Design and implementation of a test setup for electric mobility scooter for the disabled
TL;DR: In this article, a test setup was designed for three and/or four-wheeled electric mobility scooter models used by disabled or old people, which was composed of a test platform that enables measuring the performance of the scooter.
Abstract: In this study, a test setup was designed for three- and/or four-wheeled electric mobility scooter models used by disabled or old people. This system is composed of a test platform that enables meas...
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01 Oct 2017
TL;DR: In this article, the authors describe the user's mechanical vibration and shock while riding the electric wheelchair on the different road conditions and investigate the relevance between the comfort of wheelchair user and the vibration.
Abstract: This paper describes user's mechanical vibration and shock while riding the electric wheelchair on the different road conditions. We conduct experiments for measurement of 9-Axis data by using the 9-Axis sensor implemented on the actual electric wheelchair. Then, we investigate the relevance between the comfort of wheelchair user and the vibration. The vibration characteristics of the human body and their effects are discussed.
3 citations
TL;DR: In this paper , the effect of road slope on the electrical and mechanical parameters of a disabled vehicle and regenerative braking was investigated on a 4 wheel disabled vehicle driven by a PMDC motor.
Abstract: In this study, the effect of road slope on the electrical and mechanical parameters of a disabled vehicle and regenerative braking was investigated on a 4 wheel disabled vehicle driven by a permanent magnet direct current (PMDC) motor. For this purpose, the test system, which was designed by the authors in order to test such vehicles in a laboratory environment, was developed in a way that allows the vehicle to be tested in external environments. This test system consists of a data acquisition card (DAC), related sensors, and an interface prepared in the C# program. Using the DAC, currents, voltages, speed, road slope, and temperatures were measured instantaneously during the test process and then transferred to the computer instantly. Using these data, the motor's speed, the motor's torque, the motor's shaft power, the yields of the motor and the driver, the vehicle's instantaneous speed, and the total covered distance were calculated during the experiment in real-time by the interface. At the same time, these data were graphed and saved. Tests were carried out on roads with a positive and negative slope. Finally, the data obtained from these tests were analyzed and the alterations in the electrical and mechanical parameters of the disabled vehicle depending on the road slope were clearly demonstrated by numerical data.
TL;DR: In this article , an axle-transitional wheel mechanism realizing the gradient-reduction computation model is established, and its step-ascending wheel prototype is developed to solve a slope minimization problem for personal mobility aids.
Abstract: Obstacles such as ramps, steps, and irregular floor surfaces are commonly encountered in homes, offices, and other public spaces. These obstacles frequently limit the daily activities of people who use mobility aids. For this purpose, this study solves a slope minimization problem for personal mobility aids. As a solution approach, a gradient-reduction scheme is proposed, which allows existing mobility aids to reduce the required horizontal forces and vibrations when ascending steps while maintaining their wheel sizes. Practically, an axle-transitional wheel mechanism realizing the gradient-reduction computation model is established, and its step-ascending wheel prototype is developed. Specifically, since the proposed wheel enables integration into existing personal mobility-assisting devices, two functional roles, such as rolling and step ascending, can be used. The developed step-climbing wheel can help the users of mobility aids mitigate the aforementioned limitations. The physical and mental burdens of caregivers and medical staff can also be reduced by making the users of the gradient-reduction scheme more self-sufficient. This study provides details on the axle-transitional wheel mechanism and its step-ascending wheel prototype. The findings are analyzed mathematically, and their functionality is verified through extensive experiments using a prototype.
References
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01 Jan 2010
TL;DR: An application of eye tracking method to wheelchairs using the coherence algorithm, which tracks the movement of eye towards left or right, and the eye blinking feature is also used by the algorithm to control the starting and stopping of wheelchair.
Abstract: This paper proposes a new algorithm, the coherence algorithm, for eye movement tracking. Researchers continue to restore some functions lost by handicapped people using some powered electrical and robotic wheelchairs. This paper presents an application of eye tracking method to such wheelchairs. The coherence algorithm tracks the movement of eye towards left or right. The eye blinking feature is also used by the algorithm to control the starting and stopping of wheelchair.
55 citations
TL;DR: A wheelchair control using a head pose free eye-gaze estimation system that includes a 3D orientation sensor to take into account the head pose so that the user can change his or her pose with comfort during navigation.
Abstract: Presented is a wheelchair control using a head pose free eye-gaze estimation. The direction of the wheelchair is computed from a user's eye-gaze pointing. The eye-gaze estimation system includes a 3D orientation sensor to take into account the head pose. Therefore, the user can change his or her pose with comfort during navigation. In experiments, its performance was evaluated in comparison with a manual keyboard control.
46 citations
"Design and implementation of a test..." refers background in this paper
...52(9-10) 1434–1444 The Author(s) 2019 Article reuse guidelines: sagepub....
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...These calculations, which are made ignoring the power loss arising from friction in the gearbox are given in equations (7)–(10)....
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TL;DR: The development of the prototype speech controlled cloud based wheelchair platform using low-cost available speech WebKit in the cloud which works in the web browser as well as on the mobile devices providing live video stream.
39 citations
01 Jan 2016
TL;DR: A new model based on the concept of Artificial Intelligence is proposed which uses Raspberry Pi, for controlling the device, infrared and ultrasonic sensors for robust obstacle detection, USB microphone for voice input, and enhancing the hardware used in previous models and at the same time achieving cost efficiency.
Abstract: To improve the life of disabled people by use of automated tools, many scientists and organizations have been doing research on designing various products. One such intelligent product is the Voice Controlled Wheelchair. Many methods have been used to design it, each method uses a different hardware and hence providing specific functionalities. In this paper we examine few of the implemented methods and then propose a new model based on the concept of Artificial Intelligence which uses Raspberry Pi, for controlling the device, infrared and ultrasonic sensors for robust obstacle detection, USB microphone for voice input. Thus, enhancing the hardware used in previous models and at the same time achieving cost efficiency.
25 citations
01 Dec 2017
TL;DR: An indigenously developed hands-free wheel chair for physically disabled persons based on the Head Gesture Recognition technique using Acceleration sensor and RF (radio frequency) module is used for the smart wireless controlling.
Abstract: This paper describes an indigenously developed hands-free wheel chair for physically disabled persons The proposed device works based on the Head Gesture Recognition technique using Acceleration sensor Conventional electric powered wheel chairs are usually controlled by joysticks or hand gesture technology which cannot fulfil the needs of an almost completely disabled person who has restricted limb movements and can hardly move or turn his head only Acceleration sensor is used for the head gesture recognition and RF (radio frequency) module is used for the smart wireless controlling With the change of head gesture, data is sent wirelessly to the microcontroller based motor driving circuit to control the movement of the Wheel Chair in five different modes, namely FRONT, BACK, RIGHT, LEFT and a special locking system to STAND still at some place The proposed device is fabricated using components collected from local market and tested in lab for successful functioning, test results are included in this paper
22 citations
"Design and implementation of a test..." refers background in this paper
...These calculations, which are made ignoring the power loss arising from friction in the gearbox are given in equations (7)–(10)....
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