Parking Trajectory Adjustment for Asymmetric Boundary Offsets

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Solution Overview

Problem

Existing parking assistance systems often result in vehicles being parked too far rearward in perpendicular spaces, potentially overhanging curbs or aborting prematurely due to misjudging non-vehicle boundary objects, especially when the offset between boundary objects is significant.

Innovation Solution

A parking assistance system that determines a parking trajectory by calculating an offset between boundary objects using ultrasonic sensors, adjusting the vehicle's orientation in the parked end position based on this offset, either towards the object extending further into the roadway or an intermediate value between the two, to prevent overhang and ensure a plausible parking position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the parking assistance system orients the vehicle toward the object extending less far in the direction of the roadway to maneuver the vehicle as far as possible into the parking space, then the vehicle can be parked deeper in the parking space, but the vehicle may end up located far to the rear in the parking space, potentially overhanging the curb or aborting prematurely

Engineering Contradiction:

Improveparking depthVSAvoidparking position accuracy

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The system performs preliminary measurement of the offset between boundary objects before determining the parking trajectory. This advance knowledge allows the system to calculate and adjust the target parked end position accordingly, preventing the vehicle from being positioned too far rearward in the parking space.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the parameter of the parked end position based on the measured offset between boundary objects. When a significant offset is detected, the system adjusts the target position forward along the parking trajectory to compensate, ensuring the vehicle ends up in a plausible position that does not overhang the curb.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the parking assistance system uses ultrasonic sensors to measure boundary objects, then the system can detect objects accurately, but the system may misjudge non-vehicle boundary objects such as pillars, bollards, or planter boxes

Engineering Contradiction:

Improveobject detection accuracyVSAvoidobject type recognition

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The system segments the measurement process into two independent parts: measuring the offset between boundary objects and determining the parking trajectory. By separating these functions, the system can accurately measure positional relationships without needing to identify or classify the specific type of boundary objects, thus avoiding misjudgment of non-vehicle objects.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system extracts only the necessary measurement information (offset between objects) from the ultrasonic sensor data, discarding the need to identify or classify object types. This extraction approach allows accurate measurement while avoiding the complexity and errors associated with object recognition.

Inventive Principle:

Principle #2Taking out (Extraction)

3Device complexity

If the parking assistance system determines the parking trajectory without considering the offset between boundary objects, then the system operation is simpler, but the vehicle may be parked in an implausible position that does not account for the asymmetric boundaries

Engineering Contradiction:

Improvesystem operation complexityVSAvoidparking position precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The system performs a preliminary measurement of the offset between boundary objects before trajectory determination. This single additional measurement step provides the necessary information to adjust the parked end position, achieving improved precision without significantly increasing overall system complexity.

Inventive Principle:

Principle #10Preliminary action

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

Prevents vehicles from being parked too far rearward, avoiding curb overhangs and ensuring a more plausible end position by accurately determining the parking trajectory based on object offsets, thereby enhancing parking precision and safety.

Implementation Method 1

measure a parking space and its surroundings by use of an ultrasonic sensor system

Methodology Applied

Scientific EffectUltrasonic measurement: Ultrasound

Data Source

PatentUS9783231B2Orientation of the extent of a vehicle in the direction of the roadway in a parked end position with a parking assistance system for transverse parking

Publication Date: 2017.10.10 BAYERISCHE MOTOREN WERKE AG

AI summary

A parking assistance system is provided for carrying out an automated parking maneuver of a motor vehicle into a perpendicular parking space transversely with respect to the roadway along a parking trajectory to a parked end position. The parking assistance system is configured to determine an offset between the extent of one object in the direction of the roadway on one side of the parking space and the extent of another object in the direction of the roadway on the other side of the space by way of a sensor system. The parking assistance system is configured to determine a parking trajectory with a parked end position based on the offset.