Virtual Switch Sensor Segmentation for False Trigger Prevention
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Solution Overview
Problem
Existing virtual switches for vehicle moving parts, such as doors and tailgates, often trigger false actuation signals when unwanted objects like cats or balls are detected, leading to operational unreliability.
Innovation Solution
A method and device utilizing a sensor system with at least two non-contact capacitance sensors that monitor an object's approach and movement pattern, including timers to ensure accurate detection and prevent false triggers, along with optional authentication and calibration processes to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single non-contact sensor is used to detect object approach, then the ease of operation is improved (hands-free activation), but the reliability deteriorates (false triggers from unwanted objects like cats or balls)
Solution Approach 1:
The sensor system is segmented into multiple independent non-contact sensors (at least two) that detect different aspects of object approach. Each sensor monitors specific parameters, and their combined evaluation through logical operations (AND/OR gates) enables discrimination between intentional user activation and false triggers from unwanted objects, thereby maintaining ease of operation while improving reliability
Solution Approach 2:
The system implements feedback mechanisms where sensor outputs are continuously monitored and evaluated against predefined criteria. The control unit processes sensor signals in real-time, applying logical operations and time-based validation to determine whether activation conditions are genuinely met, providing feedback control that prevents false triggers while maintaining responsive hands-free operation
2Reliability
If multiple sensors with complex evaluation logic are implemented, then the reliability is improved (reduced false triggers), but the device complexity increases
Solution Approach 1:
The control unit is segmented into distinct functional modules: sensor signal reception, time measurement, logical evaluation (AND/OR operations), and activation control. This modular segmentation allows each component to perform a specific function, simplifying the overall system architecture while achieving reliable false trigger prevention through coordinated operation of specialized subsystems
Solution Approach 2:
The system performs preliminary actions by pre-defining activation criteria, logical evaluation rules, and time-based validation parameters before operation begins. These preliminary configurations enable the sensor system to automatically discriminate between valid and false activation attempts without requiring complex real-time decision-making, thereby reducing device complexity while maintaining high reliability
3Reliability
If the sensor system continuously monitors for object approach, then the reliability is improved (accurate detection), but the energy consumption increases
Solution Approach 1:
The sensor system employs periodic monitoring rather than continuous operation. Sensors are activated in cycles or triggered by specific events, with monitoring intensity adjusted based on detection needs. This periodic action maintains accurate detection capability when required while significantly reducing energy consumption during idle periods, resolving the contradiction between reliable detection and energy efficiency
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
The solution significantly reduces false actuation signals, improving the operational reliability of virtual switches by accurately detecting intended user movements and preventing accidental openings, while also conserving energy by only activating when necessary.
Implementation Method 1
The sensor system comprises at least two non-contact sensors, which are configured as capacitance sensors
Data Source
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AI summary
The invention relates to a method for actuating a virtual switch (50) with a sensor system (17.2) which detects an actuation of the switch (50), wherein the sensor system (17.2) comprises at least two non-contact sensors (11, 12). According to the invention, the method is only restarted when all sensors (11, 12) have first been deactivated.