CC2540을 이용한 시각장애인용 길안내 시스템 설계 및 구현

유현호,최병재,Yoo, Hyun-Ho,Choi, Byung-Jae 대한임베디드공학회 2016 대한임베디드공학회논문지 Vol.11 No.1

There are many assistive devices for the visually impaired. They are becoming smart. In this paper, we propose a device that help route guidance for a visually impaired person. It is composed of a smart phone, cane, and hands-free devices. The smart phone helps a route guidance. The cane detects an obstacle and transmits it to the hands-free device. The hands-free device communicates with a visually impaired person. We here present their architecture, signal flow, configuration, and their circuit diagrams.

빅데이터 분석 기법을 이용한 실시간 대중교통 경로 안내 시스템의 설계 및 구현

임종태,복경수,유재수 한국콘텐츠학회 2019 한국콘텐츠학회논문지 Vol.19 No.2

Recently, analysis techniques to extract new meanings using big data analysis and various services using these analysis techniques have been developed. Among them, the transport is one of the most important areas that can be utilized about big data. However, the existing traffic route guidance system can not recommend the optimal traffic route because they use only the traffic information when the user search the route. In this paper, we propose a realtime optimal traffic route guidance system using big data analysis. The proposed system considers the realtime traffic information and results of big data analysis using historical traffic data. And, the proposed system show the warning message to the user when the user need to change the traffic route. 최근 빅데이터 분석을 통해 새로운 정보들을 도출해내기 위한 분석 기법들과 이를 이용한 다양한 서비스들이 개발되고 있다. 그 중에서 빅데이터가 중요하게 활용될 수 있는 분야 중의 하나가 교통 분야이다. 기존 대중교통 안내 서비스의 경우 현재 교통정보를 기준으로 추천하기 때문에 실제로는 최적이 아닌 경로가 추천될 수 있다. 본 논문에서는 빅데이터 분석을 통한 실시간 최적 교통 경로 안내 시스템을 설계하고 구현한다. 설계한 시스템은 실시간 교통정보를 활용함과 동시에 과거 수집된 교통 정보를 분석하여 각 경로들의 교통 상황을 예측하여 경로 이동 계획을 설정해준다. 또한 중간에 교통상황이 급변하여 경로를 수정해야할 필요가 있을 때 사용자에게 알림을 주고 그에 대한 조치를 취할 수 있도록 지원한다.

Representing Navigation Information on Real-time Video in Visual Car Navigation System

Joo, In-Hak,Lee, Seung-Yong,Cho, Seong-Ik The Korean Society of Remote Sensing 2007 大韓遠隔探査學會誌 Vol.23 No.5

Car navigation system is a key application in geographic information system and telematics. A recent trend of car navigation system is using real video captured by camera equipped on the vehicle, because video has more representation power about real world than conventional map. In this paper, we suggest a visual car navigation system that visually represents route guidance. It can improve drivers' understanding about real world by capturing real-time video and displaying navigation information overlaid directly on the video. The system integrates real-time data acquisition, conventional route finding and guidance, computer vision, and augmented reality display. We also designed visual navigation controller, which controls other modules and dynamically determines visual representation methods of navigation information according to current location and driving circumstances. We briefly show implementation of the system.

Representing Navigation Information on Real-time Video in Visual Car Navigation System

In Hak Joo,Seung Yong Lee,Seong Ik Cho 大韓遠隔探査學會 2007 大韓遠隔探査學會誌 Vol.23 No.5

Car navigation system is a key application in geographic information system and telematics. A recent trend of car navigation system is using real video captured by camera equipped on the vehicle, because video has more representation power about real world than conventional map. In this paper, we suggest a visual car navigation system that visually represents route guidance. It can improve drivers` understanding about real world by capturing real-time video and displaying navigation information overlaid directly on the video. The system integrates real-time data acquisition, conventional route finding and guidance, computer vision, and augmented reality display. We also designed visual navigation controller, which controls other modules and dynamically determines visual representation methods of navigation information according to current location and driving circumstances. We briefly show implementation of the system.

도로 주행환경 변화와 핸들종류에 따른 운전자 부하 및 행동특성

전용욱(YongWook Jeon),大門 樹(Tatsuru Daimon) 대한인간공학회 2009 大韓人間工學會誌 Vol.28 No.2

The aim of this study was to evaluate the effects of the driving performance and workload according to changing driving environment and types of steering wheel. Twelve drivers who participated in this study consisted of two groups; six Japanese as the left-lane drivers who was accustomed to driving on left-hand side of the road, and six Europeans, Americans, and Korean as the right-lane drivers who was accustomed to driving on right-hand side of the road. They were asked to operate a driving simulator while using two different types of steering wheel (for the left-hand side driving and the right-hand side driving). During the experiment, a range of data were measured including driving performance, mental workload, and eye movements which were recorded in order to identify the amount of time looking towards the in-vehicle route guidance. Results indicated that the use of the steering wheel by parallel moving led to increase high attentional demand and worse glance behavior to traffic signs for the left-lane drivers. In the case of the right-lane drivers, the effects by changing driving direction were more effective than the types of steering wheel due to their habit or traits.

