Sound wave test device and method for underwater equipment and gas emission method

Abstract

The invention discloses a sound wave test device and method of underwater equipment and a gas emission method. The sound wave test device comprises a water tank; the support is used for placing the tail end exhaust device, and the tail end exhaust device is used for exhausting gas; the gas release parameter adjusting system is used for realizing parameter regulation and control of gas components, gas release pressure difference and gas release flow under different regulation and control parameters according to the control instruction; the sensor system is used for at least measuring sound wave characteristic information of the exhausted gas under different regulation and control parameters; the camera system is used for generating pictures and video information of the exhausted gas; the data processing system is used for obtaining the relationship among the regulation and control parameters, the acoustic wave characteristic information and the form of the discharged gas; the fluid circulation system is used for adjusting the water depth, the flow speed and the water temperature of seawater in the water tank. The embodiment of the invention can be simultaneously suitable for simulation tests of a sound wave characteristic decoy system and a self-exhaust system, and test results are used for controlling gas emission.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of simulation test of ocean underwater acoustic waves, and particularly relates to an acoustic wave test device and method for underwater equipment and a gas discharge method. BACKGROUND

[0002] With the rise of ocean engineering, the research on ocean underwater acoustic waves is also increasingly in-depth. The research on ocean acoustic waves is related to the environmental protection of ocean development, the design and manufacture of underwater equipment, etc. The acoustic wave characteristics of bubble groups in water have an important influence on acoustic wave propagation, underwater communication and sonar technology. For example, submarines, underwater robots, ocean equipment, offshore platforms, etc. will generate bubble groups in the running process, and these bubble groups will interfere with acoustic wave propagation and affect the detection accuracy of sonar. Therefore, the research on the acoustic wave characteristics of bubble groups has important significance for optimizing the performance of underwater equipment and improving the reliability of sonar systems.

[0003] At present, the simulation test and research application of ocean underwater acoustic waves mainly adopt laboratory test, field test and simulation analysis methods. However, the existing test devices and simulation analysis usually have the following problems: single function: unable to simultaneously simulate the generation of bubble groups, acoustic wave characteristic measurement and environmental parameter adjustment; low measurement accuracy: lack of high-precision acoustic wave sensors and data acquisition systems, affecting the accuracy of test results; poor synchronization: unable to accurately measure the acoustic wave characteristics of the bubble group generation, shedding, fusion and rupture process, and insufficient support for the sound mechanism research of gas; single gas type measurement: lack of measurement of underwater discharge bubble group acoustic characteristics of different gas characteristics, and unable to carry out comparative study; insufficient gas discharge parameter regulation: unable to regulate the gas discharge flow and discharge pressure, and unable to carry out acoustic characteristic research of different discharge parameters.

[0004] The test device in the prior art cannot be simultaneously applied to the simulation test of the acoustic characteristic decoy system and the self-exhaust system. Therefore, there is an urgent need for a test device with comprehensive functions, high measurement accuracy, good synchronization, multiple gases and discharge parameters, which is used for researching the acoustic wave characteristics of bubble groups and their influence on acoustic wave propagation. It meets the development, design and manufacture of various ocean underwater equipment including ocean exploration equipment, offshore platforms, underwater robots, etc. SUMMARY

[0005] In view of the above defects or improvement needs of the prior art, the present application provides an acoustic wave test device and method for underwater equipment and a gas discharge method. A multi-parameter control and acquisition system is designed, which can diversify and accurately test different acoustic wave characteristics, and can be applied to the development, design and manufacture of various ocean underwater equipment including ocean exploration equipment, offshore platforms, underwater robots, etc.

[0006] To achieve the above objectives, this application provides an acoustic wave testing device for underwater equipment. The acoustic wave testing device includes: a water tank for filling with seawater to simulate an underwater environment; a support frame located at the bottom of the water tank for housing a terminal exhaust device for discharging gas; a gas release parameter adjustment system for adjusting gas composition, gas release pressure difference, and gas release flow rate under different control parameters according to control commands; a sensor system for measuring the acoustic wave characteristics of the discharged gas under at least different control parameters; a camera system for generating images and video information of the discharged gas; a data processing system for analyzing the control parameters corresponding to different control commands and the corresponding acoustic wave characteristics, images, and video information to obtain the relationship between the control parameters, the acoustic wave characteristics, and the morphology of the discharged gas; the morphology of the discharged gas is obtained from the images and video information; and a fluid circulation system for adjusting the water depth, flow rate, and water temperature of the seawater in the water tank.

[0007] In some embodiments, the fluid circulation system includes an inlet pipe, a return pipe, a circulating water pump, an inlet grille, a return grille, a heat exchanger, an inlet pipe, and a drain pipe; the circulating water pump and the inlet grille are connected via the inlet pipe, and the return grille and the circulating water pump are connected via the return pipe; both the inlet grille and the return grille are disposed within the water tank; the inlet pipe is connected to the return pipe, and the drain pipe is connected to the inlet pipe; the heat exchanger is disposed on the inlet pipe.

[0008] In some embodiments, the end-venting device includes a microporous release plate and a bubble release plate; the microporous release plate is used to simulate the gas emission of the underwater device's own gas emission system; the bubble release plate is used to simulate the gas emission of the underwater device's acoustic decoy system.

[0009] In some embodiments, the microporous release plate includes multiple microporous aerator interfaces, each of which is used to connect to one microporous aerator; the multiple microporous aerator interfaces can connect to multiple microporous aerators, wherein the multiple microporous aerators are of the same model or at least two microporous aerators are of different models; the microporous release plate includes a main gas supply pipe and multiple branch gas supply pipes, each of which is connected to one of the microporous aerator interfaces; each branch gas supply pipe is provided with a switch valve.

[0010] In some embodiments, the bubble release plate includes a plurality of air outlet units, the bubble release plate includes a main air supply pipe and a plurality of branch air supply pipes, each branch air supply pipe is connected to one air outlet unit; each branch air supply pipe is provided with a switch valve; each air outlet unit includes a first diameter air outlet, a second diameter air outlet and a third diameter air outlet with different aperture sizes, wherein the aperture of the first diameter air outlet is larger than the aperture of the second diameter air outlet, the aperture of the second diameter air outlet is larger than the aperture of the third diameter air outlet, and the second diameter air outlet and the third diameter air outlet are arranged around the first diameter air outlet.

[0011] In some embodiments, the gas release parameter adjustment system includes: multiple different gas source cylinders, which are used to generate at least one of hydrogen, nitrogen, and carbon dioxide gas; a cylinder valve, with one cylinder valve connected to each gas source cylinder for controlling the gas composition; a pressure reducing valve, a pressure gauge, and a pressure gauge valve for controlling and adjusting the gas release pressure difference; and a throttling valve and a flow meter for controlling the gas release flow rate.

[0012] In some embodiments, the gas release parameter adjustment system includes a main pipeline, on which the pressure reducing valve, pressure gauge, pressure gauge valve, throttle valve and flow meter are installed, and the main pipeline is connected to the gas transmission main.

[0013] In some embodiments, the fluid circulation system further includes a temperature sensor and a flow rate sensor, which are mounted on the support and positioned in the direction of water flow; a temperature sensor and a flow rate sensor are mounted before and after the end exhaust device; a pressure control system is provided on the top of the water tank to simulate water depth pressure; a reflective film is attached around the water tank to enhance the visibility of the water; and an observation window is provided on the side of the water tank to observe the test conditions.

[0014] The acoustic wave testing device also includes: a lighting system with lights installed at the top and bottom of the water tank for illuminating the water; and a frame structure system for mounting a hydrophone array and a high-speed camera.

[0015] In some embodiments, an acoustic testing method for underwater equipment is also provided. The acoustic testing method is applied to the acoustic testing apparatus described in any of the above embodiments. The acoustic testing method includes: simulating an underwater environment and acquiring underwater environment information, the underwater environment information including at least flow velocity, water temperature, and water pressure; generating different control commands based on the flow velocity, water temperature, and water pressure, the different control commands corresponding to different control parameters, for controlling a gas release parameter adjustment system; controlling the gas release parameter adjustment system to release gas according to the control parameters, so that the end exhaust device discharges the gas; acquiring acoustic characteristic information of the gas; and constructing a digital model based on the environmental information, control parameters, and the acoustic characteristic information corresponding to the control parameters, the digital model being used to obtain the correspondence between the control parameters and the environmental information and acoustic characteristic information.

[0016] In some embodiments, a gas emission method for an underwater device is also provided. The gas emission method includes: receiving control information sent by the underwater device and obtaining environmental information; obtaining target acoustic wave characteristic information based on the control information; generating control instructions for control parameters corresponding to the target acoustic wave characteristics based on a digital model, the target acoustic wave characteristic information, and the environmental information, wherein the control parameters include gas composition, gas release pressure difference, and gas release flow rate; and controlling the gas emission of the underwater device's own gas emission system and / or the gas emission of the underwater device's acoustic wave characteristic deception system according to the control instructions; wherein the digital model is obtained by the aforementioned acoustic wave testing method for the underwater device.

