iBOT Weight Sensor Final Report Presentation - PowerPoint PPT Presentation

Loading...

PPT – iBOT Weight Sensor Final Report Presentation PowerPoint presentation | free to download - id: 1a563b-ZDc1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

iBOT Weight Sensor Final Report Presentation

Description:

... Unlikely Moderate Don't drive recklessly Minimal Remote Unlikely Low ... tasks motor vehicle movement Driving recklessly can increase instability Serious ... – PowerPoint PPT presentation

Number of Views:89
Avg rating:3.0/5.0
Slides: 24
Provided by: cec2
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: iBOT Weight Sensor Final Report Presentation


1
iBOT Weight SensorFinal Report Presentation
  • BME 401 Design
  • Mentor Dr. David Gray
  • Group Members
  • James Hubenschmidt, Vijay Jayaraman, and Girish
    Murthy

2
Project Review
  • What is the iBOT?
  • Need a sensor that detects when the iBOT has
    exceeded the weight capacity to perform
  • Design a system that indicates to the user that
    there is excess weight on the iBOT

3
Design Requirements
  • Alarms user when iBOT is unsafe
  • Does not interfere with current iBOT functions
  • Light weight
  • Reasonably priced
  • Does not affect users comfort

4
Chosen Design Concept
  • The 5-Point Weight Sensor
  • More accurate measurement of weight distribution

5
Design Components I
  • Model 53 Load Cells
  • Need five of these
  • Compression sensor
  • Light weight
  • Low cost

6
Design Components II
  • Aluminum Sheet
  • Scaled to fit seat cushion
  • Place below seat cushion
  • Flat surface
  • Light weight

7
Design Components III
  • Summing Junction Box
  • Input five load cell signals
  • Two outputs of one signal
  • Low weight
  • Easy installation

8
Design Components IV
  • Load Cell Display
  • Visual reading of weight
  • Compact and light weight
  • Accurate

9
Design Components V
  • Alarm System
  • Provides warning for excess weight
  • Compact size
  • Quick response

10
Design Components VI
  • Steel holder
  • Provides place to store digital display
  • Easy attachment to right armrest

11
CAD Drawings I
12
CAD Drawings II
13
Drawing III
14
Analytical Calculations
  • Weight Equations
  • Wmg
  • Max m is 113.4 kg (250 lb)
  • Error Calculations
  • Percent Error x Weight Reading
  • 0.25 error per load cell
  • 0.1 error for load cell display

15
Power Consumption
  • Load cell display
  • 9V battery
  • 60 hours
  • Alarm
  • 12 Volts DC/100 mA maximum

16
Safety Analysis
  • all users all tasks entanglement Wire
    entanglement connecting the load cells to the
    summing box and the summing box to the digital
    display Slight Occasional Unlikely Moderate Carefu
    lly route wires Slight Remote Unlikely Low Everyon
    e On-going
  • all users all tasks impact Impact can cause
    damage to the alarm, digital display, and the
    summing box Slight Remote Unlikely Low Minimize
    impact Minimal None Unlikely Low Everyone On-going
  • all users all tasks wear Attachments for the
    digital display and alarm can wear off due to
    excess vibration Slight Remote Unlikely Low Use
    durable attachments Minimal None Unlikely Low Ever
    yone TBD
  • all users all tasks fatigue Battery life,
    aluminum plate can break Slight Remote Unlikely Lo
    w Get long-lasting batteries Minimal None Unlikely
    Low Everyone TBD
  • all users all tasks insulation Insulation can be
    a problem if wires not properly
    attached Slight Remote Unlikely Low Place wires
    properly Minimal Remote Unlikely Low Everyone On-g
    oing
  • all users all tasks electrostatic Charge can
    build up on the iBOT Slight Remote Unlikely Low Sh
    ield system from charge Minimal Remote Unlikely Lo
    w Everyone In-process
  • all users all tasks physiological effects Too
    much weight from the person can damage aluminum
    plate Slight Remote Unlikely Low Don't let user
    put to much weight on iBOT Minimal Remote Unlikely
    Low Everyone On-going
  • all users all tasks equipment damage Reckless
    driving and excess weight can damage parts of
    system Serious Remote Unlikely Moderate Don't
    drive recklessly Minimal Remote Unlikely Low Every
    one On-going
  • all users all tasks motor vehicle
    movement Driving recklessly can increase
    instability Serious Remote Unlikely Moderate Caref
    ul driving Minimal Remote Unlikely Low Everyone On
    -going
  • all users all tasks excessive weight Too much
    weight can increase instability Slight Remote Unli
    kely Low Not too much weight on
    iBOT Minimal Remote Unlikely Low Everyone Complete
  • all users all tasks instability Balance mode is
    not very stable from side-to-side
    impact Slight Remote Unlikely Low Avoid
    side-to-side impact Minimal Remote Unlikely Low Ev
    eryone In-process
  • all users all tasks loss of balance Too much
    weight on one side from the products can disrupt
    balance Serious Remote Unlikely Moderate Properly
    place products onto iBOT Minimal Remote Unlikely L
    ow Everyone In-process

17
Material Information I
  • Load Cells
  • 360 per load cell
  • Total with shipping and handling is 1804.96
  • Honeywell Sensotec
  • About 5 working days to ship
  • Aluminum Sheet
  • 36.83 including shipping and handling
  • Metals Depot
  • Two working days to ship

18
Materials Information II
  • Summing Box
  • 406 including shipping and handling
  • Tare Inc.
  • Five working days to ship
  • Digital Display
  • 500 including shipping and handling
  • Transducer Techniques
  • Five working days to ship

19
Materials Information III
  • Alarm System
  • 205 including shipping and handling
  • Transducer Techniques
  • Five working days to ship
  • Steel holder
  • 19.70 including shipping and handling
  • Unimax Supply Co.
  • Five working days to ship

20
Manufacturing Process
  • Installation done by ourselves
  • One week to complete process
  • About five weekdays for parts to arrive
  • One day to install and test parts
  • Cost of installation roughly 105
  • Total cost to consumer is 3067.49

21
Conclusions
  • We felt we were successful in designing a weight
    sensor for the iBOT
  • Future Considerations
  • Would have looked more into pressure mats (more
    cost effective)

22
Acknowledgements
  • Dr. David Gray
  • Kerri Morgan
  • Professor Klaesner

23
Questions
About PowerShow.com