Capacitive Cable Presence Detection Circuit
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Solution Overview
Problem
Current systems lack an effective method to detect the presence of a cable properly connected to a device, which can lead to communication issues and data transfer problems due to unclear connection status.
Innovation Solution
A cable presence detection system utilizing a connector with capacitive elements and a voltage source, where a capacitive element is electrically coupled between connector contacts and a ground plane, allowing for a logical output indicating connection status through voltage measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional connection methods are used without detection mechanisms, then the system structure remains simple, but the connection status cannot be accurately determined leading to communication issues
Solution Approach 1:
The patent replaces mechanical connection verification with electrical field-based capacitive sensing. Instead of physically checking connections through mechanical means, the system uses capacitive elements to detect the presence or absence of a cable through electrical field changes, achieving accurate detection while maintaining relatively simple circuit implementation
Solution Approach 2:
The patent introduces capacitive elements as intermediary components between the connector contacts and the detection circuit. These capacitive elements serve as mediators that translate the physical presence of a cable into measurable electrical signals, enabling indirect but accurate detection of connection status
2Reliability
If cable presence detection is implemented, then communication issues are prevented, but additional circuit components are required
Solution Approach 1:
The detection circuit is designed to perform multiple functions: it detects cable presence, determines connection status, and provides logical output signals for further system control. By making the detection circuit multi-functional, the patent achieves high communication reliability without requiring separate dedicated components for each function
Solution Approach 2:
The patent combines the capacitive sensing function, voltage measurement capability, and logical output generation into an integrated detection system. By merging these functions into a unified circuit architecture, the system achieves reliable cable presence detection while minimizing the total number of discrete components required
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 system accurately determines cable connection status, preventing communication issues by providing a clear logical output, and includes ESD mitigation and electromagnetic interference protection.
Implementation Method 1
a capacitive element electrically coupled between a connector contact of the plurality of connector contacts and the ground plane
Data Source
AI summary
The present invention is a system and method for detecting the presence of a cable in a connector. The system may comprise one or more of the following features: (a) a first circuit contact; (b) a second circuit contact; (c) a first capacitive element; (d) an electrical ground; (e) a voltage source; and (f) a logical output. The second circuit contact may be connected to ground. The capacitive element may be driven to ground by connection of the first and second circuit contacts to corresponding cable contacts.