Contactless Power Supply Antenna Segmentation for Communication Reliability

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Solution Overview

Problem

Existing contactless power supply systems face challenges in maintaining high-speed wireless communication due to the influence of power supply on proximity wireless communication, leading to potential difficulties in establishing reliable communication.

Innovation Solution

A power supply device with separate communication and power supply antennas, along with control units for alternating sharing and authentication processing, ensures that power supply only begins after successful communication establishment, preventing interference and ensuring efficient power transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If power supply is performed during close proximity wireless communication, then power transfer efficiency is improved, but communication reliability deteriorates due to interference

Engineering Contradiction:

Improvepower transfer efficiencyVSAvoidcommunication reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent divides the wireless communication function into two separate systems: a first wireless communication system for initial connection and parameter sharing, and a second wireless communication system for high-speed data transfer. This segmentation allows the first system to operate independently during the connection phase, avoiding interference from power supply operations, while the second system operates during power supply when high-speed communication is needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary communication actions through the first wireless communication system before initiating power supply. The connection establishment, authentication, and parameter sharing are completed in advance through this first system, ensuring that communication reliability is maintained during the power supply phase when the second system takes over for high-speed operations.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If power supply and communication are performed simultaneously, then processing speed is improved, but communication accuracy deteriorates

Engineering Contradiction:

Improveprocessing speedVSAvoidcommunication accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent segments the communication process into two distinct phases using separate wireless communication systems. The first system handles accuracy-critical operations (connection establishment, authentication, parameter sharing) before power supply begins. The second system handles speed-critical operations (high-speed data transfer) during power supply, when accuracy requirements are reduced but throughput requirements increase.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic switching between different communication modes. The first wireless communication system operates during the initial connection phase, then the system transitions to the second wireless communication system for high-speed operations during power supply. This periodic action allows the system to optimize for accuracy when needed and for speed when power supply is active.

Inventive Principle:

Principle #19Periodic action

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 reliable high-speed wireless communication by isolating power supply operations from communication processes, ensuring stable power transfer and efficient communication in contactless power supply systems.

Implementation Method 1

a power supply antenna for power supply to the power receiving device

Methodology Applied

Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Implementation Method 2

a first communication antenna for communication with the power receiving device, a second communication antenna for communication with the power receiving device

Methodology Applied

Scientific EffectElectromagnetic Radiation:

Data Source

PatentUS10284026B2Power supply device that supplies power to power receiving device in contactless manner, method of controlling power supply device, and storage medium

Publication Date: 2019.05.07 CANON KK

AI summary

A power supply device includes a first communication antenna, a second communication antenna, a power supply antenna for power supply to a power receiving device, a communication control unit to control sharing processing via the first communication antenna and establishment processing of establishing the communication via the second communication antenna with the power receiving device with information shared by the sharing processing, a power supply control unit to control authentication processing for the power supply to the power receiving device and power supply processing of performing the power supply to the power receiving device authenticated by the authentication processing, and a control unit configured to control the sharing processing and the authentication processing to be performed alternately, wherein, in a case where the power supply processing starts before completion of the establishment processing, the power supply stops and the sharing processing is performed again.