ipf electronic PY740020, Руководство пользователя

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MANUAL [ PY740020/21 ] • Subject to alteration! Version: 10.10.2018
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5.5 EDGE HEIGHT/ OBJEC HEIGHT / GAP DEPTH
The minimum height of the step of the object to be detected by the sensor as an edge. If the step is smaller
than the value entered here, it is not detected as an edge. As standard, this height is set to 4 mm.
This threshold is set in 1 mm steps, where 0 mm corresponds to the smallest adjustable edge height.
5.6 OBJECT
To improve sensitivity to dark objects, the exposure time can be increased. At the same time, the measuring
repeat time changes as well.
Object: Light (reflectivity > 18%)
Pulse duration Short
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Object: Dark (reflectivity > 18%)
Pulse duration Long
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5.7 PRECISION
Time filtering with median and average is used to filter out interference in the sensor and smoothen the output
signal.
Average
Moving averages (also known as rolling or running averages) reduce the existing variation in a series.
Therefore they are frequently used to smoothen series.
Median
The median refers to a line between two halves. In statistics the median divides a distribution into two halves.
Compared to the arithmetic mean, also known as average, the median has the advantage of being more
resistant to freak values (extremely deviating values).
The following filter values can be selected:
Standard = No Filter
High
Very high
The filter details can be found in the data sheet in Section 6.1.
The higher precision is set, the more response and release time are increased. The measuring frequency, on
the other hand, is not dependent on the selected filtering.
Depending on the circumstances in the customer application, it is possible to improve repeat accuracy up to a
factor of 4 by filtering.
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In accordance with data sheet in section 6.1.