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Strain Gauge Project. LeShaun Alexander. Problem:. Detecting and measuring flow rates of very shallow and slow moving water requires special equipment which can be very expensive. The need to measure these flow rates is relevant to creek restoration societies locally. . Characteristic Table. - PowerPoint PPT Presentation
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Strain Gauge ProjectLeShaun Alexander
Problem:• Detecting and measuring flow rates of very shallow and slow
moving water requires special equipment which can be very expensive. The need to measure these flow rates is relevant to creek restoration societies locally.
Characteristic Table
Objectives AnalysisA means to
Measure Flow Rate in Shallow
streams
Portable
Lightweight
< 5lb………………5< 10lb……..………4<15lb………..……..3< 20lb……………..2< 30lb……...………1> 30lb…………..0
Inexpensive
<$25……….4<$50……..3
<$75…………2<$100……….1>$100……….0
Easy to Use
Usable with Minimal
Assistance
Non-Student Can Use…3College Student………..2Creek Employee………..1Engineer……………….0
Large Screen
Graphics Display…3
LCD Display………2
Scrolling Display…..1
No display……..….0
Assigning Metrics• Objective: Lightweight
• Units: Rating weight on scale from 0 (worst) to 5 (best)• Metrics:Total weight of device from 0 (more than 30lbs.) to 5 (less than
5lbs.)
• Objective: Inexpensive• Units: Rating cost of materials only 0 (worst) to 5 (best)• Metrics:Total cost of materials from 0 (more than $100) to 4 (less than
$25)
• Objective: Large enough screen to view information• Units: Rating whether the device has a large enough screen 0 (worst)
to 3 (best)• Metrics:0 (Device has no display) to 3 (Uses graphical display)
Assigning Metrics (cont.)• Objective: Usable with minimal assistance
• Units: Rating ease of use on scale from 0 (worst) to 3 (best)• Metrics:Ease of use from 0 (Only an engineer can use it) to 3 (anyone
who can read the manual)
Pairwise Comparison ChartGoals Inexpensi
vePortable
Minimal Assistance
Large Screen
Score
Inexpensive ***** 0 1 1 2Portable 1 ***** 1 1 3Minimal Assistance
0 0 ***** 0 0
Large Screen 0 0 1 ***** 1
Morph ChartFunctions Possible Means
Measure Velocity Strain Gauge Propellor Pressure Transducer
Calculate Flow Rate
Arduino Pi
Calculate Depth Columnal Pressure
Physical Ruler
Design SelectionFunctions Possible Means
Measure Velocity Strain Gauge Propellor Pressure Transducer
Calculate Flow Rate
Arduino Pi
Calculate Depth Columnal Pressure
Physical Ruler
Questions