Research And Application Of Wireless Automatic Meter Reading System For The Household Water Meter

With the mass urbanization development, the civil measuring instrument has been increasingly widely used, and there are many defects of the traditional manual metering mode. Automatic meter reading technology, which is emerging and advanced meter reading way, combined with the most advanced computer technology and communication technology, can reduce the equipment cost, save human resources, improve the reliability, accuracy and efficiency of meter reading, has been more and more widely used.This paper proposed a kind of automatic meter reading system based on short-range wireless self-organizing multi-hop network. The system is divided into three levels, respectively is wireless water meter, collector and concentrator. The system Device processor select ultra-low power microcontroller MSP430F1611, the wireless chip select low-power radio transceiver AT86RF212, and the wireless meter works in the way of periodic sleep/wake-up to reduce energy consumption. The concentrator is the central node of the network, and the collector works as a network routing node, it uses a multi-hop self-organizing way to achieve bidirectional communication between the wireless meter and concentrator. The system adopted star and network topology structure, established a wireless network communication model of automatic meter reading system, including the physical layer, MAC layer, network layer and application layer, and the MAC layer protocol adopted contention-based CSMA/CA. As the wireless channel is susceptible to interference, in order to improve the reliability of data transmission and the efficiency of the relay node, this paper adopts a MAC protocol based on collaboration. The system network layer routing protocol uses the dynamic source routing protocol DSR, after the deployment of the new node, it can quickly find and join the network, and establish multiple routes to the concentrator, and choose the best route to send data to the concentrator. In order to reduce redundant data in the network, this paper presents a way to avoid duplication of packets forwarded. The design of the overall structural, the design of network communication protocol and the design of the hardware and software were completed in this paper, and the system was tested to verify the feasibility of the meter reading system.Realized as a practical application of the system pre-schematic, the system was running well in small-scale, and completed the expected goals. This technique can effectively improve the enterprise management level, and has a certain degree of social and economic value.