Reverse Driving Controller for Road-Adaptive Return Trajectory

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Solution Overview

Problem

Existing automatic reverse driving systems struggle to cope with changes in road surface conditions and unstable traveling during forward driving, making it difficult to perform appropriate reverse traveling, especially on bad roads.

Innovation Solution

An automatic reverse driving controller that includes a control unit with a traveling information input unit, storage unit, instruction input unit, and processing unit. This controller inputs and stores information about the vehicle's traveling trajectory and road surface conditions, and upon receiving a switching instruction, it corrects the outward route trajectory based on the road surface conditions to determine a suitable return route, thereby controlling the vehicle's reverse traveling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the vehicle travels forward on a bad road, then the vehicle can reach the destination, but the road surface condition changes and causes unstable traveling

Engineering Contradiction:

Improvereverse traveling stabilityVSAvoidroad surface condition change

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system performs preliminary actions by storing the traveling trajectory and road surface conditions during forward travel before reverse travel is needed. This advance data collection enables the control unit to predict and adapt to road surface changes during reverse travel, improving reliability on bad roads

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback by using the stored road surface condition information to continuously adjust the reverse traveling trajectory. The control unit compares the original trajectory with actual road conditions and makes real-time corrections, ensuring stable reverse travel despite changing road surfaces

Inventive Principle:

Principle #23Feedback

2Reliability

If the vehicle reverses on a narrow road, then the vehicle can return, but it may contact with oncoming vehicles or obstacles

Engineering Contradiction:

Improvereverse traveling safetyVSAvoidobstacle contact risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system stores the outward traveling trajectory and surrounding environment information before reverse travel. This preliminary data capture allows the control unit to plan a safe return route that avoids known obstacles and oncoming vehicle paths, improving reverse traveling safety on narrow roads

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The control unit uses feedback from stored trajectory data and real-time sensor information to adjust the reverse traveling path. By continuously monitoring the environment and comparing it with the planned trajectory, the system can avoid obstacles and prevent contact with oncoming vehicles

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the system stores detailed traveling information, then the reverse trajectory can be corrected accurately, but the information storage requirement increases

Engineering Contradiction:

Improvetrajectory correction accuracyVSAvoidinformation storage volume

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system extracts only the essential traveling information needed for reverse trajectory correction, such as key trajectory points and critical road surface conditions, rather than storing all possible data. This selective extraction maintains correction accuracy while minimizing storage requirements

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system stores trajectory information at selected intervals and for selected parameters rather than continuously and completely. This partial action approach provides sufficient data for accurate trajectory correction without the excessive storage burden of complete continuous recording

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12202484B2Automatic reverse driving controller

Publication Date: 2025.01.21 SUBARU CORP

AI summary

An automatic reverse driving controller includes a control unit. The control unit includes a traveling information input unit, a traveling information storage unit, an automatic reverse traveling instruction input unit, and a processing unit. The traveling information input unit inputs information on a traveling trajectory of the vehicle and a road surface condition. The traveling information storage unit stores the inputted information on the traveling trajectory and the road surface condition. The automatic reverse traveling instruction input unit receives an input of an instruction to switch from traveling by a driving operation of a driver of the vehicle to automatic reverse traveling by the control unit. The processing unit corrects, in response to the input of the instruction, a traveling trajectory of an outward route on the basis of the road surface condition to determine a traveling route for a return route, and control reverse traveling of the vehicle.