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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...
Airflow monitoring is an effective way to diagnose sleep disorders that are caused by complete or partial cessation of breathing during sleep. For monitoring airflow, a piezoelectric membrane sensor, consisting of a stainless steel foil, a piezoelectric ceramic film and a top electrode, has been developed using a sol-gel spray technique. This sensor has worked as a unimorph-type bending sensor, which...
In order to achieve net shape forming, processing of aluminum (Al) in the molten state is often necessary. However, few sensors and techniques have been reported in the literature due to difficulties associated with molten Al, such as high temperature, corrosiveness, and opaqueness. In this paper, development of ultrasonic techniques for imaging and measurements in molten Al using buffer rods operated...
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