1 / 7

Project Forget-Me-Not

This project focuses on developing a child safety seat monitoring system that interfaces with the vehicle's OBD-II port. Key functionalities include determining the vehicle's operating state, detecting the presence of a child in a safety seat, and sounding an audible alarm when the ignition is turned off. The design incorporates multiple safety seats, utilizes various protocols for communication, and ensures low power consumption. Important design considerations include audio output, on-chip peripherals, memory requirements, and cost-efficiency.

darice
Télécharger la présentation

Project Forget-Me-Not

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. Project Forget-Me-Not TCSP2 - Design Constraints ECE477 Group 4 Chris Cadwallader Craig Pilcher Andy sydelko Mike williams

  2. Updated PSSCs • An ability to determine the operating state of the vehicle via the OBD-II port. • An ability to determine the presence of a child in a safety seat. • An ability to use multiple safety seats in one vehicle. • An ability to sound an audible alarm when the ignition is turned off. • An ability to interface directly to the internal vehicle CAN.

  3. Block Diagrams

  4. Block Diagrams

  5. Important Design Constraints • On-chip peripherals • CAN, PWM for audio output • On-chip memory • Flash for audio samples • Power consumption • Child-side is battery powered • Cost • Off-chip peripherals • RF Tx/Rx, 433 MHz

  6. Microcontroller – 9S12DP512C • Advantages • Multiple OBD-II protocols supported • CAN, SWCAN, Keyword 2000, J1850 • PWM, A/D for older protocols • Built-in software libraries (Code Warrior) • 512K Flash • 2 SCI ports (debugging and RF decoder) • Extra input pins for future expansion • 8 inputs = 256 possible status messages • Disadvantages • Audio – Want to be loud enough to hear easily • LM386 Audio Amplifier

  7. Wireless Interface • RF • Adequate range • Low power consumption • Low cost • Linx XCVR • Tx and Rx units easily paired • No micro needed on Tx side – lowers power cost • RFID • Passive transmitters – low range • Active transmitters – disposed after use • Prohibitively expensive

More Related