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ECE 477 Reliability & Safety Analysis

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

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  1. ECE 477Reliability & Safety Analysis Team 5 – myATM Xue Yuan Wong

  2. 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

  3. 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 <

  4. Criticality Levels • Low criticality • Failure that results non-ideal operation of the component and does not harm the user • Acceptable failure rate, λ <

  5. 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

  6. 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.

  7. Section A - Power Supply Block

  8. Section B - Microcontroller Block (1)

  9. Section B - Microcontroller Block (2)

  10. Section C – RFID Block

  11. FMECA Chart Section A – Power Supply Block

  12. FMECA Chart Section B – Microcontroller Block

  13. FMECA Chart Section B – Microcontroller Block

  14. FMECA Chart Section C – RFID Block

  15. FMECA Chart Section C – RFID Block

  16. Question

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