A Study on Modulation and Demodulation of Microwave Measurement Signal

摘要：

Because of the frequency of microwave is so high that its difficult to direct analysis of the attenuation of microwave energy to know the water content in crude oil. However, it is simple to use a 1 KHz square wave to modulate it and analysis the amplitude changes of low frequency square wave which output from demodulation to measure the water content in crude oil. So this paper designs a modulation and demodulation microwave measurement signal processing system, including detector, selected frequency amplifier, rectifier circuit, filter circuit, A/D converter, MCU system and so on, to realize the detect of microwave measurement signal. After software simulation and experimental demonstration, this system can detect microwave measurement signal which are modulated and demodulated accurately and digital display the water content in crude oil. It has some advantages, such as good stability, little error, low cost and so on.

关键词： lKHz square, wave Detector Selected frequency amplifier rectifier circuit filter circuit

作者: Yang Yu Yong Wan

作者单位: School of information Science and Engineering Shenyang university of technology Shen Yang, china

会议类型: 国际会议

会议名称: 2010 International Conference on Signal and Information Processing(2010年IEEE信号与信息处理国际会议 ICSIP2010)

会议地点: 长沙

会议语种:英文

页码: 560-563

在线出版日期: 2010-12-14（万方平台首次上网日期，不代表论文的发表时间）