摘要
地面核磁共振(SNMR)找水方法是目前唯一能直接找到地下水的地球物理新方法。由于该方法接收灵敏度高,因此对电磁噪声也很敏感。为了提高信噪比和新方法的找水效果,必须对接收到的信号进行去噪处理。本文使用了小波分析去噪提高核磁共振信号信噪比的方法,并通过对湖北省新洲工区和王家湾工区实测数据的小波处理和对比分析,证明了这种方法的有效性。
Nuclear magnetic resonance （NMR） technique is the only one geophysical new method of directly detecting underground water so far. Because the high sensitivity of this method, it is very sensitive to electromagnetic noise also. In order to improve the ratio of signal to noise （S/N ratio） and this new method＇s effect of detecting water, we should eliminate the noise contained in the received signal. This paper introduces a way to improve S/N ratio of the NMRS by wavelet analysis and analyzes the processed results from the cases in Xin Zhou and Wang jiawan investigation areas, finally, demonstrates the availability to use this method in practice.
出处
《CT理论与应用研究（中英文）》
2006年第2期1-5,共5页
Computerized Tomography Theory and Applications
关键词
核磁共振
小波分析
信噪比
去噪
Nuclear magnetic rcsonance（NMR）
wavelet analysis
S/N ratio
de-noise
