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Articles 1 - 24 of 24
Full-Text Articles in Engineering
Free Space Optical Communication, Anuj Gohil
Free Space Optical Communication, Anuj Gohil
Electrical Engineering
Communication is key to day to day activities for all companies and people. Wireless communication has made us expect more from our tools. Radio Frequency has been the preferred medium for a couple decades, but there is a need for faster secure communication. Free Space Optical Communication is an alternate wireless communication system which uses optics to create a link. It utilizes low-power and converts an analog signal into digital pulses which are transmitted across space to a receiver. Its only caveat is its vulnerability under atmospheric obstacles. The goal of this project is to create a free space optical …
Pv Mppt Water Pump Controller, Jacob R. Lamkin
Pv Mppt Water Pump Controller, Jacob R. Lamkin
Electrical Engineering
The intention of this project is to create a low cost way to extract the maximum useful power from a PV module to power a water pump. This approach will yield maximum financial and technical accessibility for end users. The project was successful in powering a water pump from a PV module as desired, and the microcontroller driven control circuitry was capable of finding and maintaining operation at the maximum power point of the PV module. Due to the low performance of the buck converter used in this project, this approach was not as efficient as desired and would require …
Blood Glucose Predictor, Jessica Patterson
Blood Glucose Predictor, Jessica Patterson
Electrical Engineering
For my senior project, I perform data analysis using statistical methods to determine body metrics that correlate with blood glucose levels. Working with Dr. Tina Smilkstein, I take repeat measurements from 6 different volunteers to establish trends in bodily metric data. The data taken includes weight, body fat, pulse rate, VO2, blood glucose, blood pressure, hours slept, and quality of sleep. Using these values, I use the program MiniTab to view results.
A few examples of correlations with blood glucose found in this project are:
- Systolic blood pressure for females had a regression line of 124.0 -0.3366*Blood Pressure. This indicates …
Automatic Gain Control Integrated Circuit, Kyman Huang, Garth Leung, Lauren Williams
Automatic Gain Control Integrated Circuit, Kyman Huang, Garth Leung, Lauren Williams
Electrical Engineering
This paper aims to describe the design process of an automatic gain controller (AGC) integrated circuit. An AGC is intended to provide variable gain in order to produce a consistent, distortionless output with a wide range of input magnitudes. This implementation was created as a standalone, small IC for audio systems. The chip requires only 7 pins, allowing for a small 8-pin package. LTSpice was used for the circuit design process and initial simulation. Cadence Virtuoso was used for the circuit layout and further simulations. Xilinx Vivado was used for digital circuit design and initial simulations. This project set out …
Dc To Dc Usb-C Charger, Nikki Gmerek, Kenneth Nguyen, Uriel Serna
Dc To Dc Usb-C Charger, Nikki Gmerek, Kenneth Nguyen, Uriel Serna
Electrical Engineering
The DC House USB-C Charger will convert the 48V input from the DC house, found on the Cal Poly campus, to 3 USB-C outputs: 5V, 12V, and 24 volts. The converter will deliver a total of 185 Watts out across all 3 outputs, with an efficiency greater than 82% at full load. The USB-C ports will be used to connect to compatible phones, laptops or any other device for charging/powering purposes. The goal of this project is to develop the most efficient and safe converter to deliver power to multiple outputs using USB-C, for items as small as a cell …
Dc House Smart Pathway Lighting System, Benjamin H. Tan, Rafael Santiago, Brendan Schoemehl
Dc House Smart Pathway Lighting System, Benjamin H. Tan, Rafael Santiago, Brendan Schoemehl
Electrical Engineering
The Student Experimental Farm (SEF) is a two-acre site where students are able to create projects and experiments. It is also the location of the DC House project, a house with electricity provided by DC power as opposed to the traditional AC power. The motive of the DC house project is to provide affordable and renewable electricity for people living in remote areas where ac power grids are not available. Currently, the SEF does not have any lighting, so students would have to work in the dark after the sun sets. By creating a smart lighting system for the pathway …
Dc-Dc Buck-Boost Converter For Energy Harvesting From Exercise Equipment, David T. Bolla
Dc-Dc Buck-Boost Converter For Energy Harvesting From Exercise Equipment, David T. Bolla
Electrical Engineering
This senior project helps harvest the excess energy that exercise equipment generates. Sustainable energy acts as the main target for this project, and it attempts this through reusing the energy created when exercising on elliptical machines. An elliptical machine outputs voltages between approximately 5V and 60V, and a micro-inverter requires an input voltage of about 36V. This DC-DC converter takes the variable output voltage of an elliptical machine and brings it to approximately 36V. Re-purposing the excess energy an elliptical user creates for the grid provides a sustainable alternative to dissipating the energy as heat. This project, along with other …
Industry Automation And Controls Lab, Nadir Ilyas Khan, Michael Campos, Samantha Bituen
