The Construction Principle of Smart Gas Meter
The construction principle of the smart gas meter mainly includes the following key components and working principles:
Base meter part：
The base meter part is mainly a traditional mechanical meter and does not have remote control function.
Diaphragm box and gas measurement chamber:
The diaphragm box consists of two identical gas measuring chambers on the left and right. Each gas measuring chamber is divided into two identical small measuring chambers by a soft diaphragm.
When the distributed gas enters the four small measuring chambers in turn, it pushes the diaphragm to swing freely.
Valve seat and valve cover:
The movement of the diaphragm assembly drives the connecting rod mechanism (double crank rocker mechanism) through the rocker and causes the valve cover to rotate, thereby controlling the inflation and exhaust of each metering chamber in sequence.
Counter and unidirectional counter:
The eccentric rotating gear of the connecting rod mechanism drives the mechanical one-way counter to count through the transmission of the gear, and finally the exhaust volume of the gas meter is displayed through the counter.
Electronic metering and prepayment functions:
A method of adding electronic measurement on a mechanical basis. Usually, a magnet is installed on the mechanical roller, and two reed switches are installed above and below the roller.
When the magnet does not reach the reed switch position, the reed switch is disconnected; when the magnet moves to one of the reed switch positions, the reed switch is energized, and the circuit outputs circuit waveforms s0 and s1.
The single chip computer judges these two sets of waveforms to obtain the working status of the gas meter.
Remote control and billing system:
Smart gas meters support remote control, and users can remotely check the status of gas meters and pay bills through smart devices.
Gas charges are calculated on a cubic meter basis. The volume of gas discharged each time the membrane in the bellows of a smart gas meter moves is determined by the area of the membrane and the stroke of the movement.
In summary, smart gas meters achieve efficient and convenient gas metering and management by combining the precise measurement of mechanical meters with the remote control capabilities of electronic systems.
