捷联式移动平台重力仪地面测试结果

Ground Test Results of a Strap-down Gravimeter Used on the Movable Platform

自主研制移动平台重力仪对我国矿产资源勘探及测绘等领域具有重要意义。研制了一种基于激光捷联惯导的移动平台重力仪,根据移动平台重力测量应用需求及激光捷联惯导系统特点,采用高精度石英挠性加速度计作为重力测量传感器,安装于系统垂向通道,既可作为导航用垂向加速度计,又用于实现标量重力测量。介绍了工程样机系统的组成。利用重力场随高度升高衰减的原理,以相邻楼层间的重力测量差值评价了系统的静态精度;通过地面跑车试验,获得了系统动态测量内符合精度。

Independently developed movable platform gravimeter is of great significance to our mineral resources exploration and survey areas. A movable platform gravimeter based on the laser strap-down inertial navigation system is developed. Considering the application demands of movable platform gravity measurement and the features of the laser strap- down inertial navigation system, the gravity sensor is quartz flexure accelerometer installed in the vertical channel and used as the vertical navigation accelerometer at the same time of measuring the scalar gravity. The work principle of the engineering prototype is introduced. The static precision is tested through the differential gravity measured between neighboring floors, which utilizes the principle that the gravity decays along with the increasing height. The dynamic tests on ground-vehicle are carried out and the internal consistency is calculated.