Method and apparatus for an acoustic-electric channel mounting

• US 8,681,587 B2
• Filed: 07/26/2012
• Issued: 03/25/2014
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Rensselaer Polytechnic Institute
• Original Assignee: Rensselaer Polytechnic Institute
• Inventors: Wilt, Kyle R., Scarton, Henry A., Saulnier, Gary J., Ashdown, Jonathan D., Lawry, Tristan
• Primary Examiner(s): Alsomiri, Isam
• Assistant Examiner(s): HULKA, JAMES R
• Application Number:
  US13/559,164
• Publication Number:
  US 20130258815A1
• Time in Patent Office: 607 Days
• Field of Search: 367/173, 367/188
• US Class Current: 367/173
• CPC Class Codes: G01S 15/06 Systems determining the position data of a target
• CPC Class Codes: G01S 7/521 Constructional features
• CPC Class Codes: G10K 11/006 Transducer mounting in underwater equipment, e.g. sonobuoys

Abstract

Method and apparatus for rotational alignment and attachment of ultrasonic transducers to a barrier with one submerged surface uses a temporary transducer assembly to position mounting rings on opposite surfaces of the barrier. Plural permanent transducers are then mounted to each mounting ring and are aligned with each other across the barrier by virtue of the alignment of their mounting rings. The submerged mounting ring is used like a cylinder in combination with a mounting plate for the transducers on the submerged side of the barrier or each submerged side transducer has a suction cup fitting for use to exclude water from between each transducer and the submerged barrier surface to facilitate bonding of the submerged side transducers to the barrier.

Claims

1. An assembly for mounting a transducer directly to a submerged exterior surface of a submerged wall without perforating the wall, the assembly comprising:

a transducer comprising a transmitting face for emitting acoustical transmissions, the transducer also comprising a back side generally opposite the transmitting face;

the back side of the transducer mounted to a backing, the backing having a resilient flange at its periphery;

the backing and the flange being positioned at the exterior surface of the submerged wall so that the backing, the flange, and the exterior surface of the submerged wall collectively form a cavity with the transducer held in the cavity, with at least the flange contacting the exterior surface, and with the transmitting face of the transducer facing the exterior surface and the back side of the transducer facing generally away from the exterior surface and towards the backing;

the assembly being adapted so that when the backing is pressed towards the surface, the resilient flange contacts the surface and creates a temporary seal, surrounding the transducer, with the exterior surface;

the assembly being adapted so that when the backing is pressed towards the surface, the transmitting face of the transducer also contacts the exterior surface, and the resilient flange is capable of flexing to accommodate movement by the backing and transducer;

the transducer and the backing together comprising a continuous hole which does not pass through the submerged wall, the continuous hole being adapted to pass liquids and gasses to the space in the cavity between the transmitting face of the transducer and the exterior surface of the submerged wall.

2. The assembly as claimed in claim 1, the assembly further comprising a backing plate removably engaged with the backing;

the backing plate being adapted to press one or more backings towards the exterior surface of the submerged wall.

3. The assembly as claimed in claim 1, the assembly further comprising a round mounting ring, in the form on a section of a hollow cylinder, fixed to the exterior surface of the submerged wall;

the backing, the flange, and the transducer being positioned on a portion of the exterior surface of the submerged wall within the circumference of the mounting ring;

the assembly further comprising a backing plate removably connected to the mounting ring;

the backing plate being adapted to selectably press one or more backings towards the exterior surface of the submerged wall.

4. The assembly as claimed in claim 1, the assembly further comprising a tube passing through the continuous hole through the backing and the transducer which does not pass through the submerged wall, wherein the tube is adapted for passing liquids and gasses to the interface between the transmitting face of the transducer and the exterior surface.

5. The assembly as claimed in claim 1, wherein the backing and the flange comprise an elastic material.

6. The assembly as claimed in claim 1, wherein the backing and the flange collectively form a suction cup shape and the transducer is mounted to the backing inside of the suction cup and is surrounded by the flange.

7. The assembly of claim 1, wherein the submerged wall is a hull of a water craft which is in water, and wherein the assembly is positioned against a submerged exterior surface of the hull which is under water.

