• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.34 no.3
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• pp.273-282
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• 2016

There has been growing social interest recently in the movement rights of people with reduced mobility. However, it simply eliminates the temporary inconvenience of walking of people with reduced mobility because it focuses only on supply of institutional facilities. Therefore, we look forward to improving movement welfare by proposing an optimized path finding algorithm for people with reduced mobility that takes into consideration physical elements affecting their movement, such as slope, steps etc. We selected Walking barrier factor by analyzing previous studies and calculated the relative importance of Walking barrier factors using an Analytic Hierarchy Process(AHP). Next, through the fuzzy system, the Walking disturbance level of link, which integrates the weights of Walking barrier factors and the attributes of each link, is derived. Then, Walking path cost that takes into consideration the ‘length’ factors is calculated and an optimized path for people with reduced mobility is searched using Dijkstra’s Algorithm. Nineteen different paths were searched and we confirmed that the derived paths are meaningful in terms of improving the mobility of people with reduced mobility by conducting a field test. We look forward to improving movement welfare by providing a navigation service using the path finding algorithm proposed in this study.

• Proceedings of the KIEE Conference
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• 2008.10b
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• pp.377-378
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• 2008

본 논문은 시각 장애인들의 보행 시 앞을 볼 수 없는 점을 바탕으로 시각을 음성으로 대체하여 장애 물체가 발생하였을 경우 안전을 위하여 위험 요소를 사전에 경보하여 알려주도록 구현하였다. 시각 장애인들이 보행 시 장애 물체가 나타났을 경우 이를 입체 변위 센서인 초음파 센서로 장애물의 위치를 측정하고 측정된 거리 데이터를 근거리 무선통신인 블루투스를 동하여 송 수신하여 사용자인 시각 장애인에게 소형 스피커를 통하여 음성으로 알려주고 경고함으로써 위험 요소를 사전에 대처할 수 있도록 설계를 하였다. 초음파 입체 변위 센서를 이용하여 측정된 거리를 실시간 자동 거리 측정이 가능하도록 시스템을 구현하고 이 데이터를 근거리 무선 통신으로 송 수신하며 수신 모듈이 데이터를 음성으로 전환하여 실시간 자동 경보 시스템을 구축함으로써 보행 장애 위험물 감지가 보다 효율적으로 이루어지고 디지털화되게 시스템을 개선하였다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.40 no.2
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• pp.119-133
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• 2022

Due to the improvement of surveying, mapping and communication techniques, various apps for road direction guides and vehicle navigations have been developed. Although such a development has impacted on walking and driving, there is a limit to improving the daily convenience of the socially impaired people. This is mainly due to the fact that the software have been developed for normal pedestrians and drivers. Therefore, visually impaired people still have problems with the confusion of direction and/or non-provision of risk factors in walking. This study aimed to propose a scheme which constructs data for mobility-impaired or traffic-impaired people based on various geospatial information. The factors and components related to walking for the visually impaired are selected by geospatial data and a walking route guidance network that can be applied to a commercial software. As a result, it was confirmed that road direction guidance would be possible if additional contents, such as braille blocks (dotted/linear), sound signals, bus stops, and bollards are secured. In addition, an initial version of the application software was implemented based on the suggested data model and its usefulness was evaluated to a visually impaired person. To advance the stability of the service in walking for the visually impaired people, various geospatial data obtained by multiple institutes are necessary to be combined, and various sensors and voice technologies are required to be connected and utilized through ICT (Information and Communications Technologies) technology in near future.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1531-1532
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• 2008

본 논문은 앞을 볼 수 없는 시각 장애인의 보행 시 장애물에 대한 안전을 고려한 시스템으로 보행 시 전방에 보행 장애 물체가 나타날 경우 초음파 센서가 장애물의 위치거리를 측정하고 측정된 거리 데이터를 근거리 무선통신을 통해 송.수신하여 이를 최종적으로 사용자인 시각 장애인에게 음성으로 사전 경고함으로써 발생할 수 있는 위험 요소를 대처하는데 기여할 수 있도록 설계하였다. 설계된 시스템은 IT관련 기술을 활용함으로써 휴먼 IT기술을 구현하고자 하였다.

• Journal of the Korea Society of Computer and Information
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• v.19 no.11
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• pp.167-173
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• 2014

A white cane is used by many people who are blind or visually impaired. The studies and developments in the field of smart electronic white cane have been progressed to improve walking safety of the visually handicapped person. In this paper, we describe a situation-awareness white cane which support and guide walking of the visually handicapped person by giving information of surrounding situation through connection of a white cane and a mobile device. There are easily accessible buttons in the situation-awareness white cane. These buttons is connected with the mobile device by blue-tooth, so by pushing these buttons, the visually handicapped person can receive sound-guidance. As a result, the visually handicapped person can walk more safely by getting more information of situation.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.41 no.1
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• pp.65-74
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• 2021

