Vehicle Acceleration Suppression Based on Parking Frame Certainty
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Solution Overview
Problem
Existing vehicle acceleration suppression technologies, such as those described in PTL 1, often deteriorate operability when entering a parking lot, as they control the throttle in a deceleration direction regardless of the accelerator operation, leading to reduced parking efficiency and increased risk of acceleration errors.
Innovation Solution
A vehicle acceleration suppression device and method that adjust the suppression degree based on the parking frame entering certainty degree, allowing for reduced acceleration suppression in low certainty conditions to maintain operability and increased suppression in high certainty conditions to enhance safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If throttle control is performed in deceleration direction regardless of accelerator operation when vehicle speed is high, then acceleration suppression effect is improved, but operability in parking lot deteriorates
Solution Approach 1:
The patent applies dynamics by making the acceleration suppression control adjustable rather than fixed. The control unit dynamically adjusts the degree of acceleration suppression based on the parking frame entering certainty degree calculated from image recognition results. When the vehicle is determined to be entering a parking frame with high certainty, the suppression control is reduced or canceled, improving operability. When certainty is low or the vehicle is on a road, normal suppression control is applied to maintain safety.
Solution Approach 2:
The patent changes the parameter of acceleration suppression degree based on the calculated parking frame entering certainty degree. The control unit modifies the throttle control characteristics dynamically - reducing or canceling suppression when high certainty of parking frame entry is detected, and maintaining normal suppression when certainty is low. This parameter adjustment resolves the contradiction between safety suppression and parking operability.
2Reliability
If acceleration suppression control is applied continuously, then safety against operational error is improved, but parking efficiency deteriorates
Solution Approach 1:
The patent extracts the acceleration suppression control from continuous operation and applies it selectively. By calculating the parking frame entering certainty degree using image recognition of parking frame lines, the system determines when to apply suppression control and when to release it. This extraction of suppression control from continuous operation to conditional application improves parking efficiency while maintaining safety when needed.
Solution Approach 2:
The patent implements feedback by continuously calculating the parking frame entering certainty degree based on image recognition results and using this feedback to adjust the acceleration suppression control in real-time. The control unit receives feedback from the certainty degree calculation and dynamically adjusts the throttle control, creating a closed-loop system that balances safety and efficiency based on actual parking context.
3Reliability
If throttle control is restricted based on vehicle speed, then acceleration suppression is improved, but operability until vehicle reaches parking space deteriorates
Solution Approach 1:
The patent makes the throttle control dynamic by adjusting the acceleration suppression degree based on the parking frame entering certainty degree rather than solely on vehicle speed. When the vehicle is approaching a parking frame with high certainty, the suppression is reduced or canceled, allowing normal accelerator response for reaching the parking space. When certainty is low or the vehicle is on a road, speed-based suppression remains active.
Data Source
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AI summary
A total certainty factor indicating a total degree of certainty of the parking frame certainty degree and the parking frame entering certainty degree is calculated based on a parking frame certainty degree indicating the degree of certainty that a parking frame is present in a travel direction of a vehicle, and a parking frame entering certainty degree indicating the degree of certainty that the vehicle enters the parking frame. When the total certainty factor is low, acceleration of the vehicle controlled according to an operation amount of an accelerator pedal for instructing a driving force by operation of a driver is suppressed with a low suppression degree, as compared with a case where the total certainty factor is high. Further, the acceleration of the vehicle is suppressed at a low suppression degree according to the travel direction of the vehicle.