Wireless sensor network based micropower meter reading system and device

Abstract

The invention discloses a wireless sensor network based micropower meter reading system and device. Each micropower wireless transmitting-receiving module is connected with intelligent electricity meters via RS485 wires, collects, packs and encodes power utilization information in the intelligent electricity meters, and transmits the information to a meter reading concentrator via a short range communication network; and the meter reading concentrator packs and encodes different packed data, in different periods, received from at least two micropower wireless transmitting-receiving modules, and sends the packed and encoded data to a data center via a remote communication network within prescribed time. A wireless sensor network media access control protocol is fused with a network clock synchronization mechanism, and the work state of an RF communication module is changed to improve the energy efficiency of the whole system on the basis that coordinated work and wakeup period of nodesin the network are controlled accurately.

Description

Technical field: [0001] The invention relates to the field of wireless meter reading, in particular to a micro-power meter reading system and equipment based on a wireless sensor network. Background technique: [0002] The power communication network is an important part of the power grid and the basis for realizing the automation and modernization of power grid dispatching. Among them, wireless meter reading technology plays an important role. Wireless meter reading can be divided into Paid wireless meter reading system and free wireless meter reading system. The paid wireless meter reading system is a wireless data transmission service provided by suppliers such as China Mobile, China Unicom, and China Telecom. It is a wireless meter reading solution realized by using existing network facilities. Program. The system has reliable performance and high automation procedures, but if all the meter reading nodes adopt this type of communication technology, with the increase of ...

AI Technical Summary

Problems solved by technology

[0011] The wireless signal propagating in the wireless channel has broadcast characteristics. The data sent by the node to the destination node is usually received by the neighbor node, because the node can only judge whether it is the receiver of the data according to the address after receiving the complete frame data. For non-receivers, receiving redundant data causes waste of energy

In a wireless sensor network with a high node density, if the overhearing is not controlled, the energy of the nodes will be exhausted quickly

(4) Control information overhead

[0012] In order to ensure the normal operation of the protocol, some control information needs to be added to the head of the MAC frame structure. These control information do not carry any data information, but are only required by the protocol itself. The transmission of these control information also increases the additional energy consumption of nodes.

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