Title :
Length measurement of curved pipes and branch pipes using stationary waves
Author_Institution :
Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Ube, Japan
Abstract :
The author previously proposed an on-line length measurement system for straight pipes using stationary waves which were generated in the pipes. The measurement system regarded several of the stationary waves as state variables of a linear dynamic system and realized an online high-accurate length measurement of the pipes. This paper presents length measurement systems for curved and branch pipes by extending the pre-proposed measurement system. Experimental results show that accurate pipe length measurement is realized with the methods
Keywords :
acoustic wave velocity measurement; length measurement; branch pipes length measurement; curved pipes length measurement; linear dynamic system; online length measurement system; state variables; stationary waves; Acoustic measurements; Acoustic noise; Acoustic sensors; Covariance matrix; Error analysis; Fluctuations; Frequency; Gaussian noise; Length measurement; Sampling methods;
Conference_Titel :
Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE
Conference_Location :
Nagoya
Print_ISBN :
0-7803-6456-2
DOI :
10.1109/IECON.2000.972365
