The Working Principle of Smart Electricity Meters
1. Working principle of smart card prepaid power meter
The user holds the IC card to the power supply department to pay for electricity purchase, and the power supply department uses the electricity sales management machine to write the purchased electricity into the IC card. Then the meter will switch on to supply power. Remove the card after power is applied. When the remaining power in the meter is equal to the alarm power, the power off the alarm (or buzzer alarm) will be triggered. At this time, the user can restore the power supply by swiping the card in the induction area. When the balance power is zero, the power is automatically turned off, and the user must pay for the electricity with the card again, and then the electricity can be restored. The electronic smart meter is a high-tech product developed in recent years on the basis of the electronic meter. Its composition and working principle are very different from traditional inductive energy meters. Electronic smart meters are mainly composed of electronic components. Its working principle is to first process the sampled voltage and current signals through a real-time sampling of the user's power supply voltage and current and then use a dedicated electric energy meter integrated circuit and convert them into pulse output proportional to the electric energy. Finally, it is processed and controlled by the single-chip microcomputer, and the pulse is displayed as the power consumption and output.
2. Usually, we call the number of pulses sent by the A/D converter when the smart meter measures one kilowatt-hour of electricity as the pulse constant. For smart meters, this is an important constant. Because the number of pulses issued by the A/D converter in a unit of time will directly determine the accuracy of the meter's measurement. At present, most smart meters adopt the design principle of one A/D converter per household. However, there are also multi-user centralized smart meters produced by some manufacturers that use one A/D converter shared by multiple households, so the measurement of electric energy can only be performed by time-sharing queuing, which will inevitably lead to a decrease in measurement accuracy. This should be taken into account when designing and selecting models.
For more information about smart card prepaid electric meter, smart Wi-Fi electric meter, etc. Please feel free to contact us at gillian@linshu-tech.com.
