Method for judging quality compliance of sawn steel billet

The invention provides a method for judging the quality compliance of a sawn steel billet, and belongs to the technical field of industrial automation. According to the method, the length L0 of a steel billet is recognized through length recognition equipment based on machine vision, when the steel billet moves to the position over a weighing device, the steel billet is lifted up to be weighed, and after weighing is completed, the steel billet descends to a safe position. According to the measured length and weight of the steel billet and the theoretical density and weight of the steel billet, whether the steel billet meets the requirement or not is rechecked, and when the requirement is not met, an alarm is given. The method can timely find out steel billets which do not meet the requirements and give an alarm, so that unqualified steel billets are prevented from flowing into a production line. And meanwhile, the method can also enable the weighing device to be uniformly stressed during weighing, so that the