Vehicle Door Control Unit Distinguishes Users from Obstacles
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Solution Overview
Problem
Existing door opening and closing devices for vehicles may erroneously operate due to the detection of obstacles, such as movable baggage or fixed objects, especially when multiple detection objects are present, leading to incorrect door control.
Innovation Solution
A door opening and closing device equipped with a detection unit, memory, and control unit that distinguishes between obstacles and users by analyzing detection results and stored information, performing door control only when a valid user movement is detected, and excluding static obstacles from the detection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the detection unit detects all objects within the detection range, then the detection coverage is improved, but the reliability of door control deteriorates due to erroneous detection of obstacles
Solution Approach 1:
The patent segments the detection range into multiple detection zones (first detection zone and second detection zone) with different functions. The first detection zone detects objects approaching the vehicle, while the second detection zone detects objects near the door. This segmentation allows the system to differentiate between relevant detection targets (users) and irrelevant obstacles, improving door control reliability while maintaining comprehensive detection coverage.
Solution Approach 2:
The patent performs preliminary detection and classification of objects before executing door control. The control unit determines whether detected objects are relevant targets based on their position in different detection zones and movement patterns before triggering door opening/closing actions. This preliminary action prevents erroneous door control caused by obstacles.
2Ease of operation
If the door opens automatically when any detection object is detected, then the ease of operation is improved, but the reliability deteriorates due to erroneous operation from obstacle detection
Solution Approach 1:
The patent implements dynamic door control strategies based on real-time detection results. When a relevant detection target is identified in the second detection zone with appropriate movement patterns, the door opens automatically. When obstacles are detected or detection patterns don't match user behavior, the door remains closed. This dynamic adjustment maintains ease of operation for legitimate users while preventing erroneous operations.
Solution Approach 2:
The control unit continuously monitors detection results and adjusts door control decisions based on feedback from the detection unit. The system evaluates object position, movement patterns, and detection zone information to determine whether to execute door opening/closing commands. This feedback mechanism ensures automatic operation convenience while maintaining high reliability by preventing erroneous operations from obstacle detection.
3Measurement precision
If the detection sensitivity is increased to detect user movement accurately, then the measurement precision is improved, but the reliability deteriorates due to detection of static obstacles
Solution Approach 1:
The patent employs periodic detection and evaluation cycles to distinguish between static obstacles and moving users. The detection unit continuously scans the detection range, and the control unit evaluates detection results over time based on object position changes and movement patterns. This periodic action allows high detection sensitivity to capture user movements while filtering out static obstacles that remain in the same position across multiple detection cycles.
Solution Approach 2:
The patent changes detection parameters dynamically based on detection context. The system adjusts evaluation criteria for detection objects based on their position in different detection zones and their movement characteristics. Objects in the second detection zone with movement patterns consistent with user behavior are identified as relevant targets, while static objects or objects with inconsistent movement patterns are classified as obstacles. This parameter change approach maintains high measurement precision while ensuring door control stability.
Data Source
AI summary
A door opening and closing device includes: a door opening and closing drive unit capable of opening and closing a door with respect to a vehicle body; a detection unit configured to detect a plurality of detection objects around the door; a memory part configured to store a detection result of the plurality of detection objects which are detected by the detection unit; and a control unit configured to perform an open/close control of the door by way of the door opening and closing drive unit. The control unit performs an open/close control of the door based on a detection result of the detection unit and a plurality of stored information stored in the memory part.