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http://dx.doi.org/10.5369/JSST.2013.22.1.49

Laser Based Temperature Measurement of Rotating Disk Using Thermocolor  

Na, Wonhwi (Department of Electrical and Computer Engineering, College of Information and Communication Engineering, Sungkyunkwan Unversity)
Yoo, JaeChern (Department of Electrical and Computer Engineering, College of Information and Communication Engineering, Sungkyunkwan Unversity)
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Abstract
In this paper, we proposed a laser-based non-contact temperature measuring method for high speed rotating polycarbonate (PC) disk using transparency change of thermocolor. The thermocolor has abilities to change color and transparency due to a change in temperature. The thermocolor is applied on one side of polyvinylidene fluoride (PVDF) membrane. The thermocolor applied membrane is attached to inside of reaction chamber in disk. An optical system consisted of a laser beam radiator and a laser photometer is installed. Laser is irradiated at the bottom side of disk and the transmitted laser beam is detected by the laser photometer at the opposite side of disk. During the disk is rotating, laser is irradiated and detected simultaneously. The laser photometer senses the transmitted laser power and generates voltage as output. The temperature of disk can be detected during the disk is rotating up to 3000 RPM.
Keywords
Laser; Thermocolor; Non-contact temperature measurement; Lab-On-a-Disk;
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