CN102621161B - Method for obtaining material performance parameter - Google Patents

Abstract

The invention provides a method for obtaining a material performance parameter. The method comprises the following steps of: carrying out fractional frequency processing on microwave signals in preset frequencies, and generating fractional frequency data corresponding to the frequencies of the microwave signals; obtaining reaction data of a tested material under the action of a preset external force by utilizing the microwave signals; and obtaining a stress value and a loss angle value of the tested material in the microwave signals according to the fractional frequency data and the reaction data. The method also comprises the following steps of: obtaining a preset displacement control value corresponding to the preset external force; obtaining a standard strain value corresponding to thedisplacement control value according to the relation between the displacement control value and a standard strain value; obtaining a test strain value of the tested material under the action of the preset external force; and calculating the displacement value, the standard strain value and the test strain value to obtain an actual strain value.

Description

Method for acquiring material performance parameters

Technical Field

The invention relates to the field of material performance detection and data processing, in particular to a method for acquiring material performance parameters.

Background

Before applying materials, particularly high-end materials, the material performance of the materials needs to be tested to judge the actual application of the materials according to material performance parameters, wherein the material performance parameters generally comprise stress values, strain values, loss angle values and the like.

When the material can not generate displacement under the action of external force under the action of microwave signals with certain temperature and certain frequency, the geometric shape and the size of the material can generate deformation, and the deformation is called as strain. When the material is deformed, acting forces with equal magnitude but opposite directions are generated inside to resist the external force, and the reacting force per unit area is called stress. And the strain lags the stress, and a phase difference exists between the strain lags the stress and the strain lags the stress, and the phase difference is a loss angle.

However, no material performance parameter acquisition method is available at present to realize accurate acquisition of the material performance parameters.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a material performance parameter obtaining method, which is used for solving the technical problem that the accurate obtaining of the performance parameters of high-end materials, such as strain, stress and loss angle, cannot be realized in the prior art.

The invention provides a method for acquiring material performance parameters, which comprises the following steps:

performing frequency division processing on a microwave signal with a preset frequency to generate frequency division data corresponding to the frequency of the microwave signal;

acquiring reaction data of the tested material under the action of a preset external force by using the microwave signal;

and acquiring the stress value and the loss angle value of the tested material in the microwave signal according to the frequency division data and the reaction data.

The above method, preferably, further comprises:

acquiring a preset displacement control value corresponding to the preset external force;

obtaining a standard strain value corresponding to the displacement control value according to the relation between the displacement control value and the standard strain value;

acquiring a test strain value of the tested material under the action of the preset external force;

and calculating the displacement control value, the standard strain value and the test strain value to obtain an actual strain value.

In the above method, preferably, the calculating the displacement control value, the standard strain value, and the test strain value to obtain an actual strain value specifically includes:

recording the displacement control value, the standard strain value and the test strain value as um, by and cy respectively;

acquiring the deviation cy-by of the test strain value cy and the standard strain value by, and acquiring a deviation rate according to the deviation and the standard strain value

According to $\mathrm{wy}=\mathrm{um}+\frac{\mathrm{cy}-\mathrm{by}}{\mathrm{by}}\×\mathrm{um}$ Acquiring an actual strain value;

wherein,

and calculating wy which is a deviation value of the deviation rate of the test strain value relative to the displacement control value and is the actual strain value.

Preferably, the obtaining the stress value and the loss angle value of the tested material in the microwave signal according to the frequency division data and the reaction data specifically includes:

extracting intermediate data of the reaction data to obtain an intermediate data array;

extracting even data and odd data from the intermediate data array to respectively obtain a first intermediate data array and a second intermediate data array;

and calculating the frequency division data, the first intermediate data array and the second intermediate data array to obtain a stress value and a loss angle value.

In the above method, preferably, the calculating the frequency division data, the first intermediate data array, and the second intermediate data array, and the obtaining the stress value and the loss angle value includes:

dividing the frequency division data and the first intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the first intermediate data array are grouped to obtain a first stress data array;

dividing the frequency division data and the second intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the second intermediate data array are grouped to obtain a second stress data array and a third stress data array;

sequencing all data in the second stress data array to obtain stress values;

acquiring a middle stress data array according to the first stress data array and the third stress data array;

judging whether each item of data in the middle stress data array is larger than 270 degrees, if so, acquiring a difference absolute value between a data item of which the data is larger than 270 degrees and 360 degrees, and taking the absolute value as a data item corresponding to the data item in the middle stress data array, otherwise, taking the data item as a data item corresponding to the data item in the middle stress data array;

and sequencing all data in the middle stress data array to obtain a loss angle value.

