Tag: Kongsberg

Kongsberg  MRU-M-MB3  Motion reference device

MRU

Our Motion Reference Units (MRU) are motion sensors ideal for any maritime operation requiring attitude determination and motion compensation, and deliver reliable real-time motion measurements with exceptional accuracy.

KONGSBERG MRUs are designed and manufactured to maximize performance in the most challenging marine environments. Our in-house experts combine state-of-the-art technology with high-quality components, including cutting-edge solid-state gyros and accelerometers, and refined construction and assembly techniques. The result is a product we are proud of, delivering daily excellence with exceptional accuracy and reliability standards for our customers worldwide.

MRU-M-MB3

MRU 5+    MRU 5    MRU E    MRU H    MRU 3    MRU S    MRU 2    MRU D    miniMRU

Roll/pitch Static RMS

0.008°    0.02°    0.03°    0.03°    0.08°    -not applicable or no data    0.03°    0.2°    0.03° – 0.8°

Roll/pitch Dynamic 1-sigma

0.002°    0.005°    0.010°    0.010°    0.010°    -not applicable or no data    0.015°    0.15°    0.005° – 0.1°

Heave Real-time RMS

5 cm/5 %    5 cm/5 %    5 cm/5 %    5 cm/5 %    5 cm/5 %    -not applicable or no data    -not applicable or no data    -not applicable or no data    -not applicable or no data

Heave Period Real-time

25 s    25 s    25 s    25 s    18 s    -not applicable or no data    -not applicable or no data    -not applicable or no data    -not applicable or no data

Heave Delayed RMS

1 cm/1 %    1 cm/1 %    1 cm/1 %    1 cm/1 %    2 cm/2 %    -not applicable or no data    -not applicable or no data    -not applicable or no data    -not applicable or no data

Heave Period Delayed

50 s    50 s    50 s    50 s    50s

MRU-M-MB3

The Kongsberg TRX32 (Part Number: 303088) is a specialized Printed Circuit Board (PCB) module primarily used in Kongsberg Maritime’s high-precision subsea and positioning systems.1

Depending on the specific system configuration, it is most commonly identified as a transceiver or filter board within the HiPAP (High Precision Acoustic Positioning) or Dynamic Positioning (DP) product lines.

Technical Details & Functions

System Integration: It is a core component of the HiPAP system, which is used for underwater tracking and positioning of ROVs, AUVs, and subsea structures.

Core Function: As a “TRX” (Transceiver) module, it handles signal processing, specifically filtering and managing digital communication between the underwater transducers and the topside control unit.

TRX32 303088

Designation: Often listed as TRX32.500 or simply the TRX32 Filter Board.2

Key Features:

Industrial-grade design for harsh marine environments.3

High-precision digital signal processing (DSP) capabilities.

Compatible with Kongsberg’s automation and monitoring frameworks (like K-Chief).

Specifications (General)

TRX32 303088

Attribute    Details

Manufacturer    Kongsberg Maritime (Norway)

Part Number    303088

Model    TRX32 / TRX32.500

Common Application    HiPAP Systems / Dynamic Positioning

Classification    Printed Circuit Board (PCB) / Filter Board

Common Use Cases

Acoustic Positioning: Used to calculate the exact position of underwater objects by processing sound pulses.

Ship Automation: Functions as an I/O or communication module within larger marine control networks.

Digital Cutting Systems: Some industrial suppliers also list this part for use in Kongsberg’s high-precision digital cutting tables (specifically for motion control and sensor data processing)

The miniMRU is a contuinuation of KONGSBERG’s established Motion Reference Unit (MRU) technology designed for embedded applications and integrated solutions where precise attitude measurement is required.

Compact size

Its compact size and low-weight combined with easy interfacing makes it a convenient solution for any application that requires motion compensation, including multibeam echo sounder transducer heads, under water telemetry transponders and fishing sonars.

miniMRU

High accuracy

Available in different versions offering roll and pitch accuracy between 0.03° and 0.08°, the miniMRU range combines 3-axis sensors for linear acceleration and angular rate, complete signal processing electronics and power supply into a single, compact and extremely rugged unit. The system outputs both raw and processed gyro and accelerometer data such as roll, pitch, heave motion, linear acceleration, and angular rate.

Function

The miniMRU can both be used as an IMU or as a sensor for output of processed roll, pitch and heave motion data. The product include the most accurate MEMS linear accelerometers and angular rate sensors available in the world. The miniMRU is delivered with a Windows based configuration software (MRC+). The configuration software communicates with the miniMRU via Ethernet.

