非平衡电桥原理的简易水质检测仪

Simple Detector of Water Quality Based on Non-balanced Bridge Principle

惠斯通电桥是《大学物理实验》中的经典实验,它利用平衡电桥来精确测量电阻值.在大学实验课上,它只能用来测量固态的电阻,笔者运用电桥电路的原理制作了一款可以用来精确测量液体电阻值的装置,可以用于评估被测水体的质量.最后应用该装置对不同水体进行了一系列研究,得到一系列有意义的结果.

The Wheatstone Bridge is a classic experiment in College Physics Experiments that uses a balanced bridge to accurately measure resistance values. In college lab classes, it can only be used to measure the resistance of solids. In this paper, the principle of the bridge circuit is applied to create a device that can be used to accurately measure the resistance value of liquids, which can be used to evaluate the quality of the body of water being measured. Finally, the device was applied to a series of studies on different bodies of water and a series of meaningful results were obtained.