MRU 5
The MRU 5 is the ideal sensor for motion compensation of multi-beam echo sounders, offshore cranes, hydroacoustic positioning systems and dynamic motion monitoring of roll, pitch and linear accelerations on offshore structures. The MRU 5 incorporates three highly accurate accelerometers and three high-end Kongsberg Seatex developed Micro-Electro-Mechanical-Structures (MEMS) gyros of type MRG (MRU Rate Gyro). The MRG gyro combines low noise, excellent bias stability and gains accuracy.
Description
The MRU 5 is the ideal sensor for motion compensation of multi-beam echo sounders, offshore cranes, hydroacoustic positioning systems and dynamic motion monitoring of roll, pitch and linear accelerations on offshore structures. The MRU 5 incorporates three highly accurate accelerometers and three high-end Kongsberg Seatex developed Micro-Electro-Mechanical-Structures (MEMS) gyros of type MRG (MRU Rate Gyro). The MRG gyro combines low noise, excellent bias stability and gain accuracy. Very high reliability is achieved by using solid state sensors with no rotational or mechanical wearout parts.
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Specifications
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General
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Height [m]
0.014
Material
Anodised Aluminium
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Environmental
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Max. operating temperature [°C]
55
Splashproof casting
Y
Water resistant casting
N
Vibration and operating shock tolerance
IEC 60945/EN 60945
Electromagnetic compatibility
IEC 60945/EN 60945
Mounting orientation
No limitation to mounting orientation
Min. operating temperature [°C]
-5
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Power
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Min. Voltage (DC)
10
Max. Voltage (DC)
36
Power consumption [W]
12
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Roll and Pitch Output
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Roll and pitch measurement
Y
Angle accuracy static in ° [RMS]
0.02
Angle accuracy dynamic in ° [RMS]
0.02
Resolution angle [°]
0.001
Angular roll/pitch range [°]
360
Angular rate range [°/s]
150
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Interfaces and Data
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Ethernet port
Y
RS232 output
Y
RS422 output
Y
Other output ports
Analog,
Data output rate
200 Hz
Data output protocols/formats
MRU normal, Atlas Fansweep, NMEA proprietary, TSS1, Sounder, Seapath binary 23, EM3000 & PFreeHeave®. The MRU 5 outputs roll, pitch and yaw angles and corresponding angular rate vectors. The unit outputs relative (dynamic) heave, surge and sway positions, velocities and accelerations in adjustable frames. Output protocols for commonly used survey equipment are available on two individually configurable serial lines and Ethernet/UDP.
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Heave Output
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Resolution heave [m]
0.01
Max. output heave range [m]
100
Output period real time [s]
25
Heave accuracy real time [%]
5
Output period delayed [s]
50
Heave accuracy delayed [%]
2
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Acceleration Output
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Acceleration measurement
Y
Acceleration range m/s2
60
Acceleration noise m/s2 RMS
0.002
Acceleration accuracy m/s2 RMS
0.01