designingtheweb t1_iru80s0 wrote on October 11, 2022 at 1:56 AM

Reply to comment by other_usernames_gone in Some iPhone 14 users say the crash detection feature has triggered false alarms and called 911 during rollercoaster rides or after a phone drop while driving by speckz

You can drop the phone upside down, back first, screen first, etc. Any orientation is possible. It can even be spinning. I will be hard to detect down.

guiltycornet77 t1_irw4q4t wrote on October 11, 2022 at 2:18 PM

You don’t need the direction however, just the magnitude of the acceleration in 3D prior to impact. If it is within the ballpark of 9.8 m/s prior to the massive impulse spike caused by it hitting the ground you can disregard the spike as a drop. If the phone is at a resting state/a state with very little acceleration prior to impact (ie a phone on a dash in a car that immediately hits a wall) or has a large magnitude of deceleration (driver hits the breaks quickly before impact) than you can diagnose that as a crash. You don’t need direction of acceleration if you just simplify the problem