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The
3-D laser system consists of a line laser generator
that paints a laser line across the pour cup. On
the opposing side, a sensor uses its view of the
line to determine the iron level in the cup.
By using this direct measurement method (no interpretation),
the pour stream is ignored and an accurate
realtime
level reading can be obtained.
For cup detection and automatic positioning, the 3-D laser is fitted with
a single point laser.
The 3-D laser system is recommended for all applications
with vertical molding, small pour cups and/or
high production rates.
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| A
single point laser sensor is aimed into the pour
cup, measuring the molten metal level in real time.
The laser makes a direct measurement of the metal
level (no interpretation) and is insensitive to
the metal stream and any other sources of illumination
around the pour cup.
Thanks to the fast response and the active nature
of the laser, it works equally well on molten
metal and black sand, making it well suited for
detecting the pour cup.
Point laser technology is recommended for high
speed applications where access for the 3-D laser
is impractical.
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| A
vision camera looks at the pour cup and counts the
number of pixels illumined by the molten metal.
A large number of pixels is interpreted as a high
metal level, etc.
Since the iron stream and any over pours also
illuminate the camera detector, it is vital to
”°block”± out those areas, reducing the effective
viewing area of the cup.
Active cup detection is not possible, since the
vision camera is not able to detect an empty cup
(black hole) in the black sand.
Vision technology is thus recommended for flask
line applications, where large pouring cups are
used, and no positioning is required.
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