Questions tagged [underwater]
Underwater robotics is a branch of robotics. Underwater robots can be autonomous, or they can be remotely operated. This is an emerging science, which has become more popular with evolving technology.
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DVL as a ranging sensor
I am trying to use a Doppler Velocity Log (DVL) as a ranging sensor.
The DVL has four acoustic beams with known poses and ranges. This makes it possible to estimate 3D points on the seabed (if the ...
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Underwater Glider Obstacle Avoidance simulator
I am currently taking part in a project where a team is building an autonomous underwater glider with obstacle avoidance features.
However, since I do not have a background in Robotics (I am in ...
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Underwater navigation without the use of acoustic sensors
I have been reading about different types of underwater navigation.
According to this Youtube video, these are the following navigation systems:
Inertial navigation systems (use of Inertial ...
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how to get an 8 hour autonomy for an underwater robot?
CONTEXT: I'm working on a project consisting of making an underwater robot "fish" for an aquarium. It is mandatory to get at least 8 hours of autonomy. I'm responsible of the electrical part ...
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Fitting propeller to shaft
Hey I'm building an underwater robot(ROV) for a school project and I recently bought plastic propellers 55mm but sadly they came without prop adapters. Is there any easy alternative such as using ...
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Why to seal a motor shaft, or the whole motor, for underwater ROV?
I just finished a competition for underwater robots. The water is about 40-50cm in depth and 90% of the designs just exposed the thrust motors completely in the water similar to the picture below and ...
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RC transmitter/receiver for underwater robot [closed]
I am working on a project to build a remotely controlled underwater robot. The max depth the robot has to dive is 40cm. I tested the 2.4GHz RC transmitter and receiver and it could work only up to ...
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Strategy for 3D path planning over large distances with kinodynamic constraints
I was hoping to pick your brains about a problem that even after much reading has left me baffled.
My Application:
For the sake of simulating underwater scenarios in very large environments (up to ...
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How to localize an acoustic source underwater with a hydrophone array
I am working on an Autonomous underwater vehicle (AUV), and I do not know how to localize an acoustic source underwater
I know that I will use an array of hydrophones but how can actually get the ...
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How to simulate water/ pool for underwater vehicle in Gazebo/SimScape?
I have tried SimScape and gazebo but I did not get a solution for simulation of a swimming pool. Can somebody help with the same? Do I have to create the whole swimming pool using simple rectangular ...
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AUV Lipo Battery capacity
I'm making an AUV that requires 15-20 minutes of operating time. I'm using 6 of these motors (Blue Robotics T200 Thrusters) for propulsion; I'm looking for 6S lipo batteries (22.2V) but i don't know ...
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Why the bldc motor not able to move my water boat?
I have a 1100kv brushless motor from dys with a propeller as shown.
I have attached this motor to two pvc pipes joined together as shown and packed the electronics inside polyform to protect from ...
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How to choose a motor for water surface vehicle? [closed]
I am about to build a water surface vehicle (a kind of boat).
I was looking for different type motors and ruled out the stepper and servo motors. But I got confused between brushed and brushless dc ...
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Area coverage of autonomous underwater robot
I'm currently working on an autonomous underwater cleaning robot and would like your input on some navigation algorithms
Problem:
Wash the inside of big, open and filled tank, e.g. water storage ...
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UWSim Pressure Sensor Units
I am attempting to use the data Underwater Simulator (UWSim) provides through the ROS interface to simulate a number of sensors that will be running on a physical aquatic robot. One of the sensors ...
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How to localise a underwater robot?
I am building an autonomous underwater robot. It will be used in swimming pools. It should be capable of running in any normal sized pool, not just the pool in which I test. So I cannot rely on a ...
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Which middleware for IPC and multi-threading in a autonomous robot? [closed]
Aim: To use multi-threading and inter-process communication(IPC) when coding an autonomous robot.
Platform: Embedded Linux (Yocto)
Constraints : Limited CPU power.
We are building an Autonomous ...
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Underwater ROV Variable Ballast
How would you guys recommend making a variable ballast system for an underwater robot? I was thinking about this problem earlier and I was trying to figure out if there was a way to make one that didn'...
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Tracking Landspeed Underwater
I am hoping someone might be able to nudge me in the right direction (apologies for the long post but wanted to get all the information I have gained so far down.
Basically I am after a solution to ...
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Water depth arduino sonar sensor [closed]
Just like a fish finder finds the depth of the water directly beneath it, Im trying to find a sensor that I can purchase for the Arduino that does the same. would like it to check up to 20 ft at least,...
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Upgrading the motors on a SeaPerch ROV - more torque, or more RPMs?
I am looking to upgrade the motors for SeaPerch underwater ROVs so we can carry heavier payloads and more equipment.
My question is, should I look for motors which have a higher RPM and lower ...
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Preventing leaks in motor shafts for underwater bots
Whenever building an aquatic bot, we always have to take care to prevent leakages, for obvious reasons. Now, holes for wires can be made watertight easily--but what about motors? We can easily seal ...
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What's the most effective type of rechargeable battery when taking into account size / weight / Ah?
I'm looking to build an underwater glider robot that will need to remain autonomous for long periods of time, perhaps even months. Power draw should be minimal, and I'm thinking of including some form ...
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Choosing the right dimensions for an underwater glider
I'm looking to potentially build an underwater glider, a type of submarine that's slow but can operate on extremely low power draw. However, in order for it to work effectively I've found several ...
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