基于电桥的高精度电阻测量系统的设计与实现
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1. 南京信息工程大学气象灾害预报预警与评估协同创新中心南京210044;2.江苏省气象传感网技术工程中心南京210044;3.中国气象局气象探测中心北京100081

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TN71034

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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


Design and Realization of the precision measuring resistance system based on bridge
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1.Nanjing University of Information Science & Technology, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing 210044,China; 2.School of electronic and information engineering, Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing 210044,China; 3.Atmospheric Observation Technology Center, China Meteorological Administration, Beijing 100081,China

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    摘要:

    针对现有的电阻测量仪器和设备对于电阻测量的精度不高以及价格昂贵的问题,设计了一款基于电桥的高精度电阻测量系统。系统采用电桥电路作为测量电路,利用STM32F103RBT6单片机作为控制核心,主要通过基准电压电路和A/D模块电路实现测量电阻数据的采集与模数转换,同时,为了实现对电阻的高精度测量,通过硬件去耦滤波和软件数字滤波及误差补偿2种方式共同减小了接触电阻、导线电阻以及其他各类噪声的影响。系统在测量电阻时可以通过液晶显示六位有效位数字,即精度可达到十万分之一,分辨率为1 mΩ;它具备电阻测量的操作简单、数据采集稳定、灵敏度高和成本低廉等特点,可以对各类电阻包括精密电阻的阻值测量,并且适用于应用于实验、维修和工程开发等多种场合。

    Abstract:

    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 1 mΩ;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.

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何乃龙,沙奕卓,行鸿彦.基于电桥的高精度电阻测量系统的设计与实现[J].电子测量技术,2015,38(6):92-96

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  • 在线发布日期: 2016-05-27
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