Project :: ECE 445 - Senior Design Laboratory

#	Title	Team Members	TA	Documents	Sponsor
64	FPV Racing Drone	Eli O'Malley Griffin Descant Hunter Baisden	Tianxiang Zheng	design_document1.pdf final_paper1.pdf photo1.png photo2.png presentation1.pdf proposal1.pdf video
	# FPV Racing Drone Team members: - Elias O'Malley (eliasco2) - Hunter Baisden (baisden2) - Griffin Descant (descant2) # Problem FPV Racing drones are usually very large and fast and thus require a large space. The Center for Autonomy Labs has a flying arena for lightweight drones such as the Crazyflie. However, the Crazyflie do not have a first person view. # Solution We propose to develop a small, lightweight FPV system for the Crazyflie in order to facilitate lightweight, small-space drone racing. # Solution Components ## Power system The system will draw power from the Crazyflie and use regulators to power each of the subsystems. ## Camera A lightweight camera will be used to capture video from the drone. ## Transmitter/Receiver A video transmitter on the drone will stream the video from the camera to a receiver connected to the headset. ## Video Processor Microprocessors on the drone and at the receiving end will convert the camera data for transmitting and the received data back to video for the headset. ## IF LED Array In order to track the location of the drone for the purpose of racing analytics, an infrared LED array will be attached to the drone to display a programmable pattern. This would allow the simultaneous tracking and differentiation of multiple drones in the future. This will be tracked using the labs Vicon motion tracking system. # Criterion for Success 1 – The Vicon motion system should successfully track the drone using the IF LED array. 2 - The headset should receive a video stream of at least 30Hz. 3 – The Crazyflie should be able to maintain flight for 3 mins with the system running.

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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)

Project

UV Sensor and Alert System - Skin Protection

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