An ultra-low frequency, high sound source level sound source system suitable for deep water operation and its working method

Abstract

The present invention discloses an ultra-low frequency, high sound source level sound source system suitable for deepwater operations and its operating method. The sound source system includes a motor drive subsystem, a motor control subsystem, a sound radiation subsystem, an aerodynamic balance sound compensation subsystem, a sound and environment measurement subsystem, and a main console and power supply subsystem. The motor drive subsystem is connected to the motor control subsystem and the sound radiation subsystem respectively, the sound radiation subsystem is connected to the aerodynamic balance sound compensation subsystem, the aerodynamic balance sound compensation subsystem is connected to the main console and power supply subsystem, and the main console and power supply subsystem are connected to the sound and environment measurement subsystem and the motor control subsystem respectively. The present invention addresses the current problems of achieving large centimeter-level amplitudes during low-frequency or ultra-low-frequency radiation, as well as the sound compensation difficulties caused by deepwater static pressure.

Description

Technical Field

[0001] The present invention belongs to the technical field of ocean acoustic detection, and in particular relates to an ultra-low frequency, high sound source level sound source system suitable for deep water operation and a working method thereof. Background Art

[0002] With the continuous advancement of ocean understanding and development, the application scope of various equipment and technologies involved in underwater acoustic engineering is continuously expanding, and the requirements for their capabilities are gradually increasing. Specifically, the detection range and operating depth of underwater acoustic equipment are being required to be longer and deeper. The research scope of underwater acoustic engineering has expanded from simple underwater sound waves to the study and application of various sound waves, including interfacial waves coupled with the bottom. Therefore, it is necessary to explore methods to improve technical capabilities by extending the frequency range and placing higher demands on the equipment's adaptability to deepwater environments. To this end, various related research projects are needed. In the field of underwater acoustic engineering applications, the continuous increase in detection distance has led to a continuous search for technological breakthroughs and expansion methods. In water, the propagation laws and characteristics of sound waves are closely related to frequency. The attenuation characteristics of sound waves are inversely proportional to the square of the frequency, that is, the lower the frequency, the slower the sound wave attenuates. Therefore, studying the propagation characteristics of sound waves in the low-frequency and even ultra-low-frequency ranges and exploring application methods have become hot topics and important research topics in underwater acoustic engineering technology. Low-frequency and even very low-frequency sound sources are important equipment and means to carry out these research tasks. Marine equipment capable of withstanding deep-water environments (underwater high pressure) is another important research topic in ocean exploration technology. Therefore, low-frequency and even ultra-low-frequency sound sources that can withstand deep-water environments are important supporting and basic equipment for expanding the research content of underwater acoustic engineering technology.

[0003] As underwater sound-generating devices, underwater sound sources' performance indicators, such as source level, operating frequency, and bandwidth, directly influence the emission and propagation characteristics of sound in water. As previously mentioned, low-frequency sound is more effective at long-distance propagation. Therefore, research on the theory and technical implementation of low-frequency (very low-frequency) sound sources is of great significance to the development of ocean exploration technology.

[0004] Traditional underwater sound sources typically utilize active materials (e.g., piezoelectric and magnetostrictive materials) in conjunction with corresponding sound radiation structures to achieve sound wave radiation, such as various conventional flextensional transducers. These underwater sound sources operate in a resonant mode, with relatively high operating frequencies (several thousand Hz), and can achieve low frequencies of several hundred Hz, but struggle to achieve sound radiation in the lower frequency bands (several Hz to tens of Hz). Given the difficulty of underwater sound sources based on active materials in achieving ultra-low frequency radiation, some researchers have developed low-frequency sound sources using electromagnetic excitation. For example, Zhou Yu of Harbin Engineering University used electromagnetic excitation to develop a low-frequency sound source that can operate at 5 Hz, with a sound source level of up to 160 dB; however, this ultra-low frequency sound source cannot operate in deep water environments. For example, the UW350 low-frequency sound source, driven by rare earth permanent magnets, boasts a sound source level of 165dB and can operate at frequencies as low as 20Hz. This sound source has a maximum operating depth of 188m, but at depths exceeding 100m, its acoustic compensation capability rapidly decreases due to hydrostatic pressure, leading to a sharp drop in sound source level. Research in the field of ultra-low-frequency sound sources is also underway abroad. However, given the sensitive nature of this field, relevant literature typically only reports on the technical specifications achieved by the developed sound source, with specific implementation methods and sound source structures rarely reported.

