WaterMainia - University of Massachusetts Amherst

Senior Design Project: WaterMainiaDecember 5th, 2016

Midway Design Review

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WaterMainia

MichaelMoran

JonMcAvoy

Greg Boudreau

Team Manager

ProfessorHollot

Advisor

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What is the Problem?

Water Conservation Water Pipe Damage

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Our Solution - WaterMainiaSense

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Detect Alert

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Requirements Analysis: Specifications

1. Must be implemented using 3/4’’ pipe2. Water flow data is metered and recorded3. Store data for previous two years4. Display water consumption data in tables, line charts and pie

charts5. Close water main & notify owner within one minute from pipe

burst6. Alerts owner of any sized leaks7. Power < 50W8. Cost <$500 budget

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PDR Block Diagram

Android App

Flow Sensor

Rasp Pi 3 Model B Emergency

Shutoff ValveWater In

Manual OverrideWiFi

Chip

Data/Alerts Output Change Settings

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ADC Power Relay

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MDR DeliverablesG

● Goal: Have the vacation mode functionality implemented○ Investigate and if possible implement the electromagnetic flow

meter○ Investigate and if possible implement the ultrasonic flow meter○ Implement emergency shutoff system○ Have emergency shutoff alert user via an app

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Block Diagram

Android App

Flow Sensor

Rasp Pi 3 Model B Emergency

Shutoff Valve

Water In

Manual OverrideWiFi Chip

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ADCSolid State Relay

Bluetooth Chip

Plumbing Simulation

Signal Reshaping

Water Flow

Cloud Server

Data Transfer

Data Transfer Alert Message

120V from Outlet

Noisy signal created

Clean signal

3.3V

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WaterFlow Detection M

SumpPump

Electromagnetic sensor

Solenoid Valve

Ball Valve

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Power

Requirements:● Input=120V AC● ~ 12.5W for cpu● ~ 18W for motor● ~ <15W for flow monitor

(.6W for the coils)● Overall goal <50W power

consumption

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*If power fails Emergency shutoff fails in the open position and will have to be manually closed

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Ultrasonic SensorM

Complicatedbuild

Not as accurate Costly $$ Not worth

implementation + + =

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Electromagnetic Coil Design

Faraday’s Lawu =BvdMagnetic Field StrengthB=NITime Varying Voltage EquationV(t) = I(t)((wL)2+R2))½

Coil Self-InductanceL = 2�*k*N2*r2/l

B = Mag Field Strengthv = velocity of liquidd = diameter of pipeN = turnsw = angular frequencyL = Inductancer =radiusk = coeff of airl = length

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Electromagnetic SensorJ

Water Flow

Magnetic Coils Electrodes Signal

Morphing

Water flows through the

system

Coils induce voltage

between electrodes

Voltage is read

between electrodes

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Amplification and Filtering Stage

Filtering▪ 4 Stage Butterworth Filter▪ -10db Drop at 100Hz

▪ 4 RC4558P IC▪ Further Low Pass Filtering

Anything Over 10Hz▪ RC Filters

Amplification▪ Two Stage Amplification▪ 2 RC4558P IC▪ Input Impedance: 5M▪ CMRR: 90db▪ Instrumentation Amplifier

▪ 20db Gain (10x)▪ Non-Inverting Op-Amp

▪ 40 db Gain (100x)

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Voltage Difference While Opening/Closing Valve

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SoftwareG

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Data TransferG

Android App

WiFi Chip

Cloud Server

Push Notification

Download Water Flow Data

Change WaterMania Settings

Upload Water Flow Data

Change WaterMania Settings

SMS Message

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Alert and Solenoid DemonstrationM

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Android AppG

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Budget

▪ Solid State Relay - $11.28▪ MCP3008 ADC - $19.86▪ Raspberry Pi 3 SBC - $41.99▪ GPIO Expansion board - $9.90▪ 110V AC Solenoid Valve - $26.99▪ 24 AWG Magnetic Wire - $16.40▪ Power Cord - $15.64▪ Bridge Rectifier - $6.75▪ 5V Voltage regulators $6.45▪ 12V regulators $5.61▪ Transformer $16.56

Total: 177.43

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Gantt ChartJ

PDR10/21

SDP Final Report

1/25/17CDR

3/4/17

FPR4/15/17

Demo Day

4/22/17

MDR12/5/16

SDP Draft

Report12/16/1

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CDR DeliverablesG

Fully Parametrized Flow Data Data Analysis Integrated and Compacted Design

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BloopersG\M

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Thank You

Questions

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