基于无线传感器网络的震波采集同步协议  

Synchronous collection protocol of seismic wave based on wireless sensor networks

作　　者：田传耕[1,2] 徐钊[1] 唐璐[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]徐州工程学院信电工程学院,江苏徐州221018

出　　处：《工矿自动化》2015年第10期23-27,共5页Journal Of Mine Automation

基　　金："十二五"国家科技支撑计划资助项目(2012BAH12B01);江苏省普通高校研究生科研创新计划资助项目(CXZZ11_0291)

摘　　要：针对基于无线传感器网络的煤矿井巷震波超前探测系统在采集震波时,采集节点之间的晶振频偏导致采样时间误差的问题,通过建模分析了采集节点之间的晶振频偏与最大采样次数之间的量化关系,并提出了一种无线传感器网络节点的连续同步协议。该协议通过汇聚节点向采集节点发送2次广播,采集节点利用广播时间间隔进行计数,实现高精度的时钟同步。实验结果表明,采用该协议后,在5kHz采样频率、持续3s的震波采集过程中,每次采样时采集节点之间的最大采样时间误差小于2μs。For the problem that oscillator frequency offset of collecting nodes of wireless sensor networks would cause sampling time error during seismic wave collection of advanced probing system of coal mine seismic wave,quantization relation between oscillator frequency offset of collecting nodes and the maximum sampling times was analyzed by modeling,and a continuous synchronization protocol of wireless sensor networks node was proposed.In the protocol,sink node sends broadcast twice to collecting nodes,and collecting nodes achieve time synchronization with high precision by counting interval of the broadcast.The experimental result shows that the protocol guarantees the maximum sampling time error between the nodes is less than 2μs during seismic wave collection with sampling frequency of 5kHz for 3s.

关 键 词：震波超前探测 震波采集 无线传感器网络 时间同步 

分 类 号：TD655[矿业工程—矿山机电]