摘要
精确测量绝对重力仪参考棱镜的振动信号并将其用于补偿绝对重力测量值是提高绝对重力仪测量精度的一种解决方案。对此,本文介绍了参考棱镜振动测量的原理,设计了参考棱镜振动加速度测量装置,推导参考棱镜振动测量装置的传递函数。研究表明,可以将测量装置等效为加速度计,通过成熟的加速度计测量方法,可获得等效的加速度计传递函数参数,从而得到测量装置输出电压对参考棱镜振动加速度的传递函数,该函数能够解算出参考棱镜的振动加速度,以补偿绝对重力测量值。在实验室测得的数据与理论数据相符的基础上,通过在北京国家地球观象台做垂直振动摆的振动实验得出,实验曲线与理论模型公式刻画的幅频特性曲线重合,验证了参考棱镜振动测量装置在实际中使用的可靠性。
Accurately measuring the vibration signal of the absolute gravimeter reference prism and using it to compensate for the absolute gravity measurement is one solution to improve the measurement accuracy of the absolute gravimeter.In this regard,this article introduces the principle of reference prism vibration measurement,designs a reference prism vibration acceleration measurement device,and derives the transfer function of the reference prism vibration measurement device.The result shows that the measurement de-vice can be equivalent to an accelerometer.Through mature accelerometer measurement methods,equivalent accelerometer transfer function parameters can be obtained,thereby obtaining the transfer function of the output voltage of the measurement device to the vi-bration acceleration of the reference prism.The vibration acceleration of the reference prism can be solved to compensate for absolute gravity measurement.On the basis that the data measured in the laboratory are consistent with the theoretical data,through the vibra-tion experiment of the vertical vibrating pendulum at the National Earth Observatory in Beijing,it is found that the experimental curve coincides with the amplitude-frequency characteristic curve described by the theoretical model formula,verifying the reliability of the reference prism vibration measurement in actual use.
作者
黄诗
朱小毅
薛兵
张兵
吴旭
HUANG Shi;ZHU Xiao-yi;XUE Bing;ZHANG Bing;WU Xu(Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,China)
出处
《地震》
CSCD
北大核心
2024年第1期50-63,共14页
Earthquake
关键词
绝对重力仪
参考棱镜
减振技术
振动测量
Absolute gravimeter
Reference corner cube
Vibration reduction technique
Vibration measurement
