岩石的初动隐伏效应对波速测量的影响  

THE INFLUENCE OF PEDESTAL EFFECT ON WAVE VELOCITY MEASUREMENT

作　　者：施行觉[1] 卢振刚 李时灿 靳平[1] 李娟 徐果明[1] 

机构地区：[1]中国科学技术大学地球和空间科学系

出　　处：《地球物理学报》1995年第A01期310-315,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金

摘　　要：为了提高波速测量精度，关键是测准波的到时．对波形曲线的试验表明，随着测量装置放大倍数的增加，除了波的振幅增加之外，还观测到了波的到时前移现象，这就给波速测量带来了较大误差．在实测数据的基础上，就隐伏效应和量化误差的机理进行了分析，认为是隐伏效应和量化误差的共同作用，引起了波的到时的不稳定，而问题的实质是整个测量系统的阻尼衰减．最后就提高波速的测量精度提出了两点建议．To increase the measuring accuracy of wave velocity, the measurement of arriving time is the key point. Through the careful analyzing of the recorded waveforms, it is discovered that any change in the magnification of instruments will have a greater influence on the precision of the measurement of travel time than it is expected, as well as the influence on the recorded amplitude of waveforms. This phenomenon can be explained by the increasing of quantifying error due to the exist of Pedestal Effect. It is found tha the attenuation of the experimental system can give a good explanation of that effect, and two suggestions are proposed to increase the precision of the wave velocity measurement.

关 键 词：岩石 隐伏效应 波速测量 

分 类 号：P584[天文地球—岩石学]