• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.10
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• pp.1109-1116
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• 2014

The wheelchair mechanism for a car that is proposed in this study primarily consists of a transfer mechanism and storage mechanism. The wheelchair transfer mechanism consists of a manipulator installed in the roof of a car, and performs the function of transferring the wheelchair from the driver's seat to the trunk. The wheelchair storage mechanism consists of a lifting hoist installed in the trunk of car, and performs the function of storing the transferred wheelchair in the trunk and safely fastening it in place. This study analyzed and reviewed various manipulators, including a vertical type, Scara type, and telescopic type, with the goal of selecting the best type of manipulator for the wheelchair transfer mechanism. The telescopic type was selected and applied because of its good load support and storage capabilities. In addition, with regard to the wheelchair storage mechanism, a slide hoist type that used a slide rail and lift wire and a rotating link hoist type that used a rotating mechanism consisting of a worm gear and link were analyzed and reviewed. The slide hoist type was selected and applied because it had an advantage in relation to trunk space utilization. This study proposed a wheelchair transfer mechanism for a car to support a conventional wheelchair user's movements, and in order to conform to the structure of a domestic welfare car for the disabled.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.8 no.4
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• pp.251-258
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• 2014

A wheelchair is a typical mobility aid for the physically disabled or the old and the weak, and is the most commonly used rehabilitation aid. In general, most of users of manual wheelchair have difficulty though vocational rehabilitation and independent living is possible. The reason is that long-distance movement is always accompanied with wheelchair transfer problem because a wheelchair is used as direct means of transport. Hence, the wheelchair transfer problem should be first solved in order that a wheelchair user can independently live. Therefore, this study examined and analyzed the domestic and overseas launched products and patented technologies of wheelchair transfer system for vehicle, and proposed a wheelchair transfer mechanism of a new system for vehicle. This study proposed a wheelchair transfer mechanism for vehicle in order to remove the disadvantage of wheelchair transfer system for vehicle to support the conventional wheelchair user's movement, and in order to conform with the structure of domestic welfare vehicle for the disabled. Because a difference between storage space installed in the roof of vehicle and storage space for leisure, which is generally utilized, gets to disappear by applying this proposed mechanism, popularity among users can be increased. And storage space that has become smaller like this will be capable of decreasing the disadvantage of air resistance in traveling. Besides, because of getting to conform with the structure of welfare vehicle, restrictions on the application range will disappear from small sedan to SUV. Therefore, users can have more choices.

• 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.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.4
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• pp.1-8
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• 2019

In the rapidly aging society, the number of wheelchair users is increasing steadily. On the other hand, it is almost impossible for a disabled person using a wheelchair to use express buses. Therefore, it is necessary to develop an express bus that can secure the rights of wheelchair users. For these special types of express buses, it is required to develop a special entrance and lift system. The development of a wheelchair entrance system for the express buses requires design modification, retrofit, and reinforcement of the bus frame. This study evaluated the structural integrity of an entrance system for wheelchair users using a finite element method. Torsional stiffness and modal analysis were performed through structural analysis. Through sensitivity analysis, optimization was performed to reduce the weight of the frame. These results on the wheelchair entrance system are expected to be utilized in the vehicle modification and welfare industries.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.1
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• pp.80-85
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• 2011

This paper presents the design of the power-assisted controller for the in-wheel type smart wheelchair by using torque estimation that is predicted by relationship between input voltage and output wheel angular velocity. Nowadays, interest of the moving assistant aids is increased according to the increase in population of the elderly and the handicapped person. However some of the moving assistant aids have problems. For example, manual wheelchair has difficulty moving at the slope, because users lack the muscular strength of their arm. In electric wheelchair case, users should be weak by being decreased muscles of upper body. To overcome these problems, power-assisted electric wheelchair are proposed. Most of the power-assisted electric wheelchair have the special rims that can measure the user's power. In here, the rims have to be designed to install the sensors to measure user's power. In this paper, we don't design the rim to measure the man power. To predict the man power, we propose a control algorithm of the in-wheeled electric wheelchair by using torque estimation from the wheel. First, we measure the wheel velocity and voltage at the in-wheel electric wheelchair. And then we extract driving will forces by using proposed mathematical model. Also they are applied at the controller as the control input, we verify to be able to control in-wheel type smart wheelchair by using simulation.

• The KIPS Transactions:PartA
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• v.17A no.1
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• pp.19-26
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• 2010

As standard of living is higher and aging society is coming, it is needed to develop transportation that is easy to use for weak person. To comply with the demands, it is started to make Bi-modal Tram that is on KRRI(Korea Railroad Research Institute)'s hands. This tram has to have good accessibility like bus, be low level from ground like subway, and park accurately so wheel chair's or passenger's foot can't fall into the gap. But Bi-modal Tram have long length, so it need development of All Wheel Steering System. The Bi-modal Tram that have all wheel steering system steer not only the first axle but also the second and third axle from the first axle or articulation angle, and velocity, and so on. At this study, we discuss AWS ECU's development process.