• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1113-1116
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• 2004

This paper presents the method for analyzing surface temperature of Electric incoming Apparatus. For the experiment, the surface temperature of electric power apparatus was measured and analyzed by using a infrared thermal imaging system. Surface Discharges(SD) have very complex characteristics of discharge patterns, therefore it requires the development of precise analysis methods. recently, studies on infrared thermal imaging system are carried out to analyze temperature distribution of power equipments through condition diagnosis and to diagnose the degradation of power equipments. The changes in suface temperature was measured by using the infrared thermal imaging system under hot line condition. The system was set up based on the diagnostic method of the electric incoming apparatus.

• 제어로봇시스템학회논문지
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• 제6권5호
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• pp.396-403
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• 2000

A thermal imaging system is implemented for the measurement and the analysis of the thermal distribution of the target objects. The main part of the system is a thermal camera in which a focal plane array typed sensor is introduced. The sensor detects the mid-range infrared spectrum of target objects and then it outputs a generic video signal which should be processed to form a frame thermal image. Here, a digital signal processor(DSP) is applied for the high speed processing of the sensor signals. The DSP controls analog-to-digital converter, performs correction algorithms and outputs the frame thermal data to frame buffers. With the frame buffers can be generated a NTSC signal and transferred the frame data to personal computer(PC) for the analysis and a monitoring of the thermal scenes. By performing the signal processing functions in the DSP the overall system achieves a simple configuration. Several experimental results indicate the performance of the overall system.

• 대한임베디드공학회논문지
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• 제12권2호
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• pp.97-103
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• 2017

Thermal imaging is mainly used in military equipment required for night observation. In particular, technologies of uncooled thermal imaging detectors are being developed as applied to low-cost night observation system. Many system integrators require different specifications of the uncooled thermal imaging camera but their development time is short. In this approach, EOSYSTEM has developed a small size, TEC-less uncooled thermal imaging camera module with $32{\times}32mm$ size and low power consumption. Both domestic detector and import detector are applied to the EOSYSTEM's thermal imaging camera module. The camera module contains efficient infrared image processing algorithms including : Temperature compensation non-uniformity correction, Bad/Dead pixel replacement, Column noise removal, Contrast/Edge enhancement algorithms providing stable and low residual non-uniformity infrared image.

• 동의생리병리학회지
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• 제28권1호
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• pp.89-93
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• 2014

The aim of this study was to investigate that thermal imaging is objective and effective to evaluate the severity of Bell's palsy. We investigated 19 cases of patients in college of Oriental Medicine, Iksan Oriental medical hospital at Wonkwang university who were diagnosed with Bell's palsy. The degree of palsy was evaluated with House-Brackmann grading system(HBGS) before treatment, then the thermal difference of the face was calculated by thermal imaging, and finally the correlation between HBGS and thermal difference was analyzed. The significance correlation was found between HBGS and thermal imaging's thermal difference. According to the images taken from 17 patients' DITI's temperature value and HBGS's palsy grade, they significantly were correlated. As thermal imaging's thermal differences got larger in number, the palsy grade had increased. These results suggest that thermal imaging identified to be a relatively objective examination method for evaluating the severity of Bell's palsy.

• 한국광학회지
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• 제12권4호
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• pp.281-288
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• 2001

본 연구에서는 넓은 운용온도에서 열영상 장비의 광학성능을 유지하도록 하기 위한 비열화 분석 및 시험을 수행하였다. 비열화 분석은 광학계 설계를 위한 컴퓨터 프로그램인 Code-V와 SIGMA2100으로 수행하였으며 비열화 시험은 열영상 장비와 콜리메이터를 온도챔버에 함께 넣어 온도에 따른 영상을 녹화하였다. 2차원배열 검출기를 사용한 20:1 줌 열영상 장비를 가지고 비열화 시뮬레이션을 수행하였으며 그 결과를 이용하여 줌궤적을 보상하였다. 비열화 시험을 통하여 온도변화에 따라 줌궤적어 적절히 작동되어 $-32^{\circ}C-+50^{\circ}C$의 온도범위 내에서 만족할 만한 광학성능이 유지되는 것을 확인하였다.

