Electric Vehicle Collision Control Device with Adaptive Risk Levels
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Solution Overview
Problem
Electric vehicles like power scooters face discomfort issues for drivers due to frequent collision prevention controls triggered by obstacles, leading to unnecessary deceleration and alarm outputs, especially when obstacles approach from the side or rear.
Innovation Solution
A control device with an obstacle detection unit, risk level determination unit, and control level adjustment unit that adjusts collision prevention controls based on detected obstacles' distance and risk levels, allowing drivers to temporarily release controls and display obstacle presence, reducing unnecessary interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision preventing control is strictly performed to prevent collision with obstacles, then safety is improved, but driver comfort deteriorates due to frequent alarm output and deceleration
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the control level based on the type of obstacle detected. When a pedestrian is detected, the system performs strict collision preventing control with alarm output and deceleration. When another vehicle is detected, the system lowers the control level to perform only deceleration control without alarm output. This parameter-based differentiation resolves the contradiction by adapting the intensity of safety measures to the specific risk level of each obstacle type.
Solution Approach 2:
The patent implements dynamics by making the collision preventing control adaptive rather than static. The control level is dynamically adjusted based on real-time obstacle detection results. The system transitions between different control modes (strict control for pedestrians, relaxed control for vehicles) depending on the situation, allowing the safety system to be both effective and comfortable without requiring manual driver intervention.
2Reliability
If deceleration control and alarm output are performed frequently to avoid obstacles, then collision risk is reduced, but vehicle mobility and driver usability deteriorate
Solution Approach 1:
The patent changes the control parameters based on obstacle type to optimize both safety and mobility. For pedestrian obstacles, the system maintains high safety parameters with alarm output and deceleration. For vehicle obstacles, the system reduces control intensity by performing only deceleration without alarm, thereby maintaining mobility while still preventing collisions. This selective parameter adjustment resolves the contradiction between safety and productivity.
3Reliability
If strict driving assistance is applied to detect all obstacles, then safety is improved, but driver comfort deteriorates due to unnecessary control interventions
Solution Approach 1:
The patent applies local quality by differentiating the control response based on the specific type of obstacle detected. Instead of applying uniform strict control to all obstacles, the system applies localized quality of control: strict alarm and deceleration for pedestrians, and relaxed deceleration-only control for vehicles. This localized differentiation ensures safety for high-risk obstacles while avoiding unnecessary interventions for lower-risk obstacles, thereby maintaining driver comfort.
Solution Approach 2:
The system changes control parameters according to obstacle classification. When the obstacle detection unit identifies a pedestrian, the control level is set to high with alarm output enabled. When a vehicle is identified, the control level is lowered with alarm output disabled. This parameter-based local adaptation resolves the contradiction by providing strict assistance only where necessary.
Data Source
AI summary
There is provided a control device configured to perform a collision preventing control based on an output of an obstacle detection unit. A risk level determination unit determines a collision risk level based on a distance between the obstacle and the electric vehicle. A control level adjustment unit adjusts a control level of the collision preventing control based on the collision risk level. The control level adjustment unit lowers the control level when a releasing unit configured to temporarily release the collision preventing control is operated by a driver during the collision preventing control and causes the electric vehicle to display presence of the obstacle.