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ECE 477 Reliability & Safety Analysis. Team 5 – myATM Xue Yuan Wong. Overview. Automated Teller Machine (ATM) Use face recognition technology to verify identity 4-digit PIN Read/Write cash card via RFID Touchpad to navigate user menu Occupancy sensor to detect user.

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ece 477 reliability safety analysis

ECE 477Reliability & Safety Analysis

Team 5 – myATM

Xue Yuan Wong

overview
Overview
  • Automated Teller Machine (ATM)
  • Use face recognition technology to verify identity
    • 4-digit PIN
  • Read/Write cash card via RFID
  • Touchpad to navigate user menu
  • Occupancy sensor to detect user
criticality l evels
Criticality Levels
  • High criticality
    • Failure that could potentially injure or harm the user.
    • Acceptable failure rate, λ <
  • Medium criticality
    • Failure that causes component(s) to damage and therefore not being able to function normally anymore.
    • Acceptable failure rate, λ <
criticality levels
Criticality Levels
  • Low criticality
    • Failure that results non-ideal operation of the component and does not harm the user
    • Acceptable failure rate, λ <
component analysis
Component Analysis
  • Microcontroller (Microchip PIC18F24J11)
    • Complex architecture
    • Perform various tasks (eg: sample keypad buttons, occupancy sensor, RFID data, control modulation)
  • Switching regulators (TI LM2675-3.3/5.0)
    • Handles large amount of current
component analysis1
Component Analysis
  • RFID read/write base station (Atmel U2270B)
    • Has 16 pins. Multiple modules inside the chip.
      • On-chip power supply circuit
      • Antenna driver circuit
      • Frequency generator
      • Signal processing circuit (modulation/demodulation)
    • Fast switching signals. Generate heat easily.
fmeca chart
FMECA Chart

Section A – Power Supply Block

fmeca chart1
FMECA Chart

Section B – Microcontroller Block

fmeca chart2
FMECA Chart

Section B – Microcontroller Block

fmeca chart3
FMECA Chart

Section C – RFID Block

fmeca chart4
FMECA Chart

Section C – RFID Block

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