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Improvement of a Joystick Controller for Electric Wheelchair User

Modern Mechanical Engineering 2015年第4期5卷 132-138页

作者： Masatomo Shibata Chao Zhang Takakazu Ishimatsu Motohiro Tanaka joel palomino Nagasaki University Graduate School of Engineering Nagasaki University Nagasaki Japan Department of Transportation Mechanics Kurume Institute of Technology Kurume Japan Pontificia Universidad Catolica del Peru Lima Peru

The electric wheelchair is an effective machine for people with lower limb disability. The user controls the wheelchair by a joystick that helps the user to navigate the wheelchair along the desired path. Suppose the user on the wheelchair wants to operate the computer for his jobs or enjoyment, it is preferable for the user to be able to operate the computer without transferring from the wheelchair to a computer desk. Of course, some computer input devices are available for wheelchairs. One reasonable idea is to use the familiar joystick on the wheelchair as a computer input device. In this paper a joystick controller is proposed, which enables the user on the wheelchair to operate the computer settled on a nearby table. The proposed joystick controller can be achieved by mounting the sensor unit on the joystick without any modification of the conventional wheelchair controller. The principle of the sensing unit is to measure the inclination angle and the direction of the joystick with an acceleration and gyro sensor. Then the sensing unit sends the control data to the computer via an infrared or wireless signal. This proposal is based on a request done by the wheelchair users.

关键词： Wheelchair Joystick Communication Computer Interface

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An Environmental Control System for ALS Patient Using Finger Movement

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Modern Mechanical Engineering 2015年第4期5卷 122-131页

作者： Chao Zhang Masatomo Shibata Keisuke Takashima Jiangli Yu Takakazu Ishimatsu joel palomino Nagasaki University Graduate School of Engineering Nagasaki University Nagasaki Japan Pontificia Universidad Catolica del Peru

ALS is a degenerative disease which affects the patients muscular activity in feet and hands, leading to a bed ridden status. The loss of independency affects their will to live, for this reason an environmental control system to handle the home appliances and make telephone calls is proposed. The system uses a tablet as a visual human interface so that the patient can select the desired appliance by selecting the corresponding item on the tablet screen. Based on the remaining patient’s abilities an input device that detects slight finger movement is proposed. In this paper three types of input devices are considered and their performance is evaluated by four ALS patients. Their comments about the usage of the devices are discussed in this work. Finally the environmental control was implemented on an ALS patient home and their impressions were satisfactory for the patients, relatives and care-givers.

关键词： Environmental Control ALS patient Input Device Touch Sensor Pressure Sensor

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