关键词: 果树冠层, 无线传感器网络, 微环境, 系统框架

Abstract:

Micro-environment of a tree canopy is a key factor influencing fruit quality and yield. WSN system can be used to achieve real-time and automatic monitoring. All nodes have the same equal status in traditional WSN system, while in a fruit tree canopy, it is redundancy that all nodes have sensing, managing and data transmission capability. The high-density nodes with the same equal status makes the WSN lack of reasonable architecture and levels, thus have low performance. To develop a WSN system for fruit tree canopy micro-environments monitoring, the traditional WSN was split, recombined, and a master-slave WSN system with segmentation of sensing ability was proposed. Each canopy was monitored by one sub-system which was composed of one master node and some slave nodes. The slave nodes were in charge of sensing information, and the master node took charge of managing the slave nodes and communicating with the other master nodes to transmit data. To evaluate the performance of the new system, the hardware and software were designed, and contrast experiments were performed. The results showed that the new system doubled the life cycle, and was more effective and energy saving. At present, it is suitable for micro-environment monitoring of fruit canopies.

Key words: fruit tree canopy, WSN, micro-environment, system framework