Project

# Title Team Members TA Documents Sponsor
67 Vehicle Fever Detection System
 Rahul Rajkumar
Vinayak Dhanawade
Vishnu Rathnam
 Dean Biskup design_document3.pdf
design_document4.pdf
design_document2.pdf
other1.pdf
other2.docx
other3.pdf
proposal1.pdf
Team Members:

Rahul Rajkumar, Vinayak Dhanawade, Vishnu Rathnam

rahulrr2, vinayak2, rathnam3

Problem:

A problem that we currently face in society due to the state of the COVID 19 pandemic is that rideshare/taxi driver and patrons are put at a high risk of transmitting COVID 19 by being in close proximity to others in an enclosed space as well as by touching surfaces that are frequently used and touched by many others. While masks suffice to prevent spread in open spaces, their effectiveness is severely limited in an enclosed space with limited ventilation like a car.

Solution Overview :

Our solution to this problem to is implement a system that can be mounted on the interior door of vehicles that extends an IR thermometer out the window to check riders temperatures before they enter the vehicle. The system will then alert the driver via a digital display as to whether the current passenger has a fever or not and give the specific temperature. The driver can then decide on a plan of action with this information in order to effectively limit the spread of COVID 19 and ensure both their safety and that of future passengers. This system also has applications in the future after the pandemic in that drivers can choose whether or not to accept riders that are sick in general based on whether or not they have a fever, a common flu symptom.\

Solution components ;

[subsystem #1 : Mechanical arm] :
The mechanical arm system will rest in the passenger seat, and will extend a thermometer out of the open window when the window is opened. To automate this process, we will affix an ultrasonic sensor to the module so that when the window is lowered, the arm extends the thermometer out to take a reading. This provides the driver with convenient control over this arm subsystem.

[subsystem #2 : Fever detection] :
In order to determine whether or not the potential passenger has a fever, we will be using an IR thermometer affixed to an extending mechanical arm, with its data being sent to an arduino.

[subsystem #3 : Driver Display and Linking] :
This is a digital control panel for the driver to receive data and a recommended course of action based on the thermometer’s reading. The control panel will thus have to be linked to the thermometer such that the driver knows whether to allow a passenger in or not.

Criteria for Success :

The high-level goals for this project include building the mechanical arm with an ultrasonic sensor, building the temperature reading system, and linking these to a convenient hub for the driver to use. In order for our project to effectively tackle this problem, we need for the arm to successfully extend the thermometer out of the car window whenever the window is lowered. Additionally, a criteria we require is for the thermometer to accurately read temperatures and send this data to an arduino. Finally, we must have an informational display to provide the driver with necessary information such as the temperature of the potential passenger, and the recommended course of action. For this display to work properly we require that it is efficiently connected to the other components of the overall system.

Healthy Chair

Ryan Chen, Alan Tokarsky, Tod Wang

Healthy Chair

Featured Project

Team Members:

- Wang Qiuyu (qiuyuw2)

- Ryan Chen (ryanc6)

- Alan Torkarsky(alanmt2)

## Problem

The majority of the population sits for most of the day, whether it’s students doing homework or

employees working at a desk. In particular, during the Covid era where many people are either

working at home or quarantining for long periods of time, they tend to work out less and sit

longer, making it more likely for people to result in obesity, hemorrhoids, and even heart

diseases. In addition, sitting too long is detrimental to one’s bottom and urinary tract, and can

result in urinary urgency, and poor sitting posture can lead to reduced blood circulation, joint

and muscle pain, and other health-related issues.

## Solution

Our team is proposing a project to develop a healthy chair that aims at addressing the problems

mentioned above by reminding people if they have been sitting for too long, using a fan to cool

off the chair, and making people aware of their unhealthy leaning posture.

1. It uses thin film pressure sensors under the chair’s seat to detect the presence of a user,

and pressure sensors on the chair’s back to detect the leaning posture of the user.

