高精度倾角传感器在测量车载平台变形中的应用  

Application of high accuracy inclinometer to deformation measurement for vehicular platform

作　　者：佟刚[1,2] 王涛[1] 吴志勇[1] 李增[1,2] 陈涛[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《光学精密工程》2010年第6期1347-1353,共7页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2008AA7034320B)

摘　　要：为了分析车载平台变形对光电经纬仪测角误差的影响,提出了利用倾角传感器来测量车载平台变形的方法。基于平台变形对光电经纬仪测角误差的影响的基本原理,利用固定在垂直轴轴心的倾角传感器测量出因平台变形而导致经纬仪工作基准面中心点与水平面变化的夹角,计算其测量坐标系的变化量,推导出了倾角传感器输出值与测角误差的关系公式。选用双轴倾角传感器实时测量了经纬仪工作时车载平台的变形值,结果表明,车载平台变形量受方位方向速度影响较小,倾角传感器输出值经过滑动加权均值滤波处理后最小相差为0,最大相差为5.1″;受经纬仪视轴位置影响较大,高低角在0°～90°变化时,高低角越小,倾角传感器输出值越大。这种测量方法为进一步提高车载经纬仪的测角精度提供了理论依据。To analyze the influence of the deformation of a vehicular platform on the angle measurement precision of a theodolite,a new method was presented to measure the deformation of the vehicle platform by using a inclinometer.Based on the principle of platform deformation dependent on measuring results,the inclinometer was put on the center of the vertical axis to get deformation angles of the center of working platform,then to calculate the measuring coordinate deflection and figure out the expressions on the output data of the inclinometer and angle measurement errors.A double-axis inclinometer was chosen to measure the deformation of the vehicle platform in real time.Experimental data show that the deformation sufferring from an azimuth axis velocity is small and the reading results after processing by a sliding weighted mean digital filter are 0 and 5.1″ for the smallest discrepancy and the biggest one,respectively.However,the boresight location has larger influence on the deformation,and the smaller elevation angles are,the larger the reading results of inclinometer are.This test provides the theoretics for improving angle measurement precision of vehicular platforms of theodolites.

关 键 词：车载平台 变形 光电经纬仪 倾角传感器 测角误差 

分 类 号：V556[航空宇航科学与技术—人机与环境工程] TB922[一般工业技术—计量学]