聚苯胺/TiO_2修饰的QCM气敏传感器及湿度影响研究  

A PANI/TiO_2-Based QCM Gas Sensor with Humidity Influence Study

作　　者：傅均[1] 李光[2] 邢建国[1] 

机构地区：[1]浙江工商大学计算机与信息工程学院,杭州310018 [2]浙江大学工业控制技术国家重点实验室,杭州310027

出　　处：《传感技术学报》2011年第4期475-479,共5页Chinese Journal of Sensors and Actuators

基　　金：浙江省教育厅科研项目(Y201010012);浙江省自然科学基金项目(Y1110074);浙江省科技厅重大科技专项和优先主题项目(2008C14100)

摘　　要：用气敏传感器检测三甲胺在食品检验和环境监测等领域具有广泛意义,而湿度影响在这些实际应用中通常无法避免,如何补偿和校正湿度干扰是传感器设计和使用中的重要课题。考察了一种以聚苯胺/TiO2复合材料为敏感膜的QCM气敏传感器在干燥和不同湿度气氛中对三甲胺气体的响应特性,结果表明均呈现出良好的线性敏感性。发现了在湿度干扰下的传感器漂移规律,并通过多元非线性回归方法建立了一定浓度和湿度下的响应数学模型,计算表明用该模型可较大地提高湿度干扰下浓度估算的准确度。Trimethylamine detection by using gas sensors is very meaningful in the area of food inspection and environment monitoring.In those application occasions,however,how to compensate or calibrate the usually-inevitable humidity influence became an important issue in both sensor design and application phase.The response behavior of a QCM gas sensor based on polyaniline/TiO2 composite to trimethylamine at different humidity atmosphere was studied.The results showed very linear sensitivity in all those conditions,and also indicated a pattern of sensor drift due to humidity.A mathematical response model with different concentration and humidity was built by using multiple nonlinear regression method,and this model was also used for calibrating humidity influence,resulting in a significant increasing of accuracy for concentration predicting.

关 键 词：气敏传感器 QCM 导电聚合物 传感器漂移 湿度影响 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]