The Fanbeam laser radar sensor from Renishaw’s Spatial Measurement division provides repetitive, high-accuracy dynamic positioning (DP) to offshore support vessels (OSV) and other marine structures in harsh environments. This next-generation system’s control software increases the reliability of its single-target tracking, enabling multiple operator stations for situations in which control needs to be transferred between bridge personnel. The new software’s advanced target tracking and modeling prevent spurious targets from causing a drive off, while the intelligent clutter-rejection capability provides clearer signals for a better understanding of the operational environment, the company says.
The radar uses position data to automatically hold vessels on station during short range operations. The system provides collision avoidance, gangway monitoring and docking assistance on vessels operating in crew supply, anchor handling tug supply, construction support, dive support, dredging and rock dumping capacities. Other applications include seismic source positioning for geophysical exploration vessels and positioning of mine detection equipment.
A laser sensor with a vertically “fanned” output enables observation of returns from passive, retro-reflective targets, despite relative movement of the vessel. Accurate to 20 cm, the laser rotates horizontally in both directions via motorized base, and can be tilted ±15 degrees in the vertical plane using an Autotilt mechanism. The motorized yoke has a software-selectable scanning speed ranging to 50 degrees/sec. with a horizontal range of 0 to 360 degrees and 0.01-degree horizontal resolution. A reflective tube target is used for short-range operations, while various prism cluster target options enable long-range operations.
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