In and Out Line Monitoring System for Volleyball Kelley White Advisor: Professor Buma

What problem will this project solve? Goals?:  A line judge determines if a ball lands in or outside the court  There is a need to ensure good calls and a fair game for players and coaches  Develop a system that can determine if a ball lands on the line

Specifications:  The prototype will be a 6 foot portion of the end line  Battery powered and rechargeable (able to last a 10 hour tournament day)  Green light indicating ball contact  Simple installation with overlying tape over existing line

Block Diagram Input from sensor microcontroller Indicator (LED)

Design: Sensors  9 force sensitive resistors (FSR’s)  Connected to microprocessor with thin wire

Design: Microprocessor Arduino- receives voltage signal from one or multiple of the FSR’s Output LED light at Arduino for ball contact and no light for foot contact

Testing  Initial testing with the force plate in Butterfield  Testing with FSR’s in electrical engineering labs  Final testing on court with Union College Volleyball team

Project Schedule:  Fall term: -Testing with FSR’s and adjust design if necessary -Finalize and order all parts -Detailed design description -Update web page -Final design report  Winter Term: - Algorithm development -Continued development with further testing -Final project complete with desired testing outcomes -Final project report

Questions?

Appendix Budget:

Thickness:  Basic scotch tape: mm  Wires: mm  FSR’s: 0.40 mm Max total thickness: = mm *will be negligible to players

FSR’s 1.75x1.5” $7.95.5” diameter $ ” diameter $5.95

Arduino MEGA 2560: 1. Pins: Need at least 11 input pins (9 with room) √ there are 16 input pins 2. Memory rate: Unneeded. Processing real time data to make the output decision. Not storing any outputs/inputs. √ 256KB 3. Sampling rate: 10 samples a second worked well for differentiating force, but 50 samples a second would ensure accuracy √ 16MHz 4. Battery life will need to be chosen after testing with the FSR’s and computing the maximum power dissipation in the lab Analog/digital MUX -9 input sensors for only 6 feet & need a way to look at all sensors if the project is expanded to the whole perimeter