Qpower: Home Energy Monitoring System using Inductively Harvested Wireless Power

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24 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

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Qpower: Home Energy Monitoring System using
Inductively Harvested Wireless Power

Abstract

The

Qpower

system

uses

wirelessly

harvested

energy

from

circuit

breaker

boxes

to

monitor

home

energy

usage
.

The

goal

is

to

change

the

user’s

energy

consumption

behavior

by

providing

them

with

real
-
time

update

on

their

household

consumption
.

The

system

requires

zero

maintenance

once

installed
.

Our

project

focuses

on

research

and

development

of

the

Qpower

system

and

to

prepare

it

to

be

presented

at

the

UW

Environmental

Innovation

Challenge

in

March

2012
.


How it works

Proposed System

Kyle Nakano, Nomin Oyun, Long Thai, Genevieve Vigil

Future Technology

Intro

Our

proposed

system

will

be

composed

of

an

energy

harvesting

and

power

storage

element

which

will

deliver

power

to

a

microcontroller
.

This

device

will

upload

periodic

updates

of

the

home

energy

consumption

to

the

Google

power

meter,

which

can

be

accessed

from

any

internet

capable

device
.

UW: Leader in Sustainable Technology

We

intend

to

present

our

system,

Qpower,

at

the

UW

Environmental

Innovation

Challenge

which

will

allow

us

the

opportunity

to

expose

our

system

to

a

broader

audience
.


The

same

technology

that

drives

the

Qpower

system

can

be

applied

to

future

wireless

power

technology
.

Wireless

power

technology

offers

the

promise

of

cutting

the

last

cord,

allowing

users

to

seamlessly

recharge

mobile

devices

as

easily

as

data

is

transmitted

through

the

air
.

UW Environmental Innovation Challenge

Future Work

These

days,

everyone

wants

to

save

energy
.

One

way

is

to

promote

conscious

power

consumption

in

their

homes
.

There

already

exists

system

which

lets

users

monitor

their

power

usage,

however

they

are

constrained

by

battery

life

and

difficult

user

interfaces
.






A

home

energy

monitoring

system

utilizing

inductively

harvested

wireless

power


Present

at

University

of

Washington

Environmental

Innovation

Challenge






Battery

free


Promotes

power

economy


Motivation

We Propose
Qpower
:

Fig
.
2

The

proposed

Qpower

design

in

which

the

inductive

harvester

gathers

energy

to

power

the

MCU

which

transmits

data

to

PC

Fig
.

3

Comparison

between

actual

power

usage

and

projected

power

usages

in

monitored

households

0
200
400
600
800
1000
1200
Jan
Feb
March
April
May
June
July
Aug
Sept
Oct
Nov
Dec
Average Electrical Power Usage (kWh)

Month of 2009

Energy Savings for Monitored Homes

Actual Usage
Predicted Usage
Fig. 1 Example analysis of home electricity use with an energy
monitoring system

The

Pacific

North

West

is

at

the

forefront

of

sustainability

and

technological

advances

as

well
.

This

resonates

in

the

UW

innovation

community

and

Qpower

is

the

epitome

of

a

product

that

embodies

both

spirits

of

sustainability

and

technological

innovation
.

When

current

travels

through

a

conductor,

such

as

a

power

line

going

into

a

house,

an

electromagnetic

field

is

induced

around

the

wire

by

the

right
-
hand

rule
.

Most

households

are

supplied

by

AC

power,

ergo

any

power

line

carrying

current

into

a

household

will

have

an

oscillating

magnetic

field

around

it
.

An inductor placed
close to the
conductor can start
to induce
alternating current.
Using this
alternating current,
we can use power
electronics to
power the rest of
the system.

Fig
.
4

Magnetic

Field

is

induced

as

current

travels

through

a

conductor


Fig
.
5

Alternating

current

is

induced

by

inductive
-
coupling

University of Washington