Medical Cable Crosstalk Reduction via Insulative Barriers
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Solution Overview
Problem
Medical device cables, particularly in pulse oximetry systems, are vulnerable to crosstalk interference due to the manufacturing process, where wires are stripped and untwisted, making them susceptible to noise and inductive and capacitive crosstalk, which can lead to inaccurate readings.
Innovation Solution
The use of an insulative material or a printed circuit board to maintain spatial separation between wires, coupled with a connector housing to prevent proximity and encapsulate the wires, reducing the likelihood of crosstalk interference during the manufacturing and handling processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wires are stripped and untwisted during manufacturing to connect to connector pins, then ease of manufacture is improved, but crosstalk interference increases
Solution Approach 1:
The patent applies preliminary action by maintaining wire twists and protective coatings through the manufacturing process rather than stripping and untwisting wires early. The connector housing is designed to accommodate twisted wires in their protected state, allowing connection to be made without compromising the crosstalk protection provided by the twists and coatings.
Solution Approach 2:
The patent introduces an intermediary connector housing that facilitates wire connections while maintaining the protective twists and coatings. The housing provides a mechanism to access and connect individual wires without requiring complete untwisting or removal of protective layers, thus mediating between the need for connection and the need for crosstalk protection.
2Productivity
If multiple wires are bundled together in a cable, then productivity is improved, but crosstalk between wires increases
Solution Approach 1:
The patent applies segmentation by dividing the cable into sections with insulative barriers positioned between groups of wires. These barriers segment the electromagnetic fields of adjacent wires, preventing crosstalk while allowing the wires to remain bundled together for efficient cable construction and handling.
Solution Approach 2:
Insulative barriers serve as intermediaries between adjacent wire groups, providing electrical isolation while allowing the wires to maintain their bundled configuration. These barriers enable high-density wire packing without sacrificing crosstalk protection.
3Object-affected harmful factors
If wires are spatially separated to reduce crosstalk, then crosstalk interference is reduced, but device complexity increases
Solution Approach 1:
The patent merges the functions of crosstalk protection and wire organization into a single integrated connector housing design. The housing incorporates insulative barriers and structural features that maintain wire separation and provide crosstalk protection as unified elements, rather than adding separate protection components.
Solution Approach 2:
The patent uses thin insulative barriers and coatings that provide effective electrical isolation between wires without adding significant bulk or complexity. These thin film solutions maintain wire separation while keeping the overall device compact and manageable.
4Object-affected harmful factors
If connector housing encapsulates wires to prevent proximity, then crosstalk is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The connector housing is designed with pre-formed insulative barriers and wire positioning features that guide wire placement during assembly. This preliminary structuring of the housing reduces the precision required during wire insertion and connection, as the housing itself provides the separation and positioning geometry.
Data Source
AI summary
A device and method for reducing crosstalk between wires is provided. The method includes spatially separating first and second sets of wires. A device is disposed relative to the first and second sets of wires to maintain the spatial separation. The method also comprises coupling pins to the first and second sets of wires. Additionally, the method includes covering the device with a connector housing.