• IEMEK Journal of Embedded Systems and Applications
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• v.9 no.4
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• pp.229-235
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• 2014

This paper presents an environmental navigation system which provides a guidance to the users of smart bicycle for a pollution-free route during their travel. The smart bicycle operates as a sensor node being composed of a distributed wireless sensor network over the whole urban area. Several environmental sensors measuring the amount of dust, CO, $CO_2$, $NO_2$ in the air are built into the smart bicycle to estimate the level of air pollution in the located area. Each smart bicycle sends/receives the measured sensor data and the city pollution map to/from the centralized server, which leads the bike-riders to a healthy route by providing the environmental navigation information. The proposed idea and its implementation give a useful insight on various application services with the distributed smart bicycles.

• Journal of Advanced Navigation Technology
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• v.22 no.1
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• pp.43-47
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• 2018

In recent years, bicycle craze has been blowing in Korea, and bicycle has become a means of transportation near. In addition, there is a lot of interest in the Internet of things, and recently there is a lot of interest in the Internet of things. However, despite the development of the bicycle market, the bicycle cradle does not have such a development, and it still has a drawback in that it requires a separate lock for the lock. In this regard, I would like to find some problems and solve them. In this paper, we have implemented a system that can control the location and use of the bicycle cradle in real time by communicating with the app and Arduino so that it can help the collection and retrieval of the bicycle which is the problem of the current bicycle cradle. n addition, we propose a method to establish a shared economic system based on Internet of things by providing shared services with acquaintances and others, and to improve user convenience by providing real - time services.

• Journal of Positioning, Navigation, and Timing
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• v.11 no.3
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• pp.209-215
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• 2022

As intelligent autonomous driving vehicle development has become a big topic around the world, accurate reference dynamics estimation has been more important than before. Current systems generally use speed and heading information sensed from a distant point as a vehicle reference dynamic, however, the dynamics between different points are not same especially during rotating motions. In order to estimate properly estimate the reference dynamics from the information such as velocity and heading sensed at a point distant from the reference point such as center of gravity, this study proposes estimating reference dynamics from any location in the vehicle by combining the Bicycle and Ackermann models. A test system was constructed by implementing multiple GNSS/INS equipment on an Robot Operating System (ROS) and an actual car. Angle and speed errors of 10° and 0.2 m/s have been reduced to 0.2° and 0.06 m/s after applying the suggested method.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.201-202
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• 2016

본 프로젝트는 날씨와 GPS 위치정보를 이용해 사용자들에게 자전거 라이딩을 하기 전에 현재 및 예상날씨정보, 로드맵을 제공하는 자전거 애플리케이션이다. GPS 위치정보를 활용한 네비게이션 기능으로 사용자가 자전거 라이딩을 할 때 현재위치, 목적지 경로, 주행 시간, 주행 경로와 같은 유용한 정보들을 제공해주는 프로젝트이다. 일반 자전거 어플리케이션은 자전거 속력, 현재 날씨 등과 같이 간단한 정보들을 제공해 주는 것에 반해 본 프로젝트는 자전거 라이딩 사용자들에게 날씨뿐만 아니라 로드맵을 제공하여 본인의 위치, 경로, 등을 제공하며 길 찾기, 자전거 라이딩 정보를 제공함으로써 사용자들이 자전거를 좀 더 효율적으로 탈 수 있게끔 자전거 어플리케이션을 개발하였다.

