Automatic vehicle crash detection using onboard devices
First Claim
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1. A device comprising:
- an accelerometer to measure acceleration of the device; and
processing circuitry to;
calculate, based on the measured acceleration of the device, an acceleration magnitude value,compare the acceleration magnitude value to a threshold,determine, when the comparison indicates that the acceleration magnitude value satisfies the threshold, at least one feature based on a plurality of acceleration magnitude values, the at least one feature including an N-point pre max sum calculated as a sum of a plurality of acceleration magnitude values corresponding to a window of acceleration magnitude values centered around an acceleration magnitude value that occurs before the acceleration magnitude value that satisfied the threshold,evaluate, when the comparison indicates that the acceleration magnitude value satisfies the threshold, a collision detection model based on the determined at least one feature, the evaluation of the collision detection model indicating whether the device is involved in a vehicle collision, andalert an emergency call center when the evaluation of the collision detection model indicates that the device is involved in the vehicle collision.
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Abstract
Vehicle collisions may be automatically detected and reported based to a call center. The collisions may be automatically detected based on a collision detection model that receives sensor data, or other data, as input, and outputs an indication of whether there is a collision. The collision detection model may be trained on historical sensor data associated with potential vehicle collisions, where the historical sensor data is labeled to indicate whether the data corresponds to an actual collision.
21 Citations
20 Claims
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1. A device comprising:
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an accelerometer to measure acceleration of the device; and processing circuitry to; calculate, based on the measured acceleration of the device, an acceleration magnitude value, compare the acceleration magnitude value to a threshold, determine, when the comparison indicates that the acceleration magnitude value satisfies the threshold, at least one feature based on a plurality of acceleration magnitude values, the at least one feature including an N-point pre max sum calculated as a sum of a plurality of acceleration magnitude values corresponding to a window of acceleration magnitude values centered around an acceleration magnitude value that occurs before the acceleration magnitude value that satisfied the threshold, evaluate, when the comparison indicates that the acceleration magnitude value satisfies the threshold, a collision detection model based on the determined at least one feature, the evaluation of the collision detection model indicating whether the device is involved in a vehicle collision, and alert an emergency call center when the evaluation of the collision detection model indicates that the device is involved in the vehicle collision. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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determining, by a telematics device, three-axis acceleration measurements associated with the telematics device; calculating, by the telematics device and based on the measured three-axis acceleration measurements, acceleration magnitude values; determining, by the telematics device, that the acceleration magnitude value satisfies a minimum threshold value; determining, by the telematics device and based on the determination that the acceleration magnitude value satisfies the minimum threshold value, at least one feature based on a time series of the acceleration magnitude values, the at least one feature including an N-point pre max sum calculated as a sum of a plurality of acceleration magnitude values corresponding to a window of acceleration magnitude values centered around an acceleration magnitude value that occurs before the acceleration magnitude value that satisfied the threshold; evaluating, by the telematics device and based on the determination that the acceleration magnitude value satisfies the minimum threshold value, a collision detection model based on the determined at least one feature, the evaluation of the collision detection model indicating whether the telematics device is associated with a vehicle collision; and alerting, by the telematics device, an emergency call center when the evaluation of the collision detection model indicates that the telematics device is associated with a vehicle collision. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method comprising:
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receiving, by one or more computing devices, sensor data generated by sensors associated with a plurality of vehicles; extracting features from the sensor data, the features including features based on a time series of acceleration magnitude values associated with the plurality of vehicles, at least one of the features including an N-point pre max sum calculated as a sum of a plurality of the acceleration magnitude values corresponding to a window of acceleration magnitude values centered around an acceleration magnitude value that occurs before a particular acceleration magnitude value; associating, by the one or more computing devices, the sensor data with sets of data corresponding to potential vehicle collisions, each of the sets of data being associated with a label indicating whether the set of data corresponds to an actual vehicle collision or a non-collision; and training, by the one or more computing devices and based on the labeled sets of data, a classification model to distinguish between sensor data corresponding to vehicle collisions and sensor data corresponding to non-collisions. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification