Highly Accurate Pipe Length Measurement for Straight Pipes with Open Ends Using Stationary Waves
Highly Accurate Pipe Length Measurement for Straight Pipes with Open Ends Using Stationary Waves
复制标题
使用驻波对开口直管进行高精度管长测量
DOI：
10.9746/sicetr1965.38.821
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Okamoto
中科院分区：
文献类型：
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作者：
Shogo Tanaka;M. Okamoto
作者以前开发了一种管道长度测量系统，用于具有封闭端的直管，使用声学传感器。该系统利用管道中的驻波作为线性动态系统的状态变量，采用卡尔曼滤波和极大似然法，实现了管道长度的高精度在线测量。然而，实际上有许多应用需要对具有开口端的管道进行长度测量。为了测量这种管道的长度，必须考虑对开口端的补偿。然而，问题是补偿强烈地依赖于开口端周围的环境，更糟糕的是，补偿系数不是先验已知的。因此，本文提出了一种新的测量系统，精确测量管道的长度与一个或两个开口端，而不管周围的测量环境的开口端。实验结果表明，该系统实现了高精度的管道长度测量和开口补偿。
The authors previously developed a pipe length measurement system for straight pipes with closed ends using an acoustic sensor. The system realized a highly accurate on-line length measurement by making use of the stationary wave in the pipes as state variables of a linear dynamic system and also by using Kalman filters and maximum likelihood method. There are however practically lots of applications where length measurement is required for the pipes with open ends. In order to measure the length of such a pipe, a compensation for the open ends must be taken into account. The problem is however that the compensation strongly depends on the environment around the open ends and what is worse the compensation coefficient is not a priori known. The paper thus proposes a new measurement system which exactly measures the length of pipes with one or two open ends despite of the measurement environment around the open ends. Experiments will show that a highly accurate pipe length measurement is realized together with the open end compensations.