摘要
增加测站数量是提高多边法坐标测量精度的潜在手段之一,为了研究测站数量对坐标测量精度的影响,建立了不同测站数量组合的坐标测量系统,推导了测站数量与所需标定动点数的关系。进行了4~7台测站的坐标测量系统仿真,仿真实验发现,随着测站数量从4台逐步增加至7台,测量精度依次改善了74.3%、17.5%、8.2%,系统测量误差平均值由111.1μm逐渐降为11.1μm,精度改善明显,且改善趋势逐渐减缓。进行了坐标测量精度验证实验,结果表明,随着测站数量的逐步增加,测量精度依次改善了83.9%、11.4%、4.7%,系统的测量误差值显著降低,精度改善趋势与仿真结果一致,表明多边法坐标测量系统中,适当增加测站数可以有效改善系统的测量精度。
Increasing the number of measurement stations is one of the potential means to improve the measurement accuracy of multilateral coordinate measurement system. In order to study the influence of the number of measurement stations on the coordinate measurement accuracy, the coordinate measurement system with different number combinations of measurement stations is established, and the relationship between the number of stations and the number of the required calibration moving points is derived. The simulation of the coordinate measurement system from 4 stations to 7 stations was carried out, the simulation experiment indicates that as the number of the measurement stations is increased from 4 to 7, the measurement accuracy is improved by 74.3%, 17.5% and 8.2%, respectively, the system mean measurement error gradually drops from 111.1 μm to 11.1 μm. The accuracy is improved obviously, and the accuracy improvement trend is gradually slow down. Then, the verification experiment of the coordinate measurement accuracy was carried out, the results show that as the number of measurement stations increases gradually, the measurement accuracy is improved by 83.9%, 11.4% and 4.7%, respectively. The measurement error of the system is significantly reduced and the trend of accuracy improvement is consistent with the simulation result, which indicates that in multilateral coordinate measurement system properly increasing the number of measurement stations can effectively improve the system measurement accuracy.
作者
缪东晶
孙威
李建双
姚燕
钟文
Miao Dongjing;Sun Wei;Li Jianshuang;Yao Yan;Zhong Wen(National Institute of Metrology,China,Beijing 100029,China;College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou 310018,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第7期38-44,共7页
Chinese Journal of Scientific Instrument
基金
国家重点研发计划(2017YFF0204802)项目资助
关键词
多边法
坐标测量
测站数量
测量精度
multilateral method
coordinate measurement
number of measurement stations
measurement accuracy
