This week we had to do some plywood crafts.

We designed and built a plywood sliding window mockup to facilitate data capture and prototype testing.

Tracking System for Classroom Ventilation Routines

A STEM project for classrooms

the VenTTracker project - Blog #05 - Sliding Window Mock-up

The final result of our mockup to simulate the behavior of sliding windows:

Edit media

Dimensions x Small Medium Large Custom

Subject (required) Brief Description Tags (separated by comma) Video visibility in search results Visible Hidden

Parent content

VenTTracker #05 -  Sliding Window Mock-up VenTTracker #13 - Project wrap-up and Lessons learned

Poster

Upload Preview

Ok

Cancel

The design

We a need a model, mockup, to make tests and gather data for Machine Learning. So we can carry out the tests in a controlled environment.

We are going to design a plywood model to simulate sliding windows.

These are our prerequisites:

• It should be designed to allow only one degree of freedom in the direction of sliding.
• It should still allow us to simulate small vibrations in all three dimensions.
• It should have a friction similar to a sliding window and that can be adjusted to simulate cases with more and less friction.
• It should have some rollers to facilitate movement as in real sliding windows.
• It should have several surfaces where the device and / or magnets can be placed both on the fixed part and on the moving part.
• The mockup should have enough to fit a medium-sized breadboard and a battery.
• Must be able to be built with a medium sized plywood board and a 20mm x 10mm wood strip

3D Front View

At the front we have enough space to place a medium-sized breadboard.

3D Rear View

At the back we can place a 9v battery or another type of battery. Balancing the weight of the front part somewhat.

The animated design with Windows 3DBuilder

Edit media

Dimensions x Small Medium Large Custom

Subject (required) Brief Description Tags (separated by comma) Video visibility in search results Visible Hidden

Parent content

VenTTracker #05 -  Sliding Window Mock-up VenTTracker #13 - Project wrap-up and Lessons learned

Poster

Upload Preview

Ok

Cancel

Model parts

The construction

We cut the Plywood board and the wooden strip to obtain the necessary pieces for our model.

We are going to use screws and nuts to make the joints and washers to prevent the nuts from loosening with vibrations and to obtain enough space so that the boards do not rub too much against each other.

Some of the parts are assembled with white liquid glue.

And finally the built model.

With its sliding moving part.

We compare with the size of a real window. Our model is somewhat smaller but it will allow us to take data and test prototypes from the desktop.

Next steps

• The next step is to make our first prototype of the window sensor.
• The prototype must be welded and well secured to facilitate the data collection for the training of our Machine Learning models.
• Start taking and labeling samples and design a ML model.