Measurement system of ultra-low moisture content in oil based on the microwave transmission method

被引:4
作者
Zeng, Qunfeng [1 ]
Li, Gaokai [1 ]
Liu, Qi [1 ]
Jiang, Hao [1 ]
Wang, Zhao [1 ]
机构
[1] Xi An Jiao Tong Univ, Key Lab, Educ Minist Modern Design & Rotor Bearing Syst, Xian, Peoples R China
关键词
measurement system; microwave transmission method; moisture content; quenching oil;
D O I
10.1002/mop.33451
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
As an important index of industrial oil, moisture content affects the performance of oil. With the increase of requirement to the oil quality, the measurement of ultra-low moisture content is gradually concerned. To achieve nondestructive measurement of the moisture content in oil, this paper analyzes the principle of dielectric loss of oil-water mixture and proposes a measurement system based on the microwave transmission method. The hardware of the system, horn antenna, and experimental device were designed and built. The system uses a subtracter circuit together with a high-performance microwave chip and high-precision analog-to-digital converter to detect 1dB microwave attenuation. The results showed that the system can measure the moisture content of 0.01%-0.8% in quenching oil and the single detection absolute error is less than +/- 0.05%, and the average detection absolute error of 10 detections is less than +/- 0.02%. This study is useful for nondestructive detection of the moisture content in oil and provides a reference for related product development.
引用
收藏
页码:47 / 53
页数:7
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