GUO Zhiheng^a, KAN Zhe^a, ZHANG Shi^b, CONG Qiumen^a

(a. School of Information and Control Engineering；b. School of Computer and Communication Engineering,Liaoning ShiHua University, Fushun 113001, China)

Abstract: In order to realize the on-line detection of milk powder moisture content in industrial environment and obtain the appropriate test conditions for the capacitance method to detect milk powder moisture content, the correlation between milk powder moisture content and dielectric parameter capacitance was studied, and the influence of moisture content, measurement frequency and compactness on capacitance measurement was studied by orthogonal test method. The results of orthogonal test show that the sensitivity of sensor capacitance is the highest when the moisture content of milk powder varies from 5% to 8%.The test conditions that have little influence on the measurement of sensor capacitance are the measurement frequency ≥100 kHz and the moderate compacting of milk powder.

Keywords: capacitance method；milk powder moisture content；dielectric property；orthogonal experiment

中图分类号：TH83                               文献标志码：A

文章编号：1008-5548(2019)06-0019-05

DOI:10.13732/j.issn.1008-5548.2019.06.004

收稿日期： 2019-03-31， 修回日期：2019-09-16在线出版时间：2019-09-29 13:35。

基金项目：国家自然科学基金项目，编号：61803191；辽宁省教育厅科研项目，编号：L2015300。

第一作者简介：郭志恒(1968—)，男，博士，副教授，硕士生导师，研究方向为无损检测技术、电学成像技术。E-mail：guozhiheng@sohu.com。