[0017] Compared to existing technologies, the beneficial effects of this application are at least as follows: In the embodiments of this application, by setting up a bubble release system capable of generating multiple bubble clusters, a sensor system, a camera system, a fluid circulation system, and other environmental parameters simulating real-world conditions, as well as control parameters required for the experiment, in the experimental apparatus, accurate acquisition of experimental results is achieved. This enables the experiment to perform experimental functions in multiple different scenarios and achieve high-precision result measurement, thereby solving the problems of single experimental function and low measurement accuracy in existing technologies. The embodiments of this application can be simultaneously applied to the simulation testing of acoustic feature deception systems and self-exhausting systems, and the experimental results can be used to control gas emissions.

[0018] The embodiments of this application provide an acoustic testing apparatus, method, and gas emission method for underwater equipment. The design of a multi-parameter control and acquisition system enables more diverse and high-precision testing of different acoustic characteristics. By establishing a digital model, acoustic characteristic control information is generated in real time. This can be applied to the development, design, and manufacturing of various marine underwater equipment, including marine exploration equipment, seabed platforms, and underwater robots. It is understood that the beneficial effects of this application extend far beyond these; other beneficial effects can be found in the relevant descriptions in the specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structural composition of a ship according to an embodiment of this application.

[0020] Figure 2 for Figure 1 The diagram shows a ship.

[0021] Figure 3 for Figure 1 The diagram shows the control method flowchart for the ship.

[0022] Figure 4 This is a schematic diagram of the structural composition of an acoustic feature deception system according to an embodiment of this application.

[0023] Figure 5 for Figure 4 The diagram shows a system schematic of one embodiment of the acoustic feature deception system.

[0024] Figure 6 for Figure 5 A schematic diagram of a dryer apparatus according to another embodiment of the acoustic feature deception system shown.

[0025] Figure 7 for Figure 4 The flowchart shown is a method for applying an acoustic feature deception system.

[0026] Figure 8 This is a schematic diagram of the underwater equipment acoustic testing device according to an embodiment of this application.

[0027] Figure 9 This is a schematic diagram of the structure of a bubble release plate according to an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of the structure of a bubble release plate according to another embodiment of this application.

[0029] Figure 11 for Figure 8 The flowchart shows the test method for the underwater equipment acoustic test device.

[0030] Figure 12 for Figure 8 A flowchart illustrating one application method of the test results from the underwater equipment acoustic testing device shown.

[0031] Figure 13 This is a schematic diagram of the overall application environment of the acoustic system of an underwater device according to some embodiments of this application.

[0032] Figure 14 This is a schematic diagram of an acoustic feature deception system according to some embodiments of this application.

[0033] Figure 15 This is a schematic diagram of a microporous release plate according to some embodiments of this application. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Figure 13 This diagram illustrates the overall application environment of the acoustic system of an underwater device in some embodiments of this application. The underwater device in some embodiments of this application can be a ship capable of underwater navigation. (Reference) Figure 13 The overall application environment of the underwater device's acoustic system includes at least a ship 100, at least one acoustic signature decoy system 200, and an acoustic testing device 300. The underwater device itself includes at least one gas emission system 400 for discharging excess gas or waste gas generated within the underwater device. The gas emission system 400 includes a microporous aerator, and the acoustic signature decoy system 200 includes a bubble release plate. The acoustic testing device 300 includes at least a microporous release plate and a bubble release plate. The microporous release plate is used for testing the microporous aerator, simulating the exhaust test of the gas emission system. The bubble release plate is used to simulate the exhaust test of the acoustic signature decoy system.

[0037] In one aspect, this application provides a ship 100 in some embodiments, which includes a gas emission system 400 and at least one acoustic signature decoy system 200. The ship 100 includes a first data acquisition device 130 and a first data transmission device 140. The first data acquisition device 130 is used to acquire real-time status information of the ship 100, and the first data transmission device 140 is used to transmit control information to the acoustic signature decoy system 200.

[0038] Among them, such as Figure 1 andFigure 2 As shown, the ship 100 includes a processor 120, a first data acquisition device 130, a first data transmission device 140, a second data receiving device 150, and multiple acoustic signature decoy systems 200. Specifically, the first data acquisition device 130, the first data transmission device 140, and the second data receiving device 150 are all mounted on the ship's hull 110. The first data acquisition device 130 is used to collect real-time status information of the ship's hull 110 to obtain first acoustic signature information. The first data transmission device 140 is used to send control information to the acoustic signature decoy systems 200. The processor 120 is used to analyze the first acoustic signature information collected by the first data acquisition device 130 to generate control information.

[0039] like Figure 2 and Figure 4 As shown, in one specific embodiment, the plurality of acoustic feature decoy systems 200 include at least one acoustic feature decoy system 201, which is installed on the ship's hull 110, and at least one acoustic feature decoy system 202, which is remotely controlled by the ship's hull 110. A first data receiving device 270 is provided on each acoustic feature decoy system. The first data receiving device 270 receives control information transmitted from a first data transmitting device 140. The control information varies depending on the acoustic feature simulation characteristics that different acoustic feature decoy systems 200 need to achieve; that is, the control information is set one-to-one according to the differences of each acoustic feature decoy system 200. The first acoustic signature decoy system 201, installed on the hull 110, generates a bubble cluster according to control commands to alter the acoustic signature of the hull 110 itself. This is used to confuse, lure, or drive away objects that pose a threat to the hull 110, such as large, aggressive underwater creatures, causing them to move away from or refrain from attacking the ship 100, thus protecting the hull 110. The second acoustic signature decoy system 202, remotely controlled by the hull 110, generates a bubble cluster according to control commands to simulate the acoustic signature of a certain underwater device or the acoustic signature of the ship 100 itself, or to simulate the acoustic signature of the hull 110. This is used to confuse and lure objects that pose a threat to the hull 110, causing them to mistakenly believe that the underwater autonomous device containing the second acoustic signature decoy system 202 is the ship 100 or other underwater equipment, thus protecting the actual ship 100.

[0040] Specifically, in some embodiments, the first acoustic signature decoy system is fixedly installed on the ship, and the second acoustic signature decoy system includes an underwater autonomous device that can be located away from the ship and is remotely controlled by the ship.

[0041] In some embodiments, to more accurately measure the acoustic characteristics generated by the ship's hull 110, in addition to obtaining the first acoustic characteristic information through the first data acquisition device 130 installed on the ship's hull 110, a data acquisition device 250 and a second data transmission device 280 are installed on the second acoustic characteristic decoy system 202, which is remotely controlled by the ship's hull 110. The data acquisition device 250 remotely acquires the second acoustic characteristic information radiated by the ship's hull 110, and then transmits the acquired second acoustic characteristic information to the ship's hull 110 through the second data transmission device 280. The processor 120 on the ship's hull 110 comprehensively analyzes the first and second acoustic characteristic information to obtain accurate acoustic characteristic information of the ship's hull 110, and then generates control information based on the accurate acoustic characteristic information to control different acoustic characteristic decoy systems 200 respectively. Therefore, the second data receiving device 150 installed on the ship's hull 110 is used to receive the second acoustic characteristic information transmitted by the remote acoustic characteristic decoy system 200.

[0042] The processor 120 obtains control information after analyzing the first acoustic wave feature information and / or the second acoustic wave feature information. In one specific embodiment, the ship 100 also includes a memory storing a preset program algorithm. This program algorithm generates a conversion relationship of control information simulating the acoustic wave feature information based on the acoustic wave feature information of the ship body 110 itself, or generates control information simulating the preset acoustic wave feature information based on preset acoustic wave feature information. The control information is a control command that controls the release parameters of the gas released by the acoustic wave feature deception system 200; the conversion relationship is obtained through testing with an acoustic wave testing device.

[0043] In another embodiment, the first data acquisition device 130 includes an acoustic sensor system and a camera system, and the data acquisition device 250 includes an acoustic sensor system, which includes a hydrophone array 350. The first data acquisition device 130 acquires various types of information, including graphic information and acoustic feature information, as well as information such as water flow velocity, temperature, and water depth around the hull 110. The graphic information can be used to assist in analyzing the acoustic feature information of the hull 110. The water flow velocity, temperature, and water depth information enable the control information generated by the processor 120 to more accurately simulate the desired acoustic features on the corresponding acoustic feature decoy system 200; while the acoustic feature decoy system 200 only needs to acquire the acoustic feature information of the hull 110, because it is generally difficult and not very meaningful for a remotely controlled acoustic feature system to acquire remote graphic information of the hull 110. However, in some other embodiments, the data acquisition device 250 of the acoustic feature decoy system 200 also includes acquiring environmental information around the acoustic feature decoy system 200, such as water flow velocity, temperature, and water depth. The environmental information of the acoustic feature decoy system 200 is provided to the processor 120 of the ship body 110. Combining this information to generate control information can more accurately help the processor 120 generate control information with higher control precision, so that the corresponding acoustic feature decoy system can simulate the acoustic features required by the control information with higher precision in the environment.

