基于Matlab的单臂热电元件性能测试系统设计

Design of properties measurement systems for single arm thermoelectric components based on Matlab

小功率单臂热电元件是介于热电材料和器件之间的过渡元件,其性能参数既可以表征热电材料的性能,也可以适当表征热电器件的性能,因而构建工况条件下单臂热电元件测试系统有着重要的意义。采用台式万用表、双通道温度表及工控板实现了仪器与电脑可控通信,并采用Matlab进行上位机软件设计实现系统的自动测试功能。利用Matlab高效的数据处理能力极易计算得到所需数据。在工况条件下测试了用CaMnO3热电材料制成的单臂热电元件的性能。通过数据分析和处理,既得到表征材料性能的参数,也得到了表征器件性能的参数,从而实现了材料和器件的综合性能测试。

The low-power thermoelectric component with single arm is a transition component between thermoelectric materials and devices. The properties of both thermoelectric materials and devices can be characterized by those of the transition component. Therefore, it is of great significance to construct test systems for thermoelectric devices with single arm under working conditions. In this paper, a computer-controlled communication apparatus was composed of desktop multimeter, two-channel thermometer and IPC board, implemented the automated testing by using the PC software based on Matlab. What＇s more, it was easy to calculate the required data by using the efficient data processing capability of Matlab. As an example, a single arm thermoelectric device made from thermoelectric material CaMnO3 was measured. By using an appropriate data analysis and processing, the properties of the sample from the perspective of materials or devices were obtained, so the integrated design of thermoelectric materials and devices was achieved.