• Title, Summary, Keyword: Thermal Imaging Camera

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Small Camera Module for TEC-less Uncooled Thermal Image (TEC-less 비냉각 열영상 검출기용 소형카메라 모듈 개발)

  • Kim, Jong-Ho
    • IEMEK Journal of Embedded Systems and Applications
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    • v.12 no.2
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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.

Development of Fuzzy Inference-based Deterioration Diagnosis System Using Infrared Thermal Imaging Camera (적외선 열화상 카메라를 이용한 퍼지추론 기반 열화진단 시스템 개발)

  • Choi, Woo-Yong;Kim, Jong-Bum;Oh, Sung-Kwun;Kim, Young-Il
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.6
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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

Method for Measuring Weld Temperature Using an Infrared Thermal Imaging Camera (적외선 열화상 카메라를 이용한 용접부의 온도 측정 방법)

  • Ro, Chan-Seung;Kim, Kyeong-Suk;Chang, Ho-Seob
    • Journal of the Korean Society for Nondestructive Testing
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    • v.34 no.4
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    • pp.299-304
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    • 2014
  • In this paper, a method is tested to measure temperatures in high-temperature welds. Protective glass was installed between an infrared thermal imaging camera and a heat source, and temperature compensation was applied to the measuring instruments. When the temperature of halogen lamps was taken in real-time and measured by the thermal camera, the temperature was found to be almost invariant with the distance between the camera and heat source. The temperature range could be predicted, through correlations with the thickness of the protective glass and the measured distance. This study suggests that the temperature measurement of welds obtained by using an infrared thermal imaging camera is valid, through experimental testing of heat sources.

Responsivity and Noise Evaluation of Infrared Thermal Imaging Camera (적외선열화상카메라의 응답 및 노이즈 특성 평가)

  • Kim, Dong-Ik;Kim, Ghiseok;Kim, Geon-Hee;Chang, Ki Soo
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.4
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    • pp.342-348
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    • 2013
  • In this paper, the evaluation method for the responsivity and noise characteristics of an infrared thermal imaging camera was presented. Signal transfer function and noise equivalent temperature difference of the infrared thermal imaging camera were obtained by using a differential mode blackbody that is able to control the temperature difference ${\Delta}$T between an infrared target and its background. And we verified the suitability of our evaluation method through comparison between the found noise equivalent temperature difference and the specification of the camera. In addition, the difference of 0.01 K of the two noise equivalent temperature differences calculated from with and without nonuniformity correction suggests that the nonuniformity correction is essential process for the evaluation of the infrared thermal imaging camera.

Malfunction Detection of High Voltage Equipment Using Microphone Array and Infrared Thermal Imaging Camera (Microphone Array와 열화상 카메라를 이용한 고압설비 고장검출)

  • Han, Sun-Sin;Choi, Jae-Young;Lee, Jang-Myung
    • Journal of Institute of Control, Robotics and Systems
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    • v.16 no.1
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    • pp.25-32
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    • 2010
  • The paper proposes a hierarchical fault detection method for the high voltage equipment using a microphone array which detects the location of fault and the thermal imaging and CCD cameras which verifies the fault and stores the image, respectively. There are partial arc discharges on the faulty insulators, which generates a specific pattern of sound. Detecting the signal using the microphone array, the location of the faulty insulator can be estimated. The 6th band-pass filter was applied to remove noise signal from wind or external influence. When the mobile robot carries the thermal and CCD cameras to the possible place of the fault insulator, the fault insulators or power transmission wires can be detected by the thermal images, which are caused by the aging or natural erosion. Finally, the CCD camera captures the image of the fault insulator for the record. The detection scheme of fault location using the microphone array and the thermal images have been proved to be effective through the real experiments. As a result of this research, it becomes possible to use a mobile robot with the integrated sensors to detect the fault insulators instead of a human being.

Using a Thermal Imaging Camera to Locate Perforators on the Lower Limb

  • Paul, Sharad P.
    • Archives of Plastic Surgery
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    • v.44 no.3
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    • pp.243-247
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    • 2017
  • Reconstruction of the lower limb presents a complex problem after skin cancer surgery, as proximity of skin and bone present vascular and technical challenges. Studies on vascular anatomy have confirmed that the vascular plane on the lower limb lies deep to the deep fascia. Yet, many flaps are routinely raised superficial to this plane and therefore flap failure rates in the lower limb are high. Fascio-cutaneous flaps based on perforators offer a better cosmetic alternative to skin grafts. In this paper, we detail use of a thermal imaging camera to identify perforator 'compartments' that can help in designing such flaps.

