Device for a vertical electromagnetic field component receiver
A device for disposing an antenna dipole arranged to be submerged in a water mass is described. A first electrode is placed, in an operative position, approximately vertically above and at a distance from a second electrode. A mast is pivotally secured, at a portion distant from, in the operative position, a lower end portion, to a stand. The first electrode is arranged near, in or on an upper end portion of the mast. The second electrode is arranged near, in or on the lower end portion of the mast. The mast and/or stand includes means which are arranged to keep the mast in a prescribed position. The mast and stand are formed substantially of non-magnetic materials.
1. A device for disposing an antenna dipole ( 1 ) arranged to be submerged in a water mass, a first electrode ( 11 ) being placed, in an operative position, approximately vertically above and at a distance from a second electrode ( 12 ), said device comprising:
a mast ( 2 ) is pivotally secured to a stand ( 3 ), in a portion distant from, in the operative position, a lower end portion ( 22 ) of the mast ( 2 );
the first electrode ( 11 ) is arranged near, in or on an upper end portion ( 21 ) of the mast ( 2 );
the second electrode ( 12 ) is arranged near, in or on the lower end portion ( 22 ) of the mast ( 2 );
at least one of the mast ( 2 ) and stand ( 3 ) includes positioning means which are arranged for keeping the mast ( 2 ) in a prescribed position; and
the mast ( 2 ) and stand ( 3 ) are formed substantially of non-magnetic materials.
2. The device in accordance with claim 1 , wherein the stand ( 3 ) is provided with a pivot joint ( 331 ) arranged for connection to a portion of the mast ( 2 ).
3. The device in accordance with claim 1 , wherein the stand ( 3 ) is provided with at least three legs ( 31 ) which are supported at a lower portion ( 311 ) by a foundation ( 32 ), and an upper node ( 33 ) forms a connection between portions of the legs ( 31 ) distant from the foundation ( 32 ).
4. The device in accordance with claim 3 , characterized in that the pivot joint ( 331 ) is arranged near the upper node ( 33 ).
5. The device in accordance with claim 2 , wherein the pivot joint ( 331 ) is arranged on an arm ( 35 ) projecting freely up from the foundation ( 32 ).
6. The device in accordance with claim 5 , wherein a mid portion ( 23 ) of the mast ( 2 ) is secured to the pivot joint ( 331 ).
7. The device in accordance with claim 4 , wherein the upper end portion ( 21 ) of the mast ( 2 ) is secured to the pivot joint ( 331 ).
8. The device in accordance with claim 1 , wherein the stand ( 3 ) is provided with a foundation ( 32 ) which includes a biaxial actuator system arranged to fix the lower end portion ( 22 ) of the mast ( 2 ) horizontally.
9. The device in accordance with claim 1 , wherein the lower end portion ( 22 ) the mast ( 2 ) is provided with one or more ballast elements ( 221 ).
10. The device in accordance with claim 3 , wherein each of the legs ( 31 ) of the stand ( 3 ) is telescopic.
11. The device in accordance with claim 10 , wherein each of the telescopic legs ( 31 ) of the stand ( 3 ) is provided with one or more adjustment means for remote-controlled adjustment of the length of the leg ( 3 ).
12. The device in accordance with claim 10 wherein a slide-out leg element ( 312 ) in each of the legs ( 31 ) is provided with at least one buoyancy body ( 312 a ).
13. The device in accordance with claim 12 , wherein the at least one buoyancy body ( 312 a ) is constituted by an internal cavity in the slide-out leg element ( 312 ).
14. The device in accordance with claim 13 , wherein the internal cavity in the slide-out leg element ( 312 ) is in closable fluid communication with a gas accumulator.
15. The device in accordance with claim 10 , wherein one or more of the legs ( 31 ) is provided with an actuator which is arranged to adjust the length of the respective leg ( 31 ) individually.
16. The device in accordance with claim 1 , wherein the foundation ( 32 ) is provided with ballast means ( 321 ) arranged for stabilization of the stand ( 3 ) on a surface.
17. The device in accordance with claim 1 , wherein the foundation ( 32 ) is arranged to accommodate a signal receiver unit ( 4 ).
18. The device in accordance with claim 1 , wherein the mast ( 2 ) is telescopic.
19. The device in accordance with claim 1 , wherein each of the first and second electrode ( 11 , 12 ) is provided with verification means for verifying the position of the electrode ( 11 , 12 ) in at least one of a horizontal plane and vertical plane.
20. The device in accordance with claim 1 , wherein the device is provided with measuring instruments taken from the group consisting of geophysical and oceanographic measuring instruments.