Relevant bibliographies by topics / Power wheelchair

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  1. Journal articles
  2. Dissertations / Theses
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Academic literature on the topic 'Power wheelchair'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Power wheelchair"

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LEE, BUM-SUK, JUNG AH LEE, HYUN CHOI, HAN RAM PAK, EUN JOO KIM, JAE HYUK BAE, SUNG MOON YOO, and HYOSUN KWEON. "DEVELOPMENT OF THE USABILITY SCALE FOR POWER WHEELCHAIRS AND ITS APPLICATION IN POWER WHEELCHAIRS USERS IN KOREA." Journal of Mechanics in Medicine and Biology 20, no. 10 (December 2020): 2040031. http://dx.doi.org/10.1142/s021951942040031x.

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More of power wheelchair users’ needs have to be met in the making of power wheelchairs. However, there has been no usability scale for the power wheelchair that is specifically focusing on the users’ needs. The purpose of this study was to test and validate a usability scale for power wheelchairs (USPW). The USPW has been developed through interviews with power wheelchair and consultations with a panel of experts. The USPW consists of four evaluation categories (safety, operation, efficiency, and satisfaction). In order to validate it, its usability and the Quebec User Evaluation of Satisfaction Assistive Technology (QUEST) were also administered to 50 power wheelchair users. The USPW was extracted 12 items from safety, 7 from operation, 5 from efficiency, and 14 from satisfaction, with a total of 38 items. The content validity met the criteria. The total internal consistency (Cronbach’s [Formula: see text]) of the USPW was 0.75. Users of power wheelchair demanded that the safety of moving on the slopes, the satisfaction of storage space for power wheelchairs, and the repair service process would be improved. The correlation between the USPW and the QUEST was significant ([Formula: see text]). The USPW may be very useful to evaluate overall usability of power wheelchair including its safety, operability, efficiency, and satisfaction. The developed usability scale (USPW) may help wheelchair makers become aware of the problems of present power wheelchairs and the users’ needs, allowing them to make better ones.
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Lefkowicz, A. Todd. "Simulation of a Power Wheelchair." Proceedings of the Human Factors Society Annual Meeting 33, no. 17 (October 1989): 1171. http://dx.doi.org/10.1518/107118189786757950.

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A computer-based wheelchair simulation will be demonstrated. Such a wheelchair simulator could be used in rehabilitation both to prescribe controls for patients and to develop new types of wheelchairs. The selection of a wheelchair controller and control dynamics for a specific patient currently involves the actual use of a variety of power wheelchairs. A valid simulator could reduce costs by eliminating the need to test and evaluate a set of power wheelchairs for each patient, increase safety of the patient by eliminating the risk associated with learning to operate a new power wheelchair, and ease collection of performance data by providing automated data collection. Further, the simulation could be used to test control dynamics as related to the user's perspective view when developing new power wheelchair products. The simulation runs on a personal computer with low resolution color display. The realism of the display is augmented by the use of a Fresnel lens to increase the three-dimensional effect. The display is updated frequently to ensure accurate control feedback. The performance measures used to test the simulation include both time and accuracy to move through a computer simulated course and an identical physical course. The initial results from user testing are being used as the basis for an iterative redesign process before formal testing is initiated.
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Campeau-Vallerand, Charles, François Michaud, François Routhier, Philippe S. Archambault, Dominic Létourneau, Dominique Gélinas-Bronsard, and Claudine Auger. "Development of a Web-Based Monitoring System for Power Tilt-in-Space Wheelchairs: Formative Evaluation." JMIR Rehabilitation and Assistive Technologies 6, no. 2 (October 26, 2019): e13560. http://dx.doi.org/10.2196/13560.

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Background In order to prevent pressure ulcers, wheelchair users are advised to regularly change position to redistribute or eliminate pressure between the buttocks region and the seat of the wheelchair. A power tilt-in-space wheelchair (allowing simultaneous pivoting of the seat and the backrest of the wheelchair toward the back or front) meets many clinical purposes, including pressure management, increased postural control, and pain management. However, there is a significant gap between the use of tilt as recommended by clinicians and its actual usage. A Web-based electronic health (eHealth) intervention, including a goal setting, monitoring, reminder, and feedback system of the use of power tilt-in-space wheelchairs was developed. The intervention incorporates behavior change principles to promote optimal use of tilt and to improve clinical postprocurement follow-up. Objective This study aimed to conduct a formative evaluation of the intervention prototype to pinpoint the functionalities needed by end users, namely, power wheelchair users and clinicians. Methods On the basis of an evaluation framework for Web-based eHealth interventions, semistructured interviews were conducted with power wheelchair users and clinicians. A content analysis was performed with a mix of emerging and a priori concepts. Results A total of 5 users of power tilt-in-space wheelchairs and 5 clinicians who had experience in the field of mobility aids aged 23 to 55 years were recruited. Participants found the Web interface and the physical components easy to use. They also appreciated the reminder feature that encourages the use of the tilt-in-space and the customization of performance goals. Participants requested improvements to the visual design and learnability of the Web interface, the customization of reminders, feedback about specific tilt parameters, and the bidirectionality of the interaction between the user and the clinician. They thought the current version of the intervention prototype could promote optimal use of the tilt and improve clinical postprocurement follow-up. Conclusions On the basis of the needs identified by power wheelchair users and clinicians regarding the prototype of a power tilt-in-space wheelchair monitoring system, 3 main directions were defined for future development of the intervention. Further research with new wheelchair users, manual tilt-in-space wheelchairs, various age groups, and family caregivers is recommended to continue the formative evaluation of the prototype.
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Kaisumi, Aya, Yasuhisa Hirata, and Kazuhiro Kosuge. "Investigation of User Load and Evaluation of Power Assistive Control on Cycling Wheelchair." Journal of Robotics and Mechatronics 25, no. 6 (December 20, 2013): 959–65. http://dx.doi.org/10.20965/jrm.2013.p0959.

