无缆遥测地震仪网络同步采样技术.pdfVIP

2009 仪 表 技 术 与 传 感 器 2009 3 Instrum ent Techn ique and Sensor No3 1, 2 1 2 2 杨泓渊 , 韩立国, 林 君 , 陈祖斌 ( 1. , 130026; 2. , 130026) : 当前大规模分布式测试网络均通过有线连接或 线通讯方式组网, 通过同步时钟协议或专用信号线实现时钟 同步, 文中提出了 通讯链路连接的大型分布式测试网络的同步采样问题, 并通过改进 RTC 的自锁时精度, 将 GPS 同步 定位技术和高精度 RTC自锁时相结合, 解决了 缆遥测地震仪网络的同步采样技术难题根据误差分析, 在双时标同时 应用时, 野外施工同步精度优于+ 32 s. 测试结果表明: 该方法达到了 缆遥测地震仪的同步采样要求, 通用性强, 可广 泛应用于同类测控网络 : 缆遥测地震仪; 调制器; 同步采样; GPS; RTC : TP206 : A : 1002- 1841( 2009) 03- 001 - 04 SynchronousAcquisition Technology inNetwork of LinelessTelemetric Seism ic Instrument 1, 2 1 2 2 YANG H ongyuan , HAN Liguo , LIN Jun , CH EN Zub in ( 1. ollege of GeoExploration Science and Technology, Jilin University, hangchun 130026, hina; 2. Key Laboratory ofG eoExploration Instrumentation, M inistry of Education, Jilin University, hangchun 130026, hina) Abstract:A t present, largescale test network are d istributed through cab le connections or w ireless communication network, the clock synchron ization is ach ieved through clock synchron izing protocol or special synchron ized clock signal lines. Th is paper presented the synchronous acqu isition problem in largescale distributed testing networkw ithou t communication links. The accuracy of selflock ing RTC was mi proved, comb ined w ith wh ich the smi u ltaneous GPS pos ition ing technology was used to solve the prob lem of synchronous sam pling in noncab le telem etry seism ograph network. According to the synchron ization error analysis, the syn chro