Rovins

FOG-based high-performance inertial navigation system for subsea vehicles

Rovins is a combined survey-grade full featured inertial navigation system for water depths up to 3,000 m. Designed specifically for offshore survey and construction works, Rovins, thanks to its advanced Kalman filter, improves the efficiency of all operations where accurate position, heading and attitude are key benefits. Rovins is offered in stand alone or «DVL ready».

Exail

Saint Germain en Laye, FR

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Description

Features

All-in-one high-accuracy 3D positioning with heading, roll and pitch, ROT and 3D speeds.
Unique FOG strap-down technology.
Multiple interfaces (DVL, USBL, LBL, Ramses, GPS, depth sensor).
Solution DVL Ready.
Octans footprint compatible.
Post-processing software option.
OEM version available (C5, see Phins Compact Serie).

Benefits

Accurate georeferenced position and attitude at high frequency.
High reliability and low maintenance.
Flexible and scalable configuration for all deployment scenarios and mission sequences.
Immediate availability for all vehicles.
Ultimate sub-metric performance using sparse array.
Outstanding image georeferencing

Application

ROV positioning.
Multibeam sonar.
Out-of-straightness.
Subsea construction.

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Specifications

Other specifications: Typical application

ROV/AUV positioning - Multibeam sonar motion reference - Subsea construction

Distinguishable features

- Accurate georeferenced position and attitude for all subsea vehicles at high frequency- No spinning element hence maintenance free- Flexible and scalable configuration for all deployment scenarios- Immediate availability and performance for all vehicles- Ultimate sub-metric performance using sparse array transponders and on-the-fly calibration- Immediate compatible

Environmental: Max. rotation speed [deg/s]

750

Software: Integrity monitoring of position input

Y

Integrity monitoring of log input

Y

Maximum latency of position input [ms]

10

Maximum latency of log input [ms]

100

Name

Inside Processing

Filtering

Y

Doppler log aided uncertainty: Pitch [deg]

0.01

Roll [deg]

0.01

Surge/sway [m]

0.025

Decrease in position accuracy [m/hr]

0.05

Heading [deg]

0.02

GNSS aided uncertainty: Heave: constant part [m]

0.05

Heave: variable part [%]

5

Increase in position uncertainty w.r.t. stand-alone GPS [m]

0.8

General: Year of initial development

2008

Height [m]

0.374

Width [m]

0.213

Length [m]

0.213

Weight [kg]

15

Min. Voltage (DC)

20

Max. Voltage (DC)

32

Power consumption [W]

15

Splashproof casting

Y

Water resistant casting

Y

Water resistance [m]

3000

Mean time between failures [hr]

80000

Type of accelerometer

Pendulum

Type of gyro

Fiber Optic Gyroscope

Removable from base plate

Y

Type of application

Marine

Moving parts

N

Unaided uncertainty: Pitch [deg]

0.01

Roll [deg]

0.01

Heave [m]

0.01

Surge/sway [m]

0.025

Decrease in position accuracy [m/hr]

0.05

Heading [deg]

0.05