科研之友
微信
新浪微博
Facebook
分享链接
摘要
A calibration method based on distance error identification was proposed for ground 3D laser scanner. The structure and optical system of the instrument were introduced, and various system errors of the instrument were analyzed, and the error correction algorithm was designed. In the calibration process, multiple targets were arranged in a large range, and the space coordinates of the targets were measured at different positions from the targets by the terrestrial 3D laser scanner. Then the distance between any two targets were calculated, and the instrument correction parameters were identified according to the calibration algorithm. The calibration method neither to obtain the spatial coordinates of the target, nor to perform the conversion between the scanner coordinate system and the world coordinate system can greatly reduce the number of calibration parameters. The calibration test and the accuracy verification test showed that the measurement accuracy of the points near 10 m, 20 m, and 30m from the instrument were respectively ±2.7 mm, ±2.9 mm, ±4.1 mm, and met the accuracy index requirements of ±(2+L/10 000)mm. The calibration method was easy to operate, had low requirements for calibration conditions, and had strong practicability.
- 单位
