Vehicle Door Handle Sensor Shielding for False Triggering
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Solution Overview
Problem
Inductive sensor systems in vehicle door handles are prone to errors and interferences, such as false triggering when approached with cell phones or metallic objects, leading to unreliable detection of activation actions.
Innovation Solution
A sensor system with a modular design featuring a deformation region in the door handle or vehicle outer skin, equipped with an inductive activation means and a sensor device for inductance measurement, and a shielding element to prevent interference, allowing reliable detection of activation actions through deformation measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an inductive sensor device is used to detect activation actions on the door handle, then the detection range and sensitivity are improved, but false triggering occurs when approached with cell phones or metallic objects
Solution Approach 1:
A shielding element is introduced as an intermediary component between the inductive sensor device and external metallic objects or cell phones. This shielding element selectively blocks interference fields from false sources while allowing the sensor to detect genuine activation actions on the door handle, thus resolving the contradiction between detection sensitivity and false triggering.
2Ease of operation
If the inductive sensor is highly sensitive to detect subtle activation actions, then the ease of operation is improved, but the susceptibility to interference from external objects increases
Solution Approach 1:
The shielding element is designed to convert the harmful interference effect into a beneficial filtering function. By strategically positioning and configuring the shielding element, it blocks harmful electromagnetic fields from metallic objects and cell phones while maintaining the sensor's ability to detect legitimate user interactions with the door handle, thus transforming the interference problem into an improved operational reliability.
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 provides reliable and error-free detection of activation actions, preventing false triggering and ensuring secure and convenient operation of vehicle locks.
Implementation Method 1
at least one sensor device arranged on the actuating element, for example within the door handle body, or on the movable part of the vehicle, for inductance measurement on the activation means
Implementation Method 2
at least one shielding element is provided for the at least one sensor device in order to avoid interferences during the inductance measurement
Data Source
AI summary
The invention relates to a sensor system (10) for a movable part (1) of a vehicle (3), comprising: an actuating element (20) comprising at least one deformation region (40) in which an activation action can be sensed by an operator (5), at least one inductive activation means (60) arranged in the deformation region (40), and at least one sensor device (30) arranged on the actuating element (20) or on the movable part (1) for inductance measurement on the activation means (60). For this purpose, according to the invention, at least one shielding element (34) is provided for the at least one sensor device (30) in order to avoid interferences during the inductance measurement.