基于FM报时信号的传感网时间同步的方法研究
[Abstract]:Time synchronization is a very key problem in wireless sensor networks. Traditional time synchronization methods such as GPS and NTP have been very mature, but high energy consumption, high complexity and harsh environmental requirements make them have some shortcomings in the application of wireless sensing networks. In order to make up for these shortcomings, based on FM time signal, a low power consumption and high precision time synchronization method for wireless sensor networks is proposed in this paper, and a time synchronization hardware system is designed to verify the effectiveness and feasibility of the method. The time synchronization system based on FM time signal is designed in this paper. the time synchronization system is awakened before the FM time signal arrives, receives the FM broadcast signal after awakening, and Demodulate it into FM audio signal. The FM time signal is screened from the FM audio signal by digital signal processing, and the time synchronization signal is output. The time synchronization system has the functions of autonomous wake-up and dormancy. It wakes up before the FM time signal and sleeps after the time synchronization ends. Through the test, the average accuracy of the time synchronization method designed in this paper can reach 1 millisecond, and the annual power consumption of time synchronization is 117 Ma. This method has been applied to the actual wireless sensor network system. In this paper, the FM time signal is extracted, the design difficulties are analyzed, and the time synchronization method is designed according to the existing difficulties, and verified by software simulation. Then the dormancy mechanism of FM timing signal is designed to solve the problem of system power consumption. Finally, the basic time module, signal processing and control module and time synchronization module of the time synchronization hardware system are designed, and the design scheme is introduced in detail. Especially on the basis of the first edition of the time synchronization module, a more stable digital time synchronization module is designed. Finally, the test platform of time synchronization system is built to test the effectiveness, time synchronization accuracy and power consumption of time synchronization system.
【学位授予单位】:浙江大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TP212.9;TN929.5
【参考文献】
相关期刊论文 前10条
1 冯琪;陈光;陈泽虎;;基于EFM32的温室监控系统的设计与研究[J];计算机与现代化;2014年09期
2 刘梦星;周乐川;陈杭;孙晓;许志;;基于EFM32的高精度动态心电记录仪的低功耗设计[J];中国医疗设备;2014年03期
3 李忠虎;王洋;;基于EFM32的智能型低功耗热量表设计[J];微型机与应用;2013年04期
4 师超;仇洪冰;陈东华;李晓艳;;一种简单的分布式无线传感器网络时间同步方案[J];西安电子科技大学学报;2013年01期
5 汪付强;曾鹏;张晓玲;梁炜;于海斌;;无线传感器网络时间同步综述[J];计算机工程;2011年22期
6 方振伟;王朝阳;孙开云;;中小企业数据中心实现NTP时间同步实例[J];微电脑世界;2011年10期
7 汪付强;曾鹏;于海斌;;一种低开销的双向时间同步算法[J];仪器仪表学报;2011年06期
8 方洁;陈伟;;基于DS3231的高精度时钟接口设计[J];电子设计工程;2010年02期
9 朱仲英;;传感网与物联网的进展与趋势[J];微型电脑应用;2010年01期
10 李倩;战兴群;王立端;翟传润;;GPS/INS组合导航系统时间同步系统设计[J];传感技术学报;2009年12期
相关博士学位论文 前2条
1 周黎鸣;无线传感网中节点位置和数据的隐私保护研究[D];北京邮电大学;2015年
2 杜晓玉;面向水环境监测的传感网覆盖算法研究[D];南京邮电大学;2015年
相关硕士学位论文 前7条
1 韩安波;无线传感网数据传输研究[D];北京邮电大学;2015年
2 邱明林;基于人体传感网的穿戴式远程健康监护系统的设计与实现[D];浙江大学;2013年
3 艾治雄;无线传感器网络低能耗时间同步算法研究[D];合肥工业大学;2011年
4 何春华;无线传感器网络时间同步技术研究[D];华南理工大学;2010年
5 朱冠男;无线传感器网络时间同步技术研究[D];武汉理工大学;2009年
6 陈敏;基于NTP协议的网络时间同步系统的研究与实现[D];华中科技大学;2005年
7 贺洪兵;基于GPS的高精度时间同步系统的研究设计[D];四川大学;2005年
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