A Simulation-Based Investigation of an Advanced Traveler Information System

김회경 대한교통학회 2011 대한교통학회지 Vol.29 No.5

More affordable and available cutting-edge technologies (e.g., wireless vehicle communication) are regarded as a possible alternative to the fixed infrastructure-based traffic information system requiring the expensive infrastructure investments and mostly implemented in the uninterrupted freeway network with limited spatial system expansion. This paper develops an advanced decentralized traveler information System (ATIS) using vehicle-to-vehicle (V2V) communication system whose performance (drivers’ travel time savings) are enhanced by three complementary functions (autonomous automatic incident detection algorithm, reliable sample size function, and driver behavior model) and evaluates it in the typical 6X6 urban grid network with non-recurrent traffic state (traffic incident) with the varying key parameters (traffic flow, communication radio range, and penetration ratio), employing the off-the-shelf microscopic simulation model (VISSIM) under the ideal vehicle communication environment. Simulation outputs indicate that as the three key parameters are increased more participating vehicles are involved for traffic data propagation in the less communication groups at the faster data dissemination speed. Also, participating vehicles saved their travel time by dynamically updating the up-to-date traffic states and searching for the new route. Focusing on the travel time difference of (instant) re-routing vehicles, lower traffic flow cases saved more time than higher traffic flow ones. This is because a relatively small number of vehicles in 300vph case re-route during the most system-efficient time period (the early time of the traffic incident) but more vehicles in 514vph case re-route during less system-efficient time period, even after the incident is resolved. Also, normally re-routings on the network-entering links saved more travel time than any other places inside the network except the case where the direct effect of traffic incident triggers vehicle re-routings during the effective incident time period and the location and direction of the incident link determines the spatial distribution of re-routing vehicles.

Development and Evaluation of Advanced Framework of ATIS Model

김회경 한국교통연구원 2011 交通硏究 Vol.18 No.1

Intelligent Transportation System (ITS) is a promising means to mitigate the traffic congestion. Recently, numerous research efforts have been made to develop Advanced Traveler Information System (ATIS) model using V2V communication with more affordable and available wireless communication. Therefore, this paper aims to develop a (basic) ATIS model using V2V communication under the ideal communication environment and enhance its performance with three complementary functions (advanced ATIS using V2V model) and create simulation test bed with off - the - shelf microscopic simulation under non - recurrent traffic state. Also, the acceptable parameter ranges of performance - enhanced functions have been studied through sensitivity analysis with Monte Carlo simulation method. The simulation outputs indicate that ATIS model using V2V communication saved travel time of drivers by guiding participating vehicles to less congested routes. Also,the significant variability of traffic state input data (i.e., link travel time) due to traffic signal results in the difficulty to implement the sample size function. In addition, the sensitivity analysis noticed that parameter values 2 or 3 and 20% or 30% for K and I factors, respectively, showed the best performance as function of the given network size and structure.

Design of Public Transportation Route Guidance System for Wheelchair Users Utilizing Public Data of Seoul City

Geumbi Lee,Humberto Villalta,Seunghyun Kim,Kisu Kim,Jaehyeong Go,Yongjoo Jun,Kwang Sik Kim 한국인터넷방송통신학회 2023 International Journal of Internet, Broadcasting an Vol.15 No.1

The purpose of this study is to design and test a new way of public transportation route guidance system for persons with disabilities, including wheelchair users. The guidance system is smartphone app-based, using, routes that involve disabled-friendly facilities in the vicinity can be searched. A database that contains publicly available data on low-floor bus services, location and extent of disabled-friendly facilities, and suitable subways and stations, was developed for this purpose. The app uses the database to access and query the required information. A pilot study was conducted to test the effectiveness of the guidance system. It was found that the system was able to convey information about the disabled-friendly routes and related guidance information even inside subway stations, effectively. The performance of the system was compared with route guidance services that do not explicitly use data on disabled-friendly services. A notable difference was observed in the travel time estimated by this program and other guidance services. The difference was around 4 to 15 minutes. This is significant savings for persons with disabilities if they use the app and service. The study thus shows that exclusive use of disabled-friendly data in route guidance will bring more benefits for persons with disabilities.

