可重配置采样率的数据采集系统设计  

Data Acquisition System with Reconfigurable Sampling Rate

作　　者：张燕[1] 黄伟 叶朝辉[1] 肖冰[3] 刘西恩[3] 

机构地区：[1]清华大学自动化系,北京100084 [2]北京睿清智华信息技术有限公司,北京100084 [3]中海油田服务股份有限公司,北京100084

出　　处：《计算机测量与控制》2013年第11期3142-3144,共3页Computer Measurement &Control

摘　　要：石油探测系统对数据采集的频率、模式等需求灵活多变;利用FPGA技术适应并行高速工作的特点,设计了"前端处理+FPGA+DSP"方案,完成大数据量的采集;在此基础上,详细讨论了高精度数模转换芯片ADS1278的两种数据传输协议,重点设计和验证了可实时配置采样率的两种方案;给出了关键模块的仿真结果和最终性能指标;通过实际验证,采用该技术的电路系统能够实时接收和处理8种采样频率的采集协议,采样数据有效位数均超过16位;两种方案均可在125℃高温环境下稳定运行并取得可靠的数据结果;为工业探测系统的可重配置研究提供了参考价值。Oil detection system has brought up demands for changeable frequencies, alterable modes during data acquisition. Taking ad- vantage of FPGA technology in high--speed work in parallel, the framework of ＂Preprocessing ＋ FPGA ＋ DSP＂ is presented to complete the acquisition of a large amount of data. Furthermore, it discusses two data transfer protocols. The work focuses on the design of two schemes of real--time configuration of the sampling rate. Finally, simulation results and key performance indicators of core module are pres- ented. Field experiment attests that the circuit using the design above can deal with various acquisition agreements including 8 kinds sampling rate, more than 16 effective bits. Both schemes can run stably at hiRh temperatures.

关 键 词：FPGA 信号处理 可重配置 采样率 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]