Olex Integrates Spatial Inertial Navigation System into Marine Vessels

Nexans Olex has successfully integrated Spatial, an inertial navigation system, into its hydrographic vessel. Spatial is a ruggedised miniature GPS-aided inertial navigation system and AHRS that provides accurate position, velocity, acceleration and orientation. It combines temperature-calibrated accelerometers, gyroscopes, magnetometers and a pressure sensor with an advanced GNSS receiver. Olex was seeking a new inertial navigation system in their multibeam sonar mapping systems for two key reasons. Firstly, they needed more accurate position and orientation data than their existing inertial navigation system could provide. Secondly, affordability was a central objective to help widen the market for inertial motion sensors and bring in... (read more)
2017-12-20 01:58:47

The Arctic Field Party

It seems ironic that in the early stages of the Cold War, the United States Government sent surveyors and hydrographic engineers to the coldest reaches of the North American continent. For these men, it was truly a Cold War. From 1945 through 1953, field parties of the United States Coast and Geodetic Survey were sent to survey sea routes through the Bering, Chukchi and Beaufort Seas as well as to conduct geodetic surveys to help position Distant Early Warning system radars and help delineate the vast resources of the Alaskan Arctic. These men toiled in obscurity beneath the midnight sun... (read more)
2017-07-04 11:00:42

High-performance OEM GNSS Sensor for System Integrators

Trimble has introduced the Trimble ABX-Two OEM GNSS sensor. The ABX-Two delivers precise heading, pitch, roll and 3D positioning information. With two internal MB-Two modules, the ABX-Two offers a third antenna option that provides a drift-free, absolute attitude solution. The ABX-Two is an ideal solution for a wide variety of applications such as agriculture, automotive, aviation, construction and marine systems. The ABX-Two is a compact, lightweight and weatherproof enclosure that is built around two MB-Two modules. The sensor allows a wide range of voltage inputs and maintains low-power consumption regardless of the voltage. The ABX-Two speeds the integration process with... (read more)
2017-04-10 01:03:06

New-generation Ekinox Series of Inertial Sensors

SBG Systems is launching the Ekinox 2 Series of compact inertial navigation systems. With new accelerometers and gyroscopes, Ekinox 2 attitude accuracy has been enhanced by a factor of two while improving resistance to vibrations and integrating the Beidou constellation, according to SBG Systems’ data. Ekinox Series is a line of tactical grade MEMS-based inertial navigation systems. SBG Systems achieved an accuracy that is twice the performance of the Ekinox 1 Series. This improvement is due to a complete redesign of the in-house Inertial Measurement Unit (IMU) integrating new gyroscopes and accelerometers. Suited for Mobile Mapping With the same form... (read more)
2017-03-21 08:37:03

Ocean Business Ready for Business

Hands-on Update on Ocean Technology – Science and Business
The bi-annual event Ocean Business is coming to the NOC, Southampton from 4-6 April 2017. Three days of ocean technology engineering and science, knowledge sharing, hands-on training and demos as well as networking. The exhibition space is completely sold out, including more than 340 exhibitors. A selection of the businesses represented give a taster of their innovations in this preview. Better still, of course, is to come and see and experience for yourself! Ocean Business is more than just a trade show. There will also be seminars, workshops by suppliers, a general conference as well as a conference organised by... (read more)
2017-03-13 02:39:32

Improvements to Ellipse Series

SBG Systems has released a new version of the Ellipse Series, its product line of miniature inertial sensors. The Ellipse has been improved, showing increased performance in attitude and heave measurement while adding Galileo constellation to its GNSS receiver. With low noise gyroscopes and new high performance accelerometers providing superior noise level, the accuracy of every Ellipse models has now improved from 0.2° to 0.1° in roll and pitch. In addition, the new accelerometers tolerate very high vibration environments (up to 8g). The Ellipse-N model is an all-in-one inertial sensor that embeds a L1 GNSS receiver. Ellipse-N is already compatible... (read more)
2017-03-09 11:32:46

Impact Subsea Launches ISM3D AHRS

Impact Subsea has announced the launch of a groundbreaking underwater Attitude & Heading Reference System - the ISM3D. It utilises high-grade MEMS-based accelerometers, angular rate gyroscopes and magnetometers that feed into a fusion engine driven by a dual-core micro-processor. The unit provides heading to ±0.5° of local magnetic north with pitch and roll to ±0.05° accuracy. For optimal performance, a hard and soft iron calibration can be performed on the unit once installed on the ROV, AUV or other underwater platform. This ensures that a consistently accurate heading is provided at all times. In areas where a large amount of steel... (read more)
2017-03-07 02:55:36

High-resolution Structural Inspection of a Flooded Tunnel

Using BlueView T2250 360° Multibeam Profiling Sonar and Teledyne PDS Software
Acquiring accurate data on the structural integrity of submerged tunnels, as well as shafts and underwater caverns, has long been a challenging and costly problem for water companies, hydroelectric schemes and mine operators alike. While dewatering of tunnels is one option this can cause additional stress which can cause harm to such assets thereby compounding the problem. This article has been brought to you by Teledyne BlueView and Teledyne PDS Dewatering can also be a costly process to undertake and may also lead to loss of productivity in some circumstances. While Remotely Operated Vehicles (ROVs) have been used for some years... (read more)
2017-02-06 09:13:22

Technology in Focus: Acoustic Doppler Current Profilers (ADCP)

Widespread Applications Stem from Diverse Measurement Capabilities
Rather than a spinning propeller, the Acoustic Doppler Current Profiler (ADCP) – just like dolphins and bats – uses sound to explore its environment. Operating underwater, the method works like hand-held radars used by police to catch speeding motorists. This article explains the technique of this frequently used type of instrument and some of its applications. A sound burst is emitted by the ADCP along beams angled downward. Echoes are returned due to scattering off particles carried by water currents. A second burst can be used to track movement over the seabed. By analysing these sound echoes, the ADCP makes... (read more)
2017-01-25 08:53:33

New Research Vessel for Virginia Institute of Marine Science

Virginia Institute of Marine Science of Gloucester Point, VA, USA, awarded a contract to Meridien Maritime Reparation of Matane to construct a 93-foot research vessel. JMS Naval Architects designed the research vessel to replace VIMS’s current vessel, the R/V Bay Eagle. The new vessel will be capable of conducting fisheries assessments of greater capacity, in deeper waters and with a larger science complement than the Bay Eagle. The primary mission of the Institute’s fleet is to provide inshore and offshore work platforms for the support of fisheries related oceanographic research projects. In addition, the new vessel will greatly expand VIMS’s capability to... (read more)
2017-01-13 09:38:41
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