8. The assembly of claim 7, wherein the assembly is positioned against a portion of the submerged exterior surface of the hull which does not have any openings there through.

9. The assembly of claim 1, wherein the assembly is positioned against an exterior surface of a submerged wall, and wherein at least an area of the submerged wall where the arrangement is positioned does not have any openings there through.

10. A method for attaching a transducer directly to an exterior surface of a submerged wall without perforating the wall, the method comprising the following steps:

providing a transducer comprising a transmitting face for emitting acoustical transmissions, the transducer also comprising a back side;

attaching the back side of the transducer to a backing, the backing comprising a flange;

placing the backing near the exterior surface of the submerged wall so that at least the flange contacts the exterior surface, wherein the backing, the flange, and the exterior surface collectively form a cavity, wherein the transducer is positioned in that cavity with the transmitting face facing the exterior surface and the back side facing generally away from the submerged wall and towards the backing, and wherein the backing and the transducer together comprise a hole communicating between the outside of the backing and the cavity, said hole not passing through the submerged wall;

forcing a gas through the hole to pressurize the area within the cavity to force any water out of the cavity;

injecting adhesive through the hole into the cavity until the cavity is substantially filled with the adhesive;

applying force to the backing in the direction of the submerged wall until the transducer comes into contact with the exterior surface, simultaneously shrinking the cavity and forcing any excess adhesive out of the cavity;

maintaining pressure on the backing to hold the transducer against the surface until the adhesive has bonded the transmitting face of the transducer to the exterior surface of the submerged wall.

11. The method of claim 10, further comprising the step of removing the backing from the transducer after the adhesive has bonded the transducer to the exterior surface of the submerged wall.

12. The method of claim 10 wherein the backing, the flange, and the transducer are positioned on a portion of the exterior surface that is within the circumference of a round mounting ring fixed to the exterior surface, wherein the mounting ring is in the form of a section of a hollow cylinder, and wherein the mounting ring comprises a plurality of threaded holes spaced about its circumference;

and

wherein the steps of applying and maintaining pressure on the backing in the direction of the surface are accomplished by fixing a backing plate to the mounting ring by engaging one or more threaded couplings with one or more threaded holes on the mounting ring, wherein the backing plate is superior to the backing with relation to the exterior surface of the submerged wall, by twisting the one or more threaded couplings into their respective threaded holes in the mounting ring until the transducer is moved into contact with the exterior surface, such twisting being adapted to move the backing plate towards the exterior surface, the backing plate thereby pushing the backing and the transmitting face of the transducer towards the exterior surface; and

by leaving the backing plate in place until the adhesive fixing the transducer to the exterior surface hardens.

13. The method of claim 10, wherein the submerged wall is a hull of a water craft which is in water, wherein the assembly is positioned against a submerged exterior surface of the hull which is under water, and wherein the transducer is bonded to a portion of the hull which does not have any openings through the hull.

14. The method of claim 10, wherein the gas and the adhesive are delivered to the cavity through a tube which passes through the continuous hole through the backing and the transducer, wherein the tube does not pass through the submerged wall.

15. An assembly for mounting a transducer directly to a submerged exterior surface of a submerged wall without perforating the wall, the assembly comprising:

a transducer comprising a transmitting face for emitting acoustical transmissions, the transducer also comprising a back side generally opposite the transmitting face;

the back side of the transducer mounted to a backing, the backing having a resilient flange at its periphery;

the backing and the flange being positioned at the exterior surface of the submerged wall so that the backing, the flange, and the exterior surface of the submerged wall collectively form a cavity with the transducer held in the cavity, with the flange contacting the exterior surface, and with the transmitting face of the transducer held against the exterior surface and radially surrounded by the flange;

the backing is pressed towards the exterior surface, and the resilient flange is against the exterior surface forming a resilient seal, surrounding the transducer, with the exterior surface;

the transducer and the backing together comprising a continuous hole which does not pass through the submerged wall, the continuous hole being adapted to pass adhesives and gasses to the space in the cavity between the transmitting face of the transducer and the exterior surface of the submerged wall;

wherein adhesive is present in the cavity including between the transmitting face of the transducer and the exterior surface of the submerged wall, and wherein the cavity between the transducer and the exterior surface is substantially free of water and gasses.