Description
Product Specification: KONGSBERG MRU-E-JB3 Motion Reference Unit
KONGSBERG MRU-E-JB3 is a fifth-generation motion reference unit (MRU) designed for marine applications, providing high-precision measurements of roll, pitch, and heave motion. It is optimized for challenging environments, including offshore operations, dynamic positioning systems, and helicopter deck monitoring.
1. Product Description
The MRU-E-JB3 is a compact, rugged sensor that combines solid-state MEMS gyroscopes and accelerometers to deliver real-time motion data. Key features include:
- 3-Axis Motion Tracking: Measures roll, pitch, and heave with exceptional accuracy.
- Wide Temperature Range: Operates in ambient temperatures from -25°C to +70°C, suitable for extreme marine conditions.
- Helideck Monitoring: Complies with Helicopter Capability Assessment (HCA) requirements, calculating Motion Severity Index (MSI) for safe helicopter operations.
- Phase-Free Heave: Uses pFreeHeave algorithm for delayed heave measurements, critical for applications like seabed mapping.
2. Technical Parameters
| Parameter | Specification |
|---|---|
| Roll/Pitch Accuracy | Static RMS: 0.03° Dynamic (1σ): 0.010° |
| Heave Accuracy | Real-time RMS: 5 cm or 5% Delayed RMS: 1 cm or 1% |
| Heave Period | Real-time: 25 s Delayed: 50 s |
| Data Output Rate | 200 Hz (high-speed applications) |
| Communication | RS-232, RS-422, Ethernet (selectable protocols via software) |
| Power Supply | 100–240V AC (via built-in XP Power ECL15US24-E module) Output: 24V DC, 0.63 A |
| Weight | 6.89 kg (including power supply) |
3. Application Areas
- Marine Operations: Helideck monitoring, dynamic positioning (DP), and offshore crane control.
- Hydrography: Seabed mapping and sonar motion compensation.
- Energy: Vessel-mounted sensor platforms for subsea operations.
4. Key Features & Advantages
- Lever Arm Compensation: Corrects measurements based on mounting position relative to the vessel’s center of gravity.
- Redundancy: Dual communication buses (e.g., Ethernet + serial) for fault tolerance.
- Modular Design: Configurable via Windows-based software for specific monitoring points.
- Certifications: Meets HCA, DNV GL, and IMO standards.
5. Supplier & Pricing
- New Units: Pricing varies by configuration (e.g., with/without power supply).
- Refurbished Units: Available from marine suppliers like.
- Authorized Dealers: KONGSBERG Maritime, global distributors, and industrial automation suppliers.
6. Notes
- Model Variant: The -JB3 suffix likely denotes a specific configuration (e.g., built-in power supply).
- Installation: Requires secure mounting and lever arm calibration for accurate measurements.
