System for Engine Location Of a Web Train Paul Wimmer and Adam Weintrop Dr. Irwin and Dr. Schertz 1/30/06

2 Outline Current position on time line Accomplishments of Fall Semester Goals for next week

3 Time Line

4 Outline Current position on time line Accomplishments of fall semester Goals for next week

5 Fall Semester Designed hardware to use the “2-bit” method Created DCC command program Took measurements Software flow charts Built 1 st hardware section for amplification

6 “2-bit” Method Because the software only needs to determine 3 train states 0 0 Train off track 1 0 Idle state 1 1 Train running

7 Differential Amplifier

8 Results SituationVoltage from DMM Train OFF, power on<8.2 mV Train OFF, power off<1.5 mV Train idle, off track11 mV Train idle, on track11.5 mV Train ON, power off20 mV Speed 1, train on track30 mV Speed 10, on track80 mV Speed 28, on track195 mV Train running off track11-12 mV

9 Idle / Off Additional gain is needed to help determine between idle and off track states Software will help determine these states

10 Outline Current position on time line Accomplishments of fall semester Goals for next week

11 Problems to Address for Next Week Finish hardware (comparators, interfacing) Multiplexing design Work on software (hardware I/O)