The irregular sample in PDM data storage

I have a request where I capture data (DAQmx) waveform of several cards of analog interface as I am data capture irregularly timed to an Ethernet network.

The irregular data comes in as an array of values from layer to about 250 Hz with each sample set precisely time-stamped.  Synchronization between the sample is so important so that these data cannot be stored as a waveform.  It should be kept as an array of pairs of channels/timestamp or timestamp value / (array of string values).

DAQmx data, of course, are given waveform with only the timestamp and necessary delta departure.

Then, there are suggestions of popular community (recommended ways) of:

  1. Set a TDMS file for irregular data

  2. Create a single TDMS file for irregular data and DAQmx waveform data in a common format

Thank you

XL600

In this case I used my first string be 'Time' and it is stored as an array of timestamps, where every hour is a value on this index to another channel.  There is a function in the LabVIEW on waveform palette which will take a waveform and generate all the times associated with the values Y.

Oh and so I usually have a new group for each sampling frequency, then you might have DAQ as a group at a rate that is regular, and there a Time column, and another group might be called the series that has a column of data and time to a non-regular rate.

Tags: NI Software

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