• Title/Summary/Keyword: Wheelchair user

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Implementation of Motorized Wheelchair using Speaker Independent Voice Recognition Chip and Wireless Microphone (화자 독립 방식의 음성 인식 칩 및 무선 마이크를 이용한 전동 휄체어의 구현)

  • Song, Byung-Seop;Lee, Jung-Hyun;Park, Jung-Jae;Park, Hee-Joon;Kim, Myoung-Nam
    • Journal of Sensor Science and Technology
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    • v.13 no.1
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    • pp.20-26
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    • 2004
  • For the disabled persons who can't use their limbs, motorized wheelchair that is activated by voice recognition module employing speaker independent method, was implemented. The wireless voice transfer device was designed and employed for the user convenience. And the wheelchair was designed to operate using voice and keypad by selection of the user because they can manipulate it using keypad if necessary. The speaker independent method was used as the voice recognition module in order that anyone can manipulate the wheelchair in case of assistance. Using the implemented wheelchair, performance and motion of the system was examined and it has over than 97% of voice recognition rate and proper movements.

Double Leaves Type Wheelchair Ramp for Rolling Stock (철도차량용 Double Leaves Type Wheelchair Ramp)

  • Heo, Sung-Kyoo;Son, Dong-Jin
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.2653-2660
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    • 2011
  • Facilities for disabled person are currently required for rolling stock and its requirements are increased. Researching and development to meet these requirements must be necessary. One of them, ramp between platform and train for wheelchair user was developed and applied in real project, the case is described as per the result. The main contents of this paper is for double leaves type wheelchair ramp development operated by manual. This ramp is fixed at floor area of interior with locking device. So operating is allowed for authorized person only. Beside of this, brief comparison with other types will be mentioned.

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Autonomous Wheelchair System Using Gaze Recognition (시선 인식을 이용한 자율 주행 휠체어 시스템)

  • Kim, Tae-Ui;Lee, Sang-Yoon;Kwon, Kyung-Su;Park, Se-Hyun
    • Journal of Korea Society of Industrial Information Systems
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    • v.14 no.4
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    • pp.91-100
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    • 2009
  • In this paper, we propose autonomous intelligent wheelchair system which recognize the commands using the gaze recognition and avoid the detected obstacles by sensing the distance through range sensors on the way to driving. The user's commands are recognized by the gaze recognizer which use a centroid of eye pupil and two reflection points extracted using a camera with infrared filter and two infrared LEDs. These are used to control the wheelchair through the user interface. Then wheelchair system detects the obstacles using 10 ultrasonic sensors and assists that it avoid collision with obstacles. The proposed intelligent wheelchair system consists of gaze recognizor, autonomous driving module, sensor control board and motor control board. The gaze recognizer cognize user's commands through user interface, then the wheelchair is controled by the motor control board using recognized commands. Thereafter obstacle information detected by ultrasonic sensors is transferred to the sensor control board, and this transferred to the autonomous driving module. In the autonomous driving module, the obstacles are detected. For generating commands to avoid these obstacles, there are transferred to the motor control board. The experimental results confirmed that the proposed system can improve the efficiency of obstacle avoidance and provide the convenient user interface to user.

A Study on Proposition of The Assisting Mechanism for Wheelchair Transfer for Car (차량용 휠체어 이송을 위한 보조메커니즘의 제안에 관한 연구)

  • Lim, K.;Kim, Y.S.;Yang, S.Y.
    • 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.

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Research of Customized Electric Wheelchair Control System using NFC on Mobile Device Environment (모바일 디바이스 환경 기반의 NFC를 이용한 사용자 맞춤형 전동 휠체어 제어 시스템 연구)

  • Park, Sanghyun;Kim, Jinsul
    • Smart Media Journal
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    • v.4 no.2
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    • pp.17-25
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    • 2015
  • In this paper proposes an idea for using NFC(Near Field Communication) on smalt mobile devices, you can easily control the electric wheelchair system. In this system with previous researches controlled a power wheelchair in a mobile device using Bluetooth communication, the board communicates with the integrated control of the wheelchair. With smart mobile devices, the wheelchair control board integrating the signal generated by checking real time so that the user can easily monitor the state of the wheelchair. Users are using smalt mobile devices, the wheelchair can be controlled easily, and the setting at any time according to the state of the individual and can be used. HEX format control is directly in hardware, allowing analysis was read, the user settings are typically used to match cards which support NFC technology such as bus card for registration, storing the selected information and enable read and were applicable. By applying this system, wheelchairs oriented aids disabled and older people able to access to provide with stability.

