Central exhaust curved disc transducer dense array and method for depth air pressure compensation

Abstract

The application discloses a center exhaust bending disc transducer dense array and method for depth-keeping air pressure compensation, which comprises a plurality of up-and-down arranged bending disc transducer array elements, each of which comprises an outer frame, a radiation panel, a water-tight adhesive layer, a piezoelectric ceramic, a center joint and a bottom end joint, a plurality of same bending disc transducer array elements are connected through Kevlar ropes at multiple points, and air paths between adjacent bending disc transducer array elements are connected in series through the center joint and an air pipe, the bottom of the bending disc transducer array element is provided with a protection box connected out through the bottom end joint, so as to prevent seawater from flowing back. The application can collect water through the shape of the array element radiation panel, reduce the use of the length of the air pipe through the center drainage mode, reduce the air flow resistance, accelerate the efficiency of the transducer drainage and inflation link, improve the safety, has small changes on the transducer structure and performance, is relatively controllable, and has low cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transducers, and particularly relates to a center air exhaust curved disc transducer dense array for depth-keeping air pressure compensation and a method. BACKGROUND

[0002] A conventional curved disc transducer dense array needs to be laid flat, and the inner cavity space thereof is in the shape of an approximate oblate cylinder. For the air pressure compensation curved disc transducer, water in the inner cavity needs to be exhausted and high-pressure gas needs to be filled when the transducer is used. If the transducer has an inclination angle, part of the water will be stored on the radiation panel of the transducer, and the working efficiency of the transducer in this case is greatly reduced.

[0003] In recent years, in order to solve the problem of small working depth of the curved disc transducer, the air pressure compensation mode in the inner cavity of the transducer has gradually matured. The principle is to make the inner pressure of the transducer equal to the external water pressure, so as to continue to dive the working depth of the transducer. However, during the gradual deployment of the transducer from shallow water to deep water, the real-time air pressure compensation efficiency of the transducer is too low, and the safety is poor. Therefore, the depth-keeping air pressure compensation technology of the transducer is more used, that is, a through hole is reserved in the inner cavity of the transducer, so that seawater can freely enter and exit the inner cavity of the transducer, and mechanical damage of the transducer caused by imbalance between the inner and outer pressures is avoided. However, when this technology is applied, the principle is to drain water and fill gas by using the density difference between water and high-pressure gas. Therefore, the flow path of water needs to be designed to complete the task. For the curved disc transducer dense array, due to the structural characteristics of the conventional transducer, the inner cavity is an oblate cylinder, and the water in the inner cavity cannot be completely exhausted, which reduces the working efficiency of the transducer.

[0004] For this problem, since the depth-keeping air pressure compensation scheme is still in the blank stage in the field, there is no related scheme to be found. As for the feature that the sound radiation panel of the transducer is curved, some papers study the performance of the transducer itself, rather than the purpose of collecting water. There is no corresponding use background, and there is no corresponding air path design content. It is only a single similar feature.

[0005] The existing deep water high air pressure compensation technology often ignores the problem of complete water drainage when applying a voltage signal to the transducer, which reduces the efficiency of the transducer. SUMMARY

[0006] In order to solve the problem that the water cannot be completely drained in the air pressure compensation process of the curved disc transducer in the existing deep water high air pressure compensation technology, the application provides a center air exhaust curved disc transducer dense array for depth-keeping air pressure compensation. The transducer can be more fully drained and filled with air, the problem of water drainage in the inner cavity of the transducer is solved, the structure of the transducer is changed little, the cost is low, the air path length is small, the water drainage and air filling efficiency is improved, and the reliability is high.

[0007] The technical scheme of the present application is as follows: a center exhaust curved disc transducer dense array for depth pressure compensation, comprising a plurality of up-down arranged curved disc transducer array elements, each curved disc transducer array element comprising an outer frame, a radiation panel, a water-tight adhesive layer, a piezoelectric ceramic, a center joint and a bottom joint, a plurality of same curved disc transducer array elements being connected by Kevlar ropes at multiple points, the air path between adjacent curved disc transducer array elements being connected in series through the center joint and an air pipe, the top of the curved disc transducer dense array having a top hanger for lifting the curved disc transducer dense array, and the bottom of the curved disc transducer array element having a protection box connected by the bottom joint to prevent seawater from flowing back.

[0008] Preferably, the top hanger is soft-connected to the topmost curved disc transducer array element by four equal-length Kevlar ropes, and adjacent curved disc transducer array elements are soft-connected by four equal-length Kevlar ropes, forming a transducer equidistant dense array completed by gravity, with the inlet of the dense array being fixed on the top hanger.

[0009] Preferably, the inner cavity surface of the radiation panel is in a center outwardly convex shape, and the outer side of the radiation panel is in a horizontal shape or an outwardly convex shape; the outer frame and the radiation panel are combined by interference fit or by integral processing.