Interfaces

The product include two output and input serial lines and Ethernet communication. For time synchronization, the miniMRU accepts 1-second time pulse (1PPS) output on a TTL line (XIN) or as RS-232/422 signal.

Product range:

miniMRU 30 – 0.08° roll and pitch accuracy

miniMRU 40 – 0.08° roll and pitch accuracy

miniMRU 50 – 0.03° roll and pitch accuracy

miniMRU 60 – 0.03° roll and pitch accuracy

miniMRU

The MRU D is the fifth generation roll and pitch motion sensor specially designed for marine applications, ideal for roll and pitch measurements on board ships.

The sensor is paramount within voyage recording, dynamic positioning systems, fishing sonars, and telecommunication antenna systems. Its precise orientation requirements and limited range make it best suited for applications where consistent roll and pitch data are necessary.

For applications requiring unrestricted mounting orientation or range, other MRU models with three-axis sensors are recommended.

Optimized Design and Performance

For proper functioning, the MRU D unit must be mounted with the connector oriented vertically, and is best paired with systems that have a restricted range in roll and pitch motions.

The accuracy of roll and pitch measurements remains unfazed even when the sensor is positioned away from the vessel Center of Gravity (CG) thanks to its ability to reduce the impact of horizontal acceleration on performance.

This advanced suppression ability sets the MRU D apart from standard inclinometers, pendulous units, and Vertical Reference Units. Moreover, every MRU D device comes with a Calibration Certificate, affirming its tested precision and compliance with stipulated standards.

Adaptability and Convenience

Data from the MRU D is readily available through distinct communication channels including serial lines and an Ethernet interface, ensuring easy distribution to multiple onboard users.

The data outputs are adjustable and can be transmitted in different formats such as IEEE 32-bit floats or scaled integers.

Additionally, the sensor can furnish NMEA 0183 proprietary sentences, illustrating its compatible use within varied digital interfaces.

Key features

0.35° roll and pitch accuracy

Outputs real-time roll and pitch measurements

Suppression of horizontal acceleration when mounted off the vessel Center of Gravity (CG)

Outputs on RS-232. RS-422. and Ethernet

High output data rate (200 Hz)

High reliability and no scheduled maintenance, no mechanical wear-out parts

Small size, light weight, and low power consumption

Each MRU delivered with Calibration Certificate

Selectable communication protocols in the Windows-based MRU configuration software

The MRU S roll, pitch and heave motion sensor is specially designed for fish-finding equipment.

It incorporates advanced Micro-Electro-Mechanical-System (MEMS) sensors for both linear acceleration and angular rate, ensuring high reliability with solid-state sensors that have no rotational or mechanical wear-out parts.

Designed to perform even in rough weather conditions, MRU S provides vital vessel motion data for an undisturbed display on the Fish-finding equipment.

Enhancing Sonar Efficiency

Typically utilized for real-time compensation of roll, pitch, and heave data in fishery sonars and echosounders, the MRU S significantly improves the quality of underwater acoustic images.

The output variables like roll, pitch, and heave, along with linear acceleration and angular rate, contribute to a clear and reliable display irrespective of wave motion induced distortions.

The sensor’s performance is crucial for operations conducted in challenging sea conditions.

Advanced Connectivity and Output

The MRU S is capable of delivering data through an Ethernet interface and serial lines, providing flexibility for on-board data distribution among multiple users.

Customizable output protocols support a variety of sonar equipment and enable simultaneous heave measurements at different points via a single serial line or Ethernet port.

This versatility ensures that the MRU S can integrate seamlessly with a diverse array of marine electronic systems.

Key features

0.3° roll and pitch accuracy

Outputs real-time roll, pitch and heave measurements

Outputs on RS-232. RS-422 and Ethernet

High output data rate (200 Hz)

Lever arm compensation to two individually configurable monitoring points

Small size, light weight and low power consumption

Each MRU delivered with Calibration Certificate

Selectable communication protocols in the Windows based MRU configuration software

MRU 3 is the fifth generation roll, pitch and heave motion sensor designed especially for heave compensation applications, such as for use with echosounders, fishing sonars and offshore cranes.

This product stands out by delivering precise heave measurements that adhere to IHO standards, providing functionality critical for maritime operations.

Advanced Sensor Technology for Precision

This cost-effective MRU 3 model is built on 3-axis Micro-Electro-Mechanical-Structures (MEMS) sensors, providing accurate and reliable measurements for both linear acceleration and angular rate, thanks to solid state sensors with no rotational or mechanical wear-out parts.  The MRU 3 also comes with a Windows-based configuration and data presentation software, which allows for defining vector arms from the MRU’s mounted location to the centre of gravity (CG) and two configurable monitoring points.  These precise outputs and configuration options make the MRU an invaluable tool for maritime operations.

