• Title/Summary/Keyword: Thermal Imaging

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The Method of medical Infrared Thermographic imaging using an Infrared LED Lamps (적외선 LED 램프를 이용한 적외선 체열 영상 진단)

  • Song, M.J.;Ryu, S.M.;Soo, B.M.;Kim, J.S.;Choi, W.S.;Park, C.B.;Kim, T.W.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.06a
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    • pp.282-282
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    • 2010
  • LED Device was designed of electronic circuits of electrical power part for used Pspice student version and used Infrared LED lamps of load part. LED was used Computerized Electronic Medical Infrared Thermographic Imaging System for body surface Investigation of variable Body thermal asymmetry. It was knowledge body thermal Asymmetry of body surface and quantity body surface of electromagnetic wave to inflow electrical power part.

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A Serial-Parallel Scanner Optics for Thermal Imaging System (열상장비용 직병렬주사광학계)

  • 김창우;김현숙;홍석민;김재기
    • Korean Journal of Optics and Photonics
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    • v.5 no.2
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    • pp.212-216
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    • 1994
  • We have designed and constructed a scanner optics for thermal imaging system operating in 8 - 12 /lfll band. The scanner consists of rotating polygon and oscillating mirror for serial-parallel scan using 5 elements SPRITE HgCdTe. A spherical mirror is used for scan relay mirror to minimize size of the scan mirrors and pupil aberration. The scanner has $40^{\circ}\times26.67^{\circ}$ wide scan field of view and the calculated diffraction MTF shows diffraction limited performance. As a result we have obtained high resolution thermal image. image.

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Enhancement Algorithm of Panoramic Thermal Imaging Warning System for Small Target Detection (소형 표적 탐지를 위한 파노라믹 적외선 영상 개선 알고리즘)

  • Kim, Gi-Hong;Jeon, Byeong-Gyun;Kim, Ju-Yeong;Kim, Deok-Gyu
    • Proceedings of the KIEE Conference
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    • 2003.11c
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    • pp.400-403
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    • 2003
  • This paper presents the signal processing of the panoramic thermal warning system that detects the small target such as aircraft and helicopter from afar. We develope the all round looking thermal imaging system which can scan all the way. This system acquires the panoramic images to reconstruct the IR images by revolving head of sensor typed line sensor at high speed. For detection, where the object of interest may be small, it is sometimes difficult to specify from object and background by conventional contrast enhancement methods. Therefore we use the adaptive plateau equalization algorithm each region to improve the contrast and make the hardware system which consists of the signal processing board for real-time display. We can verify the proposed method by the computer simulation and the hardware implementation.

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VISUALIZATION OF INTERNAL DEFECTS IN PLATE-TYPE NUCLEAR FUEL BY USING NONCONTACT OPTICAL INTERFEROMETRY

  • Park, Seung-Kyu;Park, Nak-Gyu;Baik, Sung-Hoon;Kang, Young-June
    • Nuclear Engineering and Technology
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    • v.45 no.3
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    • pp.361-366
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    • 2013
  • An imaging technique to visualize the internal defects in a plate-type nuclear fuel specimen was developed by using an active optical interferometer for a nondestructive quality inspection. A periodic thermal wave having a sinusoidal intensity pattern induced a periodical strain variation for the specimen. The varying strain image was acquired using an optical laser interferometer. The strain distribution over the internal defects will be distorted in an acquired strain image because a part of the thermal wave will be reflected from these defects during propagation. In this paper, internal defects were efficiently visualized by sequentially accumulating the extracted defect components. The experimental results confirmed that the developed visualization system can be a valuable tool to detect the internal defects in plate-type nuclear fuel.