[0010] Preferably, the center joint is located at the upper center of the curved disc transducer array element, and the bottom joint is located at the lower center of the curved disc transducer array element, so that the curved disc transducer array element is inflated and drained by the density difference between gas and liquid from the center position.

[0011] Preferably, the bottom of the curved disc transducer dense array is provided with a protection box, and the length of the air cable between the protection box and the bottom curved disc transducer array element is greater than or equal to 500 mm.

[0012] Preferably, the inner cavity cable interfaces of the curved disc transducer array elements are water-tight, and the cables are led out from the side edges of the outer frame, and the outer frame is provided with depth and air pressure sensors for monitoring the internal air pressure and external water pressure.

[0013] Preferably, the outer frame is divided into upper and lower parts, and the upper and lower parts of the outer frame are combined by first bonding and then edge laser welding.

[0014] Preferably, adjacent curved disc transducer array elements are connected by hoisting points provided at the positions of the outer frames using equal-length Kevlar ropes, and the hoisting points are not less than three.

[0015] A working method of a center exhaust curved disc transducer dense array for depth pressure compensation,

[0016] The curved disc transducer dense array is placed in water, the inlet is disconnected with the high-pressure air compressor air cable and is communicated with the external seawater, the bottom protection box is also communicated with the seawater, the whole transducer inner cavity and the air pipe are filled with seawater;

[0017] When the curved disc transducer dense array is placed at a depth position and starts to be used, the inlet is disconnected with the external seawater and is connected with the high-pressure air compressor air cable, when the inlet is inflated, the protection box discharges water and air;

[0018] When the curved disc transducer dense array is recovered, the inlet is disconnected with the high-pressure air compressor air cable and is communicated with the external seawater, gas escapes from the inlet end through the density difference, and seawater mainly backtracks into the inner cavity from the protection box, and then the inner cavity is filled with seawater and is safely recovered.

[0019] The curved disc transducer dense array has the following beneficial effects: water can be collected through the shape of the array element radiation panel, the length of the air pipe is reduced through the central drainage mode, the gas flow resistance is reduced, the transducer drainage and inflation efficiency is accelerated, the transducer can be more fully drained and inflated, the transducer inner cavity drainage problem is solved, the safety is improved, the transducer structure is slightly changed, the performance is slightly changed, it is relatively controllable, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 The curved disc transducer dense array element sectional view of an embodiment scheme of the present application;

[0021] Fig. 2 The curved disc transducer dense array element water removal waterproof glue layer front view of an embodiment scheme of the present application;

[0022] Fig. 3 The curved disc transducer dense array schematic view of an embodiment scheme of the present application. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below through specific examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not intended to limit the scope of the present application.

[0024] Example 1

[0025] As Figs. 1-3As shown, a center exhaust curved disc transducer dense array for depth pressure compensation has four curved disc transducer array elements combined in upper and lower, wherein the curved disc transducer array element is an upper and lower symmetric structure, specifically comprising an outer frame 1, a water-tight adhesive layer 2, a radiation panel 3, a piezoelectric ceramic 4, and a joint 5; in addition, the top of the dense array has a top hanger 6 as a transducer lifting connection, the top hanger can be fixed into an inlet 7, the bottom has a bottom end joint connected protective box 10, the transducer has a high-pressure air pipe 8 as a gas connection link, and the Kevlar rope 8 and 9 are connected to maintain the array type. The cable interface of the curved disc transducer cavity is water-tight, and the cable is led out from the side of the outer frame, and the outer frame installation depth and air pressure sensor can monitor the internal air pressure and external water pressure, which will not be described in this patent and is not shown in the figure.

[0026] When the curved disc transducer array element needs to be inflated and drained, the top joint 5 is air-in, and the bottom joint is water-out and air-out, which can automatically complete liquid collection and drainage by the difference in gas-liquid density, and the transducer gas circuit in series can make the transducer complete the above-mentioned inflation and drainage process in turn.

[0027] The transducer top hanger 6 is connected to the top array element of the transducer dense array by four equal-length Kevlar ropes 9, and the transducers are connected by four equal-length Kevlar ropes 8, forming a transducer equidistant dense array completed by gravity.

[0028] Example 2

[0029] After the transducer is placed in water, the inlet 7 is disconnected from the high-pressure air compressor cable and is connected to the external seawater, and the bottom protective box 10 is also connected to the seawater, so that the entire transducer cavity and air pipe are filled with seawater, which can protect the transducer from mechanical damage.

[0030] When the transducer is placed at the depth position and starts to be used, the inlet 7 is disconnected from the external seawater and connected to the high-pressure air compressor cable, and when the inlet 7 is inflated, the protective box 10 is water-out and air-out. At this time, the dense array carries out transducer cavity inflation and drainage. After the drainage is completed, the transducer can be considered to have working conditions.

