• Title/Summary/Keyword: thermal infrared

검색결과 1,312건 처리시간 0.039초

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

  • 조지용;김중경
    • 한국가시화정보학회지
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    • 제8권4호
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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.

Measurement of temperature profile using the infrared thermal camera in turbulent stratified liquid flow for estimation of condensation heat transfer coefficients

  • Choi, Sung-Won;No, Hee-Cheon
    • 한국원자력학회:학술대회논문집
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    • 한국원자력학회 1999년도 춘계학술발표회요약집
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    • pp.107-107
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    • 1999
  • Direct-contact condensation experiments of atmospheric steam and steam/air mixture on subcooled water flowing co-currently in a rectangular channel are carried out uszng an infrared thermal camera system to develop a temperature measurement method. The inframetrics Model 760 Infrared Thermal Imaging Radiometer is used for the measurement of the temperature field of the water film for various flow conditions. The local heat transfer coefficient is calculated using the bulk temperature gradient along the (low direction. It is also found that the temperature profiles can be used to understand the interfacial condensation heat transfer characteristics according to the flow conditions such as noncondensable gas effects, inclination effect, and flow rates.

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Cordierite계 적외선 방사체의 제 특성에 미치는 $MnO_2$의 영향 (Effects of $MnO_2$ additives on the thermal properties of infrared radiator of Cordierite system)

  • 강이국;신용덕
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 C
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    • pp.1317-1319
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    • 1994
  • The thermal properties of Cordierite$(2MgO.2Al_2O_3.5SiO_2)$ + 30 [wt%]clay + X[wt%]MnO_2$ of infrared radiator have been investigated as a function of $MnO_2$ additives (X=0, 0.1, 0.25, 0.5, 1.0, 1.5, 2.0, 2.5). The thermal expansion coefficient was decreased and the spectral emissivity was increased only in the below $4.5{\mu}m$ wavelength with increasing amaunts(wt%) of $MnO_2$ additives. Also, the infrared radiator of Cordierite system which spectral emissivity was approximately 1.0 can be attainable at from $4.5{\mu}m$ to $8{\mu}m$ wavelength. The spectral emissivity was decreased from $8{\mu}m$ to $14{\mu}m$ at X=2.5.

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적외선열화상카메라를 이용한 건식벽체에 부착된 타일에 대한 시공상태 점검기준 (Inspection Method Standardization on Conditions Following Attached Tiles on Drywalls Using Infrared Thermal Camera)

  • 한윤정;마승재;최성민;오상근
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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    • pp.144-145
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    • 2015
  • In this study, it is contemporaneously understood that tile attachment on CRC board do not have a regulated standard on quality control and construction. Furthermore, there is also a definite lack of standardization on nondestructive inspection of tiles. This thesis investigates a diagnosis method of spot bonding tile attachment using infrared thermal camera as a way to propose a systematic nondestructive inspection method after tile construction.

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공작기계 스핀들 부위의 열분포 분석 및 오차 보정 (Analysis of Thermal Distribution and Compensation of Error for Spindle of Machining Center)

  • 고한서;박광희;서형렬;하종수
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 춘계학술대회
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    • pp.1352-1357
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    • 2004
  • Thermal error compensation has been developed for CNC (Computer Numerical Control) machining center with moving heat sources. The thermal error in CNC machining center has an effect on machining accuracy more than the geometric error does. Thus, temperature distributions of a spindle unit have been analyzed numerically by a Finite Differential Method and experimentally by an infrared (IR) camera in this study. A multiple variable method has been derived to estimate the thermal deformation of the machine origin stably and effectively after measuring deformation and temperature data. The experimental results for a vertical machining center have shown that the thermal errors of the machine origins were reduced more than 30% by the developed method.

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적외선 영상 처리를 통한 Formalin Test 통증 모델에서의 염전 침자극 효과에 대한 연구 (A Study of Analgesic Effect of Twirling Acupuncture on Pain Model of the Formalin Test Using the Infrared Thermal Image Processing)

