Design And Implementation Of Belted Dyamic Weighing System Based On SCM

With the development of technology of sensor, electronic and computer, the dynamic weighing technology is developing rapidly. Weighing system made significant progress in the digital and intelligent, the research of Weighing system has entered a new phase. Belted dynamic weight equipment is designed for continuous weighing the bulk solids or powders on conveyor belt. And it is widely used in the fields of electricity, chemical, coal and food. However, our related products generally with single function and low precision. Therefore, the improvement of existing weighing devices, research and development functional dynamic weighing system is imperative.This paper presents a belted dyamic weighing system based on SCM, which is a good solution to this problem. In this paper, the overall structure of the weighing system is present first, and detailed analysis of the system model and working principle. It analyzes the cause of dynamic measurement errors, and builds a mathmematical model for dynamic measurement errors of single-idler electronic belt conveyor scale. According to the model, the proposed approach use algorithm to correct errors. Solved the problem of low dynamic measurement accuracy. Then the design of system hardware and software is present. And data processing algorithms and their programming design. System uses 24-bit precision A/D converter AD7730 convert the weighing signal to ensure high-precision measurement results. The result has shown the measurement errors are effectively reduced, and the measurement accuracy can up to 0.2%. The system presented in this paper is characterized by high precision, good stability and achieved the functions of real time monitoring and data preservation. And with the Profibus interface, this system was well positioned to meet the requirements of industrial automation and management modernization.