Omniscan 450 Imaging Sonar Basics
Omniscan Product types
Note: The OS450 FS and OS450 SS look different but share the same electronics. The OS450 SS has a slightly longer transducer area, which provides a longer range (150m vs 100m.) The model designations specify Forward Scanning (FS) and Side Scanning (SS), but both can be used in either application.
OS450 FS transducer and electronics, in one case
OS450 SS transducer and electronics are separated. A water-tight compartment is needed for the PCB.
Omniscan 450: Doppler Motion Tracking Considerations
Cerulean SonarView and Omniscan work seamlessly to “mosaic” sonar images in real-time as your vehicle moves. While Omniscan detects angular motion, positional information is required to perform translational scanning. On surface vessels with GPS, this is not a problem; to get the same results in an ROV, an underwater positioning system such as a DVL is required.
For underwater vehicles without positioning information, Omniscan’s Doppler Position Tracking provides an alternative to generate translational information in the direction of the beam.
Omniscan 450 Configurations: Single OS450 Forward-looking
Configuration of one OS450 in front of the vehicle.
Both the OS450 FS and OS450 SS can be used. The decision is driven by the product packaging and possibly the need for the OS450 SS’s 150m range versus the OS450 FS’s 100 m range.
ROV with a single Omniscan 450 installed and performing angular scan sweeps.
A close-up of the angular scanning sweep performed with a single Omniscan set-up.
Omniscan 450 Configurations: Dual OS450 (Right Angle)
The right-angle configuration consists of one OS450 in front of the vehicle and one on the side.
Both the OS450 FS and OS450 SS can be used. The decision is driven by the product packaging and possibly the need for the OS450 SS’s 150m range versus the OS450 FS’s 100 m range.
ROV with a dual Omniscan 450 installed and performing angular and translational scan sweeps.
A close-up of the angular scanning sweep performed with a dual Omniscan set-up.
Omniscan 450 Configurations: Single OS450 (Side Scan)
The Side Scan configuration consists of one OS450 on either side of the Vehicle. Note: What produces a side scan sweep is a translational (not angular) scan and not whether the OS450 is mounted in front or on the side.
Both the OS450 FS and OS450 SS can be used. The decision is driven by the product packaging and possibly the need for the OS450 SS’s 150m range versus the OS450 FS’s 100 m range. A DVL (or GPS for AUVs) is required to generate the translational information.
ROV with one Omniscan 450 installed and performing a translational scan sweep.
A close-up of the translational scan sweep performed with a single Omniscan set-up.
Omniscan 450 Configurations: Dual OS450 (Side Scan)
The Side Scan configuration consists of two OS450 on the side of the Vehicle.
Both the OS450 FS and OS450 SS can be used. The decision is driven by the product packaging and possibly the need for the OS450 SS’s 150m range versus the OS450 FS’s 100 m range. A DVL (or GPS for AUVs) is required to generate the translational information.
ROV with two Omniscan 450 installed and performing a translational scan sweep.
A close-up of the translational scan sweep performed with a dual Omniscan set-up.