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Ridgeline Meteorological Sensor Network

Ridgeline Meteorological Sensor Network. Stephen Copeland, Xau Moua, Joseph Lane Client: Doug Taylor, John Deere Renewables Advisors: Dr. Manimaran Govindarasu, Dr.Venkataramana Ajjarapu. Problem Statement.

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Ridgeline Meteorological Sensor Network

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  1. Ridgeline Meteorological Sensor Network Stephen Copeland, Xau Moua, Joseph Lane Client: Doug Taylor, John Deere Renewables Advisors: Dr. Manimaran Govindarasu, Dr.Venkataramana Ajjarapu

  2. Problem Statement • Small scout towers capable of wirelessly transmitting measurements to large MET towers. • Wireless communication via radio transceivers on scout tower and MET tower. • Built-in mesh networking protocol

  3. System Block Diagram

  4. Functional Requirements • The range of the transceiver must be minimum 2km • Network shall use mesh network protocol • Data shall be sent home once a day • Data logged on tower’s own memory • All components housed in a NEMA4 enclosure

  5. Non-Functional Requirements • Network shall be self healing • Wireless signal shall penetrate rough terrain • Wireless signal shall withstand various precipitation • Transceiver shall be plug and play

  6. Transceiver Considerations

  7. Antenna Considerations • ½ Wave Dipole Antenna • Approx 2.1 db gain • Omni-directional • Yagi Antenna Array • Approx 10 db gain • Single directional Radiation Patterns

  8. Microcontroller Considerations

  9. Market Survey • Current use of cell towers or satellite communication • M4 Wind Services for Rotor Redline

  10. Constraints • Terrain can attenuate wireless signal • Topology could create bottlenecks in network • Climate could stress the operability of components • Limited access to information

  11. Risks & Mitigation

  12. Project Schedule • Milestones • 4/17 – Ordered technology components • 4/23 – Finalized design report • 4/25 – Completed initial testing (devices functioning) • 9/27 – Completed all primary performance study testing • 10/22 – Completed secondary testing (interface w/ data logger) • 11/26 – Completed final testing (field & performance)

  13. Cost Estimate (for one device)

  14. Transceiver Solution XBee-PRO DigiMesh 900 Transceiver

  15. Antenna Solution • 7" ½ wave dipole, bulkhead mount, RPSMA connector • Approx 2.1 dB gain • Up to 3 km RF LOS range • Inexpensive • Omni-directional

  16. Microcontroller Solution

  17. Testing • Range • various locations on campus • Power consumption • Use of LabView and multi meters to measure current and voltage levels • Microcontroller • Basic data communication • Message integrity • Throughput

  18. Testing (cont.) • Self Healing • Selected modules turned off during transmission • Security • Channel hopping, Encryption • Latency • Receiving rate vs. data size • Casing • Shock, vibration, realistic impact, and contact with water, ice, and snow.

  19. Prototype Implementation • Microcontroller and transceiver connected and programmed for basic communication • Computers used as data logger interface • Omni directional antenna connected to transceiver • 4xAA battery pack connected as power supply

  20. Results • Wireless communication up to 0.5 Km outdoors in line of sight. • Indoor testing in Coover too many obstacles • Drop-in networking

  21. Current Status • Transceivers and antennas received • Documentation Finalized • Proposal for acquisition of used sensors • Initial communication testing • More unit and system level testing is required

  22. Tasks & Contributions • Joe • Transceiver testing • Microcontroller testing • Hardware assembly • Research & Documentation • Xau • Antenna analysis • Hardware assembly • Research & Documentation • Stephen • Weekly reports • Hardware assembly • System level testing • Research & Documentation

  23. Senior Design II Plans • Parts provided by John Deere and others • If provided, system level testing • Extensive testing throughout summer ‘10 • Simulated or actual data logger integration

  24. Thank You Any Questions?

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