地面三维激光扫描仪测距精度试验研究

Research on Precision of Terrestrial 3D Laser Scanner Based on Field Calibration Test

测量距离的变化是三维激光扫描仪的扫描精度重要影响因素之一。为了研究三维激光扫描仪随着测距的变化,其内外符合精度的变化趋势及适用性,文章以中海达HS650扫描仪为研究对象,研究对棋盘靶纸中心点的识别精度,采用徕卡TS02全站仪观测数据作为外符合精度评价标准。在六种不同测距的测站分别使用扫描仪和全站仪扫描目标5次,记录数据并计算内外符合精度。试验结果表明:测距在100 m以内,内、外符合精度相对稳定,均在2 mm以内;测距在100 m^150 m之间,随着测距增加,内、外符合精度明显降低,均在16 mm以内,可满足精度要求一般的测量工程。文章研究结果对不同精度要求的测量工作测距选择具有参考价值。

The change of measurement distance is one of the important factors affecting the scanning accuracy of 3D laser scanners.In order to study the variation trend of internal and external precision and applicability of the 3D laser scanner with the change of measurement distance,this paper takes Zhonghaida HS650 scanner as the research object,and studies the recognition precision of the center point of the checkerboard target paper.The observation data of Leica TS02 total station is used as the external conformity accuracy evaluation standard.Scaning the target 5 times with the scanner and the total station at 6 different distance measuring stations,recording the data and calculating the internal and external accuracy.The experiments results show that:The internal and external accuracy is relatively stable,both within 2 mm while the measurement distance is within 100 m.With the increase of measurement distance,the internal and external precision is obviously reduced,all within 16 mm while the measurement distance is between 100 m and 150 m,which can meet the accuracy requirements.The research results of the paper have reference value for the measurement distance selection with different accuracy requirements.