Remote meter reading method and system, primary electric energy meter and secondary electric energy meter

Abstract

The invention discloses a remote meter reading method and system, a primary electric energy meter and a secondary electric energy meter. In the remote meter reading method, an acquisition terminal sends a meter reading command to each primary electric energy meter through a power line; each primary electric energy meter judges whether the electric energy meter address included in the meter reading command is the same as the primary meter address thereof; if the two addresses are different, the primary electric energy meter sends the meter reading command to each secondary electric energy meter connected therewith through an RS485 bus, and each secondary electric energy meter judges whether the electric energy meter address included in the meter reading command is the same as the secondary electric meter address thereof; and if so, the secondary electric energy meter sends the meter data obtained by the statistics thereof to the acquisition terminal through the primary electric energy meter via the RS485 bus. Since the acquisition terminal sends the meter reading command to each primary electric energy meter through the power line and each primary electric energy meter sends the meter reading command to multiple secondary electric energy meters connected therewith through the RS485 bus, the wiring complexity is simplified, the meter reading cost is reduced, and the meter reading speed is increased.

Description

technical field [0001] The invention relates to the communication field, in particular to a remote meter reading method and system, a main electric energy meter and an electric energy auxiliary meter. Background technique [0002] With the application of digital technology in electric energy meters, a General Packet Radio Service (General Packet Radio Service, GPRS for short) electric power remote meter reading system has been widely used. The GPRS power remote meter reading system utilizes the existing GPRS network or other mobile communication networks to transmit meter data, thereby realizing remote meter reading. However, the disadvantage of this solution is that the GPRS electric remote meter reading system relies on the mobile network of the mobile operator, so it needs to pay a high traffic fee to the mobile operator, resulting in high operating costs. At the same time, in remote areas, due to the poor infrastructure of mobile operators, the success rate of meter rea...

AI Technical Summary

Problems solved by technology

Since the current bandwidth of low-voltage power line communication is limited in the range of 3KHz to 500KHz, and the communication rate is less than 1Mbit / s, the meter reading speed is relatively slow

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