Project Development
Briefly describe my team chemical device
Show how the team planned, allocated the tasks, and executed the project.
Document the entire design and build process of the chemical device and include videos, pictures, and screen captures of the processes.
Include “Hero shot” of every milestone of the processes, example the part A that was 3D printed, part B that was laser-cut, electronics components moved/worked according to the program. Hero-shot is taken with the person- in-charge holding/working/making the parts.
Include the name of the person who was in-charge of every part of the project.
Document my individual contribution to this project.
Provide the link to the page of the blog of my teammates.
Describe problems encountered and how the team solved them.
Include all the project design files as downloadable files.
Embed the final prototype design file, i.e., the final fusion360 design file showing the entire prototype.
Type my Learning reflection on the overall project development.
- In this section, I will briefly describe my team chemical device.
- What it is. What problems will the chemical device solve?
- Below is the hand sketch of the chemical device.
Our team chemical device is an Automated Door Handle Sanitiser.
Background:
With the rise of Covid-19 cases in Singapore, Covid-19 patients are often going in and out of the hospitals. Covid-19 are transmitted through high touch surfaces and door handles are very contaminated(not just with viruses as well as bacteria). Based on a study, high-touch surfaces have 14 different bacteria colonies on one door handlle and each colonies contains more than a million bacteria. Covid-19 is also transmitted on high touch surfaces hence it is important to keep our door handle sanitised always.
What is it?
Just like automatic hand sanitisers, however this is for door handles. Hence it disinfects the door handle for the next person to use. It sanitises the door handle after every use.
What will the chemical device solve?
Solve the problem of having unsanitised door handles that are being infected by a Covid-19 patient. This will then reduce the transmission rate and lower the number of cases. As hospitals are very prone to Covid-19 cases, this door handle sanitiser will be created for healthcare settings.
It is an cheap yet efficient way to help hospitals as there are tons of door handles in hospital hence with our solution being cheap, it will definitely help in the long run.
Here's a sketch of our product:
The small box inside is the servo.
- In this section, I will list down my team member's name and their respective roles (CEO, CFO, COO, CSO)
- I will show the finalized BOM (BILL OF MATERIALS) table.
- I will show the finalized Gantt chart (planned and actual) and the tasks allocation for each team member.
Here is the finalised Gantt Chart: Gantt Chart link
- Me(Jasmine) and Weng Yan will be in charge of CAD Fusion 360(outer case, tank and top cover).
- Glenn will help to 3D print the tank while me and Weng Yan will laser cut the outer case, interface and top cover.
- Tristan and Hariz is in charge of Arduino Programming for the spray.
- Hariz is also in charge of 3D printing the nozzle for the spray.
- The team then assemble and prototype testing together.
Part 1. Design of cardboard prototype (done by everyone)
Step 2: Cut out and stick the tank
Part 2. Design of Outer Box and Tank CAD (done by ME, Jasmine)
- Documentation for task 1.
Step 1: Create a sketch on the top plane.
Step 2: Create a rectangle of 166mm(length) x 86mm(width)
Select “create”,”rectangle”,”center rectangle”
Select the centrepoint (0,0), and input a value of 166mm x 86mm
Step 3: Extrude the base
Click on “finish sketch”, select the plane and extrude by 3mm
Step 4: Creating the sides
Create sketch on the top plane of the base
Select “create”,”rectangle”,”center rectangle”.
Select the centrepoint (0,0), and input a value of 160mm x 80mm
Select “Modify” then “Offset” by 3mm
Click “finish sketch”
Step 5: Creating the walls
Select the outer edge (highlighted below)
Click on extrude and extrude by 160mm
Step 6: Making holes for LED and sensor (on the front side of the box)
Create a sketch on the front side of the box
Click on “create”, “line”, change to construction line. Construction an intersection to find the middle point of the plane.
Click on “create”, “point”, and select the middle point.
Select on “Create”, “rectangle”, “center rectangle”. Click on the intersection point and input values of 15mm x 7mm
Note: Remember to deconstruct the construction line.
Click on “Finish sketch”, “Create”, “Hole”. Input value: 7mm (Diameter) x 3mm (Depth)
Click on “Extrude”, under Operations click on “Cut”
Input distance: -3mm
Rename “Body 1” as “Outer box”
Tank
Create a new sketch on top of the Outer box created previously.
Create “rectangle”, “center rectangle” On the center point
Input values: 100mm x 60mm
Click on rectangle created, and offset it by 3mm
Create “rectangle”, “center rectangle” On the center point
Input values: 167mm x 87mm
Click on “Finish sketch”
Click on the edge of the center rectangle created
Click on Extrude
Value: -60mm
Select on inner rectangle edge
Click on “offset”
Value: -60mm
Click on the Orange offset plane and “create sketch”
Click on “rectangle”, “center rectangle”. Key in value of 106mm x 66mm
Click on “Finish sketch”
Click on the bottom layer of the tank
Extrude: -3mm
Select on the top edge of the tank
Click on “create sketch”
Click on “rectangle” , “center rectangle”
Input values: 100mm x 60mm
Click on “create sketch”
Click on “rectangle” , “center rectangle”
Input values: 167mm x 87mm
Click on “Finish Sketch”
Select both the edge of the top of the tank and the most outer layer just created before.
Extrude by: 3mm
The tank should look like this at this step:
Rename “body 2” as “tank”
- Hero shot for task 1.
Photo of me and Weng Yan because we did CAD and laser cutting together.
Here is a video of our building process.
- Problem 1:
- Problem 2:
- Problem 3:
- Problem 4:
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