• Title/Summary/Keyword: device development

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Development of Rehabilitation Medicine Device for Compound Joint Motion (복합관절 운동용 재활의료기기)

  • 정성훈;유범상;김남균;박상민;송문상
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.704-708
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    • 2004
  • The RMD(Rehabilitation Medicine Device) with CJM(Compound Joint Motion) is the lower limb unit muscular strengthening promotion rehabilitation medicine device for patients of joint orthopedic operation or the deficient elder of ability to walk, the handicapped. Since the products for the rehabilitation medicine device have limited to the simplicity linear motion, those do not give efficient the lower unit muscular strengthening effects. This device which was under the development gives to exercise of hip joint and knee joint with user's selection at once, get out of the simplicity linear motion. Also it will be contributed to a field of rehabilitation medicine and a mobility aid technology of the deficient elders of ability to walk, the handicapped.

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A Study on the Impact Sensing Device for Improving the Firing Function Reliability of ESAF (ESAF의 기폭 신뢰성 향상을 위한 충격감지장치 연구)

  • Jo, Seyoung
    • Journal of the Korea Institute of Military Science and Technology
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    • v.18 no.5
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    • pp.525-531
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    • 2015
  • In this paper, a novel impact sensing device for an ESAF(Electronic Safe and Arming Fuze) is presented. An impact sensing device is mounted in front of a weapon, and it detects an impact when it crashes against a target. There are two main design requirements to enhance the firing functional reliability of the ESAF; an operational reliability and a reduced latency, which is a delay time needed for sensing the impact. The design method of the contact-type impact sensing device, which employs an FPCB(Flexible Printed Circuit Board) so it can be used other weapons, is proposed. The tests demonstrated that the design described in this work show a reduced delay time with ensuring the operational reliability.

A Study on the Algorithm Development of End-point Position Tracking for Aerial Work Platform with Bend-linked Boom (굴절링크 붐을 갖는 장비의 끝점 좌표 추적 알고리즘 개발에 대한 연구)

  • Oh, Seok-Hyung;Hong, Yong
    • Journal of Power System Engineering
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    • v.20 no.3
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    • pp.64-73
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    • 2016
  • In this research work, an algorithm development on tracking end-point of aerial work platform with jib profile and bend-linked boom was carried out to find the X, Y and Z direction value using coordinate transformation matrix. This matrix consists of device status value(length and angle) based on camera position axis, which are sent from device controller PLUS+1 by CAN protocol. These values are used to measure the distance and angle from the camera to the end-point. Using these distance and angle value, monitoring system controls FAN/TILT/ZOOM status of camera to get an adequate scene of workplace. This program was written in Java, C# and C for mobile device. These results provide the information to the aerial work device for secure operation.

Verification for the design limit margin of the power device using the HALT reliability test

  • Chang, YuShin
    • Journal of the Korea Society of Computer and Information
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    • v.23 no.11
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    • pp.67-74
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    • 2018
  • The verification for the design limit margin of the power device for the information communication and surveillance systems using HALT(Highly Accelerated Life Test) reliability test is described. The HALT reliability test performs with a step stress method which change condition until the marginal step in a design and development phase. The HALT test methods are the low temperature(cold) step stress test, the high temperature(hot) step stress test, the thermal shock cyclic stess test, and the high temperature destruct limit(hot DL) step stress test. The power device is checked the operating performance during the test. In this paper, the HALT was performed to find out the design limit margin of the power device.

Development of Numerical Model of Electrode for Radiofrequency Catheter Ablation Considering Saline Irrigation and Temperature-controlled Radiofrequency System (온도 조절형 고주파 시스템 및 식염수 분사를 고려한 전극도자절제술용 전극의 수치 모델 개발)

  • Ahn, Jin-Woo;Kim, Young-Jin;Lee, Seung-A;Jung, Ha-Chul;Kim, Kyung-Ah;Cha, Eun-Jong;Moon, Jin-Hee
    • Journal of Biomedical Engineering Research
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    • v.38 no.6
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    • pp.285-290
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    • 2017
  • Radiofrequency catheter ablation is the interventional therapy that be employed to eliminate cardiac tissue caused by arrhythmias. During radiofrequency catheter ablation, The thrombus can occur at electrode tip if the temperature of tissue and electrode is excess $100^{\circ}C$. To prevent this phenomenon, we investigated numerical model of electrode for radiofrequency catheter ablation considering saline irrigation and temperature-controlled radiofrequency system. The numerical model is based on coupled electric-thermal-flow problem and solved by COMSOL Multiphysics software. The results of the models show that the dimensions of the thermal lesion are increased if the flow rate of the saline irrigation and the set temperature are increased. The surface width characterized to determine the thermal lesion isn't need to measure in temperature-controlled radiofrequency system due to convective heat transfer by saline irrigation at tissue-electrode interface.

