Seeing like a bike


Gas sensors calibration

Material used:

  • Wine preserver gas + vacuum bag
    • Baseline calibration

As we mentioned in our previous blog, our first try to calibrate the gas sensors was using helium balloons and it did not work. It took a while for us to get the material we needed to do the calibration but now we are finally done with this process and we are ready to move on.

Gas sensors calibration process : N2O, CO, O3
Gas Sensors base line values 
After putting the wine preserver gas which consist of Nitrogen dioxide (N2O), Argon (R), and Carbon Dioxide (CO2), into the vacuum bag, the gas sensors gradually responded and they are the base line values. The following graph illustrates these values.

Gas sensors base values.

          A new 3D-printed case

We made a stronger  3D-printed case. Our previous version of this case was made of      ABS plastic which is a low quality material for our our case needs. Now, our  new case id made of Uv cure resin plastic which is much better than the previous one. Our new 3D-printed case is stronger, soft, and manageable.

3D-printed case.

         Our system broke

 On the way to our midterm presentation we dropped off by accident the box that goes in the back of the bike. This was the only one box that we have ready to collect data and some of the components inside  were damaged. We were sad because we were not able to show our system working in the presentation, but actually  the dropping  was a good happening since  we were able to detect some weaknessess  in our setting. So, now we are being working on the damages in our system and figure it out how to make it stronger. 


Our goals for week 7th are:

  1. Fix our broken box and build at least 3 more
  2. Collocate sensors at the Atlanta sensing station
  3. have at least three equipped bikes
  4. Get data and pilot data