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3D Obstacle Avoidance Sonar 3248
The Model 3248 3D Obstacle Avoidance Sonar is a forward looking active underwater acoustic device that provides a 3D real-time display of the area ahead of a vessel. The OAS is designed to aid in the pilotage of ROV's / AUV's and avoidance and detection of submerged objects such as divers and unmanned vehicles. The OAS scans both horizontally and vertically to produce a three dimensional representation of the area in front of the sonar up to a maximum range of 250m. The transducer array can be either ROV / AUV or vessel mounted and connects by cable to the Power Supply Unit, which is normally mounted inside the vessel. The sonar is controlled from an external computer via an Ethernet connection and may be operated in either a real-time 3D imaging mode or in obstacle avoidance mode. The sonar scans a horizontal sector of 90° and a vertical sector of 20° simultaneously for every “ping” of the transmitter. The transmit beams can be steered and linked to the pitch value of an MRU to stabilise the beams within the water column. The receive beams are dynamically focused for each range cell. The system software can operate the sonar in a 2D mode for a faster update rate and then switch to 3D mode for a more detailed representation of the area scanned. A motion reference unit can be integrated into the system to stabilise data from the sonar in response to pitch / roll movement. Optional GPS input and chart overlays can be added for harbour surveillance.
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Marine Electronics Ltd.
Underwater Acoustic Engineering.
