4-5. Crash data

When a crash is detected by the telematics SDK Damoov platform immediately informs 3rd party platform via notification services. The notification contains overall information about the incident.

Meanwhile, The telematics SDK transfers a high-frequency buffer of crash information.

Buffer frequency:

iOS: 60Hz
Android: 100Hz

Size of the buffer:

5 seconds before the crash and 5 seconds after the crash

Header

{"Id":"b369587a-15ca-4322-95a4-971e88dc48aa",
"Type":"Accident",
"AccidentTrigger":"ACCELERATION_LOW_SPEED_THRESHOLD",
"Reliability":2.497596245457438,
"TimeStart":1632473113173,
"Duration":40996,
"PureDuration":28359.35888671875,
"SpeedStart":0.1039,
"SpeedStop":21.80572194328226,
"SpeedMedian":0.7740738640764255,
"AccelerationLateral":1.0586568693806215,
"AccelerationDirect":0.085728685260066,
"AccelerationVertical":9.019821108595995,
"AccelerationLateralEnd":-0.2214526692969265,
"AccelerationDirectEnd":0.6247857121992172,
"AccelerationVerticalEnd":9.90359047986427,
"PointStart":{"Latitude":60.02471350213658,"Longitude":30.215844040847344},
"PointEnd":{"Latitude":60.02418129538941,"Longitude":30.219847877314415},
"RangeDirect":{"Min":-48.0436,"Max":13.4465,"Median":0.0215,"Quantile_95":2.4294,"Quantile_05":-1.9389},
"RangeVertical":{"Min":-12.9587,"Max":35.6981,"Median":9.8439,"Quantile_95":10.4624,"Quantile_05":8.4513},
"RangeLateral":{"Min":-36.8785,"Max":12.1665,"Median":-0.0078,"Quantile_95":2.7568,"Quantile_05":-0.7967},
"Accuracy":{"Min":3.4062,"Max":3.556,"Median":3.4535,"Quantile_95":3.5052,"Quantile_05":3.4114},
"Speed":{"Min":0,"Max":21.8057,"Median":0.1039,"Quantile_95":20.6837,"Quantile_05":0}}

Header Description

ObjectDescription
IdId of event
TypeType of event
AccidentTriggerReason of trigger
Reliability
TimeStartTime of event start UTC
DurationDuration of all event points
ms
PureDurationDuration of event points with acceleration higher then threshold
ms
SpeedStartGPS speed at the beginning of event
Comes directly from phone GPS sensor
m/s
SpeedStopGPS speed at the end of event
Comes directly from phone GPS sensor
m/s
SpeedMedianMedian GPS speed during the event
Comes directly from phone GPS sensor
m/s
AccelerationLateralAcceleration at the beginning of event that perpendicular to direction of movement;
m/s2
AccelerationDirectAcceleration at the beginning of event that is aligned with direction of movement;
m/s2
AccelerationVerticalVertical Acceleration at the beginning of event
m/s2
AccelerationLateralEndAcceleration at the end of event that perpendicular to direction of movement;
m/s2
AccelerationDirectEndAcceleration at the end of event that is aligned with direction of movement;
m/s2
AccelerationVerticalEndVertical Acceleration at the end of event
m/s2v
PointStartCoordinates of event start point
PointEndCoordinates of event end point
RangeDirectAggregated metrics during all event window:
Min, Max , Median, Quantile_95, Quantile_05
RangeVerticalAggregated metrics during all event window:
Min, Max , Median, Quantile_95, Quantile_05
RangeLateralAggregated metrics during all event window:
Min, Max , Median, Quantile_95, Quantile_05
AccuracyAggregated metrics during all event window:
Min, Max , Median, Quantile_95, Quantile_05
SpeedAggregated metrics during all event window:
Min, Max , Median, Quantile_95, Quantile_05