在贴井壁侧向仪器中关于微弱信号精确采集电路的设计方法  

Precise Acquisition of Weak Signals in Contacting Sidewall Laterolog

作　　者：梁晓成[1] 张海[1] 苑娜[1] 

机构地区：[1]大庆钻探工程公司测井公司

出　　处：《石油工业计算机应用》2013年第3期42-44,4,共3页Computer Applications Of Petroleum

摘　　要：针对贴井壁侧向仪器在检测中微弱信号难于精确采集的特点,提出了一种用于微弱信号的精确采集方法。通过优化电极连线,选择合适的工作频率和工作模式,做好信号屏蔽,主电流检测使用变压器隔离和放大,实现了贴井壁侧向仪器在检测中微弱信号的精确采集。实验效果表明:应用该电路对微弱信号的采集提高了一个数量级左右,满足了仪器的设计需求。A method is proposed according to the difficulty that weak signals are hard to acquire by contacting sidewall laterolog tool.By optimizing the electrode connection,selecting the appropriate operating frequency and mode,good signal shielding,transformer isolation and amplification is used in main current detection to achieve accurate detection of weak signals.Experimental results showed that the application of the weak signal acquisition circuit improves an order of magnitude and can meet the design requirements of the instrument.

关 键 词：微弱信号 精确采集 贴井壁侧向 

分 类 号：TN911.23[电子电信—通信与信息系统]