Uncertainty in tacheometric measurement of convergences in tunnels
Uncertainty in tacheometric measurement of convergences in tunnels
复制标题
隧道收敛速度测量的不确定性
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Casaca
中科院分区：
文献类型：
--
作者：
M. Henriques;J. Casaca
隧道断面上物点之间的距离沿着时间的变化（收敛）可用于真实的连续隧道监测系统中，作为决策工具，以激活报警或警报信号。电子测速仪，特别是电动测速仪，经常被用来测量曲率。为了量化警报和警报的级别，应该考虑收敛测量不确定性。本文利用方差传播的一般公式，将收敛的不确定度作为仪器不确定度参数的函数进行建模。将该模型应用于模拟隧道，分析了带有自动目标识别（ATR）系统的机动测速仪的特殊情况。
The variations, along time, of the distances betwee n object points on tunnel cross-sections (convergences) may be used in real time conti nuous tunnel monitoring systems, as decision tools, to activate signals of alert or ala rm. Electronic tacheometers, especially the motorized ones, are frequently used to measure conv ergences. To quantify the levels of alert and alarm one should take into account the converge nce measurement uncertainty. The paper deals with modelling the uncertainty of the converg ence as a function of the instrumental uncertainty parameters, using the general formula f or the propagation of variances. The model is applied to a simulated tunnel, where the special ase of motorized tacheometers with automatic target recognition (ATR) systems is analy sed.