Vehicle Guidance for Brake Failure Evacuation Routing
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Solution Overview
Problem
Existing vehicle guidance systems struggle to effectively guide a vehicle with an abnormality in the braking device to an appropriate emergency evacuation site.
Innovation Solution
A vehicle guidance device that utilizes satellite data, image information from a vehicle-mounted camera, and vehicle-related information from external sensors to determine an appropriate emergency evacuation site, enabling driving assistance control to navigate the vehicle without relying on onboard obstacle detection sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a navigation system is used to guide a vehicle with braking abnormality, then the vehicle can be guided to a repair factory, but the vehicle cannot be guided to an appropriate emergency evacuation site when traveling
Solution Approach 1:
The system dynamically switches guidance strategies based on braking device status. When braking abnormality is detected, the system transitions from standard navigation guidance to emergency evacuation guidance, selecting appropriate evacuation sites based on real-time vehicle position and road conditions. This dynamic adaptation ensures reliable guidance for both normal and abnormal operating conditions.
Solution Approach 2:
The system changes guidance parameters based on braking device status. When braking abnormality is detected, the guidance system changes from guiding to repair factories to guiding to emergency evacuation sites. The determination unit uses satellite data to identify suitable evacuation sites with appropriate friction coefficients and road conditions, adapting the guidance destination and route parameters according to the abnormality state.
2Device complexity
If driving assistance control is executed without obstacle detection sensors, then the vehicle can travel to emergency evacuation site using satellite data, but the system lacks onboard obstacle detection capability
Solution Approach 1:
The system uses satellite data as an intermediary to provide obstacle and road condition information without requiring onboard obstacle detection sensors. The determination unit processes satellite data to identify emergency evacuation sites and assess road conditions, using this external information source to compensate for the absence of onboard detection capabilities and enable safe travel to evacuation sites.
3Ease of operation
If emergency evacuation site is determined without considering road friction conditions, then the site selection is simpler, but the vehicle may not be able to travel safely without braking device
Solution Approach 1:
The determination unit evaluates multiple parameters including satellite data and friction coefficients when selecting emergency evacuation sites. The system changes site selection criteria to prioritize locations with appropriate friction conditions that enable safe vehicle stopping without functional braking devices. This parameter-based evaluation ensures both systematic site selection and travel safety.
Solution Approach 2:
The system replaces mechanical braking-dependent stopping methods with friction-based passive stopping. By selecting evacuation sites with high friction coefficient surfaces (such as gravel or sandy areas), the system substitutes the mechanical braking function with environmental friction characteristics, enabling safe vehicle cessation without functional braking devices.
Data Source
AI summary
A braking function recognition unit that recognizes a state of a braking device capable of applying a braking force to a vehicle, a first reception unit that receives satellite data from the artificial satellite, a determination unit that determines an emergency evacuation location based on the satellite data, and a driving assistance control unit that causes a vehicle traveling toward the emergency evacuation location to execute driving assistance control when the braking function recognition unit recognizes that there is an abnormality in the braking device.