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    569 569 Presentation Transcript

    • WISENET Wireless Sensor Network BY G.JANAREDDY 08Q61A0569 IV CSE
    • Overview
      • Introduction
      • Design Goals
      • Design Methodology
      • Subsystems
      • Project Success
      • Future Extensions / Projects
      • Applications
      • Conclusion
    • Introduction
      • Wireless Sensor Networks
        • One of MIT's 10 emerging technologies
        • Low-power systems
        • New applications: sensing, controls, automation
      • WISENET: Wireless Sensor Network
        • Office environment monitoring
          • Temperature, humidity, light
        • Quantitively evaluate heating & A/C systems
        • Funding & support provided by Honeywell, Int'l.
    • HISTORY:
      • The technological drive for smaller devices using
      • less power with greater functionality has created
      • new potential applications in the sensor and data acquisition
      • sectors.
      • MIT even recognized wireless sensor networks and TinyOS
      • as one of the ten emerging technologies that will change
      • the future (Technology Review, 1 February 2003).
      • “ Wireless Sensor Networks for Habitat Monitoring”
    • Design Goals
      • Use of Commercial-Off-The-Shelf (COTS) software & standard interfaces where applicable
        • Apache web-server (HTTP)
        • MySQL database
        • PHP web programming language
      • Simple, web-based user interface
      • Battery-powered, wireless sensor nodes: 'motes'
      • Low-power consumption = Long battery life
      • Motes create self-organizing ('ad-hoc') networks for robust communications
    • Design Methodology
      • Top-Down Design Process:
        • Define major subsystems
        • Define subsystem interfaces
      • Primary Subsystems:
        • Client
          • Standard Web browser via Internet
        • Server
        • Wireless mote network
    • System Block Diagram
    • Subsystem – Server
    • WiseDB
      • Written in C++
        • Utilizes open-source APIs
          • Application Programming Interfaces (API)
          • MySQL++ database API
          • Serial API
      • Relays information from mote network to database
      • Sends commands to mote network
        • Written in PHP4
        • Utilizes Charting Software: ChartDirector v3.0
        • Generates 3 Graphs (default)
        • Passes Parameters via HTTP GET
          • Use bookmarks for specific queries
        • Retrieves Data for Specific Mote or All Motes
      Web Program
    • Data Retrieval Form: Web Program
    • Generated Graphs: Web Program
    • Subsystem – Sensor Network
    • Block Diagram – Mote
    • Picture – Mote
    • Picture – Mote
    • Picture – Mote
    • TinyOS
      • Real-time operating system for microcontrollers
      • Open-source project at UC Berkeley
      • Key Features:
        • Developed for sensing applications
        • Emphasis on low-power: Idle & sleep modes
        • Highly modular architecture
        • Efficient utilization of resources
      • Currently developed for Atmega microcontrollers
    • TinyOS
        • Wisenet is partially operational
          • 2 Motes w/ prototype sensor boards
          • TinyOS modified for CC1010
          • Server running WiseDB + web interface
          • Sensor boards are not currently powered by batteries.
            • Problems with DC-DC converter
        • Unable to test multi-hop routing due to lack of motes
      Project Success
        • Expand network to develop & test multi-hop routing
        • Develop a single-board mote
          • Create a expandable, plug-in sensor interface
        • Research alternative energy sources
          • Solar cell, rechargeable batteries
        • Continue development of TinyOS
          • Improve tools
          • Optimize performance / reduce power usage
        • Improve web interface
          • Data analysis
      Future Projects / Extensions
        • Lab / Office Monitoring
        • Natural Habitat Monitoring
        • Automation / Process Control
          • Where wired sensors are impractical
        • Security Systems
          • Intrusion detection & occupancy sensors
        • Extreme Weather Surveillance
          • Think “Twister”
        • Potential Biomedical Applications
          • Critical fall alert for the elderly
        • Military Reconnaissance
          • Monitor battlefields, sensitive locations
      Potential Applications
    • ADVANTAGES:
      • The following bullet-points show the benefits of using Wisenet
      • against traditional methods.
      • Typically ¾ the cost of a walkthrough.
      • Can monitor offices over 24 hours.
      • Captures true maximum and minimum occupancy figures.
      • Installed at weekends – no staff disruption.
      • Utilization figures viewable the very next day over portal.
    • Conclusion
        • WISENET: Wireless Sensor Network
        • Emerging technology that will change the world
        • Many real-world applications
        • Low-power
        • Open-source software
        • Modular mote application design (TinyOS)
        • Flexible server implementation
        • Simple user interface via the web
      • WISENET is a step to the future of
      • wireless sensing technology.
    • REFERENCES:
      • Atkinson. MySQL++: A C++ API for MySQL, vers 1.7.9 ,
      • online posting . 12 Dec 2002.
      • <http://www.mysql.com/downloads/api-mysql++.html>.
      • 2. Gay, Levis, et al. The nesC Language: A Holistic Approach to
      • Network Embedded Systems ,
      • online posting.
      • To appear in Proceedings of Programming Language Design and
      • Implementation
      • (PLDI <http://today.cs.berkeley.edu/tos/papers/nesc.pdf>.
    • Questions?
    • THANK YOU