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Wheelchairs, walkers, and electric wheelchairs are well-known support devices for patients with lowerlimb disabilities. However, disuse of lower limbs presents an ongoing barrier to rehabilitation, and can eventually lead to disuse syndrome. To overcome this situation, researchers have designed the cycling wheelchair. The cycling wheelchair is accessible to most patients who can bend their lower limbs. It is primarily used in rehabilitation facilities with planar floors and gentle slopes. To become practicable for everyday use, cycling wheelchairs require sufficient power to travel up steeper slopes or across bumpy surfaces. This paper aims to clarify the power consumed by users in everyday environments by measuring the tread force on the pedals. The investigation targets lower-limb disabled subjects and unimpaired subjects. It was observed that some of the users could not summon sufficient power for uphill travel. In addition, hemiplegic subjects with only one unimpaired leg placed large load on their healthy limb. As a first step to overcome this problem, we introduce traveling resistance compensation control into a cycling wheelchair and evaluate its efficacy.
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Oliveira, Saulo, Afonso Bione, Lúcia Oliveira, Adalberto da Costa, Fernando de Sá Pereira Guimarães, and Manoel da Cunha Costa. "The Compact Wheelchair Roller Dynamometer." Sports Medicine International Open 1, no. 04 (July 2017): E119—E127. http://dx.doi.org/10.1055/s-0043-111404.

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AbstractThe equipment for evaluating the propulsion of a wheelchair is very complex and expensive. To validate a new dynamometer prototype for assessing the propulsion capacity of wheelchairs, 21 healthy subjects (age: 20.9±2.4 yr; weight: 68.9±7.9 kg; height: 174.0±7.1 cm; BMI: 22.7±2.5 kg·m−2) who do not normally require wheelchairs performed a sprint protocol for 20 s after a 1-min warm-up. The power and rotation data acquired by the prototype (both right and left sides) were compared with those of a reference system via high-speed videography (240 fps). The results showed high levels of accordance (95% CI), excellent values for the intraclass correlation coefficient (ICC: .99; P<0.00), no significant differences in the rotation (P=0.91) and power (P=0.94) between the methods. The proposed equipment met the validation criteria and thus can be applied as a new tool for assessing wheelchair propulsion.
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Muharom, Syahri, and Tukadi Tukadi. "Wheelchair Robot Movements Using Flex Sensor Glove." Jurnal INFORM 3, no. 2 (October 3, 2018): 84. http://dx.doi.org/10.25139/inform.v3i2.964.

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The wheelchair is one of the most commonly used tools for disability person perform activities. But many wheelchairs still use human power to move them, so this research tries to make a wheelchair robot with movement control using a flex sensor glove. In this system using two controllers where one controller is made as a master and the other as a slave, and use Bluetooth as a medium of communication between two controllers. Flex glove sensors are paired in the hands of the user or others as the master, and the controller is in a wheelchair as a slave. Sensor data in hand is sent using Bluetooth master and received by Bluetooth slave, then processed by slave controller and give a command to the motor driver to move the wheelchair. It is expected that the development of wheelchairs can facilitate people with physical disabilities in conducting activities.
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Šakaja, Laura, Ksenija Bašić, Ružica Vuk, Zoran Stiperski, and Andrijana Horvat. "Accessibility in Zagreb for power wheelchair users." Hrvatski geografski glasnik/Croatian Geographical Bulletin 81, no. 2 (December 19, 2019): 43–68. http://dx.doi.org/10.21861/hgg.2019.81.02.02.

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Chen, Chu Wei, and Deng Chuan Cai. "A Wheelchair Design for Topple Prevention." Applied Mechanics and Materials 590 (June 2014): 561–65. http://dx.doi.org/10.4028/www.scientific.net/amm.590.561.

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Wheelchairs are an indispensable transportation tool for the aged and for the disabled. Tips and falls are common accidents to current wheelchairs, suggesting wheelchair safety is imperfect. This study thus proposed an anti-tip concept design to improve manual wheelchair safety. The anti-tip wheelchair was ergonomically designed with the following features: (1) diamond pattern wheel alignment enables users to adjust rear-wheel chamber angle and extend the front and rear casters forward and backward respectively to prevent tipping by increasing the base area; (2) adjustable wheel mechanism for indoor and outdoor uses; (3) collinear alignment of the rear-wheel axle and the center of mass in the sagittal plane reduces push frequency and enhances push power; (4) a spring-driven rear caster compression mechanism aids passing over obstacles on the ground; and (5) height adjustable neck rest provides comfort support.
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Wang, Fang, and Jian Guo Zhang. "Mechanical Design for a Power Wheelchair with Self-Actuated Seating Functions Based on Ergonomics." Applied Mechanics and Materials 275-277 (January 2013): 799–802. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.799.

