PHASE SHIFT CALCULATION

• Nov 29, 2016

• #2

IRstuff

Aerospace

Jun 3, 2002

44,899

US

?? Wouldn't you just look for the time delta between corresponding rising edges, or somesuch?

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• Nov 29, 2016

• #3

cswilson

Electrical

Apr 5, 2005

683

US

I haven't played with the Arduino itself, but the most likely strategy would involve time-stamping like edges of both square waves. Time between these edges for one waveform is the period, and time between these edges for the two different waveforms is the shift. The ratio provides the fractional shift, which could be expressed as percentage or "degrees".

 

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• Nov 30, 2016

• Thread starter
• #4

January Mahlalela

Electrical

Nov 18, 2016

7

ZA

thank you IRstuff and cswilson fellows i will try that.

 

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• Nov 30, 2016

• #5

PNachtwey

Electrical

Oct 9, 2004

779

US

I would look at the timer/counter section for the micro controller. If you AND phase A with NOT phase B and use that as a gate for a timer/counter. That provides the delay between phase A and phase B. I would use another counter/timer to count the period of the square wave. The trick is to learn how to use the counter timer because they usually count or time at the frequency of the micro controller.

Peter Nachtwey
Delta Computer Systems

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