Strip steel section shape detecting and identifying method

Abstract

The invention relates to a strip steel section shape detecting and identifying method, belonging to the technical field of steel rolling quality control. The method comprises the following steps of: dividing a detector into three groups and fitting three intervals of the width of the strip steel into three polynomial approximation curve functions; enabling the three polynomial approximation curves to be in smooth and transition connection; establishing an initial constraint condition and simultaneous equation adding the constraint condition and calculating the polynomial approximation coefficient of the three polynomial approximation curve functions; and using the strip steel section shape curve described by the three approximation curve functions as the detection result to determine the needed feature parameter of the strip steel section. The method can obtain the actual thickness data of the strip steel at a plurality of measurement passages in real time, carries out necessary processing and identifying on the discrete thickness detection data at the passages to obtain the feature parameter of the strip steel section output to a plate-type front feedback control system to improve the plate-type quality of a cold rolling outlet.

Description

technical field [0001] The invention relates to a detection and identification method, in particular to a strip steel section shape detection and identification method, which belongs to the technical field of rolling steel quality control. Background technique [0002] The transverse thickness distribution of the incoming strip steel at the entrance of the cold rolling mill has a great influence on the transverse thickness distribution and flatness of the strip steel after rolling. A strip steel cross-section detector is installed at the entrance of the tandem cold rolling mill. Based on the measured cross-sectional shape information of the hot-rolled incoming material, feed-forward control of the strip shape is performed on each stand of the tandem cold rolling mill, especially the upstream stand. The premise of the influence of the shape fluctuation of the rolling incoming material section (such as convexity, wedge shape, edge drop, etc.) Quality is of great importance. ...

AI Technical Summary

Problems solved by technology

Therefore, the method of one-time fitting of all the thickness measurement data points of the entire section with a single curve on the strip section without partitioning the crown meter can easily cause fitting curves in some parts (such as edges). The deviation from the measured value is too large,

[0006] The search found that the Chinese patent application with the application number of 200410017247.0 discloses a flatness detection and identification method, which can timely and accurately obtain the quantitative data of strip strip shape, but cannot detect the transverse thickness distribution of the strip, and cannot obtain the cross section of the strip. surface shape feature

Images