LC无源无线气体传感器的制备及对NH_3气敏特性的研究  

Preparation of LC Wireless Passive Gas Sensor and Study on the Gas Sensing Properties of Ammonia Gas

作　　者：郭晓威 谭秋林[1,2] 郭彦杰 周天浩 翟成瑞[1] GUO Xiaowei1,2, TAN Qiulin1,2, GUO Yanjie1,2, ZHOU Tianhao1, ZHAI Chengrui1(1. Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China ; 2. Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学电子测试技术国家重点实验室,太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《传感技术学报》2017年第11期1643-1646,共4页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61471324)

摘　　要：采用酸化后的碳纳米管与聚苯胺掺杂作为传感器的气敏材料。通过丝网印刷技术将无铅铝浆印刷在氧化铝陶瓷基板上形成电感线圈,并将制备好的气敏材料涂覆到电感线圈上,制备出LC谐振式无源气体传感器。制作成气体传感器后在NH3气氛中进行测试分析,实现了在密闭环境下的非接触测量。重点分析了在室温下NH3气体的浓度对传感器谐振频率f0的变化及响应恢复时间的影响,结果表明气体浓度在300×10-6时,传感器的灵敏度为4.499 MHz。By using acidified carbon nanotubes doped with polyaniline as gas sensitive material of the sensor. The prepared gas sensitive material is coated with the inductance capacitance coupled circuit which is prepared by screen printing technology,fabricating LC resonant passive gas sensor. In the NH3 atmosphere,we can test the prepared gas sensor so as to achieve the non-contact measurement in a closed environment. Via focusing on the analysis on the influence of the concentration of NH3 gas to the resonant frequency of the sensor and the response recovery time at room temperature,the results show that the sensitivity of the sensor is 4.499 MHz at 300×10^（-6）.

关 键 词：无线无源传感器 碳纳米管 气敏特性 LC谐振 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]