적외선 체열영상을 이용한 최신 해외 임상연구 동향

황덕상,박경선,김은경,이창훈,장준복,이경섭,Hwang, Deok-Sang,Park, Kyoung-Sun,Kim, Eun-Gyung,Lee, Chang-Hoon,Jang, Jun-Bock,Lee, Kyung-Sub 대한한방체열의학회 2010 대한한방체열의학회지 Vol.8 No.1

Purpose : This study is to the recent trends of clinical trial using infrared thermography and to review its application in medicine. Methods : We searched for papers which had used infrared thermography in Medicine within 5 years, using English. Results : A total of 23 papers were but 8 were found, but 8 were not related to non-invasive infrared thermography. The other 15 papers were clinical trials about the effect of acupuncture and therapeutic massage, evaluation of post-hepatic neuralgia, sleep disorder, and regional circulation. Conclusion : These results suggest that infrared thermography can be used as a reliable and helpful method in many clinical trials.

A Method to Simulate Frictional Heating at Defects in Ultrasonic Infrared Thermography

Wonjae Choi,Manyong Choi,Jeonghak Park 한국비파괴검사학회 2015 한국비파괴검사학회지 Vol.35 No.6

Ultrasonic infrared thermography is an active thermography methods. In this method, mechanical energy is introduced to a structure, it is converted into heat energy at the defects, and an infrared camera detects the heat for inspection. The heat generation mechanisms are dependent on many factors such as structure characteristics, defect type, excitation method and contact condition, which make it difficult to predict heat distribution in ultrasonic infrared thermography. In this paper, a method to simulate frictional heating, known to be one of the main heat generation mechanisms at the closed defects in metal structures, is proposed for ultrasonic infrared thermography. This method uses linear vibration analysis results without considering the contact boundary condition at the defect so that it is intuitive and simple to implement. Its advantages and disadvantages are also discussed. The simulation results show good agreement with the modal analysis and experiment result.

A Method to Simulate Frictional Heating at Defects in Ultrasonic Infrared Thermography

최원재,최만용,박정학 한국비파괴검사학회 2015 한국비파괴검사학회지 Vol.35 No.6

Ultrasonic infrared thermography is an active thermography methods. In this method, mechanical energy is introduced to a structure, it is converted into heat energy at the defects, and an infrared camera detects the heat for inspection. The heat generation mechanisms are dependent on many factors such as structure characteristics, defect type, excitation method and contact condition, which make it difficult to predict heat distribution in ultrasonic infrared thermography. In this paper, a method to simulate frictional heating, known to be one of the main heat generation mechanisms at the closed defects in metal structures, is proposed for ultrasonic infrared thermography. This method uses linear vibration analysis results without considering the contact boundary condition at the defect so that it is intuitive and simple to implement. Its advantages and disadvantages are also discussed. The simulation results show good agreement with the modal analysis and experiment result.

A Method to Simulate Frictional Heating at Defects in Ultrasonic Infrared Thermography

Choi, Wonjae,Choi, Manyong,Park, Jeonghak The Korean Society for Nondestructive Testing 2015 한국비파괴검사학회지 Vol.35 No.6

Ultrasonic infrared thermography is an active thermography methods. In this method, mechanical energy is introduced to a structure, it is converted into heat energy at the defects, and an infrared camera detects the heat for inspection. The heat generation mechanisms are dependent on many factors such as structure characteristics, defect type, excitation method and contact condition, which make it difficult to predict heat distribution in ultrasonic infrared thermography. In this paper, a method to simulate frictional heating, known to be one of the main heat generation mechanisms at the closed defects in metal structures, is proposed for ultrasonic infrared thermography. This method uses linear vibration analysis results without considering the contact boundary condition at the defect so that it is intuitive and simple to implement. Its advantages and disadvantages are also discussed. The simulation results show good agreement with the modal analysis and experiment result.