[0044] In another embodiment, the ship 100 includes a memory storing various pre-stored information, such as acoustic wave characteristic information of various underwater devices or the ship 100. After analyzing the first acoustic wave characteristic information and / or the second acoustic wave characteristic information, the processor 120 obtains control information. Furthermore, based on the acoustic wave characteristic information collected by the ship body 110 or the pre-stored information, it generates multiple different real-time control messages according to user input instructions. Each real-time message is sent to the corresponding acoustic wave characteristic decoy system 200 through the first data transmitting device 140. The user input includes the user's settings for the simulation functions and motion control of each acoustic wave characteristic decoy system 200. For example, A simulates the acoustic wave characteristics of the ship body 110, B simulates the acoustic wave characteristics of another type of ship, and D on the ship body 110 generates a certain acoustic wave characteristic to change the acoustic wave characteristics of the ship body 110. The processor 120 controls each acoustic wave characteristic decoy system 200 to achieve different motion speeds, motion directions, etc. In some embodiments, the processor 120 generates control information for the corresponding acoustic feature decoy system 200 to simulate its own acoustic features based on the acoustic feature information collected by the hull body 110 and user input. In some embodiments, based on user input, such as input simulating the acoustic features of another underwater device, the processor 120 obtains the pre-stored acoustic feature information of that underwater device, and then generates control information for the corresponding acoustic feature decoy system 200 to simulate that underwater device.

[0045] In a specific embodiment, when the ship body 110 generates control information based on pre-stored acoustic feature information, first acoustic feature information, and / or second acoustic feature information, it needs to combine the environmental information of the corresponding acoustic feature decoy system 200 to ensure that the generated control information, when executed on the corresponding acoustic feature decoy system 200, accurately simulates the desired acoustic features. Furthermore, when the required acoustic features cannot be simulated in the environment of the acoustic feature decoy system 200, the control information also includes controlling the acoustic feature decoy system 200 to adjust the environment, such as adjusting the water flow speed by accelerating or decelerating, or adjusting the water depth by sinking or surfacing, to ensure that the environment meets the simulation requirements for the desired acoustic features.

[0046] In some embodiments, the acoustic signature decoy system further includes a gas source, an acoustic signature decoy control device, and a terminal exhaust device. The gas source is used to store at least one gas. The acoustic signature decoy control device is used to adjust gas release according to the gas release parameters. The gas is released through the terminal exhaust device, thereby generating a cluster of bubbles that conform to the acoustic signature of the control information. In some embodiments, the acoustic signature decoy system 200 further includes a hydrogen production device, which is the ship's existing water electrolysis oxygen production device. The hydrogen production device is used to electrolyze water to produce hydrogen gas. The gas stored in the gas source of the acoustic signature decoy system includes at least the hydrogen gas. In some embodiments, the second acoustic signature decoy system described above includes an underwater autonomous device, wherein the underwater autonomous device includes at least a gas source, an acoustic signature decoy control device, and a terminal exhaust device. The acoustic signature decoy control device generates a cluster of bubbles by controlling the gas source to discharge from the terminal exhaust device to simulate a specified acoustic signature. The underwater autonomous device, acting as the execution component of the second acoustic signature decoy system, can be controlled to move to a designated underwater environment and generate a designated bubble swarm to simulate acoustic features. The control and other related components of the second acoustic signature decoy system are independently configured; they can be mounted on the ship's hull or remotely controlled from the ship. Furthermore, the second acoustic signature decoy system can include multiple underwater autonomous devices, which work together to perform the designated acoustic signature simulation function. Detailed features of the acoustic signature decoy system will be further described in some of the embodiments below.

[0047] In some embodiments of this application, the first acoustic feature decoy system is used to generate an acoustic interference signal that differs from the acoustic feature information of the ship. The second acoustic feature decoy system is used to generate an acoustic decoy signal identical to the acoustic feature information of the ship. This acoustic decoy signal is generated by control commands of control parameters corresponding to the acoustic feature information of the ship. These control parameters include gas composition, gas release pressure difference, and gas release flow rate. The control commands are generated based on a digital model, the acoustic feature information of the ship, and the environmental information of the second acoustic feature decoy system. The digital model is obtained using an acoustic testing method. The gas emission system is used to generate a bubble cluster with minimal noise from the microporous aerator based on the digital model and the environmental information of the ship. Specifically, the acoustic testing method refers to the acoustic testing apparatus described below.

[0048] In another aspect, some embodiments of this application propose a ship acoustic signature deception system. (Reference) Figure 4 and Figure 5 In some embodiments, the acoustic feature deception system may be a first acoustic feature deception system or a second acoustic feature deception system.

[0049] The acoustic signature deception system includes: a gas source of at least one gas, a first data receiving device 270, a data processing device 240, an acoustic signature deception control device 260, and an end exhaust device, wherein the end exhaust device includes a bubble release plate 330.

[0050] In some embodiments, the gas includes at least one of hydrogen, oxygen, and carbon dioxide. A first data receiving device 270 is used to receive control information sent by the ship 100; a data processing device 240 is used to generate gas release parameters based on the control information; and an acoustic signature decoy control device 260 is used to adjust gas release according to the gas release parameters, i.e., the acoustic signature decoy control device 260 is a control execution device; specifically, it controls the corresponding valve according to the gas release parameters to release the gas from the gas source. In some embodiments, the gas is hydrogen, and the gas source includes a metal hydrogen storage device 230. The hydrogen can be produced by a hydrogen production device 210 in the acoustic signature decoy system 200, such as an electrolytic water hydrogen production device 210. In some embodiments, the hydrogen is obtained and stored by an oxygen production device installed on the ship's hull 110, such as an electrolytic water oxygen production device, while producing oxygen, and then installed on the acoustic signature decoy system 200 as a gas source. The bubble release plate 330 is used to generate a bubble cluster, which is generated by a number of air outlets provided in the bubble release plate 330. Gases with different pressure differences, flow rates or flow velocities generated by the acoustic wave feature deception control device 260 are released through the bubble release plate 330 and then generate corresponding bubble clusters after passing through the number of air outlets. The acoustic wave features generated by the bubble cluster are the same as the acoustic wave feature information to be simulated corresponding to the control information, thereby realizing the function of simulating acoustic wave features that conform to the control information.

[0051] In another embodiment, the gas source further includes a hydrogen production device 210, which produces hydrogen by electrolyzing water, and the generated hydrogen is stored in a metal hydrogen storage device 230.

[0052] In some other embodiments, the acoustic signature deception system 200 further includes a pretreatment device 220 for at least cooling and drying the hydrogen produced by the hydrogen production device 210.

[0053] like Figure 6As shown, in some embodiments, the pretreatment device 220 includes at least two dryers. The main pipeline from the gas source is divided into multiple sub-pipelines. Each sub-pipeline is connected to a switch valve and then connected to the inlet of the corresponding dryer. Each dryer has an outlet pipeline with a moisture detection sensor installed on the outlet pipeline. The outlet of each dryer is connected to the inlet of other dryers through connecting pipelines. Each connecting pipeline is equipped with a switch valve. The processor 120 also includes controlling the opening or closing of each switch valve based on the information from the moisture detection sensor. Specifically, the dryer includes a first dryer 221 and a second dryer 222. The main pipeline is divided into two branch pipelines. The first branch pipeline is equipped with a first valve 225 and connects to the first dryer 221. The second branch pipeline is equipped with a third valve 227 and connects to the second dryer 222. The outlet pipeline of the first dryer 221 is equipped with a second valve 226, and the outlet pipeline of the second dryer 222 is equipped with a fourth valve 228, which are then combined. The inlet of the first dryer 221 and the outlet of the second dryer 222 are connected by a first connecting pipe, and the outlet of the first dryer 221 and the inlet of the second dryer 222 are connected by a second connecting pipe. A sixth valve 228 is installed on the first connecting pipe. 92. A fifth valve 291 is provided on the second connecting pipe. The first dryer 221 and the second dryer 222 connected in this way can control the flow of hydrogen through the first dryer 221 and / or the second dryer 222 by opening and closing different valves. This design can realize the individual use or series use of the two dryers. When the drying effect of one dryer drops to a preset value, it can be connected in series to pass hydrogen into the other dryer. When one of the dryers is below the warning range, the series connection is disconnected, so that the dryer below the warning range can be buffered to restore the drying effect. This scheme that can be used in series can maximize the use of each dryer without reducing the drying effect of hydrogen.

