一种用于测温量热的自平衡纳伏电位计系统。

Shu-Sing Chang
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引用次数: 3

摘要

介绍了自平衡电位测量系统的工作原理。该原理应用于修改现有的手动操作无热,低压电位器组成的迪塞尔霍斯特环元件。这种修改包括增加簧片继电器,使电位器电压可以通过数字信号来设定。通过将数字电压表或模数转换器和纳伏放大器与改进的电位器相结合,电位器的自平衡可以通过硬件逻辑实现或来自小型计算机的直接数字控制来实现。该自平衡电位计系统在满量程输入100毫伏时的分辨率约为108分之一到10分之一。通过对数据进行实时数字处理,对于缓慢变化的输入信号,可以实现约1 nV或更高的分辨率。该系统的整体精度优于10ppm的电压测量和约1ppm的电压比或电阻测量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A Self-Balancing Nanovolt Potentiometric System for Thermometry and Calorimetry.

The principle of a self-balancing potentiometric system is described. The principle is applied to the modification of an existing manually operated thermo-free, low voltage potentiometer consisting of Diesselhorst ring elements. The modification involves the addition of reed relays which enable the potentiometer voltage to be set by digital signals. By incorporating a digital voltmeter, or an analog-to-digital converter, and a nanovolt amplifier with the modified potentiometer, self-balancing of the potentiometer may be achieved through either hardware logic implementation or direct digital control from a minicomputer. The resolution of this self-balancing potentiometric system for a full scale input of 100 mV is about one to 10 parts in 108. With real-time digital processing of the data, resolution of about 1 nV or better has been achieved for slowly changing input signals. The overall accuracy of the system is better than 10 ppm for voltage measurements and about 1 ppm for voltage ratio or resistance measurements.

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