CN-115574763-B - Index processing method and system for strip steel surface morphology distribution uniformity

Abstract

The invention discloses an index processing method and system for strip steel surface morphology distribution uniformity, aiming at the problem that the index for evaluating strip steel surface morphology distribution uniformity is not available at present, and carrying out interpolation and Fourier transformation on the plurality of height data to obtain an amplitude spectrum, and obtaining the frequency concentration of the data based on the amplitude spectrum to be used as an index for representing the uniformity of the surface topography distribution of the strip steel, thereby solving the problem of index deficiency for evaluating the uniformity of the surface topography distribution of the strip steel at present.

Inventors

• WANG XINXIN
• ZHANG LIANGLIANG
• LIU PENG
• WANG CHUNHAI
• YU YANG
• REN XINYI
• WANG YONGQIANG
• YU MENG
• WEN JIE
• WANG LIN
• LI GONGYIN
• LIN HAIHAI

Assignees

• 首钢集团有限公司

Dates

Publication Date

20260512

Application Date

20220930

Claims (8)

1. 1. An index processing method for uniformity of strip steel surface morphology distribution, which is characterized by comprising the following steps: acquiring a plurality of height data of the surface of the strip steel in a measuring range; performing linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the plurality of interpolation data comprises the plurality of height data; performing Fourier transform based on the interpolation data to obtain amplitude spectrums corresponding to the interpolation data; Calculating a frequency concentration of the number of interpolated data based on the magnitude spectrum, comprising: using the formula Determining the frequency concentration, wherein J is the frequency concentration, Is the center frequency, is the amplitude spectrum K is the number of frequencies, N is the number of interpolation data, and the frequency concentration is used for representing the uniformity of the surface morphology distribution of the strip steel.
2. 2. The method of claim 1, wherein, After the plurality of height data of the strip steel surface in the measuring range are obtained, the method further comprises the steps of carrying out low-pass filtering processing on the plurality of height data to obtain a plurality of corresponding filtering data; and performing linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the linear interpolation is performed based on the plurality of filtering data to obtain the plurality of interpolation data.
3. 3. The method of claim 1, wherein the linearly interpolating based on the plurality of height data to obtain a plurality of interpolated data comprises: And performing linear interpolation between adjacent height data of the plurality of height data to obtain the plurality of interpolation data.
4. 4. An index processing system for uniformity of surface morphology distribution of strip steel is characterized by comprising: the acquisition module is used for acquiring a plurality of height data of the surface of the strip steel in a measuring range; The interpolation module is used for carrying out linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the plurality of interpolation data comprise the plurality of height data; the transformation module is used for carrying out Fourier transformation based on the interpolation data to obtain amplitude spectrums corresponding to the interpolation data; a calculation module for calculating the frequency concentration of the interpolation data based on the amplitude spectrum, in particular for using a formula Determining the frequency concentration, wherein J is the frequency concentration, Is the center frequency, is the amplitude spectrum K is the number of frequencies, N is the number of interpolation data, the frequency concentration is used for representing the uniformity of the surface topography distribution of the strip steel, and the frequency concentration is used for representing the uniformity of the surface topography distribution of the strip steel.
5. 5. The index processing system of claim 4, wherein, The system also comprises a filtering module, a filtering module and a processing module, wherein the filtering module is used for carrying out low-pass filtering processing on the plurality of height data to obtain a plurality of corresponding filtering data; The interpolation module is specifically configured to perform linear interpolation based on the plurality of filtering data to obtain the plurality of interpolation data.
6. 6. The index processing system of claim 4, wherein the interpolation module is specifically configured to perform linear interpolation between adjacent height data of the plurality of height data to obtain the plurality of interpolated data.
7. 7. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any of claims 1-3.
8. 8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 1-3 when the program is executed.

Description

Index processing method and system for strip steel surface morphology distribution uniformity Technical Field The application relates to the technical field of steel rolling, in particular to an index processing method and system for uniformity of strip steel surface morphology distribution. Background The surface morphology of the strip steel refers to the degree of microscopic fluctuation of the surface of the strip steel, and is generally classified into three stages according to wavelength, namely shape size (> 10 mm), waviness (1 mm-10 mm) and roughness (< 1 mm). The surface morphology is critical to the use of the strip steel, for example, roughness can affect the stamping performance of the automotive sheet, and waviness can affect the plating performance of the automotive sheet. If the uniformity of the surface morphology distribution is poor, the punching performance and the plating performance of the automobile sheet are lowered. However, no index for evaluating the uniformity of the surface morphology distribution of the strip steel is available at present. Disclosure of Invention The invention provides an index processing method and system for strip steel surface morphology distribution uniformity, which are used for solving or partially solving the problem of index deficiency in the existing evaluation of strip steel surface morphology distribution uniformity. In order to solve the technical problems, the invention provides an index processing method for the uniformity of the surface morphology distribution of strip steel, which comprises the following steps: acquiring a plurality of height data of the surface of the strip steel in a measuring range; performing linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the plurality of interpolation data comprises the plurality of height data; performing Fourier transform based on the interpolation data to obtain amplitude spectrums corresponding to the interpolation data; and calculating the frequency concentration degree of the interpolation data based on the amplitude spectrum, wherein the frequency concentration degree is used for representing the uniformity of the surface topography distribution of the strip steel. Preferably, after the plurality of height data of the surface of the strip steel in the measuring range are obtained, the method further comprises the steps of carrying out low-pass filtering processing on the plurality of height data to obtain a plurality of corresponding filtering data; and performing linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the linear interpolation is performed based on the plurality of filtering data to obtain the plurality of interpolation data. Preferably, the performing linear interpolation based on the plurality of height data to obtain a plurality of interpolation data includes: And performing linear interpolation between adjacent height data of the plurality of height data to obtain the plurality of interpolation data. Preferably, the calculating the frequency concentration of the plurality of interpolation data based on the amplitude spectrum includes: using the formula And determining the frequency concentration, wherein J is the frequency concentration, A center is the center frequency, the maximum value in [ k 1,k2 ] in the amplitude spectrum, k is the number of frequencies, and N is the number of interpolation data. The invention also discloses an index processing system of the uniformity of the surface morphology distribution of the strip steel, which comprises: the acquisition module is used for acquiring a plurality of height data of the surface of the strip steel in a measuring range; The interpolation module is used for carrying out linear interpolation based on the plurality of height data to obtain a plurality of interpolation data, wherein the plurality of interpolation data comprise the plurality of height data; the transformation module is used for carrying out Fourier transformation based on the interpolation data to obtain amplitude spectrums corresponding to the interpolation data; The calculating module is used for calculating the frequency concentration degree of the interpolation data based on the amplitude spectrum, and the frequency concentration degree is used for representing the uniformity of the surface morphology distribution of the strip steel. Preferably, the system further comprises a filtering module, a filtering module and a processing module, wherein the filtering module is used for performing low-pass filtering processing on the plurality of height data to obtain a plurality of corresponding filtering data; The interpolation module is specifically configured to perform linear interpolation based on the plurality of filtering data to obtain the plurality of interpolation data. Preferably, the interpolation module is specifically configured to perf