Superior Data Integration and Output

MRU 3 stands out with its ability to deliver real-time roll, pitch, and heave measurements along with linear acceleration across three axes.  The unit outputs heave position and velocity and the angular rate vectors for roll and pitch.  With the latest PFreeHeave algorithm, MRU 3 can output correct and phase-free heave data, an advantage for applications such as seabed mapping.  Utilizing external speed and heading input together with time synchronization features, the MRU 3 ensures improved accuracy even during vessel turns and accelerations.

Optimized Connectivity for Various Applications

MRU 3

Ensuring versatility for users, the fifth generation MRU is equipped with Ethernet interface and serial lines that allow for easy data distribution to multiple users on board the vessel.  The unit boasts a high data output rate and compatibility with various digital I/O protocols, ensuring seamless operation with commonly used survey equipment.  In addition, the MRU 3 features selectable communication protocols in its configuration software, underscoring the sensor’s adaptability to specific maritime data systems and requirements.

Key features

0.08° roll and pitch accuracy

Outputs real-time roll, pitch, and heave measurements

Outputs on RS-232. RS-422. and Ethernet

High output data rate (200 Hz)

Precise heave at long wave periods by use of PFreeHeave algorithms

Lever arm compensation to two individually configurable monitoring points

Small size, light weight, and low power consumption

Each MRU delivered with Calibration Certificate

Selectable communication protocols in the Windows based MRU configuration software

Export license not required

MRU H, the versatile heave compensator, represents the fifth generation MRU specially designed for heave compensation applications.

As an ideal sensor for a range of marine applications requiring highly accurate heave measurements, this unit enhances the precision in environments with extreme horizontal accelerations.

Enhanced Applications and Output Variables

The MRU H is an essential instrument constructed for precise motion measurements in marine environments.  With applications that stretch from offshore cranes to echo sounders, it is also valuable for ship motion monitoring, helideck motion monitoring, hydroacoustic positioning systems, and hull stress monitoring.  Its output encompasses significant data such as roll, pitch, and heave alongside linear acceleration in 3-axes, enabling accurate heave position, velocity, and acceleration in adjustable frames with additional outputs like angular rate vectors.

Advanced Functionality and Algorithm Utilization

Embodying three accurate accelerometers and MEMS angular rate gyros, the MRU H achieves remarkable reliability with no rotational or mechanical wear-out components.  A distinctive feature of its function is the PFreeHeave algorithm, which uses historical measurements to deliver a precise, phase-free heave signal.  This is especially beneficial in conditions of long swell or for seabed mapping applications that can utilize slightly time-lagged heave signals.

MRU H

Seamless Configuration and Data Integration

Accompanied by user-friendly Windows-based configuration software, the MRU H allows for meticulous calibration of monitoring points and alignment with the vessel’s center of gravity.  It offers multi-point heave measurement outputs and compatibility with various protocols for seamless data sharing across multiple users.  This capability underscores its adaptability to diverse operational needs while ensuring widespread accessibility through established data communication standards.

MRU H

Key features

0.05° roll and pitch accuracy

High accuracy heave measurements even in dynamic environments

Outputs on RS-232. RS-422. and Ethernet

High output data rate (200 Hz)

Precise heave at long wave periods by use of PFreeHeave® algorithms

Lever arm compensation to two individually configurable monitoring points

Meets IHO special order requirements

Small size, light weight, and low power consumption

No limitation to mounting orientation

Each MRU delivered with Calibration Certificate

Selectable communication protocols in the Windows-based MRU configuration software

MRU E is the fifth generation roll, pitch, and heave motion sensor with an extended temperature range, making it ideal for marine applications.

It is designed to function in ambient temperatures ranging from -25 to +70°C.

Suitable for installation in various locations such as open decks, cabinets, or bulkheads, MRU E is an essential component for systems that require accurate motion measurements.

Optimized for Helideck Monitoring Systems

The MRU can be strategically positioned directly beneath the helideck center to measure 3-axes linear accelerations along with roll, pitch, and heave, crucial for Helideck Monitoring Systems.

It serves to inform about the helideck location when it is apart from accommodation and the hull areas.

Complying with HCA requirements, the MRU E measures helideck acceleration to calculate the Motion Severity Index (MSI), an important safety metric in marine operations.