[0054] In one embodiment, such as Figure 10As shown, the bubble release plate 330 includes a cavity component 331 and an aperture switching component 334. The cavity component 331 includes an air inlet and an air outlet panel. The air outlet panel is provided with a plurality of first air outlet holes 333 arranged in an array. The aperture switching component 334 includes a switching plate, which is provided with a plurality of second air outlet holes 332 corresponding to the air outlet panel. The switching plate is disposed above the air outlet panel and can have at least a first position and a second position relative to the air outlet panel. In the first position, the first air outlet holes 333 and the second air outlet holes 332 are completely aligned, so that the bubble release plate 330 has the maximum air outlet diameter. In the second position, the first air outlet holes 333 and the second air outlet holes 332 are at least partially offset, so that the bubble release plate 330 has the minimum air outlet diameter. In this way, by controlling the position of the switching plate, the size of the air outlet of the bubble release plate 330 can be adjusted. In combination with the control of gas release parameters, more types of bubble groups can be generated, thereby simulating more types of sound wave characteristics. Among them, the diameter of several first air outlet holes 333 can be the same or multiple different diameter holes.

[0055] refer to Figure 14 Specifically, in some embodiments, the ship acoustic signature deception system 200 proposed in this application includes: a hydrogen production device 210, which is used to electrolyze water to produce hydrogen gas.

[0056] Metal hydrogen storage device 230, which is used to store hydrogen.

[0057] The data acquisition device 250 is a second data acquisition device used to acquire the real-time status information of the ship 100. The real-time status information of the ship 100 acquired by the data acquisition device 250 includes acoustic feature information.

[0058] The data processing unit 240 is used to generate hydrogen release parameters based on the real-time status information of the ship 100.

[0059] An acoustic signature deception control device is used to adjust hydrogen release based on hydrogen release parameters.

[0060] The end exhaust device includes a bubble release plate 330 through which hydrogen is released to generate a group of bubbles that simulate the acoustic characteristics of a ship 100. The bubble release plate has several vent holes.

[0061] In the embodiments of this application, hydrogen has poor solubility in seawater and low density, resulting in prominent exhaust acoustic characteristics that facilitate acoustic deception. By dynamically adjusting hydrogen release parameters, the acoustic characteristics of a ship can be accurately simulated, achieving a significant deception effect. The combination of electrolytic hydrogen production and metal hydrogen storage technologies provides a stable and reliable resource supply in underwater environments, eliminating the need for ships to store high-pressure air. The system can dynamically adjust acoustic deception parameters based on the ship's real-time status and the underwater acoustic environment, demonstrating strong adaptability.

[0062] In some embodiments, a pressure greater than 3 MPa is applied to the electrolytic cell of the hydrogen production device 210, so that the water electrolysis reaction is carried out under high pressure. This allows the hydrogen produced by water electrolysis to be fed into the subsequent deaerator 224, cooler 223 and dryer by the pressure in the electrolytic cell, and to be pressurized into the metal hydrogen storage device 230, without the need for an additional pressurization device.

[0063] In another embodiment, the data acquisition device 250 also acquires environmental information around the location of the acoustic feature deception system 200, including information such as water flow, temperature, and water depth in the surrounding environment.

[0064] like Figure 4 As shown, the acoustic signature decoy system 200 also includes a first data transmitting device 140, which is used to send the real-time status information and environmental information of the ship 100 collected by the data acquisition device 250 to the ship 100 so that the ship 100 can better control the acoustic signature decoy system 200.

[0065] In another embodiment, the acoustic signature deception system 200 further includes a memory storing pre-stored simulation information of various types of acoustic signatures. For example... Figure 4 As shown, the acoustic simulation system also includes a second data receiving device 150, which is used to receive control information sent by the ship 100. When the control information is an instruction for an acoustic feature corresponding to a type of simulation information pre-stored in the simulation memory of the acoustic feature deception system 200, the data processing device 240 generates hydrogen release parameters according to the corresponding pre-stored simulation information.

[0066] In another embodiment, the acoustic signature deception system 200 further includes a pretreatment device for at least cooling and drying the hydrogen produced by the hydrogen production device 210.

[0067] Specifically, the pretreatment device includes a cooler 223 and at least two dryers connected in parallel, with a switching valve at the inlet of each dryer and a moisture detection sensor at the outlet of each dryer. The processor 120 also includes controlling the opening or closing of each switching valve based on information from the moisture detection sensors. Specifically, as... Figure 5 and Figure 14 As shown, the pretreatment device includes a cooler 223, a first dryer 221, and a second dryer 222. The main pipeline is divided into a first branch connecting to the first dryer 221 and a second branch connecting to the second dryer 222. A first valve 225 is installed on the first branch, and a third valve 227 is installed on the second branch. A second valve 226 is installed at the outlet of the first dryer 221, and a fourth valve 228 is installed at the outlet of the second dryer 222 before they merge. By using these two parallel dryers, either dryer can be used alternately. When the drying effect of the currently used dryer on hydrogen is insufficient, the opening and closing of the corresponding valve is controlled to block hydrogen from entering the current dryer and introduce hydrogen into the other dryer, thus providing time for the used dryer to recover its drying effect.

[0068] In some embodiments, the connection method of the first dryer 221 and the second dryer 222 can also be adopted. Figure 6 The connection method shown in the embodiment.

[0069] In some embodiments, the purpose of the cooler 223 is to lower the temperature of the hydrogen, allowing moisture in the hydrogen to condense and be better separated from the hydrogen, thus improving the drying effect of the subsequent dryer 221. Therefore, the cooler 223 needs to be placed before the dryer, and the hydrogen is cooled by the cooler 223 before entering the dryer. In a specific embodiment, the saturated water vapor and trace amounts of oxygen in the source hydrogen produced by the hydrogen production device 210 are purified into pure hydrogen with a purity greater than 99.99% and a dew point lowered to below -50°C after passing through the deoxygenator 223, cooler 223, and dryer in sequence. Only pure hydrogen that meets the standard can be directly stored in a metal hydrogen storage tank.

[0070] In one specific embodiment, a moisture detection sensor is installed at the outlet of each dryer 221 to detect the moisture content of the hydrogen passing through the dryer 221, thereby determining whether the drying of hydrogen by the dryer 221 meets the requirements. If not, the opening and closing of the corresponding valve is controlled to switch the use of the dryer 221 to ensure that the drying of hydrogen meets the requirements.

[0071] In another embodiment, such as Figure 5As shown, the pretreatment device 220 also includes a deoxygenator 224, which is located at the outlet of the hydrogen production device 210. The hydrogen is purified by the deoxygenator 224, and then the purified hydrogen is passed into the cooler 223, dried by the dryer, and then passed into the metal hydrogen storage tank 231 for storage. The inlet of the metal hydrogen storage tank is equipped with a seventh valve 232. When the hydrogen is full, the seventh valve 232 is closed, and a new metal hydrogen storage tank is replaced to continue injecting hydrogen.

[0072] In another embodiment, the metal hydrogen storage device 230 uses a titanium-based hydrogen storage alloy for hydrogen storage, with a hydrogen filling pressure greater than 2 MPa and a hydrogen release pressure of 0.2 MPa to 0.8 MPa. The hydrogen filling pressure greater than 2 MPa enhances the hydrogen storage reaction, thereby improving the metal hydrogen storage capacity. The hydrogen release pressure of 0.2 MPa to 0.8 MPa provides a better hydrogen release rate during release, improving the hydrogen release reaction. In one embodiment, the gas source for the underwater autonomous device in the second acoustic decoy system 202 is a metal hydrogen storage device containing stored hydrogen.

[0073] In another embodiment, the metal hydrogen storage device 230 includes a heat exchange unit and a metal hydrogen storage tank 231, with seawater as the heat exchange medium in the heat exchange unit. The heat exchange unit at least encloses the metal hydrogen storage tank 231 of the hydrogen storage device. The exchange unit also includes a pump, an inlet, and an outlet. The processor 120 is further configured to control the pump's seawater extraction rate based on hydrogen addition or release information to achieve better heat exchange with the metal hydrogen storage device 230. When hydrogen is added, heat is released, causing the metal hydrogen storage tank 231 to heat up. Therefore, the flow rate of the extracted seawater needs to be controlled according to the temperature to cool the metal hydrogen storage tank 231. Conversely, when hydrogen is released, heat is absorbed, causing the temperature of the metal hydrogen storage tank 231 to decrease. Therefore, the flow rate of the extracted seawater needs to be controlled according to the temperature to raise the temperature of the metal hydrogen storage tank 231, preventing the hydrogen release temperature from becoming too low.

[0074] In another embodiment, the data acquisition device 250 includes a hydrophone array, a temperature sensor, a water flow velocity measurement sensor, a water depth measurement sensor, etc., and the real-time status information of the ship 100 includes the ship 100's self-noise data.

[0075] In another embodiment, the hydrogen release parameters include hydrogen release pressure differential, hydrogen release flow rate, hydrogen release depth, release time, release flow rate, etc.

