in the data of the magnetization curve during the test process, resulting in a change in a certain serial number affecting the similarity between the first serial number sequence and the second serial number sequence. For the unmarked serial numbers in the first serial number sequence and the second serial number sequence, if the deformation evaluation capabilities of the magnetization curves of the magnetic materials corresponding to the unmarked serial numbers at the same positions between the first serial number sequence and the second serial number sequence are similar, it means that the possibility of this order difference belonging to normal curve fluctuations is greater. Therefore, the marked serial numbers in the first serial number sequence can be deleted, and the sequence after deletion is used as the first default serial number sequence of the target position to be measured. The serial number at each position in the first default serial number sequence is replaced with the deformation evaluation ability of the magnetization curve of the magnetic material corresponding to this serial number, and the sequence after replacement is used as the first deformation evaluation ability sequence of the target position to be measured.

[0100] Delete the marked serial numbers in the second serial number sequence, and use the sequence after deletion as the second default serial number sequence. Replace the serial number at each position in the second default serial number sequence with the deformation evaluation ability of the magnetization curve of the magnetic material corresponding to this serial number, and use the sequence after replacement as the second deformation evaluation ability sequence.

[0101] And use the cosine similarity between the first deformation evaluation ability sequence and the second deformation evaluation ability sequence at the target position to be measured as the second similarity degree of the target position to be measured.

[0102] Based on the calculation formula of the deformation correlation degree weight, obtain the deformation correlation degree weight of the target position to be measured. The calculation formula of the deformation correlation degree weight is:

[0103]

[0104] Wherein, represents the deformation correlation degree weight of the target position to be measured; represents the first similarity degree of the target position to be measured; represents the second similarity degree of the target position to be measured.

[0105] Take the product value of the deformation correlation degree weight of the target position to be measured and the initial deformation correlation degree as the true deformation correlation degree of the target position to be measured.

[0106] As an example, in an embodiment of the present invention, the expression of the true deformation correlation degree of the target position to be measured can be specifically, for example:

[0107]

[0108] Wherein, represents the true deformation correlation degree of the target position to be measured; represents the deformation correlation degree weight of the target position to be measured; represents the initial deformation correlation degree of the target position to be measured.

[0109] The true deformation correlation degree of each position to be measured can be obtained by the same method as above.

[0110] At the same time, if the local distribution of the deformation amounts of all reference magnetic materials of each magnetic material is more similar to the global distribution of the deformation amounts of all magnetic materials, it indicates that the data of each magnetization curve at the target position to be measured reflects the material characteristics of the magnetized material rather than the deformation characteristics. Therefore, the distribution of the deformation amounts of all reference magnetic materials of each magnetic material and the distribution of the deformation amounts of all magnetic materials can be analyzed, and the possibility that the characteristics reflected by the magnetization curve data at the target position to be measured are not deformation characteristics can be reflected by the obtained non-deformation characteristic possibility. Subsequently, the key positions to be measured can be screened by combining the non-deformation characteristic possibility and the true deformation correlation degree obtained above.

[0111] Preferably, in an embodiment of the present invention, the method for obtaining the non-deformation characteristic possibility of the target position to be measured specifically includes:

[0112] Using the method for obtaining the second probability value sequence, based on the distribution of the deformation amounts of all reference magnetic materials of the target magnetic material, a third probability value sequence of the target magnetic material is obtained. The specific obtaining process is as follows: Obtain the probability distribution column of the deformation amounts of all reference magnetic materials of the target magnetic material, and in this probability distribution column, arrange the probability values of each deformation amount in ascending order of the deformation amount, and the obtained sequence is used as the third probability value sequence of the target magnetic material.

[0113] Input the third probability value sequence and the second probability value sequence of the target magnetic material into the dynamic time warping algorithm, and use the output result of the dynamic time warping algorithm as the deformation distribution error of the target magnetic material. The larger the deformation distribution error, the less similar the local distribution of the deformation amounts of all reference magnetic materials of the target magnetic material is to the global distribution of the deformation amounts of all magnetic materials.

[0114] By the same method, the deformation distribution error of each magnetic material can be obtained, and then a negative correlation mapping is performed on the average value of the deformation distribution errors of all magnetic materials to obtain the non-deformation feature possibility of the target measurement position.