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Wheelchairs with posture change functions are required by clinicians to assist activities of daily living for handicapped people. In this paper, the mechanism of a wheelchair with self-actuated seating functions was designed and its degree of freedom was introduced. Link length was determined based on ergonomics and anthropometry to meet national standards. Kinematics simulation was carried out in MATLAB to investigate the working characteristics of the wheelchair and prove the feasibility of the scheme. Humanized design was explored which was based on ergonomics to satisfy the safety, comfort and efficiency.
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Stredney, Don, Wayne Carlson, J. Edward Swan, and Beth Blostein. "The Determination of Environmental Accessibility and ADA Compliance Through Virtual Wheelchair Simulation." Presence: Teleoperators and Virtual Environments 4, no. 3 (January 1995): 297–305. http://dx.doi.org/10.1162/pres.1995.4.3.297.

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The widespread use of power wheelchairs has greatly increased the requirements for the accessibility of buildings and other architectural structures to handicapped persons. In addition, recent advances in microcomputer technology have made possible increasingly sophisticated power wheelchair interfaces, such as halo, puff and sip, and muscle control mechanisms, which can provide mobility for an even larger portion of the handicapped population. Finally, the ADA (the Americans with Disabilities Act of 1990) requires handicapped accessibility for (almost) all public structures. We have developed a virtual structure prototyping system that allows navigation by a person using a power wheelchair. The system is a tool for three groups of people: (1) for architects and designers, it provides structure visualization that can both improve the handicapped accessibility of building designs and test a structure for ADA compliance; (2) for wheelchair users, it provides more appropriate device fitting and training with wheelchair control mechanisms; and (3) for health care professionals, it provides evaluations of wheelchair users. The system consists of an instrumented, joystick-driven power wheelchair connected to a high-performance graphics workstation; it simulates the actual speed and maneuverability of the particular wheelchair within a virtual structure. The display generates realistic interiors containing multiple light sources and surface textures and is viewed in stereo through lightweight polarized glasses. The system maintains a hierarchical data structure which detects collisions between the virtual wheelchair and the environment. In this paper we discuss (1) the system's user interface, (2) the system's hardware and software configuration, (3) the impact of the system on the architectural design process, and (4) future system additions. In the last section we also discuss virtual manipulation for enabling technology.
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Dissertations / Theses on the topic "Power wheelchair"

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Johansson, Jonas, and Daniel Petersson. "Torque Sensor Free Power Assisted Wheelchair." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-656.

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A power assisted wheelchair combines human power, which is delivered by the arms through the pushrims, with electrical motors, which are powered by a battery. Today’s electric power assisted wheelchairs use force sensors to measure the torque exerted on the pushrims by the user. The force sensors in the pushrims are rather expensive and this approach also makes the wheels a little bit clumsy. The objective with this project is to find a new, better and cheaper solution that does not use expensive force sensors in the pushrims. The new power assisted wheelchair will instead only rely on its velocity, which is measured with rotational encoders, as feedback signal and thereby the project name “Torque Sensor Free Power Assisted Wheelchair”.

The project consisted of two main parts; an extensive construction part, where an ordinary joystick controlled motorized wheelchair has been rebuild to the new power assisted wheelchair without torque sensors and a development part, where different torque sensor free controllers has been designed, simulated, programmed and tested.

The project resulted in a torque sensor free power assisted wheelchair, where the final implemented design is a proportional derivative controller, which gives a very good assisting system that is robust and insensitive to measurement noise. The proportional derivative control design gives two adjustable parameters, which can be tuned to fit a certain user; one parameter is used to adjust the amplification of the user’s force and the other one is used to change the lasting time of the propulsion influence.

Since the new assisting control system only relies on the velocity, the torque sensor free power assisted wheelchair will besides giving the user assisting power also give an assistant, which pushes the wheelchair, additional power. This is a big advantage compared to the pushrim activated one, where this benefit for the assistant is not possible.

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Liadis, Keith Nicholas. "Design of a Power-Assist Hemiplegic Wheelchair." Digital WPI, 2006. https://digitalcommons.wpi.edu/etd-theses/794.

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Current one-handed manual wheelchairs are difficult to propel because one arm can only provide half the power that is ascertained in a two-handed manual wheelchair. A power-assisted hemiplegic (one-sided paralysis) wheelchair was developed that can effectively be propelled with one arm while remaining maneuverable, lightweight, and foldable. An existing manual wheelchair was minimally modified and fitted with powerassisted components that could alternatively be attached to a wide range of manual wheelchairs. The design implements a motor and gear train to power the wheel on the user’s affected side, encoders on both rear wheels to track wheel position, and a heel interface on the footrest to control steering. A controls program was developed that analyzes wheel position and steering to respond to the motion of the hand-driven wheel. Extensive testing was performed to ensure design integrity. Testing results showed that the prototype successfully met and exceeded predetermined design specifications based on industry standard testing procedures. The design has the potential to deliver increased freedom to a considerable consumer base.
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Hu, Yiwei. "Development of wireless network system on a power wheelchair." Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7661.

