This fifth generation MRU 5 is specially designed for high precision motion measurements in marine application and for users requiring high accuracy roll, pitch and heave measurements.
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 provides documented roll and pitch accuracy of 0.02deg RMS at a ??5deg amplitude. The unit maintains its specified accuracy aboard any surface vessel or subsea vehicle.
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 wear-out parts.
The unit is delivered with Windows based configuration and data presentation software. In this software vector arms from where the MRU is mounted to center of gravity (CG) and two individually configurable monitoring points (MPs), can be defined. The heave measurements can be output in four different locations (the MRU itself, CG, MP1 and MP2) simultaneously on serial lines or Ethernet port. Typical monitoring point is the transducer head or the crane tip.
