• Title/Summary/Keyword: Thermal Imaging Technology

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Performance Evaluation of Image Saturation of Thermal Imaging Camera for the Fire Service (화재용 열화상 카메라의 영상포화특성 평가)

  • Kim, Sung-Chan
    • Fire Science and Engineering
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    • v.26 no.2
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    • pp.69-74
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    • 2012
  • Thermal imaging technology based on IR sensor with high transmittance through the fire smoke is considered as one of the advanced technology for the fire service. The present study has been performed to investigate the image saturation characteristics with thermal condition of target and background and evaluate the performance of image quality based on the contrast transfer function (CTF). For the present testing conditions, TIC using BST sensor did not show the image saturation and the image quality based on the CTF was proportional to the temperature difference between target and background. This study can be utilized as preliminary study to improve reliability and technical development of TIC.

Design of Two Zoom Infrared Camels using Noise Uniformity Correction by Shutter Lens (셔터렌즈에 의한 검출기 불균일 보정을 적용한 이중배율 적외선 카메라 설계)

  • Ahn, Gyou-Bong;Kim, Seo-Hyun;Jung, Jae-Chul;Jo, Mun-Shin;Kim, Chang-Woo;Kim, Hyun-Sook
    • Korean Journal of Optics and Photonics
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    • v.18 no.2
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    • pp.135-141
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    • 2007
  • This paper describes the design technology for a third generation thermal imaging system, which is more compact than before, using a $320\times240$ mid-IR focal plane detector. The third generation non-scanning thermal imaging system was constructed as a compact thermal imaging module as a reconnaissance, surveillance and navigation sensor for helicopter and infantry vehicles in the $1980's\sim1990's$ and now, we designed a new compact infrared camera and studied a new type of non-uniformity correction lens fer this camera.

Growth of Graphene on Electro-polished Copper Foil by Thermal CVD

  • Jin, Xiaozhan;Kim, Sung-Jin;Seo, Eun-Kyoung;Boo, Doo-Wan;Lee, Jung-Ah;Hwang, Chan-Yong
    • Proceedings of the Korean Vacuum Society Conference
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    • 2012.08a
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    • pp.410-410
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    • 2012
  • The continuous monolayer graphene was synthesized on electro-polished copper foil. Electro-polishing sticks off the coating layer of copper foil, which prevents the continuous graphene growth. The quality of continuous graphene is dependent on roughness of copper foil. Copper foil roughness could be controlled by changing polishing condition. The effects of working voltage (4-6 V) and time (30-70 sec) for electro-polishing were systematically examined. The change of surface roughness was checked with AFM.

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Inspection of Calandria Reactor Surface of Wolsung Nuclear Power Plant using Thermal Infrared Camera mounted on the Mobile Robot KAEROT/m2

  • Cho, Jai-Wan
    • Proceedings of the KSRS Conference
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    • 2002.10a
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    • pp.578-578
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    • 2002
  • Thermal infrared imaging is a highly promising technology for condition monitoring and predictive maintenance of electronic, electrical and mechanical elements in nuclear power plants. However, conventional low-cost infrared imaging systems suffer from poor spatial resolution compared to commercial CCD cameras. This paper describes an approach to enhance inspection performances for calandria reactor area of Wolsung nuclear power plant through the technique of superimposing thermal infrared image into real CCD image. In the occurrence of thermal abnormalities on observation points and areas of calandria reactor area, unusual hot image taken from thermal infrared camera is mapped upon real CCD image. The performance of the technique has been evaluated in the experiment carried out at Wolsung nuclear power plant in the overhaul period. The results show that localizations of thermal abnormalities on calandria reactor face can be estimated accurately.

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Inspection of Calandria Reactor Area of Wolsung NPP using Thermal Infrared and CCD Images

  • Cho, Jai-Wan;Kim, Chang-Hoi;Seo, Yong-Chil;Park, Young-Soo;Kim, Seung-Ho
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.96.4-96
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    • 2002
  • Thermal infrared imaging is a highly promising technology for condition monitoring and predictive maintenance of electronic, electrical and mechanical elements in nuclear power plants. However, conventional low-cost infrared imaging systems suffer from poor spatial resolution compared to commercial CCD cameras. This paper describes an approach to enhance inspection performances for calandria reactor area of Wolsung nuclear power plant through the technique of superimposing thermal infrared image into real CCD image. In the occurrence of thermal abnormalities on observation points and areas of calandria reactor area, unusual hot image taken from thermal infrared camera is mapped upon re...