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The development of wireless communication technology offers new opportunities to enhance the functionalities of mobility systems (e.g. powers wheelchairs and robots). This thesis presents new hardware and software architecture to offer ease of user control and power efficiency to an autonomous mobility system by using Wireless Networked Control (WSC). A wireless network is applied to perform both environment sensing and user control. The development will be demonstrated through a case study on a power wheelchair. The challenge in the development of such a wireless solution is to accomplish a set of system activities (e.g. system initialization, system monitoring, power management) under different circumstances within a dynamic wireless network without sacrificing flexibility, energy-efficiency, or reliability. The optimal way to achieve this is to design a protocol stack orientated to the demand of a specific system with cross-layer optimization. However, it requires significant design effort. In this thesis, a wireless network is constructed by utilizing a commercial-of-the-shelf (COTS) protocol. The development focuses on system integration and Application Layer. This accelerates the development progress with the benefits of cost effectiveness and less burden on protocol design. However, the COTS protocol is not able to provide a solution with maximum efficiency, because that the development of a COTS protocol is constrained by many factors. For example, the low layers of a COTS protocol are usually not available for customization due to the license issue. The aim of this project is to develop a wireless platform to enable wireless functional devices to be added into a mobile system. The main benefit of such a wireless network system (WNS) is to allow new modules to be readily incorporated into the mobility system, which otherwise are difficult, because either, the physical wiring is prohibitive or the current system does not allow the signals to be processed. The strategy for developing such a wireless network with desired functionalities is to build both identity management module and power management module based upon system design and Application Layer development. The identity management module allows the system to perform self-construction and self-maintenance and the power management offers high power efficiency. These two modules are developed independently and integrated into an autonomous control loop. Transitions between different modules are achieved by handshaking protocols. The advantage of such a strategy is the ease for customization and extension. The infrastructure includes gateway, Log-in system and radio frequency (RF) platform.
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Clark, Laura L. "Design and Testing of a Quick-Connect Wheelchair Power Add-On Unit." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30289.

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A quick-connect wheelchair power add-on unit (PAU) has been developed at the Human Factors Engineering Center of Virginia Tech. The objective of the new invention is to provide an inexpensive, highly portable product which can quickly convert a manual wheelchair into a power-operated wheelchair. This dissertation details the three year research and design effort to develop the new wheelchair PAU. Results are presented from a series of evaluations conducted to identify performance and user-interaction characteristics of the PAU. Interpretation of the results provides a prioritized list of identified design deficiencies along with wheelchair expert and design team suggestions for the next generation of design alterations. The three evaluations conducted with the second generation PAU prototype include a series of wheelchair expert interviews, a PAU performance evaluation, and a usability evaluation which utilized wheelchair operators as subjects. Also included in the dissertation is an explanation of the need for a new PAU, a description of the most recent design iteration, a literature review containing information about the history of wheelchairs, the condition of the current PAU market, and an analysis of wheelchair PAU consumers. The new invention was conceived and patented by Dr. John G. Casali of the Industrial and Systems Engineering (ISE) Department at Virginia Tech. This research was supported jointly by Southwestern Applied Technologies, L. C., of Roanoke, Virginia and Virginia's Center for Innovative Technology in Herndon, Virginia.
Ph. D.
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Manrique, Lisette M. "The Impact of Using an Obstacle Sensing System in the Power Wheelchair Training of Children with Disabilities." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-050305-133909/.

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Young, Jason A. "Development and validation of a model for analyzing the stability of a power wheelchair." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ40980.pdf.

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Rivera, Alfredo (Alfredo M. )., and Timothy Studley. "Design and manufacturing proposal for a stair-climbing wheelchair without an external power source." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40945.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.
Includes bibliographical references (leaf 26).
With over two million wheelchair users in the United States, many buildings have struggled to provide accessible elevators and ramps for the disabled. The only other option for the disabled to ascend stairs is to purchase a high-tech battery-operated wheelchair with elaborate sensors and gyroscopes, which can cost around $25,000. As a result, there is a high demand for a cheap and efficient way to climb stairs with a practical wheelchair. With the safety of the user as a main concern, it is the goal of this report to provide a light-weight, inexpensive stair-climbing wheelchair. In order to significantly reduce cost of production, the wheelchair will not have any outside power source. The user's strength is the only means of energy for climbing. Our specific design relies on three critical modules: wheels with retractable spokes, a lock-in ratchet on the axel, and a seat-tilting mechanism. By focusing on integrating light-weight materials into the design, the force required to operate the wheelchair should be very manageable. The next stages of manufacturing were determined and explicitly outlined. Using SolidWorks and previously developed components, a complete manufacturing proposal has been formulated. The production calls for two additional wheels with retractable spokes, two locking mechanisms of the main axel, and a tilt-in-space feature using gas springs. The final product should provide the disabled with a safe, reliable, and inexpensive wheelchair capable of ascending nearly any staircase.
by Alfredo Rivera [and] Timothy Studley.
S.B.
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WIGGERMANN, NEAL. "COMPLIANCE AND EVALUATION OF CODE FOR LOW ENERGY POWER OPERATED HANDICAP ACCESSIBLE DOORS." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1187366086.

