07-09-2014 05:46 AM
Hi,
I am rookie in labview,
I have signal from the sensor vibration look like
In one group of "pulse" there are some vibration, I have try to make this signal become one "big pulse" so from this graph the result is just two pulses.
is there any possibility using labview?
07-09-2014 10:25 AM
In thory yes, but there are some issues that need to be cleared up -- a really high noise floor, compared to the data. For example, the ringing at the beginning of the sample, is that really there or is that electrical?
Mike...
07-09-2014 07:15 PM
Hi Mike,
Yes, I have tried to reduce the noise, I will try to reduce more.
There is a DC offset near, I just tried to add with a number to make it 0.
another posibility is to make this signal digital, so the noise on the floor is gone.
but I do not know how to make several signal in the nearest place become one pulse
07-09-2014 08:09 PM
Once the noise/interference is dealt with, you can have a look at this:
07-09-2014 09:31 PM
07-09-2014 11:29 PM
Thx for all the sugestions,
I have try with Fast Hilbert Transforms like in http://zone.ni.com/reference/en-XX/help/371361H-01/lvanlsconcepts/hilbert_transform_analytic/
here the part of my VI
but the result is not that I want, the waveform in graph 21 is the same with the graph 17.
or I made mistake with the program?
07-09-2014 11:45 PM
Please attach the data in array (Set the values as default or make a constant) inside LabVIEW. It will be good if you can attach the code in 2011 version.
07-09-2014 11:55 PM
Just try plotting the "r" output of the RE/IM -> R/Theta function.