摘 要:文章对微电阻测量的开关导通耐久测试仪进行设计研究。为达到对微小电阻的精度测量,采用恒流源技术进行扩展,稳定地提取出信号;通过信号放大、信号采集及 A/D 转换显示结果。利用四线测量法,在测量导线电阻不相等的情况保证测量精度,四线法技术消除接触电阻,减少测量误差,提高测量精度;使用 A/D 转换方式将模拟信号转为数字信号,采用 ICL7135转换器保证数据转换的可靠性和稳定性;使用 STM32F103RBT6 微控制器进行运算及后续通信传输处理,保证系统的稳定性和实时性。
关键词:微电阻;开关导通;高精度
DOI:10.19850/j.cnki.2096-4706.2022.05.013
中图分类号:TP368 文献标识码:A 文章编号:2096-4706(2022)05-0050-04
Research on Switch Conduction Durability Tester Based On Microresistance Measurement
KANG Kai
(Liaoning Institute of Science and Engineering, Jinzhou 121007, China)
Abstract: This paper designs and studies the switch conduction durability tester of microresistance measurement. To achieve the precision measurement of the microresistance, it uses continuous current source technology to expand, extracts the signal stably. Through signal amplification, signal acquisition and A/D conversion, the results are displayed. Using the four-line measurement method, it ensures the measurement accuracy when the measurement wire resistance is unequal. The four-line method technology eliminates the contact resistance,it can reduce the measurement error and improve the measurement accuracy. The analog signal is converted to digital signal by using the A/D conversion mode, and it uses the ICL7135 converter, to ensure the reliability and stability of the data transformation. It uses the STM32F103RBT6 microcontroller for the operation and subsequent communication transmission processing, which ensures the stability and real-time performance of the system.
Keywords: microresistance; switch conduction; high accuracy
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作者简介:康凯(1980—),女,汉族,辽宁锦州人,副教授,硕士研究生,研究方向:机械、汽车制造与服务。