Vibration reduction type self-contained hydrophone system

Abstract

The invention provides a vibration damping type self-contained hydrophone system. The vibration damping type self-contained hydrophone system comprises a hydrophone system, a rubber vibration damping funnel, a rubber vibration damper, a flow guide cover and a mounting bracket, according to the utility model, the vibration damping structure design of combining the rubber vibration damping funnel and the triaxial rubber vibration damper is adopted, the problem that the detection precision is influenced by the vibration of the mounting platform is well solved, and meanwhile, the resonant frequency of the mounting bracket is reduced and the lower limit of the detectable signal frequency band of the hydrophone is broadened due to the structural design and use of the metal / polymer damping composite material.

Description

Technical Field

[0001] The invention relates to the field of hydrophones, in particular to a self-contained hydrophone, in particular to a self-contained hydrophone with a vibration reduction system. Background Art

[0002] At present, hydrophones are widely used in the field of hydroacoustic engineering, mainly for picking up underwater environmental noise signals and target information. Hydrophones are usually installed on buoys or carried on platforms such as underwater vehicles. In actual use, when a self-contained buoy is used on the bottom, it will receive vibration signals from the seabed, or because the installation platform will generate large vibrations and noise during operation, the vibration of the seabed is transmitted to the self-contained hydrophone mounting rack, and the vibration of the rack will be transmitted to the hydrophone, resulting in the introduction of interference signals, which is very unfavorable for the signal reception of the hydrophone, reducing the detection accuracy and working efficiency of the hydrophone.

[0003] At present, there is no special vibration reduction device for hydrophones and underwater vehicles. Most of the existing vibration absorbers are used to support large equipment such as machine tools to meet the needs of vibration and noise reduction of the equipment itself, and most of these vibration absorbers are mainly used to bear axial loads, which are not suitable for hydrophones. In addition, the vibration absorbers on existing mechanical equipment cannot be used in underwater environments, and due to the limitations of their own structures, they cannot be used on hydrophones.

[0004] The vibration reduction problem is an urgent problem to be solved in the use of hydrophones, especially vector hydrophones. The rubber funnel suspension method is combined with a rubber-metal composite vibration isolator with consistent triaxial bearing capacity to reduce the interference of the receiving signal of the self-contained hydrophone caused by the vibration of the mounting bracket, thereby improving the accuracy of the hydrophone test. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a self-contained hydrophone with a vibration reduction device.

[0006] The invention provides a vibration-damping self-contained hydrophone system, which comprises a self-contained hydrophone system, a rubber vibration-damping funnel, a rubber vibration damper, a flow deflector, and a mounting bracket.

[0007] The self-contained hydrophone system comprises a hydrophone system and a collection system.

[0008] The hydrophone system comprises a hydrophone, a suspension bracket, a rubber rope, a packaging shell, filling oil and a front amplifier board. The hydrophone is suspended on the suspension bracket through the rubber rope, and is packaged with a sound-transparent shell and then filled with oil.

[0009] The rubber vibration-damping funnels are two porous rubber funnels, one end of which is connected to the hydrophone system and the other end is connected to the mounting bracket.

[0010] The rubber vibration damper is a rubber vibration damper with consistent load bearing in three axes, and is used to isolate the vibration brought to the hydrophone system by the mounting bracket, and at the same time supports the hydrophone system.

[0011] The deflector cover is a sound-permeable resin cover with multiple holes.

[0012] The mounting bracket is a metal / polymer damping material composite bracket used to support the self-contained hydrophone. Each part of the assembly bracket is made of a metal outer layer wrapped with a polymer damping material, and the joint joints of the bracket are connected with a polymer damping material.

[0013] In the above technical solution, preferably, the hydrophone is a scalar hydrophone or a vector hydrophone.

[0014] In the above technical solution, preferably, the rubber rope is an elastic silicone rubber ring or an elastic nitrile rubber ring.

[0015] In the above technical solution, preferably, the oil is an oil whose sonic velocity is close to that of water, such as methyl silicone oil, light naphthalene oil, etc.

[0016] In the above technical solution, preferably, the hydrophone packaging shell material is polyether polyurethane or seawater corrosion-resistant rubber.

[0017] In the above technical solution, preferably, the rubber funnel is a rubber funnel with evenly distributed holes, and the rubber material is a rubber resistant to seawater corrosion, including chloroprene rubber, nitrile rubber, etc.

[0018] In the above technical solution, preferably, the rubber shock absorber is a rubber-metal composite shock absorber with consistent three-axial load-bearing capacity and a metal limiter.

[0019] In the above technical solution, preferably, the sound-permeable resin is epoxy resin, polycarbonate or the like.

[0020] In the above technical solution, preferably, the mounting bracket is made of a composite of metal and rubber damping material. The metal can be stainless steel, titanium alloy, aluminum alloy, etc.; the rubber can be polyether polyurethane rubber, chloroprene rubber, nitrile rubber, etc.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention provides a vibration-damping self-contained hydrophone system, which can solve the problem of reducing the detection accuracy and working efficiency of the hydrophone due to the vibration of the mounting bracket or the mounting platform.

[0023] 2. The use of porous rubber funnel is equivalent to secondary vibration reduction of the hydrophone. At the same time, the rubber vibration isolator can ensure the consistency of the three-axial force of the vector hydrophone and isolate vibrations above 10 Hz. In addition, the metal / polymer damping material composite structure of the mounting frame reduces the resonance frequency of the frame and broadens the lower limit of the hydrophone test frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 Schematic diagram of the self-contained hydrophone structure.

