电容式大气折射率测量仪设计与实现  

Design and implementation of capacitive atmospheric refractive index measuring instrument

作　　者：史水娥 胥帅帅 高杨 SHI Shuie;XU Shuaishuai;GAO Yang(School of Electronic and Electrical Engineering,Henan Normal University,Xinxiang 453007,China;Academician Workstation of Electromagnetic Wave Engineering of Henan Province,Xinxiang 453007,China)

机构地区：[1]河南师范大学电子与电气工程学院,河南新乡453007 [2]河南省电磁波工程院士工作站,河南新乡453007

出　　处：《传感器与微系统》2022年第6期90-93,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(62075057);河南省高等学校重点科研项目基础研究项目(19B510006)。

摘　　要：电容式折射率测量仪利用圆筒式电容中气体介电常数不同对电容容值产生影响的特征,以电压控制振荡器(VCO)为主要元器件对LC回路振荡频率进行实时监测,从变化的振荡频率中提取出大气的信息参数并进行数据处理能够计算出大气折射率。最后对三种仪器进行对比,实验结果表明:电容式折射率造价低于微波折射率仪,精度高于“59”型探空仪,并且具有且体积小、重量轻、性价比高等优点,因此在一些工程测量中电容式折射率仪可以代替微波折射率仪和“59型探空仪”。Capacitive refractive index measuring instrument makes use of the characteristic that different gas dielectric constant in cylinder capacitor has influence on capacitance value,takes VCO as the main component to carry out real-time monitoring of LC loop oscillation frequency,extracts atmospheric information parameters from the changing oscillation frequency and calculates atmospheric refractive index through data processing.Finally,the three instruments are compared.The experimental results show that the cost of capacitive refractive index measuring instrument is lower than that of microwave refractive index measuring instrument,and the accuracy is higher than that of"59"radiosonde.In addition,it has the advantages of small volume,light weight and high cost performance.Therefore,the capacitive refractive index meter can replace the microwave refractive index meter and"Type 59 radiosonde"in some engineering measurement.

关 键 词：大气波导 折射率 振荡频率 介电常数 电压控制振荡器 

分 类 号：TH89[机械工程—仪器科学与技术]