This USBL system is designed for low-cost, medium accuracy localization of underwater objects.
It can be used to guide an ROV to an area of interest, either manually or autonomously.
The system can also locate an ROV among other possible applications.
A complete system requires both a Transmitter and a Receiver.
After calibration, transmitters are paired with specific receivers and should not be interchanged.
The system works by syncing the clocks of a Transmitter and Receiver.
The transmitter then sends a sound pulse once per second. The receiver uses time-of-flight to calculate slant range to the transmitter and phase measurements to determine the arrival angle of the sound pulse.
Technical Details | Values |
Maximum Depth | 100m |
Volume, Receiver Unit | 295 ml |
Mass, Receiver Unit | 278 gm |
Volume, Transmitter Unit | 295 ml |
Mass, Transmitter Unit | 327 gm |
Absolute Maximum Range | 1 km |
Typical Usable Range | 300m |
Apparent Yaw/Azimuth resolution* | 1° |
Apparent Elevation angle resolution* | 1° |
Slant range measurement resolution * | 0.1m |
Slant range error accumulation (typical) | 2 m/hr |
IMU Euler angle accuracy, typical** | 2° |
Update rate | 1Hz |
Ping Frequency | 25 kHz |
Receiver V-in power | 4.5V to 28V DC <1 Watt |
Resolution does not equal Accuracy – ** Magnetic errors not included