does anyone know how to calculate the impedance using waveforms

[studentproject]

does anyone know how to calculate the impedance using waveforms?

[altenbach]

What do the waveforms represent?

[studentproject]

the waveforms represent the voltage and current values across a capacitive load. I am trying to find out if there is a way to do automatic calculations using the inputs from the waveforms

[crossrulz]

You would need to know both the Voltage and the Current wavforms.  From there, it is V/I = R.  If you need actual impedance (which has resistance and reactance parts), then you get into fun with complex math.

[crossrulz]

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@studentproject wrote:

the waveforms represent the voltage and current values across a capacitive load. I am trying to find out if there is a way to do automatic calculations using the inputs from the waveforms

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Hopefully a single sinusoid tone.  Otherwise things get really interesting.  Also know that impedance is based on the frequency.  I'll have to dig into this again.  I have not had to calculate an impedance in well over 10 years.

[studentproject]

Can the program do the measurements on the computer?

[crossrulz]

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@studentproject wrote:

Can the program do the measurements on the computer?

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It can do whatever you program it to do except tell you your requirements.

[altenbach]

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@studentproject wrote:

Can the program do the measurements on the computer?

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Once you have the waveform measured, it is just a calculation. Do you also need help with the measurement of the waveforms?

[studentproject]

I found out how to measure the waveforms. I'm working on a project for school, the teacher wants me to use the waveforms themselves as an input for the impedance calculations, in order to get the proper phase angle on the current in order to determine the impedance in the circuit. I understand the math behind it for plugging in values myself but I haven't been able to find a way in order to use the waveforms themselves as opposed to the amplitudes measured. I am just trying to find out if there is actually a way to use the waveforms themselves or if I would need to use a formula node to set up all the calculations needed and just plug the values in by hand.

[pjr1121]

The waveforms you have simply contain the voltage and current values to be used in the calculations.  If you understand the math and can do the calculation using other means (excel or a sheet of paper) then  all you have to do is impliment the same math operations in LabVIEW.  I don't understand where you are having a problem.  Is it in understanding what a waveform is? or is your issue in realizing the math operations?

Perhaps if you re-phrase your question.