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#### hbaocr

##### Full Member level 4
hello friends
Plz help me to use ADXL sensor
when I read value from that IC 20 times and receive many different value in one condition of acceleration.So i don't know which value is reliable.Plz help me to find the best suitable value and give me some algorithm to find that value nearby reliable value which error δ value (δ=reliable value- value I choose) is ecceptable.
thank alot

hbaocr said:
hello friends
Plz help me to use ADXL sensor
when I read value from that IC 20 times and receive many different value in one condition of acceleration.So i don't know which value is reliable.Plz help me to find the best suitable value and give me some algorithm to find that value nearby reliable value which error δ value (δ=reliable value- value I choose) is ecceptable.
thank alot

Are U really sure to have a constant acceleration in your testing environment?

It is not easy to set up such environment.

If you didnot set up the right, your data might be right.

put it on a turntable and measure. Then average ..

:idea:,thank all friend , I did following your direction that I sampled signal from ADXL sensor 1000 times and take a Averaged value .But the value I receive consider not changing it's about 1.20Volt ->1.21Volt on all conditions I tested. Even In moving condition , It is still 1.19->1.21 volt.So I can't terminate which level on voltage I receive respond with acceleration X =1g and -1g . In 2 those conditions the Level Voltage value of it stil 1.20->1.21 volt.
Why? And which problem have met? And how to solve that problem?
:idea: give me some Idea to solve it
thank

put it on a turntable and measure. Then average ..

Could U post a graph of your acquired data and a diagram of direction of you accelerometer on the turn table?