Sonar device with holder
The present disclosure relates to a Sonar device ( 1 ) for detection of underwater objects. The sonar device ( 1 ) comprises a body element ( 2 ) comprising a piezo electric element ( 3 ). The sonar device further comprises a holder ( 4 ) adapted to hold the piezo electric element ( 3 ). The holder ( 4 ) is arranged to centre the piezo electric element ( 3 ) within said body element ( 2 ). The holder ( 4 ) is arranged such that the piezo electric element ( 3 ) is held firmly in place and also provide for that detection can be made omni-directionally. A method for manufacturing a holder ( 4 ) and a sonar device ( 1 ) is also disclosed.
1. Sonar device ( 1 ) for detection of underwater objects, said sonar device ( 1 ) comprising:
a body element ( 2 ) comprising a piezo electric element ( 3 ), and
a holder ( 4 ) for holding the piezo electric element ( 3 ),
wherein:
said holder ( 4 ) has a planar portion and three to twelve arms ( 40 , 41 , 42 ) extending at a right angle relative to said planar portion, each of said three to twelve arms ( 40 , 41 , 42 ) having a U-shaped profile defining two separate engagement points ( 410 a , 410 b ) and a space therebetween,
said holder ( 4 ) is arranged to center the piezo electric element ( 3 ) within said body element ( 2 ),
said holder ( 4 ) is arranged such that the piezo electric element ( 3 ) is held firmly in place by said three to twelve arms ( 40 , 41 , 42 ),
said holder ( 4 ) is arranged to provide for omni-directional detection, and
said holder ( 4 ) engages the piezo electric element ( 3 ) at three to twelve separate engaging areas ( 400 , 410 , 420 ) defined by said three to twelve arms ( 40 , 41 , 42 ) and further separated by a non-engaging area between each adjacently positioned of the three to twelve separate engaging areas ( 400 , 410 , 420 ).
2. Sonar device ( 1 ) according to claim 1 , wherein the piezo electric element ( 3 ) has a half spherical shape or a full spherical shape.
3. Sonar device ( 1 ) according to claim 1 , wherein:
the body element ( 2 ) is filled with a resin ( 6 ) such that the sonar device ( 1 ) is water-proof, and
the body element ( 2 ) further holds the piezo electric element ( 3 ) in position.
4. Sonar device ( 1 ) according to claim 1 , wherein the holder ( 4 ) has a half spherical bowl shape.
5. Sonar device ( 1 ) according to claim 1 , wherein the separate engaging areas ( 400 , 410 , 420 ) are symmetrically distributed around a circumference of the piezo electric element ( 3 ).
6. Sonar device ( 1 ) according to claim 1 , wherein the holder ( 4 ) has a cavity positioned intermediate said three to twelve arms ( 40 , 41 , 42 ) and where the electronics ( 7 ) needed for the sonar device ( 1 ) is directly comprised within the structure of the holder ( 4 ).
7. Sonar device ( 1 ) according to claim 1 wherein at least the holder ( 4 ) is a layer on layer element as provided by manufacturing by a reciprocating three dimensional printing device ( 8 ).
8. Sonar device ( 1 ) according to claim 1 , wherein the three to twelve separate engaging areas ( 400 , 410 , 420 ) consist of three separate engaging areas.
9. Sonar device ( 1 ) according to claim 1 , wherein the three to twelve separate engaging areas ( 400 , 410 , 420 ) each have two engagement points ( 410 a , 410 b ) separated by a recess ( 10 ), each of the two engagement points separately engaging the piezo electric element ( 3 ).
10. Sonar device ( 1 ) according to claim 1 , wherein the holder ( 4 ) has a recess ( 11 ) in a bottom surface thereof.