Project

# Title Team Members TA Documents Sponsor
27 Office Access Control System
 Shar Alamgir
Thomas Ng
Vincent Nguyen
 Anand Sunderrajan design_document1.pdf
final_paper1.pdf
proposal1.pdf
Thomas Ng (thomasn3), Vincent Nguyen (vn4), Shar Alamgir (alamgir2)


# Problem:
The current BP Spark office only has two keys. This makes access to the office only available if one of these two people are in the office. It poses a security risk if someone loses the key because someone else can access the office. BP is looking for a way to make the office more secure and accessible to their employees.

# Solution:
To solve this problem, we will integrate a two-factor authentication system for access into a room, attached to the entry point of the room. The door will require people to validate themselves via two out of three forms of identification: Cell Phone Proximity, Facial Recognition, and Pin Access. This will ensure more secure entry to the office as it will validate a person using something they have, something they know, and a biometric quality.

# Subsystems

## Cell Phone (RFID, NFC)

## Facial recognition (software + hardware)
- Raspberry Pi
- Camera Module
- Azure cloud for faces
- Hashing Algorithm

## Pin Access
- Keypad

## Door locking/unlocking (magnetic door)

## Authentication center (ties together access)
- Log Access
- Door Location

## Emergency Exit
- Heat Sensor (fire)
- Internal camera

# Criterion for Success:
- System works with available door strikers
- Is secure and protects personally identifiable information
- Must be hosted in Azure Cloud
- Provides emergency capabilities in case of fire or other issues
- Supports multiple entry points in the location
- Logs access records correctly and securely
- Works with single and double door configurations
- Works with all types of smartphones

UV Sensor and Alert System - Skin Protection

Liz Boehning, Gavin Chan, Jimmy Huh

UV Sensor and Alert System - Skin Protection

Featured Project

Team Members:

- Elizabeth Boehning (elb5)

- Gavin Chan (gavintc2)

- Jimmy Huh (yeaho2)

# Problem

Too much sun exposure can lead to sunburn and an increased risk of skin cancer. Without active and mindful monitoring, it can be difficult to tell how much sun exposure one is getting and when one needs to seek protection from the sun, such as applying sunscreen or getting into shady areas. This is even more of an issue for those with fair skin, but also can be applicable to prevent skin damage for everyone, specifically for those who spend a lot of time outside for work (construction) or leisure activities (runners, outdoor athletes).

# Solution

Our solution is to create a wristband that tracks UV exposure and alerts the user to reapply sunscreen or seek shade to prevent skin damage. By creating a device that tracks intensity and exposure to harmful UV light from the sun, the user can limit their time in the sun (especially during periods of increased UV exposure) and apply sunscreen or seek shade when necessary, without the need of manually tracking how long the user is exposed to sunlight. By doing so, the short-term risk of sunburn and long-term risk of skin cancer is decreased.

The sensors/wristbands that we have seen only provide feedback in the sense of color changing once a certain exposure limit has been reached. For our device, we would like to also input user feedback to actively alert the user repeatedly to ensure safe extended sun exposure.

# Solution Components

## Subsystem 1 - Sensor Interface

This subsystem contains the UV sensors. There are two types of UV wavelengths that are damaging to human skin and reach the surface of Earth: UV-A and UV-B. Therefore, this subsystem will contain two sensors to measure each of those wavelengths and output a voltage for the MCU subsystem to interpret as energy intensity. The following sensors will be used:

- GUVA-T21GH - https://www.digikey.com/en/products/detail/genicom-co-ltd/GUVA-T21GH/10474931

- GUVB-T21GH - https://www.digikey.com/en/products/detail/genicom-co-ltd/GUVB-T21GH/10474933

## Subsystem 2 - MCU

This subsystem will include a microcontroller for controlling the device. It will take input from the sensor interface, interpret the input as energy intensity, and track how long the sensor is exposed to UV. When applicable, the MCU will output signals to the User Interface subsystem to notify the user to take action for sun exposure and will input signals from the User Interface subsystem if the user has put on sunscreen.

## Subsystem 3 - Power

This subsystem will provide power to the system through a rechargeable, lithium-ion battery, and a switching boost converter for the rest of the system. This section will require some consultation to ensure the best choice is made for our device.

## Subsystem 4 - User Interface

This subsystem will provide feedback to the user and accept feedback from the user. Once the user has been exposed to significant UV light, this subsystem will use a vibration motor to vibrate and notify the user to put on more sunscreen or get into the shade. Once they have done so, they can press a button to notify the system that they have put on more sunscreen, which will be sent as an output to the MCU subsystem.

We are looking into using one of the following vibration motors:

- TEK002 - https://www.digikey.com/en/products/detail/sparkfun-electronics/DEV-11008/5768371

- DEV-11008 - https://www.digikey.com/en/products/detail/pimoroni-ltd/TEK002/7933302

# Criterion For Success

- Last at least 16 hours on battery power

- Accurately measures amount of time and intensity of harmful UV light

- Notifies user of sustained UV exposure (vibration motor) and resets exposure timer if more sunscreen is applied (button is pressed)