A Basic Study to Reveal the Relationships between Solar Thermal Radiation and Thermographic Images (태양 복사와 열화상이미지의 관계에 대한 기초 연구)

  • Kim, Jeongbae
    • Journal of Institute of Convergence Technology
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    • v.10 no.1
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    • pp.13-17
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    • 2020
  • Among the factors that must be taken into account when using thermal imaging cameras that are expanding their application to various fields, a basic study was conducted focusing on temperature on the effect of solar radiation on the photographed thermal image. Through all experiments, in order to use an image taken with a thermal imaging camera for an object installed or located outdoors, a separate temperature correction according to the size of solar radiation or a separate device to block the effect of solar radiation must be additionally installed. Since the temperature of the same object may vary in the thermal image taken indoors or outdoors, it is necessary to calibrate it through comparison with other temperatures as a reference point. In the case of measuring the temperature of a glossy surface such as metal indoors with a thermal imaging camera, it was confirmed that an environment that can remove the light reflection effect by the glossy surface must be constructed and photographed.

Visualization of Temperature Distribution Deep Inside the Agar Gel Tissue Phantom Heated Using Moxibustion and 1064 nm Infrared Laser (쑥뜸과 1064 nm 파장의 근적외선 레이저로 가열된 아가젤 조직 팬텀 심부의 온도분포 가시화)

  • Cho, Ji-Yong;Kim, Jung-Kyung
    • Journal of the Korean Society of Visualization
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    • v.8 no.4
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    • pp.54-59
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    • 2010
  • A laser moxibustion therapy device having effect similar to that of traditional moxibustion is being developed using 1064 nm infrared laser. The therapy device allows direct interaction of laser light with the tissue rendering temperature distribution both on the skin surface and deep under the skin. We made a device that could measure temperature of deep under the surface of agar gel tissue phantom using thermocouples. A thermal imaging camera was used to verify results from the temperature measurement device. We compared the characteristics of heat transfer inside the tissue phantom during moxibustion and laser irradiation. The temperature distribution measured by thermocouples was found to be similar to that of distribution given by thermal imaging camera.

Thermal Infrared Image Analysis for Breast Cancer Detection

  • Min, Sedong;Heo, Jiyoung;Kong, Youngsun;Nam, Yunyoung;Ley, Preap;Jung, Bong-Keun;Oh, Dongik;Shin, Wonhan
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.2
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    • pp.1134-1147
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    • 2017
  • With the rise in popularity of photographic and video cameras, an increasing number of fields are now using thermal imaging cameras. One such application is in the diagnosis of breast cancer, as thermal imaging provides a low-cost and noninvasive method. Thermal imaging is particularly safe for pregnant women, and those with large, dense, or sensitive breasts. In addition, excessive doses of radiation, which may be used in traditional methods of breast cancer detection, can increase the risk of cancer. This paper presents one method of breast cancer detection. Breast images were taken using a thermal camera, with preliminary experiments conducted on Cambodian women. Then the experimental results were analyzed and compared using Shannon entropy and logistic regression.

Design and Implementation of the Smart Fire Detection System and Automatic Extinguish Device Interface Platform based on Thermal Imaging Camera (적외선 열 영상 카메라 기반의 스마트 화재감지 시스템 및 자동소화 장치 인터페이스 플랫폼의 설계 및 구현)

  • Chang, Rak-Ju;Lee, Soon-Yi;Kang, Suk-Won;Lee, Dong Myung
    • Proceedings of the Korea Contents Association Conference
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    • pp.7-8
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    • 2014
  • The smart fire detection and automatic extinguish device interface platform based on thermal imaging camera that early monitors fire is designed and implemented in this paper. If a fire occurs in some area, the developed system can detect and automatically extinguish the fire. The major functions for developing the system are: Image system and Viewer for fire detection based on Thermal imaging camera and Megapixel camera; Automatic extinuish device for early fir detection; Interface platform between monitoring systems and automatic extinguish device.

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