Delete Noise (Filter)

[Stirl]

Hi @ all,

have on my signal from the pressure sensor a horrible noise factor (it is amplified). I´m really sure that the effect comes from the ambient power wires (lights, PC etc...)

It is 50Hz.

I tried to decimate it with a filter. It works fine... but i am not sure if i had done the right thing. The signal is read with a speed higher than 100Hz to 1.8kHz.

I attached my result and which filter i´m using.

I would be glad if anybody can give me a statement about it.  

Cheers

[Stirl]

Here the Attachments...

[Dennis_Knutson]

Since Measure is an old add-on program for Excel, you should post to a more appropriate board.

[Ipshita_C]

Hi Sirit,

As your signal is amplified, you need to be able to take the low frequency (and low amplitude) signals and reject the higher frequency signals. You need a low-pass filter for this purpose--the Chebyshev filter is a lowpass filter and actually has smaller absolute errors. Your cutoff signal looks fine to me.

Ipshita C.