2. It uses a temperature sensor under the chair’s seat, and if the seat’s temperature goes

beyond a set temperature threshold, a fan below will be turned on by the microcontroller.

3. It utilizes an LCD display with programmable user interface. The user is able to input the

duration of time the chair will alert the user.

4. It uses a voice module to remind the user if he or she has been sitting for too long. The

sitting time is inputted by the user and tracked by the microcontroller.

5. Utilize only a voice chip instead of the existing speech module to construct our own

voice module.

6. The "smart" chair is able to analyze the situation that the chair surface temperature

exceeds a certain temperature within 24 hours and warns the user about it.

## Solution Components

## Signal Acquisition Subsystem

The signal acquisition subsystem is composed of multiple pressure sensors and a temperature

sensor. This subsystem provides all the input signals (pressure exerted on the bottom and the

back of the chair, as well as the chair’s temperature) that go into the microcontroller. We will be

using RP-C18.3-ST thin film pressure sensors and MLX90614-DCC non-contact IR temperature

sensor.

## Microcontroller Subsystem

In order to achieve seamless data transfer and have enough IO for all the sensors we will use

two ATMEGA88A-PU microcontrollers. One microcontroller is used to take the inputs and

serves as the master, and the second one controls the outputs and acts as the slave. We will

use I2C communication to let the two microcontrollers talk to each other. The microcontrollers

will also be programmed with the ch340g usb to ttl converter. They will be programmed outside

the board and placed into it to avoid over cluttering the PCB with extra circuits.

The microcontroller will be in charge of processing the data that it receives from all input

sensors: pressure and temperature. Once it determines that there is a person sitting on it we

can use the internal clock to begin tracking how long they have been sitting. The clock will also

be used to determine if the person has stood up for a break. The microcontroller will also use

the readings from the temperature sensor to determine if the chair has been overheating to turn

on the fans if necessary. A speaker will tell the user to get up and stretch for a while when they

have been sitting for too long. We will use the speech module to create speech through the

speaker to inform the user of their lengthy sitting duration.

The microcontroller will also be able to relay data about the posture to the led screen for the

user. When it’s detected that the user is leaning against the chair improperly for too long from

the thin film pressure sensors on the chair back, we will flash the corresponding LEDs to notify

the user of their unhealthy sitting posture.

## Implementation Subsystem

The implementation subsystem can be further broken down into three modules: the fan module,

the speech module, and the LCD module. This subsystem includes all the outputs controlled by

the microcontroller. We will be using a MF40100V2-1000U-A99 fan for the fan module,

ISD4002-240PY voice record chip for the speech module, and Adafruit 1.54" 240x240 Wide

Angle TFT LCD Display with MicroSD - ST7789 LCD display for the OLED.

## Power Subsystem

The power subsystem converts 120V AC voltage to a lower DC voltage. Since most of the input

and output sensors, as well as the ATMEGA88A-PU microcontroller operate under a DC voltage

of around or less than 5V, we will be implementing the power subsystem that can switch

between a battery and normal power from the wall.

## Criteria for Success

-The thin film pressure sensors on the bottom of the chair are able to detect the pressure of a

human sitting on the chair

-The temperature sensor is able to detect an increase in temperature and turns the fan as

temperature goes beyond our set threshold temperature. After the temperature decreases

below the threshold, the fan is able to be turned off by the microcontroller

-The thin film pressure sensors on the back of the chair are able to detect unhealthy sitting

posture

-The outputs of the implementation subsystem including the speech, fan, and LCD modules are

able to function as described above and inform the user correctly

## Envision of Final Demo

Our final demo of the healthy chair project is an office chair with grids. The office chair’s back

holds several other pressure sensors to detect the person’s leaning posture. The pressure and

temperature sensors are located under the office chair. After receiving input time from the user,

the healthy chair is able to warn the user if he has been sitting for too long by alerting him from

the speech module. The fan below the chair’s seat is able to turn on after the chair seat’s

temperature goes beyond a set threshold temperature. The LCD displays which sensors are

activated and it also receives the user’s time input.

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