USB Charging Test Circuit for Simulated Plug-Unplug Timing
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Solution Overview
Problem
Current charging tests for electronic devices are inefficient and lack objectivity due to manual simulation of plugging and unplugging behaviors, leading to inaccurate results.
Innovation Solution
A charging test apparatus and method that utilizes a control module to simulate various plugging and unplugging behaviors automatically by controlling connection and disconnection of conductive paths based on preset on/off time parameters, incorporating a detection module to assess charging parameters and determine normalcy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual plugging and unplugging behaviors are performed for charging tests, then test coverage includes various plugging scenarios, but test efficiency is low and test results lack objectivity
Solution Approach 1:
The patent replaces manual mechanical plugging and unplugging operations with an automated control system that uses electronic switches (such as MOS tubes) to simulate connection and disconnection of conductive paths. The control module generates control signals to turn switches on and off according to preset timing parameters, thereby replicating various plugging behaviors (quick plugging, slow plugging, unplugging) without human intervention. This substitution dramatically improves test efficiency while maintaining reliable and objective test results through precise temporal control.
2Productivity
If automated control is introduced to simulate plugging and unplugging behaviors, then test efficiency improves and objectivity increases, but device complexity increases
Solution Approach 1:
The patent segments the charging interface into multiple independent conductive paths (such as VCC, GND, D+, D- pins), each controlled by its own electronic switch. This segmentation allows independent control of each connection path, enabling complex plugging scenarios to be constructed through simple combinations of switch states. The segmentation approach manages device complexity by breaking down the control task into manageable, modular components rather than requiring a monolithic complex system.
Solution Approach 2:
The patent introduces electronic switches as intermediary components between the control module and the conductive paths. These switches act as mediators that translate control signals into physical connection and disconnection actions. By using switches as intermediaries, the system achieves automated control functionality while keeping the overall structure manageable, as the switches handle the complex switching operations without requiring direct complex control logic in the main control module.
3Measurement precision
If multiple conductive paths are controlled with different connection moments, then various plugging behaviors are simulated accurately, but control complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring timing parameters for each conductive path's connection and disconnection moments. The control module stores preset timing data that defines when each switch should be activated or deactivated. This preliminary configuration allows the system to automatically execute complex multi-path plugging scenarios without real-time complex decision-making, thereby achieving high simulation accuracy while keeping control logic manageable through pre-computed timing sequences.
Data Source
AI summary
An embodiment of this application provides a charging test apparatus and method, where the charging test apparatus includes: a first USB interface, a second USB interface matching the first USB interface, a plurality of conductive paths, and a control module, where the first USB interface is configured to connect to an electronic device, and the second USB interface is configured to connect to a charger. The control module is separately electrically connected to each conductive path, and is configured to control connection and disconnection of each conductive path based on a preset on/off time parameter, where the preset on/off time parameter is used to determine a connection start moment of each conductive path. The charging test apparatus provided in this application can improve efficiency of a charging test.