PCB Edge Contact Pads for Aircraft Signal Routing and Installation Verification
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Solution Overview
Problem
The complexity of routing power and data signals through connectors in aircraft power distribution systems increases the complexity of circuit board installations, and there is a need for a reliable method to verify the correct installation of similar-looking circuit boards.
Innovation Solution
The use of conductive pads arranged in unique patterns on printed circuit boards and card guides for signal communication, which reduces the need for connectors and allows verification of proper installation by matching patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all power and data signals are routed through electrical connectors, then signal communication is achieved, but system complexity increases significantly
Solution Approach 1:
The patent segments the signal routing function by separating power signals and data signals into different routing paths. Power signals are routed through the card guide structure while data signals use edge conductive pads, dividing the complex connector routing into simpler, dedicated pathways that reduce overall system complexity
Solution Approach 2:
The card guide structure serves multiple functions simultaneously: it provides mechanical support and positioning for the circuit board, acts as a shield for power signals, and serves as a routing path for power connections. This multi-functionality eliminates the need for separate dedicated structures for each function, reducing system complexity
2Productivity
If circuit boards have similar appearances, then manufacturing efficiency is improved, but installation verification becomes difficult
Solution Approach 1:
The patent applies local quality by creating unique patterns of conductive pads at specific locations on each circuit board type. These localized patterns serve as identification features that allow easy verification of correct board installation without affecting the overall manufacturing efficiency or requiring different board designs
3Manufacturing precision
If guide pins or keying aids are used to ensure correct installation, then installation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses asymmetric patterns of conductive pads arranged in unique configurations for each circuit board type. These asymmetric patterns provide inherent directional guidance and verification capabilities, ensuring correct installation orientation and board identification without requiring additional symmetric guide pins or keying mechanisms
Solution Approach 2:
The conductive pad patterns serve a dual purpose: they provide the electrical connection function and simultaneously serve as self-verification indicators for correct installation. The patterns are designed so that proper alignment automatically confirms correct board placement, eliminating the need for separate verification mechanisms
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 solution reduces system complexity, minimizes electromagnetic interference, and ensures correct installation of circuit boards without the need for guide pins or keying aids, while providing a method to verify proper signal routing and reduce connector usage.
Implementation Method 1
The plurality of first board conductive pads and the plurality of first guide conductive pads mate to provide signal communication between the first circuit board and the first card guide
Data Source
AI summary
A system includes a first circuit board and a first card guide configured to receive the first circuit board. The first circuit board includes a plurality of first board conductive pads arranged in a first board pattern. The first card guide includes a plurality of first guide conductive pads arranged in a first guide pattern. The plurality of first board conductive pads and the plurality of first guide conductive pads mate to provide signal communication between the first circuit board and the first card guide.