基于LabWindows/CVI的光电三极管虚拟测试仪设计

Design of Photoelectric Triode Tester Based on LabWindows/CVI

摘要:

光电三极管具有伏安,光照,温度,功率等多种特性,正确选择使用某种型号的光电三极管之前需要熟悉其特性,因此需要一种便携、廉价、易操作的测试仪对光电三极管的特性进行测试,文章设计出基于LabWindows/CVI设计了一种光电三极管虚拟测试仪,用高速采集卡和LabWindows/CVI取代传统的模拟电子电路测试仪器完成光电三极管特性的测量；在构建虚拟仪器测试方案的基础上,首先设计了一种信号放大电路用于光电三极管输出信号的放大处理,然后提出了光电三极管特性测量方法,最后阐述了labWindows/CVI环境下的光电三极管测试数据处理过程；实验测试表明:所设计的虚拟测试仪能够准确地对光电三极管的伏安特性和光照特性进行测量,测试结果形象化地显示在仪器面板上,有效地避免因工作时参数过高对光电三极管造成的影响。

Abstract:

Phototransistor has characteristics of voltammetry, light, temperature and power. Users should be familiar with its properties before using some type of phototransistor. So we need a tester which is portable, inexpensive, easy to operate.Based on LabWindows/C-VI ,which is designed of the feature on the photoelectric triode tester, It replaces the traditional analog electr onic circuit testing instrument with high-speed acquisition card and LabWindows/CVI ,on the basis of designing a virtual instrument testing scheme, a signal amplifying circuit is designed for processing the output signal, and then, it puts forward the methods for measuring photoel ectric triode properties. finally, it expounds the data processing of photoelectric triode tester in labWindows/CVI. It can accurately measure the volt-ampere characteristic curve and the illu mination of photoelectric characteristic curve .And the results is visually displayed on the instr ument panel. It can effectively avoid the bad influence of big parameters.