Steering Wheel Sensor Isolation via Insulating Anchoring
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Solution Overview
Problem
Existing vehicle steering wheels with conductive sensors face interference from conductive decorative parts, leading to unreliable detection of user contact and position due to disruptions in electrical properties.
Innovation Solution
Incorporating an anchoring part made of electrically insulating material to isolate the conductive decorative part from the conductive framework, preventing grounding and maintaining accurate sensor measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the decorative part is made from conductive material to enhance aesthetics and touchability, then the visual and tactile appearance is improved, but the sensor measurement accuracy deteriorates due to electrical interference
Solution Approach 1:
The patent introduces an anchoring part as an intermediary element between the conductive decorative part and the conductive framework. This anchoring part made of insulating material acts as a mediator that prevents direct electrical contact while still allowing mechanical attachment, thus resolving the conflict between maintaining conductive aesthetics and ensuring accurate sensor measurements
Solution Approach 2:
The patent segments the steering wheel structure into distinct functional zones: the conductive framework for structural integrity and grounding, the insulating anchoring part for electrical isolation, and the conductive decorative part for aesthetic purposes. This segmentation allows each component to fulfill its specific function without interfering with others
2Strength
If the decorative part is electrically connected to the framework for structural support, then the mechanical strength is improved, but the electrical interference disrupts sensor readings
Solution Approach 1:
The anchoring part serves as a mechanical intermediary that provides structural support for attaching the decorative part to the framework while simultaneously acting as an electrical insulator. This dual-function element resolves the contradiction by decoupling mechanical and electrical connections
Solution Approach 2:
The patent applies different material properties to different parts of the steering wheel: the framework is conductive for structural strength and grounding, while the anchoring part is insulating for electrical isolation. This local differentiation of material qualities allows the system to simultaneously achieve mechanical strength and measurement 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
Ensures reliable detection of user contact and position on the steering wheel by preventing disruptions in electrical properties, allowing simultaneous touch of the decorative part and sensor area without affecting measurement accuracy.
Implementation Method 1
the anchoring part is made from an electrically insulating material, so as to electrically insulate the fixing means from the framework
Implementation Method 2
such a sensor typically operates by measuring a variation of an electrical property (resistance, capacitance, impedance, etc.)
Implementation Method 3
such a sensor typically operates by measuring a variation of an electrical property (resistance, capacitance, impedance, etc.)
Data Source
AI summary
A vehicle steering wheel, comprising: —a framework (10) consisting of an electroconductive material; at least one sensor for detecting the position and/or contact (20) of a limb of the user on the steering wheel; at least one decorative part (30) comprising an electroconductive material; fixing means arranged so as to hold the decorative part (30) on the steering wheel; and at least one anchoring part (42) arranged so as to secure the fixing means onto the framework (10).