SensorGrid — Josh Klein

I joined Northwestern’s Knight Lab as a Student Fellow in June of 2018. The Knight Lab is a community of designers, developers, students, and educators working on experiments meant to push journalism into new spaces.

What I’ve done:

I worked on the technical development of the sensors using C and Arduino, specifically working on power maintenance and modularity of the devices. I also designed and 3D printed the custom housing unit. Lastly, I developed custom Python scripts to analyze and visualize the pollution data. See the Github repo here.

I ran the calibration deployments of our sensors by collocating EPA stations around Chicago to ensure the collected data is accurate. Below is sample of the data we collected from our initial collocation tests.

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Here is our collected particulate matter data (Blue) compared to the EPA’s (yellow). Notice the largest inaccuracies occur when humidity (Green) is high.

I joined Northwestern’s Knight Lab as a Student Fellow in June of 2018. The Knight Lab is a community of designers, developers, students, and educators working on experiments meant to push journalism into new spaces.

What I’ve done:

I ran the calibration deployments of our sensors by collocating EPA stations around Chicago to ensure the collected data is accurate. Below is sample of the data we collected from our initial collocation tests.

We are exploring different machine learned models for calibration and see promise with Classification and Regression Tree models.

After the calibration deployments, we plan to move from the prototyping phase to the product phase.