[0076] In one embodiment, the acoustic decoy control device includes a differential pressure control valve 2601, a flow regulating valve 2602, a flow meter 2603, and a depth regulating device, used to adjust the hydrogen release differential pressure, hydrogen release flow rate, and depth of the underwater autonomous equipment according to hydrogen release parameters. One end of the differential pressure control valve 2601 is located inside the hull, and the other end is located outside the hull, in contact with seawater. During release, the depth regulating device can be an active drive device used to raise the underwater autonomous equipment to a depth of no more than 80m, and then slowly release the gas. In the embodiments of this application, the differential pressure control valve uses the pressure of seawater as a reference pressure to dynamically adjust the pressure difference between the hydrogen release pressure and the seawater pressure, achieving precise control.

[0077] In the embodiments of this application, the acoustic characteristics of a ship under different motion states, such as propeller noise and mechanical vibration, are simulated by adjusting the hydrogen release rate, flow rate, and pressure. The acoustic characteristic deception control device employs a differential pressure control valve, a flow regulating valve, and a flow meter, which can precisely control the hydrogen release flow rate and release differential pressure parameters, thereby achieving high-precision simulation of the ship's acoustic characteristics. Furthermore, the differential pressure control valve and flow regulating valve can regulate the hydrogen emission differential pressure and emission flow rate, which are directly related to the hydrogen emission noise. Generally, the larger the emission differential pressure and the larger the exhaust flow rate, the louder the hydrogen emission noise and the lower the dominant characteristic frequency; conversely, the smaller the emission differential pressure and the smaller the exhaust flow rate, the quieter the hydrogen emission noise and the higher the dominant characteristic frequency. By adjusting the emission differential pressure and emission flow rate, the acoustic characteristics of a ship with different radiated noise levels and frequency characteristics can be simulated.

[0078] In another respect, this application refers to Figure 8 This application proposes an acoustic testing device 300 for underwater equipment. For example... Figure 8 As shown, the acoustic wave testing device includes: a water tank 380 for filling with seawater to simulate an underwater environment; a support frame located at the bottom of the water tank 380 for housing an end-venting device for discharging gas; a gas release parameter adjustment system for adjusting the gas composition, gas release pressure difference, and gas release flow rate under different control parameters according to preset control commands; a sensor system for measuring the acoustic wave characteristics of the discharged gas under at least different control parameters; a camera system for generating images and videos of the discharged gas; a fluid circulation system 370 for adjusting the water depth, flow rate, and water temperature of the seawater in the water tank 380; and a data processing system 340 for analyzing the control parameters corresponding to different control commands and the corresponding acoustic wave characteristics, images, and videos to obtain the relationship between the control parameters, acoustic wave characteristics, and the shape of the discharged gas, wherein the shape of the discharged gas is obtained from the images and videos.

[0079] In the embodiments of this application, the camera system is used to measure the morphology of bubble swarm generation, shedding, merging, and bursting processes. A high-speed camera array captures images and videos of the bubbles in the water, which can be compared and analyzed with the measurement data from the acoustic sensor system. It can simultaneously measure the morphology of bubble swarm generation, shedding, merging, and bursting processes, measure acoustic characteristics, and adjust environmental parameters, meeting various experimental needs. In the embodiments of this application, a hydrophone can be used to perform time-domain and frequency-domain analysis of the acoustic signals of bubble swarm generation, shedding, merging, and bursting processes. A high-speed camera captures the morphology of bubble swarm generation, shedding, merging, and bursting processes, allowing for the measurement and analysis of the acoustic characteristics of the bubble swarm throughout the entire process. A gas release parameter adjustment system can be used to study the acoustic characteristics of underwater gas emissions under different emission flow rates and pressures; the gas emission parameters are adjustable.

[0080] In the embodiments of this application, the fluid circulation system can simulate underwater environments with different water depths, flow rates, and temperatures, expanding the scope of experimental application and demonstrating strong environmental adaptability.

[0081] In some embodiments, the interior of the water tank 380 is a sealed cavity, and the acoustic wave testing device also has a pressurizing device for pressurizing the water tank 380 to simulate different water depths within the water tank 380, thereby achieving the purpose of adjusting the simulated water depth by adjusting the pressure.

[0082] In some embodiments, the fluid circulation system includes an inlet pipe 377, a return pipe 378, a circulating water pump 373, an inlet grille 376, a return grille 371, a heat exchanger 374, an inlet pipe 3710, and a drain pipe 3711. The circulating water pump and the inlet grille are connected via the inlet pipe, and the return grille and the circulating water pump are connected via the return pipe. Both the inlet and return grilles are located within the water tank. The inlet pipe is connected to the return pipe, and the drain pipe is connected to the inlet pipe. The heat exchanger is located on the inlet pipe. In the embodiments of this application, by adding a fluid circulation system to the water tank, the inlet and return grilles are arranged opposite each other, the area of ​​the inlet and return grilles is larger than the cross-sectional area of ​​the end exhaust device, and the height of the inlet and return grilles is higher than the height of the end exhaust device, ensuring the accuracy of the environmental simulation.

[0083] In some embodiments, the fluid circulation system further includes a temperature sensor and a flow rate sensor, which are mounted on the support and positioned in the direction of water flow; temperature and flow rate sensors are mounted before and after the end exhaust device. In the embodiments of this application, the environmental information sensors in the fluid circulation system described above allow for convenient and accurate measurement of simulated environmental information, which can then be compared with preset conditions. In some embodiments, feedback regulation can be employed to achieve closed-loop control.

[0084] In some embodiments, the end-venting device includes a microporous release plate and a bubble release plate 330. The microporous release plate is used to simulate the gas emission of the underwater device's own gas emission system. The bubble release plate is used to simulate the gas emission of the underwater device's acoustic decoy system. In the embodiments of this application, both the gas emission simulation of the underwater device's own gas emission system and the gas emission simulation of the acoustic decoy system can be achieved, thus having a wide range of applications.

[0085] refer to Figure 15 Figures (a) and (b) show schematic diagrams of two sides of the microporous release plate, respectively. In some embodiments, the microporous release plate includes multiple microporous aerator interfaces 1501, each of which is used to connect to a microporous aerator 1502; the multiple microporous aerator interfaces can connect to multiple microporous aerators, wherein the multiple microporous aerators are of the same model or at least two microporous aerators are of different models. In the embodiments of this application, the microporous aerator has a porous structure, which can uniformly release bubbles and simulate bubble groups of different sizes. Of course, in some embodiments, the microporous release plate may include multiple microporous aerators 1502 and multiple microporous aerator interfaces 1501. The microporous aerator or the microporous release plate can be directly used for gas emission of the underwater equipment's own gas emission system.

[0086] In some embodiments, the microporous release plate includes a main gas supply pipe 1503 and multiple branch gas supply pipes 1504, each branch gas supply pipe being connected to one of the microporous aerator interfaces; each branch gas supply pipe is equipped with a switch valve (not shown). In the embodiments of this application, the number of microporous aerators connected can be controlled by the switch valve on each branch gas supply pipe, allowing simulation of different models of microporous aerators or different numbers of microporous aerators without replacing the microporous aerators.

[0087] In some embodiments, the bubble release plate includes multiple vent units, a main gas supply pipe, and multiple branch gas supply pipes, each branch pipe connecting to one vent unit; each branch pipe is equipped with a switching valve. In embodiments of this application, the bubble release plate is used to simulate the gas emission of the underwater device's acoustic characteristic deception system. By using the switching valve on each branch pipe, different combinations of vent units can be simulated to produce different acoustic characteristic effects.

[0088] In some embodiments, the gas release parameter adjustment system includes: multiple different gas source cylinders 310, which are used to generate at least one of hydrogen, nitrogen, and carbon dioxide gases; a cylinder valve 321, with one cylinder valve connected to each gas source cylinder for controlling the gas composition; a pressure reducing valve 322, a pressure gauge 323, and a pressure gauge valve 324 for controlling and adjusting the gas release pressure difference; and a throttle valve 325 and a flow meter 326 for controlling the gas release flow rate. In the embodiments of this application, the underwater emission bubble group acoustic characteristics of different component gases can be studied by switching and controlling the gas cylinder group, and underwater emission measurement of multiple combined gases can be achieved.

[0089] Specifically, such as Figure 8 As shown, the bracket includes legs 381 and a support surface 382. Legs 381 are fixed to the bottom surface of the water tank 380, and the bubble release plate is fixed to the support surface 382. The acoustic sensor system includes an array of hydrophones 350. Multiple hydrophones 350 are fixed at different positions inside the water tank 380 to collect acoustic wave characteristic information from multiple angles of the bubble release plate, enabling higher precision acquisition of the acoustic wave characteristics of the bubble group released by the bubble release plate.

