Roving on Thin IceJanuary 14 2017
With robots, we can go to places that are dangerous for humans. Due to the mild winter this year, the ice covering on the bay is not entirely solid. We saw a mound of dirt on the ice a few meters away from the shoreline and were curious as to what it was. We will deploy the Robot Missions robot to investigate. Join us on this expedition to see what we will find!Read background
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Looking at plants
Continuing on the trek, we were able to look at some frozen plants! We believe these would be the lower stalks of cattails.
Although it is rather ordinary, what we find exciting here is that we're able to look at this, a distance away from the coastline, with the robot. It's a prime opportunity to use this technique to see what else we can find.
Sometimes when out in the field you encounter things that are unexpected. This is one of the best parts, as it is a prime opportunity for learning!
In this case, we encountered not just one wheel... but two wheels coming loose from the robot.
Earlier before this expedition, we were trying to change to different wheels. This involved loosening the set screw that attaches the motor hub onto the gear motor's axel. When reinstalling, we didn't add the same thread lock as we did on the other side.
Thus, with all of the vibrations from the robot moving, it ended up loosening the set screws and causing them to fall off.
It wasn't too bad- the robot was still able to explore with the other two wheels, and it helped to retrieve the ones that fell off.
Trek to Destination
The robot handles just fine on the ice, even though these wheels are primarily for sand. Having some snow-ice on the surface provides friction so there is traction to move the robot forward.
It will take a bit of time to get to the destination. Since the tether isn't long enough, we'll be moving along the ground / frozen cattails following the bot.
Watching this clip afterwards, we are mesmerised at the sounds of the crackling ice as the robot moves across it. Wow!
Overcoming the ice sheets to entry area
In order to get to where we wanted the robot to go, we would have to pass by a few obstacles first. There's ice sheets angled upwards that are just before the entry to the 'smoother' part of the bay where it's frozen over.
The obstacles don't look too intense, and the robot will be able to handle it
With some creative driving, we were able to get it past these obstacles and to the entry area! What's great is seeing the robot's point of view too
After the robot overcomes the obstacles, we're rewarded with a stunning view of the bay
Onwards next- travelling to the point of interest
You know when you are on the shores of Collins Bay in the summer. The view is stunning, with the open Lake Ontario in the distance. Canadian geese are quietly sitting on their rocks. That is, until something disturbs them and they all begin squawking. The smell is unmistakable.
We regularly tested the robot here. The land provided a mixture of loose dirt, medium sized stones, mud, and cattails for the robot to rove around in.
Now it is winter, and it's a bit different. The geese have departed. Though, it seems oddly mild this year. There's more to explore now that the ice is here, but it isn't completely frozen over.
A perfect case to use the robot!
The Robot Missions robot is a tool for citizen scientists for debris retrieval, exploration, and mobile sensor monitoring. It's entirely 3D printed, so anywhere you go in the world that has a printer, you can modify or make replacement parts.
For this expedition, we removed the scoop end effector and attached a GoPro. We have a GPS unit payload to track the robot's location, as well as record temperature, humidity, and altitude.
Join us and watch our journey unfold as we deploy the robot onto thin ice!