Driver Characteristics Estimation Using Multi-Sensor Driving Data

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Solution Overview

Problem

Existing technologies struggle to accurately estimate individual characteristics of drivers, such as driving and cognitive traits, due to reliance on limited data sources like refueling timing and vehicle travel history.

Innovation Solution

A device and method that utilize machine learning to estimate individual characteristics by analyzing driving data including acceleration, steering, and peripheral camera information, allowing for highly accurate assessments without complex computations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If driving data including acceleration, steering, and camera information is collected and analyzed using machine learning, then measurement precision of individual characteristics is improved, but device complexity increases

Engineering Contradiction:
Improveaccuracy of individual characteristics estimationVSAvoidcomplexity of data processing system
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

A learned model serves as an intermediary between raw driving data and individual characteristics estimation. The model pre-processes and structures the complex multi-source data (acceleration, steering, camera images) into meaningful features, simplifying the estimation process while maintaining high accuracy. This intermediary layer handles the computational complexity internally, presenting a simplified interface for character estimation.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

Machine learning is performed in advance to train the learned model before actual use. The model learns optimal feature extraction and characterization patterns from training data, so that during actual operation, the system can quickly estimate individual characteristics without performing complex real-time learning. This preliminary training phase separates the complexity from the operational phase.

Inventive Principle:
Principle #10Preliminary action

2Measurement precision

If multiple driving evaluation items are used for estimation, then measurement precision is improved, but loss of time in data acquisition increases

Engineering Contradiction:
Improveaccuracy of driver characterizationVSAvoidtime for data collection and processing
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system continuously acquires driving data from multiple sensors (acceleration, steering, cameras) during normal driving operations without interrupting the driving process. Data collection occurs continuously in the background, and the learned model continuously processes this stream to update individual characteristics estimates. This continuous operation eliminates the need for separate data collection phases, making the time loss negligible.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

Complex mechanical or manual data collection processes are replaced with electronic sensors and automated data acquisition systems. The learned model automatically processes multiple data streams simultaneously, replacing what would otherwise require sequential manual analysis. This substitution enables parallel processing of multiple evaluation items, significantly reducing the time required.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4273013B1Individual characteristics management device, individual characteristics management method, non-transitory storage medium storing a program
Publication Date: 2025.03.05 TOYOTA JIDOSHA KK
  • EP4273013B1 patent drawingFigure 1
  • EP4273013B1 patent drawingFigure 2
  • EP4273013B1 patent drawingFigure 3

AI summary

An individual characteristics management device (10) includes: a data acquiring section (62) acquiring driving data relating to a plurality of driving evaluation items that are set in advance; and an individual characteristics estimating section (68) estimating individual characteristics of a driver based on the driving data acquired by the data acquiring section.