make a full wave rectifier using labview

[Imano88]

hello please I need help in how can i build a full wave rectifier using labview !!! thank you

[RavensFan]

A full wave rectifier is hardware.

LabVIEW is software.

Your question doesn't make sense.

[ADrexelDragon]

You want to make the values always positive? If so, just take the absolute value of the signal. 

[Imano88]

hello 

my target is to get an envelope EMG signal , so i have to full rectify the Raw EMG signal then low pass filter it , but I can't get the real envelope signal as shown in the attached pic below

[johnsold]

You should probably keep everything in your original thread.

As has been mentioned Absolute value is the mathematical equivalent of rectification.

Lynn

[bocasy]

Dear Imano88,

The simplest solution is to use an absolute value and a low pass filter wich can filter the unwanted signal/noise.

If you still have problems implementing this functionality please upload a file containing the measured data so we can help you.

Regards,

Andrei B.

[David-n-MO]

All right youse LabVIEW yahoos, answer me this.

I'm trying to use the absolute value vi to full rectify an I16 binary waveform from a PXIe-5122.  But what I get is not quite a fully rectified waveform (see attachment).   wasup?

[RavensFan]

That's just a picture of the front panel.  How can we figure out what is going wrong?  Post the VI, preferably with some data saved in it as default so we know what you are trying to do.

[johnsold]

The maximum positive value for I16 is 32767. The maximum negative value is -32768.  How do you express the absolute value of -32768 in I16? You cannot.

Lynn

[natasftw]

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@David-n-MO wrote:

All right youse LabVIEW yahoos, answer me this.

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When you admit you're in an inferior intellectual position, do you really think it's wise to make fun of the people you're hoping will help you?