[PSUBS-MAILIST] Blue Robotics Sonar

[Alan via Personal_Submersibles]

Hank,
on the blue robotics site there is a video on their new sonar & it shows
the sonar pointing upward & showing the distance to the surface.
I think they graphed the tidal heights with it.
Also it's important if you are shooting through a hull or putting the transducer
in a housing that you don't have any air gaps between the transducer & hull or 
housing or bubbles in epoxy, as it won't work through air.
Cheers Alan

> On 6/02/2019, at 8:15 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> It just doesn't make sense to me?  I thought the sound had to hit a more dense material than air to bounce back.  it is great if it works- I will have to give it a try when the ice melts.
> Hank
> 
> On Tuesday, February 5, 2019, 8:46:00 AM MST, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Pretty sure the beam reflects off the water surface.
> 
> 
> From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org> 
> Sent: Friday, February 1, 2019 10:54 AM
> Subject: Re: [PSUBS-MAILIST] Blue Robotics Sonar
> 
> Brian, 
> Have you tested the Hummingbird pointing strait up?  I didn't think that would work because there is nothing for it to bounce back against.
> Hank
> 
> On Friday, February 1, 2019, 7:44:42 AM MST, Brian Hughes via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> In the original configuration of Harold, Maynard attached a transducer to the front of the starboard side thruster. I assume he did so as a way to easily shift direction, up to get depth bouncing off surface, spin the thruster down for depth, forward for collision avoidance.
> 
> Here's the upgrade:
> 
> 1) transducer always pointed up for a Humminbird HDR 650. Basically a digital depth gauge. Small and accurate. Works well.
> 
> 2) Raymarine Dragonfly 4 Pro aimed down to give depth below and detailed image of what's under me. Amazing little CHIRP sounder.
> 
> 3) still debating on what to aim forward. Currently have an Interphase forward scanning sonar, but not real impressed with it. Older technology that works. Sort of.
> 
> Brian
> 
> 
> Get Outlook for Android
> 
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