Method to record "Time wave form and FFT graph result data" of analog input voltage signal (It is input for 100 seconds) in the Excel form file.

[kealeo]

Please teach the method of recording "Time wave form and FFT graph result data (Every time)"

of the analog input voltage signal (It is input for 100 seconds)

in the Excel form file.

Vi in the stage is appended while I do the programming.

[kealeo]

Please teach the method of recording "Time-domain wave form and FFT power spectrum graph result data (Every time)"

of the analog input voltage signal (It is input for 100 seconds)

in the Excel form file.

Vi in the stage is appended while I do the programming.

[devchander]

If you are looking at saving the value part ( Y and maginitue arrays) of waveform and power spectrum, here is a simple way to do it.

Just extract the values from both clusters and write to a file

Look at attached VI

Regards

Dev

[kealeo]

Thank you very much

but, my labVIEW version is 6.1. 

So,If you can,

please send the sample of 6.1 version ,or,  block diagram picture.

I'm college student.

Now,I use labVIEW for my reserch.

Thank you very much for your kindness.

[devchander]

Hi,

since i do not have LabVIEW6.1, I am sending a pic of block diagram

Hope this helps

Any doubts, plz do get back

All the best

Dev

[devchander]

The one connected to waveform signal is 'get waveform components' function

for Power spectrum, use 'unbundle by name' function

[kealeo]

Thanks a lot.    

I could record time-domain wave signal(y) & FFTspectrum (magnitude) data for your advise.

If you can,

please teach me how to record time-domain wave signal(x) &  FFTspectrum (frequency) data.

Thank you very very much .!!!!!!!!!!!!!!

[devchander]

Well, your x axis values of a waveform are derieved using the waveform components 't0' first point and 'dt' interval between data points

Your first x axis array value will be = t0.

the next value  t1=t0 + dt

t2= t1+dt and so on

Similiarly for frequency spectrum, f0 is the start frequency of spectrum in Hz and df is the frequency resolution.

f1=f0+df, f2=f1+df etc.

Now, i suggest you find the number of elements in the magnitude/y values array using 'array size' function and

generate a series of that size using the (t0,dt) and (f0, df) of this size

Take it up and you should be able to do this part by yourself.

If not, let me know and i will paste a pic of a sample code to do this.

Regards

Dev

Message Edited by devchander on 01-19-2006 03:36 AM

[kealeo]

Thank you .

But, I don't understand how to use "array size vi".

So,please send pic.

Now,I send you my vi.(Analog signal ⇒sin wave signal)

[kealeo]

My vi