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
guiltycornet77 t1_irw4q4t wrote
Reply to comment by designingtheweb 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 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