基于GPS的无线传感器网络时间同步技术  

Wireless sensor networks time synchronization based on GPS

作　　者：张九宾[1] 张丕状[1] 杜坤坤[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051

出　　处：《传感器与微系统》2009年第6期31-33,共3页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(60532080;60372073)

摘　　要：在无线传感器网络测试系统中,为了对测试对象进行准确的测试,时间同步技术至关重要。根据GPS授时原理,提出了利用GPS秒脉冲对同步控制系统进行触发,并无线广播同步触发信号,同时,各传感器节点通过接收同步触发信号,进行时钟同步触发、时钟校准,以及对测试事件触发的同步采集。通过验证,各传感器节点之间的事件同步触发误差为1μs左右,并具有很高的可靠性,可广泛应用于航空、航海等工程测试领域。In the wireless sensor networks test system, in order to test the accuracy of the test subjects,the time synchronization is very essential. According to the GPS timing principle, GPS seconds pulse is used to trigger control system and broadcasting signal of synchronization trigger. At the same time the sensor nodes receive the signal to make clock synchronization trigger, clock calibration and test events to trigger by the synchronization acquisition. Through the test verification, the event trigger synchronization error between the sensor nodes is about 1 μs, and is has high reliability, and can be widely used in aviation navigation and so on.

关 键 词：无线传感器网络测试系统 时间同步技术 GPS秒脉冲 无线广播 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]