KR-102964638-B1 - CONTINUOUS CASTING BREAKOUT (BO) EARLY DETECTION AND CONTROL INTERLOCK SYSTEM

KR102964638B1KR 102964638 B1KR102964638 B1KR 102964638B1KR-102964638-B1

Abstract

The present invention relates to a continuous casting BO early detection and control linkage system for detecting a Break Out (BO) in advance in a continuous casting process and linking it with the control of the casting equipment. The system according to the present invention includes an image acquisition unit that captures the casting equipment to acquire a continuous frame image, and a control judgment unit that detects a pattern in which fine high-brightness dots occur in multiple numbers and move in a dispersed scattering manner from the frame image to calculate a blizzard index, and determines a BO precursor or BO progress state based on the blizzard index.

Inventors

장철용

Dates

Publication Date: 20260512
Application Date: 20260305

Claims (7)

In a system for detecting and controlling Break Out (BO) in advance in a continuous casting process, An image acquisition unit that photographs casting equipment to acquire continuous frame images; and A control judgment unit comprising a control judgment unit that detects a movement pattern in which fine high-intensity dots are generated in multiple directions and scattered from the above frame image to calculate a blizzard index, and determines a BO precursor or BO progression state based on the blizzard index. Continuous casting BO early detection and control linkage system.
In paragraph 1, The method further comprises a process factor receiving unit that receives frictional energy data calculated based on at least one process sensor value among casting speed, mold vibration, load, or position information in the above-mentioned casting facility process. Continuous casting BO early detection and control linkage system.
In paragraph 2, The above control judgment unit is characterized by determining a BO precursor or BO progression state by aligning at least one of the moving average of brightness values or the frictional energy data on the same time axis in addition to the above blizzard indicator. Continuous casting BO early detection and control linkage system.
In paragraph 2, The above control judgment unit is characterized by using the brightness difference between frames to decompose clusters of fine high-brightness pixels into blobs, analyzing the number, area, and direction of movement of the blobs, and determining a pattern in which multiple small-area blobs scatter in all directions as a blizzard pattern. Continuous casting BO early detection and control linkage system.
In paragraph 2, The above control judgment unit is characterized by generating a baseline by applying a moving average to the average brightness and central brightness of the detection area. Continuous casting BO early detection and control linkage system.
In paragraph 5, The above control judgment unit is characterized by calculating the difference between the brightness value of the current frame and the reference line to calculate the brightness deviation. Continuous casting BO early detection and control linkage system.
In paragraph 6, The control judgment unit calculates a moving average and a rate of change for blizzard indicators, brightness deviations, and frictional energy data, respectively, accumulates the values to form a BO risk level, and is characterized by classifying the BO risk level into a BO precursor stage or a BO progression stage when the BO risk level exceeds a preset standard. Continuous casting BO early detection and control linkage system.

Description

Continuous Casting Breakout (BO) Early Detection and Control Interlock System The present invention relates to a technology for detecting a Break Out (hereinafter “BO”) occurring in a continuous casting process in advance and linking the result to the control of casting equipment. More specifically, the invention relates to a continuous casting BO early detection and control linkage system that analyzes blizzard-like fine scattering and changes in screen brightness from images taken of a specific area of a continuous casting facility, and temporally combines this with frictional energy calculated based on process factors measured in the casting process to determine the rolling stage and progress stage of BO early, and links the determination result to facility control such as casting speed, cooling conditions, and interlock. In the continuous casting process, BO is a phenomenon in which the shell of a cast slab ruptures locally while solidifying, causing molten steel inside to leak out. It is a serious accident that results in equipment damage, fire, worker safety accidents, prolonged production stoppage, and massive economic losses. In order to prevent such BO, conventional methods have mainly been used to monitor for abnormalities in process sensor values such as mold vibration, casting speed, load, and temperature, or to generate an alarm when a certain threshold is exceeded. However, these conventional methods are structured to detect abnormalities only after the BO has already progressed significantly, which limits their ability to prevent actual accidents in advance. Furthermore, methods relying solely on process sensors fail to directly reflect early signs, such as localized weakening or micro-ruptures in the shell, making it difficult to interpret the "formation process" of the BO step-by-step. Meanwhile, although technology for monitoring the casting process using cameras has recently been proposed, fine high-intensity spots or scattering phenomena appearing in the images are mixed with light reflections, dust, steam, etc., so conventionally, it was common to treat these phenomena as simple noise or exclude them as unreliable information. As a result, although image information has the potential to capture precursors of BO, it has been difficult to utilize it for actual process control. FIG. 1 is a flowchart illustrating the overall flow of a continuous casting BO early detection and control linkage system according to one embodiment of the present invention, and FIG. 2 is a diagram illustrating an example of an image corresponding to the normal range in a continuous casting BO early detection and control linkage system according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating an example of a critical state image in which a large-area brightness diffusion in the form of a cloud and strong scattering phenomena occur to a maximum value in a continuous casting BO early detection and control linkage system according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a precursor state image in a continuous casting BO early detection and control linkage system according to an embodiment of the present invention, in which snow is present but large-area brightness diffusion caused by clouds has not yet occurred. FIG. 5 is a diagram illustrating an example of an image in which a single frame or short-term disturbance occurs in a continuous casting BO early detection and control linkage system according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of an image including a process of transitioning from a snow stage to a cloud stage when BO is in progress or imminent in a continuous casting BO early detection and control linkage system according to an embodiment of the present invention, and Figure 7 is a conceptual diagram illustrating the state in which the judgment result regarding BO pre-production or BO progress is linked to the control of the actual casting equipment. Preferred embodiments according to the present invention will be described in detail below with reference to the attached drawings. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the attached drawings. However, the present invention is not limited by the embodiments disclosed below but can be implemented in various different forms; these embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. The present invention is defined only by the scope of the claims. Furthermore, in describing the present invention, if it is determined that related known technologies, etc., may obscure the essence of the present invention, a detailed description thereof will be omitted. The continuous casting BO