Vehicle Collision Avoidance Device Center Line Detection

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Solution Overview

Problem

Existing collision avoidance technologies face challenges in effectively managing collisions with oncoming vehicles, as their dynamic location and unpredictable behavior make it difficult to execute accurate steering and braking controls without risking collisions with other objects or influencing nearby vehicles.

Innovation Solution

A collision avoidance device and method that utilize a combination of millimeter wave radars and a monocular camera to sense and attribute oncoming vehicles, determining if they cross the center line, and execute notifications or collision avoidance operations based on acquired attributes, including distance, relative velocity, orientation, and overlap ratio, to ensure safe steering and braking assistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If collision avoidance control is executed on an oncoming vehicle, then collision avoidance capability is improved, but unnecessary interventions occur when the driver has already recognized the object

Engineering Contradiction:

Improvecollision avoidance capabilityVSAvoiddriver burden

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system uses eye tracking technology to obtain the driver's line of sight and determines whether the driver is gazing at the oncoming vehicle. This feedback mechanism allows the system to adjust its notification and collision avoidance execution based on the driver's awareness state, preventing unnecessary interventions when the driver has already recognized the hazard.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary assessment by acquiring the driver's line of sight information before executing collision avoidance control. By determining in advance whether the driver is aware of the oncoming vehicle through eye tracking, the system can conditionally execute or suppress collision avoidance operations, avoiding unnecessary actions that would burden the driver.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If collision avoidance control is executed on an oncoming vehicle, then collision avoidance capability is improved, but collisions with other objects may occur due to dynamic location and unpredictable behavior

Engineering Contradiction:

Improvecollision avoidance capabilityVSAvoidcollision risk with other objects

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary assessment by determining whether the oncoming vehicle crosses the center line before executing collision avoidance control. This advance evaluation of the vehicle's trajectory and position allows the system to conditionally execute or suppress collision avoidance operations, reducing the risk of collisions with other objects while maintaining effective collision avoidance capability.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If collision avoidance notification is provided for all detected objects, then collision avoidance coverage is improved, but driver burden increases due to notifications for recognized objects

Engineering Contradiction:

Improvecollision avoidance coverageVSAvoiddriver burden

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system uses eye tracking technology to obtain real-time feedback on the driver's line of sight and determines whether the driver is gazing at the detected object. This feedback mechanism enables selective notification - providing collision avoidance notifications only when the driver is not already aware of the hazard, thereby maintaining comprehensive collision avoidance coverage while reducing unnecessary notifications that would burden the driver.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables precise collision avoidance with oncoming vehicles by accurately determining the need for collision avoidance and reducing unnecessary interventions, thereby enhancing safety and reducing the risk of collisions with other vehicles or objects.

Implementation Method 1

a first millimeter wave radar provided at a front center of the vehicle and configured to detect an oncoming vehicle in front of the vehicle

Methodology Applied

Scientific EffectRadar: Radar

Implementation Method 2

a second millimeter wave radar provided at a front side of the vehicle and configured to detect an oncoming vehicle, a monocular camera

Methodology Applied

Scientific EffectOptical detection: Photography

Data Source

PatentUS11260853B2Collision avoidance device and collision avoidance method for vehicle

Publication Date: 2022.03.01 DENSO CORP

AI summary

A collision avoidance device for a vehicle is provided. The collision avoidance device includes an object sensing unit for sensing an object, an attribute acquisition unit for using a sensing result from the object sensing unit to acquire an attribute of an oncoming vehicle, and a collision avoidance execution unit for executing at least one of a notification of a possibility of collision and a collision avoidance operation, if it is determined, based on the attribute acquired by the attribute acquisition unit, that the oncoming vehicle crosses a center line.