1. Team members: Alex Woodard David Combs Shiqu Liu Collision Avoidance Based on TelosB

2. Outline I. Background II. Technology Components

3. Background From the opposite side, a person may be doing the same thing! When you go turn a corner, you may be distracted by your phone!

4. Person 1 Person 2 Background Corner

5. Background We need a device to warn us whether a person is coming from the opposite corner!

6. Technology Components 1.Sensing for a change in light from the shadow 2.Measuring the signal strength -- RSSI 3.Warning the pedestrians

7. Technology Roadmap  Detecting the shadow It’s easy to detect shadow Advantage Disadvantage The change of light may be not obvious The shadow may not project on the device

8. Technology Roadmap  Measuring the RSSI It’s widely used in indoor location, we can find with many previous studies Advantage It’s difficult to know when two people come from the same side Disadvantage

9. Person 1 Person 2 Proposed Setup Communication between devices Warning LED Shadow Detection

10. Questions?