Intelligent measuring method for temperature of casting flow surface of continuous casting secondary cooling segment

Abstract

The invention discloses an intelligent measuring method for the temperature of a casting flow surface of a continuous casting secondary cooling segment. The method comprises the steps that a thermodetector is firstly used for measuring the temperature of the last sector segment outlet or straightening segment in real time; then a solidification heat transfer model is built, parameters of the model are corrected offline according to real-time temperature measuring data, and relevant parameters of the solidification heat transfer model are finely adjusted; and finally the temperature of control points is calculated, the calculation results of the temperature of the control points are corrected online in real time, and meanwhile real casting flow temperature distribution information is output. According to the intelligent measuring method, the thermodetector is firstly used for measuring the temperature of the last sector segment outlet or straightening segment in real time, then the solidification heat transfer model is built, the parameters of the model are corrected offline according to the real-time temperature measuring data, and the relevant parameters of the solidification heat transfer model are finely adjusted, that is, a traditional temperature measuring manner and a soft measuring manner are combined into one; and the problems that the precision of building the solidification heat transfer model is insufficient in the soft measuring manner, and temperature measuring result deviation is large due to the fact that the traditional temperature measuring manner is prone to being influenced by environmental disturbance can be solved.

Description

technical field [0001] The invention relates to a temperature measurement method, in particular to an intelligent measurement method for the surface temperature of the strand in the secondary cooling section of continuous casting. Background technique [0002] At present, there are two main ways to realize the temperature measurement on the surface of the secondary cooling strand. [0003] The first category, soft measurement method: [0004] The soft sensor method based on the solidification heat transfer model is the most common. Most of the current continuous casting secondary cooling water control systems use the strand temperature calculated by this model as the basis for secondary cooling water adjustment. However, the calibration of the model is difficult; the model has reductions and assumptions on boundary conditions, the accuracy is not high, and the dynamic adaptability to the environment is poor; the calculation of two-dimensional and three-dimensional models is...

AI Technical Summary

Problems solved by technology

[0009] The infrared temperature measurement method uses the principle of thermal radiation, which can only measure the fixed-point temperature of a small local area on the surface of the object, and is easily affected by external environmental factors, with low accuracy.

[0010] With area array CCD radiation temperature measurement technology, it is difficult to calibrate the optical parameters of the equipment; optical distortion is difficult to overcome; other accurate temperature measurement methods are needed to provide temperature measurement reference points, and the system is relatively large and complex; the acquired data is multi-dimensional and the amount of data is large , requires information fusion processing, which is difficult to process, high in equipment costs, and high in maintenance costs

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