Road Configuration Estimation Using Dynamic Object Tracking

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Solution Overview

Problem

Existing road configuration estimation systems face challenges in accurately distinguishing between stationary and moving objects, leading to erroneous detection and determination, which affects the reliability of approximating road configurations, especially in environments with noise and multipath influences.

Innovation Solution

A road configuration estimation apparatus comprising a relative position acquisition unit, a stationary object determination unit, and an object correlation unit, which computes an approximate curve for road configuration based on the distinction between stationary and moving objects, using a tracking filter to extract proper stationary objects and update approximate curve coefficients.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a peripheral object observation device is used to observe objects near a moving object, then the road configuration can be estimated, but erroneous detection occurs due to noise and multipath influences causing stationary and moving objects to be confused

Engineering Contradiction:
Improveobject detection accuracyVSAvoidroad configuration estimation reliability
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent applies dynamics by transitioning from static object classification to dynamic tracking. The object correlation unit continuously tracks objects across multiple observation time points, using motion patterns to distinguish stationary objects (road edges) from moving objects (vehicles). This dynamic approach resolves the contradiction by maintaining detection accuracy while improving estimation reliability through temporal analysis of object behavior.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements feedback through the object correlation unit, which uses past observation results to inform current object identification. By correlating objects across multiple time points and using tracking information to validate current detections, the system reduces erroneous detections from noise and multipath effects, thereby improving both detection accuracy and estimation reliability.

Inventive Principle:
Principle #23Feedback

2Measurement precision

If stationary objects are used to estimate road configuration, then the road edge position can be determined, but moving objects may be erroneously identified as stationary objects

Engineering Contradiction:
Improveroad edge position accuracyVSAvoidobject classification reliability
Core Design Contradiction:
Measurement precisionVSReliability

Solution Approach 1:

The patent applies preliminary action by performing object correlation and tracking before final road configuration estimation. The object correlation unit pre-processes observation data by identifying and tracking objects across multiple time points, establishing their motion patterns in advance. This preliminary classification ensures that only verified stationary objects are used for road edge determination, preventing moving objects from being erroneously identified and improving both position accuracy and classification reliability.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements continuity of useful action through continuous object tracking across multiple observation time points. Instead of isolated detections, the system maintains continuous tracking of objects, using this continuous information to reliably distinguish stationary from moving objects. This continuous observation and tracking ensures accurate road edge position determination while preventing misclassification of moving objects.

Inventive Principle:
Principle #20Continuity of useful action

3Measurement precision

If multiple observation results are used to compute approximate curve, then the road configuration estimation is more accurate, but the influence of erroneous detection increases

Engineering Contradiction:
Improveroad configuration estimation accuracyVSAvoiderroneous detection influence
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent applies the taking out principle by extracting and removing erroneous detection results from the set of all observation results. The object correlation unit identifies and excludes detections that do not correspond to actual objects or are caused by noise and multipath effects. By extracting only valid stationary object positions from the multiple observations, the system maintains high estimation accuracy while eliminating the harmful influence of erroneous detections.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements parameter changes by transforming the raw observation data into correlated object trajectories. Instead of directly using multiple observation results, the system changes the parameter representation to include temporal correlation and motion patterns. This transformation allows the system to utilize multiple observations for accurate road configuration estimation while filtering out erroneous detections through parameter validation and consistency checks.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentEP2390745B8Road configuration estimation apparatus and road configuration estimation method
Publication Date: 2017.11.08 MITSUBISHI ELECTRIC CORP

AI summary

There is provided a road configuration estimation apparatus that precludes influences of erroneous detection of an object and erroneous still determination and estimates a road configuration. A radar (peripheral object observation device) 110 repeatedly observes a relative position of an object relative to the moving object, which is located in the vicinity of a moving object. A stationary object identification unit (stationary object determination unit) 130 determines whether or not the object the relative positions of which have been observed by the radar 110 is still. A road approximate curve temporary computation unit (object correlation unit) 140 determines a plurality of the relative positions of an identical object observed by the radar 110 from among the relative positions observed by the radar 110. A road approximate curve main computation unit (approximate curve computation unit) 160 computes an approximate curve that approximates the configuration of a road on which the moving object is located, based on a result of the determination by the stationary object identification unit 130 and a result of the determination by the road approximate curve computation unit 140.