Tasman DVL

Description

The Teledyne RD Instruments Tasman DVL is a phased-array Doppler velocity log (DVL) available in 600 kHz and 300 kHz versions. It provides bottom tracking, water tracking and acoustic Doppler current profiling (ADCP) for vehicles from small ROVs to large diameter AUVs, and from USVs to crewed surface ships. The phased-array transducer is field-replaceable, and the Tasman DVL is designed as a drop-in replacement for the previous-generation TRDI Workhorse Navigator.

The 600 kHz Tasman DVL bottom tracks from 0.15 m to 100 m altitude (160 m with XRT), and the 300 kHz version from 0.3 m to 275 m (up to 500 m with XRT). Long-term bottom-track accuracy is ±0.06 % ±0.1 cm/s below 4 m altitude for the 600 kHz version and ±0.08 % ±0.1 cm/s below 8 m altitude for the 300 kHz version. Water profiling range is 60 m (600 kHz) or 150 m (300 kHz), and the 4-beam phased array has a nominal beam angle of 30°.

Both versions of the Tasman DVL are rated to 6000 m, measure 18.73 cm diameter × 17.4 cm high and weigh 8.7 kg in air and 4.4 kg in water. Input voltage is 10.7–36 VDC (600 kHz) or 12–36 VDC (300 kHz), and communication is Ethernet and RS232, with RS422 as a factory-installed option. A health monitor reports transducer health, leak detection, pressure cycles, maximum pressure, over pressure and operating time, and an SBG Ellipse2-A AHRS is available as an option.

Technical Specification

Versions

600 kHz and 300 kHz

Bottom track maximum altitude

100 m, 160 m with XRT (600 kHz); 275 m, up to 500 m with XRT (300 kHz)

Bottom track maximum altitude, conditions

@ 5 °C and 35 ppt salinity, @ max V; 300 kHz with XRT: 420 m in typical conditions, up to 500 m in ideal conditions

Bottom track minimum altitude

0.15 m (600 kHz); 0.3 m (300 kHz)

Bottom track velocity range

±1.6 m/s (<0.35 m altitude); ±9 m/s (>0.35 m altitude), no tilt

Bottom track long-term accuracy (footnote ECCN: 6A001)

±0.06 % ±0.1 cm/s (<4 m altitude), ±0.2 % ±0.1 cm/s (>4 m altitude) (600 kHz); ±0.08 % ±0.1 cm/s (<8 m altitude), ±0.3 % ±0.1 cm/s (>8 m altitude) (300 kHz)

Bottom track long-term accuracy (footnote ECCN: 6A991)

±1.15 % ±0.1 cm/s (600 kHz and 300 kHz)

Precision @ 1 m/s

±0.5 cm/s @ ½ alt. (600 kHz); ±0.6 cm/s @ ½ alt. (300 kHz)

Resolution

0.01 mm/s

Maximum ping rate

12 Hz (600 kHz); 7 Hz (300 kHz)

Water profiling maximum range (beam @ 45°)

60 m (600 kHz); 150 m (300 kHz)

Water profiling minimum range

1.9 m (600 kHz); 4.5 m (300 kHz)

Water profiling velocity range

±12 m/s (600 kHz); ±17 m/s (300 kHz)

Water profiling long-term accuracy

±0.3 % ±0.1 cm/s (600 kHz); ±0.6 % ±0.1 cm/s (300 kHz)

Center frequency

614.4 kHz (600 kHz); 307.2 kHz (300 kHz)

Source level (re 1 µPa)

217 dB @ 1 m (600 kHz); 220 dB @ 1 m (300 kHz)

1-way beam width

2.2° (600 kHz); 2.7° (300 kHz)

Number of beams

4, phased array

Beam angle (nominal)

30°

Bandwidth (nominal)

6.25 % of center frequency

Maximum operating depth

6000 m

Operating temperature

−5 to 45 °C

Storage temperature

−30 to 60 °C

Health monitor

Transducer health, leak detection, pressure cycles, maximum pressure, over pressure, operating time

Leak detection

Electronic housing

Pressure sensor

600 bar (6000 m)

Inclinometer

Dual-axis digital inclinometer

AHRS

SBG Ellipse2-A (450 deg/s) (optional)

Dimensions

18.73 cm diameter × 17.4 cm high

Weight

8.7 kg in air, 4.4 kg in water

Average power (typical, @ 24 VDC input)

5.4 W (600 kHz); 11.8 W (300 kHz)

Quiescent power input

1.4 W

Quiescent power with Ethernet

2.3 W

Voltage

10.7–36 VDC (600 kHz); 12–36 VDC (300 kHz)

Peak current (typical)

1.8 A (600 kHz); 5.4 A (300 kHz)

Communications

Ethernet and RS232; RS422 (optional, factory installed only)

Standard data outputs

Single-ping bottom-track velocity variance; bottom track velocity; altitude (4 individual measurements); error velocity (data quality indicator); acoustic echo intensity; water track velocity; temperature; current profiling (optional)

Real-time outputs for INS coupling

Standard deviation and time of validity

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