高精度电阻数据自动采集与动态显示系统设计

测量10-8Ω数量级的电阻或监测导电材料组织的变化,设计高精度电阻数据自动采集与实时显示系用Keithley 2182纳伏表并配用K型热电偶进行电压测量和温度测量,用PF66M型数字多用表结合/输出卡与端子板供给直流恒定电流,并用Delphi开发数据自动采集和实时显示软件。通过对铸铝测分析,该系统工作可靠,显著提高了材料电阻测量的精度与效率。

Design of the system of high-accuracy resistors′ automatic data acquisition and dynamic display

In order to accurately measure the electrical resistance of the order of 10-8 Ω or monitor the structural change of conductive materials, a high accuracy data acquisition system with dynamic displaying was designed. The  Keithley 2182 nano voltmeter was used to measure voltage and temperature together with the Type K thermocouple. The PF66M digital multimeter combined with the Advantech PCI I／O card and the terminal block was employed to supply constant direct current to the samples. The software for the automatic data acquisition and dynamic display was developed based on Delphi. Tests on such a system were made by monitoring the heat treatment process of casting aluminum 101A alloy, which indicated that the system was reliable, accurate and has high efficiency.