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电压报警器设计方法谁知道？

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电压报警器设计方法谁知道？

浏览：65次 | 提问时间： 06-26 09:04

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3个答案

隔空 06-26 09:04

必须用到采样电路。降压的电源变压器次级整流稳压后设阀值晶体管(开关管)，初级高于250伏，次级电压相应增高而导通，继电器吸合控制相应的震荡电路(电铃电路)，发出高音；当低于190伏时，另一只开关管释放，继电器常闭触点接通另一路震荡电路，发出低音(或间歇式响声)

等孤人 06-26 09:13

这类电路太简单了。用一个最便宜的集成运放，负输入端接基准电压，正输入端接取样电路，输出端可接发光二极管、继电器等。简单说就是这样。最好能加入一些抗干扰的措施。建议采用滞回比较器电路，抗干扰性强。

等孤人 06-26 09:21

有一个发光器(有叫投光器),另外一个叫受光器,发光器接一个DC12V的电就行了,标识,受光器上面也要接一个DC12V,另外,有三个是信号接线柱,上面有图标,请根据你主机防区的报警方式接上面的常闭或者常开的接线柱.

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