Project

# Title Team Members TA Documents Sponsor
8 Car Catalytic Converter Theft Prevention
Aditi Tyagi
Anushka Parikh
Shruthii Sathyanarayanan
Stasiu Chyczewski design_document3.pdf
final_paper1.pdf
photo1.jpg
photo2.jpg
presentation1.pptx
proposal1.pdf
# Car Catalytic Converter Theft Prevention

Team Members:
- Anushka Parikh (aparik28)
- Shruthii Sathyanarayanan (ss57)
- Aditi Tyagi (aditit2)

# Problem

The idea that was pitched by Stasiu Chyczewski was to solve the issue of large rates in reports of stolen catalytic converters. Thieves can very quickly steal these parts with basic tools and leave undetected. The increase in thefts are mostly due to the increase in the price of precious metals, making hybrids the most commonly targeted vehicles. Most victims end up having little evidence aside from stolen converters, and low quality video evidence.

# Solution

Create a surveillance device for catalytic converter theft. The device would be able to detect suspicious activity (for example tilting and vibrations), be compatible with a standard car’s electrical system, give real time notifications to the owner when the crime is happening, and would be mounted discreetly. Another feature would be having a camera functionality to solve the low quality surveillance video issue, and setting off an alarm when the suspicious activity occurred.

# Solution Components

## Subsystem 1

The first subsystem is the tilting and vibrations sensor. This sensor will be triggered if a car that is in park is tilted or if any vibration is detected in the undercarriage. Sensors that can detect this activity include the Passive Infrared (PIR) sensor, which is used to detect the presence of a human, Microwave sensors that use continuous waves of microwave radiation to detect motion, and Dual Tech Motion Sensors, which incorporates both PIR and Microwave sensors in order to have less false positives.

## Subsystem 2

The second subsystem is an alarm that is triggered when the vibration and tilting sensor is triggered. If the vibration and tilting sensor is triggered longer than a few seconds, an alarm attached to the undercarriage of the car will start ringing. Additionally, a notification will be sent to the owner of the car informing them of any suspicious activity. This subsystem will depend on WiFi, and when the vibration and titling sensors are triggered, the device will use WiFi to send a notification to the user, alerting them in real time.

## Subsystem 3

The third subsystem is the camera. The camera needs to be small and will blend into the car. It should turn on and begin recording when the tilting and vibrations sensor is triggered. This subsystem will also use WiFi to be able to stream the camera activity and show it live to the user. The camera live field and the notifications will be presented to the user on the same platform.

# Criterion For Success

1. When the vibration and tilt sensor is triggered: The alarm turns on, a notification is sent to the owner, the camera turns on and begins recording
2. The camera can capture footage and the footage can be retrieved by the user
3. The device is discreet and can be mounted on the car
4. The device can be turned on and off manually
5. The device can be turned off before the car is about to be driven
6. The device can be turned back on after the car is parked

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)