DVL Actual Minimum Altitude for tracking

Third Party Products Sonar and Acoustics
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Hi,

My Issue is that the DVL-A50 I mounted ~5cm off the bottom of the blueROV2 loses tracking, where the “velocity valid” gets the red cross sign constantly, when the ROV is sitting at the bottom of the pool bed. The spec sheet states a minimum altitude of 5cm which is the case when the ROV is at the bottom.

When I make the ROV hover a bit higher, (where the DVL dashboard shows a 0.4m altitude), the tracking improves a bit, but the “velocity valid” still gets the red cross sign every ~10s.

I have mounted the DVL-A50 to the BlueROV2 Heavy following the installation guide from BlueRobotics. I have enabled acoustics, waited for >10min for temperature to equalise, and calibrated the gyro when stationary.

Did I miss any settings? Thank you in advance.

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Hi @gavingavinchan -
Those specifications for the minimum distance are correct, however you’re unlikely to achieve them in a tank or pool! In open ocean or a large enough body of water, the lack of multipath means better performance can be achieved…

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Hey all,

This might be a silly question, but does the DVL provide altitude measurements like the ping echo sounder would? Would this be more accurate than the ping sounder?

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It does provide altitude measurements. But I have not compared its performance with the ping sounder.

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