LBC - Detailed Information

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The LBC was created using the proven technology found in the SeaBotix LBV line of ROVs. By simply enhancing the core components with the new drive mechanism and patented Vortex VRAM the LBC offers a revolutionary new outlook on underwater inspections.

LBV Foundation
With more than 375 units in operation around the world the LBV makes the ideal platform in which to build the LBC. The LBC utilizes the core system from the LBV including the isolated pressure vessels, thrusters, electronics and sensors.

At the core is the primary housing which contains the electronics, cameras, internal lighting and sensors. Constructed from aluminum and composites the housing is built to withstand depths to 150 meters (500ft) and operations in harsh environments. All components are modular and very simple to change should the need arise.

From the core the LBC adds the back plane which is an impregnated circuit board acting as a spinal cord for the thruster and auxiliary attachments. The horizontal thrusters and flotation module are attached to the back plane. Adding protection to the LBC is the marine grade polyethylene frame. The protective frame also offers mounting for the Crawler Skid .

To learn more about the LBV visit the LBV150² section of this site.

Powerful Thrusters
The LBC is fitted standard with SeaBotix own Brush-Less DC thrusters. There are four thrusters (two forward and two vertical). Each thruster is identical and isolated not only from each other, but also the primary housing. Should one flood the others are unaffected.

Most impressive are the performance characteristics of the thrusters. Each thruster has a peak Bollard thrust of 3.9 kgf (8.6ft/lbs) resulting in sufficient power to overcome current and umbilical drag. The thrusters use a Brush-Less DC motor that is able to operate at full power for extended periods and does not have a cummutator brush to wear out. Also, each thruster is individually oil-compensated for heat dissipation and protection from water intrusion. The thrusters offer high performance and low maintenance.

To learn more about the Thrusters used on the LBC click here.

Crawler Skid
When conditions exceed traditional ROV capability the Crawler Skid is quickly and easily attached to the LBC. Four (4) stainless screws per side and one wet-mateable connection are all that is required. The process takes only a few minutes. With the skid already trimmed for neutral buoyancy the skid is ready for operation.

Two marine grade polyethylene frames are fitted with the drive mechanisms, VRAM and flotation. The added flotation alters the center of gravity to a more central location thus enabling smooth roll capability.

Drive Mechanism
Working with motor company Pittman a motor and gearbox package was designed to drive the wheels.  It was decided to use four 150mm (6in) knobby tires that would offer adequate contact with the ship hull as well as provide clearance for obstacles.  Four motor and gearbox combinations were installed in two custom axle housings.  Wheel hubs were made and foam discs were mounted to the hubs to help with buoyancy.  The knobby tires were then adhered to the foam creating a complete drive assembly.

The motor and gearbox combination is controlled by a proprietary motor controller and producesimpressive amounts of torque and power enabling the LBC to travel at speeds up to 0.5m/sec (1.5ft/sec) or 30m/min (100ft/min).  Although there are four drive motors, one for each wheel, they are controlled in pairs (port and starboard).  This way the LBC turns on its axis, much like a tank, creating a very tight turning radius.

Vortex VRAM
Enabling the LBC to attach to virtually any hard surface is a unique and patented suction device. The device varies from a ducted prop resulting in smaller form factor and higher suction. Located under the LBC the suction can be varied from 2.3 kgf (5 ft/lbs) to 23 kgf (50ft/lbs) using the hand controller. To give you an idea of how efficient the attractor is only 2.3 kgf (5 ft/lbs) is required to hold the LBC to the side of a pool and crawl.

To view the website of the manufacturer of the attractor (Vortex HC, LLC) click here.

Sensors
The LBC is fitted with a variety of sensors. A heading sensor is installed to aid in navigation in ROV mode. There is a depth sensor fitted providing accurate depth readings in both ROV and Crawler mode. The depth reading is useful when navigating on a ship hull to ensure a straight line is achieved. Also, there is a temperature sensor for external temperature readings.

All of the sensor data is displayed on the on-screen video overlay. This provides the operator with all the important on-screen enabling operation without having to look away from the video screen.

To learn more about the Video Overlay click here.