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J.U.I.C.Y.

ELEC 4000 Design Project

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Team Members:

Marco Zuniga (Team Captain) Kaidi Ding LaShae Timmerman

Joe Driscoll Viraj Patel

Cole Graviett Matthew Cather

Presenter: Marco

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Project Description

Our team’s objective is to create a motion alarm device that can recognize a specific change in movement (acceleration) and send an alarm signal to a synchronized device. The device will be dedicated towards identifying when a child has fallen into a pool based off of the intensity of the waves.

Presenter: Marco

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Project Motivation

  • Drowning is the leading cause of death in children under age 5
    • approximately 350 deaths per year
  • Additional 2,200 children treated annually for submersion accidents
  • 5,000 family pets drown each year
  • Drowning is the leading cause of injury or death for seizure sufferers

Presenter: Marco

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Alternate Use

  • Tsunami and other sea-disaster warning
    • If our alarm system is accurate and collects enough data, we can use it to detect special fluctuations in the sea level to give early warning of a tsunami

Presenter: Kaidi

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Phase 1 Requirements

  • Float/waterproof
  • Solar panel needs to charge battery
  • Detect Waves
  • Determine if alarm should sound from size of waves
  • Signal alarm if waves are right size

Presenter: Kaidi

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Necessary Parts

  • Microcontroller (Raspberry Pi)
  • Accelerometer
  • Battery
  • Solar Panel
  • 3D-Printer Shell

Presenter: Kaidi

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Microcontroller

Raspberry Pi

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  • Wi-Fi enabled
  • Multiple OS choices
    • Raspbian, various Linux distributions
    • Python support

Presenter: Marco

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MPU (Motion Processing Unit)

Sparkfun IMU Breakout MPU-9250 Board

  • Fits budget ($15)

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  • Multiple sensing ranges

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  • Includes 3-axis gyroscope

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Presenter: Marco

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Powering The Raspberry Pi

  • Solar Power

Components:

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2W,6V panel

DC/Li poly charger

LiPoly Battery

Powerboost 500

(3.7V, 2500 mAH)

(5V @ 500 mA)

Presenter: Viraj

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Hardware Connections for Power Supply

Presenter: Viraj

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3D-Printed Shell

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    • Small base with large outriggers
    • Upside Down Teardrop
    • Circular

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Presenter: Cole

Shape

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3D-Printing Materials

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ABS

SLA

PETG

PLA

PVA

Pros

Very sturdy

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Long lifespan

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Easy to process

Very economic

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High wear resistance

Recyclable

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Rugged

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Exceptional layer adhesion

Environmentally friendly

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Easy to print with

Good durability

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Biodegradable

Cons

Damages in direct sunlight

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Not biodegradable

More expensive

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Not suitable for outdoor use

Can be sticky

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Less resistant to scratches

Softens when exposed to water

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Can deform from heat

Water soluble

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Expensive

Presenter: Cole

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Radio vs. Bluetooth vs. Wifi

Pros

Cons

Pros

Cons

Pros

Cons

Large range

Limited frequencies

Low Power Consumption

Smaller range

Longer range

High Power Consumption

Low Cost

Must meet standards

(CFR 47.15)

Mobile device integration

Limited Number of Users

More frequency options

Assumes wifi is available in use case

Radio

Bluetooth

Wifi

Presenter: Cole

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Device Management and Configuration

Direct Access

Remote Access

  • Reliable
  • Simple
  • Low Overhead
  • Not Easy to waterproof
  • Serial/USB Port
  • Requires an antenna
  • More Overhead
  • Utilize a mobile phone application
  • Easy to Waterproof

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Presenter: Cole

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Project Budget

  • (1) Solar Panel: $29.00
  • (1) DC/Lithium-poly Charger: $17.50
  • (1) Lithium-poly Battery: $14.95
  • (1) Powerboost 500: $10.00
  • (1) Accelerometer: $15.00
  • (1) Raspberry Pi: $35.00
  • 3D - Printing Material: $15.00 - $60.00

