三维升降转台是高海拔宇宙线观测站(Large High Altitude Air Shower Observatory,LHAASO)广角切伦科夫望远镜阵列(Wide Field of View Cherenkov Telescope Array,WFCTA)成像激光雷达标定系统的核心组成部分,主要由慢控子系统(Programm...三维升降转台是高海拔宇宙线观测站(Large High Altitude Air Shower Observatory,LHAASO)广角切伦科夫望远镜阵列(Wide Field of View Cherenkov Telescope Array,WFCTA)成像激光雷达标定系统的核心组成部分,主要由慢控子系统(Programmable Logic Controller,PLC)、机械子系统和标准零点子系统构成,用于精确控制激光束的出射方向。采用高精度数字图像处理技术对三维升降转台的性能进行研究,结果表明,旋转和升降定位精度分别为0.005°和0.056 mm,重复精度分别为0.003°和0.075 mm,满足成像激光雷达标定系统的实验要求。三维升降转台的自动控制巡航功能有效减少了人工干预,提高了系统远程使用的可靠性和效率。标准零点的校准功能可以有效监测三维升降转台的定位精度,并且在失准的情况下能够实现远程校准,确保三维升降转台长期高精度稳定运行。展开更多
In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was prop...In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was proposed.Standard datum planes and standard scales were designed as standard component,and the indication error can be calculated by comparing the standard component and the measured value between zero position and 500 mm scale.The alignment of scribed lines was realized by machine vision,and the float pixel equivalent method was applied in image process.Experimental results prove that this system meets the requirement of national standard steel tape verification regulation,and the repeatability of zero error can reach 0.006 mm after zero calibration.展开更多
文摘三维升降转台是高海拔宇宙线观测站(Large High Altitude Air Shower Observatory,LHAASO)广角切伦科夫望远镜阵列(Wide Field of View Cherenkov Telescope Array,WFCTA)成像激光雷达标定系统的核心组成部分,主要由慢控子系统(Programmable Logic Controller,PLC)、机械子系统和标准零点子系统构成,用于精确控制激光束的出射方向。采用高精度数字图像处理技术对三维升降转台的性能进行研究,结果表明,旋转和升降定位精度分别为0.005°和0.056 mm,重复精度分别为0.003°和0.075 mm,满足成像激光雷达标定系统的实验要求。三维升降转台的自动控制巡航功能有效减少了人工干预,提高了系统远程使用的可靠性和效率。标准零点的校准功能可以有效监测三维升降转台的定位精度,并且在失准的情况下能够实现远程校准,确保三维升降转台长期高精度稳定运行。
文摘In view of the movable hook structure on zero position,the traditional system could not recognize the zero scale.According to the essential requirements of the measurement,a new system based on machine vision was proposed.Standard datum planes and standard scales were designed as standard component,and the indication error can be calculated by comparing the standard component and the measured value between zero position and 500 mm scale.The alignment of scribed lines was realized by machine vision,and the float pixel equivalent method was applied in image process.Experimental results prove that this system meets the requirement of national standard steel tape verification regulation,and the repeatability of zero error can reach 0.006 mm after zero calibration.
