• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.10
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• pp.2321-2330
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• 2015

A variety of studies for indoor positioning are now being in progress due to the limit of GPS that becomes obsolete in the room. However, most of them are based on private wireless networks and the situation is difficult to commercialize them since they are expensive in terms of installation and maintenance costs, non-real-time, and not accurate. This paper applies the mark recognition algorithm used in existing augmented reality applications to the indoor vehicle positioning application. It installs floor marks on the ground, performs the perspective transformation on it and decodes the internal data of the mark and, as a result, it obtains an absolute coordinate. Through the geometric analysis, it obtains current position (relative coordinates) of a vehicle away from the mark and the heading direction of the vehicle. The experiment results show that when installing the marks every 5 meter, an error under about 30 cm occurred. In addition, it is also shown that the mark recognition rate is 43.2% of 20 frames per second at the vehicle speed of 20km/h. Thus, it is thought that this idea is commercially valuable.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.851-853
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• 2013

Recently, location-based service as the developed continuously, interest in positioning technology is increasing. As the most famous indoor positioning technology, WPS is a positioning technology using WiFi, which can complement the limits of the indoor positioning to have a GPS. In this paper, to provide a system for monitoring the position of the inside of the user based on the position information that using the RSSI signal of the wireless AP based WPS technology, they grip the location information of the mobile nodes in the indoor. If using the method proposed, it is expected to be applied to various services it is possible to apply the WPS, this is because it is possible to estimate in real time the location distribution of mobile nodes in the indoor.

• Journal of Satellite, Information and Communications
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• v.8 no.4
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• pp.64-69
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• 2013

Recently, users who are interested in the service at indoor spaces is increasing. An indoor positioning system can minimize a range of positioning error using a variety of wireless communication infrastructure. Also, the system improves an indoor positioning accuracy by combining a mobile communication network. However, flexible positioning technologies regardless of an environment are insufficient. Therefore, this is time for a systematic study on an indoor positioning system business model. This paper classify differences between an indoor positioning system technology and outdoor positioning system technology. And we research a construction and application of the indoor positioning system that is adapted a wireless communication system (Wi-Fi, Bluetooth, RFID, UWE, Fingerprint, etc.) in domestic and foreign. We present a successful model of indoor positioning system and the development for future systems.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.1-7
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• 2018

Recently, the activity area in the indoor space has been widening. Various types of service technologies have been developed and applied user location, tracking, spatial pattern analysis and environmental analysis in indoor space. BLE-based beacon is used for the service technology in the indoor space. Therefore, in this paper, we collected and analyzed signals for indoor positioning based on beacon. For this purpose, a module was designed to analyze the efficiency of indoor location measurement using beacon. Experimental results show that the accuracy of the measured data at close range is improved. Also, it was analyzed that the more accurate the position data is extracted without the obstacle in the indoor space.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.87-88
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• 2016

본 논문에서는 현재 서비스 중인 지자기를 이용한 위치인식 서비스를 더울 효율적이고 정확하게 이용하기 위해, 스마트폰 카메라 기능을 이용한 이미지 인식 서비스 기술을 융합하여 상호 보완적이고 완성적인 실내 위치인식 서비스 시스템을 제안하고자 한다. 본 시스템은 스마트폰 카메라와 지자기 센서를 이용하여 특정 인프라 구축 없이 데이터 분석만으로 실내 측위 시스템 구현을 목표로 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2021.06a
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• pp.250-252
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• 2021

블루투스 비콘을 이용한 실내 측위 시스템에서 수신 RSSI 신호는 다중경로 페이딩, 주변 신호의 간섭 등의 영향으로 인하여 불규칙한 잡음이 섞이게 된다. 본 논문에서는 실제 실내 환경에서의 측정을 통해 RSSI 신호의 통계적 특성을 분석한다. 또한, RSSI 신호의 잡음을 완화시켜서 효과적으로 실내 측위를 수행할 수 있는 방안에 대해서도 모색해 본다.

