上海光源准直测量方案设计

 上海光源在准直测量方案设计中面临的最大挑战来自于松软地基及高精度的定位要求。上海光源的准直过程分为控制网测量、元件标定、预安装准直、现场安装及平滑测量5个关键步骤。采用激光跟踪仪和静力水准系统等测量手段，将控制网精度设计为0.08 mm，其余步骤精度达到0.05 mm，以保证相邻共架机构的准直精度达到0.12 mm，优于0.15 mm的设计指标。方案在注重精度指标的同时，还兼顾了可靠性、测量效率、费用及实时监测的可能性。

Survey and alignment design of Shanghai synchrotron radiation facility

The biggest challenge of survey and alignment is the soft groundwork and the tight positioning requirement for Shanghai Synchrotron Radiation Facility.Control network,fiducialization,pre-alignment and installation on site and smoothing are five crucial steps for the installation and alignment process.By utilizing the laser tracker and hydrostatic levelling system,the error budget should be within 0.08 mm for control network and 0.05 mm for the other steps.The expected error budget is 0.12 mm for elements between girders,which is a little smaller than the requirement of 0.15 mm.Besides the target of error control,reliability,efficiency,cost and real-time monitoring are factors considered in the design.