Magnetic Input Device for Vehicle Interfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive touch detection in vehicle user interfaces is prone to errors due to foreign bodies, interference, and unreliable positional detection, especially for small changes, and requires multiple calibration steps, limiting operational safety and comfort.
Innovation Solution
An input device using a magnetic measuring field with a movably mounted actuating member and a detection system comprising a Hall sensor and resonant circuit for precise position detection, allowing for reliable contactless operation and differentiation of operators based on body capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If capacitive touch detection is used for position detection, then the structure is simple and manufacturing is easy, but the detection reliability deteriorates due to foreign bodies, interference fields, and static charge
Solution Approach 1:
The patent replaces the capacitive detection system with a magnetic field-based detection system. The actuating member contains a magnet that interacts with a Hall sensor or magnetic field detector, substituting the electrical capacitance-based mechanism with a magnetic field-based mechanism. This substitution eliminates susceptibility to foreign bodies, interference fields, and static charge while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the detection parameter from electrical capacitance to magnetic field properties. By using a magnet in the actuating member and a Hall sensor or magnetic field detector in the detection device, the system measures magnetic field strength or direction instead of electrical capacitance, fundamentally changing the detection parameter to one that is not affected by foreign bodies or static charge.
2Device complexity
If capacitive touch detection is used, then the device structure remains simple, but the measurement precision deteriorates for small positional changes
Solution Approach 1:
The patent replaces the capacitive detection system with a magnetic field-based detection system. The actuating member contains a magnet that interacts with a Hall sensor or magnetic field detector, substituting the electrical capacitance-based mechanism with a magnetic field-based mechanism. This substitution eliminates susceptibility to foreign bodies, interference fields, and static charge while maintaining manufacturing feasibility.
Solution Approach 2:
The patent changes the detection parameter from electrical capacitance to magnetic field properties. By using a magnet in the actuating member and a Hall sensor or magnetic field detector in the detection device, the system measures magnetic field strength or direction instead of electrical capacitance, fundamentally changing the detection parameter to one that is not affected by foreign bodies or static charge.
3Ease of operation
If capacitive detection is used, then the system is simple to operate, but operational safety deteriorates due to requirement for visual checks
Solution Approach 1:
The patent replaces the capacitive detection system with a magnetic field-based detection system. The actuating member contains a magnet that interacts with a Hall sensor or magnetic field detector, substituting the electrical capacitance-based mechanism with a magnetic field-based mechanism. This substitution eliminates susceptibility to foreign bodies, interference fields, and static charge while maintaining manufacturing feasibility.
4Device complexity
If capacitive touch detection is used, then the input device structure is simple, but the adaptability deteriorates for glove-wearing operators
Solution Approach 1:
The patent replaces the capacitive detection system with a magnetic field-based detection system. The actuating member contains a magnet that interacts with a Hall sensor or magnetic field detector, substituting the electrical capacitance-based mechanism with a magnetic field-based mechanism. This substitution eliminates susceptibility to foreign bodies, interference fields, and static charge while maintaining manufacturing feasibility.
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 magnetic measuring field system provides reliable and error-resistant positional detection, enabling precise control of vehicle components without visual distraction and accommodating glove-wearing operators, enhancing operational safety and comfort.
Implementation Method 1
The actuating member cooperates with the detection device via a magnetic measuring field, e.g. a static magnetic field or an alternating magnetic field, in order to transmit to the evaluation unit at least one position parameter related to a position and/or a change of position of the actuating member relative to the housing
Implementation Method 2
an input device using a magnetic measuring field with a movably mounted actuating member and a detection system comprising a Hall sensor and resonant circuit for precise position detection
Data Source
AI summary
The present disclosure relates to an input device of a vehicle user interface with a housing, with a detection device assigned to the housing, with an evaluation unit connected to the detection device in an electrically conductive manner, and with an actuating member movably mounted on the housing, wherein the actuating member cooperates with the detection device via a magnetic measuring field, e.g. a static magnetic field or an alternating magnetic field, in order to transmit to the evaluation unit at least one position parameter related to a position and/or a change of position of the actuating member relative to the housing, wherein the evaluation unit is designed to carry out a switching or controlling function of a vehicle component depending on the position parameter.