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PDR 2012 – Team Gong Self Sustaining Sensor System s4

PDR 2012 – Team Gong Self Sustaining Sensor System s4. Presentation by: Andrew Frieden Matthew Weydt Nick Setzer Tyler Dunn. Presentation Outline. Problem Solution System Level Requirements Software Component Requirements & Functional Flow Diagram

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PDR 2012 – Team Gong Self Sustaining Sensor System s4

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  1. PDR 2012 – Team GongSelf Sustaining Sensor Systems4 Presentation by: Andrew Frieden Matthew Weydt Nick Setzer Tyler Dunn

  2. Presentation Outline • Problem • Solution • System Level Requirements • Software Component Requirements & Functional Flow Diagram • Hardware Component Requirements & Functional Flow Diagram • Power Consumption • Sample Frequency • Microcontroller

  3. Presentation Outline continued • Transmitter • Server • Data Processing • Budget • Deliverables

  4. Problem Being Addressed • Land degradation • Depletion of soil nutrients • Inappropriate irrigation • Over fertilization • Other land pollutants • Water pollutants • Acid rain from human introduced toxins • Oxygen Depletion • Pathogens • Other environmental issues

  5. Solution • Modular, robust device to report on current status of environment around it • Compatible with two environments: Water and Soil • Completely autonomous for convenience of end user

  6. System Level Requirements • The device shall be able to sense and collect data from two types of environments: water and soil • The device shall be completely autonomously powered and operated • The device shall be able to communicate autonomously to a server via GPRS • The device shall be supported by an android software application • The software shall be able to display a graphical representation of the sensor data

  7. Software Component Requirements • Android application shall be able to post and receive data to and from a database • Application shall be able to format and present data from a database in a graphical user interface • Web service shall be able to provide communication between the device and the server

  8. Software Component: Functional Flow Diagram MySQL Database Android Application Http Post SIM Card /GPRS Module GPRS Web Service

  9. Hardware Component Requirements • The energy harvester shall be able to fully charge a battery at least 3 seasons of the year • The battery shall be able to power the microcontroller, sensor device and on board transmitter • The sensor shall be able to regularly take accurate readings of its current environment and transmit them to the microprocessor • The data shall be able to traverse from on board memory to an on board transmitter in increments of no more than 1400 bytes

  10. Hardware Component: Functional Flow Diagram

  11. Power Consumption • Solar Panel supplies a maximum of 1.8 Watts at 125 mAh • 2000mAh capacity battery will take 16 -20 hours to fully charge • Typical operation, 500mAh will be drawn • 4 hours continuous use • When powered on for 12 minutes: • 5% of the battery is discharged • 48-60 minutes to recharge back to full • ~72 minute cycles • Operates for 24 hours without charging

  12. Sample Frequency • Minimum of 72 minute sample cycles using best case operating power, and sending after every sample • Will be at least once every 2 hours • Results in 20 samples in 40 hours without recharging • Reduced transmit rate • Delay sending until several samples have been taken • Will increase how often a sample can be taken

  13. Gecko micro controller • Ultra low power • 1 to 16 MHz configurable clock rate • 200µA per MHz when running • 1.6mA @ 8 Mhz • 1250 continuous operating hours with 2000mAh battery • 45µA per MHz Sleep Mode • 5µA Deep Sleep Mode • 32Kb Flash memory • UART / SPI interface • GPIO Pins

  14. Transmitter • GPRS (General Packet Radio Service) • GSM/GPRS 850/900/1800/1900MHz • Performance for voice, SMS, Data, and Fax • Low power consumption: 1.5mA(sleep mode) • Operation temperature: -40°C to +85 °C

  15. Transmitter Continued • Transmit using GPRS (Mobile Internet) • 1460 byte package sizes • UART interface to Microcontroller • Use web methods for posting data to MySQL database

  16. Server • MySql/Sql Server • $4-$10/mo • Bandwidth: 1-unlimited GB • Web Space: 80-unlimited GB • Datacenter Locations: • Columbus, Ohio • Chicago, Illinois

  17. Budget

  18. Deliverables: MDR Fall 2011 • Sensor / Micro controller communicating • Power Supply charging battery • Server and software communication • System integration to be completed next semester

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