Project

# Title Team Members TA Documents Sponsor
21 Sleep Cycle-Triggered Lighting Wake up
Han Chen
Melech Lapson
Weipeng Wang
 Dean Biskup design_document4.pdf
final_paper2.pdf
presentation1.pdf
proposal1.pdf
#Problem

Many peoples have struggles waking up in the morning. Even with an alarm clock, many people still feel tired or just hit the snooze button and just go back to sleep. There has to be a better way to wake up in the morning.

#Solution Overview

Some new technologies attempt to track a user's sleep cycle to know the optimal time to wake them up with an alarm. Other studies show that using light instead of sound to wake up in the morning makes it easier to wake up, Our plan is to combine these technologies to create a device that will track your sleep cycle and then trigger a lightbulb to turn on. This will allow us to leverage the benefits of both technologies to help people wake up.
We plan to make this device fit on a band/watch which a user will wear and will use a microphone, pulse sensor, and accelerometer to measure the user's noise, heart rate, and movement respectively. These will help us determine what sleep cycle they are in. Additionally. we plan to use a bluetooth module to connect the device with the lgihtbulb and signal the light bulb when to turn on. We expect that this will require users to buy these specific lightbulbs to use the band.

#Solutiion Components

##Band Subsystem

-Will fit on the arm of the user and measure heart rate, noise, and movement.

-Will quickly signal the lightbulb whether to turn on or not

-Will be battery powered

##Light subsystem

-Will be small enough to attach to a standard lightbulb and not impede its connections.

-Will allow the band to communicate to turn on the light

#Criterion for Success

We would consider this project a success if we could build a working prototype with a band that tracks the heart rate, motion, and noise of a user and use that data to correctly interpret whether a user is sleeping and what sleep cycle he's in. The band should also be able to communicate with the lightbulb and the lightbulb will turn on when the band sends the signal.

Resonant Cavity Field Profiler

Salaj Ganesh, Max Goin, Furkan Yazici

Resonant Cavity Field Profiler

Featured Project

# Team Members:

- Max Goin (jgoin2)

- Furkan Yazici (fyazici2)

- Salaj Ganesh (salajg2)

# Problem

We are interested in completing the project proposal submitted by Starfire for designing a device to tune Resonant Cavity Particle Accelerators. We are working with Tom Houlahan, the engineer responsible for the project, and have met with him to discuss the project already.

Resonant Cavity Particle Accelerators require fine control and characterization of their electric field to function correctly. This can be accomplished by pulling a metal bead through the cavities displacing empty volume occupied by the field, resulting in measurable changes to its operation. This is typically done manually, which is very time-consuming (can take up to 2 days).

# Solution

We intend on massively speeding up this process by designing an apparatus to automate the process using a microcontroller and stepper motor driver. This device will move the bead through all 4 cavities of the accelerator while simultaneously making measurements to estimate the current field conditions in response to the bead. This will help technicians properly tune the cavities to obtain optimum performance.

# Solution Components

## MCU:

STM32Fxxx (depending on availability)

Supplies drive signals to a stepper motor to step the metal bead through the 4 quadrants of the RF cavity. Controls a front panel to indicate the current state of the system. Communicates to an external computer to allow the user to set operating conditions and to log position and field intensity data for further analysis.

An MCU with a decent onboard ADC and DAC would be preferred to keep design complexity minimum. Otherwise, high MIPS performance isn’t critical.

## Frequency-Lock Circuitry:

Maintains a drive frequency that is equal to the resonant frequency. A series of op-amps will filter and form a control loop from output signals from the RF front end before sampling by the ADCs. 2 Op-Amps will be required for this task with no specific performance requirements.

## AC/DC Conversion & Regulation:

Takes an AC voltage(120V, 60Hz) from the wall and supplies a stable DC voltage to power MCU and motor driver. Ripple output must meet minimum specifications as stated in the selected MCU datasheet.

## Stepper Drive:

IC to control a stepper motor. There are many options available, for example, a Trinamic TMC2100. Any stepper driver with a decent resolution will work just fine. The stepper motor will not experience large loading, so the part choice can be very flexible.

## ADC/DAC:

Samples feedback signals from the RF front end and outputs the digital signal to MCU. This component may also be built into the MCU.

## Front Panel Indicator:

Displays the system's current state, most likely a couple of LEDs indicating progress/completion of tuning.

## USB Interface:

Establishes communication between the MCU and computer. This component may also be built into the MCU.

## Software:

Logs the data gathered by the MCU for future use over the USB connection. The position of the metal ball and phase shift will be recorded for analysis.

## Test Bed:

We will have a small (~ 1 foot) proof of concept accelerator for the purposes of testing. It will be supplied by Starfire with the required hardware for testing. This can be left in the lab for us to use as needed. The final demonstration will be with a full-size accelerator.

# Criterion For Success:

- Demonstrate successful field characterization within the resonant cavities on a full-sized accelerator.

- Data will be logged on a PC for later use.

- Characterization completion will be faster than current methods.

- The device would not need any input from an operator until completion.

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