International Standards of Electrical Equipments for Medical Practice (의료용 전기기기에 대한 국제표준 현황)

  • Lee, Tae-Bum
    • The Korean Journal of Health Service Management
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    • v.7 no.3
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    • pp.203-212
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    • 2013
  • Medical devices separated by a committee of the International Electrotechnical Commission IEC TC (Technical Committee) 62 medical electrical equipment being promoted by the International standards. Actually, a lot of standards were existed, but many national and international standards for medical devices were lacking in practical standards that can be applied to their development. Most international standards were focused in electrical and mechanical safety of medical devices. Therefore, there were few practical standards which contain essential performance evaluation. Although medical device regulations do not enforce a fixed lifecycle model, activities are presented in a sequential manner, thus hinting at a waterfall process. Meanwhile, for a decade or more, software teams have benefitted from agile development methods. Several medical device manufacturers have adopted agile practices while keeping development in compliance with regulations, but conflicts arise and decisions have to be taken in favor of agility or formality. However, if there are new practical standards of medical devices, it must be possible to promote the medical devices industry in their nation. To do this, there is a need to develop a new standard could apply to the international market through the analysis of the medical device related technology. Consequently, new standards such as NP (New proposal) or NWIP (New Work Item Proposal) should be developed through international standardization of medical device technology.

Evaluation Method of Hairstyling Materials and its Application to Cosmetic Preparations

  • Abe, Hidetoshi;Iida, Ichiro;Someya, Takao
    • Proceedings of the SCSK Conference
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    • 2003.09a
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    • pp.1-12
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    • 2003
  • Instead of sensory evaluation, we designed an evaluation method of the setting function of hairstyling products, based on an original theory focusing on changes in bending stress observed when a load with continuous bending is applied to human hair. Specifically, we developed a device to measure bending stress to quickly and objectively evaluate the condition of human hair, particularly its dynamic properties such as the setting function, following the application of hairstyling products. This device generates a load with continuous bending while applying a pendulum motion to a hair tress, one end of which is anchored. The setting function and holding power of resins of various molecular weight and ionic properties were evaluated using this device. The results demonstrated a close correlation with those obtained by experts' sensory evaluation. The evaluation results of bending stress and holding rate confirmed that the combined use of two different resins could improve the function of setting preparations. Evaluation using this device was able to substitute for sensory evaluation, and offers quick objective evaluation and detection of changes in the holding power of hairstyling products over time. We conclude that evaluation using this device is a promising new method.

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Development of Wheel-Terrain Interaction Device for Mobility Prediction of Off-road Vehicle (야지 차량의 기동성 예측을 위한 휠-토양 상호작용 시험장치 개발)

  • Oh, Hyunhwan;Kim, Gwanyoung;Kim, Jinseong;Shin, Yongjae;Lee, Kyu-Jin;Choi, Minsuk;Lee, Soo Jin
    • Korean Journal of Computational Design and Engineering
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    • v.19 no.4
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    • pp.332-339
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    • 2014
  • This paper presents on the development of wheel-terrain interaction device using low-priced sensors, which will be used to predict the drawbar pull and optimal slip of off-road vehicle in real time. The essential variables obtained in the device to predict the mobility of vehicles are determined based on semi-empirical model describing the wheel-terrain interaction. Using the developed device, the experiments about the wheel-terrain interaction were performed on the soil of the Jumunjin standard sand, which yielded dynamic weight, motor driving torque, drawbar pull, and sinkage with respect to wheel slip ratio. Finally, the repeatability of the measured data are verified through repeating the experiments three times on the same condition.

A Case Study of Virtual Reality Contents Development Using Experience Device (가상현실 체험형 디바이스를 활용한 콘텐츠 개발 사례)

  • Yoo, Myoung-Eun;Lee, Seok-Hee;Song, Eun-Jee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2019.05a
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    • pp.208-210
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    • 2019
  • Creating a virtual reality ecosystem is more important than anything else for virtual reality, which has recently been drawing attention as a sector of the fourth industrial revolution. Virtual reality ecosystem consists of content (C), device (D), platform (P), and network (N). While content is key among these, virtual reality depends on input and output devices, so device utilization is very important. Recently, hands-on devices are being developed for realistic experiences. This study presents examples of contents development using VirZOOM, an experienced device, to reduce immersion and motion sickness of VR contents. We look forward to further promoting the development of virtual reality content in the future through this study.

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