Vehicle Door Sensor Design with Enhanced Interference Shielding
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Summary
Problems
Existing vehicle door handle sensors face interference issues due to electronic and electric components, reducing sensitivity and reliability in detecting activation actions, which can be exacerbated by electromagnetic fields, despite the use of shielding elements.
Innovation solutions
A multi-layer printed circuit board with capacitive sensor elements and shielding elements arranged in a three-dimensional configuration to enhance detection reliability and reduce interference, allowing for separate detection regions and functions, such as locking and unlocking, by using capacitive sensing and near-field communication.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If shielding elements are integrated into the door handle to reduce interference, then the reliability of detection is improved, but the device complexity increases
Why choose this principle:
The patent implements nesting by integrating shielding elements within the multi-layer printed circuit board structure. The shielding elements are embedded between functional layers of the PCB, creating a nested configuration where shielding components are contained within the existing door handle assembly without requiring separate external shielding structures. This reduces overall device complexity while maintaining detection reliability.
Principle concept:
If shielding elements are integrated into the door handle to reduce interference, then the reliability of detection is improved, but the device complexity increases
Why choose this principle:
The patent merges the shielding function with the structural components of the door handle by integrating shielding elements into the printed circuit board itself. Rather than adding separate shielding components, the shielding functionality is combined with the existing PCB layers, thereby improving reliability without proportionally increasing device complexity.
Application Domain
Data Source
AI summary:
A multi-layer printed circuit board with capacitive sensor elements and shielding elements arranged in a three-dimensional configuration to enhance detection reliability and reduce interference, allowing for separate detection regions and functions, such as locking and unlocking, by using capacitive sensing and near-field communication.
Abstract
The invention relates to a device ( 10 ) for a vehicle ( 1 ) for detecting an activation action in a detection region ( 51 ), and in particular for mounting on a vehicle part ( 5 ), in order to activate a function of the vehicle ( 1 ) depending on the detection, comprising: a multi-layer printed circuit board ( 20 ), at least one electrically conductive sensor element ( 31 ) for capacitive sensing in the detection region ( 51 ), wherein the sensor element ( 31 ) is arranged on the printed circuit board ( 20 ), at least two shielding elements ( 40 ) for shielding ( 41 ) for the sensing.