USBL Positioning and Tracking Systems
EvoLogics S2C R USBL modems combine powerful USBL transceiver functionality with full benefits of an S2C technology communication link. S2C R modems with a built-in USBL antenna enable accurate tracking and full-duplex digital communication, delivering an excellent all-round performance. Switching between positioning and communication modes is not necessary: positioning data is calculated simultaneously with acoustic transmissions. Both features complement each other in a fully integrated positioning and communication system.
S2CR USBL devices implement advanced data delivery algorithms, support addressing and networking and are easy to control with a comprehensive set of commands and software-configurable settings.
The S2C R USBL series offers a selection of short- mid- and long-range devices for shallow or deep water applications. Each product is available in a variety of configurations to offer the best-fit solution for a particular scenario.
EvoLogics' underwater acoustic positioning software, SiNAPS, provides easy-to-use display features for real-time tracking of multiple targets, supports interfacing with external instruments and offers advanced data management tools.
Applications for USBL
Positioning of offshore equipment
Highly accurate tracking of offshore equipment during installation to ensure accurate placement at predetermined coordinates
Navigation of ROVs and AUVs
Track positions of multiple ROVs or AUVs and control their missions with instant commands
Locate underwater features with geo-referenced coordinates when used together with GPS or differential GPS
Exchange information with several divers and track their positions during the mission
Track positions of sensors and detectors to enhance measurement accuracy
HOW USBL WORKS
A typical EvoLogics USBL (ultrashort baseline) positioning system is pictured above and operates as follows:
A USBL TRANSCEIVER is mounted on a Vessel and uses acoustic signals to determine the distances and bearings toward tracking targets - for example, to autonomous underwater vehicles (AUVs), remotely operated vehicles (ROVs), towfish etc.
A TRANSPONDER is attached to each target. Transponders reply to acoustic signals from the USBL transceiver with their own acoustic pulses, allowing the transceiver to calculate the targets' positions.
The USBL transceiver measures the time from transmission of its acoustic interrogation signal until an acoustic reply from the Transponder is detected and converts it to distance to the transponder. Containing several transducers separated by a short distance (the ultra-short baseline antenna), the transceiver calculates the angle to a transponder using the phase-difference method.
Optional third-party external instruments (an AHRS sensor and/or a GNSS receiver) provide information about the vessel's orientation and real-world coordinates.
The operator's NAVIGATION COMPUTER is interfaced with the USBL transceiver and the external instruments and is connected to the local computer network.
EvoLogics positioning software, SiNAPS, is installed on the navigation computer and controls the positioning system and provides display features to monitor the mission in real-time.
HIGH SPEED MID-RANGE DEVICES
DEPTH RATED LONG-RANGE DEVICES
S2CR USBL ROV Tracking System for VideoRay ROV
This USBL solution offers high accuracy positioning to VideoRay owners by simply swapping the floating block of the VideoRay. The EvoLogics floating block is self-contained and self-powered, so that even in the case of a broken tether, it still is possible to track the position of the ROV.
MODEM OPTIONS AND ACCESSORIES
For vehicle/platform integration
All EvoLogics S2C Underwater Acoustic Modems and Positioning Systems are available in OEM configuration without housing, ideal in cases where minimal size and weight are critical.
OEM devices feature standard S2C electronics and a cable-mounted transducer, carefully matched to the analog front end unit for best performance.
These systems are ideal for integration into your own products and equipment, such as:
AUVs and ROVs
OEM devices can be configured with most of options and modules available with standard S2C devices.
SiNAPS Tracking Software
S2C intelligent Navigation and Positioning Software
Web-based user interface - use the software on any device
in the local computer network.
Real-time multiple target tracking.
Extensive system configuration options.
Increased positioning accuracy when interfaced with an internal or external AHRS (Attitude and Heading Reference System) sensor and an external
Useful display tools, distance measurement tool, settings management tools.
Advanced data management options: internal database, real-time NMEA data output, customizable data export.