design modeling and capacity planning for micro solar power sensor networks
Download
Skip this Video
Download Presentation
Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks

Loading in 2 Seconds...

play fullscreen
1 / 27

Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks - PowerPoint PPT Presentation


  • 134 Views
  • Uploaded on

Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks. Jay Taneja , JaeinJeong , and David Culler Computer Science Division, UC Berkeley IPSN/SPOTS 2008 Presenter: SY. Outline. Introduction Micro-Solar Planning Model And System Design Node And Network Design

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks' - demi


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
design modeling and capacity planning for micro solar power sensor networks

Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks

Jay Taneja, JaeinJeong, and David Culler

Computer Science Division, UC Berkeley

IPSN/SPOTS 2008

Presenter: SY

outline
Outline
  • Introduction
  • Micro-Solar Planning Model And System Design
  • Node And Network Design
  • Evaluation
  • Conclusion
motivation
Motivation
  • They have a project – HydroWatch
    • Study hydrological cycles in forest watersheds
    • Sense temperature, humidity, and light
    • Forest environment
  • Want to design a device
    • Sense and transfer data
    • Solar powered
      • Infinite power lifetime
about this paper
About This Paper
  • Show how they develop the micro-solar power subsystem -- systematically
    • Modeling
    • Design
    • Evaluation
  • System design experience sharing
  • Real deployment evaluation
the challenges
The Challenges
  • Capacity Planning
    • Infinite power lifetime
  • Mechanical Design
    • Weatherproof with Correctly Exposed Sensors
  • Incorporating off-the-shelf and custom-built pieces
outline1
Outline
  • Introduction
  • Micro-Solar Planning Model And System Design
  • Node And Network Design
  • Evaluation
  • Conclusion
micro solar planning model

72:1

Micro-Solar Planning Model

Storage Charge-Discharge

1:1

E in : E out

All Ideal Components

48:1

240:1

120:1

Regulator Efficiencies

Half Hour of Exposure Per Day

60%

50%

2%

66%

application load
Application Load
  • Starting point for capacity planning
  • Most time is spent sleeping (~20 uA) with short active periods (~20 mA)
energy storage
Energy Storage

Straightforward charging logic

solar panel
Solar Panel
  • Solar cells composition
    • In serial and parallel
  • The panel characterized by its IV curve
    • Open-circuit voltage, short-circuit current, and maximum power point
solar panel1
Solar Panel
  • Important parameters
    • IV and PV Curves
    • Physical Dimensions

MPP: 3.11 Volts

They choose – Silicon Solar #16530(4V-100mA)

regulators
Regulators
  • Regulators are “glue” matching primary components
  • 50-70% efficiency for typical sensornet load range
  • Input regulator
    • Regulates voltage from solar panel to battery
    • Can be obviated by matching panel directly to storage
  • Output Regulator
    • Regulates mote voltage
    • Provides stability for sensor readings

Model estimates that load requires 28 minutes of sunlight

outline2
Outline
  • Introduction
  • Micro-Solar Planning Model And System Design
  • Node And Network Design
  • Evaluation
  • Conclusion
mechanical considerations
Mechanical Considerations
  • Enclosure design is often application-driven
    • Sensor exposure
    • Waterproofing
    • Ease-of-Deployment
    • RF in forest
    • Internal mechanicals

Temp / RH Sensor

TSR, PAR Sensors

network architecture
Network Architecture

Used Arch Rock Primer Pack for multi-hop network stack, database for stored readings, and web-based network health diagnosis

outline3
Outline
  • Introduction
  • Micro-Solar Planning Model And System Design
  • Node And Network Design
  • Evaluation
  • Conclusion
the urban neighborhood
The Urban Neighborhood
  • 20 Nodes for 5 Days
  • Mounted on house, around trees, and on roof
  • Meant to emulate forest floor conditions
  • Important for systematic approach -- provided validation of model
urban neighborhood energy harvested
Urban Neighborhood Energy Harvested

Every node received enough sunlight

the forest watershed
The Forest Watershed
  • 19 Nodes for over a Month
  • Mounted on 4-ft stakes throughout the area
forest watershed energy harvested
Forest Watershed Energy Harvested

Watershed

Most nodes struggle to harvest sunlight

reflected light
Reflected Light

Sunny

Overcast

Overcast

Sunny

Though only minimally, a cloudy day helps a sun-starved node harvest solar energy.

conclusion
Conclusion
  • Always surprises in real environment
  • Reliability is important real application
    • But difficult to achieve
  • In their work
    • Systematic approach resulted in 97% collection of an unprecedented spatiotemporal data set
    • System design experience sharing
ad