Patch Antenna Wireless Power Transmission Location Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmission systems using the electromagnetic wave scheme face challenges in quickly determining the location of electronic devices for efficient charging, particularly when the device is held or worn by a user, due to the need for forming RF waves in multiple directions and receiving power-related information, which is time-consuming and potentially harmful until the device is accurately detected.
Innovation Solution
A wireless power transmitting device equipped with a plurality of patch antennas that can rapidly transmit and receive reflected waves to determine the location of electronic devices, allowing for quick switching between transmission and reception modes, enabling efficient beamforming and constructive interference for effective power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RF waves are formed in multiple directions to detect electronic device location, then detection accuracy is improved, but detection time increases
Solution Approach 1:
The system performs preliminary scanning in a first direction to quickly detect the presence of an electronic device before conducting more accurate location determination in a second direction. This preliminary action reduces the overall detection time by avoiding unnecessary multi-directional scanning when no device is present.
Solution Approach 2:
The detection process is divided into two separate scanning directions: a first direction for initial device presence detection and a second direction for precise location determination. This segmentation allows the system to optimize detection time by only performing the second, more time-consuming scan when actually needed.
2Power
If high power is transmitted before detecting the object to be charged, then power transmission efficiency is improved, but harmful effects on human body increase
Solution Approach 1:
The system performs preliminary detection in a first direction to identify the presence and location of electronic devices before initiating high-power transmission. This ensures that power is only transmitted when needed and directs the transmission accurately toward the target, improving efficiency while minimizing harmful exposure to surrounding areas.
Solution Approach 2:
The power transmission is directed specifically toward the detected electronic device location rather than being omnidirectional. This localized transmission improves power transfer efficiency to the target while reducing harmful effects on the human body and surrounding environment.
3Measurement precision
If multiple directions are scanned to locate the terminal, then location accuracy is improved, but the response speed decreases
Solution Approach 1:
The system performs a quick preliminary scan in a first direction to determine if a terminal is present, providing rapid initial response. If a terminal is detected, a more accurate second scan is performed in a second direction. This two-stage approach maintains high response speed while ensuring location accuracy when needed.
Solution Approach 2:
The scanning strategy is made dynamic by adjusting the detection process based on initial findings. The system adapts by performing only the necessary second-direction scan when a device is actually detected, rather than always performing both scans, thus optimizing the balance between response speed and location accuracy.
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
This solution enables rapid and accurate determination of electronic device locations, allowing for efficient wireless charging without the need for prolonged detection times, ensuring safe and effective power transfer even when devices are in motion or worn by users.
Implementation Method 1
The electromagnetic wave scheme has advantages in long-distance power transmission compared to the other schemes
Implementation Method 2
receive a reflected wave formed by the reflection of the transmission wave
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A wireless power transmitting device is provided. The wireless power transmitting device includes a patch antenna, and a transmission/reception processing circuit configured to output a first signal to the patch antenna during a first period, and process a second signal output from the patch antenna during a second period, wherein the patch antenna is configured to transmit a transmission wave using the first signal, and output the second signal to the transmission/reception processing circuit using a reception wave.