Development of an inertial type wheelchair dynamometer and its calibration

Seonhong Hwang*, Seunghyeon Kim, Jongsang Son, Youngho Kim

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A dynamometer is a device for measuring force, moment of force (torque), or power. There are several types of dynamometers. We developed chassis type and inertial type wheelchair dynamometer. The inertial dynamometers should be determined the inertia and resistance. Therefore, we designed calibrating devices and analytical models for static and dynamic calibration of the developed dynamometer. The linear equations for the transducers to convert the outputs from the sensors into the torque were determined by 50.98v-2.44 (right sensor) and 50.16v-3.25 (left sensor) respectively. As a results of the dynamic calibration, the moment of inertia of the fixed part of the roller system was estimated at 0.0344 kg·m2 by using the mobile disk with 0.028 kg·m2. The total resistive torque, when the weight of user-wheelchair system was 77.5kg, estimated at -2.487(±0.161)Nm. Although the developed system has some inevitable limitations, it is expected that the data from the dynamometer would be useful to investigate the kinetics of the wheelchair propulsion.

Original languageEnglish (US)
Title of host publicationProceedings of the 6th IASTED International Conference on Biomechanics, BioMech 2011
Pages113-117
Number of pages5
DOIs
StatePublished - Dec 1 2011
Event6th IASTED International Conference on Biomechanics, BioMech 2011 - Pittsburgh, PA, United States
Duration: Nov 7 2011Nov 9 2011

Publication series

NameProceedings of the 6th IASTED International Conference on Biomechanics, BioMech 2011

Conference

Conference6th IASTED International Conference on Biomechanics, BioMech 2011
CountryUnited States
CityPittsburgh, PA
Period11/7/1111/9/11

Keywords

  • Moment of inertia
  • Resistive torque
  • Wheelchair
  • Wheelchair dynamometer

ASJC Scopus subject areas

  • Bioengineering
  • Mechanics of Materials
  • Biomaterials

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