Risk Assessment System For Assessing Current Driver Behavior Relative to Past Behavior and Behaviors of Other Drivers

Patent metadata

Field	Value
Publication number	US-2019100216-A1
Application number	US-201715720775-A
Country	US
Kind code	A1
Filing date	Sep 29, 2017
Priority date	Sep 29, 2017
Publication date	Apr 4, 2019
Grant date	—

Abstract

A risk assessment system is provided and includes a behavior description generator, driving behavior comparator, and risk assessment modules and a transceiver. The behavior description generator module receives a set of driving features and topics corresponding to a driving behavior of a first driver in a location and under a set of driving conditions. The driving behavior comparator module: compares the set of driving features and the topics to other sets of features and topics, which correspond to driving behaviors of other drivers for the location and same or similar driving conditions as the set of driving conditions; and generates an anomaly score for the first driver based on results of the comparison. The risk assessment module calculates a risk assessment score for the driver based on the anomaly score, where the risk assessment score is indicative of a risk level of the first driver relative to the other drivers.

First claim

1 . A risk assessment system comprising:
a behavior description generator module configured to at a risk assessment server receive a first set of driving features and topics corresponding to a driving behavior of a first driver of a first vehicle in a location and under a first set of driving conditions; a driving behavior comparator module configured to (i) compare the first set of driving features and the topics to one or more other sets of features and topics, wherein the one or more other sets of features and topics correspond to driving behaviors of other drivers for the location and same or similar driving conditions as the first set of driving conditions, and (ii) generate an anomaly score for the first driver based on results of the comparison; a risk assessment module configured to calculate a risk assessment score for the driver based on the anomaly score, wherein the risk assessment score is indicative of a risk level of the first driver relative to the other drivers; and a transceiver configured to transmit the risk assessment score from the risk assessment server to at least one of a vehicle control module of the first vehicle or a second server, wherein the risk assessment server and the second server are separate from the first vehicle.

2 . The risk assessment system of claim 1 , wherein the risk assessment module is configured to calculate the risk assessment score based on a plurality of anomaly scores of the first driver and anomaly scores of the other drivers.

3 . The risk assessment system of claim 1 , wherein:
the driving behavior comparator module is configured to generate a plurality of anomaly scores for the first driver; and the risk assessment module is configured to (i) based on the plurality of anomaly scores, determine at least one of a probability distribution function or a cumulative distribution function, (ii) compare the at least one of the probability distribution function or the cumulative distribution function to at least one of an average probability distribution function or an average cumulative distribution function, and (iii) calculate the risk assessment score based on the comparison between the at least one of the probability distribution function or the cumulative distribution function for the first driver to the at least one of the average probability distribution function or the average cumulative distribution function.

4 . The risk assessment system of claim 1 , wherein:
the driving behavior comparator module is configured to compare the features and the topics corresponding to the driving behavior of the first driver to past features and topics corresponding to past driving behaviors of the first driver, and indicate whether the first driver is driving more dangerously than in the past; and the risk assessment module is configured to calculate the risk assessment score based on the indication of whether the first driver is driving more dangerously than in the past.

5 . The risk assessment system of claim 1 , wherein the risk assessment module is configured to:
compare the anomaly score for the first driver for a first trip at the location to other anomaly scores for other trips at the location; determine whether the anomaly score for the first driver is an outlier as compared to the other anomaly scores; and based on whether the anomaly score for the first driver is an outlier, (i) determine a new common driving behavior for the first driver and the other drivers, or (ii) determine that the first driver is driving more dangerously than in the past.

6 . The risk assessment system of claim 1 , further comprising the second server, wherein the second server is configured to, based on the risk assessment score, adjust an insurance rate or a pay rate of the first driver.

7 . The risk assessment system of claim 1 , further comprising a latent Dirichlet allocation module configured to determine the topics based on probabilities of the features.

8 . The risk assessment system of claim 1 , wherein the driving behavior comparator module is configured to (i) determine topic proportions for scenes of one or more trips of the first driver, (ii) based on the topic proportions, determine whether the driving behavior of the first driver matches an average or trending driving behavior of the other drivers, and (iii) generate the anomaly score for the first driver based on whether the driving behavior of the first driver matches the average or trending driving behavior of the other drivers.

9 . The risk assessment system of claim 1 , wherein the driving behavior comparator module is configured to:
divide a trip of the first driver into a plurality of scenes; describe the scenes via the topics of the first set of driving features and topics; determine topic proportions for the plurality of scenes; determine feature-proportion information for the plurality of scenes or trends in the driving behavior of the first driver and driving behaviors of the other drivers; and generate at least the anomaly score for the first driver based on the topic proportions and feature-proportion information.

10 . A risk assessment system comprising:
a driving behavior comparator module configured to (i) perform comparisons between sets of features and topics for driving behaviors of a plurality of drivers, wherein each of the comparisons is for a same driving location and same or similar driving conditions, and (ii) generate a plurality of anomaly scores for the plurality of drivers based on results of the comparison; an assessment module configured to, based on the anomaly scores, determine at least one of a common driving behavior or a trend in the driving behaviors of the plurality of drivers for the driving locations and corresponding ones of the driving conditions; and a transceiver configured to transmit information regarding the common driving behavior or the trend in the driving behaviors of the plurality of drivers to a target vehicle for at least one of training a driver of the target vehicle or autonomous control of the target vehicle.

11 . The risk assessment system of claim 10 , wherein:
the assessment module is configured to, based on the anomaly scores, calculate a risk assessment score, wherein the risk assessment score indicates whether the driver of the target vehicle is driving more dangerously than other ones of the plurality of drivers; and the transceiver is configured to transmit the risk assessment score to the target vehicle.

12 . The risk assessment system of claim 10 , wherein:
the assessment module is configured to (i) determine at least one of an average probability distribution function or an average cumulative distribution function for trips of the plurality of drivers at the driving locations, and (ii) based on the at least one of the average probability distribution function or the average cumulative distribution function, calculate a risk assessment score for the driver of the target vehicle; and the transceiver is configured to transmit the risk assessment score to the target vehicle.

13 . The risk assessment system of claim 10 , wherein the information regarding the at least one of the common driving behavior or the trend in the driving behaviors of the plurality of drivers includes at least one of (i) average features of the driving behaviors of the plurality of drivers in the driving locations, (ii) driving patterns for the plurality of drivers driving in the driving locations, or (iii) trends in the driving behaviors of the plurality of drivers driving in the driving locations.

14 . The risk assessment system of claim 10 , wherein:
the driving behavior compa

Assignees

• Denso Int America Inc
• Denso Corp

Inventors

• Volos Haris
• Konishi Kenji
• Takenaka Kazuhito
• Shinohara Yuki
• Misawa Hideaki

Classifications

• B60W2540/30

  Driving style · CPC title

• B60W40/09 Primary

  Driving style or behaviour · CPC title

• G06Q10/0635

  Risk analysis of enterprise or organisation activities · CPC title

• G06Q40/08 Primary

  Insurance · CPC title

• G07C5/008

  communicating information to a remotely located station (transmission systems for measured values G08C) · CPC title