error
Kurzer Serviceunterbruch am Donnerstag, 15. Januar 2026, 12 bis 13 Uhr. Sie können in diesem Zeitraum keine neuen Dokumente hochladen oder bestehende Einträge bearbeiten. Das Login wird in diesem Zeitraum deaktiviert. Grund: Wartungsarbeiten // Short service interruption on Thursday, January 15, 2026, 12.00 – 13.00. During this time, you won’t be able to upload new documents or edit existing records. The login will be deactivated during this time. Reason: maintenance work
 

Journal: Journal of Rehabilitation and Assistive Technologies Engineering

Abbreviation

Publisher

SAGE

Journal Volumes

ISSN

2055-6683

Description

Filters

2017 - 201922020 - 20231
Reset filters

Search Results

Publications 1 - 3 of 3
  • A 2D lightweight instrumented wheel for assessing wheelchair functionality/activity
    Item type: Journal Article
    Togni, Reto; Müller, Manuel; Plüss, Stefan; et al. (2023)
    Journal of Rehabilitation and Assistive Technologies Engineering
    Introduction: Force measurement wheels are essential instruments for analysing manual wheelchair propulsion. Existing solutions are heavy and bulky, influence propulsion biomechanics, and are limited to confined laboratory environments. In this paper, a novel design for a compact and lightweight measurement wheel is presented and statically validated. Methods: Four connectors between the push-rim and wheel-rim doubled as force sensors to allow the calculation of tangential and radial forces as well as the point of force application. For validation, increasing weights were hung on the push-rim at known positions. Resulting values were compared against pre-determined force components. Results: The implemented prototype weighed 2.1 kg and was able to transmit signals to a mobile recording device at 140 Hz. Errors in forces at locations of propulsive pushes were in the range up to ±3.1 N but higher at the frontal extreme. Tangential force components were most accurate. Conclusion: The principle of instrumenting the joints between push-rim and wheel-rim shows promise for assessing wheelchair propulsion in daily life.
  • Clinical evaluation of a low-cost robot for use in physiotherapy and gait training
    Item type: Journal Article
    Volpini, Mariana; Bartenbach, Volker; Pinotti, Marcos; et al. (2017)
    Journal of Rehabilitation and Assistive Technologies Engineering
    Background Robotic-assisted gait training, a viable and promising therapeutic option for neurological rehabilitation, is not widely adopted in developing countries because of its high cost. In this paper, we describe the concept and construction of a low-cost robot prototype to restore walking ability in children with neurological dysfunction. Methods The proposed robot consists of an orthosis, a treadmill, a body weight support system and two ankle guidance systems that move the ankles along a physiological kinematic trajectory. The spatiotemporal gait parameters of 60 children with typical development and children with cerebral palsy (aged 7–10 years) were obtained through clinical tests and compared with those provided by the robot. Results The robotic orthosis presents normative values for stride length, step length and cadence during the typical development of children’s gait speed and allows speed adjustments according to the degree of neuromotor impairment. Conclusion The results evidence the high feasibility of developing a low-complexity rehabilitation device compliant with the physiological trajectory of the ankle as well as with several other physiological gait parameters.
  • Stochastically modulated inter-pulse intervals to increase the efficiency of functional elecrtical stimulation cycling
    Item type: Conference Paper
    Aksöz, Efe A.; Luder, M.A.; Laubacher, Marco; et al. (2018)
    Journal of Rehabilitation and Assistive Technologies Engineering
    Introduction: Functional electrical stimulation cycling has various health benefits, but the mechanical power output and efficiency are very low compared to volitional muscle activation. Stimulation with variable frequency showed significantly higher power output values in experiments with a knee dynamometer. The aim of the present work was to compare stochastic modulation of inter-pulse interval to constant inter-pulse interval stimulation during functional electrical stimulation cycling. Methods: Seventeen able-bodied subjects participated (n = 17). Quadriceps and hamstring muscle groups were stimulated with two activation patterns: P1-constant frequency, P2-stochastic inter-pulse interval. Power output was measured on functional electrical stimulation ergometer. Results: Overall, mean power output with the stochastically modulated pattern P2 was lower than with P1 (12.57 ± 3.74 W vs. 11.44 ± 3.81 W, P1 vs. P2, p = 0.022), but no significant differences during the first 30 s and the last 30 s were observed. Conclusions: This study showed that stimulation strategies that use randomized modulation of inter-pulse intervals can negatively affect power output generation during functional electrical stimulation cycling. To minimise voluntary contractions, power measurement and assessment should be focused on the periods where only the quadriceps are stimulated.
Publications 1 - 3 of 3