地震数据采集中的数据汇聚系统设计  

Data Gathering System Design for Seismic Data Acquisition

作　　者：程宏才[1,2] 杨俊峰[1,2] 宋克柱[1,2] 王东旅[1,2] 

机构地区：[1]中国科学院核探测技术与核电子学重点实验室,合肥230026 [2]中国科学技术大学近代物理系物理电子学安徽省重点实验室,合肥230026

出　　处：《数据采集与处理》2012年第4期514-520,共7页Journal of Data Acquisition and Processing

基　　金：国家高技术研究发展计划("八六三")计划(2006AA09A102-02)资助项目

摘　　要：提出了一种地震数据采集系统中的高速数据汇聚系统设计。系统以CPCI机箱为框架,利用机箱插卡可插拔性和背板高速PCI总线来实现灵活改变系统的通道数量和数据的快速汇聚,通过DMA传输来简化CPU工作并提高数据汇聚速度,通过大容量缓存消除数据汇聚死时间且提高数据传输效率。最终实现的系统可以满足4缆共7 680道数据采集系统的数据汇聚要求。本系统结构简洁灵活,数据汇聚速度高,实时性好,能够应用于其他相关大型数据采集系统中。A high speed data gathering system is designed for the seismic data acquisition system. （CPCI） crate is adopted as the framework of the data gathering system. The number of the sample channels can be easily changed by plugging in or out the cards of CPCI crate. Data can be gathered with high speed through the PCI bus of the CPCI crate. The use of （DMA） transferring simplifies the system control and improves the data gathering speed from multicards. Large cache is used to eliminate the dead time of data gathering and increase the efficiency of DMA transaction. The experiment shows that the system can satisfy the requirements for data gathering of a system four-cable system with totally 7 680 channels. The system features simple structure, high speed of data transferring, high performance of real-time data gathering. Moreover, it can be easily applied to other large-scale data acquisition systems.

关 键 词：数据汇聚 CPCI机箱DMA传输 现场可编程门阵列 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]