Vehicle Door Opening Control for Obstacle-Aware Safe Exit
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Solution Overview
Problem
There is a lack of technology to assist passengers in safely exiting a vehicle by controlling the door opening speed to prevent collisions with surrounding obstacles, which is not addressed by existing parking assist systems that use virtual lines.
Innovation Solution
A passenger safe exit assist device that includes a sensor device to detect obstacles and a controller to set virtual lines and control the door opening speed based on the distance and acceleration, allowing for adjustable door opening modes according to the driver's body type and selected mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the door is opened quickly to assist passenger exit, then the exit efficiency is improved, but the risk of collision with surrounding obstacles increases
Solution Approach 1:
The door opening system dynamically adjusts its operation mode between manual and automatic based on real-time obstacle detection. The controller monitors obstacle presence and automatically switches between fast opening (no obstacle) and controlled opening (obstacle present), making the system adaptable to varying conditions rather than fixed in one mode.
Solution Approach 2:
The system continuously receives feedback from sensor devices about obstacle presence and door opening state. Based on this feedback, the controller real-time adjusts the door opening speed and mode, switching between manual and automatic control to prevent collision while maintaining efficiency when safe.
2Reliability
If the door opening speed is controlled to prevent collision, then the safety is improved, but the exit efficiency deteriorates
Solution Approach 1:
The door opening speed is dynamically adjusted based on obstacle detection results. When no obstacle is detected, the door opens at full speed for efficiency. When obstacles are detected, the speed is controlled to prevent collision. This dynamic adjustment eliminates the need to choose between safety and efficiency.
Solution Approach 2:
The system changes the door opening speed parameter based on environmental conditions. The controller adjusts the speed parameter from high (efficient exit) to low (safe operation) depending on obstacle presence, allowing the system to optimize both safety and efficiency under different conditions.
3Ease of operation
If the door is automatically opened to assist passenger exit, then the ease of operation is improved, but the control precision deteriorates
Solution Approach 1:
The automatic door opening system uses feedback from sensors to monitor obstacle presence and door position. The controller continuously adjusts the opening process based on this feedback, ensuring precise control throughout the motion to prevent collision while maintaining automatic operation benefits.
Solution Approach 2:
Before the door completes its opening motion, the system performs preliminary checks for obstacles and prepares to apply counter-torque if needed. This preliminary anti-action prevents potential collision by having the control mechanism ready to intervene before damage can occur.
4Strength
If the door opening torque is increased to overcome resistance, then the door opening capability is improved, but the risk of door damage increases
Solution Approach 1:
The system applies preliminary counter-torque control to prevent the door from opening too quickly or forcefully. By applying opposing torque in advance when obstacles are detected, the system prevents excessive force that could damage the door or surrounding structures, while still allowing normal opening when safe.
Solution Approach 2:
The control system provides beforehand cushioning by limiting the maximum torque and speed of door opening. This prevents sudden forceful movement that could cause damage, while still providing sufficient opening capability for normal operation. The system cushions against potential damage before it can occur.
Data Source
AI summary
A passenger safe exit assist device and a method thereof obtain information of an obstacle around a vehicle and a speed at which the door of the vehicle is opened, set a virtual first line along the obstacle, and control the speed at which the door is opened, based on at least one of the first line or the speed. The device and method provide a customer with various safe exit modes such that the customer freely selects a mode and experiences alighting safely from the vehicle.