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Favey, Clément. "Contribution à la profilométrie optique active, pour la sécurisation des déplacements de fauteuils roulants électriques." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS468.

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En France, plus de 2 enfants sur 1000 naissent avec une « Paralysie Cérébrale », provoquée par des lésions au niveau cérébral. Cette pathologie non-évolutive, entraine des troubles de la motricité et du processus attentionnel. Certains de ces enfants n’ont pas accès au fauteuil roulant électrique pour des raisons de sécurité, car susceptibles de commettre des erreurs dangereuses de pilotage. Ils n’ont donc pas accès à l’autonomie et se déplacent en fauteuil manuel poussé par une tierce personne. Or, aujourd’hui les études médicales du domaine font consensus sur la nécessité de l’accession au déplacement autonome, indispensable pour le développement personnel, intellectuel et la participation sociale de toute personne, handicapée ou non. Ce travail de thèse a pour but de développer un système optronique adaptable, permettant de transformer un fauteuil roulant électrique classique, en fauteuil roulant semi-autonome. Ceci signifie que l’utilisateur garde le contrôle de la direction et de la vitesse du fauteuil, mais que des capteurs peuvent inhiber les commandes empêchant les situations de basculement (trottoirs, escaliers, etc.) ou de collision frontale. La priorité est placée sur un dispositif constitué d’une combinaison de capteurs pouvant s’adapter sur les différents modèles existants de fauteuil en respectant leur encombrement initial. Tous les capteurs utilisés ou conçus pour l’objectif recherché, doivent maintenir leurs performances dans tous les environnements (intérieur, extérieur, fort ensoleillement, goudron mouillé, etc.). La consommation énergétique totale ne doit pas excéder quelques Watts. Concernant l’anticollision frontale et le passage de portes, nous avons développé une solution associant pour chaque côté du fauteuil un double capteur infrarouge et un capteur à ultrasons. Les capteurs infrarouges, développés en interne, sont conçus pour avoir des zones de protection cylindriques, permettant de détecter efficacement les passages dégagés de la taille du fauteuil et gérer les angles grâce au double capteur. Le capteur à ultrasons est destiné à gérer les obstacles fins foncés frontaux à courte distance pouvant échapper aux capteurs infrarouges. Concernant le contrôle de la planéité du sol et donc l’antibasculement, un lidar laser miniature trifaisceaux a été développé pour protéger chaque roue avec 1 m d’anticipation. Les données des différents capteurs seront couplées à l’odométrie du fauteuil afin de prendre les décisions sur les commandes. Les capteurs sont conçus pour assurer une anticipation suffisante jusqu’à 3km/h. Il s’agit d’une vitesse faible, mais adaptée à des utilisateurs qui dans le contexte actuel ne sont pas autorisés à piloter. Des tests en situation réelle dans des situations climatiques variées sont réalisés
In France, more than 2 children out of 1000 are born with "Cerebral Palsy", caused by lesions on the cerebral level. This non-progressive pathology causes disorders of motor skills and the attentional process. Some of these children do not have access to the electric wheelchair for safety reasons, as they may make dangerous steering mistakes. They do not have access to autonomy and move in manual wheelchair pushed by a third person. However, today the medical studies of the field point on the need for accession to autonomous displacement, essential for personal development, intellectual and social participation of any person, disabled or not. This thesis aims to develop an adaptable optronic system, transforming a classic electric wheelchair into a semi-autonomous wheelchair. This means that the user keeps control of the direction and speed of the chair, but that sensors can inhibit controls that prevent from falls (sidewalks, stairs, etc.) or frontal collisions. The priority is placed on a device consisting of a combination of sensors that can adapt to the different existing models of wheelchair respecting their initial size. All sensors used or designed for the intended purpose, must maintain their performance in all environments (indoor, outdoor, strong sunlight, wet tar, etc.). The total energy consumption must not exceed a few Watts. For frontal collision avoidance and door entry, we have developed a solution combining for each side of the chair a double infrared sensor and an ultrasonic sensor. The infrared sensors, developed in-house, are designed to have cylindrical protection zones, making it possible to effectively detect the passages cleared of the size of the chair and to manage the angles thanks to the double sensor. The ultrasonic sensor is designed to handle dark fine end-face obstacles that can escape infrared sensors. The control of the flatness of the floor and therefore of the anti-tip, a LiDAR triple laser beams has been developed to protect each wheel with 1 m of anticipation. The data of the various sensors will be coupled to the odometry of the chair to make decisions on orders. The sensors are designed to provide sufficient anticipation up to 3 km/h. This is a low speed, but suitable for users who in the current context are not allowed to drive.Real-life tests in various climatic situations are carried out. Solutions are sought for chaotic floors or when the user moves a lot on the chair
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Campos, Luis Felipe Castelli Correia de 1987. "Comparação entre métodos para mensuração da potência aeróbia em atletas tetraplégicos = Comparison of methods for aerobic power assessment in athletes with tetraplegia." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275106.

