计算机反馈控制型单串口热释电系数测试系统  

Pyroelectric Coefficient Testing System with Single Serial Port of Computer Feedback Control

作　　者：杨俊[1] 曾亦可[1] 陈朝晖[2] 罗旖旎[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074 [2]华中科技大学人文学院中心实验室,湖北武汉430074

出　　处：《仪表技术与传感器》2011年第3期82-84,87,共4页Instrument Technique and Sensor

基　　金：国家863计划资助项目(2007AA03Z120);国家标准制修订项目(20064738-T-399)

摘　　要：对热释电系数测试系统进行了研究,用单串口取代多串口,降低了系统连线的复杂度,提高了系统运行的稳定性;加入计算机控温机制,实现了计算机反馈控制加热炉升温速率,极大地提高了升温曲线的线性度,其线性度达到0.37%,从而消除了加热炉升温滞后性带来的测量误差,提高了测量的准确性。用几种热释电材料对现有系统进行了验证,实验表明新热释电系数测试系统的测试结果与理论数据相符,该系统已经可以较准确测量热释电材料的热释电系数。An improvement of pyroelectric coefficient testing system was studied.A single serial-port replaced the multi-serial port,which reduced complexity of the system and increased stability.A computer feedback control heatingrate was designed for the heater construction,which eliminated the measurementerror caused by the temperature lag of the heater construction.It improved the linearity of line heating curve,and the linearity reached 0.37%.Thereby it enhanced the accuracy of the measurement system.Several kind of pyroelectric materials were used to prove the superiority of the new system,and theexperimental results showed that the pyroelectric coefficient of pyroelectric materials measured by the new system were in accord with the theoretical values.Therefore,this system can accurately measure the pyroelectric coefficient of the materials.

关 键 词：直接法 热释电系数 温度控制 升温速率 

分 类 号：TH765[机械工程—仪器科学与技术] TP311[机械工程—精密仪器及机械]