크레인의 고압 전선로 접근 경보장치

최삼진(Sam-Jin Choi),김현식(Kim Hyun-sik),이종호(Jong-ho lee),김일환(Il-Hwan Kim),박찬원(Chan-won Park) 대한전기학회 2001 대한전기학회 학술대회 논문집 Vol.2001 No.7

유도전위 검출방식을 이용한 크레인의 고압 전선로 접근 경보장치 개발

최삼진(Choi Sam Jin),박찬원(Park Chan Won),김일환(Kim Il Hwan) 강원대학교 산업기술연구소 2001 産業技術硏究 Vol.21 No.1

This paper describes the power line proximity warning device for mobile crane by using the induced voltage measurement method. A mobile crane worker can be easily exposed to dangerous electrical shock and the electrocution while this are working at near the high-voltage electrical lines. In this paper, the derivation electric-potential of the power lines are simulated and microprocessor-based detecting device and transmitter/receiver modules are introduced to show a solution for the dangerous mobile crane working environment.

Low cost형 3차원 Force Sensor

박찬원(Chan-won Park),최삼진(Sam-Jin Choi),신상열(Sang-Yourl Shin) 대한전기학회 2000 대한전기학회 학술대회 논문집 Vol.2000 No.7

다중가스센서를 이용한 화재의 조기검출에 대한 연구

조시형 ( Si Hyung Cho ),장향원 ( Hyang Won Jang ),전진욱 ( Jin Wook Jeon ),최석임 ( Seok Im Choi ),김선규 ( Sun Gyu Kim ),강종위 ( Zhong Wei Jiang ),최삼진 ( Sam Jin Choi ),박찬원 ( Chan Won Park ) 한국센서학회 2014 센서학회지 Vol.23 No.5

This paper introduced a novel multi-gas sensor detector with simple signal processing algorithm. This device was evaluated by investigating the characteristics of combustible materials using fire-generated smell and smoke. Plural sensors including TGS821, TGS2442, and TGS260X were equipped to detect carbon monoxide, hydrogen gas, and gaseous air contaminants which exist in cigarette smoke, respectively. Signal processing algorithm based on the difference of response times in fire-generated gases was implemented with early and accurately fire detection from multiple gas sensing signals. All fire experiments were performed in a virtual fire chamber. The cigarette, cotton fiber, hair, polyester fiber, nylon fiber, paper, and bread were used as a combustible material. This analyzing software and sensor controlling algorithm were embedded into 8-bit micro-controller. Also the detected multiple gas sensor signals were simultaneously transferred to the personnel computer. The results showed that the air pollution detecting sensor could be used as an efficient sensor for a fire detector which showed high sensitivity in volatile organic compounds. The proposed detecting algorithm may give more information to us compared to the conventional method for determining a threshold value. A fire detecting device with a multi-sensor is likely to be a practical and commercial technology, which can be used for domestic and office environment as well as has a comparatively low cost and high efficiency compared to the conventional device.

다양한 단면 두께의 얼굴 전산화단층촬영 사진을 이용하여 측정한 안와용적 비교

김혜지(Hye Jee Kim),한지상(Ji Sang Han),박인기(In Ki Park),최삼진(Sam Jin Choi),신재호(Jae Ho Shin) 대한안과학회 2016 대한안과학회지 Vol.57 No.11