  • 류재관;이순걸;임성수;이재동;민병일;류운영
    • Journal of Acupuncture Research
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    • 제21권2호
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    • pp.223-233
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    • 2004
  • Objective: As a manual accupucture method, the twirling-needle treatment has been known more effective in relieving pain than the conventional simple accupuncture treatment. Finding a proper treatment condition is difficult because of the lack of a quantative measurement of the alleviation of pain made by acupuncture. In this research, the authors propose the use of infrared thermal images in a formalin test to quantatively verify the effect of twirling. Methods: After injecting 10%~20% formalin into the tail of rats, the infrared thermal images(ITI) have been obtained to estimate the thermal distribution caused by inflammation. The authors propose a processing method to measure the thermal distribution from the thermal images obtained from the infrared camera as a pain model of the formalin test. Results: The pain model obtained from the infrared thermal image has two phases. The first phase, which is a transient period, is the initial 20 minutes when the pain is developed after the formalin injection. The second phase, which is a steady state, is where the development of pain lasts for 60 minutes or more after the first stage. This characteristic of the proposed model based on ITI is consistent with that of the pain model reported by other researchers whose works are based on the time-course of flinching and licking/biting, following a different concentration of formalin. It is noticed that the response of the thermal distribution obtained from ITI shows very high correlation to the behavioral response in the formalin test performed by Kazuhiro Okuda and four others5). In addition, the authors propose an ITI method to determine the pain-reducing effect of the acupuncture. The thermal distribution obtained from the experiment shows that there is significant pain reducing effect made by the twirling-needle method.

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표면 마이크로 가공기술을 이용한 비냉각 초전형 적외선 검출소자 제작 (Fabrication of Uncooled Pyroelectric Infrared Detector using Surface M Micromachining Technology)

  • 장철영;고성용;이석헌;김동진;김진섭;이재신;이정희;한석룡;이용현
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2000년도 하계종합학술대회 논문집(2)
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    • pp.115-118
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    • 2000
  • Uncooled pyroelectric infrared detectors based on BST(B $a_{-x}$S $r_{x}$Ti $O_3$) thin films have been fabricated by RF magnetron sputtering and surface Micromachining technology. The detectors form BST thin film ferroelectric capacitors grown by RF magnetron sputtering on N/O/N(S $i_3$ $N_4$/ $SiO_2$/S $i_3$ $N_4$) membrane. The sputtered BST thin film exhibits highly c-axis oriented crystal structure that no poling treatment for sensing applications is required. This is an essential factor to increase the yield for realization of an infrared image sensor. surface-Micromachining technology is used to lower the thermal mass of the detector by giving maximum sensor efficiency Gold-black is evaporated on top of the sensing elements used the thermal evaporator. fabricated uncooled pyroelectric infrared detectors is highly output voltage at the low temperature(1$^{\circ}C$).).).

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Thermal denaturation analysis of protein

  • Miyazawa, Mitsuhiro
    • 한국근적외분광분석학회:학술대회논문집
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    • 한국근적외분광분석학회 2001년도 NIR-2001
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    • pp.1628-1628
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    • 2001
  • Near infrared (NIR) spectroscopy is a powerful technique for non-destructive analysis that can be obtained in a wide range of environments. Recently, NIR measurements have been utilized as probe for quantitative analysis in agricultural, industrial, and medical sciences. In addition, it is also possible to make practical application on NIR for molecular structural analysis. In this work, Fourier transform near infrared (FT-NIR) measurements were carried out to utilize extensively in the relative amounts of different secondary structures were employed, such as Iysozyme, concanavalin A, silk fibroin and so on. Several broad NIR bands due to the protein absorption were observed between 4000 and $5000\;^{-1}$. In order to obtain more structural information from these featureless bands, second derivative and Fourier-self-deconvolution procedures were performed. Significant band separation was observed near the feature at $4610\;^{-1}$ ,. Particularly the peak intensity at $4525\;^{-1}$ shows a characteristic change with thermal denaturation of fibroin. The structural information can be also obtained by mid-IR and CD spectral. Correlation of NIR spectra with protein structure is discussed.

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적외선 복사에너지에 의한 시료의 물리적 손상 측정 (Measurement of Physical Demage of Samples by Infrared Radiation)

  • 정동선;김기훈;한종성;김훈
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2004년도 학술대회 논문집
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    • pp.131-135
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    • 2004
  • The molecules of the substance absorbing a light obtains the radiant energy to the wavelength of the light to make thermal reactions or photochemical reactions. Specially, thermal reactions by infrared radiation brings about physical damage by temperature rise process or temperature drop process of the material. In this study, a measuring system was set up to measure the temperature rise and temperature drop of each sample by infrared radiation from light source. And a physical demage of samples by infrared radiation were measured using the measuring system.

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