Specialized Algorithms for Enhanced Performance

The MRU E utilizes the PFreeHeave algorithm to deliver a precise and phase-free heave measurement based on past data. This functionality is particularly beneficial in long swell conditions, and is essential for applications such as seabed mapping that can accommodate a slight delay in the heave signal. To ensure the greatest accuracy in heave, roll, and pitch, especially during turns and accelerations, the sensor accepts external inputs, including separate speed and heading information via serial lines or Ethernet.Key features

0.05° roll and pitch accuracy

Outputs real-time heave, roll, pitch and linear acceleration measurements

Outputs on RS-232. RS-422 and Ethernet

High output data rate (200 Hz)

Each MRU delivered with Calibration Certificate

No limitation in mounting orientation

Lever arm compensation to two individually configurable monitoring points

Meets HCA requirements

Small size, light weight and low power consumption

Selectable communication protocols in the Windows based MRU configuration software

The MRU 5+ product is upgraded with the best MEMS based gyro technology available.

With exceptional low angle noise and bias stability, the product is ideal for integrated INS/GNSS systems and demanding survey applications.

Precision and Reliability

The MRU 5+ provides documented roll and pitch accuracy of 0.008° and angle noise less than 0.002°.

Every unit is delivered with an individual calibration certificate documenting this accuracy.

This is made possible by use of accurate inertial sensors including three rate gyros and linear accelerometers of excellent tactical navigation grade performance.

Very high reliability is achieved by using solid-state sensors with no moving parts and the proven MRU electrical and mechanical construction.

Advanced Motion Sensing Technology

The PFreeHeave algorithm uses past measurements to output a correct and phase-free heave from MRU 5+.

It has an advantage in long swell conditions and for applications that can utilize a heave signal that is delayed some minutes, typical for seabed mapping applications.

Additionally, a new MEMS based gyro is developed by Kongsberg Seatex AS called MRG5 (Mru Rate Gyro) model 5.

MRU5

The MRG5 is optimized for use in high-end applications.

The MRU rate gyro combines very low noise, excellent bias stability and outstanding gain accuracy and is the best MEMS rate gyro available for maritime applications.

Ease of Integration and Application Flexibility

Interfacing the MRU 5+ to various sonar systems is made easy by including data protocols for the most commonly used multibeam echo sounder systems in the software.  Using the configuration cable and the Windows version of the configuration software, MRC+, a series of simple menu prompts allow the user to choose the optimum configuration for his application.  The MRU 5+ and the MRC+ software are flexible and can accommodate a wide variety of application types.

MRU5

Key features

0.008° roll and pitch accuracy

Exceptional low angle noise and bias stability

High output data rate (200 Hz)

Outputs on RS-232. RS-422 and Ethernet

Precise heave at long wave periods by use of PFreeHeave algorithm

Each MRU delivered with Calibration Certificate

No limitation in mounting orientation

Lever arm compensation to two individually configurable monitoring points

Meets IHO special order requirements

Small size, light weight, low power consumption

MRU 2. the fifth generation roll and pitch motion sensor, is designed for high accuracy roll and pitch measurements in marine applications.

This unit, which must be fixed in a specific direction relative to the ship, is particularly suited for applications with a limited roll and pitch range.

It is essential for many uses such as offshore riser monitoring systems, dynamic positioning systems, telecommunication antenna systems, and motion damping systems on high-speed crafts.

Advanced Sensing Functionality

Boasting two highly precise accelerometers and MEMS angular rate gyros, MRU 2 is distinguished for its reliability that stems from solid state sensors without rotational or mechanical parts prone to wear.

MRU 2

It comes with Windows-based software for configuration and data presentation. When positioned high up in a ship, such as on the bridge, the MRU 2 outperforms inclinometers and standard Vertical Reference Units due to its capability to suppress horizontal accelerations affecting roll and pitch measurements.

Operational Design and Output

The MRU 2 outputs both static and dynamic roll and pitch angles, along with corresponding angular rate vectors.

Furthermore, it delivers surge and sway accelerations. Offering digital I/O protocols,

MRU data can be accessed via Ethernet interface and serial lines which enable the easy distribution of data to multiple users on board.

Key features

MRU 2

0.10° roll and pitch accuracy

Outputs high accuarcy roll and pitch measurements

Suppression of horizontal acceleration when mounted off the vesselCenter of Gravity (CG)

Outputs on RS-232. RS-422 and Ethernet

High output data rate (200 Hz)

High reliability and no mechanical wear-out parts

Small size, light weight and low power consumption

Each MRU delivered with Calibration Certificate

Selectable communication protocols in the Windows based

MRU configuration software