터널 내부 안전진단을 위한 적외선 열화상 계측기술

한용기,최만용,박정학,김원태,홍사장 한국비파괴검사학회 2004 학술대회 논문집 Vol.- No.-

기존의 국부적 내부결함에 대한 초음파 검사법에 비해 광역의 스캐닝 방식에 의한 터널내 결함진단 대한 열화상을 이용한 연구가 최근에 활발히 진행되고 있다. 본 고에서는 비접촉 및 비파괴 기법으로 외부 및 내부에 결함을 갖는 터널에서의 결함을 열화상으로 검출하는 계측기술을 연구하여, 결함과 열화상패턴간의 특성을 분석하는 것이다. 터널 내에서의 결함은 특징적으로 결함의 형태가 누수, 구조물의 함몰, 부분적으로 국부적 재료 상태에 따른 백태 등 다양한 적외선열화상을 얻을 수 있었으며, 이로부터 결함부위의 열화상 패턴을 계측하는 기술을 분석하였다. 특히, 이동이 가능한 적외선 카메라를 이용한 열화상 계측기법으로 국부적 위치에서의 적절한 결함패턴을 신속히 검침하여 안전진단에 적용 가능함을 알 수 있다. In the recent, infrared(IR) thermography has been particularly useful tool for its rapid scanning and the diagnosis of defect for damage states in tunnels compared to the local point-by-point detection. This paper aims at the detection for the relevant infrared thermography in the concrete with internal and external defects as a non-destructive and non-contact technique. There are various defects in an internal tunnel, like leakage, crack, spalling, efflorescence and scaling and so on. In a concrete tunnel, The defection and sound part differentiate in the temperature, so using the infrared thermography, the defections of tunnel are inspected easily. Because the thermal conductivities differ the defection parts from another parts each other, it can detect in the infrared thermography. On the local spot, it accompanied with a spatial and temporal restriction. Therefore, by scanning the concrete lining with a movable infrared camera, the inspection can be efficiently applicable. the safety health monitoring

옥돌을 이용한 건식 사우나 시스템 개발

최태현 ( Tae-hyun Choi ),황규업 ( Gyu-eob Hwang ) 한국고등직업교육학회 2000 한국고등직업교육학회논문집 Vol.1 No.4

Far infrared radiation of Jade used in sauna system system was studied. To study far infrared radiation properties of Jade, composition of Jade was analyzed, and X-ray diffraction(XRD), thermal analysis(DTA/TG), scanning electron micro scope(SEM), thermography were used. Chemical composition of starting materials was mainly composed of SiO2(40.10%) and MgO(37.1%). The chemical structure was antigorite(3MgO · 2SiO2 · 2H2O) by X-ray diffraction. The weight loss of Jade was 12.45% by thermal analysis at the temperature range of 25°C~1,450℃. SiO2 was transformed to β-tridymite from β-quartz by temperature increase. The effect of far infrared radiation was observed by photo thermography. We found that the far infrared radiation energy (W/m² · ㎛ · °C) was 3.74×102 and radiation rate (5~20㎛) of Jade was 0.93.

적외선 열화상 기법을 이용한 용접부의 결함 비파괴 측정기법

박수범(Park, Soo-Beom),오진탁(Oh, Jin-Tak),주영규(Ju, Young K.) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.11

Recently, the Infrared-Thermography Technique is widely used for nondestructive testing (NDT) of structures due to its convenience. In particular, various techniques have been applied to detect imperfections such as surface defects and welding defects of steel structures. This paper is a part of a study to detect defects in weld zone in steel structures using Infrared Thermography techniques. The temperature on steel structures surface depends on the material and thermal properties such as specific heat, thermal conductivity, and thermal diffusion coefficient. In this study, Infrared thermography technique was used to detect the information on the diagnosis of steel structure in welds. Test specimens were prepared with artificial defects, then the passive and active methods were used to determine damages on the steel structures in welds as well to detect the defects. Finally, defects were observed by comparing infrared thermal image and surface temperature data of defected area with the normal area. Furthermore, the defects were measured using the standard deviation of the temperature corresponding to the weld. For normal weld, the standard deviation of the temperature corresponding to the weld zone was low; although the standard deviation of the weld defects zone was high.