[0026] Figure 3 Schematic diagram of the hydrophone structure. DETAILED DESCRIPTION

[0027] According to the technical solution of the present invention, without changing the essential spirit of the present invention, those skilled in the art can change or replace a variety of structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0028] like Figure 1 As shown, the present invention mentions a vibration-damping self-contained hydrophone system, which includes a hydrophone system 1, a rubber vibration-damping funnel 2, a rubber vibration damper 3, a guide cover 4, and a mounting bracket 5.

[0029] like Figure 2 As shown, the hydrophone system 1 is composed of a hydrophone receiving subsystem 11 and a collection subsystem 12, and the two parts are connected by a watertight connector, wherein the collection part includes a collection circuit part and a power supply.

[0030] like Figure 3 As shown, the hydrophone receiving subsystem 11 is composed of a hydrophone 111, a hanging bracket 112, a rubber rope 113, filling oil 114, a packaging shell 115 and a preamplifier 116. The hydrophone is hung on the hanging bracket by a rubber rope, and is filled with oil after being packaged in a sound-transparent packaging shell. The design of the oil-filled structure can balance the internal and external pressures of the packaging shell during underwater testing, thereby improving the pressure resistance of the hydrophone system. The preamplifier is packaged in the sound-transparent shell together, so that it is closer to the hydrophone and reduces transmission loss.

[0031] The rubber vibration-damping funnel has two hydrophone systems suspended from the upper and lower ends, wherein the upper end of the upper vibration-damping funnel and the upper end of the lower vibration-damping funnel are fixedly connected to the mounting bracket by bonding, and the lower end of the upper vibration-damping funnel and the upper end of the lower vibration-damping funnel are fixedly connected to the hydrophone system by bonding or metal clamps. The rubber vibration-damping funnel has evenly distributed holes, which can reduce the natural frequency of the funnel.

[0032] The upper end of the rubber vibration damper is rigidly fixed to the hydrophone system through threads, and the lower end is rigidly fixed to the mounting plane on the mounting bracket through threads. The number and size of the rubber vibration damper can be determined according to the weight of the hydrophone system.

[0033] The deflector is mainly used to reduce the flow noise impact on the hydrophone system. The deflector is in an arc shape, which is conducive to the water flow diversion. A circular hole is left above the deflector, and the diameter of the hole is equal to the upper diameter of the rubber funnel. The deflector is rigidly fixed to the frame by threads.

[0034] The mounting bracket is mainly used to install and support the hydrophone system, the rubber vibration damper and the deflector.

[0035] Will Figure 1 The vibration-damping self-contained hydrophone system shown in the figure was tested in a certain sea area. By comparing the test results with the previous self-contained hydrophone without a vibration-damping system, the following conclusions can be drawn:

[0036] 1. From the test results of the self-contained hydrophone with a vibration reduction device, it can be clearly seen that the interference signal becomes smaller, which greatly improves the test signal-to-noise ratio, makes it easier to analyze the collected signals, and improves the detection accuracy of the signals.

[0037] 2. The design of using rubber vibration-damping funnel and rubber vibration damper to reduce the vibration of hydrophone system is reasonable, which can reduce the lower limit of the frequency band of the hydrophone collection signal. In addition, the use of metal / polymer damping composite material reduces the resonant frequency of the mounting bracket.

[0038] 3. Compared with the use of single or multiple rubber rope suspension, the vibration reduction structure design combining the rubber vibration reduction funnel and the triaxial rubber vibration reduction device is easier to ensure the horizontality of the system, and can well achieve the vibration reduction of the vector hydrophone without affecting the directionality of the test.

[0039] 4. The vibration reduction system described in the present invention can be installed on a rack to facilitate the testing of submerged buoys, or it can be used alone in combination with a hydrophone system and directly installed on a test platform.

[0040] The technical scope of the present application is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present application, and these deformations and modifications should all fall within the protection scope of the present application.

Claims

1. A vibration-damping self-contained hydrophone system, comprising a hydrophone system (1) which can be a common hydrophone system or a self-contained hydrophone system. The hydrophone can be a scalar hydrophone or a vector hydrophone. The rubber vibration-damping funnel (2) can be a rubber funnel with holes. The rubber vibration damper (3) is selected from a suitable rubber vibration damper with consistent three-axial load according to the natural frequency of the test system after simulation calculation. The vibration damper is formed by composite vulcanization of rubber and metal. The flow guide cover (4) is made of sound-permeable resin or composite resin and is used to cover the hydrophone system to reduce flow noise. The mounting bracket (5) is made of metal and polymer damping material.

2. The vibration-damping self-contained hydrophone system according to claim 1, Features The hydrophone of the hydrophone system is suspended in an oil-filled sound-permeable shell.

3. The vibration-damping self-contained hydrophone system according to claim 1, Features The rubber vibration-damping funnel has cylindrical edges at the top and bottom for installation.

4. The vibration-damping self-contained hydrophone system according to claim 1, Features The three-axial load of the rubber shock absorber is consistent.

5. The vibration-damping self-contained hydrophone system according to claim 1, Features The mounting bracket is made of a composite of metal and polymer damping material, which can be realized by cold bonding or processes such as vulcanization, and the joints of the rack are made of polymer damping material.

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