1 / 31

SafeGuard: Anti-Theft/Reminder Transmitter Group: #3 Carson Hammoser Peter Lin Albert Uang Samuel Wong

SafeGuard: Anti-Theft/Reminder Transmitter Group: #3 Carson Hammoser Peter Lin Albert Uang Samuel Wong The Problem Lost and Forgotten Items Lost Property Office of Transport for London 130 000 items between April 2003 and March 2004

paul
Download Presentation

SafeGuard: Anti-Theft/Reminder Transmitter Group: #3 Carson Hammoser Peter Lin Albert Uang Samuel Wong

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SafeGuard: Anti-Theft/Reminder Transmitter Group: #3 Carson Hammoser Peter Lin Albert Uang Samuel Wong

  2. The Problem • Lost and Forgotten Items • Lost Property Office of Transport for London 130 000 items between April 2003 and March 2004 • 11300 Laptops, 31400 PDA’s, 200 000 Cell phones Left in the backs of cabs • Security • 5035 Pickpocket crimes in London Underground • Keeping Track of Kids and Pets • 58200 Child Abductions in US

  3. Solution • A tracking device that warns the user when things are left behind or move too far away • Able to track multiple items • Able to recognize each item

  4. Proposed Product: The SafeGuard • Wireless electronic tether • Tracks multiple objects on one transmitter • Audio warning when items are out of range • Programmable Identification of Item

  5. System Overview

  6. System Overview: • User places RF tags on selected items • Clip to your Cell phone/PDA • Slip into your wallet / jacket pocket • Place In glasses Case • Place in backpack/briefcase

  7. System Overview: • User carries an RF Receiver • LCD Display • Piezoelectric Buzzer • Joystick Interface • Activate/Sleep/Deactivate Insert Receiver Picture

  8. Transmitter Software

  9. Transmitter Hardware • Atmel ATTiny2313 • Chipcon CC1000 Transceiver • Low Current Consumption • Small • Antennae Design

  10. ATTiny2313 • Larger File Size • SRAM • Watchdog Timer • UART • Small package • SPI

  11. CC1000 • Operating Frequency • Configuration • SmartRF Studio

  12. Antennae Design

  13. Antennae Design

  14. Antennae Design

  15. Antennae Design

  16. Receiver Hardware • ATMega32 • LINX RXM-900-HP-II • LCD • Joystick

  17. ATMega32L • Low Current Consumption • RISC Architecture • 32K Flash Memory • 1024 Bytes EEPROM • 3 Counters • Programmable Serial UART • Input Capture • 3 External Interrupts

  18. LINX RXM-900-HP-II • Programmable Carrier Frequencies • Direct Serial Interface • No External RF Components • No Tuning Required • Easy Usage

  19. LCD • Standard Hitachi HD44780 Driver • Small compact size • ~2mA consumption • Command Set

  20. Joystick • Low amounts of board real-estate • Multidirectional Usage • Intuitive User Interface • De-bouncing

  21. Receiver Scheme • Timer Interrupt Polls • Receives a Constant Pulse • Interrupt • Input Capture • Checks Pulse Width • Changes Frequencies

  22. Batteries • 2032 • 2477 • Good Supply Voltage • Low Battery Profile • Reasonable Supply Curve • mAh

  23. Problems and Solutions • ATTiny12 • Antennas and attenuation • RF Boards – Current Draw • Initialization of the CC1000 • Soldering the CC1000 • Doesn’t flash with components connected • LCD Initialization failure • LCD Buffer Circuit

  24. Things to Complete/Further Work • Build multiple transmitters • Utilize a CDMA scheme to increase resilience to noise and free up channels • Implement a sleep/watchdog timer • Minimize package

  25. Budget

  26. Personal Reflections • NEVER try to fabricate your own boards for RF • Avoid prototyping with surface mounts • Multiply projected timelines by 4 as opposed to 2 • The best place to crash is the Sunny room

  27. Conclusion • Good experience taking a project from scratch to close to completion • Learned to deal with group dynamics • Sleep is an option not a necessity

  28. Thank You Questions

  29. References • “Lost and Found.com: The Internet Lost and Found,” [Online Document] Available: http://www.internetlostandfound.com/ • “Lost Property Office - Statistics,” [Online document] Available: http://www.tfl.gov.uk/tfl/ph_lost-stats.shtml • “Survey: Thousands Leave Laptops, Mobiles in Cabs,” Jan. 24, 2005 [Online document] Available: http://edition.cnn.com/2005/TECH/ptech/01/24/taxis.lost.reut/index.html • “New Tube Crackdown Puts Pickpockets on the Run,” [Online document] Available: http://tube.tfl.gov.uk/content/pressreleases/0110/29.asp • “1551KGY” Image. http://www.hammondmfg.com/1551K2B.jpg • Smith, Kent (RFM). “Antennas for Low Power Applications”. Feb 8, 2005. www.rfm.com/corp/appdata/antenna.pdf • “Atmel SOIC” http://sub.chipdoc.ru/im/atmel/avr/2313_p.gif • “Atmel TQFP” http://www.epsilon.com.pl/img/at90s8515_tqfp2b_250.jpg • “TPA Navigation Tact Switch” http://www.ittcannon.com/media/pdf/catalogs/tpa.pdf • “HP Tx and Rx” http://www.linxtechnologies.com/index.php?section=products&category=rf_modules&subcategory=hp-3_series • “Peter Ouwehand.“How to control a HD44780-based Character-LCD. 2005. http://home.iae.nl/users/pouweha/lcd/lcd0.shtml • “2032” http://rocky.digikey.com/WebLib/Panasonic/Web%20Photos/CR2032.jpg

More Related