热敏电阻伏安特性自动测试系统  

Automatic measurement system for voltage-current characteristics of thermistor

作　　者：黎步银[1] 周东祥[1] 付明[1] 黄正伟[1] 

机构地区：[1]华中科技大学电子科学与技术系

出　　处：《华中科技大学学报（自然科学版）》2002年第3期86-88,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目 (715 0 0 6 0 0 70 )

摘　　要：利用PC机通过RS 2 32C标准串行接口同智能万用表组成自动测试系统 ,通过并行打印接口控制外围接口电路 ,实现电压程序控制及通道自动转换 ,并实现了对热敏电阻伏安特性曲线的自动测试和自动数据处理 .该系统能同时对 10只热敏元件进行测试 ,各个通道具有单独击穿自动保护电路 .程序由VISUALC ++6 .Automatic measurement system for voltage current characteristics of thermistor consists of microcomputer and intellectual instrument by a RS 232C interface. Peripheral interface circuits are controlled by personal computer by a printer parallel interface, realizing channel′s automatic transformation, the voltage programmable control by binary code method, automatic measurement for voltage current characteristics curves of thermistors and its automatic data processing. Ten thermistors can be measured once a time and each channel has automatic over current protection. The reliability of the system is improved significantly. Measuring and controlling software is designed by VISUAL C++6.0 language.

关 键 词：自动测试系统 热敏电阻 伏安特性 测试原理 电路设计 PC机 RS-232C串行接口 智能万用表 

分 类 号：TN373[电子电信—物理电子学] TP274[自动化与计算机技术—检测技术与自动化装置]