• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2013.05a
• /
• pp.1075-1076
• /
• 2013

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2015.11a
• /
• pp.237-238
• /
• 2015

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 1999.05a
• /
• pp.107-108
• /
• 1999

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 1998.05a
• /
• pp.71-72
• /
• 1998

• Proceedings of the Korean Institute of Surface Engineering Conference
• /
• 2003.10a
• /
• pp.24-25
• /
• 2003

• Journal of Welding and Joining
• /
• v.21 no.7
• /
• pp.65-70
• /
• 2003

Thermal emissivity is generally affected by surface situation of material such as roughness. In this study, the effect of surface roughness on measuring thermal emissivity is experimented. And emissivity measurement method and equipment using hemisperical mirror is also reviewed. As the result of this research, thermal emissivity increased as long as increasing surface roughness. So, surface roughness is a essential check point when we measure the emissivity.

• Proceedings of the KSRS Conference
• /
• 2003.11a
• /
• pp.1457-1459
• /
• 2003

This study reports the surface temperature pattern of the Tokyo Metropolitan area using the ASTER surface temperature product. The product is an image processed by applying temperature-emissivity separation to atmospheric corrected infrared thermal radiance of the land surface, then converted to surface temperature by using Planck's function. Daytime and nighttime observation in a cold season and a warm season were used in this study. As a result, 1) contrast between urban and suburban, 2) extraction of heating area in urban, 3) measurement of cooling effect of green space were achieved.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 1990.04a
• /
• pp.171-185
• /
• 1990

In order to measure the shape deformation of seat surfaces, an indentation measurement mat was devised. The 50cm * 50 cm mat containing small polyethylene beads were made using two sheets of polyurethane film. The indentation measurement mat was shaped by vacuuming between the subject and the testing seat. This method showed less than 5mm of deformation measurement error. Deformation of CADILLAC and MAXIMA seats were compared to demonstrate usefulness of the new method.

• 제어로봇시스템학회:학술대회논문집
• /
• 2001.10a
• /
• pp.89.1-89
• /
• 2001

Measurement of complex surfaces without touching is desirable in several fields. This arises mainly for measurement of complex surfaces including those surfaces that deform during touch. Our research presented in this paper describes the use of a 3D digitizer for scanning 3D objects. The use of such a device, in addition to proper calibration, requires proper scaling in all three dimensions. We propose measurement techniques to measure various aspects of the surface circumference, area and volume. We also present experiments from using a 3D Minolta digitizer for measuring 3D human heads.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.32 no.2
• /
• pp.192-197
• /
• 2012

In this paper, a non-contact microwave technique was presented to detect the surface crack of the metals. An open-ended coaxial cable line was used as a sensor at 11 GHz, and the reflection coefficients were measured by scanning along the metal surface including artificial surface cracks. A parameter, the K value which was defined as the difference between maximum and minimum reflection coefficients, was measured and used to estimate the crack depth. A linear relationship between the K value and crack depth was found. This study showed that non-contact detection of the surface cracks of metals is possible using the open-ended coaxial line sensor at X-band.