Energy Management for Simultaneous Wireless Information and Power Transfer

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Solution Overview

Problem

The stability and reliability of simultaneous wireless information and energy transfer systems are compromised due to unstable power output from rectified wireless energy signals, leading to potential data loss and receiver power failure.

Innovation Solution

An energy management method and system that involves detecting incoming signals, activating a battery for power supply, processing and storing energy from the signals in a temporary storage unit, and then using this stored energy to charge the battery, ensuring a stable power supply to the receiver.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If wireless energy signals are rectified directly to supply power to the receiver, then power supply is achieved, but the power output is unstable due to time variation of wireless channel

Engineering Contradiction:

Improvepower supplyVSAvoidstability of power output

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies preliminary action by storing harvested energy in a temporary energy storage unit before supplying power to the receiver. This allows the system to accumulate energy in advance and smooth out fluctuations caused by time-varying wireless channels, ensuring stable power output even when input energy varies.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements beforehand cushioning by introducing a temporary energy storage unit that acts as a buffer between the rectified wireless energy and the receiver. This cushioning mechanism absorbs energy fluctuations and provides consistent power supply, preventing instability and data loss.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Reliability

If battery is activated to provide working power supply, then stable power is ensured, but battery throughput increases and standby time decreases

Engineering Contradiction:

Improvestable operationVSAvoidstandby time

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent applies continuity of useful action by continuously harvesting energy from wireless signals and storing it in the temporary energy storage unit. This continuous energy harvesting reduces reliance on the battery, extending standby time while maintaining stable operation through the combined power supply of battery and harvested energy.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The patent implements discarding and recovering by capturing and storing energy from wireless signals that would otherwise be wasted. This recovered energy is stored in the temporary energy storage unit and used to supplement battery power, reducing battery throughput and extending device standby time.

Inventive Principle:

Principle #34Discarding and recovering

3Loss of energy

If energy is harvested from wireless signals, then battery usage is reduced, but power output fluctuates due to signal time variation

Engineering Contradiction:

Improvebattery throughputVSAvoidpower output stability

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent applies preliminary action by storing harvested energy in advance in a temporary energy storage unit before it is needed. This allows the system to smooth out power fluctuations and provide stable output even when harvested energy varies due to signal time variation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a temporary energy storage unit as an intermediary between the harvested wireless energy and the receiver. This mediator buffers the fluctuations in harvested energy and delivers stable power to the receiver, combining the benefits of reduced battery usage with stable power output.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 approach stabilizes the operation of the receiver by managing energy storage and supply, overcoming issues of instantaneous power insufficiency and instability caused by time variations in wireless signals, thereby ensuring reliable operation and broader applicability of the system.

Implementation Method 1

If a wireless energy signal is rectified directly to supply power to a receiver

Methodology Applied

Scientific EffectRectification:

Implementation Method 2

storing the harvested energy into a temporary energy storage unit

Methodology Applied

Scientific EffectEnergy storage:

Implementation Method 3

activating a battery to provide working power supply for a receiving terminal

Methodology Applied

Scientific EffectBattery electrochemical conversion: Battery (electricity)

Data Source

PatentUS10630117B2Energy management method and system for receiving terminal of simultaneous information and energy transfer system

Publication Date: 2020.04.21 SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY

AI summary

An energy management method and system are provided for a receiving terminal of a simultaneous information and energy transfer system. The method comprises the steps of: activating a battery to provide a working power supply, receiving a simultaneous information and energy transfer signal, processing the signal and harvesting energy in the signal, storing the harvested energy into a temporary energy storage unit, and stopping the battery from supplying power, and charging the battery from the energy stored in the temporary energy storage unit. The system comprises a receiver and an energy management module.