磨音基频提取在球磨机料位测量中的应用研究  

Study on Application of Fundamental Frequency Extraction of Acoustical Signal in Ball Mill's Material Level Measurement

作　　者：张辛 杜江[1] 张绡绡 舒倩[1] 

机构地区：[1]重庆邮电大学重庆市信号与信息处理重点实验室,重庆400065

出　　处：《工业控制计算机》2018年第5期105-107,共3页Industrial Control Computer

基　　金：国家自然科学基金项目资助(61671094);重庆市科委项目(CSTC2015JCYJA40032)

摘　　要：针对传统磨音特征提取方法复杂和磨机料位测量精度低的问题,提出一种利用磨音基频测量磨机料位的方法。该方法通过分析磨音信号的归一化差值函数计算信号基频,找到空磨、正常磨和饱磨条件下的基频频段,最终建立磨机料位与磨音基频频段的对应关系。实验结果表明,与传统磨音特征提取方法相比,此方法简单高效,可有效地提取磨音信号基频特征,更加精确地反映磨机料位,对提高磨机生产效率和节能降耗具有重要意义。Based on the fact of that the traditional methods of the feature extraction of acoustical signal are complex and the accuracy of mill＇s material level measurement is low,a method to measure material level of mill based on the fundamental frequency of acoustical signal is proposed in this paper.This paper analyzes the fundamental frequency of acoustical signal based on the method of normalized difference function,and finds the fundamental frequency band of empty grinding,normal grinding and full grinding respectively,so as to establish the corresponding relationship between mill＇s material level and fundamental frequency band of acoustical signal.

关 键 词：磨音信号 归一化差值函数 基频提取 磨机料位 

分 类 号：TD453[矿业工程—矿山机电]