Fan-shaped section position sensor fault status-based control method and system

Abstract

The present invention provides a fan-shaped section position sensor fault status-based control method and system. The method includes the following steps that: malfunctioned position sensors in each fan-shaped section are detected; the fault information and historical records of the position sensors are acquired; with the section width and section thickness of a casting blank under pouring which are corresponding to the malfunctioned position sensors adopted as screening conditions, historical data matched with the screening conditions are searched in the historical records; an oil cylinder pressure value set acquired by at least part of other position sensors not including the malfunctioned position sensors at one time point in an actual production process is acquired, and a piece of datawhich is most approximate to the oil cylinder pressure value set is obtained from the historical data; and the pressure value of a malfunctioned position sensor corresponding to the data is applied to an oil cylinder corresponding to the malfunctioned position sensor, and pressure control is performed on the oil cylinder. With the control method and system adopted, the safety of the control of the position sensors in the fan-shaped sections is improved, and the quality of the casting blank can be ensured.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a control method and system based on a fault state of a segment position sensor. Background technique [0002] Position sensors for continuous casting machine segments, e.g. figure 1 As shown, in the environment of high temperature and high humidity, there is no cooling measure. Therefore, the segment position sensor occasionally has problems, and the segment position sensor is the real-time feedback unit of the roll gap value. After the sensor fails, the automatic control system will not be able to Obtaining the actual value of the on-site roll gap makes it impossible to control the position of the segment, and the reliability and safety of the opening of the segment cannot be guaranteed, which directly affects safe production and may even cause accidents such as slab bulging and slab stagnation. Therefore, when there is a problem with the position sensor, how to...

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Problems solved by technology

[0010] For the control method of the above position sensor, the first one, because the deformation of the sector is not considered, the actual production site often has a large pressure deviation of the hydraulic cylinders on both sides of the entrance of the same sector, directly copying the pressure on the other side, resulting in errors Larger; the second type, involving F min and F max The calculation process is more complicated; the third one is that the casting speed changes in various ways during the pouring process, and the casting speed cannot be discretely divided into two points to classify the pressure, and the cylinder pressure is related to the current real-time casting speed. There is no direct and necessary connection; the fourth is an after-the-fact remedy method, which is adjusted only after the size of the billet exceeds the standard, and there is a lag

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