[0090] In one embodiment, the gas release parameter adjustment system includes multiple gas sources, a gas release control device 320, a gas release plate, and a controller. The gas release control device 320 includes a pressure valve 324 and a flow valve. Control information includes control commands for the gas source mixing ratio, gas release pressure difference, and gas release flow rate within each time-sequence control interval. Within each time-sequence control interval, the controller controls at least one of the pressure valve 324 and the flow valve according to the control commands, thereby providing gas with different parameters to the bubble release plate to generate different bubble clusters. The gas release parameter adjustment system includes a main pipeline 327 and multiple gas delivery pipes branching from the main pipeline 327. At least one of the pressure valve 324, flow valve 325, and flow meter 326 is installed on the main pipeline 327, and each gas delivery pipe is equipped with a flow valve. Figure 8As shown, the gas source includes multiple different gas cylinders, which are used to generate at least one of hydrogen, nitrogen, and carbon dioxide gas; the gas release control device 320 includes various valves and pipelines, which control the combination and release of different gases in the gas source by adjusting the opening and closing or the degree of opening and closing of various valves. Specifically, as... Figure 8 As shown, the gas release control device 320 includes a main pipeline 327 and a bottle valve 321, a pressure reducing valve 322, a pressure gauge 323, a pressure valve 324, a throttle valve 325, and a flow meter 326 installed on the main pipeline 327. One end of the pipeline is connected to a gas source, and the other end is connected to a bubble release plate.

[0091] The sensor system includes at least an acoustic wave characteristic measurement sensor for measuring the acoustic wave characteristic information of the bubble swarm generated by the bubble release plate; in some other embodiments, the sensor system also includes at least one of a temperature sensor, a water flow velocity measurement sensor, and a water depth measurement sensor for measuring parameters such as water temperature, water flow velocity, and water depth, so as to obtain the conditions for the generation of the bubble swarm more accurately, so as to make subsequent calculations more accurate and more in line with the environmental conditions of actual applications.

[0092] like Figure 8 As shown, a water supply valve 372 is installed on the inlet pipe, and a drain valve 375 is installed on the drain pipe. A connecting water pipe, consisting of an inlet pipe 377 and a return pipe 378, is connected at one end to an inlet grille 376 and at the other end to a return grille 371. A circulating water pump 373 and a heat exchanger 374 are spaced apart on the connecting water pipe. The inlet and drain pipes are connected to the connecting water pipe for supplying or draining water to adjust the water level in the water tank 380. Based on test control information, the circulating water pump 373 is controlled to create a water flow within the connecting water pipe. The water flows through the inlet grille 376 into the water tank 380 and returns through the return grille 371, thus forming a circulating water path. Therefore, a water flow with velocity is formed between the inlet grille 376 and the return grille 371, and the flow rate of this water flow can be controlled by controlling the circulating water pump 373. The heat exchanger 374 is controlled to operate by means of control information to control the temperature of the water in the water tank 380, wherein the heat exchanger 374 includes a heater and a cooler.

[0093] The data processing system 340 compares a large amount of collected acoustic wave characteristic information, image information, water flow velocity, water depth, temperature, and the corresponding control parameters that generate this information, thereby establishing a relationship model between acoustic wave characteristic information and hydrogen release pressure difference, release amount, water flow velocity, temperature, water depth, etc.

[0094] In addition, the acoustic wave testing apparatus is equipped with a lighting system, which includes multiple lights 384 positioned at different locations within the water tank 380, such as the bottom and top of the tank. Reflectors 383 are also attached around the water tank 380 to refract light and enhance water visibility. Observation windows 385 are located on the sides of the water tank 380, allowing observation of the internal testing conditions through the windows and the illumination provided by the lights. The acoustic wave sensor system includes a hydrophone array 350, composed of multiple hydrophones 350. The camera system consists of multiple high-speed cameras. The water tank 380 includes a frame structure system for mounting the hydrophone array 350 and the high-speed cameras. The frame structure system may include a support bracket.

[0095] In another embodiment, the bubble release plate comprises a plurality of vent units 335, each vent unit 335 including at least two different vent diameters. The bubble release plate forms an array of vent units 335. Figure 9 As shown, the vent unit 335 consists of a first-diameter vent, a second-diameter vent, and a third-diameter vent, each with a different aperture size. The aperture of the first-diameter vent is larger than that of the second-diameter vent, and the aperture of the second-diameter vent is larger than that of the third-diameter vent. The second-diameter and third-diameter vents are arranged around the first-diameter vent. Specifically, as... Figure 8 As shown, there is one first-diameter air outlet, one second-diameter air outlet, and three third-diameter air outlets. The first-diameter air outlets and the second-diameter air outlets are arranged side by side, and the third-diameter air outlets are arranged sequentially at intervals along a straight line and located below the first-diameter air outlets and the second-diameter air outlets. Then, several such air outlet units 335 are arranged sequentially at intervals along the first direction and the second direction to form an array of air outlet units 335, so as to densely cover the air outlet panel of the bubble release plate.

[0096] In another embodiment, since the bubble cluster is related not only to the gas release parameters but also to the vent holes of the bubble release plate, in order to form multiple bubble clusters during the experiment, more bubble cluster combinations can be achieved by controlling the individual or combined vent holes of different diameters in the aforementioned vent hole unit 335 to release gas. To achieve independent control of vent holes of different diameters, the main pipeline 327 is branched into multiple gas supply pipes, each gas supply pipe being connected to a vent hole unit 335. Before each gas supply pipe is connected to the corresponding vent hole unit 335, it branches into multiple branch pipes with the same diameter. Each branch pipe is connected to a vent hole of the same diameter in the vent hole unit 335. The number of gas supply pipes is the same as the number of vent hole units 335, and the number of branch pipes is the same as the diameter type of the vent holes in the vent hole unit 335. Furthermore, a switching valve can be installed on each branch pipe to achieve independent control of the air outlet mode of each air outlet unit 335. This allows the entire bubble release plate to have various combinations of air outlet modes, facilitating experimental verification of the acoustic characteristics of more bubble groups, obtaining more data under different conditions, and making the subsequent relationship model more accurate. In some embodiments, the bubble release plate described above can also be applied to any of the acoustic feature decoy systems described above, enabling the acoustic feature decoy system to have multiple acoustic feature simulation functions.

[0097] In another embodiment, the main pipeline 327 branches into multiple gas supply pipes, the number of which is the same as the orifice diameter of the orifices in the orifice unit 335. Each gas supply pipe is connected to an orifice of a specific orifice diameter. Before connecting to the orifice of a corresponding orifice diameter, each gas supply pipe branches into multiple branch pipes of the same orifice diameter, the number of which is the same as the number of orifices of a corresponding orifice diameter. Each branch pipe is connected to an orifice of a corresponding orifice diameter. This configuration allows for independent control of orifices of different orifice diameters, enabling gas output from combinations of orifice diameters, such as gas output from one orifice diameter, gas output from any two orifice diameters, or gas output from three orifice diameters simultaneously. This also allows for verification of the acoustic characteristics of various bubble groups under multiple orifice diameter combinations, resulting in more data from different scenarios and more accurate subsequent relationship model establishment. In some embodiments, the bubble release plate in the above embodiments can also be applied to the acoustic feature deception system of any of the above embodiments, enabling the acoustic feature deception system to have multiple acoustic feature simulation functions.

[0098] In another respect, this application refers to Figure 8Specifically, in some embodiments, this application proposes an acoustic wave testing device for the aforementioned acoustic wave feature deception system 200. This acoustic wave testing device includes: a water tank 380 for filling with seawater to simulate an underwater environment; wherein the seawater can be an artificially prepared aqueous solution with the same composition ratio as seawater, or seawater extracted from an actual marine environment. Filling with seawater is used to simulate a real marine environment; a support frame located at the bottom of the water tank 380 for placing a bubble release plate; a hydrogen release parameter adjustment system for controlling different hydrogen release pressure differentials and hydrogen release flow rates; an acoustic wave sensor system for measuring the acoustic wave feature signals of the bubble swarm; a fluid circulation system 370 for adjusting the flow rate and water temperature of the seawater in the water tank 380; and a data processing system 340 for analyzing the acoustic wave feature signals of the bubble swarm measured by the acoustic wave sensor system and outputting the acoustic wave feature parameters of the bubble swarm.

[0099] In the embodiments of this application, the acoustic testing device of the acoustic feature deception system 200 can be the acoustic testing device 300 of the underwater equipment in any of the above embodiments. Specifically, the gas release parameter adjustment system can be specifically set as a hydrogen release parameter adjustment system. The gas source is specifically set as hydrogen.

[0100] Specifically, in some embodiments, the support includes legs 381 and a support surface 382. The legs 381 are fixed to the bottom surface of the water tank 380, and the bubble release plate is fixed to the support surface 382. The acoustic sensor system includes an array of hydrophones 350, with multiple hydrophones 350 fixed at different positions within the water tank 380 to collect acoustic feature information from multiple angles of the bubble release plate, enabling higher-precision acquisition of the acoustic features of the bubble group released by the bubble release plate.

[0101] The data processing system 340 compares a large amount of collected acoustic wave characteristic information, image information, water flow velocity, water depth, temperature, and the corresponding control parameters that generate this information, thereby establishing a relationship model between acoustic wave characteristic information and hydrogen release pressure difference, release amount, water flow velocity, temperature, water depth, etc. Based on this model, control parameters can be determined according to the acoustic wave characteristics required during application.

