DOPPLER VELOCITY LOG – OPERATING CONCEPT
The DVL estimates velocity relative to the sea bottom by sending acoustic waves from the four angled transducers and then measure the frequency shift (doppler effect) from the received echo. By combining the measurements of all four transducers and the time between each acoustic pulse, it is possible to very accurately estimate the speed and direction of movement.
The DVL-A50 is – by far – the world’s smallest commercially available Doppler Velocity Log.
The record breaking 5 cm min altitude makes the A50 extremely useful for working with tools close to the seabed.
With its unbeatable price/performance, the DVL-A50 is now establishing a new market standard.
Key Specifications:
Altitude0.05 – 50meters
Frequency 1MHz
Long Term Accuracy± 0.1cm/s
Finally a DVL suitable for small ROVs/AUVs!
The DVL is designed with small ROVs/AUVs in mind where it can be mounted without adding significant weight or drag to the vehicle.
While the A50 is the perfect fit for small vehicles looking for professional navigation features, the combination of low cost and high performance is also making it very attractive for much larger vehicles.
Advantages by using DVL on your vehicle
Accurate position hold for professional inspections and/or tooling interventions
Accurate micro movements like “move 1 inch to the right”
Travel over great distance and use “dead reckoning” to create the travelled path
Find home even while being out of reach of acoustic positioning systems like Underwater GPS
Accurate flight path which pairs very well with sonar imagery
Combine the DVL with our Underwater GPS system to get a high performance, professional navigation package!
Specifications
MECHANICAL
Device diameter : 66 mm
Device height : 25 mm
Device weight (air) : 250 grams
Device weight (submerged) : 185 grams
Depth rating : 1000 meters
Materials : Stainless steel 316 (housing)
: PEEK (transducer caps)
Operating temperature : -5 to 60 °C
ELECTRICAL / INTERFACE
Input voltage : 10-30 V
Power consumption : 0.25 A at 12V
Power-on current surge : 1.25 A at 12V
Physical interface : 8 wires (pwr/serial/Ethernet)
: 3 meter cable (6.7 mm diameter) with interface module
Indicator : Status LED (Power, Lock)
Communication : UART 115200 baud serial 3,3V
: Ethernet
Protocols : Water Linked API
: PD0 (subset)
ACOUSTIC / PERFORMANCE
Transducer frequency : 1 MHz
Transducer setup : 4-beam convex Janus array
Transducer beam angle : 22.5 degrees
Ping rate : 4-26 Hz (adaptive to altitude)
Sensor assist : Integrated AHRS/IMU (Yost Labs TSS-NANO)
Min altitude : 5 cm
Max altitude : 50 meters
(Performance at altitudes > 35 meter is dependent
on seabed conditions, salinity levels etc.)
Max velocity : 2.6 m/s
Velocity resolution : 0.1 mm/s
Long term accuracy : ±1.01 % (Standard version)
: ±0.1 % (Performance version)
APPROVALS
CE : Yes
CEO : Lee Cheong Jae | Company : SEADRONICS | Business license number : 292-15-01261 | E-mail : seadronics@naver.com
Address : 8F 818, 235(YoungJuDong-Jeil B/D), Daeyeong-ro, Jung-gu, Busan, Republic of Korea 48911 | TEL : +82-70-4024-3123 | FAX : +82-504-440-6938
copyrightⓒ2020 # all rights reserved.
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