• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1205-1212
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• 2021

Robots that can actually help people a lot by dealing with dangerous tasks that are difficult for people to do, such as disaster situations, lifesaving, handling dangerous goods, and reconnaissance of dangerous areas, continue to become an issue. Therefore, in this paper, we intend to implement a mobile robot arm that can implement a human motion will on the robot arm to enable active response according to the situation and control the vehicle according to hand movements to give mobility. A controller is manufactured using a flex sensor and agyro sensor, and the roll and pitch values of the two gyro sensors are adjusted to control the angle of the robot arm and specify the vehicle direction. In addition, by designating the levels of the three flex sensors, the motor is operated according to hand movements, and a robot arm is implemented so that objects can be picked up and moved.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.198-200
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• 2022

In this paper, we are going to explain the development of a platform that can integrate and manage various sensors and data by applying IoT standard technology to a smart city where various services exist. The structure was designed to integrate and manage various data through platform development and process the collected data according to the service. By designing a platform based on the LwM2M standard technology, it is possible to provide a function that can accommodate various devices.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.1086-1087
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• 2017

최근 HMD 디바이스의 발달 및 그래픽 소프트웨어의 발달로 인해 현실과 유사한 느낌을 주는 가상현실 플랫폼 및 컨텐츠 개발이 활발히 이루어지고 있는 추세이다. 하지만, 현재 가상현실 플랫폼은 가상현실 환경과 사용자를 이어주는 UI가 불확실하고 사용법이 직관적이지 않다는 단점을 가지고 있다. 또한, 가상현실을 위한 컨트롤러들은 다양한 형태와 각각 다른 소프트웨어를 사용하고 있어 가상현실 컨텐츠를 이용하는데 제한적이라는 단점이 있다. 본 논문에서는 이러한 단점들을 보완하기 위해 플렉스 센서를 이용한 컨트롤러를 제작하고 이를 가상현실 내에서 출력한 모습에 대한 방법에 대해 설명하며, 추후 이를 활용하여 체감이 가능한 가상현실 컨텐츠로 발전시킬 수 있을 것을 기대한다.

• Journal of Korea Society of Industrial Information Systems
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• v.27 no.2
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• pp.53-59
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• 2022

In this paper, a mobile robot capable of remote control is designed in consideration of the user's various work environments. Specifically, a mobile remote work robot that moves in a predetermined direction and can perform a series of tasks in synchronization with the user's hand movements, and a control system and control method for controlling the robot were proposed. It was implemented using a robot hand and a wheel for movement to assist in tasks such as transporting dangerous goods or heavy goods. In order to evaluate the performance of the developed robot, the maximum weight that can be carried by the robot hand and the movable inclination of the robot were tested, and the test evaluation results satisfied most of the targeted design specifications.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.733-735
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• 2011

최근 센서를 이용한 모니터링 시스템 구축에 대한 관심이 높아지고 그 활용가치도 높아짐에 따라 다양한 분야에서의 센서네트워크 망 구축의 수요가 많아지고 있다. 각각 독립적은 구조를 가지는 센서 네트워크 망의 통합적이고 확장 가능한 형태의 모니터링과 제어를 위하여 OGC 에서는 Sensor Web Enablement (SWE) 표준을 제안하였다. 하지만 국내에서는 이를 적용한 사례가 없다. 또한 따라서 본 논문에서는 OGC 에서 제안한 국제표준인 SWE 에 대해 분석하고 실제 서비스 제공 가능한 형태로 구축하였다. 본 구축은 MVC 모델을 기반으로 오픈 플랫폼으로 개발 되었다. 또한 클라이언트를 플렉스로 개발하여 플래시를 지원하는 다양한 브라우저에서 사용 가능하도록 구현하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06c
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• pp.237-241
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• 2007

본 논문에서는 지화 인식에 최적화된 데이터 글러브 기반의 시스템을 제안한다. 제안된 데이터 글러브는 적은 수의 센서로 인식 속도의 향상을 기대할 수 있으며 한글의 지화 인식만을 위한 특수한 목적을 가지고 저렴하게 설계되었다. 그에 따라 한글의 지화를 사용한 많은 어플리케이션에 쉽게 적용할 수 있을 것이 기대된다. 2개의 틸트 센서는 손의 방향을 인식하고 5개의 플렉스 센서는 각 손가락의 구부러진 정도를 측정한다. 제안된 시스템에서는 k-means 알고리즘과 간단한 인덱싱 방식을 사용하여 한글의 기본적인 음소 24개를 인식하는 실험을 하였으며 인식율은 80.27% 에 이르렀다.

• Journal of Aerospace System Engineering
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• v.17 no.1
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• pp.97-105
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• 2023

For aviation sensor pod, structural integrity should be verified through static structural tests for flight loads induced in various maneuvering conditions of the aircraft. For this, it is necessary to develop a test system for full-scale static load test of sensor pod. Based on test requirements, this paper introduced a test system configuration of the static test and the development of test structure frame, restraints equipment, loading equipment, control, and measurement equipment. In addition, methods and procedures for verifying the developed test system were explained. In conclusion, the static load test and data acquisition were successfully performed. Reliability of the test equipment was also verified in the process.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.1944-1947
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• 2005

In this paper, the control of a prosthetic arm using the flex sensor signal is described. The flex sensors are attached to the biceps and triceps brchii muscle. The signals are passed a differential amplifier and noise filter. And then the signals are converted to digital data by PCI 6036E ADC. From the data, position and velocity of arm joint are obtained. Also motion of the forearm - flexion and extension, the pronation and supination are abstracted from the data by proposed algorithm. A two D.O.F arm with RC servo-motor is designed for experiment. The arm length is 200 mm, weight is 4.5 N. The rotation angle of elbow joint is $120^{\circ}$. Also the rotation angle of the wrist is $180^{\circ}$. Through the experiment, we verified the possibility of the prosthetic arm control using the flex sensor signal. We will try to improve the control accuracy of the prosthetic arm continuously.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.2
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• pp.129-136
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• 2020

Recognizing finger movements have been used as a intuitive way of human-computer interaction. In this study, we implement an wearable device for finger motion recognition and evaluate the accuracy of several ML (Machine learning) techniques. Not only HMM (Hidden markov model) and DTW (Dynamic time warping) techniques that have been traditionally used as time series data analysis, but also NN (Neural network) technique are applied to compare and analyze the accuracy of each technique. In order to minimize the computational requirement, we also apply the pre-processing to each ML techniques. Our extensive evaluations demonstrate that the NN-based gesture recognition system achieves 99.1% recognition accuracy while the HMM and DTW achieve 96.6% and 95.9% recognition accuracy, respectively.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.4
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• pp.67-74
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• 2009

The 'Open Source' of programing is a method that is not only sharing the source, but also making the S/W by the low cost and easy way. In this study, we made the urban facilities management system(FMS) based on the GeoFOSS of Open Source. This system has the GIS function of the urban facilities management, the u-GIS function using the USN for processing the spatial information. Also, as we use the GeoFOSS of 'Open Source', we can have received many benefits. First, this system has the economic impact, because it is not necessary to buy the commercial GIS software. Second, this system can make most functions of the GIS, the performance does not bad compared to other products. Also, this system strictly conforms to the international standards, it is easy to get a repair, maintenance and interoperability.