•  MRU‑M‑MB2  |  Marine 3‑axis motion reference unit,jlplc
  •  MRU‑M‑MB2  |  Marine 3‑axis motion reference unit,jlplc

 MRU‑M‑MB2  | Marine 3‑axis motion reference unit

No. MRU‑M‑MB2 
Model:    MRU‑M‑MB2 
Product Type:    Marine 3‑axis motion reference unit 
Measurement Ranges    :Roll/pitch: ±180°;
heave: ±10 m;   surge/sway acceleration: ±2 g
Accuracy    Roll/pitch: 0.10°
Output Rate:    200 Hz (real‑time);
Interfaces:    RS‑232/RS‑422 (serial);
Power Supply    :24 VDC (18–36 VDC wide range);
Environmental:    -40℃~+70℃;   IP67
Dimensions    :~120×50×53 mm;
weight ~0.5 kg
  •  MRU‑M‑MB2  |  Marine 3‑axis motion reference unit,jlplc

Desciption

The KONGSBERG MRU‑M‑MB2 (RMP201‑8, MRU2 variant) is a marine motion reference unit (MRU) optimized for vessel attitude monitoring and motion compensation, delivering roll/pitch, heave/surge/sway, and angular rate measurements via MEMS solid‑state sensors + advanced algorithms, ideal for dynamic positioning (DP), ship stabilization, and offshore riser monitoring in harsh marine environments with IP67 protection and 200 Hz high‑speed output.

Core Technical Specifications

Parameter Details
Model MRU‑M‑MB2 (RMP201‑8, MRU2 series)
Product Type Marine 3‑axis motion reference unit (attitude + acceleration)
Sensors Dual high‑precision accelerometers + MEMS angular rate gyros (no moving parts)
Measurement Ranges Roll/pitch: ±180°; heave: ±10 m; surge/sway acceleration: ±2 g
Accuracy Roll/pitch: 0.10° (static RMS 0.03°; dynamic 1‑sigma 0.015°); heave: 0.05 m RMS
Output Rate 200 Hz (real‑time); latency <5 ms for DP control
Interfaces RS‑232/RS‑422 (serial); Ethernet (TCP/IP, UDP); PPS time sync (TTL)
Power Supply 24 VDC (18–36 VDC wide range); typical power 3 W; terminal block
Environmental -40℃~+70℃; IP67 (housed); 2 kV ESD, 1 kV surge immunity
Dimensions ~120×50×53 mm; weight ~0.5 kg (lightweight for bridge/ROV mounting)
Certifications CE; marine class approvals (DNV, ABS, LR); 2‑year factory calibration warranty

Key Features

  1. Solid‑State Reliability: MEMS gyros/accelerometers with no mechanical wear—MTBF >100,000 hours, reducing maintenance costs by 80% vs. mechanical inclinometers in DP systems.
  2. Horizontal Acceleration Suppression: Configurable CG offset compensation eliminates bridge‑mount errors, ensuring 0.03° static roll/pitch accuracy even during vessel turns (vs. 0.5° for uncompensated units).
  3. Dual Communication Redundancy: Serial (RS‑232/422) + Ethernet outputs enable multi‑user data sharing (e.g., DP controller + bridge HMI), avoiding single‑point communication failure.
  4. Plug‑and‑Play Calibration: MRC+ Windows software auto‑configures monitoring points; lever‑arm compensation cuts commissioning time by 60% in offshore rig retrofits.
  5. Harsh‑Environment Resilience: IP67 housing withstands salt spray/immersion; wide‑temperature operation ensures 99.99% uptime in Arctic or tropical seas.
  6.  

Typical Application Scenarios

  • Dynamic Positioning (DP) Systems: Feeds 200 Hz roll/pitch/heave data to DP2/DP3 controllers on FPSOs; reduces position drift by 40% vs. legacy sensors during 5‑m swells.
  • Offshore Riser Monitoring: Measures riser fatigue via real‑time motion data; early anomaly detection cuts unplanned downtime by 35% in deepwater drilling operations.
  • High‑Speed Craft Stabilization: Drives motion damping systems for patrol boats; pitch/roll compensation reduces crew fatigue by 50% in rough seas.
  • Multibeam Echo Sounder Compensation: Corrects wave‑induced roll/pitch; improves seabed mapping accuracy by 30% vs. uncompensated sonars in hydrographic surveys.
  • Helideck Stabilization: Ensures landing safety by maintaining ±0.5° attitude tolerance; triggers alarms if motion exceeds thresholds, meeting IMO standards.

Service & Support

  • Warranty: 2‑year standard warranty + free factory recalibration; expedited replacement (72 hours) for offshore/marine customers with non‑human faults (e.g., sensor drift, communication failure).
  • Technical Support: Pre‑sales CG offset calculation and DP integration design; free MRC+ software for parameter tuning and data logging; on‑site training for class approval compliance with bulk orders.
  • Spare Parts & Upgrades: Compatible with MRU‑MB3 (higher accuracy) and MRC+ Pro software; optional IP68 subsea housing (1,000 m depth) for ROV/AUV applications.
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Related Products

  • KONGSBERG MRC+ Software: Configures MRU, calibrates CG offset, and visualizes motion data.
  • KONGSBERG Seapath 300: Integrates MRU data with GNSS for precise vessel positioning (DP3).
  • KONGSBERG MRU‑H: High‑accuracy heave‑optimized variant for long‑swell offshore operations.
  • KONGSBERG TB‑MRU: Surge‑protected terminal block for serial/Ethernet interfaces.

For MRU‑M‑MB2 CG offset calculation, DP system integration, or bulk quotations, contact:
  • WhatsApp: https://wa.me/+86 19389860630
  • Email: hnjlyori@163.com
    Our KONGSBERG‑certified engineers provide one‑on‑one support for motion compensation design and marine class approval compliance.