基于高速相机的多叶光栅机械性能测试方法研究

Research on testing methods for mechanical properties of multi-leaf collimator based on high-speed camera

摘要: 基于高速相机搭建了多叶光栅机械性能测试平台，进行了实验测试和数据处理，研究了高速相机图像分辨率、采集速度及图像处理方法对机械性能测试精度的影响。结果表明，采用视野分区的形式，在40 mm×40 mm区域视野中，选用高速相机在单方向图像分辨率4 000、帧率500帧/s时，对叶片运动速度不高于250 mm/s的多叶光栅进行机械性能测试，测量精度可以达到0.01 mm。

Abstract: Based on the high-speed camera, a test platform for mechanical properties of multi-leaf collimator was built, effects of image resolution, frame rate and image processing method on the test accuracy of mechanical properties were studied. The measurement accuracy for mechanical properties of multi-leaf collimator can reach 0.01 mm with the blade movement speed not higher than 250 mm/s, when the single-direction image resolution is 4 000, the frame rate is 500FPS, in the form of field visual partition of 40 mm×40 mm.