Vehicle Door Detection Using Overlapping Sonar Zones
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Solution Overview
Problem
The existing vehicle door opening and closing device requires users to make specific movements within a limited operation zone, which can be inconvenient, especially in challenging conditions, and may lead to false detections when multiple objects are present.
Innovation Solution
A vehicle door opening and closing device with three or more detection sections arranged across the door's width, forming multiple overlapping operation zones, where the control system prioritizes the first detected object and allows movement in any zone, using existing back sonar sensors to enhance user convenience and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single operation zone is used for door opening/closing detection, then the detection system is simple, but user convenience deteriorates because users must make movements in a limited zone which may be difficult in certain conditions
Solution Approach 1:
The detection system is segmented into three or more detection sections arranged at intervals in the width direction of the door. Each detection section has its own detection range, and operation zones are formed by partial overlapping of adjacent detection ranges. This segmentation allows users to operate the door from multiple positions, improving ease of operation while maintaining a relatively simple detection system structure.
2Ease of operation
If multiple detection sections are used to expand operation zones, then user convenience improves, but false detection risk increases when multiple objects are present
Solution Approach 1:
The control section determines which detection section detected the object first before prioritizing that detection section's results. This preliminary action of identifying the first detector prevents false detections by establishing a clear priority rule: when multiple objects are present, only the object first detected in a specific operation zone triggers door operation, eliminating conflicts from multiple simultaneous detections.
Solution Approach 2:
Different detection sections have different priorities based on their local characteristics and detection timing. The control section prioritizes detection results from the detection section that first detected the object in a specific operation zone, giving local quality (priority status) to specific detection sections based on their detection timing and position, thereby improving reliability while maintaining multiple operation zones.
3Measurement precision
If dedicated detection sensors are added for door operation detection, then detection precision improves, but manufacturing cost increases
Solution Approach 1:
The detection sections use existing back sonar sensors that serve multiple functions: rear obstacle detection and door opening/closing detection. By making the detection system universal and multi-functional, no additional dedicated sensors are required, maintaining manufacturing cost-effectiveness while achieving sufficient detection precision for door operation through the multi-zone operation and priority determination mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves user convenience by allowing door operation in easier zones and reduces false detections, while utilizing existing back sonar sensors to maintain cost-effectiveness.
Implementation Method 1
a detection unit having three or more detection sections that detect a detected object around the door
Implementation Method 2
as the detection unit having three or more detection sections, a back sonar mounted on a vehicle in recent years can be used
Data Source
AI summary
A vehicle door opening and closing device includes: a detection unit having three or more detection sections configured to detect an object, wherein each of the detection sections has a detection range for the object, and two or more operation zones are defined by partial overlapping of the detection ranges of the detection sections which are adjacent to each other; and a control section configured to cause a door driving section to control a door to open and close when a predetermined movement performed by the object is detected in any of the two or more operation zones. The control section is configured to use detection results of two of the detection sections corresponding to the operation zone where the object has first been detected for detection of movement of the object in preference to other detection results.