【摘要】 仪器的固有噪声水平是地震计的关键技术指标。如何降低仪器的自噪声是地震计设计中需要解决的重要问题。本文分析了产生地震计自噪声的两个主要噪声源:布朗热噪声和电子噪声(1/f噪声),以及它们对地震计传递函数的影响。分析了三种地震计所记录的地震台台基噪声,并且通过试验来检验仪器噪声对地震计观测数据的影响。更多还原

【Abstract】 Self-noise level is one of the most important parameters of seismometers.So,how to lower down the self-noise level is a big issue in the design of seismometers.This paper introduces how the two major noise sources-Brownian noise and electronic noise(1/f noise)affect seismometer′s self-noise level and transfer function.We analyzed base noise of seismic station recorded by three different kinds of seismometers and study how the self-noise affects the data recorded.更多还原