What is the difference between a smart water meter and a mechanical water meter?
The internal structure of ordinary water meters can be divided into three parts: shell, sleeve and inner core from the outside to the inside. The shell is cast iron, and after the water comes out of the water inlet, it passes through the lower annular space of the shell, which is called the "lower annular chamber" here. Above this annular space, there is an "upper ring chamber" that communicates with the water outlet. There is a filter screen with small holes at the bottom of the sleeve to filter out the sundries in the water. There are upper and lower rows of round holes on the side of the sleeve. The positions of the holes are just opposite to the upper and lower ring chambers of the shell. Obviously, the lower row is the water inlet hole, and the upper row is the water outlet hole. It is particularly noteworthy that these two rows of holes are punched obliquely along the tangential direction of the circle. Note that the upper and lower rows of holes are in opposite directions. Water flows in from the lower drain hole along the tangential direction, which is bound to form a rotating water flow, which is very important for the work of the water meter. The inner core is divided into upper, middle and lower layers. The upper layer can be seen from the glass window, with only the pointer and dial. In fact, the most important thing is the lower layer, where there is a plastic wheel, and there are many plastic blades on the edge of the wheel, which are called "impellers".
The position of the impeller is just in the rotating flow formed by the lower hole of the casing, and the water flow impacts the blades around the wheel, generating torque and making the impeller rotate. The wider the faucet is turned on, the faster the water flow, and the faster the impeller turns. The shaft of the impeller reaches the middle layer vertically, and there is a pinion on the shaft, which is used to mesh with the "decimal number gear" to achieve the purpose of accumulating the number of revolutions. The function of the "decimal number gear" is that every time the one-digit gear turns ten times, the ten-digit gear rotates once. In other words, for one revolution of the one-digit gear, one tenth of one revolution of the ten-digit gear. The single-digit gear is the active agent, and it is used to drive the ten-digit gear. In fact, each stage of the decade is done with two pairs of gears to make the direction of rotation consistent, one pair of gear ratio is 9:30, the other pair is 10:30, these two pairs are connected in series, the total gear ratio is this The product of the two, which is 0.099999, can be approximated by exactly 0.1. In this way, if you want to read seven digits (four before the decimal point is a black scale, and three after the decimal point is a red scale), you have to use 12 pairs of gears. Coupled with other uses, 18 shafts and 34 gears have to be squeezed into this small space in the middle layer, which can also be regarded as a high-density installation. Because of its simplicity and low price, this type of water meter can be used for a long time in a humid environment without maintenance, and it does not need a power supply, and the power failure does not affect the work. It will still serve for a long time.
Smart water meter is a new type of water meter that uses modern microelectronic technology, modern sensing technology and smart IC card technology to measure water consumption, transmit water data and settle transactions. Compared with ordinary water meters, which generally only have the functions of flow collection and mechanical pointer to display water consumption, it is a great improvement. In addition to recording and electronically displaying the water consumption, the smart smart water meter can also automatically control the water consumption according to the agreement, and automatically complete the calculation of the water fee for the stepped water price, and at the same time, it can store the water consumption data. Since its data transmission and transaction settlement are carried out through IC cards, it is possible to realize the transition from the staff's door-to-door operation of the meter to the user's own payment at the business office. The IC card transaction system also has the characteristics of convenient transaction, accurate calculation and settlement by bank. The appearance of a smart water meter is basically similar to that of a general water meter, and the installation process is basically the same. The use of the smart water meter is very simple. From the user's point of view, just insert the IC card into the water meter. The working process of the smart 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 starts to collect the water consumption, converts it into a required electronic signal and supplies it to the microcomputer module for measurement, and displays it on the LCD display module. When the user's water consumption drops to a certain value, the microcomputer module will sound an alarm, prompting the user to pay for water with a card. If the amount of water consumption is exceeded, the microcomputer module will automatically close the electronic control valve to cut off the water supply. Until the user inserts the IC card that has been paid and starts to open the valve for water supply.