Urban Robots Could Use Manholes to Navigate

The urban canyons common to big cities tend to block out GPS signals, but scanning manhole covers could provide robots with location information that's just as accurate

2 min read
Urban Robots Could Use Manholes to Navigate

GPS is generally the standard to which all other localization technologies are compared, and in most outdoor environments, it's hard to beat for accuracy, precision, and reliability. It's funny, then, that the times you need GPS the most (in places like downtown New York or San Francisco) usually end up being the times that GPS utterly fails due to tall buildings blocking out the sky.

Robots have this same problem, so researchers have been trying to find other ways that a robot can localize itself where GPS is intermittent. A common strategy is to use wheel odometers or inertial measurement units to "guess" where the robot has gotten to since its last external position fix, but accuracy still relies on landmarks to help correct for errors. So let's see, what are some things that are easy to find in urban environments and don't go anywhere? You probably weren't thinking "manhole covers," but yeah, it's manhole covers.

The reason manhole covers might be a good idea is because they have well-defined locations and because they're fairly large and made of metal they're pretty easy for a robot to spot, even if it's dark or rainy or snowy or whatever. With sensitive enough sensors, a robot could detect all the dents and wear that make each cover unique, and fix its position within inches. Sounds great, and it works in tests along with a database of pre-scanned manhole covers, except that generally, you tend to find manhole covers in the middle of the street, implying that a system like this would be best for autonomous cars as opposed to other robots that might not do as well running into traffic to determine their position.

And, yes, that's a picture of a manhole robot. That shoots manholes. Thank you, Mighty Morphin Power Rangers.

[ Abstract ] VIA [ New Scientist ]

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The Bionic-Hand Arms Race

The prosthetics industry is too focused on high-tech limbs that are complicated, costly, and often impractical

12 min read
A photograph of a young woman with brown eyes and neck length hair dyed rose gold sits at a white table. In one hand she holds a carbon fiber robotic arm and hand. Her other arm ends near her elbow. Her short sleeve shirt has a pattern on it of illustrated hands.

The author, Britt Young, holding her Ottobock bebionic bionic arm.

Gabriela Hasbun. Makeup: Maria Nguyen for MAC cosmetics; Hair: Joan Laqui for Living Proof

In Jules Verne’s 1865 novel From the Earth to the Moon, members of the fictitious Baltimore Gun Club, all disabled Civil War veterans, restlessly search for a new enemy to conquer. They had spent the war innovating new, deadlier weaponry. By the war’s end, with “not quite one arm between four persons, and exactly two legs between six,” these self-taught amputee-weaponsmiths decide to repurpose their skills toward a new projectile: a rocket ship.

The story of the Baltimore Gun Club propelling themselves to the moon is about the extraordinary masculine power of the veteran, who doesn’t simply “overcome” his disability; he derives power and ambition from it. Their “crutches, wooden legs, artificial arms, steel hooks, caoutchouc [rubber] jaws, silver craniums [and] platinum noses” don’t play leading roles in their personalities—they are merely tools on their bodies. These piecemeal men are unlikely crusaders of invention with an even more unlikely mission. And yet who better to design the next great leap in technology than men remade by technology themselves?

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