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Orientador: José Irineu Gorla
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Educação Física
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Resumo: A avaliação da Potência Aeróbia em atletas com tetraplegia, como indicador de limite máximo de tolerância ao exercício aeróbio, é uma importante área de interesse no campo da performance paradesportiva. O presente estudo teve como objetivo comparar as medições direta e indireta do Consumo Pico de Oxigênio (VO2pico) no teste de campo contínuo e incremental Octagon Multi-Stage Test (OMFT) bem como, correlacionar os valores obtidos no teste contínuo e incremental no ciclo-ergometro de braço (EB). Participaram desse estudo 8 atletas tetraplégicos praticantes de Rugby em cadeira de rodas. Os atletas inicialmente realizaram a avaliação antropométrica para o cálculo do índice de massa corporal (IMC) e percentual de gordura (%G) em seguida foram submetidos ao teste de campo incremental (OMFT) com a utilização do analisador de gás portátil K4b2 Cosmed para mensuração direta do VO2pico. Após 72 horas os mesmos atletas realizaram o teste contínuo e incremental no EB para obtenção dos valores de VO2pico. Pré e pós-testes foram mensurados os valores de Frequência Cardíaca (FC), Concentração de Lactato ([Lac]), Consumo de Oxigênio (VO2) e percepção Subjetiva de Esforço (PSE). Além disso, no teste de campo (OMFT) foram coletados os dados de distância total percorrida, estágio final e número de voltas realizadas variáveis para mensuração indireta do VO2pico. Para os valores de VO2pico, observou-se que no EB os valores de média do grupo foi de 17,8±6 ml/kg/min, enquanto que para o teste OMFT foram de 21,9±5,2ml/kg/min pela mensuração direta e 24,8±3,3ml/kg/min para a mensuração através da equação de predição pré-estabelecida, a FCmax foi de 129,1±24bpm no EB e de 127,8±26bpm no OMFT. Já a PSE foi de 8,2±1,03 no EB e de 6,5±2,2 no OMFT. Através do calculo de correlação entre as mensurações de VO2pico, observou-se alta correlação (r=0.86) entre as mensuração do OMFT direta e indireta com nível de significância de p<0.05 e através do teste de Bland-Altman foi observada a concordância entre os métodos com LIC95% variando de -2,8 a 8,5. O teste OMFT apresenta validade para mensuração da Potência Aeróbia em atletas com tetraplegia, porém, observa-se a necessidade de reajustes no protocolo para que os resultados encontrados sejam de fato mais próximos à realidade dos atletas com tetraplegia, possibilitando maior controle dos resultados obtidos e a prescrição da intensidade de exercícios, evitando assim, lesões devido à sobrecarga do treinamento
Abstract: Evaluation of Aerobic Power in Spinal Cord Injury athletes as an indicator of maximum aerobic exercise tolerance is an important area of interest of sports performance. The present study aimed to compare the direct and indirect measurements of peak oxygen consumption (VO2peak) in field testing continuous and incremental Octagon Multi-Stage Test (OMFT) and to correlate the values obtained in the test continuous incremental in cycle-arm ergometer (EA). Eight athletes of the Wheelchair Rugby participated in this study. These athletes initially underwent anthropometric measurements for calculating the Body Mass Index (BMI) and percent body fat (%BF). After were submitted to field test (OMFT) with the use of portable gas analyzer K4b2 Cosmed for measurement direct of the VO2peak. After 72 hours the same athletes performed the test continuous incremental in EA to obtain the values of VO2peak. Pre and post-test values have been measured heart rate (HR), lactate concentration ([Lac]), oxygen consumption (VO2) and perceived exertion (PE). Moreover, the field test (OMFT) data were collected from total distance traveled, stage, and number of turns. Variables to measurement indirect of VO2 peak. For the VO2peak values, it was observed that the values of the EA group mean was 17.8 ± 6ml/kg/min, whereas for the test OMFT were 21.9 ± 5.2 ml/kg/min by direct measurement and 24.8 ± 3.3 ml/kg/min for measurement prediction equation by pre-established, HRmax was 129.1 ± 24bpm in EA and 127.8 ± 26bpm in OMFT. Already the PSE was 8.2±1.03 in EA and 6.5±2.2 in OMFT. By calculating the correlation between the measurements of VO2peak, there was a high correlation (r = 0.86) between the measurement of direct and indirect OMFT with a significance level of p <0.05 and by Bland-Altman concordance was observed between methods with varying LIC95% from -2.8 to 8.5. The OMFT shows validity for measuring Aerobic Power in athletes with tetraplegia; however, there is a need for adjustments in the protocol so that the results are actually closer to the reality of athletes with tetraplegia, enabling greater control of the results and prescription of exercise intensity, thus avoiding injury due to overload training
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Atividade Fisica Adaptada
Mestre em Educação Física
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Books on the topic "Power wheelchair"

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Centers for Medicare & Medicaid Services (U.S.). Protecting Medicare's power wheelchair and scooter benefit. Baltimore, MD: Centers for Medicare & Medicaid Services, 2004.

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Young, Jason A. Development and validation of a model for analyzing the stability of a power wheelchair. Ottawa: National Library of Canada, 1998.

