Probe Data Evaluation Apparatus for Map Accuracy

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Solution Overview

Problem

The reliability of probe data used for generating map data is compromised due to varying vehicle conditions and road segments, making it difficult to collect accurate data for map generation.

Innovation Solution

A probe data evaluation apparatus that collects probe data from vehicles, generates provisional map data, compares it with reference map data, and determines adoption based on comparison results to ensure high reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If probe data is collected from multiple vehicles under varying conditions, then the quantity of data increases, but the reliability of the data decreases

Engineering Contradiction:

Improvequantity of probe dataVSAvoidreliability of probe data

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent divides the evaluation process into segments: generating provisional map data from probe data, comparing specific comparison segments between provisional and reference map data, and evaluating reliability based on deviation amounts in each segment. This segmentation allows systematic handling of large data volumes while maintaining reliability assessment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements feedback by comparing generated provisional map data against reference map data, calculating deviation amounts, and using this comparison result to determine whether to adopt the probe data. This closed-loop feedback mechanism ensures data reliability is verified before adoption.

Inventive Principle:

Principle #23Feedback

2Productivity

If probe data is collected without verification, then the productivity of map generation increases, but the accuracy of map data decreases

Engineering Contradiction:

Improveproductivity of map generationVSAvoidaccuracy of map data

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent performs preliminary actions by generating provisional map data and conducting comparison evaluations with reference map data before final adoption decisions. This preliminary verification ensures accuracy is confirmed before the probe data is permanently integrated into map data, maintaining high standards while enabling efficient processing.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If all probe data is adopted without evaluation, then the ease of operation increases, but the reliability of map data decreases

Engineering Contradiction:

Improveease of data adoptionVSAvoidreliability of map data

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The probe data evaluation apparatus performs self-service by automatically evaluating its own collected probe data through systematic comparison with reference map data. The system independently determines reliability and makes adoption decisions without manual intervention, maintaining reliability through automated verification while preserving ease of operation.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12025464B2Probe data evaluation apparatus, and storage medium storing probe data evaluation program product

Publication Date: 2024.07.02 DENSO CORP

AI summary

In a probe data evaluation apparatus, probe data are collected from a vehicle. Provisional map data are generated based on the collected probe data. The generated provisional map data are compared with reference map data, to provide a comparison result. Whether or not to adopt the collected probe data is determined based on the comparison result.