一、示零法所谓示零法就是一种常用的物理测量方法。天秤、电桥、电位差计等都是以示零法工作的常见测量装置。这类装置的基本结构如图1如示。示零法是利用力学或电学中的平衡原理,把待测量与标准量进行某种比较,从而定出待测量 First, showing the zero method The so-called zero method is a commonly used physical measurement method. Scales, bridges, potentiometers, etc. are all common measuring devices that work with the zero method. The basic structure of this type of device is shown in Figure 1. The zero method is to use the principle of balance in mechanics or electricity to compare the quantity to be measured with the standard quantity, so as to determine the quantity to be measured.