中图分类号： TN705；TP274 文献标识码： A DOI：10.16157/j.issn.0258-7998.191290 中文引用格式： 代少升，李金鑫. 基于DSP的磨机物料监测系统设计[J].电子技术应用，2020，46(9)：98-101. 英文引用格式： Dai Shaosheng，Li Jinxin. Design of mill material moitoring system based on DSP[J]. Application of Electronic Technique，2020，46(9)：98-101.
Design of mill material moitoring system based on DSP
Dai Shaosheng，Li Jinxin
College of Communication and Information Engineering，Chongqing University of Posts and Telecommunications， Chongqing 400065，China
Abstract： In order to solve the problem that monitoring the working load of the ball mill during its operation, a monitoring system of the mill material based on digital signal processor(DSP) is designed. The hardware of the system is mainly composed of four kinds of circuit, i.e., the power circuit, the grinding sound acquisition circuit, the signal processing circuit and the Liquid Crystal Display(LCD) data display circuit. The system collects the grinding sound signal through the pickups, transforms grinding signal in time domain to frequency domain by discrete Fourier transform(DFT), calculates grinding energy according to Parseval′s theorem. Finally, the system gets the relationship between energy and material by polynomial fitting. The system processes the grinding sound signal in real time by DSP. Meanwhile, for the monitor personnel can optimize the production process, the processed spectrum, sound intensity(decibel value) and material ratio are displayed on the LCD touch screen. The experimental results show that the system can effectively monitor the working condition of the mill and calculate the load ratio of the mill, and it has been applied in the actual operation of the ball mill.
Key words : ball mill；grinding；material monitoring；digital signal processor(DSP)