Vehicle Access Sensor Plausibility Check for False Triggering
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Solution Overview
Problem
Existing vehicle access systems face challenges in reliably detecting activation actions due to environmental influences like vibrations and movements, leading to false triggering and complex safety mechanisms.
Innovation Solution
An access system utilizing a combination of actuation and information sensors for inductance detection, where the second inductance detection provides additional information to verify the plausibility of the activation action, reducing false triggering through a plausibility check.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If touch- and pressure-sensitive sensors as well as proximity sensors are used to detect activation actions, then the ease of operation is improved, but the reliability deteriorates due to false triggering from environmental influences like vibrations and movements
Solution Approach 1:
The sensor system is segmented into multiple independent sensors (touch sensor, pressure sensor, proximity sensor) that each detect different aspects of user interaction. By dividing the detection function across multiple sensors, the system can cross-validate signals and filter out false positives from environmental vibrations while maintaining ease of operation through intuitive gestures.
Solution Approach 2:
The system implements feedback mechanisms where sensor outputs are continuously monitored and evaluated against expected patterns. When environmental vibrations cause anomalous readings, the feedback loop detects these as deviations from normal activation patterns and suppresses false triggering, thereby improving reliability without affecting user convenience.
2Reliability
If complex mechanical safety devices are used to prevent false triggering in the event of a crash, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical safety devices with an electronic sensor evaluation system that uses software-based plausibility checks. The control unit analyzes sensor signals to detect crash conditions and prevent false triggering through logical evaluation rather than mechanical mechanisms, significantly reducing device complexity while maintaining or improving reliability.
Solution Approach 2:
The system changes operational parameters dynamically based on detected conditions. During normal operation, sensors are highly sensitive to detect subtle activation actions. When a crash is detected through sensor pattern analysis, the system changes parameters to become less sensitive or to require different activation patterns, preventing false triggering without needing complex mechanical safety devices.
3Reliability
If multiple sensors are used to detect activation actions and perform plausibility checks, then the reliability is improved, but the device complexity increases
Solution Approach 1:
Multiple sensors (touch, pressure, proximity) and their evaluation functions are merged into a single integrated control unit. This consolidation allows the system to perform comprehensive plausibility checks using data from all sensors while managing complexity through unified processing logic rather than separate evaluation circuits for each sensor.
Solution Approach 2:
The control unit is designed with universal functionality to handle multiple sensor types and evaluation scenarios through a single platform. It can perform plausibility checks, crash detection, and activation validation using the same hardware and software architecture, reducing overall device complexity compared to having dedicated systems for each function.
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 system enhances the reliability and safety of detecting activation actions by distinguishing actual activations from interference, allowing for simpler and cost-effective operation.
Implementation Method 1
an actuation sensor (30), in particular a first inductance detection (110), by means of which a deformation (50) in an activation region (40) can be detected
Implementation Method 2
an information sensor (35), in particular a second inductance detection (120), by means of which interference or environmental influences on a detection of the activation action can be determined
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
The invention relates to an access system (200) for a vehicle (3), in particular for activating an electric lock (2) of the vehicle (3), comprising: - at least one actuation sensor (30) by which a first inductance detection (110) can be carried out to detect an activation action, - at least one information sensor (35) by which a second inductance detection (120) can be carried out, so that additional information about the activation action can be determined, thereby making the detection of the activation action plausible.