InvenTeam Worknight
Date: 2.25.20
Location: Logan High
School
Time: 4:30-6:30
Goals: Continue testing
the sensors, determine baselines for the software, and begin working on ideas
for protecting the sensors and electronics
Students: Tommy, Abie,
Clara, Sam, Rebecca, Will, Ella
Today we continued our
work on the sensor circuit boards and tested the second board for
functionality. We attached the two sensors to the top and bottom of the
Camelbak and took pressure readings with different amounts of water, in different
positions, and with different amounts of pressure on the bladder. We also
discussed ideas for securing and protecting the sensors and electronics. We
thought about questions like how will the sensor be mounted on the Camelbak?
Where will it be mounted?
We determined the
baseline readings needed for the software. Our first priority readings were:
empty bladder (0% full), half full (50% full), full (100% full). Our second
priority readings were bladder compressions, which we can get from repeating tests
we have done previously. Another question that came up was how will this
monitoring system be powered?
We discussed multiple
possibilities like batteries and batteries that can be solar powered.
Because our team
shirts came in last week, we ended the work night with a team photo!
Notes from Abie and Rebecca: Circuit Board and Plumbing
Packaging
Problem: We need to design an enclosure that protects two
circuit boards and a battery pack.
- Enclosure
- Snap-together
plastic enclosure/box sealed with o-rings
- Use
inventor to design box, purchase o-rings and other parts
- 2
Different boxes vs one big box
- House
both boards in one box, use tubing to connect top and bottom to meet with
one big box
- Tubing
- Where
would we put the sensor connections for the tubes?
- Having
the tube on the twist opening would make things difficult when opening
the bladder
- Run
two tubes through one fitting, allowing for one central location for the
box
- Where
would we disconnect the tube to attach to the box?
- Use
one connection with one long piece of tubing permanently connected to
the box
- Use
two connections, a tube to connect to the bag and a tube to connect to
the input on the box
- Location
of box(s)
- Run
tubes into a more accessible location in backpack
- Makes
the battery pack accessible and isolated from water
- Where
do we attach the box?
- Cut
out a section of the backpack to place it
- Make
the enclosure have the ability to be removed from the backpack/bladder
- Use
velcro to remove
- Use
some sort of clip
- How
do you make the box compatible for different backpacks or bladders?
- Make
the design limited to only one backpage and bladder size
- Concept
A
- Mount
the box permanently in the backpack, in the same compartment as the
bladder
- Pros:
The tubes are in the same same compartment as the bladder
- Cons:
The circuit could get wet because it is close to the bladder
- Concept
B
- Mount
the box in an isolated compartment as the bladder
- Pros:
It would prevent the circuit from getting wet
- Cons:
You would need to cut through the backpack to connect the sensor tubing
to the box
Dimensions of circuit board
Length - 8.5cm
Width - 3.2
Height - 2.2
9 Volt Battery
Tube size 3mm or ⅛ In
 |
| Sam and Will working on programming parameters. |
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| Tommy and Clara and Mr. Foye bench testing the two sensors before doing a water volume test. |
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| Rebecca and Abie working with Mr. Butterworth on a housing for the electronics. |
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| Our first water volume test with both sensors implemented. |
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| In one part of the test we used a book as a weight to see if compression effected the pressure readings. |
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| The 2019-20 Logan InvenTeam |
