消除强震加速度记录数字化误差的方法和处理软件

Elimination method and analysis software of digitization errors from the processing of digitizing strong motion accelerograms

本文详细地分析了用数字化仪和激光扫描仪对模拟加速度记录进行数字化时所产生的误差及消除这些误差的方法,并开发了相关处理软件。数字化误差由数字化设备的系统误差和读数员在操作过程中的随机误差迭加而成,随机数字化误差是具有各态历经性质的、其振幅按高斯规律分布的平稳随机过程。利用激光扫描仪做强震记录数字化,工作效率很高。本文给出了激光扫描仪分析处理软件和消除数字化噪声实例。

Detailed analysis of digitization errors from the processing of digitizing strong motion accelerograms using digitizer and scanner and their elimination method are done and processing software is developed in this paper. It shows that the digitization errors can be considered as a superposition of systematic errors introduced by the digitizing equipment and random noise errors produced mainly by operators. It also shows that the random noise is an ergodic stationary random process, the amplitudes of which are of normal Gaussian distribution. Specially, work efficiency will be improved using scanner. Analysis and processing software of scanner and example of the elimination digitization errors are presented in this paper.