18464335. FOREIGN OBJECT DETECTION APPARATUS AND METHOD, AND WIRELESS CHARGING TRANSMIT-END DEVICE simplified abstract (Huawei Technologies Co., Ltd.)
FOREIGN OBJECT DETECTION APPARATUS AND METHOD, AND WIRELESS CHARGING TRANSMIT-END DEVICE
Organization Name
Inventor(s)
Shuangquan Chen of Shenzhen (CN)
FOREIGN OBJECT DETECTION APPARATUS AND METHOD, AND WIRELESS CHARGING TRANSMIT-END DEVICE - A simplified explanation of the abstract
This abstract first appeared for US patent application 18464335 titled 'FOREIGN OBJECT DETECTION APPARATUS AND METHOD, AND WIRELESS CHARGING TRANSMIT-END DEVICE
Simplified Explanation
The abstract describes a foreign object detection apparatus that uses a controller, resonant network, signal coupler, and phase difference detector. The apparatus detects the presence of foreign objects in a specific area based on the phase difference between an excitation signal and a resonance current signal.
- The signal coupler obtains a resonance current signal from the resonant network and couples it with a preset carrier signal to obtain a coupled current signal.
- The phase difference detector extracts a low-frequency signal component from the coupled current signal and determines a phase difference signal based on it.
- The amplitude of the phase difference signal indicates the phase difference between the excitation signal and the resonance current signal.
- The controller determines the presence of a foreign object in the detection area based on the amplitude of the phase difference signal.
Potential Applications
- Industrial manufacturing: Detecting foreign objects in production lines to prevent damage to equipment or products.
- Security systems: Identifying unauthorized objects in restricted areas.
- Medical devices: Detecting foreign objects in medical equipment or implants to ensure patient safety.
Problems Solved
- Accurate foreign object detection: The apparatus provides a reliable method to detect the presence of foreign objects in a specific area.
- Non-intrusive detection: The technology allows for detection without physical contact, reducing the risk of damage or interference.
Benefits
- Improved safety: The apparatus helps prevent accidents or malfunctions caused by foreign objects.
- Efficiency: It enables quick and automated detection, reducing the need for manual inspections.
- Versatility: The technology can be applied in various industries and settings.
Original Abstract Submitted
The technology of this application relates to a foreign object detection apparatus that includes a controller, a first resonant network, a signal coupler, and a phase difference detector. The signal coupler may obtain a resonance current signal corresponding to the first resonant network, and couple the resonance current signal to a preset carrier signal to obtain a coupled current signal. A frequency of the preset carrier signal can be the same as a frequency of an excitation signal. The phase difference detector may extract a low-frequency signal component from the coupled current signal, and determine a phase difference signal based on the low-frequency signal component. An amplitude of the phase difference signal correspondingly indicates a phase difference between the excitation signal and the resonance current signal. The controller may determine, based on the amplitude of the phase difference signal, whether a foreign object exists in a detection area corresponding to the first resonant network.
