phase difference between two sine waves

[TLE]

Here is how to measure the phase difference between two sine waves.  A while back I asked this forum on how to do this and received some great ideas.  This was the best.  I figured out how to account for the interchannel delay on my own.

Here is how to get the AI Convert Rate to account for the inter-channel delay.  This assumes this property is available from your DAQ card.

Tim

[Coq_Rouge]

If you see in one of postings I have already given a lot of pointers on how to understand how it works. It is a PSD with some modifications taken straight out from lock-in theory. But why is the result from the AC/DC estimators divided with 2? I can fully understand why the signal is negated after the hilbert transform. Also if the reference is not a perfect sine how good is this method then.

[rpula]

Thanks TLE.

I used your alogrithm to find the phase diff and included inter channel delay.

Seems like I am getting closer in my project.

[meepaula]

Hi, just wondering what the frequency refers to that you're multiplying by the recipical of the AI Convert Rate? Is it the frequency of one of the signals or of the daq itself?

[navneet]

I am also interested to know what that frequency you are multiplying with is.

is it the signal frequency?

If it is then will the phase delay vary with signal frequency?

[ravanan]

hi, i neeed to finde the phase difference between current and voltaeg wave form can guys help me.................

[dstrandb]

Hi Ravanan,

Have you tried using the suggestion laid out in this earlier post? The Extract Single Tone Information VI should be useful in this case.