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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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