The High-Precision Videometrics Methods to Determining Absolute Vertical Benchmark
The mobile measurement equipment plays an important role in engineering measurement tasks and its measuring device is fixed with the vehicle platform.Therefore,how to correct the measured error in time that caused by swayed platform is a basic problem.Videometrics has its inherent advantages in solving this problem.First of all,videometrics technology is non-contact measurement,which has no effect on the target’s structural characteristics and motion characteristics.Secondly,videometrics technology has high precision especially for surface targets and linear targets in the field of view.Thirdly,videometrics technology has the advantages of automatic,real-time and dynamic.This paper is mainly for mobile theodolite.etc that works under the environment of absolute vertical benchmark and proposed two high-precision methods to determine vertical benchmark: Direct-Extracting,which is based on the intersection of plats under the help of two cameras;Benchmark-Transformation,which gets the vertical benchmark by reconstructing the level-plat.Two methods both have the precision of under 10 seconds by digital simulation and physical experiments.The methods proposed by this paper have significance both on the theory and application.
Vertical Benchmark Videometrics High-precision Swayed Platform
Liu Jinbo Zhu Zhaokun
College of Aerospace and Material Engineering, National University of Defense Technology,Hunan Key Laboratory of Videometrics and Vision Navigation, Changsha 410073
国际会议
2012第八届精密工程测量和仪器仪表国际研讨会(ISPEMI2012)
成都
英文
1-7
2012-08-08（万方平台首次上网日期，不代表论文的发表时间）