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 Frequency counter from tach signal		  New Topic  Reply to Topic
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seiwon

Canada
4 Posts
Posted - 10/15/2010 :  1:52:35 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): 8.5 SR0
Operating System:XP SP3

Dear Sir/Madam,

I captured tach signals whose wave form is sinusoidal one.
Amplitufe is 30 mV or so and speed is keep on changing.
It was saved into ASCII format.

Is there any way to read the speed or count the signal frequewncy from the raw tach data on ORIGIN?

If yes, please let me know how to do it.
It will be greatly appreciated if you give me any clue to that.

Best Regards,


Jeongsoo

cpyang

USA
1406 Posts
Posted - 10/15/2010 :  9:32:03 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
You need OriginPro and use Short-Time Fourier Transform (STFT)

See

http://www.originlab.com/index.aspx?go=Products/Origin/DataAnalysis/SignalProcessing/STFT


CP
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