Phase Stereo Matching Based Three Dimensional Morphometry of Metal Fractures
To analyze the mechanical properties of metal materials,the morphology of metal fracture is analyzed to evaluate the metal properties.To obtain accurate three dimensional morphology of the fracture accurately,a three dimensional morphology measurement system of metal fracture based on phase stereo matching is designed.Fringe patterns projected on the fracture surface of metal speci-mens are collected by camera.The phase information of fracture surface is calculated by using multi-frequency phase-shift heterodyne algorithm.The three dimensional morphology of fracture surface is obtained by phase stereo matching.The phase stereo matching algo-rithm can solve the problem of low matching accuracy and information loss of the point cloud in the weak texture area of metal fracture.The measurement experiment of metal measuring block shows that the accuracy of the system can meet the requirements of analyzing the properties of metal materials.The metal samples of brittle and plastic materials with distortion and bending fractures are measured,and the three-dimensional topography data of the metal fractures are obtained.Experimental results show that the measurement error of the proposed method is less than 0.05mm,ensuring the matching accuracy and dense point cloud information in the weak texture area of metal fracture.The proposed system has a good application prospect in metal material mechanics experiment.
万方数据
维普
