有些农村小电站,由于前池水位失控,往往导致水位上涨,溢出后淹没庄稼,毁坏农田,造成不良后果。为了防止事故的发生,有必要对水电站前池水位加以预警控制。现介绍一种简易水位自动报警装置,原理参看线路图。当水位上涨到 A 点时,电路导通,经过 Z 整流,继电器 J 工作,电笛 DD 发出呜叫声。变压器 B 的输出电压一般小于36伏,继电器 J 可选用24伏直流继电器,调节水中静触点的距离可改变直流电压的大小。 In some rural small-scale power stations, the uncontrolled water level in the former pool often leads to rising water levels, flooding crops and destroying farmland after the overflow, resulting in adverse consequences. In order to prevent accidents, it is necessary to pre-warning the water level in the front of the hydropower station. Now introduce a simple automatic water level alarm device, the principle see the circuit diagram. When the water level rose to A point, the circuit is turned on, after rectification Z, relay J work, whistle DD whistle sound. Transformer B’s output voltage is generally less than 36 volts, relays J optional 24-volt DC relay, adjust the distance of static contact in the water can change the size of the DC voltage.