载体垂向扰动对轴对称型金属弹簧海洋重力仪的影响  

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

作　　者：刘雷钧 何建刚 涂海波 郎骏健 柳林涛 LIU Leijun;HE Jiangang;TU Haibo;LANG Junjian;LIU Lintao(State Key Laboratory of Geodesy and Earth's Dynamics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China)

机构地区：[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

出　　处：《地球科学进展》2021年第5期520-527,共8页Advances in Earth Science

基　　金：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”(编号: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”(编号:41874217)资助。

摘　　要：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.

关 键 词：海洋重力仪 垂向扰动 微位移检测 非线性误差 

分 类 号：P716.81[天文地球—海洋科学]