Project

# Title Team Members TA Documents Sponsor
30 Power Outlet Quality and Submeter System
Nicole Viz
Roshan Mahesh
Soham Manjrekar
Surya Vasanth design_document1.pdf
design_document2.pdf
final_paper1.pdf
presentation1.pdf
proposal1.pdf
proposal2.pdf
video1.mov
video2.mov
# Power Outlet Quality and Submeter System Project

Team Members:
- Nicole Viz (nviz2)
- Soham Manjrekar (sohammm2)
- Roshan Mahesh (roshanm2)

# Problem

In the rapidly evolving field of power electronics and energy technologies, maintaining consistent and high-quality power distribution and energy usage is critical for residential and commercial buildings. Using submeters can help create energy savings, lower operating costs, increase building efficiency and reliability, and improve occupant comfort. Devices today have several drawbacks, however. They can be cost-inefficient, complex to operate and to read, and they may lack real-time insights. Additionally, they may not employ sufficient power quality monitoring. These shortcomings can lead to difficulty in meeting recent sustainability efforts, and as such, an innovative solution is needed.

# Solution

For our project, we’d like to design and construct an improved device that monitors power quality and acts as a submeter to its loads – a device that is cost-effective, has high-fidelity data acquisition, and operates with an intuitive user interface LCD screen. Our project will solve the problems listed above by combining a power quality monitor along with a submeter in a cost-effective manner that stores real-time data and loads the data to a database that can be accessed through a website. More detailed specifications are presented below. We’ve divided our project into the following subsystems: Microcontroller/Software, Sensors and ICs, and Power. Note: We’ve looked into the work of a group who did a similar project last year and discussed some of the issues they faced; portions of this work will hopefully build on that and improve upon them.

# Solution Components

- Microcontroller/Software
1. ESP-32 or similar
- Offers DSP
- WiFi and Bluetooth Connectivity
- Allows for expansion GPIO to add additional storage
- Low power draw
2. SD Card Module
- To save data in the event of power loss
3. Google Cloud hosting MySQL database or similar
- Any online cheap database management system
- Sensors and ICs
1. Voltage Sensing via Voltage Divider
2. Current Transformer (PA1005.070QNL by Pulse Electronics), measures current as well
3. ADE9153A
- Single Phase Energy Metering IC
4. ADE9430
- Power Quality Metering IC
- Power
1. 5V Li ion Battery (or can investigate other battery options if there are safety concerns with Li ion)
2. 3.3V Linear Regulator (to power PCB with IC’s and microcontroller)

# Criterion for Success

Our criterion for success is divided up into the following 5 categories: software, operation, power quality measurement, submeter measurement, and miscellaneous. These are our criteria for success:
- Software
1. Online database that holds data such as timestamp, voltage, current, power, time of harmonic disturbances/power outages/voltage changes larger than 5%
- Upload data to database every 15 minutes using WiFi/bluetooth
2. Displays waveforms of power outlet current and voltage
3. Displays whether or not there’s a power quality issue (for harmonic disturbances/power outages/voltage changes larger than 5%), the type of issue, followed by a notification
- Operation
1. Self powering our device for at least 24 hours
- Power Quality Measurement
1. Record harmonic disturbances 20 ms before and after
2. Record voltage changes larger than 5%, or power failures
3. Send this data to database when failures/disturbances occur
- Submeter Measurement
1. Measure voltage, current, power of electrical load
2. Have an LCD Screen displaying instantaneous voltage, current, power
- Miscellaneous / Stretch Goals
1. Keep construction costs as low as reasonably possible
2. Make device lean and visually tidy

Prosthetic Control Board

Caleb Albers, Daniel Lee

Prosthetic Control Board

Featured Project

Psyonic is a local start-up that has been working on a prosthetic arm with an impressive set of features as well as being affordable. The current iteration of the main hand board is functional, but has limitations in computational power as well as scalability. In lieu of this, Psyonic wishes to switch to a production-ready chip that is an improvement on the current micro controller by utilizing a more modern architecture. During this change a few new features would be added that would improve safety, allow for easier debugging, and fix some issues present in the current implementation. The board is also slated to communicate with several other boards found in the hand. Additionally we are looking at the possibility of improving the longevity of the product with methods such as conformal coating and potting.

Core Functionality:

Replace microcontroller, change connectors, and code software to send control signals to the motor drivers

Tier 1 functions:

Add additional communication interfaces (I2C), and add temperature sensor.

Tier 2 functions:

Setup framework for communication between other boards, and improve board longevity.

Overview of proposed changes by affected area:

Microcontroller/Architecture Change:

Teensy -> Production-ready chip (most likely ARM based, i.e. STM32 family of processors)

Board:

support new microcontroller, adding additional communication interfaces (I2C), change to more robust connector. (will need to design pcb for both main control as well as finger sensors)

Sensor:

Addition of a temperature sensor to provide temperature feedback to the microcontroller.

Software:

change from Arduino IDE to new toolchain. (ARM has various base libraries such as mbed and can be configured for use with eclipse to act as IDE) Lay out framework to allow communication from other boards found in other parts of the arm.