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LIS2DW12 MEMS sensor scales

WBen .2
Associate II

Hello everyone, 

I hope you are well and in good health.

I am currently working on an academic project "Parking Barrier Command". For this application, I am going to use the MEMS sensor LIS2DW12.

Checking the sonor specifications, it shows me that it has full user selectable scales of ±2g/±4g/±8g/±16g (from what I understand, the unit "g" refers to the sensitivity of the measurements).

I am wondering what is the proper sensitivity value among the previously mentioned scales that I should select in order to have a good system performance ?

In other words, how to know the right value that matches the desired application?

Thank you in advance

1 ACCEPTED SOLUTION

Accepted Solutions
TBomb.1
Senior II

"g" usually refers to the gravity acceleration, 9.8m/s^2.

The correct full scale depends upon your application: the 2g FS is the one with highest resolution, in the sense that is capable to sense down to 0.244mg (=2.4mm/s^2) acceleration.

So it depends whether you are interested in sense small acceleration sacrificing the "high g" events (>2g) just managing slow motions of the parting barrier, or you want to be able to detect also 16g events, such as hits on the parking barrier.

Tom

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1 REPLY 1
TBomb.1
Senior II

"g" usually refers to the gravity acceleration, 9.8m/s^2.

The correct full scale depends upon your application: the 2g FS is the one with highest resolution, in the sense that is capable to sense down to 0.244mg (=2.4mm/s^2) acceleration.

So it depends whether you are interested in sense small acceleration sacrificing the "high g" events (>2g) just managing slow motions of the parting barrier, or you want to be able to detect also 16g events, such as hits on the parking barrier.

Tom