Create signals that are customized by using the spreadsheet of settings.

Hello

I'm quite new to LabVIEW but I have a complicated program to create. This framework requires a waveform from a spreadsheet of settings, attached.

I have attached a chart of the appearance of the waveform. As you can see the different parameters related to durations and amplitudes of the wave as well as the frequency and the amplitude of the sine wave in the middle.

In addition to this the program must travel creating each waveform in succession that the values in the change of worksheet for each different test.

I managed to read the file in spreadsheet, make a chart from this and then I tried index table online to send to a loop for which would go through each test, but I don't know how to create the waveform of these values. I have tried to use the labView signal generators to create individual sections of the wave but struggled.

Thanks for any help.

Combine the GERD and my suggestions.  I had not used the Signal generation pallet front screw, but they manage most of the "math" for you.  The key step, you have to decide is what interval to use for "dt", "quantum" time, usually the same as the sampling interval.  Looking at your picture of waveform, you have a pulse, a ramp, a series of sinusoids, another ramp and a final push.  When you look at an individual Palette, it has parameters "dimensionless" you need to adjust to your particular situation.

Consider the ramp time T3, starting at V1 and ends at V3.  Assume that your sampling interval is "dt".  You samples, end, thread and start entries in the ramp model based on the samples as follows:

  • samples = T3 / dt
  • end = V3
  • Start = V1

Since you continue where you left it, I think that you do not want to "exclude the end?" thread true (to avoid double points), but I could be wrong on this matter.

To the sinusoid, you have need samples, amplitude, phase and cycles.  Samples is again the total length of the sinusoid divided by dt.  The amplitude is one, phase is 180 (notice that your sinusoid starts negative), and cycles is however several cycles you want during the period of the sinusoid.  This sine wave, however, will be about 0, so you will need to add the offset constant V3 on the table.

After having assembled all the pieces of this wave form complex and are concatenated berries resulting from it, have to turn them into a proper waveform.  Drop a wave function of building on the block diagram, drag to the top of its upper part a 'click' to expose dt and wire in dt and your table (Y).  You now have a good waveform.

Bob Schor

Tags: NI Software

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