Driving Support Apparatus Reliability-Based Mode Switching
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Solution Overview
Problem
Conventional driving support systems abruptly switch to manual mode when the reliability of detection apparatuses decreases, leading to a rapid increase in driver load due to the reliance on the sum of all detection apparatuses' reliabilities, causing automatic driving to stop.
Innovation Solution
A driving support apparatus with a reliability acquiring unit, determination unit, correspondence acquiring unit, setting unit, and executing unit that determines the types of driving support based on combinations of high reliability detection apparatuses, allowing for continued automatic driving support even when one detection apparatus fails by adjusting the driving support accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sum of reliabilities of all detection apparatus is used to determine whether automatic driving continues, then the overall system reliability is improved, but when one detection apparatus malfunctions, the driver load rapidly increases due to sudden mode switching
Solution Approach 1:
The patent segments the determination of driving support continuation into two independent aspects: (1) overall system reliability based on sum of all detection apparatus reliabilities, and (2) individual apparatus reliability evaluation. This segmentation allows the system to maintain automatic driving by evaluating remaining functional apparatuses independently when one apparatus malfunctions, preventing sudden mode switching and reducing driver load while preserving overall reliability assessment
Solution Approach 2:
The patent applies local quality by evaluating reliability at different levels: global reliability (sum of all apparatuses) and local reliability (individual apparatus or subset combinations). When a local failure occurs in one detection apparatus, the system can identify the specific failed component and adjust the driving support determination based on remaining functional local units, rather than treating the entire system as failed, thus maintaining ease of operation while preserving overall reliability
2Reliability
If automatic driving stops when reliability decreases, then safety is improved, but the driver load rapidly increases due to sudden mode change
Solution Approach 1:
The patent implements dynamic adjustment of driving support determination based on real-time reliability evaluation. Instead of a static threshold that causes abrupt mode switching, the system dynamically evaluates whether the sum of reliabilities of functional detection apparatus meets the required threshold, allowing continuous adaptation to changing system conditions. This dynamic approach enables smooth transitions and maintains ease of operation while preserving safety through continuous reliability monitoring
3Measurement precision
If all detection apparatus are required for automatic driving, then measurement precision is improved, but the system becomes vulnerable to single point failures
Solution Approach 1:
The patent applies partial action by determining that automatic driving can continue with a subset of detection apparatus rather than requiring all apparatus to function. The system evaluates whether the sum of reliabilities of functional apparatus is sufficient to maintain safe operation, allowing the system to operate with partial functionality when some apparatus fail, thus improving robustness while maintaining adequate measurement precision through the remaining functional sensors
Data Source
AI summary
A driving support apparatus performing a plurality of driving support includes: a reliability acquiring unit that acquires each reliability of a plurality of detection apparatus, the reliability representing likelihood of a detection result of the detection apparatus; a determination unit that determines whether or not each of the detection apparatus is a high reliability apparatus determined based on a reliability threshold; a correspondence acquiring unit that acquires correspondence information representing a correspondence between combinations of the plurality of detection apparatus including information of whether or not each apparatus is a high reliability apparatus, and types of driving support to be performed; a setting unit that sets a driving support to be performed, based on a result of the determination; an executing unit that executes the driving support to be performed; and an output unit that outputs a command to allow the executing unit to execute the driving support.