According to the method for acquiring the material performance parameters, the microwave signal with the preset frequency is subjected to frequency division processing, the microwave signal is used for acquiring reaction data of a tested material under the action of a preset external force, the stress value and the loss angle value of the tested material in the microwave signal are acquired according to the frequency division data and the reaction data, meanwhile, a displacement control value corresponding to the preset external force is acquired, a standard strain value corresponding to the displacement control value is obtained according to the relation between the displacement control value and the standard strain value, the test strain value of the tested material under the action of the preset external force is acquired, and the displacement control value, the standard strain value and the test strain value are calculated to obtain an actual strain value. And judging the use of the tested material according to the stress value, the loss angle value and the strain value.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a flowchart of a first embodiment of a method for obtaining material property parameters according to the present invention;

FIG. 2 is a partial flowchart of a second embodiment of a method for obtaining material property parameters according to the present invention;

FIG. 3 is a partial flowchart of a second embodiment of a method for obtaining material property parameters according to the present invention;

FIG. 4 is a flowchart of a third embodiment of a method for obtaining material property parameters according to the present invention;

fig. 5 is a partial flowchart of a third embodiment of a method for obtaining material performance parameters according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, there is shown a flow chart of a material property parameter obtaining method provided by the present invention, which may include the following steps:

step 101: the method includes the steps of performing frequency division processing on a microwave signal with a preset frequency, and generating frequency division data corresponding to the frequency of the microwave signal.

The method embodiment is used for obtaining the performance parameters of the tested material, the performance parameters of the tested material refer to that under the action of a microwave signal with a certain specific frequency, a preset external force is applied to the tested material, but the displacement of the tested material is not changed, the geometric shape and the size of the tested material are deformed, and the deformation of the tested material is called as strain. When the tested material deforms, acting forces with equal magnitude and opposite directions are generated in the tested material to resist the preset external force, and the force in unit area is stress. Strain hysteresis, phase difference between them, the phase difference and loss angle.

The frequency division processing is carried out on the high-frequency microwave signal which is generated by the microwave signal generator and is pre-applied to the tested material, and frequency division data corresponding to the frequency of the microwave signal is obtained.

Step 102: and acquiring reaction data of the tested material under the action of a preset external force by using the microwave signal.

Wherein, the order of the step 101 and the step 102 can be interchanged without affecting the execution result of the method of the present invention.

And applying the high-frequency microwave signal to the tested material, and applying a preset external force to the tested material to obtain the reaction data of the tested material under the action of the microwave signal under the preset external force.

Step 103: and acquiring the stress value and the loss angle value of the tested material in the microwave signal according to the frequency division data and the reaction data.

And calculating the frequency division data and the reaction data, and acquiring a stress value and a loss angle value of the tested material in the microwave signal according to the distribution data and the reaction data.

According to the above scheme, in the first embodiment of the method for acquiring material performance parameters provided by the present invention, frequency division processing is performed on a microwave signal with a predetermined frequency to generate frequency division data corresponding to the frequency of the microwave signal, the microwave signal is used to acquire reaction data of a material to be tested under a predetermined external force, and a stress value and a loss angle value of the material to be tested in the microwave signal are acquired according to the frequency division data and the reaction data. And judging the application of the tested material according to the stress value and the loss angle value.

Referring to fig. 2, which shows a partial flowchart of a second embodiment of the method for obtaining material performance parameters provided by the present invention, based on the first embodiment of the method of the present invention, the method may further include the following steps:

step 201: and acquiring a preset displacement control value corresponding to the preset external force.

And when the preset external force is applied to the tested material in the microwave signal, the displacement control value corresponding to the preset external force is obtained.

Step 202: and obtaining a standard strain value corresponding to the displacement control value according to the relation between the displacement control value and the standard strain value.

And setting the relation between the displacement control value and the standard strain value before acquiring the material performance parameters of the tested material. When the relationship between the displacement control value and the standard strain value is set, the relationship can be set according to historical data of parameter acquisition of the tested material. Therefore, the standard strain value corresponding to the displacement control value is obtained according to the relation between the displacement control value and the standard strain value. For example, a relationship between the displacement control value and the standard strain value is established, such as: the value 600 corresponds to 5 micrometers, and after a displacement control value corresponding to the preset external force is obtained, a standard strain value is obtained according to the relationship between the value and the displacement control value, wherein 600 × displacement control value/5 is the standard strain value corresponding to the displacement control value.

