一种洗衣机水位检测电路设计

A detection circuit design for washing machine water level

作为洗衣机的核心部件水位传感器,水位检测的精度直接影响洗净度、水流强度、洗涤时间等参数。对于模糊控制的全自动洗衣机,常采用谐振式水位传感器,其输出的是频率可变的正弦信号,需要设计特定水位传感器检测电路将水位传感器输出的正弦信号转换为单片机可用的方波信号。

As the core component of the water level sensor for the washing machine,water level detection accuracy directly affects the degree wash,the flow intensity,the washing time and other parameters.Most of the automatic and fuzzy control washing machine using resonant water level sensor,its output is a sinusoidal signal of variable frequency,the need to design specific the water level sensor detecting circuit water level sensor outputs a sinusoidal signal is converted to a microcontroller for availability square wave signal.