Drive Assistance Device Parking Object Display Continuity
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Solution Overview
Problem
Existing drive assistance systems fail to continuously display detected objects near a vehicle after they are no longer within the detection range of object detectors, leading to potential blind spots during parking maneuvers.
Innovation Solution
The system determines transition conditions for display images based on the vehicle's running state when an object is detected and when it is no longer detected, ensuring that the displayed image continues to indicate the presence of objects near the vehicle, even if they are out of the detection range, by using a combination of camera and sonar data to create an overhead view image that includes the object's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the display image is switched back to the undetected state when the object detector no longer detects an object, then the display unit shows a simplified undetected state image, but the driver cannot visually know the presence of an object that still exists near the vehicle
Solution Approach 1:
The system performs preliminary action by determining transition conditions in advance before switching the display image. It evaluates both the detection state (whether an object is detected) and the running state (vehicle speed, gear position) to decide when to switch from the detected object image to the undetected state image, ensuring information is maintained until safely transitionable
Solution Approach 2:
The display transition condition is made dynamic by considering the running state of the host vehicle. The system adjusts the transition criteria based on vehicle speed and gear position, allowing the display to maintain object information longer when the vehicle is stationary or moving slowly, and transitioning more quickly when moving at higher speeds
2Reliability
If the system continues displaying the detected object image after the object is no longer in detection range, then the driver maintains awareness of the object's presence, but the system requires additional processing to determine when to transition the display state
Solution Approach 1:
The control unit performs preliminary evaluation by determining transition conditions that incorporate both detection state and running state parameters. This preliminary assessment establishes clear criteria for when to transition the display, simplifying the control logic while maintaining reliable driver awareness
Solution Approach 2:
The system uses feedback from the running state detection (vehicle speed, gear position) to dynamically adjust the display transition timing. The control unit continuously monitors these parameters and uses them to determine the appropriate moment to switch the display image, creating a closed-loop control system that balances awareness and complexity
Data Source
AI summary
The device comprises: a first image capture means (7) for image capturing a host vehicle vicinity; a sonar (12) which senses an object in the host vehicle vicinity; a second image capture means (14) for image capturing the left front corner of the host vehicle; an image compositing means for forming a bird's-eye image on the basis of the images which are captured with the first image capture means (7) and the second image capture means (14); and a control means (5) for controlling a switch of a display of a display means (13). The control means (5) establishes the display switch condition of the display means (13) on the basis of the travel state of the host vehicle when the sonar (12) senses the object and the travel state of the host vehicle when the sonar (12) does not sense the object.