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Functional Principle, Technical Data
optoNCDT 22xx
Functional Principle, Technical Data
3.
Short Description
3.1
The system consists of an laser-optical sensor and a
signal conditioning electronics.
The sensor uses the principle of optical triangulation,
that is a visible, modulated point of light is projected onto
the target surface.
i
Sensor and controller are one unit.
Depending on the distance the diffuse fraction of the
reflection of this point of light is then focussed on, to a
position sensitive element (CCD-array) by the receiving
lens, which is arranged at a certain angle with respect to
the optical axis of the laser beam.
From the CCD signal the intensity of the diffuse reflection
is determined in real time. This enables the sensor to
compensate intensity fluctuations still during processing
of a measured-value, which it does in a very wide reflec-
tion factor range (from almost complete absorption to
almost total reflection).
Sensor
ILD 22xx
Measuring range
SMR
-0 V (MR)
32760
+5 V (EMR)
64876
>10 V
1
65526
-5 V (SMR)
643
>10 V
1
65524
Voltage
Digital
output
value
1) Depending on the adjustment of the
analog output by error, see Chapt. 6.8.
Definition of terms, output signal
Fig. 2
SMR = Start of measuring range
MMR = Midrange
EMR = End of measuring range
