射线检测中视差法定位仿真与误差分析

以双目视觉为理论基础,建立数学模型,通过X射线成像方法对试件内部缺陷进行定位。在检测过程中,使试件移动一个小的距离,获得移动前后两幅图像,用视差方法求出缺陷深度。用仿真方法对数学模型进行了验证,用误差理论分析方法对可能影响测量结果的误差进行了重点分析,给出了各误差和测量结果的关系曲线,依据分析结果提出了调整系统参数等减小误差影响的方法。

Simulation and Error Analysis of Parallax Orientation Method in Radiographic Inspection

Based on the binocular stereo vision theory, the mathematics model was designed; the internal defects were located with the method of X-ray digital radiography. In the processing of the test, making the test piece move within a short distance and getting two pictures before and after the movement, the depth of the defects were obtained with the parallax method. The mathematics model was verified with the simulating method and the errors that probably have the influence on the measuring results with the error analysis theory, and the relation curve of each error and measuring results was found, and the method for reducing the error influence through adjusting the systematic parameters according to the analyzing results.