[0102] On the other hand, in another embodiment, a method for acoustic testing of underwater equipment is provided. This method is applied to the acoustic testing apparatus described in any of the above embodiments. The method includes: simulating an underwater environment and acquiring underwater environment information, including at least flow velocity, water temperature, and water pressure; generating different control commands based on the flow velocity, water temperature, and water pressure, each corresponding to a different control parameter, for controlling a gas release parameter adjustment system; controlling the gas release parameter adjustment system to release gas according to the control parameters, so that the end exhaust device discharges the gas; and acquiring the acoustic characteristic information of the gas. In the embodiments of this application, sensor systems, camera systems, etc., can be used to collect and analyze the acoustic characteristic information and graphic information of the bubble clusters generated during the test.

[0103] A digital model is constructed based on the environmental information, control parameters, and acoustic wave characteristic information corresponding to the control parameters. The digital model is used to obtain the correspondence between the control parameters and the environmental information and acoustic wave characteristic information.

[0104] The simulated underwater environment is achieved by controlling the water tank 380 and the fluid circulation system 370 to simulate the water temperature, depth, and flow velocity of the seawater environment. Then, the environmental information of the simulated environment is collected through the sensor system and camera system. The collected environmental information is used to check whether the simulated underwater environment meets the environmental conditions of the test design. If it does not meet the requirements, the water tank 380 and the fluid circulation system 370 are adjusted to adjust the simulated environment until the detected environmental information of the simulated environment is consistent with the environmental conditions of the test design.

[0105] In this embodiment, the control instructions are a series of control instructions generated in a certain time domain sequence according to the experimental items under the experimental design environmental conditions. This series of control instructions can be a series of control instructions generated according to the control variable method. The control instructions in different time sequences all include information on controlling multiple gas release parameters. The control instructions are sent to the gas release parameter adjustment system for execution.

[0106] In the embodiments of this application, the gas release parameter adjustment system can adjust the gas release parameters of the bottle valve 321, pressure reducing valve 322, pressure gauge valve 324, throttle valve 325, etc., according to the control command, thereby controlling the gas source to release the gas set in the test, and releasing bubbles through the end exhaust device to generate a bubble group.

[0107] Specifically, such as Figure 11 As shown, the acoustic testing method for underwater equipment includes the following steps.

[0108] S310 controls the gas release system to release gas according to the control parameters determined by the preset control command, so as to generate a group of bubbles.

[0109] The preset control commands are a series of control commands established based on the experimental objectives and the controlled variable method. Control parameters include control information on the opening and closing of various valves in the gas release control device 320, as well as control information such as water flow rate and water depth.

[0110] S320, acquire information collected by the sensor system, including at least one of the following: acoustic wave characteristic information of the bubble swarm, water flow velocity, water depth, and bubble swarm graphic information; wherein the sensor system includes an acoustic wave characteristic measurement sensor, a temperature sensor, a water flow velocity measurement sensor, and a water depth measurement sensor, etc.

[0111] S330 constructs a digital model of the control parameters and the corresponding acoustic wave characteristics to obtain the correspondence between the control parameters and the acoustic wave characteristics.

[0112] The process involves recording the acoustic wave characteristic information generated by any one type of control parameter, and constructing a digital model based on the recorded control parameter and the corresponding acoustic wave characteristic information to obtain the correspondence between the control parameter and the acoustic wave characteristic. Through this correspondence, the control parameter can be obtained based on the known acoustic wave characteristic, or the corresponding acoustic wave characteristic can be calculated based on the control parameter.

[0113] Some embodiments of this application also provide a computer device, including a memory, a processor 120, and a computer program stored in the memory and executable on the processor 120, wherein the processor 120 executes the program to implement the steps of the above-described ship 100 acoustic test method.

[0114] In some embodiments, this application proposes a method for acoustic testing of underwater equipment, the underwater equipment including a gas emission system and / or an acoustic signature decoy system. Specifically, a microporous release plate is used to simulate the gas emission of the underwater equipment's own gas emission system; the end exhaust device includes a microporous release plate and a bubble release plate. The bubble release plate is used to simulate the gas emission of the underwater equipment's acoustic signature decoy system. In some embodiments, the underwater equipment may be a ship 100. The acoustic signature decoy system may be a first acoustic signature decoy system and / or a second acoustic signature decoy system.

[0115] On the other hand, this application also provides a gas emission method for an underwater device, the gas emission method comprising the following contents and steps.

[0116] It receives control information sent by underwater equipment and obtains environmental information; the underwater equipment includes ships, offshore platforms, underwater robots, etc., and the control information can be sent to the acoustic decoy system and / or the gas emission system of the underwater equipment itself.

[0117] Based on the control information, target acoustic wave characteristic information is obtained; wherein, the data processing device or processor can generate the target acoustic wave characteristic information specified by the control information based on the control information and environmental information.

[0118] Based on the digital model, target acoustic wave characteristic information, and environmental information, control instructions are generated for the control parameters corresponding to the target acoustic wave characteristics. The control parameters include gas composition, gas release pressure difference, and gas release flow rate. The data processing device or processor obtains the corresponding control parameters by taking the target acoustic wave characteristic information and environmental information as inputs to the digital model obtained by the above-mentioned underwater equipment acoustic wave test method, and generates control instructions.

[0119] The control commands control the gas emission of the underwater device's own gas emission system and / or the gas emission of the underwater device's acoustic characteristic decoy system. The underwater device's own gas emission system controls gas emission according to the control information to alter the underwater device's own acoustic characteristics. Gas emission can be performed by a microporous release plate or a separate microporous aerator. A data processing device installed on the underwater device's own or remotely controlled acoustic characteristic decoy system generates control parameters according to the control commands. The acoustic characteristic simulation control device controls the bubble release plate or microporous release plate to release bubbles to generate a bubble cluster, thereby simulating the acoustic characteristics of the underwater device itself or other preset underwater device acoustic characteristics.

[0120] The digital model was obtained through the aforementioned acoustic testing method for underwater equipment.

[0121] On the other hand, in some embodiments, a control method for the aforementioned ships is proposed, such as... Figure 3 As shown, the method includes the following steps and contents.

[0122] Step S110: Obtain the real-time status information of the ship 100 and receive the acoustic feature information of the ship 100 collected by the remote acoustic feature deception system 200.

[0123] The real-time status information includes image information and first acoustic feature information collected by the first data acquisition device 130 in the ship body 110, and the acoustic feature information collected by the remote acoustic feature deception system 200 is the second acoustic feature information.

[0124] Step S120: Determine the accurate acoustic characteristic information of the ship 100 based on the real-time status information and acoustic characteristic information.

[0125] The processor 120 determines the accurate acoustic feature information of the ship body 110 based on the graphic information, the first acoustic feature information, and the second acoustic feature information. This accurate acoustic feature information is obtained by combining the acoustic feature information of the ship body 110 at near and far distances, and can more realistically reflect the state of the ship body 110.

[0126] Step S130: Generate control information based on accurate acoustic wave feature information and user input instructions; wherein, the control information includes multiple entries, and each entry corresponds to controlling an acoustic wave feature deception system 200.

[0127] The simulation function of each acoustic feature deception system 200 is determined by the user input instructions, and then the control information of each acoustic feature deception system 200 is generated based on the accurate acoustic features of the ship body 110 and / or the pre-stored acoustic features.

[0128] Some embodiments of this application also provide a computer device, including a memory, a processor 120, and a computer program stored in the memory and executable on the processor 120, wherein the processor 120 executes the program to implement the steps of the above-described ship 100 control method.

[0129] On the other hand, in some embodiments, this application proposes a method for deceiving ships using the above-mentioned acoustic feature deception system 200, the method including the following steps and contents.

[0130] Hydrogen gas was produced using the ship's existing water electrolysis oxygen generator.

[0131] The hydrogen is pretreated to obtain pure hydrogen, which is then stored using a metal hydrogen storage method. The hydrogen storage pressure is greater than 2 MPa. The pretreatment includes deoxygenation, cooling, and drying. The hydrogen obtained by water electrolysis is passed sequentially through a deoxygenator 224, a cooler 223, and a dryer. The hydrogen after drying in the dryer is pure hydrogen, which is then stored in a metal hydrogen storage device at a pressure greater than 2 MPa.

[0132] Based on the acoustic characteristics of the ship, a hydrogen release command is generated, and the release of stored hydrogen is controlled according to the release command; wherein, the data processing device of the acoustic characteristic deception system generates a release command that controls the hydrogen release parameters based on the acoustic characteristics, and the release command is sent to the acoustic characteristic simulation control device for execution.

[0133] The acoustic characteristics of the ship are either preset ship radiated noise characteristic data or obtained based on the ship's real-time status information.

[0134] Specifically, such as Figure 7As shown, the method of deceiving the ship using its acoustic signature includes the following steps and contents.

[0135] Step S210: Source hydrogen is produced by electrolysis of water.