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Finance, United States Congress Senate Committee on. Taking taxpayers for a ride: Fraud and abuse in the power wheelchair program : hearing before the Committee on Finance, United States Senate, One Hundred Eighth Congress, second session, April 28, 2004. Washington: U.S. G.P.O., 2004.

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Aronovitz, Leslie G. Medicare: CMS's program safeguards did not deter growth in spending for power wheelchairs : report to the Chairman, Committee on Finance, U.S. Senate. Washington, D.C: United States Government Accountability Office, 2004.

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Aging, United States Congress Senate Special Committee on. Eliminating waste and fraud in Medicare: An examination of prior authorization requirements for power mobility devices : hearing before the Special Committee on Aging, United States Senate, One Hundred Twelfth Congress, second session, Washington, DC, September 19, 2012. Washington: U.S. G.P.O., 2013.

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Communication, Sport and Disability: The Case of Power Soccer. Taylor & Francis Group, 2017.

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Communication, Sport and Disability: The Case of Power Soccer. Taylor & Francis Group, 2015.

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Taking Taxpayers for a Ride: Fraud and Abuse in the Power Wheelchair Program: Hearing Before the Committee on Finance, United States Senate, One Hu. Not Avail, 2004.

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Book chapters on the topic "Power wheelchair"

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Senk, Alexander M. "Power (Wheelchair) Soccer." In Adaptive Sports Medicine, 149–59. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56568-2_14.

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Guedira, Youssef, Franck Bimbard, Jules Françoise, René Farcy, and Yacine Bellik. "Tactile Interface to Steer Power Wheelchairs: A Preliminary Evaluation with Wheelchair Users." In Lecture Notes in Computer Science, 424–31. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94277-3_66.

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Hema, C. R., and M. P. Paulraj. "Control Brain Machine Interface for a Power Wheelchair." In IFMBE Proceedings, 287–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21729-6_75.

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Oh, Sehoon, and Yoichi Hori. "Human-Friendly Motion Control of Power-Assisted Wheelchair." In Springer Tracts in Advanced Robotics, 339–69. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-12922-8_13.

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Nadeau, M., P. Léveillé, M. Quessy, and D. Royer. "The Mechanical Power Output of World Class Wheelchair Athletes." In Adapted Physical Activity, 87–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-74873-8_13.

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Fisher, Robert, Reid Simmons, Cheng-Shiu Chung, Rory Cooper, Garrett Grindle, Annmarie Kelleher, Hsinyi Liu, and Yu Kuang Wu. "Spectral Machine Learning for Predicting Power Wheelchair Exercise Compliance." In Lecture Notes in Computer Science, 174–83. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08326-1_18.

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Chen, Pei-Chung, Xiao-Qin Li, and Yong-Fa Koh. "Estimation of Residual Traveling Distance for Power Wheelchair Using Neural Network." In Lecture Notes in Electrical Engineering, 43–49. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17314-6_6.

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Lung, Chi-Wen, Tse-Yu Cheng, Yih-Kuen Jan, Hsin-Chieh Chen, and Ben-Yi Liau. "Electromyographic Assessments of Muscle Activation Patterns During Driving a Power Wheelchair." In Advances in Intelligent Systems and Computing, 705–11. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41694-6_68.

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Lung, Chi-Wen, Chien-Liang Chen, Yih-Kuen Jan, Li-Feng Chao, Wen-Feng Chen, and Ben-Yi Liau. "Activation Sequence Patterns of Forearm Muscles for Driving a Power Wheelchair." In Advances in Intelligent Systems and Computing, 141–47. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60822-8_14.

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Thomas, Issac, M. I. John, Robinson Lal, Jobi Lukose, and J. Sanjog. "Design and Fabrication of Low-Cost Detachable Power Unit for a Wheelchair." In Lecture Notes in Mechanical Engineering, 755–64. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5463-6_67.

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Conference papers on the topic "Power wheelchair"

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Miller, Christopher, Kelilah Wolkowicz, Jariullah Safi, and Sean N. Brennan. "State of Charge Estimation for an Electric Wheelchair Using a Fuel Gauge Model." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9802.

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Electric wheelchair users depend on a reliable power system in order to regain mobility in their daily lives. If a wheelchair’s battery power depletes without the user being aware, the individual may become stranded, further limiting their freedom of mobility and potentially placing the user in a harmful situation. This research seeks to develop a State-of-Charge (SOC) estimator for the batteries of an electric wheelchair. A second-order equivalent circuit battery model is developed and parameterized for a wheelchair’s lead-acid battery pack. To simplify the SOC estimation, this algorithm models a vehicle’s fuel gauge. A coulomb accumulator is incorporated to estimate energy usage in the non-linear region of the OCV-SOC curve, while a Kalman filter is used to estimate SOC in the linear region of the curve. The estimator is verified using experimentally collected data on-board a robotic wheelchair. The implementation of these algorithms with powered wheelchairs can significantly improve the estimation of wheelchair battery power and can ultimately be coupled with warning systems to alert users of depleting battery life, as well as enable low-power modes to increase wheelchair user safety.
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Jose, Marcelo A., Alexandre A. G. Martinazzo, Leandro C. Biazon, Irene K. Ficheman, Roseli D. Lopes, and Marcelo K. Zuffo. "Power wheelchair open platform." In 2014 5th IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob). IEEE, 2014. http://dx.doi.org/10.1109/biorob.2014.6913819.

