LIS2DW12 MEMS sensor scales

WBen .2 · ‎2021-07-10

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

TBomb.1 · ‎2021-07-14

"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

View solution in original post

TBomb.1 · ‎2021-07-14

"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