摘要
采集电路在数字声波测井中起着非常关键的作用,采集信号的可靠性,稳定性以及精度直接决定着仪器的质量,本文介绍了高精度模数转换芯片AD7671的工作原理以及常用工作方式设置,并在此基础上阐述了基于AD7671和DSP,FPGA进行声波信号高精度高速率采集的实现方法,同时给出了常见硬件电路的电路图.通过多次下井试验,表明该电路工作稳定可靠,取得了良好效果。
The acquisition circuit plays a crucial role in digital acoustic logging.Reliability,stability and accuracy of the signal acquisition determine the quality of the tool directly.This article describes the principle of a high-precision analogdigital chip AD 7671 and working mode setting.It formulates the implementation method of acoustic signal acquisition based on AD 7671and DSP.It also gives out the circuit diagrams of common hardware circuit.Many times of downhole tests show that the circuit works steady and reliable.It has gained good results.
出处
《石油工业计算机应用》
2012年第4期29-31,3-4,共3页
Computer Applications Of Petroleum
基金
大型油气田及煤层气开发科技重大专项项目(2011ZX05020-005)
