Measuring frequency and phase angle

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CarltonDranko

Joined Dec 30, 2020
22
if an acs712 current sensor measures ac current , can't it measure frequency of the supply ??? If so howcan it be done or the calculation involved
 

Marley

Joined Apr 4, 2016
450
The ACS712 does not measure AC current on its own, it simply outputs a voltage proportional to the instantaneous magnitude of the input current. You would have to construct some kind of instrument that can take this voltage and convert this to a value.
A digital oscilloscope could be used to see the output voltage and would display the frequency. To determine the value of the current you would have to apply a scaling factor to the oscilloscope reading.
 

crutschow

Joined Mar 14, 2008
28,551
if an acs712 current sensor measures ac current , can't it measure frequency of the supply ??? If so howcan it be done or the calculation involved
The output of the acs712 is a voltage linearly proportional to the current, so you will see the frequency of the supply in its output voltage.
You could then measure the frequency with an oscilloscope, a frequency-to-voltage converter, a counter, or a microprocessor.
Frequency, of course is just the inverse of one cycle period time.

Don't know why you mentioned phase angle in your post title, since phase has nothing to do with measuring frequency.
 
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