Fast and low budget automated body armour plastilina dent measurement by a low cost structured light scanner
conference paper
Depth, diameter and volume of dents in clay backing of soft and hard body armour are used to assess the protective performance of such vests. The characteristics of the dents are traditionally measured manually. Optical scan techniques are becoming more popular and provide an objective method compared to the manual method and it allows to archive the scans for later evaluation. However, commercial high end scanners, accuracy in 1-10 μm, are expensive and there is no software available to automatically determine the dent characteristics. Recently low end scanners, accuracy 0.1-0.5 mm became available. An automatic dent measuring method was developed using Matlab to control a DAVID3 Structured Ligth Scanner and process the scans of the clay backing to obtain the dent characteristics. This SLS dent scan system is presented in this paper. Accuracy of the scans is better than the most strict requirement of 0.5 mm. Scan and processing time to obtain the dent characteristics is less than sixty seconds. The traditional method takes about two minutes between each shot. The accuracy and precision is evaluated by comparison of the SLS scan method with a measurement of a dent by a high end but much slower scanner (accuracy < 0.05 mm). A comparison between the manual and SLS method is made by measuring dents for three clay trays with each five calibration dents and for a soft and hard armour BABT performance assessment. It is concluded that the accuracy of the SLS method is better than or equal to the manual method.
TNO Identifier
514907
Source title
PASS 2014 - Personal Armour Systems Symposium, Robinson College, Cambridge, United Kingdom, 8-12 September 2014
Collation
10 p. (Paper 63)
Files
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