USB Port Status Detection via Charging Interface Voltage Measurement
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Solution Overview
Problem
Existing systems often fail to accurately detect the connection status of a universal serial bus (USB) port on mobile phones, leading to errors and incorrect data reading from memory cards.
Innovation Solution
A detection system comprising a receiving module, voltage measuring module, detection module, and update module that measures voltage changes at the charging interface to determine the connection status of the USB port, distinguishing between connecting, connected, disconnecting, and disconnected states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the computer detects the USB port connection status, then data transfer between mobile phone and computer is enabled, but the connection status is not detected correctly leading to errors
Solution Approach 1:
The patent introduces a voltage measuring module as an intermediary detection component that measures the voltage at the charging interface as an intermediate parameter. This voltage measurement serves as a mediator to indirectly determine the USB connection status, resolving the inaccurate direct detection problem between the computer and USB port.
Solution Approach 2:
The patent replaces the computer's direct electrical connection status detection with a voltage measurement system. By substituting the mechanical/electrical detection method with an electrical voltage measurement method, the system achieves more accurate and reliable connection status detection through measuring voltage changes at the charging interface.
2Measurement precision
If voltage measurement is performed continuously to detect connection status, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic voltage measurement at the charging interface instead of continuous measurement. The detection module periodically samples the voltage to determine connection status changes, which reduces energy consumption while maintaining sufficient detection accuracy for USB connection events.
Solution Approach 2:
The patent employs dynamic detection by monitoring voltage changes over time intervals. The system adapts its measurement approach by detecting voltage transitions that indicate connection status changes, rather than using fixed continuous measurement, thereby optimizing energy consumption based on actual connection events.
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
Enables accurate detection of USB port status, ensuring correct data transfer and reducing errors by stabilizing the connection status detection through voltage measurement intervals.
Implementation Method 1
a voltage of the charging interface is measured
Data Source
AI summary
A system and method are provided for detecting connection status of a universal serial bus (USB) port of a mobile phone and a terminal device from among connecting, connected, disconnecting, or disconnected status. A voltage of the USB port is the same as a voltage of a charging interface of the mobile phone. The voltage of the charging interface is detected. The connection status of the mobile phone stored in a storage system is updated according to the voltage status of the charging interface.