Connector Receptacle Liquid Detection and Corrosion Mitigation
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Solution Overview
Problem
Electronic connector receptacles are prone to corrosion due to liquid ingress, such as sweat or spills, which can cause damage and disrupt connectivity, and existing connection detection methods are compromised by the presence of liquid.
Innovation Solution
The development of connector receptacles with integrated connection-detect and liquid-detect contacts, utilizing side ground contacts and liquid-detect contacts that employ Electrochemical-Impedance Spectroscopy (EIS) to identify liquid presence, along with hydrophobic and hydrophilic coatings to guide liquid to detection points, ensuring reliable connection detection and corrosion mitigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If connection detection contacts are placed in the connector receptacle, then connection detection capability is improved, but liquid detection accuracy deteriorates due to false readings from connection signals
Solution Approach 1:
The connector receptacle is divided into functionally separate contact zones: connection-detect contacts (CD1, CD2) positioned to engage with the connector insert shield for connection status detection, and liquid-detect contacts (LD1, LD2) positioned on the tongue to detect liquid presence. This spatial segmentation allows independent operation of detection functions without mutual interference.
Solution Approach 2:
The connector insert shield acts as an intermediary element that enables connection detection through engagement with CD contacts while being electrically isolated from the liquid detection pathway. The shield serves as a mediator that transmits connection status information without interfering with liquid detection at the tongue level.
2Reliability
If side ground contacts are positioned to engage first during insertion, then protection from stray voltages is improved, but connector receptacle width increases
Solution Approach 1:
Side ground contacts (SG1, SG2) are positioned to engage with the connector insert shield before other contacts during the insertion process. This preliminary engagement establishes a safe ground reference and dissipates stray voltages before power or data contacts make connection, protecting the system from electrical transients.
Solution Approach 2:
The side ground contacts utilize flexible beam structures that can deflect to accommodate the insertion process while maintaining electrical contact. This flexibility allows the ground contacts to engage early in the insertion sequence without requiring excessive receptacle width, as the beams can bend to reach the shield.
3Difficulty of detecting and measuring
If liquid detection contacts are placed on the tongue, then liquid detection capability is improved, but connection reliability deteriorates due to potential liquid interference with signal contacts
Solution Approach 1:
Liquid detection contacts (LD1, LD2) are positioned specifically on the tongue surface at locations optimized for liquid detection while maintaining adequate spacing from signal and power contacts. This localized placement ensures liquid detection sensitivity without compromising the integrity of data transmission pathways.
Solution Approach 2:
The liquid detection system uses multiple liquid-detect contacts (LD1, LD2) positioned at different locations on the tongue to provide redundant detection coverage. This excessive action approach ensures that liquid presence is detected even if one contact is partially obscured or less sensitive, maintaining high detection reliability.
4Adaptability or versatility
If multiple detection contacts are integrated into the connector receptacle, then comprehensive detection capability is improved, but device complexity increases
Solution Approach 1:
Connection detection and liquid detection functions are merged into a single connector receptacle assembly. The CD contacts and LD contacts are integrated into the same receptacle structure, sharing common mounting features and electrical connection pathways to the controller, thereby reducing overall system complexity despite the increased functionality.
Solution Approach 2:
The connector receptacle is designed as a multi-functional component that simultaneously provides mechanical connection, connection status detection, and liquid presence detection. This universal design eliminates the need for separate detection devices, reducing the overall number of components and simplifying the system architecture.
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 solution effectively prevents corrosion and maintains connection integrity by accurately detecting liquid presence and guiding it to detection points, allowing for timely mitigation of corrosion risks and ensuring reliable operation of electronic devices.
Implementation Method 1
liquid-detect contacts that employ Electrochemical-Impedance Spectroscopy (EIS) to identify liquid presence
Implementation Method 2
hydrophobic and hydrophilic coatings to guide liquid to detection points
Implementation Method 3
hydrophobic and hydrophilic coatings to guide liquid to detection points
Data Source
AI summary
Connector receptacles and connector receptacle interfaces that can detect a connection to a corresponding connector insert, can detect liquid in the connector receptacle, and can limit damage to the connector receptacle caused by the liquid.