• Smart Media Journal
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• v.4 no.2
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• pp.68-76
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• 2015

Recently, research on indoor locating techniques using smart device sensors has been conducted actively, Owing to the exponential increase in the use of various smart devices. However, in order to develop indoor location techniques, there are limitations due to the requirement that the tracking system has to function without GPS. In this paper, we propose an accurate indoor locating system that does not require additional infrastructure. The proposed scheme is developed based on the idea that the advantages and disadvantages of "Wi-Fi Fingerprinting" and "Step Detection" techniques are complementary. In the proposed scheme, we track users with "Step Detection," and correct errors with "Wi-Fi Fingerprinting." In this paper, we demonstrate the effectiveness and feasibility of our proposed scheme through experiments.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.298-300
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• 2015

Beacon is a signal device, which mainly used to support the safety of the locate and operation of a watercraft and aircraft. Recently, the IT sector BLE (Bluetooth Low Energy) also made possible to operate with less energy over several months using a beacon standards are applied. In addition, the location-based services and technologies using BLE Beacon has attracted attention. However, there is the problem that by using only the position location Beacon devices when high error rate can be measured accurate position. Therefore, in this paper, combines WiFi and Beacon based on Smartphone. Also propose an indoor positioning algorithm reduces the error rate of the position location value.

• Electronics and Telecommunications Trends
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• v.22 no.2 s.104
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• pp.48-57
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• 2007

본 고에서 다루고자 하는 지능형 로봇 공간(intelligent robotic space)은 이동성(mobility), 조작성(manipulability)으로 대표되는 로봇의 독특한 기능을 분산센싱, 분산처리환경을 구축하여 고기능화함으로써 자연스러운 이동, 조작기능의 구현이 가능한 공간으로 정의할 수 있다. 이는 개념적으로 가상 공간(virtual space), 추론 공간(semantic space), 물리 공간(physical space)으로 구성된다. 가상 공간은 로봇-센서간 융합을 통한 환경지도 작성 및 표현을 위한 플랫폼 기술이고 추론 공간은 로봇 및 로봇과 연동된 사람이나 사물의 상태 해석을 위한 객체 모델 기술이다. 물리 공간은 지능형이동성과 로봇 조작 능력의 향상을 위한 지능형 하드웨어 공간이다. 본 고에서는 물리공간에서 가장 핵심적인 이슈인 실내 측위기술에 대해서 알아본다. 측위기술은 사람이나 사물의 위치를 정밀하게 결정하여 로봇이 인간과 공존할 수 있도록 안정적이고 신뢰성 있는 측위 정보를 제공하는 것을 목적으로 한다. 지능형 로봇을 위한 측위기술은 크게 무선 센서네트워크 기반의 광역(coarse) 위치 결정과 RFID 및 로봇 비전(vision)을 기반으로 하는 정밀(fine) 위치 결정으로 나뉘어진다. 본 고에서는 Wi-Fi, ZigBee, UWB를 이용하는 무선 센서네트워크 기반의 실내 위치 측정에 관한 연구 개발 동향을 분석하고 각각의 기술이 가지는 장단점을 비교한다.

• Broadcasting and Media Magazine
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• v.25 no.1
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• pp.75-82
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• 2020

디지털 트윈이나 증강현실, 가상현실, 자율주행 등과 같이 현실 좌표계의 위치를 다루거나 현실과 가상세계를 융합하는 기술들에 있어 측위 기술은 상당히 주요하게 작용한다. 측위 기술은 그 목적과 타겟 디바이스에 따라 매우 다양하게 존재하며, 기존 측위 기술들에 인공지능을 융합하여 정밀도와 측위 주기를 개선시키는 등 다양한 연구가 진행되고 있는 분야이다. 본 고에서는 기존의 다양한 측위 기술들의 동향과 인공지능을 융합하여 성능을 높인 사례들에 대해 설명한다.