Vehicle Door Handle NFC Filter Tolerance Compensation
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Solution Overview
Problem
Component tolerances in filter circuits for contactless data transmission lead to deviations in filter properties, impairing data transmission and increasing energy consumption, making it technically complex and expensive to reduce these deviations.
Innovation Solution
An assembly component with a tolerance compensation unit, integrated into the transmission path, compensates for deviations in filter circuits by adjusting the filter properties, ensuring reliable data transmission and reducing energy consumption through bandpass filtering and capacitive coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If filter circuits are used for contactless data transmission, then data transmission capability is improved, but component tolerances cause deviations in filter properties leading to impaired transmission and increased energy consumption
Solution Approach 1:
The patent applies parameter changes by introducing a tolerance compensation unit that dynamically adjusts the filter circuit's parameters (such as resonance frequency and bandwidth) to compensate for manufacturing tolerances. This allows the filter to maintain its optimal performance despite variations in component values, thereby resolving the contradiction between reliability and manufacturing precision.
Solution Approach 2:
The tolerance compensation unit functions as a feedback mechanism that detects deviations in filter properties caused by component tolerances and automatically adjusts compensation components to restore the desired filter characteristics. This feedback loop ensures consistent data transmission reliability without requiring high manufacturing precision.
2Measurement precision
If filter circuits are used for contactless data transmission, then frequency selection capability is improved, but tolerance deviations require technically complex and costly measures to reduce
Solution Approach 1:
Instead of complex mechanical adjustments or multiple filter stages, the patent uses parameter changes by varying the electrical characteristics of compensation components (capacitors or inductors) to achieve frequency tuning. This approach maintains precise frequency selection while avoiding technically complex and costly solutions.
Solution Approach 2:
The tolerance compensation unit acts as an intermediary element between the fixed filter circuit and the variable signal frequency. It mediates the effect of manufacturing tolerances by introducing adjustable compensation components that simplify the overall system while maintaining frequency selection precision.
3Manufacturing precision
If tolerance compensation is implemented, then manufacturing tolerances can be greater, but additional circuit components are required
Solution Approach 1:
The tolerance compensation unit serves as an intermediary that can be integrated into the existing filter circuit topology. By adding only one or two compensation components (capacitors or inductors) in series or parallel with existing filter elements, the patent enables greater manufacturing tolerances without significantly increasing device complexity.
Solution Approach 2:
The compensation components are merged with the existing filter circuit components, sharing the same physical space and electrical topology. This integration approach allows tolerance compensation functionality to be added with minimal increase in overall device complexity while enabling greater manufacturing tolerances.
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 tolerance compensation unit allows for greater manufacturing tolerances, ensuring consistent data transmission and reduced energy consumption by maintaining a specific passband and center frequency, even with deviations in component properties, thus enhancing the robustness of the filter circuit.
Implementation Method 1
a filter circuit, preferably for forming a bandpass filter and/or band filter, which is integrated into the at least one transmission path at least to provide bandpass filtering
Implementation Method 2
at least one electrical (preferably electronic and/or capacitive) tolerance compensation unit to compensate for tolerance deviations (in particular tolerance-related deviations or changes) of the filter circuit
Implementation Method 3
Data transmission can be implemented via inductive coupling and/or NFC
Data Source
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AI summary
The invention relates to an assembly component (100), in particular a door handle (3), for a vehicle (1) for contactless data transmission between the vehicle (1) and a mobile device (200), preferably for NFC communication, comprising: - at least one electronic processing means (50) for receiving and/or transmitting signals for data transmission via an antenna (80), - at least one transmission path (14) to connect the antenna (80) for data transmission to the processing means (50), - a filter circuit (20) which is integrated into the at least one transmission path (14) at least to provide bandpass filtering, - at least one electrical tolerance compensation unit (60) to compensate for tolerance deviations of the filter circuit (20).