[0115] As an example, in an embodiment of the present invention, the expression of the non-deformation feature possibility of the target measurement position can be specifically, for example:

[0116]

[0117] Among them, represents the non-deformation feature possibility of the target measurement position; represents the second probability value sequence; represents the rd probability value sequence of the th magnetic material; represents the deformation distribution error of the th magnetic material; represents the number of magnetic materials; represents a preset second adjustment parameter for preventing the denominator from being zero, and the value range of is In an embodiment of the present invention, is set to 0.001, The specific value of can also be set by the implementer according to the specific implementation scenario and is not limited herein.

[0118] By the same method as above, the non-deformation feature possibility of each measurement position can be obtained.

[0119] The greater the true deformation correlation degree of a certain position to be measured, and the smaller the possibility of non-deformation characteristics, it indicates that the magnetic field strength and magnetic induction intensity of the magnetization curve of the magnetic material at this position to be measured are more important for reflecting the deformation characteristics of the magnetic material. Therefore, based on the possibility of non-deformation characteristics and the true deformation correlation degree, key positions to be measured can be screened out from all positions to be measured. Subsequently, based on the magnetic field strength and magnetic induction intensity of the key positions to be measured, and combined with the amount of deformation, an accurate deformation monitoring model can be constructed to accurately monitor the deformation of the magnetic material.

[0120] Preferably, in an embodiment of the present invention, the method for screening out key positions to be measured from all positions to be measured specifically includes:

[0121] Taking the true deformation correlation degree of each position to be measured as the numerator, taking the possibility of non-deformation characteristics of each position to be measured as the denominator, and performing normalization processing on the ratio to obtain the importance of deformation evaluation of each position to be measured.

[0122] As an example, in an embodiment of the present invention, the expression of the importance of deformation evaluation of each position to be measured can be specifically, for example:

[0123]

[0124] Wherein, represents the importance of deformation evaluation of the th position to be measured; represents the true deformation correlation degree of the th position to be measured; represents the possibility of non-deformation characteristics of the th position to be measured; represents the normalization function.

[0125] The greater the importance of deformation evaluation of a certain position to be measured, it indicates that this position to be measured is more important. Therefore, the positions to be measured with the importance of deformation evaluation greater than the preset importance threshold are used as key positions to be measured. Among them, the preset importance threshold is set to 0.6, and the specific value of the pre-trial importance threshold can also be set by the implementer according to the specific implementation scenario, and is not limited here.

[0126] Thus, the key positions to be measured are screened out.

[0127] Step S4: Based on the magnetic field strength and magnetic induction intensity of the magnetization curves of each magnetic material at the key positions to be measured, and the amount of deformation of each magnetic material, construct a deformation monitoring model, and use the deformation monitoring model to monitor the deformation of the magnetic material to be monitored.

[0128] The data of the magnetization curve of the magnetic material at the key positions to be measured is important for evaluating the deformation of the magnetic material. Therefore, based on the magnetic field strength and magnetic induction intensity of the magnetization curve of each magnetic material at the key positions to be measured, and the deformation amount of each magnetic material, a deformation monitoring model can be constructed, and the deformation monitoring model can be used to monitor the deformation of the magnetic material to be monitored, thereby improving the accuracy of the deformation monitoring of the magnetic material.

[0129] Preferably, in an embodiment of the present invention, the method for constructing the deformation monitoring model specifically includes:

[0130] Input the two-dimensional data composed of the magnetic field strength and magnetic induction intensity of the magnetization curve of each magnetic material at each key position to be measured and the deformation amount of each magnetic material into the PLS algorithm for processing to obtain the deformation monitoring model. Among them, the PLS algorithm is a well-known technical means in the art and will not be elaborated here.

[0131] Among them, the input of the deformation monitoring model is the two-dimensional data on the magnetization curve of a certain magnetic material, and the output is the deformation amount of the magnetic material. Therefore, the deformation monitoring model can be used to monitor the deformation of the magnetic material to be monitored.

[0132] Preferably, in an embodiment of the present invention, the method for monitoring the deformation of the magnetic material to be monitored specifically includes:

[0133] Use the method in step S1 to obtain the magnetization curve of the magnetic material to be monitored, input the two-dimensional data composed of the magnetic field strength and magnetic induction intensity of the magnetization curve of the magnetic material to be monitored at each key position to be measured into the deformation monitoring model, and the deformation monitoring model outputs the deformation amount of the magnetic material to be monitored.

[0134] An embodiment of the present invention provides a deformation monitoring system for magnetic materials. The system includes a memory, a processor, and a computer program. The memory is used to store the corresponding computer program, and the processor is used to run the corresponding computer program. When the computer program runs in the processor, it can implement the methods described in steps S1 to S4.

