Machine vision belt tearing detecting and protecting device

Abstract

The invention provides a machine vision belt tearing detecting and protecting device. A line laser device projects a consecutive laser straight line to the bottom surface of a belt, and CCD (Charge Coupled Device) cameras are used for respectively acquiring images from two sides. The images acquired in real time are transmitted to a tearing detection control computer; the intensity, curvature and other characteristics of the laser streak are extracted to be used for training of a neural network algorithm; and after learning, the network can quickly and accurately detect a tearing accident. In order to acquire clear and stable images at all time, a seal cover is used for sealing a part of the belt conveyer, and an LED light source is used for supplementing light. The double CCD fault-tolerance mechanism avoids noise interference on images due to bug dust, coal slag and other factors, and the structured light technique ensures that the complexity for image processing is reduced from two dimensions to one dimension. The invention has the advantages of low cost, high precision, simple structure and strong practicality, and effectively narrows the belt tearing range by discovering the tearing accident in time.

Description

technical field [0001] The invention relates to a conveyor belt tear detection and protection device, in particular to an alarm and protection device for detecting tearing according to image features and preventing the enlargement of the longitudinal tear of the conveyor belt. Background technique [0002] Belt conveyor is an important tool and equipment for transporting coal in ports, mines, power plants and other enterprises. Longitudinal tearing accidents of conveyor belts caused by impurities often occur. If they are not found in time, the entire belt will be torn and damaged, resulting in Huge economic loss. In order to solve this technical problem, experts at home and abroad try to use many methods for anti-tear detection, such as impact detection method (detection of impact force transmission in belt medium), abnormal force detection of idler roller (analysis of abnormal force of idler roller) status), ultrasonic method (detection of ultrasonic transmission in the be...

AI Technical Summary

Problems solved by technology

Due to certain defects in the principle of many detection methods, or the high cost and cumbersome maintenance in the later period, it is impossible to guarantee the accurate and stable realization of the purpose of belt tear detection.

Among them, the machine vision method is a new detection method proposed in recent years. Its advantage is that it is non-contact and does not require equipment modification. However, due to the complexity of the image processing algorithm, it cannot meet the operational requirements of online real-time detection, and has not been applied in actual production.

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