Title :
Noncontact temperature profiling of rotating cylinder by laser-ultrasonic sensing
Author :
Ihara, Ikuo ; Matsuya, Iwao ; Kosugi, A. ; Ono, Yuto
Author_Institution :
Dept. of Mech. Eng., Nagaoka Univ. of Technol., Nagaoka, Japan
Abstract :
There are growing demands for measuring surface and internal temperature profiles of rotating objects in the fields of engineering and manufacturing industries. In this work, a new noncontact method for measuring such temperature profiles of a heated rotating cylinder is presented. A laser-ultrasonic technique which provides noncontact ultrasonic measurements of heated objects is employed in the method. Surface temperature measurements for a heated cylinder using the laser-ultrasonic technique and a heat conduction analyses with a finite difference calculation are combined together for making a quantitative evaluation of the internal temperature profile in the radial direction of the cylinder. To demonstrate the feasibility of the combined method, an experiment with a heated steel cylinder (100 mm dia.) rotating at 300 min-1 is carried out. A pulsed laser generator and a laser Doppler vibrometer are used for generating and detecting surface acoustic waves (SAWs) on the steel cylinder, respectively. Measured SAWs are used for determining both surface and internal temperatures of the cylinder. As a result, the estimated temperature distributions during heating almost agree with those measured by an infrared radiation camera. In addition, the influence of the rotating speed of the cylinder on the error in ultrasonically estimated surface temperatures is examined.
Keywords :
finite difference methods; heat conduction; infrared detectors; measurement by laser beam; measurement errors; steel; surface acoustic wave sensors; temperature distribution; temperature measurement; ultrasonic devices; ultrasonic measurement; vibration measurement; SAW; engineering industry; finite difference calculation; heat conduction analyses; heated cylinder; infrared radiation camera; laser Doppler vibrometer; laser ultrasonic sensor; manufacturing industry; measurement error; noncontact temperature profile; noncontact ultrasonic measurement; pulsed laser generator; rotating cylinder; rotating objects; steel cylinder; surface acoustic waves; surface temperature measurement; temperature distribution estimation; ultrasonic estimation; Heating; Surface acoustic waves; Temperature distribution; Temperature measurement; Temperature sensors; Ultrasonic variables measurement; Laser-ultrasound; Noncontact monitoring; Rotating cylinder; Temperature profile; Ultrasonic thermometry;
Conference_Titel :
Sensing Technology (ICST), 2013 Seventh International Conference on
Conference_Location :
Wellington
Print_ISBN :
978-1-4673-5220-8
DOI :
10.1109/ICSensT.2013.6727650