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干簧管是舌簧管中的一种,其结构见图1。它的外壳是玻璃管,管内充以惰性气体,内装簧片是一种导磁性强、剩磁极小的软磁材料。若在干簧管附近放置一块永磁钢,簧片将被磁化,磁化后的极性如图2。当磁钢距干簧管较远时,两簧片之间的吸引力甚小,距离也基本不变。若磁钢逐渐向干簧管移动,簧片之间的
Reed switch is a reed tube, the structure shown in Figure 1. Its shell is a glass tube, the tube filled with inert gas, built-in reed is a strong magnetic permeability, minimal residual magnetic soft magnetic materials. If the reed pipe placed near a permanent magnet, reed will be magnetized, the polarity of the magnetization shown in Figure 2. When the magnet away from the reed pipe, the attraction between the two reed is very small, the distance is basically unchanged. If the magnet moves to the reed pipe gradually, between the reeds