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AWESILLO-SCOPE

AWESILLO-SCOPE. Team 2 Yimin Xiao Jintao Zhang Bo Yuan Yang Yang. Overall Description.

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AWESILLO-SCOPE

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  1. AWESILLO-SCOPE Team 2 Yimin Xiao Jintao Zhang Bo Yuan Yang Yang

  2. Overall Description • The project we propose is a digital oscilloscope with playback function that provides almost any function of a typical oscilloscope, such as digital sampling, signal processing, auto-scale setting, cursor setting, reconstruction and visualization of signals. Additional features such as recording and replicating signals as a function generator, interacting with PC via USB and GUI display of signals will also be included.

  3. Major Functions / PSSC • An ability to sample analog V/I signal via BNC • An ability to reconstruct and display the sampled signal on VGA display • An ability to create general oscilloscope interface and realize basic functions • An ability to store/load the sampled signal to/from external memory • An ability to replay signal stored in external storage device

  4. Block Diagram

  5. Reliability and Safety • Critical Conditions • Major components for analysis • Failure mode, effects, and criticality analysis (FMECA)

  6. Possible Critical Conditions • Power circuit Overload • Linear regulator failure • Overload of input voltage (Harm to product only) • User select wrong voltage input scale • Multiplexer did not work correctly • Zener diode failure • Input not acknowledged (Harm to product) • Amplifier overloaded • ATD channel failure

  7. Major Components’ analysis STM32 MCU ℷp = 6.4305 MTTF: ~ 17 years Xilinx Spartan-3E ℷp = 3.99 MTTF: ~ 28.6years

  8. Major Components’ analysis Zener Diode ℷp = 0.128 MTTF: ~ 891 years Linear Regulator ℷp = 0.48 MTTF: ~ 238 years

  9. Major Components’ analysis Instrumentation amplifier ℷp = 0.00315 * Analog MUX ℷp = 0.158 MTTF: ~ 722 years * Calculated by combination of internal/ external components.

  10. Failure analysis Mode • A – Inputs, include circuitry and analog voltage • B – Power circuitry • C – FPGA , display unit • D – MCU, sampling process (digital value) • E – Transmission

  11. Failure analysis

  12. Failure analysis

  13. Questions?

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