Average sensor value. I need Help

yasko · Oct 2, 2008

Ok I need a little advice. I'm using ML1200 and pressure sensor to calculate water level in one tank. When tank is in lowest level water fall and make a waves and they make my sensor incorrect. I want to take values each .1 or .2 seconds up to 20-30 values to calculate average and use it in my program. I tried few ways but no success

any advices or suggestions ?

ctw3 · Oct 2, 2008

Have you tried a FIFO to capture the value, then some maths to add and divide?

cheers

Norml · Oct 2, 2008

Have you tried searching this forum? There have been several threads dealing with this exact issue. Search for moving averages, FIFO etc.

TConnolly · Oct 2, 2008

Instead of averaging you could try a first order lag filter. Less programming and CPU resources.

Mickey · Oct 2, 2008

Alaric said:
Instead of averaging you could try a first order lag filter. Less programming and CPU resources.

Ditto, heres what I use.

FV=FV+C(NV-FV)
Where:
FV= Filtered value
C= constant (range 0.0-1.0) The smaller the number the more dampening.
NV= New Value

John Hawkins · Oct 2, 2008

done this

Place a very small in-line orifice in series with the sensor

Average sensor value. I need Help

yasko

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ctw3

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Norml

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TConnolly

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Mickey

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John Hawkins

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