Somat eDAQlite - Peak Valley Matrix; Rainflow

I2773-4.4 en
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Somat eDAQ lite
8.4.2 Peak Valley Matrix
The Peak Valley Matrix DataMode stores multiple channels of peak valley reversal
histograms in the output data file. The eDAQ
lite acquires peaks and valleys from
triggered or un-triggered time history data streams using the user-specified hysteresis
value and the peak valley processing algorithm. The resulting peak valley stream
defines the set of peak valley reversals which are histogrammed using the
user-defined options for the type and size of histogram. For more information on the
peak valley processing algorithm, see “Peak Valley Processing Algorithm” on
page 221.
Input Channel
The input channel data type must be 32-bit float or 16-bit integer. If using the
user-defined bins option, the input channel data type must be 32-bit float.
Histogram Mode
Select one of three available histogramming modes.
Hysteresis
Specify the desired hysteresis level for the peak valley processing algorithm.
Number of Bins
Specify the desired number of bins up to 500 for the histogram. For the range-mean
and the to-from histogram modes, the value is for both histogram dimensions. The
total number of bins per dimension is the user-specified number of bins plus two for
underflow and overflow bins. For the range-mean and to-from histogram modes which
have two dimensions, the total number of bins for the DataMode is the product of the
total number of bins for each dimension.
8.4.3 Rainflow
The Rainflow DataMode stores multiple channels of rainflow cycle histograms in the
output data file. The eDAQ
lite acquires peaks and valleys from triggered or
un-triggered time history data streams using the user-specified hysteresis value and
the peak valley processing algorithm. The resulting peak valley stream runs through
the rainflow cycle counting algorithm to yield the set of closed cycles. The closed
cycles are histogrammed using the user-defined options for the type and size of
histogram. For more information on the data processing algorithms used, see “Data
Processing Algorithms” on page 221.
Input Channel
The input channel data type must be 32-bit float or 16-bit integer. If using the
user-defined bins option, the input channel data type must be 32-bit float.
Mode Description
Range-Mean Accumulate reversal counts in bins with both a reversal range
dimension and a cycle mean value dimension.
Range Only Accumulate reversal counts in bins with only a reversal range
dimension.
To-From Accumulate reversal counts in bins with both a to dimension and a
from dimension. The eDAQ
lite assigns to and from designations to
each reversal.
HBM: public