[0136] In order to better facilitate the pretreatment process and pressurize the hydrogen into the metal hydrogen storage device 230 after obtaining the source hydrogen, the electrolytic cell of the hydrogen production unit 210 is set to operate at a pressure greater than 3 MPa. This ensures that the generated hydrogen itself has a high pressure to meet the requirements of subsequent pretreatment and pressurization into the metal hydrogen storage device 230. The hydrogen production unit 210 provides a pressure greater than 3 MPa. Because the electrolysis of water to produce hydrogen generates gas, the internal pressure can be regulated by controlling the pressure relief valve of the electrolytic cell, eliminating the need for a separate pressurization device and greatly simplifying the design of the unit.

[0137] Step S220: After pretreatment, the source hydrogen is used to obtain pure hydrogen, which is then stored using a metal hydrogen storage method, wherein the hydrogen storage pressure is greater than 2 MPa.

[0138] Since the source hydrogen obtained by electrolysis of water contains saturated water vapor and trace amounts of oxygen, and metal hydrogen storage requires pure hydrogen with extremely high purity and dryness, the pretreatment includes deoxygenation, cooling and drying operations.

[0139] In step S230, a hydrogen release command is generated based on the acoustic characteristics of the ship 100, and the release of stored hydrogen is controlled according to the release command.

[0140] The acoustic characteristics of the ship 100 are either preset acoustic characteristic data radiated by the ship 100 or obtained based on the real-time status information of the ship 100. The preset acoustic characteristic data mainly reflects the acoustic characteristics of the ship 100 under specific environments, including the ship 100's operating speed and water depth. Acoustic characteristics of the ship 100 are collected under specific environments, processed, and stored in the acoustic characteristic deception system 200. Upon receiving control information, the system retrieves the corresponding acoustic characteristic information and then simulates the data. In another embodiment, the acoustic characteristics can also be real-time acoustic characteristic information of the ship 100 collected by the ship 100 itself or collected by the acoustic characteristic deception system 200. Among them, the hydrogen release command is generated based on the acoustic characteristics of the ship 100. This is to generate control commands for hydrogen release parameters based on the known acoustic characteristics to be simulated and the correspondence between the acoustic characteristics and hydrogen release parameters. The hydrogen release parameters include hydrogen release amount, release pressure difference, etc.

[0141] Some embodiments of this application also provide a computer device, including a memory, a processor 120, and a computer program stored in the memory and executable on the processor 120. When the processor 120 executes the program, it implements the steps of the aforementioned acoustic wave testing method for underwater equipment, or the steps of the gas emission method for underwater equipment, or the steps of the control method for a ship. It is understood that the steps of the aforementioned acoustic wave testing method for underwater equipment, or the steps of the gas emission method for underwater equipment, or the steps of the control method for a ship, can be combined with each other without contradiction. The above embodiments are merely illustrative and are not the only limitation on the specific features of the related embodiments.

[0142] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this specification. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0143] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An acoustic testing apparatus for an underwater device, characterized by, The sound wave test device comprises: a water tank for filling seawater to simulate an underwater environment; a support located at the bottom of the water tank, the support being used for placing an end exhaust device for discharging gas; a gas release parameter adjustment system for realizing parameter adjustment of gas composition, gas release pressure difference and gas release flow rate under different control parameters according to control instructions; a sensor system for measuring at least sound wave characteristic information of the discharged gas under different control parameters; a camera system for generating picture and video information of the discharged gas; a data processing system for analyzing the control parameters corresponding to different control instructions and the sound wave characteristic information, picture and video information corresponding to the control parameters to obtain a relationship between the control parameters and the sound wave characteristic information and the form of the discharged gas, the form of the discharged gas being obtained from the picture and video information; a fluid circulation system for adjusting the water depth, flow rate and water temperature of seawater in the water tank.

2. The acoustic wave testing apparatus according to claim 1, wherein The fluid circulation system comprises a water inlet pipeline, a water return pipeline, a circulating water pump, a water inlet grid, a water return grid, a heat exchanger, a water inlet pipe and a drain pipe. The circulating water pump and the water inlet grid are connected through the water inlet pipeline, the water return grid and the circulating water pump are connected through the water return pipeline, and the water inlet grid and the water return grid are arranged in the water tank. The water inlet pipe is connected with the water return pipeline, and the drain pipe is connected with the water inlet pipeline. The heat exchanger is arranged on the water inlet pipeline.

3. The acoustic wave testing apparatus according to claim 1, wherein The end exhaust device comprises a micro-porous release plate and a bubble release plate. The micro-porous release plate is used for simulating gas discharge of a gas discharge system of the underwater equipment itself. The bubble release plate is used for simulating gas discharge of a sound wave characteristic decoy system of the underwater equipment.

4. The acoustic wave testing apparatus according to claim 3, wherein The micro-porous release plate comprises a plurality of micro-porous aerator interfaces, each of which is used for connecting a micro-porous aerator; a plurality of micro-porous aerators can be connected through the plurality of micro-porous aerator interfaces, and the plurality of micro-porous aerators are of the same type or at least two micro-porous aerators are of different types. The micro-porous release plate comprises a gas supply main pipe and a plurality of gas supply branch pipes, each of which is connected with a micro-porous aerator interface; and a switch valve is arranged on each gas supply branch pipe.

5. The acoustic wave testing apparatus according to claim 3, wherein The bubble release plate comprises a plurality of gas outlet hole units, a gas supply main pipe and a plurality of gas supply branch pipes, each of which is connected with a gas outlet hole unit; and a switch valve is arranged on each gas supply branch pipe. Each gas outlet hole unit comprises first, second and third aperture gas outlet holes with different aperture sizes, wherein the aperture of the first aperture gas outlet hole is larger than that of the second aperture gas outlet hole, the aperture of the second aperture gas outlet hole is larger than that of the third aperture gas outlet hole, and the second aperture gas outlet hole and the third aperture gas outlet hole are arranged around the first aperture gas outlet hole.

6. The acoustic wave testing apparatus according to claim 4 or 5, wherein The gas release parameter adjustment system comprises: a plurality of different gas source bottles for generating at least one of hydrogen, nitrogen and carbon dioxide gas; A bottle valve is connected to each gas source bottle for controlling the gas component; A pressure reducing valve, a pressure gauge and a pressure gauge valve are used to control the release pressure difference of the adjusting gas; A throttle valve and a flow meter are used to control the release flow of the gas.

7. The acoustic wave testing apparatus according to claim 6, wherein The gas release parameter adjustment system comprises a main pipeline, wherein the pressure reducing valve, the pressure gauge, the pressure gauge valve, the throttle valve and the flow meter are arranged on the main pipeline, and the main pipeline is connected to the gas supply main pipe.

8. The acoustic wave testing device according to claim 1, wherein, The fluid circulation system further comprises temperature sensors and flow rate sensors, wherein the temperature sensors and the flow rate sensors are arranged on the support and in the water flow direction; temperature sensors and flow rate sensors are arranged before and after the end exhaust device; The water tank is provided with a pressure control system at the top for simulating water depth pressure; Reflective film is attached to the periphery of the water tank for enhancing the visibility of the water body; An observation window is arranged on the side of the water tank for observing the test situation; The acoustic wave testing device further comprises: An illumination system, wherein lights are arranged at the top and the bottom of the water tank for illuminating the water body; A frame structure system for installing the hydrophone array and the high-speed camera.

9. An acoustic wave testing method of an underwater device, the acoustic wave testing method being applied to the acoustic wave testing apparatus according to any one of claims 1 to 8, characterized by, The acoustic wave testing method comprises: Simulating an underwater environment and obtaining underwater environment information, wherein the underwater environment information at least comprises flow rate, water temperature and water pressure; Generating different control instructions according to the flow rate, the water temperature and the water pressure, wherein the different control instructions correspond to different control parameters for controlling the gas release parameter adjustment system; Controlling the gas release parameter adjustment system to release gas according to the control parameters, so that the end exhaust device exhausts gas; Obtaining the acoustic wave characteristic information of the gas; Constructing a digital model based on the environment information, the control parameters and the acoustic wave characteristic information corresponding to the control parameters, wherein the digital model is used to obtain the corresponding relationship between the control parameters and the environment information and the acoustic wave characteristic information.

10. A method of gas venting for an underwater apparatus, characterized by, The gas emission method comprises: Receiving control information sent by the underwater equipment and obtaining environment information; Obtaining target acoustic wave characteristic information according to the control information; Generating a control instruction of a control parameter corresponding to the target acoustic wave characteristic according to the digital model, the target acoustic wave characteristic information and the environment information, wherein the control parameter comprises a gas component, a gas release pressure difference and a gas release flow; Controlling the gas emission of the gas emission system of the underwater equipment itself and / or the gas emission of the acoustic wave characteristic decoy system of the underwater equipment according to the control instruction; The digital model is obtained according to the acoustic wave testing method of the underwater equipment of claim 9.

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