Vehicle Alarm System Using Segmented Road Boundary Detection
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Solution Overview
Problem
Conventional vehicle-mounted alarm systems fail to generate alarms at appropriate timings when using wide boundary markings, leading to potential driver distraction due to varying alarm generation times and repeated alarms with different danger levels.
Innovation Solution
A vehicle-mounted alarm system that extracts road boundary markings, sets multiple positions based on extraction results, and generates distinct alarms when the vehicle approaches or crosses these positions, with varying intensity depending on the distance and driver operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If alarm generation timing is set based on reaching a wide boundary marking, then the alarm is generated early, but the alarm may be generated too early when the vehicle has already crossed the marking
Solution Approach 1:
The wide boundary marking is segmented into multiple reference positions (first position at the near edge, second position at the far edge). The alarm system selectively uses different reference positions based on the vehicle's crossing state, allowing early alarm generation when approaching while avoiding premature alarms when already crossed.
Solution Approach 2:
The reference position for alarm generation is dynamically selected based on the vehicle's crossing state. When the vehicle has not crossed the wide boundary marking, the first position (near edge) is used for early warning. When the vehicle has crossed, the second position (far edge) is used to avoid false alarms, making the reference position adaptive to the current state.
2Reliability
If alarm generation timing is set based on running through a wide boundary marking, then the alarm is generated late, but the vehicle may have already run off the lane by then
Solution Approach 1:
The wide boundary marking is divided into multiple reference positions, with the first position (near edge) positioned to enable early alarm generation before the vehicle completes crossing, providing sufficient time for the driver to respond while maintaining alarm accuracy.
Solution Approach 2:
The alarm is generated in advance when the vehicle reaches the first position (near edge) of the wide boundary marking, before the vehicle actually crosses or runs off the lane. This preliminary alarm action provides timely warning while preventing the vehicle from leaving the lane.
3Reliability
If both reaching and running through times are used as alarm generation timings, then comprehensive coverage is achieved, but similar alarms occur twice causing driver attention to be lowered
Solution Approach 1:
Different alarm characteristics are assigned to different alarm generation scenarios. The first alarm (based on reaching the first position) and the second alarm (based on reaching the second position) have different configurations, allowing the system to provide comprehensive coverage while differentiating alarm types to maintain driver attention.
Solution Approach 2:
The alarm configuration is dynamically adjusted based on which reference position triggers the alarm. When the first position is used, one alarm configuration is applied; when the second position is used, a different alarm configuration is applied, making the alarm response adaptive to the specific situation and reducing driver desensitization.
Data Source
AI summary
The vehicle-mounted alarm generating apparatus includes an extracting section configured to extract a road boundary marking representing a boundary of a lane from an image of a picture of a road surface ahead of a vehicle, a position setting section configured to set a first position and a second position more distant from the vehicle than the first position in accordance with extraction results by the extracting section, a first alarm generating section configured to generate a first alarm when a distance between the vehicle and the first position becomes shorter than a predetermined first distance, and a second alarm generating section configured to generate a second alarm, when a distance between the vehicle and the first position becomes shorter than a predetermined second distance. The configuration of the second alarm is different from that of the first alarm.