The new issue of Nature includes an article on the
latest state-of-the-art Autonomous Underwater Vehicles (AUVs). They can
take on tasks too dangerous for crewed vessels and too difficult for
ROVs, which must be remotely controlled from the surface. Much of the
article is about ABE,
a robot that has proven the usefulness of AUVs on several recent
missions, including one in which it used sonar to produce a
topographical map of the seabed with 30 times the resolution attainable
from a surface vessel.
I read they use some sort of a gyroscope-compass to determine headings?
Any info about this?
Could be good for robots to determine headings.
The current Dinsmore Compass works good, but it is very sensitive to
nearby magnetic fields like buildings, motors, and vibration.
I've used various sensors like this, usually called Attitude Heading
Reference sensors, which combine a three axis flux gate magnetometer,
rate gyros and accelerometers. They do internal filtering and output
angles and angle rates for yaw, pitch and roll. The mag can usually be
calibrated for nearby metal that is part of the vehicle structure.
Two small, sub-$2k devices on the market that we are currently
In our existing vehicles we use an $8k device from Crossbow Technologies.