Foreign-body detection in dry food using continuous sub-terahertz wave imaging
- Authors
- Ok, Gyeongsik; Kim, Hyun Jung; Chun, Hyang Sook; Choi, Sung-Wook
- Issue Date
- Aug-2014
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Foreign-body detection; Gaussian beam focusing; Millimeter-wave imaging; Raster-scan imaging; Sub-terahertz wave imaging
- Citation
- FOOD CONTROL, v.42, pp 284 - 289
- Pages
- 6
- Journal Title
- FOOD CONTROL
- Volume
- 42
- Start Page
- 284
- End Page
- 289
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/11943
- DOI
- 10.1016/j.foodcont.2014.02.021
- ISSN
- 0956-7135
1873-7129
- Abstract
- Recently, significant attention has been paid to the food safety issue of foreign-body detection in the food industry. Commercialized X-ray imaging is extensively used for monitoring any foreign bodies that may be embedded in food products. However, foreign bodies such as low-density organic materials cannot be easily observed by conventional detection methods. The sub-terahertz and terahertz wave methods can provide not only the identification of a low-density foreign body but also a safe inspection due to the non-ionizing radiation. In this study, foreign bodies concealed in dry food were detected with a high-resolution raster scan imaging system at 210 GHz in the sub-terahertz wave range. Our raster-scan imaging system using Gaussian beam focusing demonstrated the diffraction-limited spatial resolution in the sub-terahertz wave range. Transmission images of foreign bodies showed better contrast than reflection images. Nondense materials, such as insects and plastics, were observed with the continuous sub-terahertz wave, in contrast to the difficulty in observing them in X-ray transmission imaging. (C) 2014 Elsevier Ltd. All rights reserved.
- Files in This Item
-
- Appears in
Collections - Graduate School > ETC > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.