Measuring vibration-induced variations in pressures between the human body and a seat
Measuring vibration-induced variations in pressures between the human body and a seat
When measuring total dynamic forces between the human body and seats during vibration, variations in force over the buttocks and the thighs have previously been ignored. In this study, sensors in a pressure mat were calibrated by applying static and dynamic pressures through foam and calculating transfer functions between the applied pressures and the outputs of the sensors. This provided static calibration of individual pressure sensors and dynamic calibration of groups of pressure sensors. Measurements of dynamic pressures were used to calculate the vertical forces over the ischial tuberosities, middle thighs, and front thighs and compare with similar measurements obtained by another method. Dynamic calibration of the pressure mat reduced errors in the total dynamic force to 10% at frequencies less than 5 Hz and less than 30% at frequencies between 5 and 15 Hz. Recommendations are offered for measuring dynamic pressures between the human body and seats in vibration environments. Relevance to industry: Dynamic pressure distributions at seat interfaces influence sitting comfort during whole-body vibration. Understanding of the dynamic performance of pressure sensors and recommendations on calibrating and using pressure sensors in vibration environments can assist seat design and other situations where dynamic pressure measurements are of interest.
Pressure mat calibration, Static and dynamic human-seat interface pressures, Whole-body vibration
274-282
Liu, Chi
df69bf48-da73-46c1-a2df-fe8306b5688a
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
1 September 2018
Liu, Chi
df69bf48-da73-46c1-a2df-fe8306b5688a
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Liu, Chi and Griffin, Michael J.
(2018)
Measuring vibration-induced variations in pressures between the human body and a seat.
International Journal of Industrial Ergonomics, 67, .
(doi:10.1016/j.ergon.2018.05.006).
Abstract
When measuring total dynamic forces between the human body and seats during vibration, variations in force over the buttocks and the thighs have previously been ignored. In this study, sensors in a pressure mat were calibrated by applying static and dynamic pressures through foam and calculating transfer functions between the applied pressures and the outputs of the sensors. This provided static calibration of individual pressure sensors and dynamic calibration of groups of pressure sensors. Measurements of dynamic pressures were used to calculate the vertical forces over the ischial tuberosities, middle thighs, and front thighs and compare with similar measurements obtained by another method. Dynamic calibration of the pressure mat reduced errors in the total dynamic force to 10% at frequencies less than 5 Hz and less than 30% at frequencies between 5 and 15 Hz. Recommendations are offered for measuring dynamic pressures between the human body and seats in vibration environments. Relevance to industry: Dynamic pressure distributions at seat interfaces influence sitting comfort during whole-body vibration. Understanding of the dynamic performance of pressure sensors and recommendations on calibrating and using pressure sensors in vibration environments can assist seat design and other situations where dynamic pressure measurements are of interest.
Text
14822 CL-MJG 2018 Author accepted manuscript
- Accepted Manuscript
More information
Accepted/In Press date: 17 May 2018
e-pub ahead of print date: 27 June 2018
Published date: 1 September 2018
Keywords:
Pressure mat calibration, Static and dynamic human-seat interface pressures, Whole-body vibration
Identifiers
Local EPrints ID: 422768
URI: http://eprints.soton.ac.uk/id/eprint/422768
ISSN: 0169-8141
PURE UUID: b969c7c0-64ce-46c4-b974-242bd1803fe8
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Date deposited: 03 Aug 2018 16:30
Last modified: 16 Mar 2024 06:50
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Contributors
Author:
Chi Liu
Author:
Michael J. Griffin
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