摘要
针对CNG储气井地下套管的安全状况,在现有金属腐蚀检测技术的基础上,提出了一种用于CNG储气井内壁缺陷检测的激光三角方法;检测器在驱动机构的带动下沿管道轴线旋转,系统控制CCD摄像机拍摄投射到管道内壁的线激光图像;通过对图像的处理,结合摄像机标定技术计算出离散点的三维坐标,完成对管道内壁腐蚀缺陷的测量;实验结果表明,该检测系统检测精度较高,具有一定的实用性。
In order to improve the safety status of the CNG station gas storage well, on the basis of the present metal corrosion detection technology, a laser triangle method is presented fur inspection of corrosion defects on the inside wall of CNG wells. The detector rotated a- long the pipeline axis, driven by a motor. The system controlled a CCD camera to capture images of a laser strip which was projected on the wall of the pipe--line. Through image processing, combined with camera calibration, the system calculated the three--dimensional coordi- nates of discrete points, complete the inspection of the corrosion defects on the inside wall of a CNG well. The experimental results show that the detection system has high accuracy. The technology and methods adopted in the system are practical.
出处
《计算机测量与控制》
CSCD
北大核心
2010年第5期1001-1003,共3页
Computer Measurement &Control
关键词
储气井
激光三角法
摄像机标定
腐蚀缺陷
CNG well
laser triangle method
camera calibration
corrosion defects
