CHZ-Ⅱ海洋重力仪研制与实践  

Development and practice of CHZ-Ⅱ marine gravimeter

作　　者：柳林涛 何建刚 许江宁[2] 刘雷钧 高金耀 孙中苗[4] 吴太旗[5] 梁星辉 胡明 郎骏健 何泓洋[2] LIU Lintao;HE Jiangang;XU Jiangning;LIU Leijun;GAO Jinyao;SUN Zhongmiao;WU Taiqi;LIANG Xinghui;HU Ming;LANG Junjian;HE Hongyang(State Key Laboratory of Geodesy and Earth s Dynamics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China;Naval University of Engineering,Wuhan 430033,China;The Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061,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 [2]海军工程大学,湖北武汉430033 [3]自然资源部第二海洋研究所,浙江杭州310012 [4]西安测绘研究所,陕西西安710054 [5]海军海洋测绘研究所,天津300061

出　　处：《测绘学报》2024年第4期620-628,共9页Acta Geodaetica et Cartographica Sinica

基　　金：国家重大科学仪器开发专项(2011YQ120045)。

摘　　要：海洋重力仪是获取高精度高分辨率海洋重力场的重要仪器,主要应用于资源勘探、大地水准面精化、海洋科学研究和重力辅助惯性导航等领域。我国现有的海洋重力仪主要依靠国外进口,不仅价格高,而且在仪器的引进、维护等方面存在诸多的不便。在科技部首批重大科学仪器专项的支持下,基于CHZ海洋重力仪成功研制出具有完全自主知识产权的CHZ-Ⅱ弹簧式海洋重力仪。该新型重力仪采用金属零长弹簧作为测量元件,其独特的轴对称垂直悬挂结构可克服交叉耦合效应;高精度伺服控制技术及强阻尼的应用可克服载体扰动的影响,确保仪器在不同海况下保持测量精度;高精度恒温技术及温度补偿技术可消除环境温度波动对仪器测量精度的影响。本文介绍了该仪器的工作原理、系统构成、技术特点及测试结果。静态试验表明其月漂移优于3 mGal;码头系泊试验表明其动态精度达到0.2 mGal,能清晰反映海潮的重力变化特征;总航程超过5万海里船载试验表明其综合测量精度优于1 mGal。仪器在精度和稳定性上达到与国内外同类仪器并跑水平,可替代当前国外进口的海洋重力仪。Marine gravimeter is an important instrument to obtain high-precision and high-resolution marine gravity field,which is mainly used in resource exploration,geoid refinement,marine science research and gravity assisted inertial navigation.The existing marine gravimeters in China mainly rely on foreign imports,which not only have high prices,but also have many inconveniences in the introduction and maintenance of the instruments.With the support of the major scientific instrument projects of the Ministry of Science and Technology,the CHZ-Ⅱspring type marine gravimeter with completely independent intellectual property rights has been successfully developed based on the CHZ marine gravimeter.The new gravimeter uses metal zero length spring as the measuring element,and its unique axisymmetric vertical suspension structure can overcome the cross coupling effect.The application of high-precision servo control technology and strong damping can overcome the influence of carrier disturbance and ensure that the instrument maintains measurement accuracy under different sea conditions.High precision constant temperature technology and temperature compensation technology can eliminate the influence of ambient temperature fluctuation on the measuring accuracy of the instrument.This paper introduces the working principle,system structure,features and test results of the instrument.The static test shows that its monthly drift is better than 3 mGal;the wharf mooring test shows that its dynamic accuracy reaches 0.2 mGal,which can clearly reflect the gravity variation characteristics of sea tide;the ship borne test with a total voyage of more than 50000 nautical miles shows that the comprehensive measurement accuracy is better than 1 mGal.To sum up,the accuracy and stability of the instrument have reached the level of the same kind of instruments at home and abroad,which can replace the current imported marine gravimeter.

关 键 词：CHZ-Ⅱ海洋重力仪 零长弹簧 硅油阻尼 高精度恒温技术 陀螺稳定平台 海洋重力测量 

分 类 号：P229[天文地球—大地测量学与测量工程]