Driving Assistance Device Circular Intersection Notification Logic

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Solution Overview

Problem

Existing driving assistance devices provide false notifications when determining potential intersections at circular intersections, as they fail to account for the unique traffic flow structure of such intersections.

Innovation Solution

A driving assistance device that includes an assistance processing portion and a map acquisition portion, which uses host vehicle information and map data to determine if a circular intersection is present in the vehicle's path, thereby disabling unnecessary notifications based on the intersection type.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the driving assistance device provides notification based on vehicle information at intersections, then the reliability of intersection assistance is improved, but false notifications occur at circular intersections

Engineering Contradiction:

Improvereliability of intersection assistanceVSAvoidfalse notification

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system performs preliminary identification of circular intersections using map data before generating intersection assistance notifications. By determining in advance whether the upcoming intersection is a circular intersection, the system can selectively suppress notifications at these locations, preventing false alerts while maintaining reliability at regular intersections

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The notification behavior is made local to the specific intersection type. The assistance processing portion applies different notification rules based on the local characteristic of the intersection (circular vs. regular), enabling targeted suppression of notifications only at circular intersections while maintaining them at other intersection types

Inventive Principle:

Principle #3Local quality

2Productivity

If the driving assistance device uses general intersection detection, then the coverage of assistance is improved, but the precision of intersection type recognition deteriorates

Engineering Contradiction:

Improvecoverage of assistanceVSAvoidprecision of intersection type recognition

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The system segments intersection detection into two distinct processes: general intersection detection (for broad coverage) and circular intersection identification (for precise classification). By separating these functions and using map data for the classification stage, the system achieves both wide coverage and high precision in intersection type recognition

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS10909848B2Driving assistance device

Publication Date: 2021.02.02 DENSO CORP

AI summary

A driving assistance device for a vehicle includes: an assistance processing portion that executes a notification of a possibility of a host vehicle intersecting with an other vehicle based on host vehicle information including information that provides an estimation of a travelling course of the host vehicle and an other vehicle information including information that provides an estimation of a travelling course of the other vehicle and acquired by wireless communication; and a map acquisition portion that acquires map data including data that specifies a circular intersection. The host vehicle information includes a position of the host vehicle. The assistance processing portion prevents the notification based on the circular intersection, which is disposed in front of the host vehicle in the travelling course of the host vehicle, according to at least the host vehicle information and the map data acquired by the map acquisition portion.