Automation Technology MCS 1280 Series, Руководство пользователя

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32 MCS Manual Rev. 1.4
Center Of Gravity Mode (COG)
In this mode the center of gravity of laser beam profile is calculated. For this purpose, the following
parameters are computed:
Position value of the left edge of laser beam profile for a given intensity threshold value P
L
,
Sum of intensity value I
s
= ∑ I
p
,
Sum of first order moment M
s
= ∑I
p
* P .
The position value of laser line (center of gravity of beam profile) is then obtained from:
P
COG
= P
L
+ M
s
/ I
s
.
In addition, the laser line width can be delivered over the Data Output Channel DC1. The average
intensity of the illumination profile can be calculated by normalising the sum of intensity value I
s
with the line width.
The precision of the COG calculation (up to 6 subpixel) can be improved by enabling the
smoothing mode of the FIR filter of the camera.
AO I_TRSH
P
CO G
P
L
I
S