Wireless Power Transmitter Signal Collision Avoidance

Solution Overview

Problem

In wireless power transfer systems, signal collisions between multiple electronic devices can occur when they respond simultaneously, leading to inefficient and unstable power transmission, as existing technologies lack effective methods to manage and avoid these collisions.

Innovation Solution

A wireless power transmitter and receiver system that allows a new device to analyze a response signal from a previously placed device and generate its own response signal at a collision-avoided time point, using a power conversion unit and power transmission control unit to manage the wireless power signal and avoid signal collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple wireless power receivers respond simultaneously to the wireless power transmitter, then the power transmission can serve multiple devices, but signal collisions occur leading to unstable and inefficient power transmission

Engineering Contradiction:

Improveability to serve multiple devicesVSAvoidstability of power transmission

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having the wireless power transmitter send a query signal before power transfer, allowing receivers to listen and detect existing communications. This enables receivers to determine appropriate response timing in advance, avoiding collisions while maintaining the ability to serve multiple devices simultaneously.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by enabling adaptive response timing where each wireless power receiver adjusts its response time based on detected signals from other receivers. This dynamic timing adjustment allows multiple devices to be served reliably without fixed collision-free protocols, improving both versatility and stability.

Inventive Principle:

Principle #15Dynamics

2Productivity

If multiple wireless power receivers respond simultaneously, then multiple devices can receive power, but the power transmission efficiency decreases due to signal collisions

Engineering Contradiction:

Improvenumber of devices servedVSAvoidpower transmission efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The system performs preliminary detection through query signals and listening modes before actual power transfer responses. This preliminary action enables receivers to identify optimal response moments, ensuring high-power transmission without collision-related energy loss while maintaining the capability to serve multiple devices.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses feedback mechanisms where receivers detect response signals from other devices and adjust their transmission timing accordingly. This feedback loop prevents energy-wasting collisions while maximizing the number of devices that can simultaneously receive power efficiently.

Inventive Principle:

Principle #23Feedback

3Speed

If a wireless power receiver responds immediately, then the response time is short, but signal collision with other receivers increases

Engineering Contradiction:

Improveresponse timeVSAvoidsignal collision avoidance

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary detection through query signals and listening modes before actual power transfer responses. This preliminary action enables receivers to identify optimal response moments, ensuring high-power transmission without collision-related energy loss while maintaining the capability to serve multiple devices.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by enabling adaptive response timing where each wireless power receiver adjusts its response time based on detected signals from other receivers. This dynamic timing adjustment allows multiple devices to be served reliably without fixed collision-free protocols, improving both versatility and stability.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10700530B2Method for avoiding signal collision in wireless power transfer

Publication Date: 2020.06.30 LG ELECTRONICS INC

AI summary

A wireless power transmitter, includes a power conversion unit configured to form a wireless power for power transmission; and a power transmission control unit configured to control the power conversion unit to detect a collision between a first packet generated by a first wireless power receiver and a second packet generated by a second wireless power receiver in a same time slot, and control the power conversion unit to transmit information indicating the collision to the first wireless power receiver and the second wireless power receiver.