Flying shear control system and control method based on machine vision

Abstract

The invention provides a flying shear control system and control method based on machine vision. The controls system comprises a controller, flying shears, a camera, a rolling mill and a rolled piece located on a roller bed of the rolling mill. The camera is arranged between the flying shears and the rolling mill, and is located above the position perpendicular to the roller bed. The controller receives information from the camera. The controller controls and triggers the motion of the flying shears. The flying shears are located within the image range of the camera. The center line between the flying shears and the roller bed is aligned to the center line of an image of the camera. The color of a shear edge center line of the flying shears is different from surrounding background colors. The industrial high-speed camera is used for accurately measuring the position of the rolled piece and triggering the flying shears to be started, and the trouble and unregularity of a method that errors in the prior art can only be compensated by repeatedly testing and correcting factors are avoided. Control precision is improved, the flying shear control system and control method can automatically adapt to steel types of any specification and any piece rolling speed, and the parameters do not need to be tested or corrected.

Description

technical field [0001] The invention relates to the field of automatic control of steel rolling flying shears, in particular to a machine vision-based flying shears control system and a control method thereof. Background technique [0002] The function of rolling steel flying shear is to realize continuous fixed-length shearing or accidental broken shearing of rolling steel without stopping the running of the rolling mill. [0003] The rolling steel flying shear control system used in the prior art measures the speed of the rolling piece leaving the last stand by measuring the distance between two photoelectric cells and the time it takes for the rolling piece to pass through the two photoelectric cells in turn. Calculate the distance traveled by the rolling piece during the period from the start of the flying shear to the arrival at the shearing point. Calculate the delay time for the flying shear to start according to the predetermined length of the rolled piece to be cut...

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