A Study on Welfare Vehicles for the User's of Wheelchair (휠체어 사용자를 위한 복지차량 연구-양산 차에 대한 휠체어 사용 탑승을 중심으로-)

  • 이호숭
    • Archives of design research
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    • no.18
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    • pp.123-134
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    • 1996
  • For handicapped person who have a handicap in moving, vehicles are indispensible, especially in the viewpoint of handicapped person's participation for social life by rehabilitation, the freedom of movement equaling to nonnal person is a important factor for improving the quality in being complete growth.In the purposese of positively social participation of handicapped person, this study investigated the general problems about using a means of transportation in the users of wheelchair and for solving these problems and approached, in the viewpoint of styling, vehicles were considered from character of self-supporting in getting on and off a car. For that first, this study was progressed by suggesting invigorating convenience facilities in already established vehicles for the user of a wheelchair and the part of moulding of modified vehicles in a structure. Moreover, making a selection of domestic vehicles arbitrarily, analyzing a internal structure of a boarding of a wheelchair, and suggesting the modified model of vehicles by the sketch.

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Development of the Driving-will Control System for a Power-assisted Electric Wheelchair (힘 보조형 전동 휠체어를 위한 구동 의지 제어 시스템 개발)

  • Kong, Jung-Shik;Lee, Bo-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.3
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    • pp.1296-1301
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    • 2012
  • This paper deals with development of the driving-will control system in power-assisted electric wheelchair. Nowadays, population of elderly people has been increased rapidly, and also an electric wheelchair has been considered as the device for the elderly. Especially, power-assisted electric wheelchair can overcome problems that a conventional electric wheelchair holds, such as lack of movement of wheelchair user. In this paper, we propose the sensors system to measure the driving-will force and perform the control action for a power-assisted electric wheelchair. And motion performance of the proposed system is verified through the experiment.

Wheelchair Usage and Satisfaction Survey of Elderly Patients (노인 환자들의 휠체어 사용 실태와 만족도 조사 연구)

  • Park, S.H.;Shin, J.I.
    • Journal of rehabilitation welfare engineering & assistive technology
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    • v.9 no.4
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    • pp.257-263
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    • 2015
  • The purpose of this study was to survey the elderly patients through Basic information, Problems Wheelchair, Wheelchair Satisfaction, Usage and Requirements. The meaning of purpose is identify the problems and difficulties of wheelchair use in geriatric patients and an alternative for the correct use of wheelchairs elderly patients. The study investigated through questionnaires. That used questionnaires to modified to Gu Hyeon-Mo questionnaire (2005) and Quebec User Evaluation of Satisfaction with assistive Technology 2.0. 120 of 150 questionnaires were collected and one of them is excluded. Analysis results suggest the following. It was often feel joint pain results from physical damage. In addition when you use a wheelchair it was often feel discomfort in lower back and pelvis. And it feels uncomfortable when moving the tilt. Wheelchair satisfaction of the participants responded to the most 'Normal'. Results of the wheelchair operation ability is as follows. In the case of manual wheelchairs was feeling the difficulty to cross the threshold, Wheel lying, Stairs usage. Also In the case of an electric wheelchair was feeling the difficulty to use Tilt and Decline, Separate from the motor, and Replacement battery. In conclusion, To reduce of back pain and hip joints of elderly patients need to modify design and appearance of the wheelchair. In a later study will find to reduce discomfort and to improve satisfaction of the elderly who use wheelchairs. It will have to periodically examine the usage and satisfaction with them.

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The Development of EMG-based Powered Wheelchair Controller for Users with High-level Spinal Cord Injury using a Proportional Control Scheme (중증 장애인을 위한 근전도 기반 비례제어 방식의 전동 휠체어 제어기 개발)

  • Song, Jae-Hoon;Han, Jeong-Su;Oh, Young-Joon;Lee, He-Young;Bien, Zeung-Nam
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.6-8
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    • 2004
  • The objective of this paper is to develop a powered wheelchair controller based on EMG for users with high-level spinal cord injury using a proportional control scheme. An advantage of EMG is relative convenience of acquisition by a surface electrode to users. Direction information can be easily extracted from two EMG channels and force information can be acquired by proportional relationship between the amplitude of EMG and user's power, respectively. Pattern classification algorithm is a threshold method with a supervised learning process. Furthermore, the emergency situation can be avoided using an interrupt function. We evaluated the performance of powered wheelchair controller by navigating a pre-defined path with three non-handicapped people. The results show the feasibility of EMG as an input interface for powered wheelchair and other devices for the seriously disabled.

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A Method for Identifying Human-generated Forces during an Extensor Thrust

  • Hong Seong-Wook;Patrangenaru Vlad;Singhose William;Sprigle Stephen
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.3
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    • pp.66-71
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    • 2006
  • Some wheelchair users with neuromuscular disorders experience involuntary extensor thrusts, which may cause injuries via impact with the wheelchair, cause the user to slide out of the wheelchair seat, and damage the wheelchair. Knowledge of the human-generated forces during an extensor thrust is of great importance in devising safer, more comfortable wheelchairs. This paper presents an efficient method for identifying human-generated forces during an extensor thrust. We used an inverse dynamic approach with a three-link human body model and a system for measuring human body motion. We developed an experimental system that determines the angular motion of each human body segment and the force at the footrest, which was used to overcome the mathematical indeterminacy of the problem. The proposed method was validated experimentally, illustrating the force-identification process during an extensor thrust.