摘要
分析了激光干涉校准的基本原理,应用绝对校准法开展强震动加速度计的相位测试,通过振动校准试验,在振动台与强震动加速度计的记录输出波形中找出振幅变化趋势,以叠加两个波形的延时对比推断出强震动加速度计的相位差。实例证明,绝对校准可为标准强震动加速度计的性能校准奠定高精度基础。
We analyzed the basic principle of laser interferometer calibration and applied absolute calibration method to the phase test of strong motion accelerometer. Then we respectively found the amplitude variation tendency of the output waveforms recorded by vibrating table and strong motion accelerometer by vibration calibration test. Ac- cording to delay stacking of their waveform, we compared and inferred the phase difference of the strong motion accelerometer. The example proved that laser absolute calibration is the base of implementing the high precision of performance calibration of standardized strong motion accelerometer.
出处
《地震研究》
CSCD
北大核心
2013年第1期116-122,142,共7页
Journal of Seismological Research
基金
地震行业科研专项"宁洱64级地震现场综合考察和研究(200808061)项目资助
关键词
绝对校准法
激光干涉仪
强震动加速度计
相位测试
absolute calibration method
laser interferometer
strong motion accelerometer
phase test
