The electronic water meter consists of a base meter, a main control circuit and a water meter valve.
The sending base meter refers to the installation of the transmitting device in the ordinary mechanical water meter, which is used to provide the measuring signal for the electronic main control circuit of the water meter to realize the automatic measurement of water.
The main control circuit is used to control the switch of the water meter inlet valve in order to control the water consumption of consumers.
The switch of water meter valve is realized by CPU according to the condition of switch. The detection of low-voltage electricity is a very important problem for the single-chip computer system. To some extent, it can play a role in ensuring the reliable operation of the system and avoiding errors in data transmission.
The information display of electronic water meter can be accomplished by serial LCD module. The interface between serial LCD module and CPU is simple, and only three interface lines are occupied, which greatly saves resources.
Pulse signal should be treated as anti-jitter in software design.