井下多通道数据采集与处理系统的开发与实现

Development and Realization of Downhole Multi-channel Data Acquisition and Processing System

设计了一个以过抽样∑-△A/D转换器(24位)为采集部件、以DSP(TMS320C31)为核心CPU而又用CPLD器件代替部分复杂逻辑转换电路的多通道高精度的井下数据采集与处理系统。该系统除了能完成高质量的数据采集外,还具有较强的数据处理能力,为井间地震的研究与应用奠定了基础;另外还可广泛用于地球物理勘探、测井以及地下水资源的勘察。

A high precision downhole multi-channel data acquisition and processing system is des igned, in which an over-sampling ∑-△A/D transformer（24 digits） is taken as the acquisition component; DSP（TMS320C31） is taken as the core CPU, and some complex logical transfer circuits are replaced by CPLD device. This system can collect data with high quality, and possesses strong ability of data processing, which lays a foundation for the research and the application of earthquake, and can be widely applied to geophysical prospecting, well logging and exploration of ground water resource.