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The EXER-STATION “Concept”. Group members: Tarafa M. Al-Awaj Bichar Myrtil Project advisor: Dr. Marshall Summar. Concept?. Project 100% operational… Project meets 100% of criteria… Project not yet ready for market production. Why did this happen? 1 st Project. Lack of resources: Time

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the exer station concept

TheEXER-STATION“Concept”

Group members:

Tarafa M. Al-Awaj

Bichar Myrtil

Project advisor:

Dr. Marshall Summar

concept
Concept?
  • Project 100% operational…
  • Project meets 100% of criteria…
  • Project not yet ready for market production.

Why did this happen?

  • 1st Project.
  • Lack of resources:
    • Time
    • Money
  • More detailed explanation will be given later...
dr marshall summar
Dr. Marshall Summar
  • Associate Professor of Pediatrics at Vanderbilt.
  • Associate Professor of Molecular Physiology & Biophysics at Vanderbilt.
  • Met in November of 2003.
  • Interested in helping children (ages 8-18) with the genetic disease PKU.
  • We gladly joined him on this mission.
phenylketonuria pku
Phenylketonuria (PKU)
  • Genetic disorder characterized by he absence or deficiency of an enzyme that is responsible for processing the essential amino acid phenylalanine.
  • Abnormal phenylalanine accumulation in the blood is toxic to brain tissue.
phenylketonuria pku1
Phenylketonuria (PKU)
  • It is estimated that PKU occurs in one in 20,000 newborns in the United States.
  • Equally frequent in males and females.
  • ≈ 27,200 individuals in the USA.
pku effects
PKU Effects

Without treatment, most infants with PKU develop:

  • Mental retardation (IQ < 80), and additional neurological symptoms…
    • which lead to introverted children.
  • A low metabolism…
    • which leads to overweight, even obese children.
pku children
PKU Children
  • Spend almost all and any time available playing video games.
  • Get little or no exercise, day in day out.

Compound problems and lead to deterioration of their general health and quality of life.

other pertinent factors
Other Pertinent Factors

A large portion of PKU children share these factors in common:

  • Some physical limitations.
  • Lower socio-economic background (limited financial resources).
  • Parents low in motivation.
  • Other limited resources (e.g. education).
the bigger issue
The Bigger Issue

"We have noticed that children in America are tending more toward obesity [& less general fitness] than in decades past; Part of it is due to sedentary lifestyles that kids are getting into. Rather than run in the woods, they\'ve got Game Boy, Nintendo and television."

- Discovery_Channel.com/Health

Dec 2003

alternate solutions
Alternate Solutions
  • DRUG ADMINSTRATION (e.g., Amphetamines)
    • Adverse Psychological Effect/Damage.
    • Possibly Addictive (dependency).
  • PERSONAL TRAINER/THERAPIST
    • Expensive (cost factor).
    • Lack of Independent Motivation.
ideal solution
Ideal Solution

From the IWB ideation process:

Find an alternative way to obtain (exercise) that offers the following: eliminates, reduces, or prevents (weak muscles), (obesity) and (health problems), and is not influenced by (Addiction to video games) and (PKU).

solution
Solution
  • Motivate to independently exercise.
  • Incorporate aerobic physical activity into video game play.
  • Substitute some “finger-activated” commands with “leg-activated” ones.
  • Allow patient to remain seated.
  • Aid in improving patient health and morale.

_______________________________________

EXER-STATION

slide13
Aims

1 hour of Exer-Station =

20 minute Brisk Walk

OR

4 minute Sprint

OR

Approximately 86 Calories!

design of exer station
Design of EXER-STATION

Consists of 3 main components:

  • Device:
      • Wheel
      • Trainer:
        • Structure
        • Resistance
      • Generator
  • Circuit
  • Controller
slide15

Controller

  • Up/Down commands of the Left analog stick will be replaced by pedal motion.
  • All other commands will remain intact and function through hand controller.
  • Each analog stick controlled by two 10K pots.
  • 3 pins of pot are: i) Ground, ii) Signal, iii) 3.44V source.
  • At Center, signal = 1.72V, (range 1.35V - 2.05V)
  • At max Up, signal = 3.15V
  • At max Down, signal = .5V
device wheel
Device: Wheel
  • United 24-inch Adult Trainer, Item # UNU24AT-27.
  • diameter = 24”
  • crank arm length = 6”
slide17

Device: Trainer & Resistance

  • Volare Mag Trainer w/Elastogel and Remote.
  • Magnetic resistance unit with 5 different levels of adjustment.
  • Resistance shaft diameter = 1.25”
  • w = 27 lbs
  • d1 = 14”
  • d2 = 17”
  • h = 30”
  • l1 = 2”
  • l2 = 8”
  • h = 30”
  • c = 17.5”
slide18

Device: DC Generator

  • RadioShack hobby motor, model# 273-255.
  • 12V DC motor.
  • 1.3A @ 11,500 rpm.
  • Produces 350mV per 100 rpm.
  • Coupled with shaft of resistance.

Output from generator will be smoothed, summed, and scaled via the circuit to produce a DC current from 0.5V to 3.15V for maximum down/up motion of left analog stick, respectively.

additional parameters
Additional Parameters
  • Pedaling speed Range: 40rpm – 120rpm
    • Below 40:- Strains joints
    • Above 120:- Efficiency falls off
  • Ratio of wheel to resistance shaft rpm :

π * dwheel : π * drs

24 : 1.25

20 : 1

  • Actual ratio 18-14:1 (due to frictional slips).
results
Results
  • Kids play ≈ 6 hours/day
  • Use ≈ 100 Calories/hour
  • Expend ≈ 600 Calories/day!!!
game play
Game Play
  • Design and Tested To Work Best w/ Motion Games such as 007 Agent under fire.
  • Or Simple Maneuver such as Pac-Man
work remaining
Work Remaining
  • Safety Issues
  • Aesthetics
  • Perf-boarding
  • Hardwiring
  • Playing, playing, and more playing.
budget
BUDGET
  • $400 Initial Budget (from Dr. Summar)
    • Playstation II Console ($200)
    • Multiple Controllers ($75)
    • Three Games ($150)
  • Additional $350 Requested (from Dr. King’s Grant)
    • Leg Activated Elements
      • Unicycle ($125)
      • Mag. Trainer ($150)
      • DC Generator ($25)
      • Wires
      • LEDs
      • Chips
      • Circuit Board
  • Decorative Design/ Aesthetics
  • Miscellaneous
concept to market
Concept to Market

Issues to be addressed first:

  • Size
  • Adjustability
  • Power source
  • Price
market potential
MARKET POTENTIAL
  • Ages 8+
  • Hospital Patients
  • Obese Individuals
  • Individuals concerned about fitness
  • General Video Game Audience
slide29

RESOURCES

ADVISORS

  • Paul H. King, PhD., P.E.:

-Associate Professor of Biomedical Engineering at Vanderbilt.

-Associate Professor of Mechanical Engineering at Vanderbilt.

-Associate Professor of Anesthesiology at Vanderbilt.

-Instructor of the senior Biomedical Engineering design course at Vanderbilt.

  • Marshall Summar, M.D.:

-Associate Professor of Pediatrics at Vanderbilt.

-Associate Professor of Molecular Physiology & Biophysics at Vanderbilt.

VANDERBILT UNIVERSITY

-lab space

-machine shop

-research facilities

-software

-help purchase necessary tools/equipment

SECOND BASE

-back-up location when primary lab not available

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