적외선 체열진단술을 이용한 뇌졸중후 중추성통증의 평가

이두익,김건식,정병식,최도영 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2001 No.-

Background : Central poststroke pain (CPSP) can occur as a result of lesion or dysfunction of the brain from stroke, and may influence the autonomic nervous system to regulate the vasomotor activity which could result in the lowered skin temperature. In this study, objective evaluation of the CPSP was tried through the investigation of the infrared thermography. Methods : Thirty six patients of the CPSP were evaluated their pain with VAS (visual analog scale) pain score and the skin temperature of pain site by infrared thermography before and after pain treatment. Results : The most common site of stroke is thalamus (50%) and followed by postcentral gyrus (33%) and basal ganglia j(8%), and the most common sites of CPSP is unilateral upper extermity (50%) and followed by hemibody without face (22%) and unliateral lower extrremity (17%). The common characteristics of CPSP are tingling (67%), burning (50%), aching (50%), hyperalgesia (44%), and allodynia (33%). The skin temperature of pain site was lower than non-pain site by 0.9±0.4℃ before treatment and improved by 0.4±0.2℃ after treatment, in accordance with improvement of VAS scones from 7.5 to 5.2 after treatment. Conclusions : The skin temperature of sites with CPSP was significantly lower than that of non-pain site and increased after pain treatment. And we thought infrared thermography is very useful devide for the evaluation of CPSP and its treatment. Korean Soc Dignostic Thermol 2001;1:54-57)

The Effectiveness of Infrared Thermography in Patients with Whiplash Injury

Lee, Young Seo,Paeng, Sung Hwa,Farhadi, Hooman F.,Lee, Won Hee,Kim, Sung Tae,Lee, Kun Su The Korean Neurosurgical Society 2015 Journal of Korean neurosurgical society Vol.57 No.4

Objective : This study aims to visualize the subjective symptoms before and after the treatment of whiplash injury using infrared (IR) thermography. Methods : IR thermography was performed for 42 patients who were diagnosed with whiplash injury. There were 19 male and 23 female patients. The mean age was 43.12 years. Thermal differences (${\Delta}T$) in the neck and shoulder and changes in the thermal differences (${\Delta}dT$) before and after treatment were analyzed. Pain after injury was evaluated using visual analogue scale (VAS) before and after treatment (${\Delta}VAS$). The correlations between ${\Delta}dT$ and ${\Delta}VAS$ results before and after the treatment were examined. We used Digital Infrared Thermal Imaging equipment of Dorex company for IR thermography. Results : The skin temperature of the neck and shoulder immediately after injury showed $1-2^{\circ}C$ hyperthermia than normal. After two weeks, the skin temperature was normal range. ${\Delta}T$ after immediately injuy was higher than normal value, but it was gradually near the normal value after two weeks. ${\Delta}dT$ before and after treatment were statistically significant (p<0.05). VAS of the neck and shoulder significantly reduced after 2 week (p=0.001). Also, there was significant correlation between ${\Delta}dT$ and reduced ${\Delta}VAS$ (the neck; r=0.412, p<0.007) (the shoulder; r=0.648, p<0.000). Conclusion : The skin temperature of sites with whiplash injury is immediately hyperthermia and gradually decreased after two weeks, finally it got close to normal temperature. These were highly correlated with reduced VAS. IR thermography can be a reliable tool to visualize the symptoms of whiplash injury and the effectiveness of treatment in clinical settings.

Evaluation of the characteristics of the reflection plate to measure defects in the invisible area using infrared thermography

Kim, Sang Chae,Park, Il Cheol,Kang, Chan Geun,Jung, Hyunchul,Chung, Woon Kwan,Kim, Kyeong Suk Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.4

Defect inspection system for industrial applications takes the important portion. Non-destructive inspection method has been significantly improved. Infrared thermography, as one of method for non-destructive inspection, can provide relatively precise data and quick inspection time. This study, it was performed to measure defect according to the measurement limit of the non-visible areas such as the back surface of the pipe using reflection plate using reflection plate based on Infrared thermography. The materials of the reflection plate were determined in consideration of the space limitation and the thermal characteristics, and defects were detected by the manufactured reflection plate. Detection of defect in non-visible area using the candidate materials for reflection plate was conducted.