Study on Measuring Error Caused by Movement of Benchmark for Auto Total Station in Health Monitoring

摘要：

Nowadays,auto total station is gradually applied in real-time health monitoring for large structures,due to its character of reliability and high precision etc.While in long-term deformation monitoring without guard,auto total station has to be fixed on unstable area,when large complicate structures or buildings around block light beam.In this instance,the benchmark which total station fixed on(called instrument base)may be moved with deformation of structure.This movement of benchmark will introduce measuring error.To address this problem,a mathematics model of error caused by movement of bench mark in threedimension is set up based on measuring principle of total station.Measuring error caused by movement of benchmark is analyzed.A compensation method to correct coordinate of measuring points is proposed after analyzing transfer principle of this error and establishing relationship between coordinate change of benchmark and the error.Furthermore,a corresponding survey method to improve measuring precision is introduced.At last,an experiment with a Leica TCA 1800 total station is carried out.The experiment results show that mathematics model of error is correct and the compensation method to improve precision is feasible,coordinates error of measuring points is less in 4mm.

关键词： health monitoring total station benchmark measuring error

作者: Lei Xiao-hua Chen Wei-min Zhang Peng Yue Ren-bin Xiong Xian-cai

作者单位: Key Lab for Optoelectronic Technology & System,Chongqing University,Chongqing,China College of Civil Engineering,Chongqing University,Chongqing,China

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）