MoteAWatt for Demand Response

1
Mote-A-Watt for Demand Response

• John Cheng, Mike Koplow
• Andrew Redfern, Paul Wright

2
Overview

• Vision
• How it works
• Design
• Testing Results
• Problems
• Next steps

3
Vision

• Develop a low-power, low-cost energy monitor
• Wireless data transfer capability
• Draw power from mains, not battery (no
  maintenance)

4
Current Sensing
Power current voltage
Amperes Law
5
Current Sensing

• Galvanometer/ammeter
• Have to break circuit

• Clamp Ammeter
• Expensive
• Have to split wires
• For lab/industrial purpose

• Current Transducer
• Expensive
• Bulky

6
Overall Structure
7
Mote-A-Watt Design

• Components Used
• Allegro Current Sensor
• Supertex Switching Regulator
• TelosB mote

8
Mote-A-Watt Design
9
Slug Server

• Designed by Linksys
• 2 USB 2.0 ports
• 1GB flash drive
• TelosB mote (TOS_BASE)
• Unix system
• 10/100 Ethernet

10
Testing Results
Lights in test
Mote-a-watt
11
Testing Results

• Results based off of multiple light setup
• 1-2 Amps/light
• Measured against industry standard clamp-ammeter.

12
Problems

• Choosing a design
• Difficulty in taking raw data (oscilloscope)

13
Future Steps

• Finishing up Slug work.
• Incorporate with Surge Protector.
• Replace outlets
• Actuation

14
Questions