This study empirically analyzes the effect of pedestrians' personal and household characteristics and accessibility to public facilities on a walking safety satisfaction (WSS) level. The aim is to find ways to improve vulnerable pedestrians' WSS level and contribute to the creation of an inclusive urban environment. As a result of the analysis, age and gender variables were important for elderly people, and education was an important factor for disabled people. The WSS level was impacted by the factors of single-person households, income, and residential areas. In the case of accessibility to public facilities, the greater the satisfaction with accessibility to public institutions, urban parks and green areas, and public transport, the greater the WSS for the elderly and the disabled. And, the greater the satisfaction with accessibility to commercial facilities, the greater the WSS was for the elderly's WSS. However, the satisfaction with access to medical facilities was the opposite in the case of the elderly.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.898-901
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• 2010

본 연구는 만성 뇌졸중 환자를 대상으로 시각리듬자극(RVS)을 이용한 보행 운동을 적용하여 보행과 고유수용성감각에 미치는 효과를 알아보고자 하였다. 뇌졸중으로 6개월 이상 장애를 가진 21명이 연구에 참여하였고 실험군 10명과 대조군 11명으로 나누었다. 대조군은 14m의 보행로가 확보된 공간에서 준비운도 5분, 보행운동 20분, 정리운동 5분 씩 주 3회, 4주간 12회을 실시하였고, 실험군은 대조군의 운동프로그램과 같은 조건에서 보행운동시 시각리듬자극(RVS)을 추가적으로 적용하였다. 운동 전과 후에 보행과 고유수용성감각을 측정하여 효과를 비교하였다. 통계처리 방법으로 실험 전 후 차이를 검증하기 위하여 대응표본 t 검정을 실시하였고 대조군과의 차이 검증을 위하여 독립표본 t 검정을 실시하였다. 모든 통계적 유의수준은 0.05로 하였다. 본 연구의 결과 시각리듬자극(RVS)이 적용된 실험군에서 보행속도와 분속수, TUG 시간이 유의하게 증가하였고(p<.05), 고유수용성감각이 유의하게 증가하였다(p<.05). 결론적으로 시각리듬자극(RVS)을 이용한 보행운동이 만성 뇌졸중 환자의 보행과 고유수용성감각에 효과가 있는 것으로 나타났다. 향후 만성 뇌졸중 환자에게 음악적 요소인 시각리듬자극 (RVS)이 정신적 육체적 기능을 상실한 뇌졸중 환자의 재활치료 프로그램에 적용하는 연구가 필요할 것으로 기대되어진다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2011.04a
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• pp.219-226
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• 2011

최근 대형화 고층화 복합화 등 점차 발전하는 건축물의 피난 안전성을 확보하기 위하여 성능위주 중심의 피난안전계획이 이루어지고 있다. 그러나 관련 법규의 세부적 기준이 없어 국외 기준에 기반하여 피난안전계획이 진행되고 있다. 특히 신체적 약자로 대변되는 재해약자는 전체 인구 중 17%를 차지하여 점차 증가되는 추세로 그 필요성이 강조된다. 따라서 본 논문에서는 재해약자의 피난 안전성 확보를 위하여 재해약자의 연구 문헌을 검토한 결과 신체적인 장애보다는 장애에 따른 이동 형태에 따라 재해약자의 보행형태를 구분하여 크게 도보를 이용한 자력 이동과 보조기구를 이용한 조력 이동, 보조기구를 이용한 자력 이동으로 구분할 수 있었으며 연령과 장애 모두 영향 인자로 작용하였으며 연령이 높아질수록, 자력 이동이 불편할수록 이동 속도가 저하되는 것으로 분석되었다. 향후 국내의 현실을 반영하여 조사된 내용을 기반으로 실험적 연구가 필요하다.

• Journal of the Korea Convergence Society
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• v.12 no.2
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• pp.201-213
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• 2021

Recently, personal mobility has been spreading and using increasing, but the pedestrian environment is getting worse and accidents are also rapidly increasing. Therefore, this study conducts a status survey related to the elements of pedestrian disturbances in personal mobility and identifies the problems. The following measures are presented to improve the pedestrian environment for the mobility handicapped through expert opinion surveys. The movement of individual mobility means in the walking space is prohibited, and the speed limit shall be stipulated to enable the mobility handicapped to walk safely and conveniently. Parking spaces will have to create obstacle zones in the parking area next to the roadway or at the border of sidewalks and roads, and regulations are needed to collect illegally parked vehicles. It is necessary to switch from the existing automobile-oriented road to the road structure considering the use of low and medium-speed vehicles.

• Design Convergence Study
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• v.17 no.3
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• pp.55-70
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• 2018

This study was conducted as a part of long-term project on the development of a set of design guidelines for a crutch as mobility aids for the handicapped in the lower extremity and the suggestion a practical solution for a crutch design. The purpose of this study is to develop a design of a crutch and a set of prototypes that reflects the characteristics of crutch-gait and has a realistic possibility for mass production-based industry. TOGO, a axillary crutch as the result of this study, shows a number of characteristics distinguished from ordinary crutches. These are (1)Minimize the shock associated with planting of the crutch tips by improving the form and structure of crutch tip and axillary pad, (2)Ergonomically designed crutch in accordance with users' body movement while walking on crutches, (3)Easy length control to maximize mobility and maneuverability by changing the cross section of the crutch revolutionary, (4)Minimize possibilities of safety hazards, and (5)Attractive shape of the crutch to keep user self-esteem. The revolutionary crutch derived from this study results has been patented, and the company is seeking to mass-produce and find ways to commercialize it after reviewing the potential problems that may arise in the mass production environment.