Household Water Monitoring System known as “The Water Widget” · 2020-03-03 · Household Water...
Transcript of Household Water Monitoring System known as “The Water Widget” · 2020-03-03 · Household Water...
Household Water Monitoring System known as
“The Water Widget”
David Carpency (ENGR), Ian de Vlaming (MEEN), Lucas
DeWitt (CECN), Kyle Fisher (CECN), Josh Hiatt (CHEN), Cody
Mask (MEEN), Jim McCabe (MEEN), Chiny Okafor (CHEN),
Josh Ruff (ECEN), Lisa Smith (ECEN), Kyle Sparrow (ECEN),
Minda Wei (ECEN), Josh Zschiesche (CEEN)
AggiE Challenge
Department of Electrical and Computer Engineering
Texas A&M University, College Station, TX 77843-311
Faculty Members: J. F. Chamberland, G. H. Huff
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Household Water Monitoring System known as “The Water Widget”
Introduction
Our challenge
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This semester we set out to design all the induvial parts to achieve the a water monitoring system for home faucets.
Engineer a system-of-systems that:– Monitors water usage at all access points
– Senses impurities and water quality
– Provides visualization tools for mobile devices
– Links this information to social media.
Project Goals
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Household Water Monitoring System known as “The Water Widget”
Introduction
Household Water Monitoring System known as “The Water Widget”
Propeller Alternatives Considered
Pelton Wheel and Kaplan Wheel
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Household Water Monitoring System known as “The Water Widget”
Outlying factors– Used in high head and low flow
– Angular flow
– Variable angle on the cups
– Variable number of cups
Needed modifications – Compressed and redirected flow
– Flow angled properly
– Support added in the design for increased pressure
– Housing
Propeller Alternatives Considered
Pelton wheel
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Household Water Monitoring System known as “The Water Widget”
Outlying factors– Can be used in low head
environments
– Has an axial flow that does not hamper water flow
– Blades are variable
Needed modifications– Added magnets
– Possible patent
– Contained housing
Propeller Alternatives Considered
Kaplan Wheel
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Household Water Monitoring System known as “The Water Widget”
Goal: Find optimal propeller blade angle and flow rate
Method: – Flow rate is varied from .00035
to .00015 m3/s
– Blade angle is varied from 105 to 165 degrees
– Torque imparted in blade is measured
Propeller Alternatives Considered
Flow Simulations
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Household Water Monitoring System known as “The Water Widget”
The conductivity of water correlates to the amount of dissolved solids in solution.– Pure water is not very conductive;
dissolved solids like salts, electrolytes, etc. provide most of the conductivity.
Hardness is related to the amounts of Calcium and Magnesium ions in solution
Water Analysis
Conductivity of Water
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Picture from sciencedirect.com
Household Water Monitoring System known as “The Water Widget”
A know voltage is applied to the water and then the voltage is measured after the current passes through the water
The change in the voltage is proportional to the conductivity of the water and therefor its salt content
Water Analysis
Salinity Sensor
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Household Water Monitoring System known as “The Water Widget”
RGB LED light detection: changes in the refraction of water can be correlated to the amount of dissolved solids– More dissolved solids include mean more particles that the light
can bounce off of
Potential: Can use a similar method to detect the color of a water sample, which could then be correlated to dissolved solid concentrations
Water Analysis
Other Electrical Measurements
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Household Water Monitoring System known as “The Water Widget”
We used the Teensy++ 2.0 Microcontroller to take in sensor data and transmit the data over the Bluetooth module.
The 2++ specifically was used because the logical voltage level required to power the sensor is 5V and the 2++ can provide this.
In addition, the 2++ performed minor data formatting functions
Hardware and Sensors
Teensy++2.0
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Picture from pjrc.com
Household Water Monitoring System known as “The Water Widget”
Contains a water rotor and hall-effect sensor.
When water turns the rotor and the sensor is powered, the hall-effect sensor outputs a pulse signal.
Pulse signal corresponds to the rate of flow.
Hardware and Sensors
Water Flow Sensor
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Picture From seedstudio.com
Household Water Monitoring System known as “The Water Widget”
Uses UART serial transmission to communicate with microcontroller.
Sends byte arrays from microcontroller to a server for data to be processed.
Hardware and Sensors
Blue Tooth Module
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Picture from miniinthebox.com
Household Water Monitoring System known as “The Water Widget”
JSON serializes objects in string format and has implementations across a wide array of platforms, making it perfect for communicating between an Arduino, server and an Android.
Data Acquisition
JSON Serialization
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The data which was taken into the microcontroller is formatted using a serialization method called JSON.
Picture from json.org
Household Water Monitoring System known as “The Water Widget”
Data Acquisition
Data Path
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Water
Sensor
Teensy Server
Bluetooth
Module
Collected
Data
Download
Data and
Serialize
with JSON
Process
Data
Android
App
Connected
via WiFi
Household Water Monitoring System known as “The Water Widget”
Utilizes SQLite database stored locally on Android
Stores floats into SQLite database
Android version 5.1
Visualization
Android Application
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Acceleration SQLite Test App
Household Water Monitoring System known as “The Water Widget”
Capable of low power Bluetooth transmissions with very little overhead power usage
Requires Embedded programming but the potential benefits are much better than those offered by traditional DIY chips
Visualization
Nordic
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Picture from mouser.com
Household Water Monitoring System known as “The Water Widget”
The project will continue next semester to:– Further develop the sensors for water quality
– Finish setting up the Nordic Platform
– Integrate each induvial component into one device
– Test the entire device
Future Work
Next Semester’s goals
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