Driving Support Device Using Acceleration Shape Analysis
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Solution Overview
Problem
Existing driving support devices face high computation loads and increased costs due to the extensive data processing required to assess and support driving characteristics and skills, necessitating a more efficient method for determining and responding to driver abilities.
Innovation Solution
A driving support device that repeatedly collects and stores pairs of longitudinal and lateral acceleration values, plots these on a two-dimensional coordinate plane to generate shapes, and sets parameters for support operations based on these shapes, allowing for efficient driving support by controlling in-vehicle equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wide-ranging data types are collected to determine driving characteristics, then assessment accuracy is improved, but computation load and processing time increase
Solution Approach 1:
The patent extracts only the essential data elements (longitudinal acceleration and lateral acceleration) from the wide-ranging data types mentioned in the background. By focusing on these two key parameters that directly reflect driving operations, the system achieves accurate driving characteristic assessment while avoiding the computational burden of processing numerous other potential data types.
Solution Approach 2:
The patent segments the complex driving behavior assessment into discrete, manageable units by plotting acceleration pairs on a two-dimensional coordinate plane and generating closed shapes. This segmentation transforms continuous complex data into discrete geometric representations that are easier to process and analyze, reducing overall computational complexity.
2Loss of information
If extensive data processing is performed to assess driving skills, then assessment comprehensiveness is improved, but processing time increases
Solution Approach 1:
The patent changes the parameter representation from raw time-series acceleration data to geometric parameters (area of closed shapes, shape characteristics) on a two-dimensional coordinate plane. This parameter transformation enables comprehensive driving skill assessment through simplified geometric calculations, significantly reducing processing time while maintaining assessment comprehensiveness.
Solution Approach 2:
The patent transitions from one-dimensional time-series data to two-dimensional spatial representation by plotting longitudinal and lateral acceleration pairs on a coordinate plane. This dimensional change allows the system to capture comprehensive driving characteristics in a compact visual format, enabling faster analysis without losing information.
3Productivity
If high computation performance is required for data processing, then processing speed is improved, but device cost increases
Solution Approach 1:
The patent employs simple geometric calculations (area computation of closed shapes formed by plotted points) that can be performed by basic processing units. This approach replaces the need for high-performance computational resources with simple, inexpensive processing operations that achieve the same productivity goal.
Solution Approach 2:
The patent substitutes complex computational algorithms with geometric visualization and calculation methods. By representing driving data as plots and closed shapes on a coordinate plane, the system replaces intensive numerical processing with simpler geometric operations, reducing the computational power requirements.
Data Source
AI summary
A driving support device includes a processing device that performs driving support by controlling in-vehicle equipment having an influence on running of a subject vehicle equipped with the driving support device. The processing device is configured to repeatedly obtain and store, at a predetermined time interval or a predetermined distance interval, a pair of values of longitudinal acceleration and lateral acceleration that are generated as a result of a driving operation performed by a driver, the longitudinal acceleration being an acceleration in a traveling direction of the subject vehicle, the lateral acceleration being an acceleration in a direction orthogonal to the traveling direction, and set at least one parameter of a support operation for performing the driving support, on the basis of a plurality of pairs each being the pair of the values of the longitudinal acceleration and the lateral acceleration repeatedly obtained and stored.