• Title/Summary/Keyword: Laser Sense

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Laser Forming of Sheet Metal by Geometrical Information (기하학적 정보를 이용한 이중곡률 형상의 레이저 성형)

  • Kim, Ji-Tae;Na, Seok-Ju
    • Proceedings of the KWS Conference
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    • 2005.06a
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    • pp.91-93
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    • 2005
  • Forming sheet metal by laser-induced thermal stresses (laser forming) has been extensively studied, and the research has focused on two-dimensional geometries using a multi-pass straight line scan. Recently there came out some useful studies or three-dimensional laser forming which is applied to doubly curved shapes. The task of 3D laser forming sheet metal is to determine a set of process parameters such as laser scanning paths, laser power and scanning speed that will make a given shape. New method for laser forming of a doubly curved surface by using geometrical information was proposed and verified by experiments. This method shows good performance in the sense of calculation time and accuracy compared to the inherent strain method.

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Proposition on Five Sense Smart Screen Elevator System based on Laser Display (레이저 디스플레이 기반 오감만족 스마트 스크린 엘리베이터 시스템 제안)

  • Park, Joo-Bong;Shin, Seung-Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.15 no.1
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    • pp.187-190
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    • 2015
  • Recently, most of people wants to have smart life for themselves like smart phones. In this paper, we propose the smart elevator based on the laser screen, speakers and air fresheners. Using this elevator, we could enjoy the various screen inside, and we could keep contacting with manager for wifi in the emergency situation. Also, the elevator could be operated with user's motion for Kinect. Finally, we did the survey for understanding preference of smart elevator. The grops are elevator manufacturing company, elevator distribution corporation and consumers, each group have 200 people.

CLINICAL APPLICATION OF ARGON LASER IN PEDIATRIC DENTISTRY (아르곤 레이저의 소아치과에서의 임상적 적용)

  • Lee, Mi-Na;Lee, Sang-Hoon;Kim, Chong-Chul
    • Journal of the korean academy of Pediatric Dentistry
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    • v.24 no.1
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    • pp.139-147
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    • 1997
  • Argon laser used in this case report, is special in having two wavelength of 488, 514nm blue-green visible light spectrum. Blue light is used for composite resin polymerization and caries detection. Green light is used for soft tissue surgery and coagulation. Maximum absorption of this laser light occurs in red pigmentation such as hemoglobin. The argon laser may be well-suited for selective destruction of blood clots and hemangioma with minimal damage to adjacent tissues. Argon laser light penetrates tissue to the 1 mm depth, so its thermal intensity is lower than $CO_2$ laser light. Also, due to its short wavelength it can be focused in a small spot and even single gene can be excised by this laser and microscopy. After applicating argon laser to 4 patient for surgical procedure and to 1 patient for curing the composite resin, following results were obtained. 1. Improved visibility were gained due to hemostasis and no specific technique were needed according to easy recontouring of the tissue. 2. Ability to use by contact mode, tactile sense was superior but tissue dragability and accumulation of tissue on the tip needed sweeping motion. 3. Additive local anesthetic procedure was needed. 4. No suture and less curing time reduced chair time, this made argon laser available in pediatric dentistry.

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Development of modern bag design using cultural content from Baekje - Focusing on laser-cutting techniques - (백제 문화콘텐츠의 현대적 활용을 위한 가방 디자인 개발 - 레이저커팅 기법을 중심으로-)

  • Ha, Seung Yeon
    • The Research Journal of the Costume Culture
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    • v.28 no.6
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    • pp.738-754
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    • 2020
  • As a cultural feature of, the relics of the Royal Tomb of King Muryeong are suitable design content for applying with sophisticated production and delicate molding laser cutting techniques. The purpose of this study is to develop modern bag designs using relics of the Royal Tomb of King Muryeong of Baekje using laser-cutting techniques. First, the historical background and meaning of Baekje's cultural content were explored. Second, the principle of laser-cutting techniques were explored, laser-cutting techniques applied to modern fashion and bag design were examined, and bag design characteristics were analyzed. Third, based on prior research, the criteria for the development of bag design, from which eight bag design were developed that combine modern popularity and functionality utilizing Baekje cultural content and using laser-cutting techniques to apply the textile design developed by researchers in 2013 (modified to match laser-cutting techniques). The research results show that bag were clutch, tote, shoulder, and mini. Gold, silver, brown, beige, and navy colors were arranged, based on black/white contrast. Cow, lambskin, washed snakeskin, mesh, and Saffiano leather were used. For the pattern-applying technique, this study showed that a new digital technique, which is laser-cutting techniques could be combined with contemporary bag designs. Moreover, a bag design was developed that has a modern sense and functionality as well as Korean formativeness, which is significant.

Calibration of the depth measurement system with a laser pointer, a camera and a plain mirror

  • Kim, Hyong-Suk;Lin, Chun-Shin;Gim, Seong-Chan;Chae, Hee-Sung
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.1994-1998
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    • 2005
  • Characteristic analysis of the depth measurement system with a laser, a camera and a rotating mirror has been done and the parameter calibration technique for it has been proposed. In the proposed depth measurement system, the laser beam is reflected to the object by the rotating mirror and again the position of the laser beam is observed through the same mirror by the camera. The depth of the object pointed by the laser beam is computed depending on the pixel position on the CCD. There involved several number of internal and external parameters such as inter-pixel distance, focal length, position and orientation of the system components in the depth measurement error. In this paper, it is shown through the error sensitivity analysis of the parameters that the most important parameters in the sense of error sources are the angle of the laser beam and the inter pixel distance. The calibration techniques to minimize the effect of such major parameters are proposed.

