9/5/22 Simple Integration of the Hydrophone to the Front Vectored Thrusters

Colin Szeto

The thought process for this design is to integrate the hydrophone mounting onto the vectored front motor thrusters. This simplifies the design of the system as the propulsion superstructure can be utilized for the hydrophone mount. Greatest problem now is the proximity to the surface of the water

Rev 1, getting ideas down for a visual representation of the hydrophone mounting on the front vectored thruster’s vertical bar

Rev 2, top view, deciding where to place the hydrophone

Rev 3, determining the hydrophone should be under the interface plate to enable the greatest chance of the hydrophone receiving the pings

Top view of the vectored motor mounts

The blue dots represent the potential hydrophone placement location. 

The purple vectors represent the direction the water will flow. 

The hydrophone will be placed to the side of the motor mounts to avoid the currents that the motors will generate

The design is a single printed part with zip ties holding the hydrophone to the printed part

Parts count: 

1 AS-1 hydrophone

3 zip ties

2 ¼-20 1in long button head stainless steel screws

2 stainless steel t nuts

3d printed holder attached to the base plate

Biggest concern with this design is the hydrophone will most likely hit the trailer

Hydrophone mount on the inner section of the interface plate

Alternate view of the hydrophone mount on the interface plate

9/4/2022 Design for the Hydrophone Arm

Lindsay Wright

ERAU boom arm is swing-style; we want a quick prototype that will interface with the WAM-V

Distance between the back of the spring and the handles was measured to be 53.799" in the back-and-forth (k-hat) direction, which is our estimate of the length of Embrey Riddle's hydrophone boom arm:

Pontoon height is roughly 14.416", but to be on the conservative side we will consider it as 15" (it wasn't measuring from top to very bottom as I hoped it would):

We add another 40"/1m to ensure the hydrophone is well under the surface

 

If we create a prototype mount similar to our T500 mount, then the minimum length of the boom arm is 58" (15+40+3 inches to account for the height taken by the mount)

 

This concurs with Embrey-Riddle's boom arm length

 

Therefore here is a prototype of a hydrophone boom based on Colin's T500 mount design.

Notes on parts:

rod is drilled .25" diameter with the intent of filling with threaded rods

 

Mounting plate for hydrophone:

8/27/2022 Ideating Hydrophone Boom Arm

Colin Szeto

Mounting a fold down mechanism onto the existing motor holder

file location of the cad model 

Could use a rod to roll within the 80/20 profile to rotate the motor mounts

80/20 pivot solution here