Improvements to the Witness Pack Analysis System (WPAS)

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Authors
  1. Baillargeon, Y.
  2. Szymczak, M.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The witness packs used to characterise Behind-Armour (BA) Debris are of major concern for the defence research community. In order to quickly and efficiently analyse witness plates, the Defence Research Establishment Valcartier has been developing over the past few years the WPAS (Witness Pack Analysis System). The main work realised by this system consisted in the semi-automated computation of hole count, hole position and hole area assessment from witness plates. However, even with the high accuracy in hole area assessment obtained with a high resolution digital camera, important errors (up to 80%) appear for small or noncircular holes. This report presents a simple and efficient method to improve hole area assessment of witness plates. This method can be applied to correct the assessment of witness plates already analysed and for future analysis. The method consists in the definition of an equation to represent the absolute error based on the hole area, using calibration plate dta and applying it to all witness plates. An error inferior to 10% is now obtained for all the holes ranging from 0.005 to 20 cm2 in area.

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Keywords
Behind-armor debris (BAD);Effectiveness assessment;Witness packs;Hole area;Light tables;Witness plate;Kodak camera;WPAS (Witness Pack Analysis System)
Report Number
DREV-TM-2000-208 — Technical Memorandum
Date of publication
11 Sep 2001
Number of Pages
56
DSTKIM No
CA011721
CANDIS No
516275
Format(s):
Hardcopy;Document Image stored on Optical Disk

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