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## noise signal detrending through a mathematical method

`I'm new here. I have measurement data (deformation of a building) that contains a noise signal that results from the temperature. The temperature is also available. My task is to use a mathematical method to eliminate the interfering signal How could I best eliminate them?`

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Message 1 of 9
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## Re: noise signal detrending through a mathematical method

Find the frequency of the noise and eliminate it using a filter.  Need a lot more info and example signals to tackle your problem

Message 2 of 9
(928 Views)

## Re: noise signal detrending through a mathematical method

Sensors were placed on a bridge to measure the deformation. These sensors provide the deformation over a certain time. The problem is that in the measured deformation part from the temperature is located, which is subordinate and must be filtered out. The temperature was also measured and exist.

I have two Photos attached

Message 3 of 9
(902 Views)

## Re: noise signal detrending through a mathematical method

This is just images without data... Could you run FFT on both channels to see which frequency needs to be filtered out?

Message 4 of 9
(881 Views)

Hello,

Do you know why?

Message 5 of 9
(868 Views)

## Re: noise signal detrending through a mathematical method

Hello

i have attached the file belw

Message 6 of 9
(852 Views)

## Re: noise signal detrending through a mathematical method

Is that expected to look something like this?

Message 7 of 9
(834 Views)

## Re: noise signal detrending through a mathematical method

I don't think so.

My task is to find a mathematical method to eliminate the Influence of temperature on deformation. The Compensated signal would have to be like the Original one but with low fluctuation.
Message 8 of 9
(820 Views)

## Re: noise signal detrending through a mathematical method

Hi Mah,

Wouldn't a low-pass digital filter catch the slow deformation induced by temperature changes?  Say anything less than 5 Hz?