Driving Assistance Apparatus Dynamic Route Length Adjustment
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Solution Overview
Problem
Existing driving assistance systems provide unnecessary warnings when the expected route length is set too long, particularly during low-speed vehicle operations such as decelerating at traffic signals or stopping at stop signs, leading to driver frustration.
Innovation Solution
A driving assistance apparatus that dynamically adjusts the expected route length based on the vehicle's traveling state, using sensors to determine if the vehicle is transitioning to a low-speed state, starting, advancing, or decelerating, and adjusts the warning zone length accordingly to minimize unnecessary warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the expected route length is set to an appropriate length for general speed travel, then the warning system can detect targets that may cross the route within the time threshold, but the expected route length becomes excessively large when the vehicle decelerates or stops, causing unnecessary warnings
Solution Approach 1:
The patent applies dynamics by making the expected route length variable rather than fixed. The control device dynamically adjusts the expected route length based on the vehicle's current speed and traveling state. When the vehicle is moving at higher speeds, a longer expected route length is used to detect potential crossing targets. When the vehicle decelerates or stops, the expected route length is reduced or deactivated, preventing unnecessary warnings during low-speed operations such as stopping at traffic signals or stop signs.
2Measurement precision
If the expected route length is extended to ensure detection of all potential crossing targets, then detection coverage is improved, but false warnings increase during low-speed operations
Solution Approach 1:
The patent applies parameter changes by modifying the expected route length parameter according to the vehicle's traveling state. The control device monitors vehicle speed and determines whether the vehicle is in a moving state or a stopped state. Based on this determination, the expected route length parameter is adjusted: a longer length is used when the vehicle is moving to ensure comprehensive target detection, while a shorter or zero length is used when the vehicle is stopped to eliminate false warnings during low-speed operations.
Data Source
AI summary
A driving assistance apparatus includes a host vehicle information acquisition device configured to acquire host vehicle information including a vehicle speed of a host vehicle and a signal indicating that braking force is applied to the host vehicle by a braking device of the host vehicle, a target information acquisition device configured to acquire target information including a relative position of a target present on the periphery of the host vehicle for the host vehicle, an advancing direction of the target, and a speed of the target, and an electronic control device.