地震计校准及其传递函数一致性研究
Investigation of Seismometer Calibration and Consistency with Transfer Function
孔垂捷 1左爱斌 2周劲峰1
作者信息
- 1. 北京工业大学,北京 100124
- 2. 中国计量科学研究院,北京 100029
- 折叠
摘要
采用超低频振动国家基准装置,以典型地震计 3T-120PH为例,开展地震计灵敏度校准工作.将振动校准数据结果与地震计的传递函数结果进行比较分析.当频率较低时(10Hz以下),振动校准结果与传递函数结果一致性非常好,当频率较高时(10Hz以上)二者开始出现分化.由于振动校准方法真实地将振动信号传递给地震计,符合实际使用情况,因此地震计采用振动台校准方法比电标法结果更能反应地震计工作时的真实性.
Abstract
This study employs the national standard ultra-low frequency vibration apparatus to conduct sensitivity calibration of seismometers,using the 3T-120PH as a typical example.The vibration calibration data are compared and analyzed against the seismometer's transfer function results.At lower frequencies(below 10 Hz),the vibration calibration results show excellent agreement with the transfer function results.However,at higher frequencies(above 10 Hz),discrepancies begin to emerge between the two methods.The vibration calibration method realistically transmits vibration signals to the seismometer,closely mimicking actual usage conditions.Consequently,the shaker calibration method provides a more accurate representation of the seismometer's performance under real working conditions compared to the electrical calibration method.This study highlights the importance of using appropriate calibration techniques for ensuring the accuracy and reliability of seismometer measurements across different frequency ranges.
关键词
计量学/地震计/振动台校准/传递函数Key words
metrology/seismometer/shaker calibration/transfer function引用本文复制引用
基金项目
国家重点研发计划(2022YFF0608901)
出版年
2024
NETL
NSTL
万方数据