SAMPE Journal - May/June 2020 - 36

FEATURE / AFP INSPECTION

Figure 1. ACSIS in
operation.

phasis on the development of a user interface (UI)
relevant to the USC ML algorithms described in12,
represents scientific worth. The inclusion of an
easily interpretable UI elevates our system to a full
inspection tool that allows for operator integration,
classification correction, and data management
and storage through an off-site server.
EXPERIMENTAL PROCESS
Data Acquisition
The collection of data for analysis is done through
the Automated Composite Structure Inspection
System (ACSIS) developed by Ingersoll Machine
Tools. The data acquisition is accomplished using
4 Keyence LJ-V7080 profilometers mounted to a
Kuka KR120 robotic arm Figure 1. The profilometers are used to capture a 2D height profile of a surface. This height data is then batched and stitched

36

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Figure 2. A grayscale image of AFP part from profilometer scan.

together to create a 3D mapping of a surface.
The ACSIS software then translates this height data into a grayscale image
that has smoothing and contrasting operations performed to provide a clear
and interpretable scan of a part as is shown in Figure 2, which shows a part of a
scanned course. We can see the differences in the grayscale indicating the differences in the height profiles. The darker patches indicate a lower a dip in the
surface while a lighter patch indicates an elevated surface. Through differentiating between these patterns, we distinguish the different defects types, and
in turn train the FCN. It should be noted that this is a pre-cure system. ACSIS
is intended for use principally with thermoset carbon tows, though there are
some preliminary results indicating its ability to capture some dry
fiber materials.
After inspection, our defect
data is logged on a server constructed from a Raspberry Pi 3b+
hosting a MySQL database. The
database that was setup for the
USC system is conceived in a manner that facilitates communication
between three in-house projects.
The latter necessitate access to the
AFP defects database and to export the information in FE format
for further analysis. The server is
linked into the lab network, and
thus is platform independent and
discoverable from any machine on

M AY/J U N E 2 0 2 0

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SAMPE Journal - May/June 2020

Table of Contents for the Digital Edition of SAMPE Journal - May/June 2020

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