Embedded Files
Pitch Deck Presentation
CO2 sensors placed in various location around a desk. In this experiment, having access to a CO2 canister which emulates human breath, a cloud of CO2 emanating from a source was simulated, measured, and tabulated.
Above is another angle of the desk simulation shown in the picture to the left. Here, the CO2 canister is aligned with one row of CO2 sensors. From experimentation, aligned sensors recorded higher values. Although this followed logic, it didn't follow our simulation.
Purple Air PA-I-Indoor CO2 Sensor. Working with our sensor array, it validates trends of CO2 and PM2.5 dispersion throughout a room.
Experimental results of First CO2 concentration Test. As expected from reality, CO2 measurements decreased as distance from the source decreased.
First CO2 experimental setup. This setup tested CO2 sensor displacement from a source to test the feasibility of our design.
Preliminary room design. Physical Measurements were taken to ensure the room simulation matched reality.
Above is a slide from the proof of concept presentation. Pictures were taken to compare the simulation to reality. Arrows show important locations which were most likely to effect flow.
Above is a picture of our first test. CO2 sensors were placed in a line in front of our CO2 source our of frame to the left of the picture.
Arbitrary Transient CONTAM simulation. Tests like these were performed in effort to learn the inner workings of CONTAM.
Picture of the completed array. In this configuration, all CO2 sensors are connected to one microcontroller, this allows for higher density measurement.
Picture of our multiplexer sawdered to a breadboard. These allow for multiple CO2 sensors to connect to one microcontroller.
SCD30 Sensors Sawdered to a singular breadboard. Not representative of our final design.
Microcontroller communicating with an individual multiplexer. Alot of effort went into coding multiplexers to ensure one microcontroller could communicate with multiple sensors.
Shown above is a configuration utilizing 2 Arduinos. This design allows for CO2 sensors to be placed at vital locations around a spacious room.
Shown above is a configuration utilizing one Arduino. This configuration allows for higher density sensing for more higher quality measurement.
Rejected MH-Z19B sensors. They were intended to be a cheaper alternative for our sensor array, but their measurements were far too inaccurate.
CONTAM Steady state simulation. 3 Sources of CO2 emanate gas inside of a square room. Different concentrations are shown in different colors on the left.
The above image shows our initial coding between our CO2 sensors and Arduino setup.
Initial testing of different CO2 sensors. To the left is a CCS811 sensor while to the right is a SCD-30 Sensor. At this part of our design, we were testing cheaper alternatives, and their possible pros and cons in our sensor array. The CCS811 sensor ended up calculating CO2 concentration through rough estimations, making it incompatible with our array.
CCS811 sensor and SCD-30 Sensor both testing ambient CO2 concentrations.
A image of all the tools needed to complete our design
Our First SCD-30 Sensor. These proved to be the best sensors, applied in our final design.
Initial PPM readouts from sensors. At this stage of development, we were trying to get CO2 sensors up and running. Calibration was yet to be completed.
Page updated
Report abuse