High-speed wire rod quality defect diagnosis and traceability method based on distributed Bayesian network

Abstract

The invention discloses a high-speed wire rod quality defect diagnosis and tracing method based on a distributed Bayesian network. The method comprises the following steps: firstly, collecting normalworking condition data of a steel high-speed wire rod rolling process, decomposing a whole production process into a plurality of sections by combining a process mechanism and production process big data, then constructing a distributed Bayesian network with a multi-layer structure based on data characteristics and process knowledge, and constructing a local monitoring statistic, a global monitoring statistic, a local contribution degree and a global contribution degree, and finally realizing high-speed wire rod quality defect diagnosis and traceability through information fusion. By applyingthe method, deep-level quality anomaly tracing, propagation path analysis and root positioning in the high-speed wire rolling process can be achieved, and safe and stable operation of the high-speed wire rolling process is guaranteed.

Description

technical field [0001] The invention belongs to the field of industrial process control, in particular to a high-speed wire quality defect diagnosis and traceability method based on a distributed Bayesian network. Background technique [0002] For a long time, wire products in the iron and steel industry have been important and widely used metal products in my country's national economic construction. The process technology and equipment level of my country's wire rod production line are improving day by day. The annual production capacity of a production line has grown from tens of thousands of tons in the past to more than one million tons at present, and the production efficiency has been greatly improved. Important features of wire rod production are high rolling speed, high product quality and high equipment efficiency. The production of high-speed wire has the characteristics of continuous, high-speed and high temperature, and it often has the following quality defect...

AI Technical Summary

Problems solved by technology

The production of high-speed wire has the characteristics of continuous, high-speed and high temperature, and it often has the following quality defects: decarburization, cracks, out-of-ovality, strength, area shrinkage, stuttering, ears, folding, concave-convex pits, torsion, scratches , poor strip shape, substandard dimensions on both sides of the sky and earth, indentation, etc.

However, the traditional data-driven modeling method is difficult to apply to large-scale data, and cannot meet the requirements of high-speed wire rod diagnosis and traceability. Traceability brings great difficulties; (2) High real-time requirements, the wire rolling speed can reach 200m / s; (3) The data scale is large, and the annual cumulative data capacity of a single production line reaches TB level

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