Vehicle Door Actuation Using Dual Sensor Verification
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Solution Overview
Problem
Most vehicles require manual hand operation to open or close doors or flaps, which is inconvenient when both hands are occupied, and existing automatic systems are prone to false activations.
Innovation Solution
A contactless method and device that automatically open or close vehicle doors or flaps using movement detection and a key signal, ensuring activation only when a directional change and key presence are confirmed, with optional optical and acoustic feedback and field strength threshold checks to prevent unintended operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic opening system is implemented, then hands-free operation is enabled, but false activation risk increases
Solution Approach 1:
The automatic opening function is divided into two independent detection systems: movement detection (first sensor device) and key detection (second sensor device). Both systems must simultaneously confirm their respective conditions before triggering door opening, preventing false activation by requiring dual verification rather than relying on a single detection mechanism.
Solution Approach 2:
The system incorporates feedback mechanisms where the control unit continuously monitors signals from both sensor devices and only actuates the door when both conditions are satisfied. This feedback loop ensures that automatic opening occurs only when genuine user intent is detected through coordinated signals from both independent detection systems.
2Ease of operation
If movement detection is used for automatic opening, then convenience is improved, but activation precision deteriorates
Solution Approach 1:
The system merges two independent detection methods (movement detection and key detection) into a unified activation condition. By combining these detection mechanisms, the system achieves both convenience (automatic opening on movement) and precision (requiring key presence confirmation), as neither detection alone is sufficient to trigger door opening.
3Reliability
If key detection is required, then false activation is prevented, but operation complexity increases
Solution Approach 1:
The key detection system serves multiple functions: it authenticates user intent, prevents false activation, and works in conjunction with movement detection to enable hands-free operation. This multi-functionality justifies the added complexity, as the key detection mechanism provides both security verification and operational triggering capabilities.
Data Source
AI summary
In a method and a device (12) for actuating a door or flap (1) of a vehicle (10), the door or flap (1), if it is closed, is automatically opened or, if it is open, is automatically closed if a movement of an object with at least one change in direction is detected outside the vehicle (10) and at the same time a key (6) assigned to the vehicle (10) is detected.