鹰嘴桃园土壤湿度检测的无线传感器网络节点设计

Design of WSN Nodes and Network Performance Analysis Applied in a Yingzui Peach Plantation

为了采集鹰嘴桃园的土壤湿度,设计并在鹰嘴桃园环境中部署基于CC2430无线收发模块的传感器节点。以能量异构的路由协议为基础,仿真并验证了协议中高级节点比例变化时,网络稳定性的变化,解决了网络稳定周期短、节点能耗不均衡等问题。在鹰嘴桃园中分别进行网络规模、节点部署类型等因素对网络性能影响的试验,鹰嘴桃园试验以土壤湿度为监测对象,通过无线传感器网络传输数据。试验表明,在5、10、15和20个节点的网络规模下,网络的延迟和阻塞随着网络规模的增加而增大,拓扑结构的稳定时间也随之延长,在数据传输时间间隔分别为10、20、30和40s时,丢包率也随传输间隔的增加而降低,同等条件下,菱形部署的丢包率低于随机部署的丢包率。

This paper designed and deployed wireless sensor nodes based on CC2430 transceiver modules in Yingzui peach plantation. Based on the heterogeneous-energy routing protocol, this study simulated and validated the changes of protocol proportion of senior node with the changes of network stability, solved the problems such as the network＇s short period stability and the node energy imbalance. The experiments for the influences of net scale and node deploying type on the net performance were conducted in the Yingzui peach plantation. It took the soil moisture as monitoring object and transmits the data through wireless sensor network. The result showed that under the condition of network scale varying from 5, 10, 15 to 20 nodes, both time delay and congestion of the network increased, the topology stabilization time got prolonged simultaneously, Packet Loss Rate （PLR） decreased when the data transmission interval varied from 10, 20, 30 to 40 s. Under the same condition, PLR values in diamond deployment were lower than those in random case.