Vehicle Departure Speed Limiting for Undetected Obstacle Collisions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle collision damage reduction systems require additional sensors for obstacle detection during departure, which increase complexity and cost, and existing obstacle sensors are less accurate when the vehicle is stationary, leading to potential collision risks.
Innovation Solution
A collision damage reduction device and method that utilize existing vehicle sensors to determine upper limits for acceleration and velocity during departure, without additional sensors, to minimize damage even when obstacles are undetected, by controlling vehicle speed and acceleration based on sensor data from cameras and millimeter-wave radar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated sensor is added to detect obstacles under the vehicle bottom during departure, then collision detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent reuses existing sensors (camera, millimeter-wave radar, ultrasonic sensor) that serve multiple functions - both for normal obstacle detection during driving and for detecting obstacles under the vehicle bottom during departure. This eliminates the need for dedicated sensors while maintaining detection capability.
Solution Approach 2:
The existing sensor system serves itself by being repurposed for departure detection. The sensors already installed for normal driving operations are utilized to detect obstacles during departure without requiring additional dedicated detection equipment.
2Device complexity
If existing obstacle sensors are used during vehicle departure, then device complexity is reduced, but measurement precision deteriorates because sensors operate under assumption that vehicle is moving
Solution Approach 1:
The patent dynamically adjusts sensor operating assumptions based on vehicle state. When the vehicle is detected to be in a stopped state or departing, the control unit modifies the detection logic to account for stationary conditions, thereby maintaining sensor accuracy across different operational phases.
Solution Approach 2:
The control unit changes detection parameters based on vehicle state. When departure is detected, the system adjusts sensor sensitivity and evaluation criteria to accommodate the stationary or slow-moving condition, ensuring accurate obstacle detection despite the change in operational context.
3Productivity
If vehicle departs with high acceleration and velocity, then productivity is improved, but collision damage increases when obstacles are present
Solution Approach 1:
The system takes preliminary action by detecting obstacles before departure and preventing high acceleration when obstacles are present. The control unit evaluates sensor data prior to departure and restricts acceleration to minimal values when obstacles are detected, thereby preventing collision damage before it can occur.
Solution Approach 2:
The system uses real-time feedback from sensors to adjust acceleration and velocity during departure. The control unit continuously monitors obstacle detection status and dynamically modifies vehicle acceleration based on this feedback, reducing acceleration when obstacles are present and allowing normal acceleration when the path is clear.
Data Source
AI summary
A collision damage reduction device of the present disclosure includes: a departure judgment unit which detects that a vehicle is in a departing state; a departing-state acceleration velocity determination unit which determines upper limits for an acceleration and a velocity of the vehicle, when the vehicle is in the departing state; and a control unit which controls the acceleration and the velocity of the vehicle on the basis of upper limits determined by the departing-state acceleration velocity determination unit. Even in a situation in which an obstacle is not detected, the departing-state acceleration velocity determination unit determines, as first upper limits, such upper limits for the acceleration and the velocity that do not cause serious damage even if the vehicle contacts with assumed said obstacle.