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Control Menu, Set Sensor Parameter
optoNCDT 2300
An averaging in two different ranges of the signal processing is possible in the optoNCDT 2300.
- Averaging in video signal
- Averaging of measurement values
The averaging is recommended for static measurements or slowly changing values.
In the sensor, one after another following video curves are averaged pixel by pixel. The effect of different settings can be observed in a
second curve “Filtered signal“ in the web browser in the category video signal.
7.4.4.1 Measurement Averaging
The averaging of measurement values is effected after the calculation of the displacement and thickness values prior to the output via
the interfaces.
The purpose of averaging is to:
- Improve the resolution
- Eliminate signal spikes or
- „Smooth out“ the signal.
Averaging has no effect on linearity.
In completion of the measuring cycle the internal average is calculated again.
i
The preset average value and the number of averaging are to save in the sensor, so that they remain after switching off.
Averaging does not affect the measuring rate or data rates in digital measurement value output. The averaging numbers can also be
used if programmed via the digital interfaces. The sensor optoNCDT 2300 is supplied ex factory with the default setting „Median 9“,
that is, averaging with Median and 9 measurements.
Moving average
The selected number N of successive measurement values (window width) is used to generate the arithmetic average value M
gl
on the
basis of the following formula:
MV (k)
k=1
N
N
M =
gl
MV = Measurement value,
N = Averaging number,
k = Running index
M
gl
= Averaging value respectively output value
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