Multidisciplinary Engineering Senior Design Stonehurst Regatta Race Project

Multidisciplinary Engineering Senior Design Stonehurst Regatta Race Project 05511 Sponsor: John Bowen Photon Gear Inc. Mentor: Mr. Garsin

Stonehurst Regatta Race Team • Douglas Carr (Team Leader) • Robert Magnant • Juan Gonzalez • Jeffrey Lisco • Jacob Johnson

Agenda • Background • Project Requirements & Specs • Concept Development • Feasibility • Final Design • Problems • Lessons Learned

Background • The Race – A collegiate regatta – Actually 2 races in 1 • How is the race timed now? – Seiko S 129 Printing Stopwatches • What are the problems with this method? – Not the timers themselves but… – Miscommunications & human errors in reporting the results over the phone

The Race Site

The Race Site

AM Race • 5000 meters • Endurance style “Head Race” • Aprox 15 -25 minutes PM Race • 1500 meters • All out “Sprint Race” • Aprox 4 -7 minutes

Race Results • Start and finish line Stopwatches are synced, creating a global race clock. • Boats crossing the start have their global time recorded, second time taken at finish. • At the Results Booth: t finish - t start = trace • tam + (3 * tpm) = ttotal

The Finish Line

Project Requirements & Specs

Needs Assessment • Major errors occur during data entry • Project should prevent timing errors from occurring in the future • Design must be able to survive in Rochester weather • Must be easy to use - volunteers • Appropriate documentation for future use • Current system preserved (backup) • $500 Budget

Specifications • Capture start and finish times without distorting 1/10 th a second accuracy • 1/10000 failure rate should not be jeapordized • System must handle multiple boats and the start finish line • Weather-proof • Operating Temperatures 15 to 100 °F • 10 hour minimum battery life

Specifications (Cont. ) • User feedback to verify functionality is desired. (“On” and “Sync” lights etc. ) • Wireless data transfer from collection sites to results booth.

Concept Development

Start Line Start Time Capture Record Transmit Results Booth Receive Transmit Finish Line Finish Time Capture Record Processing

Design Brainstorm • Microcontrollers on Each boat • Passive RFID tags on each boat • Stopwatch data outputted to a laptop • Embedded Real Time Clock Design

• RFID’s triggered by underwater emitter • Triggered tags emit coded boat number RFID Concept • Heard by antennae and recorded by a laptop • High part volume and cost make infeasible Qty Part # Description Price 1 P-7550 Control Module w/RS-232 $ 236. 84 1 P-7548 Remote Antenna RFM $ 248. 88 3 P-7549 Antenna Tuning Module $ 82. 01 $ 246. 03 1 P-7552 Multiplexer Module $ 162. 44 100 P-7039 Transponder 85 mm R/W $ 7. 19 $ 719. 00 Cable 500 ft $ 150. 00 Antennas $ 210. 81 $ 632. 43 1 3 P-7223 Total $2, 395. 62

Stopwatch Data Interface • Utilize “Data Output Jack” for electronic data capture • Problems upon inspection: – Proprietary, non-standard connector – Unknown output protocol • Alternative: – “Manual Trigger” jack, simple 2 pin connector – Requires only a short to trigger stop watch

Feasibility Assessment • Factors Considered: – Team has sufficient skills and resources – Cost within budget? – Two quarters sufficient time? – Ability to Complete and create a working unit – Ease of use by race volunteers

Feasibility Study

Final Design

Synthesis • Essentially 2 Stop Watches in parallel – Seiko SW Prints a data hardcopy – Senior’s SW records data electronically • Both SW triggered by one signal • Feedback to the user via LED’s • Data can be exported to external storage via FTP data transfer whenever appropriate

Hardware Flow • Button press triggers stopwatch and a PIC interrupt • PIC retrieves time from RTC, sends to CPU • LED’s indicate system functions

Timing System Flowchart

OOM Cost Analysis: Qty Part # Description Price Housing Milled plastic housing $ 25. 00 $ 50. 00 RS 232 plug $ 3. 00 $ 12. 00 External trigger $ 50. 00 $ 100. 00 2 Power Switch (toggle slide) $ 1. 00 $ 2. 00 2 Power LED (green) $ 1. 00 $ 2. 00 2 Synch LED (blue) $ 1. 00 $ 2. 00 2 Time LED (red) $ 1. 00 $ 2. 00 2 Synch momentary switch $ 1. 00 $ 2. 00 2 Trigger cable $ 2. 00 $ 4. 00 2 Trigger plug $ 0. 61 $ 1. 22 1 Synch cable $ 1. 00 2 4 2 Seiko Trigger 2 PIC 16 F 628 a Pic microcontroller $ 1. 71 $ 3. 42 2 DS 1391 Real time clock $ 1. 25 $ 2. 50 2 DS 232 RS 232 chip $ 3. 18 $ 6. 36 1 Printed circuit board $ 30. 00 2 RS 232 keypad (optional $ 70. 00 1 PIC programmer/Developer $ 200. 00 Crystal $ 1. 31 $ 2. 62 20 Resistors $ 0. 25 $ 5. 00 20 Capacitors $ 0. 25 $ 5. 00 2 5 V batteries $ 5. 00 $ 10. 00 2 CTX 416 -ND Total $ 30. 00 optional $ 443. 12

What will the end Product be?

Timing Device Layout

Program Flowchart

Software Application: GUI

Problems • Real Time Clock IC incompatible with PCB – Adapter necessary • PIC programmer incompatible – Old programmer, New PIC – Budget constraints prevent buying new programmer • RS 232 Data Transfer – How to properly capture?

Switch to Stamp Microcontroller • Stamp developers readily available • Equipment easily obtainable • Easily accessable functionality • Simple integration

Outcomes Desired • PCB and PIC implementation • Project completed before CDR • Keep to Budget vs Actual • Basic Stamp • Final integration will occur before June 1 st, 2005 • Project and modifications will still be under budget.

Lessons Learned • Clear definition of goals and specifications is critical. • Identify key parameters right away, such as budget. • Plan for the unexpected. • Have prototype hardware in hand as early as possible.

References • http: //pdfserv. maxim-ic. com/en/ds/DS 232 A. pdf • http: //pdfserv. maxim-ic. com/en/ds/DS 1390 -DS 1393. pdf • http: //ww 1. microchip. com/downloads/en/Device. Doc/40044 b. pdf • http: //www. designserver. rit. edu