Industry Automation And Controls Lab, Nadir Ilyas Khan, Michael Campos, Samantha Bituen
Electrical Engineering
This work details our efforts to build a new industrial automation lab for the Cal Poly San Luis Obispo Electrical Engineering department from the ground up. Thanks to a donation of Modicon M580 programmable logic controllers (PLCs) from Schneider Electric, we built a lab hardware layout to support a learning environment for students. The Electrical Engineering department currently doesn’t offer any courses for students to learn about automation in topics more closely following the topics learned in their curriculum. It will be beneficial for the school and the students to have graduates in the major with some knowledge of controls …
Portable Electrocardiogram Device And Signal Processing Design, Ryan F. Blaalid
Portable Electrocardiogram Device And Signal Processing Design, Ryan F. Blaalid
Electrical Engineering
Full 12-lead electrocardiogram (ECG) measurements require inconvenient and time consuming adhesive electrode placement. This project proposes a design for a Bluetooth based ECG for remote patient measurement. The device is designed to measure up to 6-leads and utilizes 5 dry (non-adhesive) electrodes to accomplish this. The device delivers the ECG data to the user’s mobile smart phone and can then be sent to the patient’s doctor for analysis. Since the contact of the dry electrodes to the skin is not perfect, low-frequency noise called baseline wandering is introduced. A signal processing technique borrowed from image processing called morphological filtering is …
Cp Ewheel, Garrett Maxon, Adam Berg, Logan Griffith, Jacob Butler, Alexander Evans
Cp Ewheel, Garrett Maxon, Adam Berg, Logan Griffith, Jacob Butler, Alexander Evans
Electrical Engineering
With an increasing demand for environmentally friendly transportation options, the bike market is larger than ever. According to bikeleague.org, from 2005 to 2013, the number of commuters using bikes has grown by 62%, and continues to rise. Regardless, commute time remains a barrier for many prospective users. Traditional bikes are useful in scenarios where the user only needs to travel a short distance. Electric bikes allow individuals to travel to farther destinations quicker, and with less effort. However, most electric bikes are rather expensive, typically ranging in price from one thousand to ten thousand dollars. Additionally, because the bike, motor, …
Spread Spectrum Buck Converter, Summer Elise Rutherford, Kyle Brandon Halloran, Brian Taylor Arbiv
Spread Spectrum Buck Converter, Summer Elise Rutherford, Kyle Brandon Halloran, Brian Taylor Arbiv
Electrical Engineering
Electromagnetic interference (EMI) is an issue prevalent to DC-DC converters. When a system doesn’t effectively filter out external noise or signals, these signals can cause disturbances to the system at large. The switching technology of DC-DC converters (PWM in particular), lends the system susceptible to EMI because there is a prevalent peaks at the switching frequency, meaning any external signals will not be effectively attenuated at this frequency. This can cause significant issues at the input bus of the DC-DC converters because this bus is likely the input of a multitude of devices; the EMI susceptibility caused by switching technology …
Frequency Modulation Integrated Circuit For Radars, Jade S. Visutsiaz, Hue Thu Doung
Frequency Modulation Integrated Circuit For Radars, Jade S. Visutsiaz, Hue Thu Doung
Electrical Engineering
Frequency-modulated continuous wave radars are a type of radar capable of measuring the distance to a stationary object or velocity of a moving object by radiating a continuous transmission of a signal that linearly sweeps its frequency repeatedly between two set frequencies. Frequency-modulated continuous wave radar signals are generated by a high frequency voltage-controlled oscillator or digital-to-analog converter. This project is an integrated circuit that produces the frequency-modulated signal on a single chip in the analog realm. The circuit was designed using Cadence Virtuoso with TSMC 180 nm process technology model. The generated signal is intended for use with ultra-wideband …
Sensor Systems For Combustion Control, Aodhan Arias, Joshua Kyle Alba Wong, Joeny Zhen
Sensor Systems For Combustion Control, Aodhan Arias, Joshua Kyle Alba Wong, Joeny Zhen
Electrical Engineering
This project is the first iteration of a larger multi-year project working towards utilizing ammonia (NH3) as an alternative fuel. The purpose of this iteration is a proof of concept for the creation of a control loop that can measure oxygen levels in a system and control the flow rates of nitrogen and oxygen in order to maintain an ideal ratio metric flow to reduce the overall emissions of the system. It is the hope of this project that the concept can eventually be used to maximally reduce to the point of near complete elimination of NOx emissions …
Cal Poly Ee 518 Electric Power Protection Laboratory, Richard Terre, Vincent Tham, Austin Kurth
Cal Poly Ee 518 Electric Power Protection Laboratory, Richard Terre, Vincent Tham, Austin Kurth
Electrical Engineering
Facing a rapidly-changing power industry, the electrical engineering department at Cal Poly San Luis Obispo proposed Advanced Power Systems Initiatives to better prepare its students for entering the power industry. These initiatives call for the creation of a new laboratory curriculum that utilizes microprocessor-based relays to reinforce the fundamental concepts of power system protection.