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Differences In Joint Position Sense, Force Sense, and Performance Level of the Upper Extremities According to the Sex, Injury and Pain Experiences of Korean Elite Archers (한국 엘리트 양궁선수들의 성별과 부상, 통증 경험에 따른 상지의 관절위치 감각과 힘감각, 경기력 수준의 차이)

  • Kim, Mun-kyo;Kim, Suhn-yeop
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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    • v.27 no.3
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    • pp.1-15
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    • 2021
  • Objective: The purpose of this study was to examine the differences in joint position sense (JPS), force sense (FS), and performance level of the upper extremities according to the injury and pain experiences of Korean elite archers. Methods: A total of 15 subjects were briefed about the purpose of this study and agreed to participate voluntarily. JPS was evaluated using the laser-point attached to the wrist while aiming at the target. The difference when relocating while aiming was used as JPS factor. FS was evaluated using load cell through reproduces same muscle strength. Fear-Avoidance Beliefs Questionnaire (FABQ) was used to evaluate psychosocial factors, Kerlan-Jobe Orthopedic Clinic overhead athlete scores (KJOC) and numerical rating scale (NRS) was used to evaluate pain. and performance was evaluated by tournament match score. Results: There is a strong correlation between the current pain and KJOC. Moreover, moderate correlation between KJOC and FABQ also current pain and both upper trapezius and lower trapezius in elite archers. The mean (SD) between groups based on current pain display relatively large margin in force sense than without pain group. The result presents that there is a significant difference in performance and pain. There is a significant difference in the force sense of the upper and lower trapezius and pain. Conclusions: Result present there is a significant difference in functional level in the average comparison between groups according to the presence of absence of current pain. There is a significant difference in the force sense of the upper trapezius as well as lower trapezius and without pain group present a relatively low joint position sense error compared to the groups.

3D Depth Measurement System based on Parameter Calibration of the Mu1ti-Sensors (실거리 파라미터 교정식 복합센서 기반 3차원 거리측정 시스템)

  • Kim, Jong-Man;Kim, Won-Sop;Hwang, Jong-Sun;Kim, Yeong-Min
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.05a
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    • pp.125-129
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    • 2006
  • The analysis of the depth measurement system with multi-sensors (laser, camera, mirror) has been done and the parameter calibration technique has been proposed. In the proposed depth measurement system, the laser beam is reflected to the object by the rotating mirror and again the position of the laser beam is observed through the same mirror by the camera. The depth of the object pointed by the laser beam is computed depending on the pixel position on the CCD. There involved several number of internal and external parameters such as inter-pixel distance, focal length, position and orientation of the system components in the depth measurement error. In this paper, it is shown through the error sensitivity analysis of the parameters that the most important parameters in the sense of error sources are the angle of the laser beam and the inter pixel distance.

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Estimation of Surface Profile Using Reflected Laser Beam Pattern (레이저 빔 반사 패턴을 이용한 표면 프로파일 추정)

  • 서영호;김화영;안중환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.263-266
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    • 2002
  • An optical method for surface roughness estimation based on statistical analysis of the light intensity of a scattered laser beam pattern. The method is very simple but has a disadvantage that no more information than the averaged roughness is estimated. In this study a new try was conducted to derive more advanced surface information from the details of the light intensity distribution. Some periodic ripples among the light intensity distribution being assumed to relate with scratch left on the machined surface, a corresponding surface profile is estimated from the ripples using FFT and IFFT algorithm. IFFT technique is used to extract some dominant signal components among the intensity distribution. Compared to the measured profiles by a stylus type surf-tester, the profiles obtained through the proposed method are probably acceptable in a sense of the profile shape. Calibration of the amplitude needs more works in the future.

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실시간 전자거리인식을 위한 3차원거리계측 알고리즘

  • Kim, Jong-Man;Sin, Dong-Yong;Lee, Hye-Jeong;Kim, Hyeong-Seok
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2010.03b
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    • pp.5-5
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    • 2010
  • The depth of the object pointed by the laser beam is computed depending on the pixel position on the CCD There involved several number of internal and external parameters such as inter-pixel distance, focal length, position and orientation of the system components in the depth measurement error. In this paper, it is shown through the error sensitivity analysis of the parameters that the most important parameters in the sense of error sources are the angle of the laser beam and the inter pixel distance. Also, the calibration technique to minimize their effect for the depth computation is proposed.

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A Study on the Development of a Ultrasonic Electronic Travel Aid for the Blind (시각장애자의 보행을 유도하기 위한 초음파형 전자보행유도기의 개발에 관한 연구)

  • 김동욱
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.3 no.4
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    • pp.227-232
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    • 2002
  • Electronic Travel Aids (ETA) developed for the blind such as sonicguide, mowat sensor and bionic C-5 laser cane have many problems like technical deficiency and high cost. Moreover, these systems have need for more training to perceive obstacle around. Therefore, In this study, we studied the blind's obstacle perception characteristics by human auditory sense, and development of ultrasonic ETA which have more simple usage, low cost and immediate usableness than present ETAs.

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