Interlaced Ground Strap for Multi-Cable EMI Shielding
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Solution Overview
Problem
Existing methods for grounding electrically conductive members, such as shielded cables and wires, are laborious, costly, and prone to degradation due to soldering requirements and vibrations, posing risks to operators and compromising the integrity of the connections over time.
Innovation Solution
A ground strap formed from interlaced electrically conductive filaments is used to establish a common grounded potential among multiple conductive members, which is easier to apply and maintain, reducing labor and costs, and includes heat-set filaments to ensure secure overlapping ends and elongate fixation members for secure attachment to a ground source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soldering is used to ground individual conductive members, then effective grounding connection is achieved, but labor time and cost increase significantly
Solution Approach 1:
Multiple individual grounding operations are merged into a single grounding operation by using one ground strap that simultaneously contacts multiple conductive members through its width, eliminating the need for separate soldering of each member
Solution Approach 2:
The ground strap serves multiple functions simultaneously: it provides grounding for multiple conductive members, acts as a shield against electromagnetic interference, and creates equipotential bonding all in one component
2Reliability
If soldering is used to ground individual conductive members, then effective grounding connection is achieved, but operational safety deteriorates due to heat exposure risks
Solution Approach 1:
The thermal/chemical soldering process is replaced with a mechanical attachment system using clamps or compression connectors that secure the ground strap to conductive members without requiring heat application
Solution Approach 2:
The invention uses sacrificial bonding elements or temporary mechanical fasteners that can be easily applied and removed without damaging the conductive members, replacing permanent solder joints
3Reliability
If soldering is used to ground individual conductive members, then effective grounding connection is achieved, but device reliability deteriorates over time due to vibration and impact effects
Solution Approach 1:
The grounding system uses flexible ground straps that can dynamically accommodate vibrations and movements while maintaining electrical contact, rather than rigid solder joints that are susceptible to fatigue failure
Solution Approach 2:
The design incorporates vibration isolation elements and compliant mounting features that cushion against anticipated vibrations and impacts before they can damage the grounding connection
4Reliability
If individual ground members are soldered to each conductive member, then effective grounding is achieved, but device complexity increases
Solution Approach 1:
Multiple separate grounding components (individual ground wires, solder joints, and connectors for each conductive member) are merged into a single integrated ground strap assembly that grounds all members simultaneously
Solution Approach 2:
The ground strap is designed as a universal grounding solution that can accommodate multiple different conductive members with varying sizes and shapes through its width and flexible construction
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 2~3A
AI summary
A ground strap (10) for grounding electrical cables (12) for protection against at least one of EMI, RFI or ESD and method of construction thereof is provided. The ground strap (10) has a wall (14) with opposite edges (20, 22) extending along a lengthwise direction between opposite ends (16, 18). The wall (14) is formed from a plurality of interlaced filaments, with at least some of the plurality of interlaced filaments including a plurality of electrically conductive filaments interlaced in electrical communication with one another.