KONGSBERG Seatex MRU 5 The Ideal Marine Motion Sensor

Product Overview

Kongsberg Seatex MRU 5 is a third-generation marine specific motion sensor designed for high-precision motion measurement scenarios. It uses solid-state sensors (with no moving parts) and mature electromechanical structures to achieve high reliability and is suitable for various motion control scenarios ranging from small underwater vehicles to large ships.

Core application scenarios

Motion compensation of strip depth sonar

Dynamic Positioning (DP) System, ROV System

Helicopter deck monitoring, high-speed ship roll reduction system

Monitoring of towing systems, offshore platforms, and large vessel structures

All maritime scenarios that require safety and performance for high-precision motion data

Usability and Configuration

Built in over 20 single/multi beam sonar data protocols for easy integration

Comes with configuration cables and Seatex MRC configuration software, menu guided settings

Flexible adaptation to multiple types of applications without the need for complex debugging

Each device comes standard with a calibration certificate

Output and Communication Capability

Provide 189 data output variables, supporting both digital and analog outputs

Bidirectional communication: dedicated binary serial port protocol, output supports IEEE 32-bit floating-point numbers

Optional protocols: NMEA 0183, various sonar specific formats

External input: supports speed/heading information access, improves measurement accuracy during steering and acceleration

Third CMOS input: used for peripheral computer synchronization/polling data

Core Features

Maintain high precision in roll/pitch/heave during steering and acceleration

Drift can be ignored after the ship turns due to buoyancy and sinking

The maximum data output rate is 100Hz, and the internal update rate is 400Hz

No installation orientation restrictions, supporting force arm compensation for center of gravity offset installation

Small size, light weight, low power consumption

2-year warranty

Technical specifications

Angle output parameters

Parameter values

Angle range ± 180 °

Angular velocity range of 150 °/s

Full axis resolution<0.01 °

Angular velocity noise 0.025 °/s RMS

Dynamic accuracy (± 5 ° amplitude) 0.030 ° RMS

Scale factor error 0.2% RMS

Accelerometer

Parameter values

Number of sensors: 3 axes

Range ± 30 m/s ²

Acceleration noise 0.0020 m/s ² RMS

Measurement accuracy 0.01 m/s ² RMS

Heave parameters

Parameter values

Output range ± 50 m (adjustable)

Cycle 0-25 seconds

Dynamic accuracy 5 cm or 5% (whichever is greater)

data output

Parameter values

4 analog channels, ± 10V, 14 bits

The maximum number of digital outputs is 16, RS232/RS422

Maximum output rate of 100 Hz

Electrical and Environmental

Parameter values

Power supply 12-30 VDC

Maximum power consumption 11 W

Maximum vibration (non working) 20 m/s ² (0-2000Hz)

Maximum impact (non working) 1000 m/s ² (10ms peak)

MTBF 50000 h

Size Ø 105 × 204 mm

Weight 2.5 kg

Aluminum anodized shell

Key issues

Question: What is the core measurement accuracy indicator of MRU 5? 

Answer: The dynamic accuracy of roll/pitch is 0.03 ° RMS with an amplitude of ± 5 °; The dynamic accuracy of heave is 5cm or 5% (whichever is greater), and the full axis angular resolution is * *<0.01 ° * *.

Question: How does MRU 5 ensure measurement accuracy during steering and acceleration? 

Answer: Support external input of speed and heading information, optimize motion calculation; At the same time, the drift of the ship after turning can be ignored, and stable output can be maintained.

Question: What maritime adaptation capabilities does MRU 5 have in terms of interfaces and protocols? 

Answer: Supports RS232/RS422 digital interface and 4-channel analog output; Built in NMEA 0183, dedicated binary protocol, and over 20 mainstream single/multi beam sonar protocols, which can directly interface with commonly used maritime equipment.