• Journal of Korea Society of Industrial Information Systems
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• v.17 no.7
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• pp.25-33
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• 2012

This paper deals with the development of automatic docking system for the detachable mobile seat(DMS) of a vehicle for the handicapped people who are unable to ride in a car by oneself. Although such vehicles for the handicapped already exist, there is a need for a vehicle with improved docking method for convenience. This paper presents an automatic docking system using two ultrasonic sensors. In order to identify the precise location of the mobile seat in front of the vehicle door, the capability of ultrasonic sensor for detecting the part edge is analyzed and mathematical modeling is performed to measure the exact location of the side edge. And also, this paper presents an automatic docking method using this sensor system and the car lift which is provided in the inside of the car.

• 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 rehabilitation welfare engineering & assistive technology
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• v.10 no.2
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• pp.133-139
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• 2016

An electric wheelchair is a assistive device to maneuver on the ground. Tip-over of an electric wheelchair is increasing every year. Dynamic stability metric test item in KS P 7176 has not ensured safety of electric wheelchair on the slope. This study presents design the foldable electric wheelchair that can load in the car and analysis of tip-over measurement which is easily computed for electric wheelchair. Wheelchair frame is designed with a four-bar link mechanism for a foldable structure, and seat module, battery and power driving module can be separated. This analysis is performed during a maneuver on the ground by force-moment stability metric. Several elements, center of gravity position, rotational radius and acceleration, were evaluated how to affect stability metric. This stability metric can reduce tip-over of wheelchair and provide a clue to make of dynamic stability test item.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.571-577
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• 2019

This study examined the usability of express buses for wheelchair users to identify the effectiveness, efficiency and satisfaction of wheelchair boarding systems. The usability of 11 manual wheelchair users and nine powered wheelchair users was evaluated using the following three scenarios: boarding the wheelchair accessible bus, moving inside, and alighting the bus. The results showed that 20 wheelchair users completed three scenarios, which was distributed between 0.33 and 1.36 in the difficulty rating scale of the efficiency. The task effort of the efficiency was measured from 8.36 to 11.78. The acceptability of the satisfaction was distributed between 1.00 and 2.00, and the system usability scale was measured in an acceptable boundary of the C grade at 70.7 points with manual wheelchair users and a B grade at 73.1 points with powered wheelchair users. This study has academic significance because it provides basic evidence for accessibility, securing the right to movement and research methods of public transportation for people with disabilities. To improve the quality level of usability in the future, more study with a larger number of research participants and various wheelchair types should be studied.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.6 no.1
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• pp.9-15
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• 2012

In this paper, the feasibility of a wheelchair carrier for the disabled own driver is checked kinematically to fit one of current domestic vans by drawings, design. A van with 9 passengers is selected for the modification to attach the wheelchair carrier and test the operation in real situation. The trajectory and motion process are studied to protect from the interception with outside body of van, and the conceptual design is proceeded kinematically. For the detail design, the stress analysis and driving mechanism with power supply must be studied and selected basically.

• Journal of The Korea Institute of Healthcare Architecture
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• v.26 no.1
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• pp.17-27
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• 2020

Purpose: The purpose of this study is to identify the difference in toilet approach way by wheelchair users according to the direction of the door and to suggest the layout of the toilet rooms most accessible to the wheelchair users. Methods: Survey to wheelchair users about approach to toilet have been conducted for the data collection. 90 answers have been analyzed statistically by SPSS 19.0 program. Results: The conclusions of this study are as follows. Firstly, spinal cord disorders prefer diagonal approach and lateral approach to the toilet, but brain lesions prefer diagonal approach and frontal approach to toilet. Secondly, the manual wheelchair users prefer the diagonal approach and the lateral approach to the toilet, and the electric wheelchair users has a different approach way to the toillet depending on the direction of the door. Finally, the layout of accessible toilets have to be designed for the diagonal approach to toilet, which is most preferred by wheelchair users. Implications: The toilet approach varies according to the disability types and the wheelchair types. Therefore, the size of accessible toilets should be larger than now considering the access of variety wheelchair users.

• Journal of the Society of Disaster Information
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• v.20 no.1
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• pp.69-81
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• 2024

Purpose: Recently, there has been a movement to guarantee the right to watch sports for the disabled. However, the sports stadium is designed without considering the wheelchair users, so the right to move in the stadium is not secured. Restrictions on the movement of the disabled make the evacuation vulnerable in an emergency. This study aims to develop a plan to ensure the safety of movement and evacuation of wheelchair users by conducting simulations targeting indoor sports stadiums. Method: The simulation was performed by constructing a scenario with the shape of the stands as a variable. The effect of the installation of wheelchair seats on evacuation was confirmed. Result: The results according to whether wheelchair seats are installed, the evacuation route of wheelchair movement, and whether wheelchair seats are separately arranged were compared. The impact of wheelchair seat installation on evacuation and its characteristics were derived. As a result, upward and separation seat was the most vulnerable to evacuation. Conclusion: A plan to secure evacuation performance was derived for the top floors of upward and separation seat. It is judged that the content can be use as a way to secure the safety of movement and evacuation of the disabled in sports stadiums.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.7 no.1
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• pp.13-19
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• 2013

The aim of this study was to investigate difference of the muscle activation patterns of the upper body during wheelchair cycle ramps ascent of different slopes for disabled with spinal cord injury. Three subjects who is disabled with spinal cord injury participated in this study. Surface electromyography (EMG) data (reaction time [RT], onset-offset time, and peak value of muscle activation) were collected biceps, triceps, upper trapezius, anterior deltoid, latissimus dorsi, and upper rectus abdominal muscles during wheelchair cycle ramps ascent ($0^{\circ}$, $3^{\circ}$, and $6^{\circ}$). For latissimus dorsi muscle, RT and peak value of muscle activation was were increased and offset time was delayed as the slope increased (p < 0.05). These results indicate that wheelchair cycle ramps ascent might cause excessive overuse of latissimus dorsi muscle.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.7
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• pp.153-161
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• 2015

In the present study, as part of the technology development (Quality of Life Technology, QoLT) to improve the socio-economic status of people with disabilities as an extension of these studies, we propose the development of the smart wheelchair system and navigation technology for stable and safe driving in various environments. For the disabled and the elderly make driving easy and convenient with manual/autonomous driving condition, we firstly develop the user-oriented smart wheelchair system with optimized sensors for environment recognition, and then we propose a navigation framework of a hierarchical structure to ensure real-time response, as well as driving stability when traveling to various environmental changes, and to enable a more efficient operation. From the result of several independent experiments, we ensure efficiency and safety of smart wheelchair and its navigation system.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.411-414
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• 2014

복지 정책의 일환으로 거동이 불편한 고령자와 장애인에게 전동 휠체어의 보급이 늘어나고 있다. 그러나 사용의 편리성에 비해 유지관리가 매우 불편하다는 사용자들의 불만이 많이 제기되고 있다. 특히 전동 휠체어의 배터리의 충전 및 정비 운영관리 문제와, 현재 야외에서의 휠체어가 운행하는데 도로상황이 좋지 않아 많은 위험성을 내포하고 있다. 이에 휠체어 및 위치와 같은 주위 상황을 실시간으로 모니터링하여 위험 상황이 발생시 즉각적인 대처가 가능하도록 하는 시스템이 필요하다. 본 논문에서는 이러한 불편을 미연에 방지하고 전동 휠체어의 효율적인 관리가 가능한 배터리 및 위치정보를 실시간 모니터링하는 시스템을 제안한다.