The electric power protection laboratory (EPPL) senior project is the validation of lab manuals written for the planned EE-518 power system protections laboratory looking to be offered in Spring 2020 alongside the current lecture class under the same designation. This report evaluates the lab manual, verifies …
Underwater Remotely Operated Vehicle Controller With Pid Stability Regulation, Christian E. Aguirre
Underwater Remotely Operated Vehicle Controller With Pid Stability Regulation, Christian E. Aguirre
Electrical Engineering
The earth’s oceans and rivers remain widely unexplored. Hobbyists and companies across the globe invest money and resources into remotely operated vehicles (ROV) to further expand underwater knowledge. Each ROV includes a controller that operates motors and monitors other crucial system vitals. The ROV Controller project makes the process of designing an ROV simpler and more affordable by providing a multi-purpose programmable controller.
The ROV controller features programmable digital inputs/outputs and analog inputs. The controller processes control signals from analog joysticks, digital signals from a gyroscope and utilizes a MUX to expand the analog input capabilities of the Arduino. The …
Eeg Classification Using Residual Neural Networks, Eren Esener
Eeg Classification Using Residual Neural Networks, Eren Esener
Electrical Engineering
There is a growing desire to understand the EEG (electroencephalogram) signals related with brain activities. In order to analyze EEG signals, they first must be measured by sensors, which induces a lot of noise; then these signals are classified to understand the intended actions. In many cases a neural network is used as the algorithms for classification. A residual neural network (ResNet) is an artificial neural network (ANN) of a kind that are related with the pyramidal cells in the cerebral cortex. The goal of this work is to investigate the viability of ResNets for classifying EEG signals for hand …
Pseudo-Stereo Audio Processor, Zachariah David Bunce
Pseudo-Stereo Audio Processor, Zachariah David Bunce
Electrical Engineering
Due to both technical and resource limitations, non-professional audio production must often record with a single microphone, creating a mono audio signal. Even some originally multi-channel audio files often combine the separate channels into a single channel to save memory. However, this channel limitation makes any music held within the audio duller during listening. The Pseudo-Stereo Audio Processor remedies this situation, introducing a quadrature phase shift onto a given single-channel audio signal, producing multiple phase shifted output signals. These separate fixed-phase output signals are then recombined to produce a variable phase difference, emulated two-channel version of the input signal, allowing …
Apollo Photovoltaic Overview And Assessment, Andrew S. Hollis, James P. Tran, Andes Le, Regita Soetandar
Apollo Photovoltaic Overview And Assessment, Andrew S. Hollis, James P. Tran, Andes Le, Regita Soetandar
Electrical Engineering
This senior project aims to take the various data sheets provided to us by PIVVIR Solar, the organization in charge of Apollo photovoltaic power plant, and perform an overall assessment as well as condensing the information into a more digestible and concise document. Currently, the documents provided to us by PIVVIR Solar are scattered and disorganized. Our goal is to take what we understand about photovoltaic power plants and combine it with the Apollo plant’s datasheets and summarize everything into one focused document that more readers can understand.
