A detection method for positioning accuracy of 3D phantom system based on laser tracker and monocular vision
Aiming at the problems of fewer detection methods of medical 3D phantom and complicated detection process,a measurement system of positioning accuracy of 3D phantom system based on monocular vision and laser tracker is proposed.The comparison experiment of the positioning accuracy of 3D phantom system based on the laser tracker verifies that the positioning accuracy of the 3D phantom system is consistent in the presence and absence of water.The experimental results of the positioning accuracy of 3D phantom system based on monocular vision show that the positioning error of the X axis,Y axis,Z axis and spatial diagonal line is within 0.050 mm,the repeatability is 0.030,0.064,0.056,0.140 mm,the verticality of the X axis and Y axis is 0.800 mm,the verticality of the Y axis and Z axis is 0.761 mm,and the verticality of the X axis and Z axis is 0.503 mm,which is comparable to the measurement accuracy of the laser tracker.Finally,the standard deviation of the distance measurement error of adjacent points is 0.0187 mm after uncertainty analysis,which meets the detection requirements.Both methods can realize non-contact measurement,simplify the complicated detection process,and meet the daily detection needs of the hospital for medical linear accelerator.
3D phantomlaser trackermonocular visionpositioning accuracy
NETL
NSTL
万方数据
