Vehicle Collision Notification Stability via Sensor Prioritization
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Solution Overview
Problem
Conventional driving support apparatuses for vehicles struggle to provide stable collision likelihood notifications at bad-visibility intersections due to inaccuracies in communicated vehicle information from GPS signals, leading to frequent switching of notification contents that can confuse drivers.
Innovation Solution
A driving support apparatus that combines autonomous sensor information from millimeter-wave radar and stereo cameras with inter-vehicle communication data to determine collision likelihood, prioritizing notifications based on more accurate autonomous sensor data to prevent confusion and stabilize displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If collision likelihood notifications are provided based on both autonomous sensor information and communicated vehicle information, then the coverage of collision detection is improved, but the notification stability deteriorates due to frequent switching between different information sources
Solution Approach 1:
The patent introduces a notification determination unit as an intermediary that mediates between the autonomous sensor-based notification and the communicated information-based notification. This unit receives notification requests from both sources and determines which notification to actually output, preventing direct conflict and unstable switching. The intermediary coordinates the two notification streams to ensure stable output while maintaining comprehensive detection coverage.
Solution Approach 2:
The notification determination unit performs preliminary evaluation of notification requests before they are output. It assesses the reliability and timing of both autonomous sensor notifications and communicated information notifications in advance, determining which should be prioritized or suppressed. This preliminary action prevents unstable switching by pre-determining the appropriate notification source based on current conditions.
2Area of stationary object
If communicated another vehicle information is used for collision estimation, then the detection range is extended to bad-visibility intersections, but the measurement precision deteriorates due to GPS signal inaccuracies
Solution Approach 1:
The notification determination unit acts as an intermediary that evaluates the reliability of communicated another vehicle information before using it for collision notifications. It compares the precision requirements with the actual accuracy of GPS-based data, and only utilizes communicated information when appropriate, thereby extending detection range while maintaining notification reliability.
Solution Approach 2:
The system applies different quality standards to different information sources based on their characteristics. Autonomous sensor information is used when high precision is required, while communicated information is used to extend coverage in situations where lower precision is acceptable. The notification determination unit dynamically selects the appropriate information quality level for each specific situation.
3Speed
If notification requests from both autonomous sensor and inter-vehicle communication are processed independently, then the responsiveness to collision risks is improved, but the notification stability deteriorates due to conflicting requests
Solution Approach 1:
The notification determination unit serves as a mediator that receives independent notification requests from both autonomous sensor processing and inter-vehicle communication processing. Instead of allowing these requests to conflict, the mediator coordinates them by evaluating timing, reliability, and current vehicle state, ensuring that only appropriate notifications are outputted. This maintains responsiveness while ensuring stability.
Solution Approach 2:
The notification determination unit implements feedback mechanisms to monitor the state of notification requests from both sources. When it detects conflicting or redundant requests, it adjusts the notification output based on this feedback, preventing unstable switching. The feedback loop ensures that the system responds quickly to real risks while filtering out redundant or conflicting notifications.
Data Source
AI summary
A driving support apparatus for a vehicle comprises a first determination part which determines whether a likelihood of a collision between an own vehicle and another vehicle exists based on information acquired by an autonomous sensor and outputs a first notification request when a notification for the likelihood of the collision is required, a second determination part which determinates whether the likelihood of the collision based on information acquired by an inter-vehicle communication device and GPS sensor and outputs a second notification request when the notification for the likelihood of the collision is required, a warning determination part which inhibits the output of the second notification request by the second determination part when a time at which starts outputting the second notification request for a notification device by the second determination part has come until the time period from a time treq1 at which starts outputting the first notification request for the notification by the first determination part. Consequently, the apparatus is less likely to bother and/or confuse a driver, since the notification contents are not switched in a short time.