목적: 다양한 단면 두께로 촬영된 얼굴 전산화단층촬영 축영상과 관상영상 사진을 반자동화 프로그램을 사용하여 안와 용적을 측정하여 차이를 비교하고자 하였다. 대상과 방법: 2 mm, 2.5 mm, 3 mm의 두께로 얼굴 전산화단층촬영을 시행한 30대 성인 남성 50명에 대하여, 안와 용적의 측정이 가능한 반자동화 프로그램(MATLAB 2009aⓇ)을 이용하여 얼굴 전산화단층촬영 사진의 축영상과 관상영상 사진 모두 안와 단면적을 각각 측정하였고, 측정 단면적을 누적하여 안와 용적을 계산하여 이를 비교 분석하여 보았다. 결과: 2 mm로 측정한 축영상에서 우측 33.14 ± 2.37 cm3, 좌측 34.32 ± 2.60 cm3, 관상영상에서 우측 35.54 ± 3.58 cm3, 좌측34.96 ± 4.05 cm3로 측정되었고, 2.5 mm 간격으로 측정한 축영상에서 우측 33.28 ± 3.35 cm3, 좌측 33.73 ± 4.10 cm3, 관상영상에서 우측 35.24 ± 3.98 cm3, 좌측 35.10 ± 3.93 cm3로 측정되었다. 3.0 mm 간격으로 측정한 축영상에서 우측 33.23 ± 2.70 cm3,좌측 33.39 ± 2.69 cm3, 관상영상에서 우측 33.20 ± 3.64 cm3, 좌측 32.95 ± 3.45 cm3로 측정되었다. 2 mm 두께로 측정한 축영상을 제외하고 나머지 다섯 군에서 우측과 좌측의 안구 용적이 모두 통계적으로 유의한 차이가 없었다(p〉0.05). 단면 두께에 따른 측정값의 평균은 2 mm 간격의 축영상에서 33.73 ± 2.51 cm3, 관상영상에서 35.25 ± 3.76 cm3, 2.5 mm 간격의 축영상에서 33.50 ±3.67 cm3, 관상영상에서 35.17 ± 3.88 cm3, 3 mm 간격의 축영상에서 33.31 ± 2.65 cm3, 관상영상에서 33.08 ± 3.48 cm3로 측정되어 촬영 간격이 3 mm인 축영상과 관상영상 사진으로부터 각각 측정한 안와 용적 간에 통계적으로 유의한 차이를 보이지 않았다(p3mm=0.62). 결론: 본 연구에서는 단면 두께와 관계 없이 축영상으로 측정한 안와 용적이 비슷하게 측정되어 축영상을 이용한 측정법이 안와 용적측정에 유용함을 증명하였다. 또한 넓은 단면(3 mm)으로 촬영한 전산화단층촬영의 사진이 좁은 단면(2 mm, 2.5 mm)으로 촬영한 전산화단층촬영의 사진보다 안구 용적 측정 시 높은 재현성을 보여 저자들이 고안한 프로그램을 사용하여 안와 용적을 측정할 때는 3 mm 간격의 넓은 간격의 전산화단층촬영이 적절할 것이라 생각된다. 〈대한안과학회지 2016;57(11):1671-1677〉 Purpose: To compare the orbital volume calculated from various slice thickness facial computed tomography scans using a semi-automated computer program. Methods: Axial and coronal scans of 2, 2.5, 3 mm slice thickness facial computed tomography scans were used to measure the orbital volume. The cross-sectional area was determined from each slice using a semi-automated computer program (MATLAB 2009a??, MathWorks, Inc., Natick, MA, USA), and then the volume was calculated from serial reconstruction of the cross sections. Results: The measured value in the 2 mm images was 33.14 ± 2.37 cm3 in the right orbit and 34.32 ± 2.60 cm3 in the left orbit for the axial scans, and 35.54 ± 3.58 cm3 in the right orbit and 34.96 ± 4.05 cm3 in the left orbit for the coronal scans. In the 2.5 mm images, the values were 33.28 ± 3.35 cm3 in the right orbit and 33.73 ± 4.10 cm3 in the left orbit for the axial scans, and 35.24 ± 3.98 cm3 in the right orbit and 35.10 ± 3.93 cm3 in the left orbit for the coronal scans. In the 3 mm images, the values were 33.23 ± 2.70 cm3 in the right orbit and 33.39 ± 2.69 cm3 in the left orbit for the axial scans, and 33.20 ± 3.64 cm3 in the right orbit and 32.95 ± 3.45 cm3 in the left orbit for the coronal scans. In the 3 mm image, there was not a significant difference in the calculated volume between the axial and coronal scans (p3m m = 0.62). Conclusions: Because there is no difference in the results of the orbital volumetric measurements between three other slice thicknesses in the axial scan, using axial scan images with a computer program that semi-automatically calculates orbital volume is useful. In addition, the volume measured by thick slice images has more reproducibility than the volume measured by thin slice images. J Korean Ophthalmol Soc 2016;57(11):1671-1677

무선 심음 청진 시스템과 심음 해석 기법 개발에 관한 연구

최삼진,江鐘偉,박찬원,김일환 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

In this paper, a wireless heart sound stethoscope system and its characteristic waveform method with an electronic stethoscope, wireless transmitter and receiver modules are proposed. Heart sounds recorded by this system can be easily transmitted to personnel computers using wireless communication devices. moreover, the kinematic model inducing from the human eardrum property is proposed for various heart sounds analysis. The validity of the hardware system of the heart sound characteristic waveform method and normal heart sound signals recorded from on are tested and verified.

유도전위 검출방식을 이용한 크레인의 고압 전선로 접근 경보장치 개발

최삼진,박찬원,김일환 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A

This paper describes the power line proximity warning device for mobile crane by using the induced voltage measurement method. A mobile crane worker can be easily exposed to dangerous electrical shock and the electrocution while this are working at near the high-voltage electrical lines. In this paper, the derivation electric-potential of the power lines are simulated and microprocessor-based detecting device and transmitter/receiver modules are introduced to show a solution for the dangerous mobile crane working environment.

방사선사진의 인덱스-순서 분석을 통한 치아경조직의 탈염화 검출

박동현,박영호,김경숙,박정훈,이기자,최삼진,최용석,황의환,박헌국 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2

Purpose : The purpose of this study was to develop the radiographic technique for detecting the demineralization which is known as indication of dental caries. Materials and Methods : This technique was based on the comparing of multiple radiographs which was irradiated by multiple X-ray spectra. For the meaningful comparing, the multiple radiographs were reconstructed to the dosimetrically consistent images using a standard material. The difference of resulting images of same target with multiple spectra represents the difference of response of material as regards the spectra. Results : We have found about 10% of demineralization of dental hard tissues particularly in the proximal region through the analyzing of differences. Conclusion : Most intriguing thing in this investigation was that the method to analyze difference shows us to an anatomic structure of dental hard tissues even if absolute values of optical density were excluded during the procedures.