[0031] When the dense array task is completed and recovered, the inlet 7 is disconnected from the high-pressure air compressor cable and connected to the external seawater, and the gas-liquid passes through the density difference, the gas escapes from the end of the inlet 7, and the seawater mainly backtracks to the cavity from the protective box 10, and then the cavity is filled with seawater, which can be considered to have recovery conditions.

[0032] The curved disc transducer radiation panel completes water collection in the form of outward convex, which saves cost, has small changes in transducer structure and system, does not need to add components, saves cost, has small changes in overall dense array performance, has higher control degree, and has lower cost. Compared with the traditional side cable outlet, the center cable outlet can greatly reduce the cable length, thereby reducing the flow resistance, improving the efficiency of transducer gas-liquid transportation, and improving the reliability and safety.

[0033] The present application can be used in deep water depth-keeping air pressure compensation type bending disc transducer dense array emission system, and the transducer inner cavity has the characteristics of air and liquid path sharing.

[0034] The above description of specific embodiments is intended to help understand and apply the present application, and is not intended to limit the scope of the present application. It should be noted that those skilled in the art can make various modifications to the embodiments without departing from the principles of the present application. Therefore, the present application is not limited to these embodiments in the present application, and modifications and improvements to the present application made by those skilled in the art based on the disclosure of the present application should be within the scope of protection required by the present application.

Claims

1. A dense array of centrally-exhausted curved disk transducers for constant-depth pressure compensation, characterized by: The invention comprises a plurality of curved disk transducer array elements arranged vertically, each of which comprises an outer frame, a radiation panel, a watertight adhesive layer, a piezoelectric ceramic, a central joint and a bottom joint. The plurality of identical curved disk transducer array elements are connected by multi-point bundling with Kevlar ropes, and the air paths between adjacent curved disk transducer array elements are connected in series via the central joint and the air pipe. A top hanger is provided at the top of the curved disk transducer dense array for lifting the curved disk transducer dense array, and a protective box is provided at the bottom of the curved disk transducer dense array to prevent seawater from backflowing.

2. The densely packed array of centrally exhausted curved disk transducers for constant depth pressure compensation according to claim 1, characterized in that: The top hanger is softly connected to the topmost curved disc transducer array element through four equal-length Kevlar ropes, and adjacent curved disc transducer array elements are softly connected through four equal-length Kevlar ropes, forming a closely spaced array of transducers completed by gravity, and the inlet of the closely spaced array is fixed on the top hanger.

3. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 1, characterized in that: The inner cavity surface of the radiation panel is convex outward from the center, and the outer side of the radiation panel is horizontal or convex; the outer frame and the radiation panel are combined by interference fit or integrated processing.

4. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 1, characterized in that: The center joint is located at the center of the upper side of the curved disk transducer array element, and the bottom joint is located at the center of the lower side of the curved disk transducer array element, so that the curved disk transducer array element completes the inflation and drainage function from the center position through the gas-liquid density difference.

5. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 1, characterized in that: The length of the air cable between the protection box and the curved disk transducer array element at the bottom is greater than or equal to 500 mm.

6. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 1, characterized in that: The inner cavity cable interfaces of the curved disk transducer array elements are all watertight, and the cables are led out from the side of the outer frame. At the same time, depth and air pressure sensors are installed on the outer frame to monitor the internal air pressure and external water pressure.

7. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 1, characterized in that: The outer frame is divided into two parts, an upper part and an lower part, and the upper part and the lower part of the outer frame are combined by first bonding and then laser welding the edges.

8. The densely packed array of centrally exhausted curved disk transducers for constant depth air pressure compensation according to claim 3, characterized in that: Adjacent curved disk transducer array elements are connected by hanging points set at the outer frame using Kevlar ropes of equal length, with no less than 3 hanging points.

9. A method for operating a dense array of centrally-exhausted curved disk transducers for constant-depth pressure compensation according to claim 2, characterized in that: After the curved disk transducer array is placed in water, the inlet is disconnected from the high-pressure air compressor cable and connected to the external seawater. The bottom protection box is also connected to the seawater, so that the entire transducer cavity and air pipe are filled with seawater. When the densely packed array of curved disk transducers is deployed to a fixed depth and put into use, the inlet is disconnected from the external seawater and connected to the air cable of the high-pressure air compressor. When the inlet is inflated, water and air are discharged from the protective box; When the dense array of curved disk transducers is recovered, the inlet is disconnected from the high-pressure air compressor cable and connected to the external seawater. Due to the density difference between gas and liquid, the gas escapes from the inlet end, and the seawater mainly flows back into the inner cavity from the protection box, and then the inner cavity is filled with seawater and safely recovered.

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