Dear CamBike enthusiasts,
Fitting the sensor hub on your bike In preparation for the Paris trip, we’ve been working to ensure our sensor hub would survive the stresses of two days on the road: once all the components had been assembled, they still needed to be packed into a “box” and secured on the bike. Going forward, this mounting system will need to be adapted for distribution to many cyclists around Cambridge, who will have different types of bikes and therefore different requirements. We need to come up with a design that can ideally be fitted on every bike, irrespectively of whether it has a rack, a basket at the handlebars, or a bottle cage.
For our prototypes, we’ve designed a sturdy 3D-printed casing, shown in the image below. We will design additional versions to meet different requirements. We are currently working on another version that will allow us to incorporate the particulate matter sensor within the casing. Here the challenge is to make the overall casing waterproof but let air still reach the sensor - if we can’t guarantee an airflow around our sensor, we can’t measure air pollution! We also aim to design a modular casing type that can be adapted to incorporate more or different sensors, allowing the user to set up their own investigations.
The bike-ride to Paris In the very early hours of Tuesday the 10th, Peter set off on his journey to Paris: the ferry taking him across the Channel was departing in the afternoon, and so there was no choice but to leave by 3 am. He took two prototypes with him, which transmitted data on his location and his changes in speed (they had a GPS module and an accelerometer) and also logged information about air quality onto an SD card. All in all, upon his arrival in Paris, he will have cycled around 500 kilometres in just two days! You can follow him live directly on here. Some selected photos from his trip:
Air pollution sensing This week’s CamBike sensor version 3.0 can be seen in the image below. We’ve decided to rely on the Nova SDS011 PM10 sensor. It measures the amount of PM10 in the air, which is a very good indicator for air quality and directly linked to your health. We’ve started writing an explanatory documentation. A sneak preview of the draft for air pollution and a couple of very interesting references can be found here. The data that was acquired next to the barbecue will be shown in the next newsletter, we are still analyzing it - but what we can say for now that it clearly has a (negative) effect on the air quality!
What’s next? Once everyone has safely returned from Paris, we will organise the workshops (in Makespace and the Computer Museum) and start organising for the distribution of the prototypes to volunteers. We will give more information about how to receive the sensor hub and how to install it in the next weeks. The CamBike Sensor Team P.S. If you know anyone who might also like to stay tuned, let them know to just drop us an email!