Step 203: and acquiring a test strain value of the tested material under the action of the preset external force.

The execution order of the step 201, the step 202 and the step 203 can be changed without affecting the execution of the scheme of the present invention, for example, the step 203 is executed first, and the step 201 and the step 202 are executed.

And acquiring data of the strain of the tested material under the action of the preset external force, namely acquiring a test strain value of the tested material under the action of the preset external force.

Step 204: and calculating the displacement control value, the standard strain value and the test strain value to obtain an actual strain value.

After the displacement control value, the standard strain value, and the test strain value are obtained, the displacement control value, the standard strain value, and the test strain value are calculated to obtain an actual strain value, and a specific calculation process, as shown in fig. 3 provided by the present invention, includes:

step 301: and recording the displacement control value, the standard strain value and the test strain value as um, by and cy respectively.

Step 302: acquiring the deviation cy-by of the test strain value cy and the standard strain value by, and acquiring a deviation rate according to the deviation cy-by and the standard strain value by

Step 303: according to $\mathrm{wy}=\mathrm{um}+\frac{\mathrm{cy}-\mathrm{by}}{\mathrm{by}}\×\mathrm{um}$ Acquiring an actual strain value;

wherein,

and calculating wy which is a deviation value of the deviation rate of the test strain value relative to the displacement control value and is the actual strain value.

According to the scheme, in the embodiment of the method for acquiring the material performance parameters, the displacement control value corresponding to the preset external force is acquired, the standard strain value corresponding to the displacement control value is obtained according to the relation between the displacement control value and the standard strain value, the test strain value of the tested material under the action of the preset external force is acquired, and the actual strain value is obtained by calculating the displacement control value, the standard strain value and the test strain value. So as to judge the use of the tested material according to the strain value.

Referring to fig. 4, which shows a flowchart of a third embodiment of the material performance parameter obtaining method provided by the present invention, based on the first embodiment of the method of the present invention, the step 103 may include the following steps:

step 403: and extracting intermediate data of the reaction data to obtain an intermediate data array.

Before the frequency division data and the reaction data are calculated, in order to improve the accuracy of data calculation, data extraction is performed on the reaction data, intermediate data of the reaction data can be extracted according to a preset extraction rule, and an intermediate data array is formed by the extracted intermediate data, wherein the array size is determined according to the extraction rule.

Step 404: and extracting the even number data and the odd number data of the intermediate data array to respectively obtain a first intermediate data array and a second intermediate data array.

And performing data extraction again on the intermediate data array obtained by accurate data extraction, dividing the intermediate data array into two groups of data, namely performing even-numbered data extraction on the intermediate data array to obtain a first intermediate data array consisting of even-numbered data, and forming a second intermediate data array by using the remaining odd-numbered data in the intermediate data array.

Step 405: and calculating the frequency division data, the first intermediate data array and the second intermediate data array to obtain a stress value and a loss angle value.

It should be noted that step 401 and step 402 are the same as step 101 and step 102 in the first embodiment of the method of the present invention, and are not described again here.

In step 405, as shown in fig. 5 provided by the present invention, the specific calculation process includes:

step 501: and dividing the frequency division data and the first intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the first intermediate data array are grouped to obtain a first stress data array.

The frequency division Data, the first intermediate Data array and the second intermediate Data array are respectively recorded as w [ n1], y1Data [ n3] and y2Data [ n4], wherein n1, n3 and n4 are the Data numbers in the frequency division Data, the first intermediate Data array and the second intermediate Data array respectively.

In step 501, w [ n1] and y1Data [ n3] are divided into a plurality of arrays respectively, and the grouped Data of w [ n1] and y1Data [ n3] are calculated to obtain a first stress Data array which can be marked as deg yi [ n8 ];

wherein n8 is the number of data in the first stress data array.

