交叉偶极阵列声波测井仪信号处理电路抗干扰设计.pdfVIP

交叉偶极阵列声波测井仪信号处理电路的抗干扰设计 ∀ 27∀ 交叉偶极阵列声波测井仪信号处理 电路的抗干扰设计 1 1 1 2 , , , ( 1. , 611731; 2. , 101149) :针对交叉偶极阵列声波测井仪高温强背景噪声的作业环境,通过深入分析噪声源,采取信号滤波 和优化的布局布线等技术手段设计交叉偶极声波信号处理电路着重阐述了恶劣环境下前置预放大电 路高精度带通滤波器和逻辑控制等功能模块的抗干扰设计试验结果表明, 该处理电路能在井下恶劣 环境中稳定可靠工作,有较强的噪声抑制能力, 完全满足工业生产作业的需要 :交叉偶极阵列声波测井;噪声源; 滤波;抗干扰设计 : P618. 1; P631. 814 : A : 1000- 8829( 2010)04- 0027- 04 An tiIn terferen ce D esign of Signal P rocessing C ircu it for CrossD ipole A rray A cousticW ell Logging 1 1 1 2 QIAN Xiao ing, SHIY ibing, ZHANGW ei, LIU X ien ( 1. School ofAuto ation Engineering, University ofElectronic Science and Technology ofChina, Chengdu 611731, China; 2. TechnicalCenter of China Oilfield ServicesCo. Ltd, Beijing 101149, China) Abs tract: Crossdipole array acousticwell logging tool ust be on operation in high te perature and strong noise background, so its signal processing circuit is designed w ith so e technical easures based on noise sources analysis in depth, such as analog filter and opti al layout. The antiinterference designs of prea pli fier circuit, highprecision bandpass filter and control logic circuit are presented in details. The experi ental results show that the signalprocessing circuitwhich has the characteristic of antinoisesinterference can oper ate stably and reliably in the downhole terrible environ ent and satisfy the need of industrial production. K ey w ord s: crossdipole array acousticwell logging; noise sources; filtering; antiinterference design , ,, : [ 1] ; ; ,