Parking Assist Device Steering and Speed Control

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Solution Overview

Problem

Conventional parking assist devices face challenges in achieving high accuracy for parking position due to difficulties in maintaining consistent steering angle control and vehicle speed, leading to potential inaccuracies and unnatural driving experiences.

Innovation Solution

A parking assist device that integrates automatic steering and vehicle speed control using cameras for parking space recognition, combined with electronic control units and sensors to set and maintain a constant steering angle and vehicle speed, utilizing a clothoid curve or arc for smooth and precise parking maneuvers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If automatic steering control is implemented to assist parking maneuvers, then ease of operation is improved, but manufacturing precision deteriorates due to difficulty in maintaining consistent steering angle control

Engineering Contradiction:

Improveease of operationVSAvoidparking position accuracy

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The system continuously detects the host vehicle's position relative to the parking space using sensors and cameras, compares it with the target position, and automatically adjusts steering angle and vehicle speed in real-time to correct deviations and achieve precise parking

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual mechanical steering control with an automated control system that uses sensors, processors, and actuators to precisely control steering angle and vehicle speed, eliminating human error and inconsistency

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If conventional steering control methods are used, then device complexity is reduced, but manufacturing precision deteriorates due to inability to maintain consistent steering angle and speed

Engineering Contradiction:

Improveparking position accuracyVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The control device integrates multiple functions including parking space recognition, vehicle position detection, steering angle control, and vehicle speed control into a single unified system, managing complexity through functional integration rather than separate components

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system introduces a control device as an intermediary between the driver's parking intent and the vehicle's actual movement, using sensors and processors to mediate the control of steering and speed for precise parking execution

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9517766B2Parking assistance device and parking assistance device control method

Publication Date: 2016.12.13 ASTEMO LTD

AI summary

A parking assist device includes a target steering angle setting section configured to set a target value of the steering angle; a target vehicle speed setting section configured to set a target value of the vehicle speed; an automatic steering control device configured to automatically steer the steering wheel so that the sensed steering angle becomes the target steering angle; an automatic vehicle speed control device configured to automatically control the vehicle speed so that the sensed vehicle speed becomes the target vehicle speed; and a parking space recognizing section configured to recognize a parking space of the host vehicle, the host vehicle being parked within the recognized parking space by the automatic steering control device and the automatic vehicle speed device.