• Annual Conference of KIPS
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• 2013.11a
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• pp.526-528
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• 2013

최근 실내 측위 기술을 이용한 다양한 서비스 제공을 위해 많은 위치 인식 기법이 연구되고 있다. 기존의 실내 위치 인식 기법은 사전에 획득한 맵 정보나 미리 구축한 기반 시설이 필요하거나, 추가 장비를 착용 및 부착해야 하는 단점이 있었다. 이에 본 논문에서는 스마트폰 내부센서를 이용하여 실내에서 사용자의 위치를 측정하는 시스템을 제안하였다. 제안한 시스템은 가속도 센서를 이용하여 이동여부를 파악하고, 사용자의 평균적인 이동속도와 방향센서를 이용하여 획득한 이동방향을 이용하여 위치를 추정한다. 제안한 시스템을 안드로이드 스마트폰에 구현하여 실험한 결과 약 ${\pm}75cm$ 이내의 오차에서 위치 인식이 가능함을 확인하였다.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.3
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• pp.329-334
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• 2011

This paper presents the method for location estimation with obstacle tracking method. A laser scanner is used to implement the system, and we assume that the map information is known. We matches the measurement of the laser scanner to estimate the location of the robot by using sequential monte carlo (SMC) method. After estimating the robot's location, the pose of obstacles are detected and tracked, hence, we can predict the collision risk of them. Finally, we present the experiment results to verify the proposed method.

• Annual Conference of KIPS
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• 2022.05a
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• pp.145-146
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• 2022

고령화에 잇따른 질병 중 치매는 배회 증상 및 여러 사고를 발생시킨다. 그러나 실내외 전반에 걸친 치매환자 위치 파악 시스템이 부재하기에 본 논문에서는 치매환자의 웨어러블 디바이스에 내장된 Beacon과 GPS를 통해 실내외 위치를 파악하고, SaMD 기능을 통해 치매환자의 신체 상태를 파악하여 보호자와 구조요청기관에 알릴 수 있는 기법을 제안한다.

• Journal of Korea Spatial Information System Society
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• v.11 no.1
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• pp.195-199
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• 2009

Augmented reality is a field of computer research which deals with the combination of real-world and computer-generated data, where computer graphics objects are blended into real footage in real time and it has tremendous potential in visualizing geospatial information. However, to utilize augmented reality in mobile system, many researches have undergone with GPS or marker based approaches. Localization and tracking of current position become more complex problem when it is used in indoor environments. Many proposed RF based tracking and localization. However, it does cause deployment problems of large sensors and readers. In this paper, we present a noble markerless AR approach for indoor navigation system only using a camera. We will apply this work to mobile seamless indoor/outdoor u-GIS system.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.5A
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• pp.526-536
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• 2006

According as Ubiquitous comes, interest for indoor location tracking system was more increased socially. However, existing indoor location tracking system doesn't correspond actively in frequent change of indoor environment, and there is a problem that correct location measurement of transfer object is difficult by NLOS property of indoor environment. Purpose of this paper proposes environment accommodation location tracking system that is improved location precision of transfer object and grasps location of indoor transfer object effectively that is essential element effectively to provide service to satisfy various user's request according as Ubiquitous comes.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.6
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• pp.192-207
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• 2020

In industrial fields like big factories, efficient management of resources is critical in terms of time and expense. So, inefficient management of resources leads to additional costs. Nevertheless, in many cases, there is no proper system to manage resources. This study proposes a system to manage and track large-scale resources efficiently. We attached Bluetooth 5.0-based beacons to our target resources to track them in real time, and by saving their transportation data we can understand flows of resources. Also, we applied a diagonal survey method to estimate the location of beacons so we are able to build an efficient and accurate system. As a result, We achieve 47% more accurate results than traditional trilateration method.

• Annual Conference of KIPS
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• 2015.10a
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• pp.281-283
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• 2015

최근 청소로봇이나 재활로봇 등과 같은 일상생활에서 활용 가능한 로봇 기술에 대한 연구가 활발한데 특히 실내외 경로주행시스템에 관한 연구 사례가 증가하고 있다. 본 논문에서는 제한된 실내공간에서 로봇을 이용하여 감시카메라를 활용한 위치 인식을 기반으로 경로를 자율적으로 주행 하는 시스템을 제안한다. 이 시스템은 서버, 로봇, App 세 가지 모듈로 구성되어 사용자로부터 App을 통해 받은 목적지 정보에 따라 서버가 경로를 생성하여 로봇에게 경로를 제공하고 로봇은 감시카메라의 로봇 위치 정보에 대해 서버와 지속적으로 통신하며 목적지까지 이동하는 방식으로 운영된다. 이동 로봇의 위치 정보를 파악해 정확성 높은 경로 주행 시스템을 목표로 하며 향후에 병원, 학교 등과 같은 실내 공간에서 활용가능하리라 기대한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.203-204
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• 2015

최근 실내에서 아동 및 치매노인의 실종사고가 빈번히 발생함에 따라 안전에 대한 관심이 높아지고 있다. 이에 아동 및 치매노인의 위치를 알 수 있도록 GPS를 활용한 제품들이 출시되고 있다. 하지만 GPS단말기는 실내에서 위치추적이 불가능하다는 단점이 있다. 따라서 본 논문에서는 실외뿐만 아니라 실내에서도 대상자의 위치를 실시간으로 파악할 수 있는 위치추적 시스템을 개발한다. 개발된 시스템을 이용하여 피보호자가 이동한 경로를 실시간으로 추적하는데 도움을 줄 수 있다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.3
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• pp.155-162
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• 2012

In this paper, we proposed a method of improving the location estimation error existing in RTLS (Real Time Location Service) system for the mobility individual. According as Ubiquitous comes, interest for indoor location tracking system was more increased socially. However, existing indoor location tracking system doesn't correspond actively in frequent change of indoor environment, and there is a problem that correct location measurement of transfer object is difficult by NLOS property of indoor environment. Purpose of this paper proposes environment accommodation location tracking system that is improved location precision of transfer object and grasps location of indoor transfer object effectively that is essential element effectively to provide service to satisfy various user's request according as Ubiquitous comes.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.1
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• pp.207-214
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• 2016

RFID technology is a technology perceiving information with the device called reader and tag which is now used in public transportation such as Hi-pass. In this paper, we design a system which tracks indoor location using this technology. GPS, the most frequently used location-tracking system, has a defect that its accuracy decreases when the device is indoor. In suggested experiment, we simulate signals according to the moving of located objects, then compare with the result of the experiment. Based on the extracted data, we inform data which is for the purpose of tracking system based on analysis of the route and errors. Simulations for the tracking were performed with relocation of real objects. In the real experiment, we arrange the readers around the room and move the tagged object that we like to know the location, then analyze the data from the equipment. This paper suggests the analyzed data for the future indoor tag tracking applications. We expect that the RFID based location positioning data will be used for other indoor positioning research and development.