Qualifying automatic vehicle crash emergency calls to public safety answering points

摘要

The present application provides methods for in-vehicle emergency telematics devices and systems to automatically qualify vehicle crash events before directly placing a 3-digit emergency call from an in-vehicle TCU to a local PSAP operator. The qualification is performed in two stages. The first stage produces a qualified crash detection decision wherein a preliminary crash detection based on impact sensors is qualified by crash related non-impact sensors and vehicle telemetry data. The second stage uses an injury severity prediction algorithm to score the detected crash and produces a decision as to whether the crash warrants an emergency call to the PSAP operator.

主权项

1. A method comprising:
receiving accelerometer data indicating a change in a motor vehicle velocity; processing the accelerometer data to determine acceleration amplitude versus time date; determining a preliminary crash detection decision indicating that the motor vehicle may have experienced a crash when the acceleration amplitude is greater than a predetermined accelerometer threshold; determining a time associated with the preliminary crash detection decision; receiving velocity data of the motor vehicle; processing the velocity data to determining amplitude of change in velocity versus time data at time data associated with the preliminary crash decision; and determining the motor vehicle has experienced a crash if the amplitude of change in velocity data is above at least one of a predefined velocity threshold or a percentage change velocity threshold when the value of the acceleration amplitude data was determined to be greater than the predefined accelerometer threshold.