Hello, I'm using the signal vector magnitude formula (SVM) to detect people falling through an accelerometer:

SVM = sqrt (x² + y² + z²);

As I am developing a bracelet, I was unable to disregard the gravity value (9.8m / s²) on the axes. I wonder if this is a problem for the application.

I am making an algorithm that when it detects a high acceleration peak through the SVM equation, consider it as a fall. However, as it is a bracelet, the acceleration of gravity is present in the axes in several ways. Is it a mistake not to remove this gravitational value?

Thank you!