Control system for improving accuracy of belt weighers under bad working conditions and control method of control system

Abstract

The invention provides a control system for improving accuracy of belt weighers under bad working conditions. A driving point belt weigher is installed on a driving conveying belt at a driving point,and a signal and a corresponding speed signal are transmitted to a central controller together; a main belt weigher is installed on a subsequent main conveying belt of the driving conveying belt, anda flow signal and a corresponding speed signal are transmitted to the central controller together; the central controller collects weight signals, the flow signals and the speed signals sent by the driving point belt weigher and the main belt weigher, the corrected flow signals of the driving point belt weigher are obtained and sent to a superior control computer, and real-time output of accurateflow values of the driving point belt weigher is realized. According to the control system for improving the accuracy of the belt weigher under the bad working conditions, a front driving point belt weigher adopts a single-point suspension type weighing unit in an array type belt weigher, and the subsequent main belt weigher adopts the array type belt weigher, according to a learning and correcting "voltage-flow" curve function of the system side, the measurement accuracy of the front simple belt weigher can reach the weighing accuracy being less than 0. 5%.

Description

technical field [0001] The invention relates to belt scale control equipment, specifically a control system for improving the precision of belt scales under severe working conditions, and belongs to the technical field of belt scale adjustment equipment. Background technique [0002] In the process of conveying bulk materials, it is often necessary to measure the conveyed materials. In some applications, limited by the on-site process conditions, the working conditions are often harsh and the equipment space is narrow, so it is impossible to install large-scale metering devices, nor Have the stable use conditions of the metering device. [0003] In order to save energy, modern coal mines often adopt frequency conversion control for the main underground coal conveying belt, so as to control the running speed of the belt according to the amount of coal conveyed. Due to the large capacity of the driving motor of the belt conveyor, often up to thousands of KW, reducing the high...

AI Technical Summary

Problems solved by technology

However, the belt scale has high requirements on the use environment, especially the belt conveyor itself is required to be in good working condition; affected by the harsh use environment, the belt scale needs to be maintained and calibrated frequently to ensure normal use; due to the harsh site conditions, this One requirement is difficult to guarantee, which limits the use of belt scales under this condition

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