Project

# Title Team Members TA Documents Sponsor
22 Covid-Safe/Self-Cleaning Fitting Room
Arin Manav
Bill Heniades
Ege Dora Guler
William Zhang design_document3.pdf
final_paper1.pdf
photo1.jpg
photo2.jpg
presentation1.pdf
proposal1.pdf
video1.mp4
**Partners:** Arin Manav, Ege Dora Guler, Bill Heniades

**NetID:** ymanav2, edguler2, wh8

**Title**: Covid-Safe/Self-Cleaning Fitting Room

**Problem**: Due to Covid, most stores closed their fitting rooms to customers as a safety measure. This has made buying new clothes an unpleasant experience as people can't use the fitting rooms to make sure they are buying the right size of the clothing. This is also costing money to clothing stores because of decreased customer satisfaction.

**Solution Overview:** A Covid-safe fitting room can detect when a customer enters the fitting room and leaves it in order to start a disinfection process that involves using UV light and sanitizer spray. A sound detector inside the room and two ultrasonic sensors installed next to each other horizontally at the entrance of the fitting room determines whether a customer is entering or leaving depending on which one of the two sensors is triggered first. When a customer enters the fitting room the wait state starts, and the Covid-Safe fitting room waits for the customer to leave. When the sensors detect the customer has left, the door automatically locks, the UV light turns on and sanitizer is automatically sprayed to surfaces in the fitting room. In addition to sensors at the entrance, a motion sensor can be used in the fitting room to make the customer detection more accurate. Also, a panic button inside prevents the customers from being stuck inside when the disinfection process starts. Instead of doing a full-scale model, a small glass tank can be used to represent a room and a scaled down implementation can be done. The UV light is a method being used in hospital environments and short durations of UV light exposure do not harm the material inside the room. Also, disinfection products are already being used in many commercial spaces, therefore in the long term, using the disinfection products wouldn’t cause harm to furniture or the products in the fitting room. Another feature of the room is the indicator light which changes color according to the state of the room. For example if someone is in the room it lights up yellow, when the disinfection is taking place it lights up red, and when the room is empty and disinfected it lights up green.

**Solution Components:**

**Advance detection scheme:**
For advance detection two ultrasonic sensors can be used to detect motion and a sound sensor can be used to make it more accurate. Using ultrasonic sensors for detecting the entrance and the exit of the customer prevents the privacy concerns related to using a camera to detect motion.

**Logic Circuit:**
We are planning to make a logic circuit using flip-flop TTL chips and other logic gates that implement a state diagram consisting of WAIT, DISINFECT, OPEN states. The signal from the sensors will be used as input to change between states. Depending on the state, the logic circuit will enable the UV light and the mechanical systems. The panic button works as a reset button and resets the states back to WAIT state.

**UV Light and Indicator Light:**
UV light is turned on during the DISINFECT state determined by the input going to the logic circuit. It turns off during the WAIT and OPEN states. The indicator light turns green when the room is in OPEN state, which indicates the room has been disinfected and is empty now. It turns yellow when the room is in the WAIT state and someone is inside the room. Finally, the indicator light turns red during the DISINFECT state.

**Mechanical Systems:**
A mechanical system using a servo motor locks the door in the DISINFECT state so that customers don’t accidentally enter the room during DISINFECTION. Another mechanical system sprays the disinfection product on the surfaces.

**Criteria for Success:**
- Our project will be a success if it accurately runs through the states when a customer is occupying the room and when they leave and it needs to be cleaned. Due to the scale of the product, our ‘customer’ would be a smaller mechanical robot that would move inside the room to create the sound and movements for the sensors to detect.

- The indicator lights indicate the right state.

- Panic button resets the states back to WAIT state.

- The disinfection solution covers a sufficient amount of the surface.

- The UV light turns on in the DISINFECT state and turns off during WAIT and OPEN states.

- The door automatically locks during the DISINFECT stage.

RFI Detector

Jamie Brunskill, Tyler Shaw, Kyle Stevens

RFI Detector

Featured Project

Problem Statement:

Radio frequency interference from cell phones disrupts measurements at the radio observatory in Arecibo, Puerto Rico. Many visitors do not comply when asked to turn their phones off or put them in airplane mode.

Description:

We are planning to design a handheld device that will be able to detect radio frequency interference from cell phones from approximately one meter away. This will allow someone to determine if a phone has been turned off or is in airplane mode.

The device will feature an RF front end consisting of antennas, filters, and matching networks. Multiple receiver chains may be used for different bands if necessary. They will feed into a detection circuit that will determine if the power within a given band is above a certain threshold. This information will be sent to a microcontroller that will provide visual/audible user feedback.

Project Videos