| This paper introduces the field calibration method of an aerostat ballonet volume measuring device, by setting the calibration area to construct local three-dimensional coordinates of ground control points. 6 ground control points are set up beside the object. With a total station and laser prism assembly in accordance with the polar coordinate method of observation, the local three-dimensional coordinates of the precision calibration bar beside the object are observed, a calibration reference coordinate system is set up, and a complete site calibration is constructed. The measuring device for calibration acquired images in the reference coordinate system of the precision calibration point bar, the solution of exterior orientation elements is obtained for each camera measurement device, and the position and attitude are obtained to complete the calibration work. This paper presents a field calibration method that solves the measurement device calibration problem, under the condition of moving measurement device in use in any scene and the application of aerostat envelope volume measurement. |