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Design and Manufacture of Ultra-Precision Al Flat Mirror Using Thermal Image Optics (열영상 광학계용 초정밀 Al 평면 미러의 설계 및 제작)

  • Kim, Dae-Jung;Choi, Cheol-Ho;Park, Yong-Pil;Gu, Hal-Bon;Kim, Shang-Suk;Kim, Joung-Ho
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.05b
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    • pp.136-139
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    • 2003
  • Thermal imaging system is electro-optical imaging device which can make visible the difference of infrared energy naturally emitted by objects. It is acquire the same images at any time of the day or night. There it has been readily available to the night observation such as fire control systems. In this study, we are manufacturing thermal image Al flat mirror. The surface roughness 3.539nm Ra and power 0.382 fringe(at 632.8nm), irregularity 0.835 fringe(at 632.8nm) for form waviness of thermal image Al flat mirror are very satisfied. The results will be reflected for development of the ultra precision application. And a brief review of Ultra-precision system in the field of Ultra-precision at Korea photonics technology institute (KOPTI) is present in this paper.

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Design of a deep learning model to determine fire occurrence in distribution switchboard using thermal imaging data (열화상 영상 데이터 기반 배전반 화재 발생 판별을 위한 딥러닝 모델 설계)

  • Dongjoon Park;Minyoung Kim
    • The Journal of the Convergence on Culture Technology
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    • v.9 no.5
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    • pp.737-745
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    • 2023
  • This paper discusses a study on developing an artificial intelligence model to detect incidents of fires in distribution switchboard using thermal images. The objective of the research is to preprocess collected thermal images into suitable data for object detection models and design a model capable of determining the occurrence of fires within distribution panels. The study utilizes thermal image data from AI-HUB's industrial complex for training. Two CNN-based deep learning object detection algorithms, namely Faster R-CNN and RetinaNet, are employed to construct models. The paper compares and analyzes these two models, ultimately proposing the optimal model for the task.

A Performance Evaluation of a Heat Dissipation Design for a Lithium-Ion Energy Storage System Using Infrared Thermal Imaging (적외선 열화상을 활용한 리튬 이온 ESS의 방열설계 성능평가에 관한 연구)

  • Kim, Eun-Ji;Lee, Gyung-Il;Kim, Jae-Yeol
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.19 no.5
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    • pp.105-110
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    • 2020
  • The global battery market is rapidly growing due to the development of vehicles(EV) and wireless electronic products. In particular logistics robots, which hielp to produce EVs, have attracted much interest in research in Korea Because logistics sites and factories operate continuously for 24 hours, the technology that can dramatically increase the operation time of the logistics equipment is rapidly developing, and various high-level technologies are required for the batteries used in. for example, logistics robots. These required technologies include those that enable rapid battery charging as well wireless charging to charge batteries while moving. The development of these technologies, however, result in increasing explosions and topical accidents involving rapid charging batteries These accidents due to the thermal shock caused by the heat generated during the charging of the battery cell. In this study, a performance evaluation of a heat dissipation design using infrared thermal imaging was performed on an energy storage systrm(Ess) applied with an internal heat conduction cooling method using a heating plate.

Development of the Ultra Precision Thermal Imaging Optical System (초정밀 열 영상 현미경 광학계 개발)

  • Yang, Sun-Choel;Won, Jong-Ho
    • Journal of the Korean Society for Precision Engineering
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    • v.27 no.12
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    • pp.15-21
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    • 2010
  • Recently, there is a demand for a thermal imaging microscope in the medical field as well as the semi-conductor industry Although the demand of the advanced thermal imaging microscope has been increased, it is very difficult to obtain the technology of developing a thermal camera, because it is used for defense industry. We developed the ${\times}5$ zoom microscope which has $3\;{\mu}m$ spatial resolution to research the design and fabrication of the IR (Infrared) optical system. The optical system of the IR microscope consists of four spherical lenses and four aspheric lenses. We verified individual sensitivity of each optical parameter as the first order approach to the analysis. And we also performed structure and vibration analysis. The optical elements are fabricated using Freeform 700A. The measurement results of surface roughness and form accuracy using NT 2000 and UA3P are Ra 2.36 nm and P-V $0.13\;{\mu}m$. Finally we ascertained resolution power of $3\;{\mu}m$ using USAF (United State Air Force) 1951 IR resolution test chart.

Studies on the millimeter-wave Passive Imaging System (밀리미터파 수동 이미징 시스템 연구)

  • Jung Min-Kyoo;Chae Yeon-Sik;Kim Soon-Koo;Koji Mizuno;Rhee Jin-Koo
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.5 s.347
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    • pp.182-188
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    • 2006
  • In this study, we have designed the millimeter-wave passive imaging system which records energy that is reflected or emitted from the source and produces image. The lens and front-end of receiver appeared to be important in the system to detect input thermal noise signal. The lens for signal focusing has been designed by optical transfer function. Amplifier of the imaging systemhas been set up with 40dB in maximum gain, 5 dB in maximum noise figure, and 10GHz in bandwidth to enhance sensitivity for thermal noise and to receive it in wide-band width as well. The SBD MSS-20 141B10D diode has been used for the detector circuit to convert amplified millimeter-wave signals to DC output.