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物探与化探  2015, Vol. 39 Issue (S1): 22-27    DOI: 10.11720/wtyht.2015.S1.05
  国家高技术研究发展计划项目(2011AA060501)专题 本期目录 | 过刊浏览 | 高级检索 |
重力梯度仪用石英挠性加速度计伺服线路噪声分析
雷立铭1, 舒晴2, 杨晔1, 程关德1
1. 天津航海仪器研究所, 天津 300131;
2. 中国国土资源航空物探遥感中心, 北京 100083
Noise analysis of QFA servo circuit for gravity gradiometer
LEI Li-Ming1, SHU Qing2, YANG Ye1, CHENG Guan-De1
1. Tianjin Navigation Instrument Research Institute, Tianjin 300131, China;
2. China Aero Geophysical Survey & Remote Sensing Center for Land And Resources, Beijing 100083, China
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摘要 

高分辨率加速度计是重力梯度测量的核心传感器,其中石英挠性加速度计是目前重力梯度测量中主要使用的加速度计,对其噪声性能有严格的要求.为此提出一种新型基于交流恒压激励的差分电容检测原理的石英挠性加速度计低噪声伺服前放电路,在此基础上,结合加速度计表体参数和伺服线路校正参数,研制出完整的伺服线路.在系统工作频率上对伺服系统带来的噪声影响做出定量分析,其对系统的总体噪声影响约为1.0×10-10g/√Hz(0.5Hz),可以满足10E以上分辨率的重力梯度测量需要.

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Abstract

High resolution accelerometer is a kernel sensor for gravity gradiometer measurement.The QFA is mostly used in this measurement at present,so the requirement of noise performance is very strict.Therefore,a new type low-noise QFA preamplifier is put forward to detect differential capacitor based on constant AC voltage stimulation.On such a basis,the integral servo circuit is designed in combination with the parameters of QFA and servo circuit calibration.The quantitative analysis of the noise influence of servo circuit has been done,the noise contribution of the circuit to the QFA servo system is approximately 1.0×10-10 g/√Hz(0.5Hz) at 0.5Hz.This can satisfy the needs of gravity gradiometer measurement above 10E resolution.

收稿日期: 2015-12-04      出版日期: 2015-12-31
:  U666.12+2  
基金资助:

国家高技术研究发展计划(863计划)(2011AA060501)

作者简介: 雷立铭(1967-),男,研究员,现从事重力信息测量技术方向研究工作.
引用本文:   
雷立铭, 舒晴, 杨晔, 程关德. 重力梯度仪用石英挠性加速度计伺服线路噪声分析[J]. 物探与化探, 2015, 39(S1): 22-27.
LEI Li-Ming, SHU Qing, YANG Ye, CHENG Guan-De. Noise analysis of QFA servo circuit for gravity gradiometer. Geophysical and Geochemical Exploration, 2015, 39(S1): 22-27.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2015.S1.05      或      https://www.wutanyuhuatan.com/CN/Y2015/V39/IS1/22

[1] Keefe O.Gravity gradiometer[J].United State Patent,1999,13(3).

[2] Metzger E H. Recent gravity gradiometer development[J].AIAA,1977:77-1081.

[3] 高晋占.微弱信号检测[M].北京:清华大学出版社,2004.

[4] 顾英.石英挠性加速度计伺服电路的原理与计算[D].

[5] 绪方胜彦.现代控制工程[M].北京:科学出版社,2006.

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