Total Estimated Cost: $136.45 - $181.45

Presenter: LaShae

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Testing

Testing based on two established reports

  • An Evaluation of Swimming Pool Alarms�(Consumer Product Safety Commission [1])
  • Standard Safety Specification for Residential Pool Alarms�(ASTM International [2])

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Presenter: LaShae

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Testing Procedure

Detection:

  1. Determine the splash created by 16lb weight
  2. Test perceptibility of accelerometers
  3. Calculate maximum detection distance in multiple settings
  4. Detect 100% of viable disturbances and 0% of false alarms

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Notification:

  1. Manually generate alarm
  2. Alarm sounds for each wave detection
  3. Alarm successfully reset after notification

Presenter: LaShae

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Consumer Product Safety Commission

  • 2 gallon water jugs equivalent to 12-15 month child
  • 3 gallon water jugs equivalent to 42-54 month child
  • Tested worst case scenario (across pool)
  • 18 - 20 feet away
  • Test multiple pool sizes

Presenter: Matthew

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Consumer Product Safety Commission

Presenter: Matthew

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ASTM International

  • 20 lb water weight
  • Three vertical drop tests
  • Two horizontal drop tests
  • 16-by-32 ft test pool
  • Does not specify sensor location

Presenter: Matthew

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ASTM International

Presenter: Matthew

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Phase 2 - Options

  • First response system
    • Autonomous deployment of inflation/rescue devices
    • Mechanism for lifting objects out of water
    • Networking/communication interfaces for extensibility
  • Sensor fusion/integration
    • Combine/replace accelerometer with other sensors
      • Sonar, LiDAR
      • Thermal/optical cameras
    • Add sensors for other data
      • Water condition
      • Temperature/weather
      • Ecological analysis (non-pool environment)

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Presenter: Joe

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Detection Methods

  • Strong need for robust, dependable detection
  • Several modern techniques in literature
    • Various DSP techniques
      • Compressed sensing
      • Adaptive filter design
    • Anomaly detection methods
      • Several classes of neural networks - replicator, siamese, recurrent, etc.
      • Density methods - clustering, nearest-neighbor, etc.
      • Optimization and artificial intelligence
        • SVM’s, Markov/Bayesian models, fuzzy logic, ensemble architectures
  • Embedded processor constraints/considerations

Presenter: Joe

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Tentative Schedule

Presenter: Matthew

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Disposition

We have all agreed to donate our widget to the university for the purpose of inspiring a new age of engineering.

Presenter: Marco

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Conclusion

Our team should have a functioning motion alarm device to demonstrate at the senior design fair. If time permits, our device will include ideas from Phase 2.

Presenter: Marco

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References

[1] Author Unknown. “Drowning." Centers for Disease Control and Prevention. 15 September 2017.

https://www.cdc.gov/healthcommunication/toolstemplates/entertainmented/tips/Drowning.html

[2] Author Unknown. “Unintentional Drowning: Get the Facts." Centers for Disease Control and

Prevention. 28 April 2016. https://www.cdc.gov/homeandrecreationalsafety/water-safety/waterinjuries-

factsheet.html

[3] Author Unknown. “Risk of Pet Drowning on the Rise!" petplace. 10 December 2014.

https://www.petplace.com/article/dogs/pet-health/risk-of-pet-drowning-on-the-rise/

[4] Author Unknown. “A beginner's guide to accelerometers" Dimension Engineering. Date Unknown.

https://www.dimensionengineering.com/info/accelerometers

[5] Author Unknown. Specifications Raspberry Pi 3. Date Unknown.

https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus/

[6] Tony Rogers. “Everything You Need to Know About ABS Plastic." Creative Mechanisms. 13 July 2015.

https://www.creativemechanisms.com/blog/everything-you-need-to-know-about-abs-plastic

[7] Adam Fasnacht. “SLA vs. Polyjet: What You Need to Know." CADimensions. 11 January 2018.

https://www.cadimensions.com/blog/sla-vs-polyjet-need-know/

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