Dynamic Motion System (DMS)

The Tensa DMS introduces a new paradigm for determining when it is safe to lift and choosing the correct crane chart to use for offshore lifting.

The DMS is an extremely powerful multi-function inertial and position information system designed to provide decision support information and data for offshore marine operations. It provides:

• Vessel motions (heave, heave velocity, heave acceleration, unfiltered accelerations, angular rates)
• Attitude (heading, pitch and roll)
• Position and GPS data (lat, long, northings, eastings, elevation, velocity)

It incorporates a wireless communication system as well as the ability to connect over long distances (up to 500m) by wire as well as USB connection to a PC. The application software that runs on the host PC can view and log the data from multiple sensors and provide real time differential data using the information from 2 sensors. The system is designed to be user friendly, intuitive and to operate without the need for any supporting technicians or significant training. It is also designed to be extremely robust, highly portable and very cost effective.

Applications include:

• Offshore lifting (vessel heave velocity monitoring) – the DMS gives a graphical output of the load velocity and allows a crane operator to see the vessel heaving in real time. He can then predict when lulls are likely to occur between large wave sets. The systems logging capability offers the ability to record the actual conditions during the lifts. The DMS is equipped with a GPS which allows the load position relative to the crane centre to be displayed. These facilities give the software the capability to recommend a dynamic factor, choose the crane chart and define the crane capacity at the current load radius
• Vessel motion monitoring – the DMS can be used to monitor the motions of a towed vessel using its telemetry link. The logging and monitoring computers can be on the towed barge, on the tow vessel or in both locations. Log files can be archived daily. Remote desktop can be used to view data in real time over the internet. Vessel motion monitoring is also used to determine if conditions are suitable for personnel transfer
• Vessel position monitoring – the wireless linked GPS system can be used as a simple remote position indicator. It has a range of up to 1km in standard form. This is ideal for monitoring the position of moored or standby vessels, mooring buoys etc. Output can also include each vessel’s position, heading, speed and motions. The sensors could also be mounted on buoys to monitor anchor locations or to monitor wave conditions.
• Helideck monitoring – the DMS can provide motion monitoring information of offshore helidecks for assessing whether it is safe to operate. At this stage the system does not provide the meteorological data to be CAP437 compliant
• Custom applications – Tensa can provide custom solutions using this hardware and data management platform

DOWNLOAD THE DMS BROCHURE HERE

DOWNLOAD A TECHNICAL PAPER EXPLAINING WHY THE DMS INCREASES CRANE CAPACITY AND SAFETY OF OFFSHORE LIFTING OPERATIONS

Tensa offers three DMS models: