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Stephen Copeland, Xau Moua, Joseph Lane, Robert Akerson Client: Doug Taylor, John Deere Renewables Advisors: Dr. Manimaran Govindarasu, Dr.Venkataramana.

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Presentation on theme: "Stephen Copeland, Xau Moua, Joseph Lane, Robert Akerson Client: Doug Taylor, John Deere Renewables Advisors: Dr. Manimaran Govindarasu, Dr.Venkataramana."— Presentation transcript:

1 Stephen Copeland, Xau Moua, Joseph Lane, Robert Akerson Client: Doug Taylor, John Deere Renewables Advisors: Dr. Manimaran Govindarasu, Dr.Venkataramana Ajjarapu

2  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 Signal Converter

4 Microcontroller Arduino Runs programmed code to send and receive data on mesh network Wireless Shield Xbee Provides easy form of adapter from transceiver to arduino due to header misalignment.

5 Transceiver Xbee-PRO digimesh 900 Provides mesh protocol Transmits data to other node Antenna 7" ½ wave dipole, bulkhead mount, RPSMA connector Omni-directional transmission of data

6 Wind Vane NRG#200P Provides wind direction Angle from North=(360’/Vin)*Vout Vout ranging from 0 to Vin Anemometer NRG#40C Provides wind speed Generates a sine wave whose frequency determines wind speed

7 Used to transform the Sine wave output from the Anemometer into a square wave which provides the arduino with a frequency that represents the measured wind speed.


9  Scout Tower Code  Reads the Voltage Signal at selected pins of the Arduino  Aggregates data at a user specified interval Anemometer Output Signal Measures Pulse Width Converts Pulse Width to Wind Speed Sends Wind Speed to Serial Port

10  Central transceiver code  Receives data from all other nodes in the mesh network  Aggregates all of the data  Prints new data set to a text file Reads Signal From Transceivers Sends Data To Computer Averages Wind Speed Data

11  Sensor Testing  PCB Functionality Testing  Range Evaluations ◦ Elevated testing locations north of Ames  Power consumption ◦ Use of multi meters to measure current and voltage levels  Microcontroller ◦ Basic data communication

12  Self Healing ◦ Selected modules turned off during transmission  Security ◦ Encryption of data being transmitted  Latency ◦ Receiving rate vs. data size  Casing ◦ Shock, vibration, realistic impact, and contact with water, ice, and snow.

13  We connected the anemometer directly to an oscilloscope  Signal amplitude and frequency increases as wind speed increases

14  We connected the wind vane to 5V power supply  Oscilloscope gives output voltage over time  Voltage varies as wind vane changes direction from 0 to 360 degrees

15  Able to obtain a sine wave from the anemometer  Outputs a square wave with a frequency relative to the actual wind speed

16  Wind speed in mph  Top node 1  Middle node 2  Both sampled and averaged every 10 seconds  Bottom average of node 1 and 2 calculated every 10 seconds

17  Successful interfacing to the sensors and PCB for gathering of data  Aggregation of data from sensors  Storage of data as MPH in a text file from output

18  Found optimal frequency of our antennas to be marker 1  Freq= 896.247MHz marker 1 freq=896.2473 MHz dB(S(1,1))=13.97 marker 2 freq=1.8014 GHz dB(S(1,1))=13.66

19  We attached sensors to the roof of Coover Hall.  Successful transmission of data to motors lab from two nodes on roof  Simulated rugged terrain at Veenker golf course north of campus  Achieved an approximate range of 0.8 Km between nodes.

20  Tested North of Ames on a flat gravel road  Achieved an approximate range of 1.75Km

21  We spliced the USB cable between the device and PC  Connected inner USB wiring to a multi meter  Through the use of P=I*V we determined the required power to be around 0.5 Watts

22  Placement of four nodes at a certain distance preventing direct communication between first and last node  Upon the removal of a middle node from the system the line of communication is not broken Receiving Node Node 1 Node 3 Node 2 User

23  128-bit encryption is incorporated in the protocol for the transceivers  Client required only verification of encryption setting in transceivers

24  Node 1 sends current time to node 2  Node 2 computes difference from it’s current time Time Synchronized Node 1Node 2

25 2 nodes3 nodes4 nodes 2.9ms5.4ms7.1ms

26  Remained water tight under running water  Absorbed force from hammer without damage to the inner components  Withstood 6℉ without damage

27  Consists of sections of PVC and Brass connectors to ensure stability for the sensors  Nema-4 enclosure  Clamped to vent pipes on the roof of Coover Hall




31  Utilizes aggregated wind speed from the roof of Coover  USB interface with transceiver and Desktop PC  Uses Labview Software to run motor  Motor is coupled to a wind turbine which simulates wind power generation.


33  Use of renewable energy power source (wind or solar)  Integration of CFD into calculations for Wind Turbine project  Addition of more sensors to device ◦ GPS units ◦ Temperature Sensors ◦ Barometers This would allow for better analysis of potential wind generation locations

34  Leland Harker, ISU Parts Shop  Senior Design Team SD MAY11-01  Doug Taylor, John Deere  Brad Luhrs & Bryan Burkhardt, DMACC  Dr. Manimaran Govindarasu  Dr. Venkataramana Ajjarapu

35 Any Questions?

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