| 惯性技术视角下动态重力测量技术评述(一):比力测量与载体动态的影响 |
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| 引用本文： | 常国宾,李胜全.惯性技术视角下动态重力测量技术评述(一):比力测量与载体动态的影响[J].海洋测绘,2014(3):77-82. |
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| 作者姓名： | 常国宾 李胜全 |
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| 作者单位： | 海军海洋测绘研究所,天津300061 |
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| 基金项目： | 国家自然科学基金（41374018）. |
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| 摘 要： | 重力测量系统中测量的重力,即重力加速度,是一种特殊的加速度,因而重力传感器是一种特殊的加速度计。在动态场合,现代重力仪一般采用基于陀螺仪构建的各种平台为重力传感器提供姿态基准。因此采用加速度计和陀螺仪这些惯性元件的动态重力测量系统可以看做是惯性技术的一种具体应用。从惯性技术的角度对动态重力测量的理论和现状进行了分析。首先介绍了在地球表面附近进行重力测量时涉及的参考坐标系。然后详细推导了动态重力测量的基本理论,即比力测量理论,指出比力方程是动态重力测量和惯性导航的共同基础。最后对不同载体对动态重力测量系统的影响与要求进行了分析。
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| 关 键 词： | 重力测量 惯性技术 比力 重力仪 惯性导航系统 加速度计 Corioris效应 Etvs效应 |
Overview on Dynamic Gravimetry in the Perspective of Inertial Technology, Part I:Specific Force Measuring and Impact of Dynamics |
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| CHANG Guobin,LI Shengquan.Overview on Dynamic Gravimetry in the Perspective of Inertial Technology, Part I:Specific Force Measuring and Impact of Dynamics[J].Hydrographic Surveying and Charting,2014(3):77-82. |
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| Authors: | CHANG Guobin LI Shengquan |
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| Institution: | ( Naval Institute of Hydrographic Surveying and Charting, Tianjin 300061, China) |
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| Abstract: | The gravity, abbreviation of the gravity acceleration, which is measured in all gravimetric systems, is a special kind of acceleration, as a result, gravimetric sensors could be viewed as a special kind of accelerometer. In the dynamic scenarios, the pose, or the attitude, based on which gravimetric sensors work, is often provided by different platforms constructed using gyroscopes in modem gravimeters. So the dynamic gravimetric systems, incorporating inertial sensors, i. e. , the accelerometers and gyroscopes, could be viewed as an application of the inertial technology. The theory and status of the dynamic gravimetry are studied in the perspective of inertial technology in this paper. First, the reference frames used in the gravimetry in the vicinity of the earth are introduced. Second, the basic theory of dynamic gravimetry, i. e. the specific force measuring theory, is derived in detail, and it is pointed out explicitly that the specific force equation is the basis of both dynamic gravimetry and inertial navigation. Third, the impacts of different craft bodies on which gravimeters are mounted and analyzed. |
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| Keywords: | gravimetry inertial technique gravimeter inertial navigation system accelerometer specific force Corioris effect Eotvos effect |
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