Design And Implementation Of The Field WSN Monitoring System For Node Management And Transparent Transmission

Frozen soil is an extremely sensitive to temperature and unstable nature of the soil, permafrost areas of railways, highways disease is very serious, in order to obtain information related to the characteristics of Frozen soil, all need to be monitored in real-time detection.In this paper, Frozen soil temperature and humidity monitoring remote collection project background, the project uses a distributed measurement and control system based on ZigBee WSN technology,Using sensors, ZigBee, Bluetooth serial, Android gateway modules, as well as low-power technology node and task scheduling technology, Bluetooth serial port technology and so on,connection construction of distributed wireless sensor networks and the Internet, remote monitoring and control to realize wireless data transmission on the regional situation and goals. This paper mainly introduces the data from the sensor nodes to process the coordinator node transparent transmission,Most of the existing transparent transmission equipment is based on point-to-point transmission, and can not be established in the transmission of multi points.This paper studied the system can achieve according to our need to establish transparent transmission by the center to any front-end node, which can have multiple data acquisition devices to join.Now the transparent transmission mode without link layer error correction function, may appear a part of the transmission frame is lost,the method of this paper can be studied in the underlying ZigBee transparent transmission frame do specialized response, so as to avoid loss of data packets.Each node is a ZigBee module with low power CC2530 as the main control chip,the communication between nodes is mainly used TI company’s semi open source protocol stack of Z-Stack as the main transmission communication protocol, this protocol is based on ZigBee network communication protocol IEEE 802.15.4.In addition, in order to sleep and wake up ways to achieve low power consumption of the terminal nodes, the network topology to do system node management.According to the test result, transparent transmission system designed in this paper can be a data acquisition instrument collected data transparent transmission to the PC machine, and the accuracy is very high.