• Journal of Internet of Things and Convergence
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• v.2 no.1
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• pp.7-15
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• 2016

Bicycle users were surpassed a million recently as bicycle riding will be a key element of daily life. As users increase, we can expect that the user is more exposed to the risk of an unexpected accident. Therefore, we need to establish several preventive measures for a safe riding environment. In this paper, we developed mobile application by using the acquired GPS-based location information that provide safety services for the bike riding as a LBS service. In detail, we have been able to provide a bicycle safety navigation service by using the bluetooth transmission and reception method between Android and Arduino-based devices. As a future work, the safety could be improved if we expand various forms of Arduino sensors. As a result, a service developed in this study will be able to converge ahead to connect into several personalized mobile IoT services.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.4
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• pp.332-340
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• 2013

This paper reports a programming toolkit for implementing localization and navigation of a mobile robot both in real world and simulation. Many of the previous function libraries are difficult to use because of their complexity or lack of usability. The proposed toolkit consist of functions for dead reckoning, motion model, measurement model, and operations on directions or heading angles. The dead reckoning and motion model deals with differential drive robot and bicycle type robot driven by front wheel or rear wheel. The functions can be used for navigation in both real environment and simulation. To prove the feasibility of the toolkit, simulation results are shown along with the results in real environment. It is expected the proposed toolkit is used for test of algorithms for mobile robot navigation such as localization, map building, and obstacle avoidance.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.3
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• pp.99-105
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• 2017

As cities develops, road systems become more and more complicated. These days people depends on navigation systems when walking as well as driving cars. General navigation systems are either installed in cars or exists as smart phone applications. Therefore, it is very difficult to use them while walking or riding bicycles. Moreover, disabled person cannot use them to find his destinations. In this paper, we propose a bracelet navigation system for walkers and disabled people, and describe the design and implementation of such a device. This navigation will help not only walkers and people riding bicycle but also disabled people to actively participate their social activities.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.3
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• pp.421-432
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• 2013

This paper describes implementation of functions for mobile robot localization, which is one of the vital technologies for autonomous navigation of a mobile robot. There are several function libraries for mobile robot navigation. Some of them have limited applicability for practical use since they can be used only for simulation. Our research focuses on development of functions which can be used for localization of indoor robots. The functions implement deadreckoning and motion model of mobile robots, measurement model of range sensors, and frequently used calculations on angular directions. The functions encompass various types of robots and sensors. Also, various types of uncertainties in robot motion and sensor measurements are implemented so that the user can select proper ones for their use. The functions are tested and verified through simulation and experiments.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.727-730
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• 2009

최근 그린 성장산업의 발전과 더불어 이슈화되고 있는 장애인들을 위한 전동휠체어와 일반인들의 자전거가 급격하게 보급되고 발전하고 있는 것에 반하여, 이동수단을 사용할 때 발생할 수 있는 위험으로부터의 대책은 예전과 전혀 다를 바가 없는 상황이라 할 수 있다. 이에 본 연구는 자동차 중심으로 개발되어 있는 네비게이션 기능과 그 서비스에 가장 적합한 도로 및 주변정보 콘텐츠를 전동휠체어와 자전거 중심의 시스템으로 재설계하여 그들을 위험으로부터 최소한의 보호하고 사고를 예방을 할 수 있는 전용 네비게이션을 개발하고자 한다. 본 연구에 의하여 제시된 연구결과가 자전거 사용자와 전동휠체어를 사용하는 장애인들의 생활을 더욱 안전하게하고, Slow-Moving 기기들의 보급 확장에도 도움이 되기를 기대한다.

• Journal of Advanced Navigation Technology
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• v.18 no.1
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• pp.101-106
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• 2014

Smart TV is to form a market of new industries along with the smartphone that appeared in the early 2000s. With the development of IT technology and the emergence of smart phones, user to pursue the application of high satisfaction. The smartphone has to meet the needs of the user in a variety of applications. However, Smart TV which led to a decrease in the development of a member of the application that reflect the needs of the user. Smart TV is popularized, the approach may be used instead of the application of high specification, the smart TV feel to be a smart are required to meet the needs of the user. Therefore in this paper, using the latest IT technology to provide a smart TV applications. This provides a feeling in conjunction as a system of one smart TV, smartphone, the exercise bike like to travel the distance of the actual user. For this reason to use WebOS, HTML5, Web sockets, the technology of Android.