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Design and calibration of pinch force measurement using strain gauge for post-stroke patients


Alsayed, Abdallah and Raja Ahmad, Raja Mohd Kamil and Ramli, Hafiz Rashidi and As'arry, Azizan (2019) Design and calibration of pinch force measurement using strain gauge for post-stroke patients. International Journal of Integrated Engineering, 11 (4). pp. 40-50. ISSN 2229-838X; ESSN: 2600-7916


Two fingers strength is an indicative measurement of pinch impairment. Conventionally, Fugl Meyer Upper Extremity Assessment (FMA-UE) is the primary standard to measure pinch strength of post-stroke survivors. In literature, the evaluation method performed by the therapist is subjective and exposed to inter-rater and intra-rater reliabilities. Recently, force-sensing resistors were implemented to measure two fingers force, but these sensors are subjected to nonlinearity, high hysteresis, and voltage drift. This paper presents a design of pinch force measurement based on the strain gauge. The pinch sensor was calibrated within a range of between 0 N to 50 N over a pinching length of 20 mm with a linearity error of 0.0123% and hysteresis of 0.513% during the loading and unloading process. The voltage drift has an average of 0.24% over 20 minutes. The pinch force measurement system reveals an objective pinch force measurements in evaluating the rehabilitation progress of post-stroke patients.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.30880/ijie.2019.11.04.005
Publisher: Penerbit UTHM
Keywords: Post-stroke rehabilitation; Fugl Meyer; Pinch force; Objective assessment; Strain gauge; Arduino Due
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 09 Sep 2020 08:15
Last Modified: 09 Sep 2020 08:15
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.30880/ijie.2019.11.04.005
URI: http://psasir.upm.edu.my/id/eprint/81098
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