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Design and Fabrication of an Instrumented Handrim to Measure the Kinetic and Kinematic Information by the Hand of User for 3D Analysis of Manual Wheelchair Propulsion Dynamics.

Mallakzadeh M, Akbari H - J Med Signals Sens (2014)

Bottom Line: In this regard, the observed data extracted from an inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim are presented to show the output behavior of the instrumented handrim.The recorded forces and torques were in agreement with previously reported magnitudes.However, this paper can provide readers with some technical insights into possible solutions for measuring the manual wheelchair propulsion biomechanical data.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Biomechanics Group, Iran University of Science and Technology, Tehran, Iran.

ABSTRACT
The repetitious nature of propelling a wheelchair has been associated with the high incidence of injury among manual wheelchair users (MWUs), mainly in the shoulder, elbow and wrist. Recent literature has found a link between handrim biomechanics and risk of injury to the upper extremity. The valid measurement of three-dimensional net joint forces and torques, however, can lead to a better understanding of the mechanisms of injury, the development of prevention techniques, and the reduction of serious injuries to the joints. In this project, an instrumented wheel system was developed to measure the applied loads dynamically by the hand of the user and the angular position of the wheelchair user's hand on the handrim during the propulsion phase. The system is composed of an experimental six-axis load cell, and a wireless eight channel data logger mounted on a wheel hub. The angular position of the wheel is measured by an absolute magnetic encoder. The angular position of the wheelchair user's hand on the handrim during the propulsion phase (ɸ) or point of force application (PFA) is calculated by means of a new-experimental method using 36 pairs of infrared emitter/receiver diodes mounted around the handrim. In this regard, the observed data extracted from an inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim are presented to show the output behavior of the instrumented handrim. The recorded forces and torques were in agreement with previously reported magnitudes. However, this paper can provide readers with some technical insights into possible solutions for measuring the manual wheelchair propulsion biomechanical data.

No MeSH data available.


Related in: MedlinePlus

(a) The components of the instrumented wheel system (IWS). (A) wheel, (B) handrim, (C) retainer, (D) wheel hub, (E) experimental sis-axis load cell, (F) plexiglas disc, (G) L-shaped slotted beam. (b) The assembly of the IWS. (c) An inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim
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Figure 1: (a) The components of the instrumented wheel system (IWS). (A) wheel, (B) handrim, (C) retainer, (D) wheel hub, (E) experimental sis-axis load cell, (F) plexiglas disc, (G) L-shaped slotted beam. (b) The assembly of the IWS. (c) An inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim

Mentions: The handrim assembly is attached to a 15 mm thick round plexiglas disc via four L-shaped slotted beams upon which various size handrims can be mounted. Besides, the distance between handrim and wheel is adjustable. The assembled handrim is mounted directly to the experimental six-axis load cell without connecting to other parts of the wheel. The other end of the load cell is attached to a round aluminum retainer that is mounted on a wheel hub. Therefore, when the handrim is grasped or struck and pushed downward and forward, in turn, rotating the wheels, the three-dimensional applied loads by MWUs pass the six-axis load cell, and we can detect them. The assembled IWS is presented in Figure 1.


Design and Fabrication of an Instrumented Handrim to Measure the Kinetic and Kinematic Information by the Hand of User for 3D Analysis of Manual Wheelchair Propulsion Dynamics.

Mallakzadeh M, Akbari H - J Med Signals Sens (2014)

(a) The components of the instrumented wheel system (IWS). (A) wheel, (B) handrim, (C) retainer, (D) wheel hub, (E) experimental sis-axis load cell, (F) plexiglas disc, (G) L-shaped slotted beam. (b) The assembly of the IWS. (c) An inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4236804&req=5

Figure 1: (a) The components of the instrumented wheel system (IWS). (A) wheel, (B) handrim, (C) retainer, (D) wheel hub, (E) experimental sis-axis load cell, (F) plexiglas disc, (G) L-shaped slotted beam. (b) The assembly of the IWS. (c) An inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim
Mentions: The handrim assembly is attached to a 15 mm thick round plexiglas disc via four L-shaped slotted beams upon which various size handrims can be mounted. Besides, the distance between handrim and wheel is adjustable. The assembled handrim is mounted directly to the experimental six-axis load cell without connecting to other parts of the wheel. The other end of the load cell is attached to a round aluminum retainer that is mounted on a wheel hub. Therefore, when the handrim is grasped or struck and pushed downward and forward, in turn, rotating the wheels, the three-dimensional applied loads by MWUs pass the six-axis load cell, and we can detect them. The assembled IWS is presented in Figure 1.

Bottom Line: In this regard, the observed data extracted from an inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim are presented to show the output behavior of the instrumented handrim.The recorded forces and torques were in agreement with previously reported magnitudes.However, this paper can provide readers with some technical insights into possible solutions for measuring the manual wheelchair propulsion biomechanical data.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Biomechanics Group, Iran University of Science and Technology, Tehran, Iran.

ABSTRACT
The repetitious nature of propelling a wheelchair has been associated with the high incidence of injury among manual wheelchair users (MWUs), mainly in the shoulder, elbow and wrist. Recent literature has found a link between handrim biomechanics and risk of injury to the upper extremity. The valid measurement of three-dimensional net joint forces and torques, however, can lead to a better understanding of the mechanisms of injury, the development of prevention techniques, and the reduction of serious injuries to the joints. In this project, an instrumented wheel system was developed to measure the applied loads dynamically by the hand of the user and the angular position of the wheelchair user's hand on the handrim during the propulsion phase. The system is composed of an experimental six-axis load cell, and a wireless eight channel data logger mounted on a wheel hub. The angular position of the wheel is measured by an absolute magnetic encoder. The angular position of the wheelchair user's hand on the handrim during the propulsion phase (ɸ) or point of force application (PFA) is calculated by means of a new-experimental method using 36 pairs of infrared emitter/receiver diodes mounted around the handrim. In this regard, the observed data extracted from an inexperienced able-bodied subject pushed a wheelchair with the instrumented handrim are presented to show the output behavior of the instrumented handrim. The recorded forces and torques were in agreement with previously reported magnitudes. However, this paper can provide readers with some technical insights into possible solutions for measuring the manual wheelchair propulsion biomechanical data.

No MeSH data available.


Related in: MedlinePlus