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《Electronic Measurement Technology》 2015-06
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Design and Realization of the precision measuring resistance system based on bridge

He Nailong;Sha Yizhuo;Xing Hongyan;Nanjing University of Information Science & Technology,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters;School of electronic and information engineering,Jiangsu Key Laboratory of Meteorological Observation and Information Processing;Atmospheric Observation Technology Center,China Meteorological Administration;  
According to resistance measuring instruments and equipment for precision resistance measurement not enough,and there is a high-cost problem,This article designed a high-precision resistance measurement system based on bridge.The system uses the bridge circuit as the core of the measurement circuit,the use of STM32F103RBT6 SCM to control the core of the system,mainly to achieve acquisition and analog-digital conversion of data to measure the resistance by the reference voltage circuit and A/D module circuit,at the same time,in order to achieve high-precision measurement of the resistance,both hardware decoupling filter and software digital filtering and error compensation methods by reducing the influence of the common lead resistance,contact resistance and other types of noise.The system measures the resistance can display six significant digit by the LCD,that accuracy can reach one hundred thousandth resolution 1mΩ;Simple operation with resistance measurement,stable data acquisition,high sensitivity and low cost characteristics,can measure all kinds of resistance,including resistance precision resistors,and apply to be applied to a variety of occasions experiments,maintenance and engineering development.
【Fund】: 国家自然科学基金(61072133);; 江苏省产学研联合创新资金计划(BY2013007-02 BY2011112);; 江苏省高校科研成果产业化推进(JHB2011-15);; 江苏省“信息与通信工程”优势学科平台资助项目
【CateGory Index】: TM934.1
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