Remote Proctoring Device

Prototype Design


Hardware parts:

  1. Touch screen display: When the device is powered up, you will see your desktop application and can freely navigate through the application with a stylus.
  2. Camera: 5-megapixel camera with a wide-angle view.
  3. Charging port: A micro USB socket that can supply 5V to the touch screen.
  4. HDMI port: HDMI port that helps to display the UI on the touch screen.
  5. USB ports: Can be used to connect external peripherals such as keyboard and mouse.
  6. Extendable arm: Can be adjusted freely up and down as well as to the front and back to properly place your view in front of the camera.
  7. UPS housing: Contains the backup battery unit which will uninterruptibly supply power to the device even in case of power failure.
  8. On/Off button: Turns the device on and off
  9. 12V DC jack: Connect a 12V adapter to this slot to charge the UPS unit.

Raspberry Pi Peripherals

Circuit diagram of the proctoring device on the student's side

The proctoring device in the student's side has 2 main components.

  • The raspberry pi 3B+ module with a touch screen,camera,microphone and speaker connected.
  • Power Supply unit

Components

Raspberry Pi 3B+

  • 5V/2.5A DC power input
  • Built-in wifi module
  • Micro SD port
  • CSI camera port
  • Full-size HDMI

LCD Touch Screen

  • 800 x 480 HD resolution
  • HDMI interface for displaying
  • USB interface for touch control
  • Supports the backlight control to save the electricity

Raspberry Pi Camera

  • 5 megapixel camera
  • Pixel Count 2592 x 1944
  • Capture video at 1080p30 with H.264 encoding
  • Angle of View 54 x 41 degrees
  • Field of View 2.0 x 1.33 m at 2 m

USB Microphone

  • Driver-free
  • Plug and play
  • Frequency response:100-16kHz

Speaker

  • Diameter 2.9cm Loud Speaker
  • Amplifier board 5W x2 Stereo

Micro SD card

  • 32 GB

Cooling fan

Uninterruptible Power Supply

Circuit diagram of the power supply unit

  • The power supply unit has three Li-ion batteries to supply power to the main unit incase of a power failure.
  • The adjustable step-down power supply module supplies a constant 5V power supply to the raspberry pi board
  • The 3S charging board regulates the voltage supplied to the raspberry pi unit and cuts off supply when the batteries are discharging below the average value.

Components

Lithium-ion 18650 batteries

  • Capacity 1200mAh
  • Average voltage rating - 3.7V

3S charging board

  • Charging and discharging protection

Adjustable step-down power Supply module

12V DC power jack

Micro USB jack

Other Phases

Design Architecture

The device on the student's side is capable of capturing the video and audio stream from students continuously even incase of a power ....

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Frontend Implementation

The student can create an account in the platform by registering to the service. Once the students email is verified....

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Backend Implementation

The two types of users proctor & student are defined using a disjoint specialization. Exam, Course, Device, and Recording....

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Testing and Integration

Functional requirements will be tested under three main stages.Unit testing, Integration testing, End-to-end testing ....

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