Equilibrium Assignment에 기반한 자율주행차량의 Dynamic Route Guidance system 구축방안

서지영,이선하,Maria Sharlene L. INSIGNE,강성구,김도균 대한교통학회 2020 대한교통학회지 Vol.38 No.1

With the emergence of the Fourth Industrial Revolution, various technologies are being introduced, and among these, interest in the commercialization of Autonomous Vehicles (AV) is increasing. Currently, Autonomous Vehicles (AV) are being researched to build related facilities such as road infrastructure and signal control and V2X so that they can operate in consideration of the surrounding situation to the final destination. In this study, we proposed a dynamic route guidance system (Dynamic Route Guidance system) that allows Autonomous Vehicles (AV) to be assigned appropriate routes for the efficient operation. The optimal route search system considers various parameters necessary for the route search between the departure point and the arrival point (O/D) and determines the traffic situation at regular intervals. The study follows first, a theoretical analysis of various traffic assignment techniques and parameters for applying to Autonomous Vehicles (AV) and systems is carried out. Jeju-island, which has a traffic policy analysis system in terms of management, was selected for Shin-Jeju. This study analyzed the effects before and after the introduction of the optimal route search system using the vehicle characteristics of the Autonomous Vehicle (AV) and the traffic information of the test-bed network using the microscopic simulation model VISSIM. As the routes were guided, the mileage increased, but the voyage time and delay time decreased. Through the improvement effect of the introduction of this system, it suggested the construction method for the introduction and implementation of the system for the commercialization of the Autonomous Vehicle (AV) in the future and the future research direction. 4차 산업혁명 등장과 함께 다양한 기술들이 도입되고 있으며, 이 중 자율주행차량(AV)의 상용화에 대해 크게 관심이 높아지고 있다. 현재 자율주행차량(AV)은 최종 목적지까지 주변상황을 고려하여 운행하도록 도로 인프라와 신호제어 등 관련 시설물 구축과 V2X 관련 다양한 연구가 진행되고 있다. 본 연구에서는 교통운영자 입장에서 자율주행차량(AV)의 효율적인 운영을 위해 교통정보를 활용하여 적정경로를 배정받도록 하는 최적경로 탐색 시스템(Dynamic Route Guidance system)을 제시하였다. 최적경로 탐색 시스템은 출발지/도착지(O/D) 간 주행차량이 경로탐색에 필요한 다양한 파라미터를 고려하고 일정시간 간격으로 교통상황을 판단하여 최적경로로 안내하는 시스템이다. 먼저 자율주행차량(AV) 및 시스템에 적용하기 위한 다양한 통행배정 기법과 파라미터에 대한 알고리즘의 이론적 고찰을 수행하며, 사전 시스템 Test-bed 구현을 위해 교통수요/교통흐름/교통신호/대중교통/운영관리 측면의 교통정책분석 시스템이 구축되어 있는 제주특별자치도 신제주를 대상으로 선정하였다. 본 연구는 Microscopic Simulation model VISSIM을 활용하여 자율주행차량(AV)의 차량특성 및 Test-bed Network의 교통정보를 통한 최적경로 탐색 시스템의 도입 전/후 효과분석을 수행하였으며, 기존 경로에 비해 우회하는 경로를 안내받아 통행거리는 증가하나 통행시간 및 지체시간이 감소한 것으로 분석되었다. 이러한 시스템 도입에 따른 개선효과를 통해 향후 자율주행차량(AV)의 상용화를 위한 시스템 도입 및 구현을 위한 구축방안, 향후 연구방향을 제시하였다.

A New Route Guidance Method Considering Pedestrian Level of Service using Multi-Criteria Decision Making Technique

Joo, Yong-Jin,Kim, Soo-Ho Korea Spatial Information Society 2011 한국공간정보학회지 Vol.19 No.1

The route finding analysis is an essential geo-related decision support tool in a LBS(Location based Services) and previous researches related to route guidance have been mainly focused on route guidances for vehicles. However, due to the recent spread of personal computing devices such as PDA, PMP and smart phone, route guidance for pedestrians have been increasingly in demand. The pedestrian route guidance is different from vehicle route guidance because pedestrians are affected more surrounding environment than vehicles. Therefore, pedestrian path finding needs considerations of factors affecting walking. This paper aimed to extract factors affecting walking and charting the factors for application factors affecting walking to pedestrian path finding. In this paper, we found various factors about environment of road for pedestrian and extract the factors affecting walking. Factors affecting walking consist of 4 categories traffic, sidewalk, network, safety facility. We calculated weights about each factor using analytic hierarchy process (AHP). Based on weights we calculated scores about each factor's attribute. The weight is maximum score of factor. These scores of factor are used to optimal pedestrian path finding as path finding cost with distance, accessibility.