Wireless Charging Double Detection Circuit Noise Filtering
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Solution Overview
Problem
Current wireless charging systems face challenges in accurately capturing signals due to noise interference, leading to unclear signal detection and inefficient power transmission.
Innovation Solution
A wireless charging system with double detecting circuits, including an inductive loop with an induction coil and capacitor, a power loop with a driving circuit, and a control loop with a processor and detection circuits, which utilizes auxiliary detection points to filter noise and adjust power supply based on detected waveforms, ensuring clear signal detection and efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single detection circuit is used in wireless charging system, then the device complexity is reduced, but the signal detection precision deteriorates due to noise interference
Solution Approach 1:
The detection function is segmented into two independent detection circuits: a first detection circuit connected to the inductive loop and a second detection circuit connected to the power loop. Each circuit independently detects signals and generates detection waveforms, allowing the system to compare multiple signals to identify and filter noise, thereby improving detection precision without overcomplicating the system
Solution Approach 2:
The system implements feedback by comparing the detection waveform from the first detection circuit with the reference waveform from the second detection circuit. The processor continuously monitors the captured signal against the reference signal and adjusts the power transmission accordingly, enabling real-time noise filtering and signal validation through feedback mechanisms
2Reliability
If noise filtering is implemented in wireless charging signal detection, then the reliability of charging control is improved, but the response time deteriorates due to additional processing
Solution Approach 1:
The second detection circuit generates a reference waveform in advance that represents the expected clean signal pattern. This reference waveform is prepared beforehand and stored for comparison, allowing the first detection circuit to quickly validate captured signals against the pre-prepared reference without requiring complex real-time filtering algorithms, thus maintaining fast response while ensuring reliability
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 effectively filters noise and accurately determines the presence of a charging device, optimizing power transmission and reducing errors in signal detection, thereby enhancing the reliability and efficiency of wireless charging.
Implementation Method 1
the wireless charger has a coil, wherein AC electromagnetic field is generated by the AC via the coil
Implementation Method 2
There is another coil in the electric receiver device for receiving the AC electromagnetic field, and converted into electrical energy for charging its battery
Data Source
AI summary
A wireless charging system with double detecting circuits comprises a detecting circuit connected to an inductive loop to detect the induced electric field of the inductive loop; an auxiliary detection circuit connected to a power loop to detect the induced electric field of the power loop, wherein when the waveform detected by the detecting circuit is not applicable, it is replaced by the waveform detected by the auxiliary detecting circuit in order to determine the condition of the electrical receiver device and thus adjust the output to the inductive loop from the power loop.