Human Sensing Expansion For A Rolling Robot, Eric Hanson
Human Sensing Expansion For A Rolling Robot, Eric Hanson
Electrical Engineering
For the past twenty years, fans of the Star Wars movies have been building their own replica robots or “droids” that they fell in love with on the big screen. This project takes an existing design for the BB-8 droid and integrates sensors that can detect people and then interact with them. This design uses six IR sensors and one main 8x8 IR sensor grid to be able to detect the closest person and turn BB- 8’s dome towards them as though they are looking at them.
Dc-Dc Converter For Electric Vehicle, Jason Y. Zhou, Nicholas James Mah
Dc-Dc Converter For Electric Vehicle, Jason Y. Zhou, Nicholas James Mah
Electrical Engineering
In this work, a DC-DC converter is designed for an electric vehicle. The DC-DC converter is designed to provide 500W with a 200-400V input and a 12-15V adjustable output. Electric vehicle sales are beginning to increase in popularity and the need for DC-DC converters to siphon power from the tractive system is not yet fully satisfied, especially for single-seater class vehicles. Additionally, improving performance in efficiency without sacrificing wide input voltage range can benefit future DC-DC converter designs. In the end, a forward active clamp DC-DC converter is designed and tested. Additionally, spreadsheet calculators, LTSpice simulations, and Matlab scripts were …
Pv Hybrid Inverter And Bess, Jacob Sussex, William Dresser, Owen Mckenzie, Jonathan Wharton, Derek Seaman
Pv Hybrid Inverter And Bess, Jacob Sussex, William Dresser, Owen Mckenzie, Jonathan Wharton, Derek Seaman
Electrical Engineering
The storage of energy from renewable sources such as photovoltaic based systems is a growing market, with 36 MWh of storage installed in Q1 of 2018. A report from EnergySage earlier this year states that in 2017, 74% of residential solar owners were also interested in energy storage systems. Mainstream systems like Tesla’s Powerwall are competing with other lithium-ion based storage systems from a wide number of providers on the market today. Short term and long term data collection on a system like this could be useful in designing future systems which perform better than the current market offerings. This …
Alzheimer’S Disease Detection Using Convolutional Neural Netowork & Wavelets, Ean Hendrickson, Gabriel Amancio, Chloe Eusbio, Kaioli Bessert
Alzheimer’S Disease Detection Using Convolutional Neural Netowork & Wavelets, Ean Hendrickson, Gabriel Amancio, Chloe Eusbio, Kaioli Bessert
Electrical Engineering
It is estimated that 5.7 million people in the United States have Alzheimer’s dementia, including about 1 in 10 people above the age of 65. Alzheimer’s disease detection can help doctors to diagnose patients earlier and help them with preventative, proactive treatment. In this project, we attempt to use two different methods to analyze MRI brain images for Alzheimer’s disease detection, one with convolutional neural network and deep learning algorithm, and the other one with discrete wavelet transform. Computer simulation results are presented in the report.
Usb-C Power Adapter For Dc House Project, Tyler G. Starr, Ezzeddeen Gazali
Usb-C Power Adapter For Dc House Project, Tyler G. Starr, Ezzeddeen Gazali
Electrical Engineering
Despite the importance of electricity and the impact it has on our daily lives, many people around the world still live without this essential utility today. According to the International Energy Agency (IEA), approximately 1.1 billion people in the world did not have access to electricity in 2017. The DC House Project at Cal Poly aims to provide electricity to people living in rural areas by directly utilizing DC energy generated from renewable or human powered sources without the need for DC-AC conversions. However, one significant issue is the lack of a standardized DC wall socket. Standards for AC wall …
Microgrid Renewable Energy Integration, Do Quang Thanh Vo
Microgrid Renewable Energy Integration, Do Quang Thanh Vo
Electrical Engineering
The Microgrid is a small-scale electrical system that is designed to give Cal Poly students hands-on experience on power generation, system protection, distribution, and automation that would otherwise be very difficult to experiment in a large-scale model.
To closely replicate the modern electrical grid, a renewable energy source shall be added to the Microgrid in conjunction with the existing synchronous generators. Electrical engineering student, Virginia Yan initiated this effort, namely Grid-Tied Solar System project [1], by designing and constructing a set of solar panels and microinverter for future connection to the Microgrid. The scope of Virginia’s project was, however, limited …