The specific calculation process in step 501 includes:

dividing wt [ n1] and y1Data [ n3] into a plurality of arrays respectively to form a plurality of array combination sets consisting of two arrays respectively, for example, dividing wt [ n1] and y1Data [ n3] into 10 arrays, and extracting one array combination of wt1[ n5] and yData1[ n6 ];

wherein n5 and n6 are the data numbers in the array wt1[ n5] and the array yData1[ n6], respectively;

according to $x1\left[i\right]=\cos \left(\mathrm{\ωt}1\right[i\left]\right)-\frac{\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\cos \left(\mathrm{\ωt}1\right[i\left]\right)}{n5},$ $x2\left[i\right]=\sin \left(\mathrm{\ωt}1\right[i\left]\right)-\frac{\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\sin \left(\mathrm{\ωt}1\right[i\left]\right)}{n5}$ And $y\left[i\right]=\mathrm{yData}1\left[i\right]-\frac{\underset{i=0}{\overset{n6-1}{\mathrm{\Σ}}}\mathrm{yData}\left[i\right]}{n6}$ respectively obtaining a first intermediate number x1[ n5]]Second intermediate array x2[ n5]]And a third intermediate array y [ n6]]；

Wherein i belongs to [0, n5-1], wt [ i ] is ith data of wt [ n1], and yData1[ i ] is ith data of yData1[ n6 ];

according to $a=\frac{N2\×k2-N3\×k1}{N2\×N2-N1\×N3},$ $b=\frac{N2\×k1-N1\×k2}{N2\×N2-N1\×N3}$ From x1[ n5]]、x2[n5]And y [ n6]Acquiring a first intermediate variable a and a second intermediate variable b;

wherein, $k1=\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\left(y\right[i]\×x1[i\left]\right),$ $k2=\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\left(y\right[i]\×x2[i\left]\right),$ $N1=\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\left(x1\right[i]\×x1[i\left]\right),$ $N2=\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\left(x1\right[i]\×x2[i\left]\right),$ $N3=\underset{i=0}{\overset{n5-1}{\mathrm{\Σ}}}\left(x2\right[i]\×x2[i\left]\right),$ x1[i]、x2[i]and y [ i]Are respectively x1[ n5]]、x2[n5]And y [ n6]The first data of (1);

according to

Summing the square of a and the square of b, and taking the square root of the summed value to obtain a third intermediate variable A1;

judging the values of a and b, and acquiring a fifth intermediate variable degree1 as first data of deg yi [ n8] according to a and b;

wherein if a > 0 and b < 0, the fourth intermediate variable ${\mathrm{angle}=}^{\arcsin \left(\frac{-b}{A1}\right)},$ If a > 0 and b > 0, ${\mathrm{angle}=}^{2\mathrm{\&pi;}-\arcsin \left(\frac{b}{A1}\right)},$ if a < 0 and b < 0, ${\mathrm{angle}=}^{\mathrm{\&pi;}-\arcsin \left(\frac{-b}{A1}\right)},$ if a < 0 and b > 0, ${\mathrm{angle}=}^{\mathrm{\&pi;}+\arcsin \left(\frac{b}{A1}\right)};$

according to

Acquiring a fifth intermediate variable degree1 as deg yi [ n8]]The first data of (1);

and calculating other array combinations in the array combination set according to the method to obtain other data in the deg yi [ n8 ].

Step 502: and dividing the frequency division data and the second intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the second intermediate data array are grouped to obtain a second stress data array and a third stress data array.

Wherein, the wt [ n1] and the yData2[ n4] are respectively calculated according to the data calculation method of the wt [ n1] and the yData1[ n3] in the step 501 to obtain the deg yi [ n8] to obtain the third stress data array deg li [ n8 ].

Wherein, the second stress data array Ali [ n7] is obtained by calculating wt [ n1] and yData2[ n4] according to the data calculation method of calculating the grouped data of wt [ n1] and yData1[ n3] in the step 501 to obtain a plurality of A1 values.

Step 503: and sequencing all data in the second stress data array to obtain a stress value.

And sequencing all the data in the Ali [ n7], wherein the sequencing rule can select a sequencing rule from large to small, and the stress value of the tested material is obtained by calculating the sequenced fourth data.

Step 504: and acquiring a middle stress data array according to the first stress data array and the third stress data array.

The method comprises the steps of calculating deg li [ n8] and deg yi [ n8] according to deg [ j ] ═ deg [ j ] -deg yi [ j ] | to obtain deg [ n8], wherein j belongs to [0, n8-1], deg [ j ] is the jth data in the deg [ n8], deg [ j ] is the jth data in the deg li [ n8], and deg yi [ j ] is the jth data in the deg yi [ n8 ].

