Signal integration

[Dejan]

Hello!

Is there a way to integrate a signal using LabVIEW instead of making an integrator (using opamp, for example)?  I'm measuring and recording coil current signal, but I need to get coil flux, so it's necessary  to integrate that signal. I made an integrator but it would be better if there's some way to integrate that signal in LabVIEW. Frequency of the signal is 50 Hz, and it's sine signal, but because  the coil is nonlinear it gets distored after some point.

Dejan.

[Dennis_Knutson]

If you have at least the full version of LabVIEW, there is Numeric Integration on the Analyze>Mathematics>Calculus palette.

[Dejan]

Hello Dennis,

I know there's a vi for numerical integration. But I have integrate the input signal ( wich is waveform type) and I have to get a waveform after the integration. I'm not sure if I can do that with the numerical integration vi because its output is a number.

Dejan

[Dennis_Knutson]

There's also the Time Domain Math Express VI and the Integral x(t) function. With the first, use the Convert To/From Dynamic Data and for the second function, use the Get Waveform Components/Build Waveform.

[053647967]

Hey Dejan, did you manage to do that? I'd also want do do something like you. I'd like to measure BH loop of a core and I need to integrate voltage i get on secondary winding. I get two signals. first is primary currnent, for measuring H and a secondary voltage for measuring B. If I'd be able to integrate voltage I'll be able to measure B. But I don't know how to integrate. I tested it with integration a sinus signal and I got zero, insted of expected cosinus.

Any help would be much appreciated.

Regards