Pollution Sensors, Great granularity, Urban environment, Calibration Unit
The use of low cost pollution sensors allow a potential wide distribution of sensing equipment and provides with great granularity in urban environments. However, using low cost sensors require a careful approach with respect to the data handling and the use of a proper sensor characterization and calibration is very important. The aim for this project is to create an Open source, Fabbable and Modular equipment aiming to improve sensor calibration approaches for low cost pollution sensors. This unit can be easily built with a CNC machine and common pneumatic and gas piping equipment. Sensor acquisition is done via: – Analog and digital sensors and – the SmartCitizen Kit and it’s range of supported sensors, being the data sent over to and centralized on an inexpensive Raspberry Pi. A web interface allows a simple test setup and logging interface, with customizable interactive graphics and status updates. Finally each of the modules is independent and adaptable, with parameterizable CAD models to easily iterate on their design. A recirculation pump is also included and managed by the Raspberry Pi via 12C to allow for a good gas flow across the sensors.
Óscar González Fernández has made this project