Document Detail

A telemetry-based device to determine the force-displacement behaviour of materials in high impact loading situations.
MedLine Citation:
PMID:  10673120     Owner:  NLM     Status:  MEDLINE    
Meaningful testing of stab resistant body armour requires the use of realistic body tissue simulants. A device for the determination of the force-displacement behaviour of materials in high impact loading situations has been developed for the testing of such simulants. Force measurement is achieved with the use of electrical foil strain gauges applied to a cylindrical load cell. A piezo-resistive accelerometer (+/- 500 g) is used to calculate the displacement of the device through double integration of its signal, with the impact velocity used as a boundary condition. The signals from the strain gauge circuit and the accelerometer are sampled at 2500 Hz. The data are transmitted to a receiver via telemetry using a 418 MHz FM transmitter and from the receiver to a laptop PC via the serial port. Calibration of the device is described and sample results showing forces up to 2500 N and displacements up to 0.04 m are presented.
E K Chadwick; A C Nicol; S Floyd; T G Gray
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomechanics     Volume:  33     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-03-02     Completed Date:  2000-03-02     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  361-5     Citation Subset:  IM    
Bioengineerinig Unit, Wolfson centre, University of Strathclyde, Glasgow, UK.
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MeSH Terms
Equipment Design
Protective Clothing / standards*
Stress, Mechanical
Telemetry / instrumentation*
Wounds, Stab / prevention & control

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