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

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Awesillo scope

AWESILLO-SCOPE

Team 2

Yimin Xiao

Jintao Zhang

Bo Yuan

Yang Yang


Overall description
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.


Major functions pssc
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



Reliability and safety
Reliability and Safety

  • Critical Conditions

  • Major components for analysis

  • Failure mode, effects, and criticality analysis (FMECA)


Possible critical conditions
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


Major components analysis
Major Components’ analysis

STM32 MCU

ℷp = 6.4305

MTTF: ~ 17 years

Xilinx Spartan-3E

ℷp = 3.99

MTTF: ~ 28.6years


Major components analysis1
Major Components’ analysis

Zener Diode

ℷp = 0.128

MTTF: ~ 891 years

Linear Regulator

ℷp = 0.48

MTTF: ~ 238 years


Major components analysis2
Major Components’ analysis

Instrumentation amplifier

ℷp = 0.00315 *

Analog MUX

ℷp = 0.158

MTTF: ~ 722 years

* Calculated by combination of internal/ external components.


Failure analysis mode
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


Failure analysis
Failure analysis


Failure analysis1
Failure analysis



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