摘要
WSN节点采用低成本的晶振,节点之间的频率差异不可避免。该项目讨论频率对耦合振荡器的影响,设计一个适合于WSN时间同步的频率互异耦合振荡器模型。该模型验证振荡器系统在所有条件下都可以达到同步,分析振荡器系统的理论模型,给出系统达到同步的条件。通过多次实验,分析参数对同步的不同影响,验证该模型的可行性。该模型解决振荡器模型因频率不同而出现误差增大的问题,提升整个系统的精度。该模型在经典耦合振荡器基础上,加入频率互异和多跳网络拓扑两个因素,使其更加适用于无线传感器网络。
The WAN＇s nodes adopt low cost crystal oscillator, so the frequency difference between nodes is inevitable. Discusses the frequency influ- ence to coupled oscillator, and designs a frequency different coupled oscillator model which is suitable for time synchronization. Themodel validates that the oscillator system can realize the synchronization under any conditions and analyze the theory model of oscillator and give the condition of synchronization. By simulation experiment, analyzes the influence of parameters＇ to synchronization and validates the model feasibility. The model solves the problem that the error will be lager because of the different frequency of classic oscillator model, and improves the system＇s precision. The model adds two factors of frequency different and multi hop network topology based on classic coupled oscillator and makes it more suitable for WSNs.
出处
《现代计算机》
2016年第7期3-5,24,共4页
Modern Computer
基金
浙江省教育厅科研课题(No.Y201432666)