• 전자공학회논문지SC
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• 제49권1호
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• pp.80-87
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• 2012

본 논문에서는 열상장비의 광 검출기에서 검출된 미약한 전기적 신호를 영상신호처리를 하기 위한 신호로 증폭을 해 주는 전단 증폭부의 성능 검사용 ATE(Automatic Test Equipment)를 개발하였다. 기존 ATE 장비는 주로 반도체 소자 양품검사 분야에서 활발히 개발되고 있었으나 최근에는 장비의 성능검사 분야에서도 연구되고 있다. 그러나 열상장비 성능검사 분야의 ATE 에 대한 연구는 다른 분야에 비해 미진하여 우리군의 핵심적인 감시 장비인 열상장비는 정비가 제한되었다. 이에 따라 본 논문에서는 새로운 열상장비 분야의 ATE 연구가 필요하여 전단증폭부 및 열상장비의 다른 회로카드의 범용적인 개발이 가능하도록 Matrix Relay를 개발하였다. 개발된 ATE로 전단증폭부의 증폭도를 측정한 결과 증폭 전압은 평균 2.71 Vpp로써 이론적인 분석 범위 내에 있음이 확인되어 개발된 ATE가 우수한 성능임이 검증되었다.

• 한국컴퓨터정보학회논문지
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• 제17권12호
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• pp.41-47
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• 2012

모든 물체는 절대온도 0도 이상에서 복사에너지를 방출한다. 비냉각 열상시스템은 입사된 복사에너지를 검출하여 신호처리를 통해 영상으로 출력하는 장비이다. 최근에는 비냉각 열상장비를 활용하여 의료, 산업, 및 군수 등의 다양한 분야에 응용 되고 있으며, 다양한 응용분야에 대한 많은 연구가 진행되고 있다. 본 논문에서는 비냉각 열상시스템 검출기 내부에 열전소자가 없는 검출기를 보다 효과적으로 제어하여 영상의 화질을 향상시키고 이를 기반으로 온도 측정 정밀도를 극대화 할 수있는 효율적인 제어기법에 대해 설명한다. 제안하는 기법은 비냉각 열상시스템에 TEC-less 및 온도 검출 알고리듬을 적용하는 것이다. 실제 챔버를 활용하여 시험을 수행한 결과 알고리듬 적용 전 시스템보다 우수한 화질의 영상을 획득하고 온도 측정 정밀도가 $1^{\circ}C$이하로 향상됨을 확인할 수 있었다.

• 전기학회논문지
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• 제64권6호
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• pp.912-921
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• 2015

In this paper, we introduce fuzzy inference-based real-time deterioration diagnosis system with the aid of infrared thermal imaging camera. In the proposed system, the infrared thermal imaging camera monitors diagnostic field in real time and then checks state of deterioration at the same time. Temperature and variation of temperature obtained from the infrared thermal imaging camera variation are used as input variables. In addition to perform more efficient diagnosis, fuzzy inference algorithm is applied to the proposed system, and fuzzy rule is defined by If-then form and is expressed as lookup-table. While triangular membership function is used to estimate fuzzy set of input variables, that of output variable has singleton membership function. At last, state of deterioration in the present is determined based on output obtained through defuzzification. Experimental data acquired from deterioration generator and electric machinery are used in order to evaluate performance of the proposed system. And simulator is realized in order to confirm real-time state of diagnostic field

• 대한의용생체공학회:의공학회지
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• 제16권1호
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• pp.43-48
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• 1995

A high speed optic scanner capable of 16 frames/sec imaging has been developed for the realization of the infrared thermal Imaging system with a single element infrared sensor. The high speed optic scanner is composed of a rotating polygon mirror for horizontal scanning, a flat mirror mounted on a galvanometer for vertical scanning, and a spherical mirror. It has been experimentally found that the optic scanner is capable of 16 framesllsec imaging with the frame matrix size of 256 x 64.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.1255-1259
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• 1992

All matter above absolute zero emits thermal energy. Thermal imaging system converts the infrared radiation of a scene into a live picture of that scene : the thermal image is a pictorial representation of temperature differences. This paper has outlined the principles of thermal imaging and has briefly reviewed the history, and the present day and future technology.