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Suzuki, Tatsuto, Hironobu Uchiyama, Junichi Kurata, and Kenneth T. V. Grattan. "Investigating the Propelling Wheelchair Behavior Against Various Loads." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61439.

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The purpose of this study is to solve an attendant’s daily propelling wheelchair behavior, which is based on propelling force and walking speed against loads, for design of wheelchairs and other carts to handle materials. To obtain the propelling behavior, we proposed the model of the attendant propelling the wheelchair, such as the attendant is a motor, and the wheelchair is a load. Along with the model, we carried out experiments to solve the propelling behavior. The experiments were carried out on the ground and on a new type of a treadmill, which can generate various resistant forces. As the result, the propelling force increased and the walking speed decreased gradually with increasing the resistant force. This change is mostly along on a line. We also define a mechanical power of the propelling behavior and calculated the power. It was about 50W on daily use. The power of the propelling wheelchair is very small, therefore the comfortable design of attendant’s wheelchair must be done with the ability of attendant’s propelling.
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Kadirova, Seher Yusnieva, and Teodor Rumenov Nenov. "Design of Power Wheelchair Controller." In 2020 7th International Conference on Energy Efficiency and Agricultural Engineering (EE&AE). IEEE, 2020. http://dx.doi.org/10.1109/eeae49144.2020.9279065.

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Kupetz, D. J., S. A. Wentzell, and B. F. BuSha. "Head motion controlled power wheelchair." In 2010 36th Annual Northeast Bioengineering Conference. IEEE, 2010. http://dx.doi.org/10.1109/nebc.2010.5458224.

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Emam, Hamed, Yskandar Hamam, Eric Monacelli, and Karim Djouani. "Power wheelchair driver behaviour modelling." In 2010 7th International Multi-Conference on Systems, Signals and Devices (SSD). IEEE, 2010. http://dx.doi.org/10.1109/ssd.2010.5585578.

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Choi, Jin, Yuk Lai, Nathan Harrison, and Robert Curiel. "The Design of a Universal Autonomous Power Tray." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/rsafp-8861.

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Abstract Several accessories have been developed to aid the wheelchair-confined individual in retaining their social independence. However, after a comprehensive study it was determined that a device, which would automatically extend the immediate reach of the handicapped individual, could not be easily added to such currently existing wheelchairs. We proposed a device that could easily be attached to the back of the electric wheelchair. This unit contains all necessary hardware to support the movement of an actuating arm whose intent is to automatically deliver and retrieve objects outside the person’s immediate reach. In addition, the unit does not significantly exceed the dimensions of the chair so as to not obstruct its normal use. To maximize our efforts, we re-evaluated the creativity of its construction: This was done to optimize its durability, reliability, and ultimately lower its construction cost. The ease of its manufacturing supports our intent for a universal application so that all handicapped individuals could benefit from this device as an after-market electric wheelchair accessory. Achieving these types of functions required the development of two pneumatic telescoping arms that can match and overcome its maximum load of 15 lb., and an electrical control system that both develops arid defines all object motions. A comprehensive static and dynamic analysis was performed to, determine the forces governing the motion of the arm as well as to predict its operating speed and direction. This analysis also tests the boundaries of our control system. This information allowed us to determine the range and limitations that defined the electrical as well as mechanical components of this system.
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Petersson, Daniel, Jonas Johansson, Ulf Holmberg, and Bjorn Astrand. "Torque Sensor Free Power Assisted Wheelchair." In 2007 IEEE 10th International Conference on Rehabilitation Robotics. IEEE, 2007. http://dx.doi.org/10.1109/icorr.2007.4428421.

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Leaman, Jesse, and Hung Manh La. "The Intelligent Power Wheelchair Upgrade Kit." In 2020 Fourth IEEE International Conference on Robotic Computing (IRC). IEEE, 2020. http://dx.doi.org/10.1109/irc.2020.00074.

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Mitzlaff, Paul, Robert Niznik, Redwan Alqasemi, and Rajiv Dubey. "Universal Android-Based Kit for Wireless Control of Wheelchairs." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39425.

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The use of apps on hand-held devices has the potential to offer advancements in controlling many devices with an intuitive user interface, including power wheelchair control. Many powered wheelchair users require special adaptations to their control interface in order to drive the chair. This paper presents the development and testing of an Android based control system for a powered wheelchair. The control system utilizes the Android device’s sensors to control the wheelchair. The device can be attached to various parts of the user’s body which the user can move to control the wheelchair. The accelerometers in the device are used to drive the chair using Bluetooth technology connected to the wheelchair’s control system. Subject testing was performed with the user holding the Android device in their hand while they performed a variety of structured tasks. These series of tasks were duplicated while the Android device was attached to their hat and again when strapped to the upper left arm. The results from the collected data on specific metrics were compared against similar data when the wheelchair is controlled using a standard wheelchair joystick.
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