Compatibility Evaluation between NCM-CV Cast Iron Brake Disk and Various Pads (NCM-CV 주철 제동디스크와 다양한 패드의 적합성 평가)

  • Gil, Hyeong-Gyeun;Ko, Tae-Whan;Cho, Dong-Hyun;Han, Seong-Ho;Seo, Sung-Il
    • Journal of the Korean Society for Railway
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    • v.10 no.3 s.40
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    • pp.251-256
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    • 2007
  • The research analyzed dynamo test results to evaluate compatibility between brake disk made of NCM-CV cast iron and various pads. The dynamo test was executed with one kind of resin pad and three kinds of sintered pads suitable for 200 km/h trains according to a program which refers to UIC 541-3. The thermocouples were established in specific location in order to measure the temperature of disk and pads. In addition, the thermal imaging camera was used for capturing the instantaneous thermal characteristic of disk. The research results may be utilized to use as basis data of pad development for NCM-CV brake disk hereafter.

Comparison of Land Surface Temperatures from Near-surface Measurement and Satellite-based Product

  • Ryu, Jae-Hyun;Jeong, Hoejeong;Choi, Seonwoong;Lee, Yang-Won;Cho, Jaeil
    • Korean Journal of Remote Sensing
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    • v.35 no.4
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    • pp.609-616
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    • 2019
  • Land surface temperature ($T_s$) is a critical variable for understanding the surface energy exchange between land and atmosphere. Using the data measured from micrometeorological flux towers, three types of $T_s$, obtained using a thermal-infrared radiometer (IRT), a net radiometer, and an equation for sensible heat flux, were compared. The $T_s$ estimated using the net radiometer was highly correlated with the $T_s$ obtained from the IRT. Both values acceptably fit the $T_s$ from the Terra/MODIS (Moderate Resolution Imaging Spectroradiometer)satellite. These results will enhance the measurement of land surface temperatures at various scales. Further, they are useful for understanding land surface energy partitioning to evaluate and develop land surface models and algorithms for satellite remote sensing products associated with surface thermal conditions.

Pseudo-RGB-based Place Recognition through Thermal-to-RGB Image Translation (열화상 영상의 Image Translation을 통한 Pseudo-RGB 기반 장소 인식 시스템)

  • Seunghyeon Lee;Taejoo Kim;Yukyung Choi
    • The Journal of Korea Robotics Society
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    • v.18 no.1
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    • pp.48-52
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    • 2023
  • Many studies have been conducted to ensure that Visual Place Recognition is reliable in various environments, including edge cases. However, existing approaches use visible imaging sensors, RGB cameras, which are greatly influenced by illumination changes, as is widely known. Thus, in this paper, we use an invisible imaging sensor, a long wave length infrared camera (LWIR) instead of RGB, that is shown to be more reliable in low-light and highly noisy conditions. In addition, although the camera sensor used to solve this problem is an LWIR camera, but since the thermal image is converted into RGB image the proposed method is highly compatible with existing algorithms and databases. We demonstrate that the proposed method outperforms the baseline method by about 0.19 for recall performance.

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.

Study on Methodology of Trade-Off for Space-borne FPA Thermal Design by Simplified Thermal Node Analysis (단순화 된 열 저항 해석을 이용한 우주용 FPA 열제어 설계 방안 연구)

  • Chang, Jin-Soo;Yang, Seung-Uk;Kim, Jong-Un;Kim, Ee-Eul
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.43 no.2
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    • pp.179-185
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    • 2015
  • The main objective of thermal design for a space-borne FPA(Focal Plane Assembly) is to provide stable thermal environment during imaging operation and thus maintain the image quality. An FPA must be maintained within its operating temperature range and cooled down to its initial temperature soon enough for the next imaging operation. This paper describes the study result on performing trade-off studies for FPA thermal design by using simplified thermal node analysis about FPA preliminary design. It also describes the verification results of the study by comparing thermal analysis results and trade-off study results. According to results, we can conclude that this approach is useful for simple and quick trade-off studies without thermal analysis based on thermal math models.

Advances in High TG Hole Transporters

  • Gelsen, Olaf;Lischewski, V.;Leonhardt, J.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2006.08a
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    • pp.355-356
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    • 2006
  • The glass transition behavior of OLED materials is very important for both processing and lifetime. We report about the correlation between the structure of selected small molecule Hole Transport Materials (HTM's) and their glass transition temperature. The thermal stability of devices manufactured with them was investigated. The results give researchers and engineers some information which are helpful for designing new molecules and processing them in device making.

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