DDS在低场核磁共振岩心分析仪中的应用  

Application of DDS in low field nuclear magnetic resonance core analyzer

作　　者：车文华[1] 张一鸣[1] 曹志峰[1] 周莹[1] 

机构地区：[1]中国科学院电工研究所

出　　处：《石油仪器》2001年第5期24-26,60,共3页Petroleum Instruments

基　　金：国家自然科学基金(项目号:59977023); 所长基金资助项目

摘　　要：直接数字合成（ＤＤＳ）是近年来迅速发展起来的一　种新型信号合成技术。由于采用了全数字结构，它具有频率和相位分辨率高、频率转换速度　快、相位噪声小以及易于集成等诸多优点。文章首先介绍了ＤＤＳ的原理，然后就其在低场核　磁共振岩心分析仪中的应用进行了详细的讨论，对应用效果进行了总结。测试表明，将ＤＤＳ　用于低场核磁共振岩心分析仪是很成功的。Direct digital synthesis (DDS) is a new signal synthesis technipue developed very fast in recent years. Because of its digital structure, it has many advantages, such as high frepuency and phase resolution , high speed of frequency changing, low phase noise and easy for integration. In this article, the principle of DDS is reviewed at first, then its new application in low field nuclear magnetic resonance core analyzer is discussed in detail. The advantages of the application are summarized. Test shows that the application of DDS in low field nuclear magnetic resonance core analyzer is successful.

关 键 词：直接数字合成 低场核磁共振 岩心分析仪 信号合成 

分 类 号：P631.83[天文地球—地质矿产勘探]