Time division and frequency division multiplexing meter reading method and system

Abstract

The invention provides a time division and frequency division multiplexing meter reading method and system. The system comprises a concentrator carrier communication module and a plurality of multi-meter acquisition units which are connected with the concentrator carrier communication module through power lines, wherein each multi-meter acquisition unit comprises a power line carrier receiving-transmitting module and a micro-power wireless receiving-transmitting module; and the micro-power wireless receiving-transmitting modules are connected with the plurality of multi-meter acquisition units through micro-power wireless communication modules. The time division and frequency division multiplexing meter reading method and system provided by the invention are combined with power line carrier communication based on time division and micro-power wireless communication based on frequency division, rapid meter reading is realized, the meter reading success rate is improved, and the meter reading efficiency is high.

Description

technical field [0001] The invention relates to the technical field of meter reading, in particular to a time division frequency division multiplexing meter reading method and system. Background technique [0002] The metering meters such as water meters, electric meters, heat meters and gas meters in each household in the residential area have different installation locations and installation environments, which brings difficulties to the meter reading and statistical work of the management department. The centralized automatic meter reading system will be able to effectively solve these problems and bring convenience to meter reading. [0003] At present, the local communication methods of automatic meter reading mainly include a single communication method and a mixed communication method, and the single communication method mainly includes low-voltage power line carrier, micro-power wireless, and RS485 bus communication. The RS485 meter reading method is a bus-based met...

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Problems solved by technology

The RS485 meter reading method is a bus-based meter reading system. This technology is relatively mature at present, but RS485 uses a wired network to transmit data. The coverage distance increases and decreases, conflicts may occur when multiple nodes send data at the same time, there are many wiring fault points, and the security is poor

The advantages of low-voltage power line carrier communication are power line multiplexing, easy construction, and low overall cost, but water and gas meters cannot use power line carrier communication

The micro-power wireless communication circuit is independent and does not require wiring, but it is prone to mutual interference and is greatly affected by buildings and electromagnetic environments

The hybrid communication method is a communication method based on the combination of time-division power line carrier and micro-power wireless. However, the hybrid communication method in the prior art is based on issuing meter reading tasks and waiting for the meter reading results. When the meter reading results are not returned When other meters are not read, the efficiency of meter reading is low

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