[0135] It should be noted that: the above sequence of embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0136] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A deformation monitoring method for a magnetic material, characterized in that, The method includes: Obtaining the magnetization curve and the amount of deformation of each magnetic material in the same production batch, where the horizontal axis of the coordinate system of the magnetization curve is the magnetic field strength and the vertical axis is the magnetic induction intensity, and a plurality of positions to be measured are uniformly selected on the horizontal axis of the coordinate system; Taking any one of the magnetic materials as the target magnetic material, obtaining the reference magnetic material of the target magnetic material according to the amount of deformation of the target magnetic material, taking any one of the positions to be measured as the target position to be measured, and obtaining the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured according to the distribution of the magnetic induction intensity and the distribution of the amounts of deformation of all the reference magnetic materials of the target magnetic material at the target position to be measured; Obtaining the initial deformation correlation degree of the target position to be measured according to the distribution of the magnetic induction intensity and the distribution of the amounts of deformation of all the magnetic materials at the target position to be measured; numbering each magnetic material with a non-zero natural number to obtain the serial number of each magnetic material, and adjusting the initial deformation correlation degree according to the magnetic induction intensity and the deformation evaluation ability of all the magnetic materials at the target position to be measured, the amounts of deformation and the serial numbers of all the magnetic materials to obtain the true deformation correlation degree of the target position to be measured; obtaining the probability of non-deformation characteristics of the target position to be measured according to the distribution of the amounts of deformation of all the reference magnetic materials of each magnetic material and the distribution of the amounts of deformation of all the magnetic materials; screening out the key positions to be measured from all the positions to be measured based on the probability of non-deformation characteristics and the true deformation correlation degree; Constructing a deformation monitoring model based on the magnetic field strength and the magnetic induction intensity of the magnetization curves of each magnetic material at the key positions to be measured and the amounts of deformation of each magnetic material, and using the deformation monitoring model to monitor the deformation of the magnetic materials to be monitored; The obtaining of the initial deformation correlation degree of the target position to be measured includes: Obtaining the probability distribution column of the magnetic induction intensity of the magnetization curves of all the magnetic materials at the target position to be measured, and in this probability distribution column, taking the sequence obtained by arranging the probability values of each magnetic induction intensity in ascending order of the magnetic induction intensity as the first probability value sequence of the target position to be measured; Obtaining the probability distribution column of the amounts of deformation of all the magnetic materials, and in this probability distribution column, taking the sequence obtained by arranging the probability values of each amount of deformation in ascending order of the amount of deformation as the second probability value sequence; Inputting the first probability value sequence and the second probability value sequence of the target position to be measured into the dynamic time warping algorithm, and performing a negative correlation mapping on the output result of the dynamic time warping algorithm to obtain the initial deformation correlation degree of the target position to be measured.

2. The deformation monitoring method of a magnetic material according to claim 1, characterized in that, The obtaining of the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured includes: Performing a negative correlation normalization process on the standard deviation of the magnetic induction intensity of the magnetization curves of all the reference magnetic materials of the target magnetic material at the target position to be measured to obtain the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured; The standard deviation of the amount of deformation of all reference magnetic materials of the target magnetic material is used as the deformation fluctuation degree of the target magnetic material; The sequence composed of the deformation evaluation indexes of the magnetization curves of all magnetic materials at the target position to be measured is used as the deformation evaluation index sequence of the target position to be measured, and the sequence composed of the deformation fluctuation degrees of all magnetic materials is used as the deformation fluctuation degree sequence. Among them, the elements at the same position in the deformation evaluation index sequence and the deformation fluctuation degree sequence correspond to the same magnetic material; Based on the calculation formula of the deformation evaluation weight, the deformation evaluation weight of the target position to be measured is obtained. The calculation formula of the deformation evaluation weight is: Among them, represents the deformation evaluation weight of the target position to be measured; represents the deformation evaluation index sequence of the target position to be measured; represents the deformation fluctuation degree sequence; represents the Pearson correlation coefficient between the deformation evaluation index sequence of the target position to be measured and the deformation fluctuation degree sequence; The product value of the deformation evaluation weight of the target position to be measured and the deformation evaluation index of the magnetization curve of the target magnetic material at the target position to be measured is used as the deformation evaluation ability of the magnetization curve of the target magnetic material at the target position to be measured.

