Crash & fall detection

Built for real crashes — not dirt whoops

Sensor fusion that demands impact G and speed collapse together. Tunable in Settings. Never a substitute for emergency services.

What makes detection different

Most apps alarm on a hard bump. AdreneRide validates riding context, impact physics, and tip-over lean before it wakes you — or your contacts.

Gate

Min. riding speed

Crash and fall stay armed only after you have ridden at least the session gate (default 10 km/h, tunable 5–20). Parking-lot shakes do not count.

Crash

G + speed collapse

High G alone is not enough. Primary crash needs impact G plus rapid stop or speed collapse — so steady-speed whoops and trail chatter stay quiet.

Escape

Extreme-G path

Catastrophic peaks (≥ 3.5 G) while recently riding can fire even if GPS has not yet reported the speed drop — covering severe lag in the worst impacts.

Filter

Gradual-stop silence

Soft braking and red-light stops (speed drop without a high peak G) do not alarm — without blocking real rapid-deceleration crashes.

Fall

Lean hold tip-over

Extreme lean (default 60°, tunable) must hold for 1–3 seconds while speed is low — separating a tip-over from a brief lean into a corner.

Response

Alert stack

Full-screen crash/fall alert, optional LED flash and alarm sound, emergency SMS to your contacts, map one-tap SOS, and post-crash no-movement escalation.

How a crash alert fires

1. Riding session

GPS speed must clear the min riding gate so the engine knows you were on the road.

2. Impact signature

~40 Hz accel path with median + EMA filtering; consecutive high-G samples must hold (~125 ms primary, shorter secondary for pocket mounts).

3. Speed context

Rapid deceleration to near-stop or impact speed collapse confirms a crash — not a whoop at cruise.

4. You decide next

Stop the alarm if you are OK. If there is no movement after the wait you chose (default 30 s), escalate to contacts / SMS.

Blackbox telemetry

Separate high-frequency ride recording for post-ride analysis — lean, G, and GPS track playback.

Lean+GBlackbox logging
~40 HzDetection path
LeanAngle
GForce

Tunable in Settings

Rider-facing knobs — filter windows and consecutive-sample math stay fixed so the validation matrix stays sound.

Parameter Options Default
Min. riding speed 5 / 10 / 15 / 20 km/h 10 km/h
Crash sensitivity Sensitive · Balanced · Less (1.0 / 1.2 / 1.5 G) Balanced
Fall lean angle 45–75° 60°
Fall hold time 1 / 2 / 3 s 2 s
Fall max speed 10 / 15 / 20 / 30 km/h 20 km/h
No-movement wait 15 / 30 / 45 / 60 s 30 s

Also on the safety stack

  • One-tap SOS: accident, breakdown, emergency
  • Background GPS while sharing or recording
  • Offline map regions for low coverage
  • Stable map heading at stops — no compass spin

Stable map heading

While moving, the map follows GPS course. When you stop, the last travel direction is held instead of a noisy compass — steady at red lights.

Carry protection on every ride

Enable crash detection in Settings, add emergency contacts, and ride with confidence.

Get AdreneRide