earticle

영어

Wireless sensor networks are the main technical means to realize variables information network monitoring in agricultural environment. In order to solve the problem of low-cost, low-power field information, reliable real-time transmission, a farmland information online monitoring based on wireless sensor network has been designed. The overall structure of the system contains sensing layer, transport layer and application layer, which uses the ZigBee wireless communication technology to build wireless sensor networks. Monitoring data of different farmland regions are transmitted through the GPRS network to the monitoring center securely and reliably. The use of data monitoring center is aimed at collecting data for processing. TI's ultra-low-power micro-controller MSP430F149 and ZIGBEE module CC2530F256 work as the core hardware in the designing of wireless sensor network node. With Z-Stack as the protocol stack, software is designed based on the nodes to achieve a gateway node and terminal node functions. The results gained from a set of network communication system tests, inter-node transmission quality tests and remote transmission tests show that: based on wireless sensor network, the online monitoring system of field information can automatically complete the data acquisition and transmission and with the aid of GPRS / Internet network, the data can be sent to the data server with high stability, high reliability, punctuality, meeting the basic requirements of on-line monitoring of farmland information.