3. A deformation monitoring method for a magnetic material according to claim 1, characterized in that, The obtaining of the true deformation correlation degree of the target position to be measured includes: The sequence obtained by arranging the serial numbers of all magnetic materials in descending order of the amount of deformation of the magnetic materials is used as the first serial number sequence; The sequence obtained by arranging the serial numbers of all magnetic materials in ascending order of the magnetic induction intensity of the magnetization curve of the magnetic materials at the target position to be measured is used as the second serial number sequence of the target position to be measured; If the serial numbers at the same position in the first serial number sequence and the second serial number sequence are the same, the serial numbers at this position in the first serial number sequence and the second serial number sequence are respectively marked. The number of marked serial numbers in the first serial number sequence is used as the numerator, and the number of all serial numbers in the first serial number sequence is used as the denominator. The ratio is used as the first similarity degree of the target position to be measured; Delete the marked serial numbers in the first serial number sequence, and use the deleted sequence as the first default serial number sequence of the target position to be measured. Replace the serial number at each position in the first default serial number sequence with the deformation evaluation ability of the magnetization curve of the magnetic material corresponding to this serial number at the target position to be measured, and use the replaced sequence as the first deformation evaluation ability sequence of the target position to be measured; Delete the marked serial numbers in the second serial number sequence, and use the deleted sequence as the second default serial number sequence. Replace the serial number at each position in the second default serial number sequence with the deformation evaluation ability of the magnetization curve of the magnetic material corresponding to this serial number at the target position to be measured, and use the replaced sequence as the second deformation evaluation ability sequence; The cosine similarity between the first deformation evaluation ability sequence and the second deformation evaluation ability sequence of the target position to be measured is used as the second similarity degree of the target position to be measured; Based on the calculation formula of the deformation correlation degree weight, the deformation correlation degree weight of the target position to be measured is obtained. The calculation formula of the deformation correlation degree weight is: Among them, represents the deformation correlation weight of the target position to be measured; represents the first similarity degree of the target position to be measured; represents the second similarity degree of the target position to be measured; The product value of the deformation correlation degree weight of the target position to be measured and the initial deformation correlation degree is used as the true deformation correlation degree of the target position to be measured.

4. The deformation monitoring method of a magnetic material according to claim 1, characterized in that The obtaining of the non-deformation feature possibility of the target position to be measured includes: Using the method for obtaining the second probability value sequence, based on the distribution of the deformation amounts of all the reference magnetic materials of the target magnetic material, a third probability value sequence of the target magnetic material is obtained; The third probability value sequence and the second probability value sequence of the target magnetic material are input into the dynamic time warping algorithm, and the output result of the dynamic time warping algorithm is used as the deformation distribution error of the target magnetic material; A negative correlation mapping is performed on the average value of the deformation distribution errors of all the magnetic materials to obtain the non-deformation feature possibility of the target position to be measured.

5. A deformation monitoring method for a magnetic material according to claim 1, characterized in that, The screening of the key positions to be measured from all the positions to be measured includes: Taking the true deformation correlation degree of each position to be measured as the numerator, taking the non-deformation feature possibility of each position to be measured as the denominator, and performing normalization processing on the ratio value to obtain the deformation evaluation importance of each position to be measured; The positions to be measured with the deformation evaluation importance greater than the preset importance threshold are used as the key positions to be measured.

6. A deformation monitoring method for a magnetic material according to claim 1, characterized in that The constructing of the deformation monitoring model includes: The two-dimensional data composed of the magnetic field strength and the magnetic induction intensity at each key position to be measured of the magnetization curves of each magnetic material and the deformation amount of each magnetic material are input into the PLS algorithm for processing to obtain the deformation monitoring model.

7. A deformation monitoring method for a magnetic material according to claim 1, characterized in that The deformation monitoring of the magnetic material to be monitored includes: The magnetization curve of the magnetic material to be monitored is obtained, the two-dimensional data composed of the magnetic field strength and the magnetic induction intensity at each key position to be measured of the magnetization curve of the magnetic material to be monitored is input into the deformation monitoring model, and the deformation amount of the magnetic material to be monitored is output by the deformation monitoring model.

8. A deformation monitoring method for a magnetic material according to claim 1, characterized in that, The obtaining of the reference magnetic materials of the target magnetic material includes: Set the deformation similarity range of the target magnetic material, where the deformation similarity range is , where represents the amount of deformation of the target magnetic material; represents a preset limit value, The value range of is ; The other magnetic materials except the target magnetic material and with the deformation amount belonging to the deformation similarity range of the target magnetic material are used as the reference magnetic materials of the target magnetic material.

9. A deformation monitoring system for a magnetic material, the system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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