地球科学进展 ›› 2021, Vol. 36 ›› Issue (5): 520 -527. doi: 10.11867/j.issn.1001-8166.2021.049

新学科·新技术·新发现 上一篇    下一篇

载体垂向扰动对轴对称型金属弹簧海洋重力仪的影响
刘雷钧( ), 何建刚, 涂海波, 郎骏健, 柳林涛( )   
  1. 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,湖北 武汉 430077
  • 收稿日期:2021-01-25 修回日期:2021-04-06 出版日期:2021-06-18
  • 通讯作者: 柳林涛 E-mail:liuleijun@apm.ac.cn;llt@whigg.ac.cn
  • 基金资助:
    国家自然科学基金青年科学基金项目“轴对称型金属弹簧动态相对重力仪非线性误差抑制关键技术研究”(41804170);国家自然科学基金面上项目“静电悬浮重力仪测量环路线性化的理论与实验研究”(41874217)

Influence of Vertical Disturbance from the Carrier on Axisymmetric Metal Spring Marine Gravimeter

Leijun LIU( ), Jiangang HE, Haibo TU, Junjian LANG, Lintao LIU( )   

  1. State Key Laboratory of Geodesy and Earth's Dynamics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China
  • Received:2021-01-25 Revised:2021-04-06 Online:2021-06-18 Published:2021-07-02
  • Contact: Lintao LIU E-mail:liuleijun@apm.ac.cn;llt@whigg.ac.cn
  • About author:LIU Leijun (1984-), male, Yichang City, Hubei Province, Senior engineer. Research areas include gravity measurement technology and instrument. E-mail: liuleijun@apm.ac.cn
  • Supported by:
    the National Natural Science Foundation of China "Research on the nonlinear error suppression of dynamic relative gravimeter with axisymmetric metal spring"(41804170);"Theoretical and experimental research of the measurement linearization of an electrostatic suspension gravimeter"(41874217)

轴对称型金属弹簧海洋重力仪在动态测量中不可避免地要受到载体扰动加速度的影响,以中国科学院精密测量科学与技术创新研究院研制的CHZ-Ⅱ型海洋重力仪为例,在建立其测量模型的基础上,着重分析了载体垂向扰动对重力仪的电容微位移检测以及动态非线性误差的影响。结果表明:载体垂向扰动加速度的大小直接影响电容微位移检测的输出,且垂向扰动加速度是海洋重力仪非线性误差的直接影响因素。这对提高海洋重力仪的动态测量精度有重要意义。

The axisymmetric metal spring marine gravimeter is inevitably affected by carrier disturbance in dynamic measurement. Taking CHZ-Ⅱ marine gravimeter developed by Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences as an example, we set up its measuring model by mechanical analysis under working condition, and analyzed the influence of carrier disturbance on capacitance micro displacement detection. The results show that the vertical disturbance acceleration of the carrier directly affects the output of capacitance micro displacement detection of CHZ-Ⅱ marine gravimeter. We also analyzed the influence of carrier disturbance on dynamic nonlinear error of the gravimeter. The conclusions are as follows: Disturbance acceleration from the carrier (such as survey ship, investigation boat) is the direct factor of the marine gravimeter's nonlinear error. The dynamic nonlinear error is positively correlated with the amplitude of disturbance acceleration and the frequency of disturbance acceleration. The research in this paper is of great significance to improving the dynamic measurement accuracy of marine gravimeter.

中图分类号: 

图1 CHZ-Ⅱ型海洋重力仪测量原理示意图
Fig.1 Diagram of the measuring principle of CHZ-Ⅱ marine gravimeter
图1 CHZ-Ⅱ型海洋重力仪测量原理示意图
Fig.1 Diagram of the measuring principle of CHZ-Ⅱ marine gravimeter
图2 拉丝及绷簧结构示意图
Fig.2 Diagram of the filaments and tension springs
图2 拉丝及绷簧结构示意图
Fig.2 Diagram of the filaments and tension springs
图3 CHZ-Ⅱ型重力仪重力敏感单元力学模型
Fig.3 Mechanical model of the gravity sensitive part of the CHZ-Ⅱ gravimeter
图3 CHZ-Ⅱ型重力仪重力敏感单元力学模型
Fig.3 Mechanical model of the gravity sensitive part of the CHZ-Ⅱ gravimeter
图4 CHZ-Ⅱ电容微位移测量示意图
Fig.4 Diagrammatic sketch of the capacitance micro displacement measuring system of CHZ-Ⅱ
图4 CHZ-Ⅱ电容微位移测量示意图
Fig.4 Diagrammatic sketch of the capacitance micro displacement measuring system of CHZ-Ⅱ
5电容检测电路
Fig.5 The capacitance detection circuit
5电容检测电路
Fig.5 The capacitance detection circuit
图6 机械零位与电零位不重合时拉丝及绷簧的形态
Fig.6 The form of the filaments and tension springs when the mechanical zero position does not coincide with the electrical zero position
图6 机械零位与电零位不重合时拉丝及绷簧的形态
Fig.6 The form of the filaments and tension springs when the mechanical zero position does not coincide with the electrical zero position
图7 不同扰动加速度幅值对应的非线性误差
Fig.7 Nonlinear errors corresponding to different disturbance acceleration amplitudes
图7 不同扰动加速度幅值对应的非线性误差
Fig.7 Nonlinear errors corresponding to different disturbance acceleration amplitudes
图8 不同扰动加速度频率对应的非线性误差
Fig.8 Nonlinear errors corresponding to different disturbance acceleration frequencies
图8 不同扰动加速度频率对应的非线性误差
Fig.8 Nonlinear errors corresponding to different disturbance acceleration frequencies
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