High-precision three-dimensional measurement method of workpiece based on line-structured light scanning
To improve the measurement accuracy and efficiency of complex contour of workpieces in industry,we designed a high-precision non-contact three-dimensional measurement system and proposed a three-dimensional measurement method for workpiece profiles based on line-structured light scanning.First,high-precision cameras and a three-axis moving platform were utilized to acquire line-structured light images.Subsequently,we proposed a grayscale centroid algorithm based on differential intervals to accurately and efficiently extract the centerline of the line-structured light and generate raw point cloud data.Next,the essential preprocessing of this point cloud data was conducted through filtering and simplification.Finally,the preprocessed point cloud data was precisely registered with the computer aided diagnosis model to perform measurement and error assessment of the workpiece surface profile.Experimental results demonstrate that the absolute errors of the measured workpiece profile height are less than 0.07 mm,with relative errors in 0.5％.The proposed three-dimensional measurement system and its associated methodology reduce measurement errors and achieve high-precision three-dimensional measurement of workpieces,providing significant industrial application value.
万方数据
维普
