What is the basic structural principle？

The appearance of IC card water meter is basically similar to that of general water meter, and its installation process is also basically the same. The use of IC card water meter is very simple. From the user's perspective, it is to insert the IC card into the water meter. The working process of an IC card water meter is generally as follows: insert the IC card containing the amount into the IC card reader/writer in the water meter. After the microcomputer module recognizes and downloads the amount, the valve opens and the user can use water normally. When the user uses water, the water collection device begins to collect the water consumption and convert it into the required electronic signal for the microcomputer module to measure, and display it on the LCD display module. When the user's water usage amount drops to a certain value, the microcomputer module will sound an alarm, prompting the user to use their card to pay for water. If the water usage amount is exceeded, the microcomputer module will automatically close the electric control valve and cut off the water supply. Until the user inserts the paid IC card and restarts opening the valve for water supply.