Measuring Transducer Shield Carrier for RF Interference
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Solution Overview
Problem
Existing measuring transducers face challenges in effectively protecting against high-frequency interference, which can affect the accuracy of measured variables, particularly due to the complexity and cost of two-chamber housing designs with partition walls and high-frequency filters.
Innovation Solution
A measuring transducer design featuring an electrically conductive shield and high-frequency filters positioned between the first and second electronic circuit carriers, utilizing a metallic housing with a plated-through hole and an insulating faceplate, forming a Faraday cage to attenuate HF interference, and incorporating LC elements for enhanced filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a two-chamber housing with partition wall and high-frequency filters is used, then protection against RF interference is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines the shielding function and filtering function into a single integrated component - a shield carrier with integrated high-frequency filters. This eliminates the need for separate partition walls and filters, reducing the number of components and simplifying manufacturing while maintaining RF interference protection.
Solution Approach 2:
The shield carrier serves multiple functions simultaneously: it provides electromagnetic shielding, acts as a mounting structure for filters, and serves as a barrier between the first and second circuit carriers. This multi-functionality reduces the overall complexity of the housing structure.
2Object-affected harmful factors
If a two-chamber housing with partition wall is used, then protection against RF interference is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the shielding function and filtering function into a single integrated component - a shield carrier with integrated high-frequency filters. This eliminates the need for separate partition walls and filters, reducing the number of components and simplifying manufacturing while maintaining RF interference protection.
3Volume of moving object
If electronic circuits are positioned close together for compactness, then device size is reduced, but susceptibility to high-frequency interference increases
Solution Approach 1:
The patent introduces a shield carrier as an intermediary structure between the first and second circuit carriers. This shield carrier with integrated filters acts as a mediator that blocks high-frequency interference while allowing the electronic circuits to be positioned in a compact arrangement, thus maintaining small transmitter size without increasing interference susceptibility.
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
This design effectively shields the electronic circuits from high-frequency interference, ensuring accurate signal processing while being cost-effective and compatible with 'intrinsically safe' protection standards, maintaining high signal integrity and reducing manufacturing complexity.
Implementation Method 1
an electrically conductive shield and high-frequency filter for protection against RF interference that may enter the housing assembly via the connecting leads; the shielding comprises an electrically insulating shield carrier with a metallic shielding layer
Implementation Method 2
high-frequency filters are incorporated into the metallic partition, which already acts as a shield, to attenuate the RF signals
Implementation Method 3
incorporating LC elements for enhanced filtering
Data Source
Figure 1
AI summary
The invention relates to a measuring transducer for providing a measured value for a control system, comprising a sensor (15, 16) having a converter for outputting a primary signal dependent on the measurement variable, a first electronic circuit (14) for processing the primary signal to form an intermediate signal, a second electronic circuit for processing the intermediate signal to form a signal presenting the measured value, wherein the second electronic circuit has a signal output for outputting the signal to connection lines, a housing arrangement having a metallic material, wherein the first electronic circuit has at least one first circuit carrier and the second electronic circuit has at least one second circuit carrier, and wherein the first and second electronic circuits are positioned at a distance from each other in the housing assembly, and an electrically conductive shielding and high-frequency filters for protection from HF interference, which can penetrate the housing arrangement via the connection lines, wherein the electrically conductive shielding and the high-frequency filters are between the first and second circuit carriers.