Parking Assist Obstacle Detection and Deceleration Control
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Solution Overview
Problem
Existing parking assist systems face challenges in balancing driver convenience and vehicle safety during automatic parking, as they either prolong the process or compromise safety when obstacles are detected, such as pedestrians or animals, without adequate measures to adjust the vehicle's movement accordingly.
Innovation Solution
A parking assist system that uses a control device to autonomously control the vehicle's movement by recognizing obstacles in specific areas, stopping or decelerating when necessary, and allowing resumption based on sensor feedback and driver inputs, thereby optimizing the parking process without increasing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle stops whenever a moving obstacle is detected during automatic parking, then safety around the vehicle is improved, but the automatic parking process time increases and driver convenience deteriorates
Solution Approach 1:
The patent applies local quality by dividing the detection space into two distinct zones: a first area where obstacles require complete stopping, and a second area where only deceleration is needed. This spatial differentiation allows the system to apply appropriate safety measures locally rather than uniformly, resolving the contradiction by stopping only when necessary (in the first area) while allowing continued movement at reduced speed (in the second area), thus maintaining safety without unnecessarily prolonging the parking process.
2Reliability
If the vehicle always stops when a moving obstacle is present, then safety is improved, but driver convenience deteriorates due to required manual intervention
Solution Approach 1:
The system differentiates between two spatial zones to apply different safety responses. When obstacles are detected in the second area (less critical zone), the vehicle merely decelerates and continues automatic parking without requiring driver intervention. Only when obstacles enter the first area (critical zone) does the system require complete stopping and manual intervention. This localized approach to safety responses maintains driver convenience while ensuring safety when truly necessary.
Solution Approach 2:
The patent implements dynamic response based on obstacle location. The system transitions between different operational states: normal automatic parking, decelerated automatic parking (when obstacles are in the second area), and stopped state requiring manual intervention (when obstacles are in the first area). This dynamic adaptation allows the system to maintain convenience for non-critical situations while ensuring safety for critical situations, resolving the contradiction between safety and ease of operation.
3Ease of operation
If no measure is taken when a moving obstacle is present, then driver convenience is maintained, but safety around the vehicle deteriorates
Solution Approach 1:
The patent resolves this contradiction by implementing localized safety measures in the second area. When obstacles are detected in the second area (adjacent to but outside the critical first area), the system applies deceleration as a safety measure while maintaining automatic parking operation. This provides a intermediate safety response that protects against potential hazards without completely stopping, thus maintaining driver convenience while improving safety compared to taking no action at all.
Data Source
AI summary
A parking assist system includes: a control device configured to control a vehicle so as to move the vehicle autonomously from a current position to a target position; and an external environment sensor configured to detect an obstacle. During control of the vehicle to the target position, the control device is configured to recognize the obstacle present in a first area and a second area based on information from the external environment sensor. In a case where the control device recognizes the obstacle in the first area, the control device stops the vehicle, and in a case where the control device recognizes the obstacle in the second area and the obstacle in the second area is a moving object and/or a moving creature, the control device moves the vehicle in a decelerated state in which the vehicle is decelerated to a prescribed speed.