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colorCONTROL flexible-application colour sensors
Uhingen. Whether for allocation, packaging, storing or sorting purposes: high-resolution
colour sensors are always needed when producer goods in any variety of colours need
to be reliably recognised, allocated or compared. Thanks to numerous innovative
features, the new ELTROTEC colorCONTROL line of colour sensors can now be used
even more flexibly when it comes to analysis or linking to production processes.
Here users benefit from being able to teach in, show
and compare both pure RGB colour data and other
L*a*b colour data (XYZ data) transformed in a "true-colour" process, including the corresponding
tolerances. Models are also available with a very
practice-related "multiple teach-in" system, which
enables clearance, angular deflection and colour
fluctuations - in adaptation of application tolerance levels - to be "taught" to the
production machine simply by pressing a button.
The colour sensors come as optical fibre sensors or as reflex optical sensors with ranges
from 2 to 1200 mm and a light spot diameter of 0.5 to 70 mm for large-area integral
colour evaluations through to colour cable detection as of diameters of 0.5 mm.
The reflex colour sensors have point-focal illumination optics as well as large-surface
diffuse optics which light up a surface from various angles. The advantage here is that
gloss effects on surfaces can be reduced or eliminated, which standard sensors are not
able to do. Just like the human eye, these sensors apply the "true colour" measuring
principle and can reliably recognise shades of colour in the range of ?ε=1. Dual-channel
versions are also available. In this case one channel can be used as a reference while
the other channel constantly observes a colour flow for any deviation. This method is
particularly significant for long-term colour detection or for recognising colours in
conditions with fluctuating temperatures, since the same source of light is used as a reference for both channels. The series comprises 3, 4, 8, 31 and 250 colour memories
with up to 25,000 colour comparisons per second.
The sensors can easily be integrated into any machine or network by means of
PNP/NPN switching terminals and of RS 232, USB and Profibus interfaces. Colour
sequences that have been "taught" can be logically combined and can be connected to a
terminal as a good / bad function for a standard evaluation of complex colour inquiries.
Depending on the type of sensor, a colour may be entered with the "teach-in" system or
may be parameterised with the Eltrotec colorCONTROL software program. As a
technological highlight, the LEDCONTROL colour camera solution with applied optical
fibres was developed in order to be able to test the function of colour LEDs or lamps in
terms of colour, brightness and wavelength at 100 different points on the circuit boards
of testing devices.
The use of achromatic colours and glossy colour structures such as those that occur in
the area of varnishes, leather, textiles and interior decorating or also of shiny metals can
be recognised particularly reliably nowadays when compared to the results of standard
RGB sensors used in industrial processes.
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