基于静电传感器的稀相气力输送流动特性分析  

Flow characteristics analysis of dilute phase pneumatic conveying based on electrostatic sensor

作　　者：王超[1] 高文宾 张靖宇[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《电子测量与仪器学报》2016年第9期1320-1326,共7页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(61072101);新世纪优秀人才支持计划(ncet-10-0621)资助项目

摘　　要：气力输送在电力、化工和冶金等工业领域应用广泛,在线分析颗粒流动特性对于节能减排和安全稳定输送具有重要意义。利用静电传感器的局部敏感特性,采用Hilbert-Huang变换对稀相气力输送过程中不同流动状态的动态特性进行研究,并且分析了管道中不同位置静电信号的频率特性。通过分解后的细节信号与原始信号的相关性分析,发现高频细节信号imf1~imf3所占的能量比可以作为流动状态的表征参数。这对于进一步研究气力输送的稳定性有重要的理论和实践意义。Pneumatic conveying has been widely applied in the power, chemical and metallurgical industries. Online analysis of the particulate flow characteristics plays an important part in energy conservation, emission reduction and safe operation. In this paper, an electrostatic sensor with local electrostatic sensibility was used in studying dynamic characteristics of different flow states in the pneumatic conveying process, and Hilbert-Huang transform method was adopted to characterize the complexity of the particles motion. The frequency characteristics of electrostatic signals in different locations of the pipeline were analyzed. Through the correlation analysis between the detail signal and the original signal, it was concluded that the energy ratio of the high frequency detail signal imfl - imf3 could be used as a characterization parameter of the flow state. It has important theoretical and practical significance for further study on the stability of pneumatic conveying.

关 键 词：稀相气力输送 静电传感器 HILBERT-HUANG变换 本征模态函数 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] TN06[自动化与计算机技术—控制科学与工程]