JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (4): 133-137.

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

WANG Ze-jing1,2, QIN Jing-yu1*, MI Chun-xu1   

  1. 1. School of Materials Science and Engineering, Shandong University, Jinan 250061, China;
    2. School of Opto-electronic Information Science and Technology, Yantai University, Yantai 264005, China
  • Received:2009-07-28 Online:2010-08-16 Published:2009-07-28

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Abstract:

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.
 

Key words: data acquisition, serial communication, resistors, temperature measurement

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