Step 505: judging whether each item of data in the middle stress data array is larger than 270 degrees, if so, executing a step 506, otherwise, executing a step 507;

step 506: acquiring the absolute value of the difference between the data item of which the data is greater than 270 degrees and 360 degrees, and taking the absolute value as the data item corresponding to the data item in the intermediate stress data array;

step 507: and taking the data item as the data item corresponding to the data item in the intermediate stress data array.

Judging whether each item of data in the degi [ n8] is larger than 270 degrees, if so, acquiring the absolute value of the difference between the data item of which the data is larger than 270 degrees and 360 degrees, and taking the absolute value as the data item in the deg [ n8], otherwise, taking the data item as the data item corresponding to the data item in the deg [ n8 ].

Step 508: and sequencing all data in the middle stress data array to obtain a loss angle value.

And sorting each item of data in the deg [ n8], wherein the sorting rule can select a sorting rule from large to small, and the sorted fourth data is selected as the loss angle value of the tested material.

According to the scheme, the embodiment of the material performance parameter obtaining method provided by the invention generates frequency division data corresponding to the frequency of the microwave signal by performing frequency division processing on the microwave signal with the preset frequency, obtains the reaction data of the tested material under the action of the preset external force by using the microwave signal, performs data extraction on the reaction data, obtains the stress value and the loss angle value according to the frequency division data and the extracted reaction data, and ensures the accuracy of the stress value and the loss angle value. And judging the application of the tested material according to the stress value and the loss angle value.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The above method for obtaining material performance parameters provided by the present application is described in detail, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the above example is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (4)

1. A method for acquiring material performance parameters is characterized by comprising the following steps:

performing frequency division processing on a microwave signal with a preset frequency to generate frequency division data corresponding to the frequency of the microwave signal;

acquiring reaction data of the tested material under the action of a preset external force by using the microwave signal;

acquiring a stress value and a loss angle value of the tested material in the microwave signal according to the frequency division data and the reaction data;

acquiring a preset displacement control value corresponding to the preset external force;

obtaining a standard strain value corresponding to the displacement control value according to the relation between the displacement control value and the standard strain value;

acquiring a test strain value of the tested material under the action of the preset external force;

and calculating the displacement control value, the standard strain value and the test strain value to obtain an actual strain value.

2. The method of claim 1, wherein the calculating the displacement control value, the standard strain value, and the test strain value to obtain an actual strain value specifically comprises:

recording the displacement control value, the standard strain value and the test strain value as um, by and cy respectively;

acquiring the deviation cy-by of the test strain value cy and the standard strain value by, and acquiring a deviation rate according to the deviation cy-by and the standard strain value by

According to $\mathrm{wy}=\mathrm{um}+\frac{\mathrm{cy}-\mathrm{by}}{\mathrm{by}}\&times;\mathrm{um}$ Acquiring an actual strain value;

wherein,

and calculating wy which is a deviation value of the deviation rate of the test strain value relative to the displacement control value and is the actual strain value.

3. The method of claim 1, wherein obtaining the stress value and the loss angle value of the material under test in the microwave signal according to the frequency division data and the response data specifically comprises:

extracting intermediate data of the reaction data to obtain an intermediate data array;

extracting even data and odd data from the intermediate data array to respectively obtain a first intermediate data array and a second intermediate data array;

and calculating the frequency division data, the first intermediate data array and the second intermediate data array to obtain a stress value and a loss angle value.

4. The method of claim 3, wherein calculating the frequency-divided data, the first intermediate data array, and the second intermediate data array to obtain stress values and loss angle values comprises:

dividing the frequency division data and the first intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the first intermediate data array are grouped to obtain a first stress data array;

dividing the frequency division data and the second intermediate data array into a plurality of arrays respectively, and calculating the data after the frequency division data and the second intermediate data array are grouped to obtain a second stress data array and a third stress data array;

sequencing all data in the second stress data array to obtain stress values;

acquiring a middle stress data array according to the first stress data array and the third stress data array;

judging whether each item of data in the middle stress data array is larger than 270 degrees, if so, acquiring a difference absolute value between a data item of which the data is larger than 270 degrees and 360 degrees, and taking the absolute value as a data item corresponding to the data item in the middle stress data array, otherwise, taking the data item as a data item corresponding to the data item in the middle stress data array;

and sequencing all data in the middle stress data array to obtain a loss angle value.

Images