Wireless Power Transmitter Signal Detection Interference Avoidance
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Solution Overview
Problem
Wireless power supply devices using electromagnetic waves often interfere with wireless communication systems operating on the same frequency band, leading to coexistence challenges.
Innovation Solution
A wireless power supply device equipped with a signal detector and processor circuitry that detects communication information from nearby wireless communication devices and adjusts power transmission periods to avoid interference, including determining wait times and continuous transmission periods based on detected communication activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless power supply device performs power transmission using electromagnetic waves of a specific frequency, then power transmission efficiency is improved, but interference to wireless communication systems using the same frequency band increases
Solution Approach 1:
The wireless power supply device performs power transmission in periodic intervals rather than continuously. The control unit determines a power transmission interval based on communication intervals detected by the signal detector, creating periodic power transmission cycles that avoid continuous interference with communication systems while maintaining effective power delivery when the communication channel is idle
Solution Approach 2:
The power transmission parameters are dynamically adjusted based on real-time detection of communication signals. The control unit modifies power transmission timing and duration according to the presence and characteristics of communication signals detected by the signal detector, enabling adaptive coexistence between power transmission and communication activities in the same frequency band
2Object-affected harmful factors
If the wireless power supply device waits for communication signals to stop before transmitting power, then interference to wireless communication is reduced, but power transmission time is lost
Solution Approach 1:
The signal detector continuously monitors the frequency band for communication signals and provides feedback to the control unit. Based on this feedback, the control unit dynamically adjusts power transmission timing, initiating power transmission only when communication signals are absent or below threshold levels, thereby optimizing both interference reduction and power transmission efficiency through closed-loop control
Solution Approach 2:
The device operates in the same frequency band for both communication and power transmission functions. By detecting communication signal patterns and adapting power transmission accordingly, the system achieves multi-functional operation in a single frequency band, eliminating the need for separate frequency allocations and maximizing spectrum utilization
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 solution enables the wireless power supply device to coexist with wireless communication systems by minimizing interference, allowing both to operate effectively within the same frequency band.
Implementation Method 1
a wireless power supply device performs power transmission using the electromagnetic waves of a specific frequency
Implementation Method 2
The signal detector is configured to detect communication information based on a wireless signal transmitted from at least one wireless communication apparatus
Data Source
AI summary
According to one embodiment, an electronic apparatus includes a signal detector and processor circuitry. The signal detector is configured to detect communication information based on a wireless signal. The processor circuitry is configured to determine at least one of (1) a first period to wait from a timing of when power transmission is ended to a timing of when power transmission is started, (2) a second period to wait from a timing of when the wireless signal is not detected to a timing of when power transmission is started, and (3) a third period for continuously performing power transmission. The processor circuitry is configured to transmit a power with electromagnetic wave according to at least one of the first period, the second period, and the third period.