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在研究金属与合金的物理性能、相变、超导体的超导转变时,经常要测定电阻(电阻率)—温度的关系曲线。这类工作要记录大量的实验数据,并要对实验数据进行转换、处理和绘制曲线。若采用手工操作、记录、数据处理、绘制曲线,所需要的工作量大、时间长、效率低,并容易出错。为此,本文利用当前先进的电测技术和计算机技术,建立了一套在77～500K温度范围内电阻连续测量数据采集系统,大大提高了工作效率和测量的可靠性。
In the study of the physical properties of metals and alloys, phase transition, superconducting superconducting transition, often to determine the resistance (resistivity) - temperature curve. This type of work involves recording a large amount of experimental data and converting, processing, and plotting the experimental data. If the manual operation, record, data processing, drawing the curve, the workload required for a long time, low efficiency, and prone to error. Therefore, in this paper, a series of data acquisition system of continuous measurement of resistance in the temperature range from 77K to 500K is established by using the current advanced measurement technology and computer technology, which greatly improves the working efficiency and the reliability of measurement.