caa a22 4500 445306033 CHVBK 20180317142613.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10762-010-9672-6 doi (NATIONALLICENCE)springer-10.1007/s10762-010-9672-6 Non-destructive Characterization of Soot in Exhaust Filters Using Millimeter-wave Imaging [Elektronische Daten] [Takayuki Shibuya, Tomotaka Suzuki, Koji Suizu, Kodo Kawase] It is necessary to monitor the distribution of the soot that accumulates in the soot removal filter of an internal combustion engine to design the highly efficient filtering structure and optimize the timing of the filter renewal. However, there is no non-destructive inspection technique at present. In this study, we describe a non-destructive inspection system that can monitor the distribution of soot that accumulates in the filter using combination of millimeter-to-terahertz wave imaging and computed tomography. The transmittance of the filter shows a strong dependence on the angle of incidence because of its two-dimensional periodical shape. We identified a frequency at which photonic band gaps did not occur, and measured the three-dimensional tomographic image of the filter in a non-destructive manner. Springer Science+Business Media, LLC, 2010 Terahertz wave nationallicence Millimeter wave nationallicence Non-destructive inspection nationallicence Computed tomography nationallicence Shibuya Takayuki Nagoya University, Furocho, 464-8603, Nagoya, Japan aut Suzuki Tomotaka Nagoya University, Furocho, 464-8603, Nagoya, Japan aut Suizu Koji Nagoya University, Furocho, 464-8603, Nagoya, Japan aut Kawase Kodo Nagoya University, Furocho, 464-8603, Nagoya, Japan aut Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/5(2011-05-01), 716-721 1866-6892 32:5<716 2011 32 10762 https://doi.org/10.1007/s10762-010-9672-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10762-010-9672-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shibuya Takayuki Nagoya University, Furocho, 464-8603, Nagoya, Japan aut NATIONALLICENCE 700 1- Suzuki Tomotaka Nagoya University, Furocho, 464-8603, Nagoya, Japan aut NATIONALLICENCE 700 1- Suizu Koji Nagoya University, Furocho, 464-8603, Nagoya, Japan aut NATIONALLICENCE 700 1- Kawase Kodo Nagoya University, Furocho, 464-8603, Nagoya, Japan aut NATIONALLICENCE 773 0- Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/5(2011-05-01), 716-721 1866-6892 32:5<716 2011 32 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer