Presentation is loading. Please wait.

Presentation is loading. Please wait.

Team 2 AFRL WSN Health Diagnostic.  What is energy harvesting?  The process by which energy is derived from external sources  Why use energy harvesting?

Similar presentations


Presentation on theme: "Team 2 AFRL WSN Health Diagnostic.  What is energy harvesting?  The process by which energy is derived from external sources  Why use energy harvesting?"— Presentation transcript:

1 Team 2 AFRL WSN Health Diagnostic

2  What is energy harvesting?  The process by which energy is derived from external sources  Why use energy harvesting?  Renewable source  Allows for remote charging in applications

3  Energy harvesters provide a very small amount of power for low-energy electronics  The energy source for energy harvesters is present as ambient background and is free  As opposed to large-scale energy generation which costs money

4  Converted energy can be stored in a capacitor for short-term use or a battery for long-term use.  Allows for the battery (or a charger) to be taken out of the equation of an application since it sources energy from the environment

5  Materials  Piezoelectric  Pyroelectric  Photovolatics  Other  Kinetic Energy  RF Energy

6  Converts mechanical strain to electric current  Produces power on the order of mW  Useful for small applications  Handheld devices  Light bulbs  Human Motion  Acoustic Noise  Vibrations  Pressure

7  Converts changes in temperatures to electric current  Stable for temperatures above 1200 ⁰ C  High thermodynamic efficiency  Used in  Power Plants  Automobiles

8  Converts human and/or natural motion into electric current  Found in  Wind Turbines  Ocean Wave Buoys  Human Motion

9  Also known as solar power  Converts solar radiation into DC  Found just about everywhere and gaining more popularity

10  Converts RF signal energy into DC power  RF energy is available in a wide array of frequency bands due to everyday technologies  Cell Phones  Radio Towers  WiFi Routers  Laptops  TV Signals  Only a tiny amount of power can be harvested, good for low power applications (Ex: A WiFi router can transmit mW)  Usually very short distance, however Powercast demonstrated energy harvesting at 1.5 miles

11  Our project uses RF power harvesting technologies

12  Ultra-low power, battery free applications  Perfect for wireless sensor networks

13  Intentional Sources  Powercast utilizes a direct RF energy source, dedicated to providing RF energy for harvesting  Anticipated Ambient Sources  Routers, cell phone transmitters  Unknown Ambient Sources  Microwave radio links, mobile radios

14  Module Components & Features  Powercast P2110 Powerharvester™ Receiver  MCU: Microchip PIC24 XLP  Radio module ▪Microchip MRF24 ( )  RF Powerharvester  System power: 3.3V  Capacitor ▪50mF (as low as 3300uF)  Discrete sensors: Temp, Humidity, Light  Wireless protocol: MiWi™ P2P

15

16  Center Frequency = 915MHz  Intentional RF Source  Directional Antenna

17

18

19

20  Optimized RF Powerharvesting for the transmitter frequency  RF Powerharvesting allows for remote placement of sensor nodes  Great performance due to a design that focuses on minimizing power consumption in each node  Proprietary wireless protocol

21  Power harvesting technologies are everywhere and efficiencies are vastly improving  Simply look at solar efficiencies  Most of the world’s energy in the future will be generated using power harvesting technologies


Download ppt "Team 2 AFRL WSN Health Diagnostic.  What is energy harvesting?  The process by which energy is derived from external sources  Why use energy harvesting?"

Similar presentations


Ads by Google