传感器是把将所感受到的非电学物理量(如位移、速度、压力、温度、流量、光强、声照度等)转换成便于测量、传输、处理的电学量(如电压、电流、电容等)的一种组件,将感受到各种微弱的信号放大、传输、存储、显示或做出必要的控制输出,起自动控制作用.通过传感器进行物理实验,可以改进原来不好做或做不好的实验,做出原本做不出的实验,将 The sensor is to convert the perceived non-electrical physical quantities (such as displacement, velocity, pressure, temperature, flow, light intensity, sound intensity, etc.) into electrical quantities (such as voltage, current, capacitance, etc.) for measurement, transmission and processing A component that senses a variety of weak signals to amplify, transmit, store, display or make the necessary control outputs that function as an automatic control. Physical experiments with sensors can improve experiments that were otherwise poorly done or badly done , To make the original experiment can not be done