How to get this wave profile
How to get the wave profile of the attached vi.
The waveform is made of oscillition of AC waveform. Only the wave profile is useful.
May I know how to get it out.
Message Edited by turbot on 03-14-2009 07:20 AM
Attachments:
wave.vi 1983 KB
If I understand you correctly, you want the enveloping curve of the signal or the amplitudes of each period?
Some ideas, you posted too little info on the signal:
* chop the signal with a trigger close to zero, then just take the max for each chunk
* Filter out the carrier signal, use a bandstop filter of the frequency
* Do an AM demodulation by multiplying the signal with a square or sine wave of the amplitude and phase of the carrier signal, afterwards do some lowpass filtering (40 Hz).
Felix
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