基于FPGA的感应测井数据采集电路设计  

Data acquisition system design of induction logging based on FPGA

作　　者：李婷兰[1] 叶欣[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,西安710065

出　　处：《电子测试》2013年第1期63-65,共3页Electronic Test

基　　金：国家自然科学基金资助项目(50974103)

摘　　要：针对石油测井采集信号的特点及井下高温、高压的恶劣环境,设计了一种基于FPGA的数据采集电路。具有7个数据采集通道,即双感应的中、深感应信号A、B道数据,4个聚焦信号0、1、2、3道数据以及辅助道数据;此电路以现场可编程门阵列FPGA作为核心处理器,实现系统的逻辑控制以及数据转换。其中电路硬件采用AD974实现数据的采集,最高采样率200KSPS,16位分辨率;软件部分主要是用VHDL语言及原理图实现FPGA的硬件描述。经过验证,此数据采集电路满足设计要求,具有高性能,工作稳定的特点。Because of characteristics of the acquisition signal and downwhole hig- temperature and high-pressure circumstance,a data acquisition circuit based on FPGA is designed. This data acquisition circuit has 7 main channels, which are dual-induction signals A and B,4 focused signals 0,1,2,3 and auxiliary signal. Taking field programmab gate array FPGA as the core processor,it realizes logical control as well as data transformation of the system. AD974 is used in this circuit to realize data acquisition. It has 200KSPS sampling rate and 16 bit resolution. The part of software uses VHDL and schematic to describe the FPGA internal circuit. After test,it is proved that this data acquisition circuit has high performance and works stably. It achieves the design requirements.

关 键 词：数据采集 FPGA 感应测井 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]