Online re-measurement method for specified length of slab

Abstract

The embodiment of the invention discloses an online re-measurement method for the specified length of a slab, which comprises the steps that a corresponding relation between the pixel position of a roller way and the actual position of the roller way is established; a slab head part and a slab tail part are recognized through a camera, and pixel position of the slab head part and the slab tail part in a shot image are determined; actual positions of the slab head part and the slab tail part on the roller way are determined according to the pixel positions of the slab head part and the slab tail part in the shot image and the corresponding relation; the length of the slab is calculated according to the actual positions of the slab head part and the slab tail part on the roller way, and an actual cutting position of a cutting machine for cutting the slab is calculated; and the cutting machine is controlled to move to the actual cutting position so as to cut the slab. The online re-measurement method disclosed by the invention for the specified length of the slab overcomes problems of high labor force and low accuracy of manual measurement, and effectively solves a problem that guidance and correction of a measurement result for primary cutting are inaccurate.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a method for on-line re-measurement of the length of a slab. Background technique [0002] As the pace of steelmaking production continues to accelerate, customers have increasingly stringent requirements for billet precision. In the billet cutting process, the billet is usually cut by the primary cutting system and the secondary cutting system in sequence, wherein, the primary cutting system cuts the billet into mother blanks, and the secondary cutting system cuts the mother blanks into Multiple sub-blanks, generally one mother blank will be cut into three sub-blanks. [0003] In order to improve the cutting accuracy of the sub-blank, the cutting accuracy of the mother blank directly affects the cutting accuracy of the sub-blank. In order to ensure the sizing accuracy of the sub blank, the length of the mother blank needs to be measured. When the length of the mother...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for re-measurement of the length of the slab on-line to solve the problem of manual measurement in the prior art, which will lead to a

Images