摘要
动基座重力测量在大地测量和地球物理领域扮演重要角色。已有实践表明,基于陀螺稳定平台和精密机械重力敏感结构的动基座重力仪具有良好的抑制载体运动相关误差的能力。过去的几年里,一种新的基于二轴陀螺稳定平台和弹簧型轴对称重力敏感探头的动基座重力仪(CHZII)得以构建和试验。本文主要介绍了上述新式重力仪,分析了与载体相关的误差模型,并在实验室和海洋测量中对其性能进行了测试分析。试验表明,在工作状态下该系统的与载体运动相关的残余误差小于1mGal(~1×10^(-5)m/s^(2))。2016-2017年间,CHZII工程样机在海上进行了重复性测试及和KSS32重力仪的同船对比测试,表明该仪器的重力测量精度达到1.1mGal,符合设计预期。
Mobile gravity survey plays a paramount role in many research felds,particularly geophysics and geodesy.Mobile gravimeters with delicate mechanisms and gyroscopestabilized platforms are robust to motion-induced errors.In the past few years,a novel springbased mobile gravimeter,CHZII,constructed with a sensitive probe based on an axisystematic mechanism and supported by a two-axis gyro platform,has been developed for mobile gravity surveys.This study mainly analyzes the system and models measurement errors derived from carrier motions.The system’s performance was varied in a laboratory and on the sea.The constructed system experimentally shows that the residual error introduced by carrier motions is less than 1 mGal(~1×10^(−5)m/s^(2))in general working conditions due to the delicate mechanical design and precise assembly.A repeatability test for the CHZII engineering prototype and a comparison test with a KSS32 gravimeter have been conducted in 2016–2017,demonstrating that the measurement accuracy approaches 1.1 mGal,which is con-sistent with the expectation.
作者
涂海波
何建刚
胡明
梁星辉
刘雷钧
董琴琴
刘孙君
张会
付永涛
郎俊健
孙恒
柳林涛
Tu hai-bo;He jian-gang;Hu Ming;Liang xing-hui;Liu Lei-jun;Dong qin-qin;Liu sun-jun;Zhang Hui;Fu yong-tao;Lang jun-jian;Sun Heng;Liu lin-tao(Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China)
基金
supported by National Scientific Instrument Development Fund(No.2011YQ120045)
State Natural Sciences Fund(No.42074220,41474163,91636112,41874217).
