电子电路中常用到的一种称为“干簧管”的元件,是一种感知磁场的传感器,它结构很简单,仅仅是在玻璃管内封入2个软磁性材料制成的簧片即可。当干簧管置于磁场中,两簧片被磁化而接通时,就会起到开关的作用。一、教材中该实验的不足传感器的应用是高中物理(人教版)选修3-2第56页中的一个内容,由于配备的干簧管太小,导致演示效果及其工作原理根本看不清,这时,自制干簧 Commonly used in electronic circuits called “reed switch ” of the component, is a sensor of magnetic field perception, its structure is very simple, just enclosed in a glass tube 2 soft magnetic material made reed can. When the reed switch is placed in a magnetic field, the two reeds are magnetized and turned on, they act as switches. First, the lack of teaching materials The application of the sensor is a high school physics (PEP) Elective 3-2 page 56 of a content, due to the reed pipe is too small, leading to the demonstration effect and its working principle simply do not see Qing, at this time, homemade reed