The optical gauge system was applied to a large set (100 pieces) of E-cores whose dimensions had been manually measured at the Polfer (Warsaw, Poland) ferrite core producing factory using the currently standard gauging technique. High degree of correlation between the manual and the computer-based, optical measurements was observed.
An example of an E-core is shown in figure 2.
The dimensions measured are explained in figure 10.
Here, we present the results of measurements for one of the dimension,
namely, .
The comparison is represented by the three plots shown in
figures 11, 12 and 13.
Figure 11 is the distribution of
the
values obtained with the previous matching
procedure [6]. Figure 12 was obtained by the presented
HD-based procedure, while the last plot shows the reference
manual measurements done by the core producer (Polfer).
The plots testify that
the three measurements are consistent, with the HD-based one being
closer to the manual one in the shape of the distribution, which
is single-peak.