1. Team 1.1. Networked orientation sensor (optical) Sponsor: Freescale
Monica Arroyo
Beth Beaver
Edward Buhidar

2. PROJECT ASSIGNMENT
Create a networked orientation sensor for a Freescale wind turbine.
Has to give direction
Has to deliver this data to Thread system
Must be weather resistant
Cannot interfere with other internal components of turbine itself
1 Degree Resolution
Remote design to run off of a 3V coin cell battery for a year

3. BRAINSTORMING
1) A magnetometer attached to the fin to measure direction relative of North.
2) Use a quadrature optical encoder on the shaft to determine change in direction refined by a gyroscope
3) Gray code optical encoder refined by a gyroscope for absolute location
4) Color sensor encoder for precise absolute location

4. ADAFRUIT RGB COLOR SENSOR
Gives digital return of red, green, blue (RGB), and clear light sensing values.
An IR blocking filter, integrated on-chip and localized to the color sensing photodiodes
minimizes the IR spectral component of the incoming light and allows color measurements to be made accurately.

5. APPLICATION OF COLOR WHEEL WITH COLOR SENSOR
Issues:
Need to design and our own encoder disk
Need to design and fab a cuff to attach a standard PVC to the non-standard diameter of the base

6. IMPORTANCE OF PVC SLEEVE
Rotates about the shaft
Blocks light which could obscure our color readings
Helps to house hardware protecting them for the elements
Will have a hatch built in for accessibility to in devices housed inside

7. WORK BREAKDOWN STRUCTURE
Hardware
PVC Sleeve
Color Encoder
Color Wheel Encoder Disk
RGB Color Sensor with IR filter and White LED
Freedom Microprocessor
Software
Thread/Freescale Servers
Linux/mbed Compiler Coding

8. TIMELINE Brainstorm and determine solution to task 3/12/15
Reassessed solution, determined new solution was needed 4/13/15
Design new encoder 4/20/15
Code sensor to read color 4/27/15
Attach color wheel to turbine shaft 5/12/15
Test and verify data over summer 2015
Connect to thread and verify data 9/17/15
Trouble shoot and correct any potential issues 11/24/15
Be prepared to present 12/3/15

9. PROGRESS/DEMO
The color sensor is detecting color using the Freedom board and giving a digital return.
A cross-section has been created to view how the color wheel and PVC sleeve will be mounted to the shaft

10. MANUFACTURABLE AND ECONOMIC
Creating a fitting so standard PVC can be used.
Making the encoder disk reasonably thin and out of thermal polymer
All materials and devices are cheaply manufactured or widely available
Power all devices from the generator with batteries for back-up

11. ENVIROMENTAL AND SOCIAL IMPLICATIONS
Wind energy is:
Plentiful
Renewable
Produces no greenhouse gas emissions
Requires little land
Clean

12. BUDGET Quadrature Encoder Disk (thermoplastic)~$50/Kg Epoxy- $8.96
3V coin battery~$2
PVC sleeve - $5.19
Color Sensor~$8.00
Enclosure box - $80.89
Total = $155.04
Freedom and Tower boards
Provided by Freescale

13. REFRENCES
[1] Lubosny, Z., & Lubosny, Z. (2003). Wind turbine operation in electric power systems: advanced modeling. Heidelberg: Springer. [2] Freescale.com, 'Thread Networking Protocol Freescale', [Online]. Available: [Accessed: 04-May-2015]. [3] RGB Color Sensor with IR filter and White LED - TCS34725 [Online]. Available: [4] Freescale Semiconductor, Inc.(2015, Feb.). “FXAS21002C 3-Axis Digital Angular Rate Gyroscope” [Online]. Available: [April 25, 2015]. [5] ABS Filament for 3D Printers mm Diameter - Blue - 1KG ID: $46.00 : Adafruit Industries, Unique & fun DIY electronics and kits', Adafruit.com, [Online]. Available: products/2149?gclid=CKOs3feJp8UCFYWVfgodsZAAgw. [Accessed:04-May-2015].