基于锁相环的水听器阵列多传感器高精度同步技术
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摘要
针对水听器阵列中多个传感器采集信号的同步问题,提出了一种适合于水听器阵列结构特点的高精度同步方法。该方法采用两级同步的方式:首先运用锁相环技术,保证同一个节点内多个传感器之间的同步采集;然后采用传输延时补偿的方法来补偿不同节点间的传输延时所引起的同步误差,实现节点之间的高精度同步采集。建立了一个实验系统:它由一个主节点和两个从节点组成。测试结果表明,同一节点内的同步采集误差不大于5 ns,不同节点间的同步采集误差不大于10 ns。对样机系统进行了进一步测试,测试结果与实验系统的测试结果一致。测试结果表明,该方法能实现水听器阵列多传感器间的高精度同步采集。
This paper proposed a high-precision synchronous method,which was suitable for the structural characteristics of the hydrophone array and used to handle the acquisition synchronization problems among multiple sensors in the hydrophone array.The method used two-stage synchronization techniques.First,in order to achieve synchronous acquisition among multiple sensors within the same node,it used the phase-locked loop technology.Then,it adopted a transmission delay compensation method which could compensate the synchronous error to attain high-precision synchronous acquisition between the different nodes.It set up an experimental system which consists of one master node and two slave nodes.The test results show that the synchronous acquisition error within the same node is no more than 5 ns and the synchronous acquisition error between the different nodes is no more than 10 ns.Then,the prototype system is further test,and the test results are consistent with the test results from the experimental system.Therefore,the proposed method can achieve high-precision synchronous acquisition among multiple sensors in hydrophone array.
This paper proposed a high-precision synchronous method,which was suitable for the structural characteristics of the hydrophone array and used to handle the acquisition synchronization problems among multiple sensors in the hydrophone array.The method used two-stage synchronization techniques.First,in order to achieve synchronous acquisition among multiple sensors within the same node,it used the phase-locked loop technology.Then,it adopted a transmission delay compensation method which could compensate the synchronous error to attain high-precision synchronous acquisition between the different nodes.It set up an experimental system which consists of one master node and two slave nodes.The test results show that the synchronous acquisition error within the same node is no more than 5 ns and the synchronous acquisition error between the different nodes is no more than 10 ns.Then,the prototype system is further test,and the test results are consistent with the test results from the experimental system.Therefore,the proposed method can achieve high-precision synchronous acquisition among multiple sensors in hydrophone array.
引文
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[2]游寒旭,陈咏恩.CMMB系统中的符号与时钟同步方案[J].计算机工程,2012,38(4):278-280.
[3]徐世武,王平,黄晞,等.无线传感器网络中时间同步技术的综述[J].微计算机应用,2011,32(5):32-38.
[4]陈世强,周旭,王俊峰,等.基于网络驱动接口规范的网络时延测量位置误差消除方法[J].计算机应用,2012,32(7):1787-1790,1795.
[5]李本亮,王厚军,师奕兵,等.基于PTP的无线分布式测试系统时钟同步研究[J].电子科技大学学报,2010,39(4):556-559.
[6]陶志勇,胡明.无线传感器网络中基于层次结构的时间同步算法[J].计算机应用,2012,32(6):1513-1515.
[7]漆璐,陈旿.Ad hoc网络时钟同步研究[J].计算机应用研究,2011,28(12):4702-4704.
[8]吴康,段发阶,陈劲,等.海上地震探测传输系统的设计[J].电子技术应用,2010,36(9):100-107.
[9]HAROLD L L.Time synchronization for seismic exploration:US pa-tent,5978313[P].1999.
[10]马龙华,陈孝良,程晓斌,等.分布式声学测量设备中精确时钟同步研究[J].计算机工程与设计,2011,32(1):351-353,365.
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[12]吴康.声纳拖曳阵缆采集传输技术研究[D].天津:天津大学,2010.
[13]BEST R E.锁相环设计、仿真与应用[M].5版.李永明,译.北京:清华大学出版社,2007.
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