Noise removal

[Bezombes frederic]

Hello,
i'm using labview for a DAQ application. I have a bit of noise on the
signal that need to be removed. I'm trying to apply some filters but
i'm having loads of troubles doing that. How can i do that??
Thank you,
Bezombes Frederic
Liverpool John Moores University
UK

[Enrique]

I think more information is needed. You must have an idea on how is the signal you are acquiring in order to apply an appropriate filter with the right parameters.

If your signal is temperature or strain, first make sure you use the appropriate VI from the palette:

Data Acquisition -> Signal Conditioning


Most of the filters are located in:


Signal Processing -> Filters


There is also an AC & DC estimator vi, located in:

Signal Processing -> Measurement

although this is not recommended or may not apply. You need to know your signal.

Always remember to check the shielding of your system.

Finally, do a search at NI for Keyword Search: filter noise". They have a lot of good information and tutorials.

Regards;
Enrique

Message Edited by Molly K on 02-18-2005 11:16 PM

[Ian Bell]

To know what filtering to suggest needs more details of the signal you are
trying to measure (amplitude/frequency, signal type) and the characteristics
of the noise, (random, periodic[eg 50 Hz from mains supply]).

Dependant on the answers to the above there may be several ways of removing
the noise involving either hardware or software.

If you need to discuss this further feel free to contact me at the e-mail
address in the message I have just sent to you by e-mail. I am the NI UK
Field Engineer for the North West of England.

Ian Bell
NIUK

"Bezombes frederic" wrote in message
news:fc3076d0.0202280924.519a8789@posting.google.com...
> Hello,
> i'm using labview for a DAQ application. I have a bit of noise on the
> signal that need to be remov
ed. I'm trying to apply some filters but
> i'm having loads of troubles doing that. How can i do that??
> Thank you,
> Bezombes Frederic
> Liverpool John Moores University
> UK