光电经纬仪提高多传感器测量精度的方法

为了得到多信息进行信息融合,光电经纬仪采用多传感器的方法,即在主视轴及辅助视轴上安装了传感器。作为获得信息的多种手段,主视轴传感器获得的测量数据,分析处理数据按常规方法计算即可;辅助视轴与主视轴存在平行度,辅助视轴传感器获得的测量数据,处理时必须对结果进行修正。在精度要求不高的情况下,通常的方法是直接在辅助视轴传感器获得的方位角、高低角修不平行度。本文采用坐标变换方法推导出辅助视轴误差修正模型,直接获得目标的方位角、高低角;实验证明,在高低角〈45°时,精度可提高10%。

Improving Method for Measurement Precision of Mutlti-sensor Opto-electronic Theodolites

In order to obtain more information to conduct data fusion,the multi-sensor method was used in the photoelectric theodolite,namely that the sensor was fixed on the main LOS（line of sight） and the assist LOS.For the measurement data from the main LOS sensor,conventional method could be applied to the analysis and processing of data.Because of non-parallelism between the main LOS（line of sight） and the assist LOS,the result must be corrected when processing the measurement data from the assist LOS sensor.In the case of low precision damand,the usual method was using the azimuth and elevation angle obtained from the assist LOS sensor to directly correct the non-parallelism.In this paper,the method of coordinate transformation was used to derive the error correction model of the assist LOS,the azimuth and elevation angle of the target could be directly obtained.Experiments showed that the accuracy could be increased by 10% when the elevation angle was less than 45°.