林业工程学报2017，Vol.2Issue(6)：116-120,5.DOI:10.13360/j.issn.2096-1359.2017.06.020
基于激光三角测距的锯材表面缺陷检测方法
Detecting method for surface defect of swan timber based on laser triangulation
摘要
Abstract
In order to achieve the automatic online detection of wood surface defects,such as wane and crack,a new method based on laser triangulation and computer image processing for surface defects of sawn timber was proposed.The laser triangulation measurement was conducted by a laser beam focused on the object surface to be measured,and the laser spots on the timber surface were imaged from another angle.Through the image processing,the profile of wane and crack defects were identified and removed,the profile of external face was retained,and the information of the external face and crack width were obtained.The experiments were carried out with seven pieces of unedged sawn timber with wane and seven pieces of sawn timber with crack.The results showed that,when the incident angle of the laser beam was 60°,the average error of the measurement for external face and crack width were all not more than ± 1 mm,indicating that the proposed detection model and the detection device for surface defects of sawn timber had high detection accuracy.This detecting model for surface defects of sawn timber can meet the requirements of the sawn timber detection,provide the basic data for the optimum sawing in the wood processing,improve the utilization ratio of wood resources,and can be directly used in the automatic and intelligent production line of wood processing.关键词
激光三角测距/木材表面缺陷/在线检测/图像处理/霍夫变换Key words
laser triangulation/wood surface defects/on line detection/image processing/hough transformation分类
农业科技引用本文复制引用
张未,吕志娟,徐兆军,朱南峰..基于激光三角测距的锯材表面缺陷检测方法[J].林业工程学报,2017,2(6):116-120,5.基金项目
江苏省科技支撑计划项目(BN2015142). （BN2015142）
