摘要
在前阶段理论研究的基础上，搜寻到了几种高阶脉冲波形，其频谱的低频分量平坦，高频分量更丰富。据此制成功能完善，性能优良的标定器。用高阶脉冲标定器产生的标定电流来激励拾震器，使观测系统产生相应的响应，由计算机采集该响应，并进行富氏变换及相关运算。由此可得到系统的幅频特性Ｋ（ω），为暂态标定结果。对于速度平坦型观测系统暂态标定与稳态标定所得的系统幅频特性曲线完全重合，即标定精度相同。
In the previous theoretical study,several kinds of pulse forms were found.The amplitudes are relatively constant in the low frequency section while vary much more in the high frequency section.On basis of this,a new calibrator was made to have the complete functions and excellent property.Let the current generated by the calibration pass the seismometer amd make the observation system output the corresponding response,and then the response is collected by the computer.Fourier transforming the collected response and some other operations lead to the amplitude frequency characteristics of the system,which is regarded of temporal state.For the observation system with the flat type of velocity response,the calibration precision is considered the same when the curves of amplitude frequency for temporal state and steady state calibration are coincided with each other.
出处
《地震地磁观测与研究》
1999年第2期60-67,共8页
Seismological and Geomagnetic Observation and Research
基金
地震科学联合基金资助课题
关键词
高阶脉冲
观测系统
幅频特性
标定器
high order pulse,response of observation system,amplitude response