[0005] The technical bottlenecks of deepwater ultra-low frequency sound sources primarily stem from the challenges of achieving large centimeter-scale amplitudes during low-frequency (or ultra-low-frequency) radiation and the acoustic compensation challenges caused by deep-water static pressure. High sound source levels (in the low-frequency band) require significant displacement of the radiating sound baffle (the radiating surface of a practical sound source cannot be infinitely large), potentially reaching centimeters. This centimeter-scale displacement is difficult to achieve using conventional piezoelectric ceramic materials. Existing open-ended, telescopic airbag compensation technology is unable to suppress transient acoustic backflow at great depths.

[0006] At present, no sound source system has been developed at home and abroad that can work in the ultra-low frequency (such as 5Hz) segment at a water depth of 300 meters. Related key technologies (acoustic backflow compensation technology under high hydrostatic pressure conditions, centimeter-level amplitude realization technology, etc.) are in urgent need of breakthroughs. Summary of the Invention

[0007] The present invention provides an ultra-low frequency, high sound source level sound source system suitable for deep water operation and its working method, which addresses the current problem of achieving centimeter-level large amplitude during low-frequency (or ultra-low frequency) radiation and the difficulty of sound compensation caused by deep water static pressure.

[0008] The present invention is achieved through the following technical solutions:

[0009] A super-low frequency, high sound source level sound source system suitable for deepwater operation, the sound source system comprising a motor drive subsystem, a motor control subsystem, a sound radiation subsystem, a pneumatic balance sound compensation subsystem, a sound and environment measurement subsystem, and a main console and power supply subsystem; the motor drive subsystem is respectively connected to the motor control subsystem and the sound radiation subsystem, the sound radiation subsystem is connected to the pneumatic balance sound compensation subsystem, the pneumatic balance sound compensation subsystem is connected to the main console and power supply subsystem, and the main console and power supply subsystem are respectively connected to the sound and environment measurement subsystem and the motor control subsystem.

[0010] Furthermore, the motor drive subsystem includes a motor controller, a motor and an electric cylinder. The motor controller is connected to the motor, and the motor is connected to the electric cylinder.

[0011] Furthermore, the sound radiation subsystem includes a radiation plate and an elastic and retractable airbag structure, the radiation plate is connected to the electric cylinder of the motor drive subsystem, and the elastic and retractable airbag structure is rigidly connected to the air chamber subsystem of the pneumatic balance sound compensation subsystem.

[0012] Furthermore, the pneumatic balance sound compensation subsystem includes an air chamber subsystem, an air path control subsystem and a gas cylinder gas source, and the air chamber subsystem includes the gas tank of the air chamber subsystem and the structural air chamber of the air chamber subsystem; the air chamber subsystem is connected to the air path control subsystem, and the air path control subsystem is connected to the gas cylinder gas source.

[0013] Furthermore, a gas tank 2 of the air chamber subsystem is installed at the bottom end of the support frame 1, and an air path control subsystem 3 is respectively arranged on the left and right outer sides of the upper end of the gas tank 2 of the air chamber subsystem. Each of the gas path control subsystems 3 is connected to a gas cylinder 4. The gas tank 2 of the air chamber subsystem is connected to the structural air chamber 5 of the air chamber subsystem through a sealed pipeline 20. A motor 6 is installed at the bottom end of the structural air chamber 5 of the air chamber subsystem. The motor 6 is connected to the motor controller 7. The motor 6 provides kinetic energy for the electric cylinder 8. The output shaft of the electric cylinder 8 is connected to the radiation plate III9, and the radiation plate III9 is connected to the elastic and retractable airbag structure I10. The elastic and retractable airbag structure I10 is connected to the structural air chamber 5 of the air chamber subsystem through a flange 11. A pressure sensor 12 is installed in the structural air chamber 5 of the air chamber subsystem. On the outside of the support frame 1, an arm 13-1 is installed on the upper end of the radiation plate III9. The length of the arm 13-1 is greater than 1 meter, and a sound pressure sensor 13 is installed at the end point of the arm 13-1.

[0014] Furthermore, the bottom end of the support frame 1 is installed with a gas tank 2 of the air chamber subsystem, and the left and right sides of the upper end of the gas tank 2 of the air chamber subsystem are respectively installed with an air path control subsystem 3, each of the air path control subsystems 3 is connected to a gas cylinder 4, and the gas tank 2 of the air chamber subsystem is connected to the structural air chamber 5 of the air chamber subsystem through a sealed pipeline 20. The bottom end of the structural air chamber 5 of the air chamber subsystem is installed with a motor 6, and the motor 6 is connected to the motor controller 7. The motor 6 provides kinetic energy for the electric cylinder 8. The output shaft of the electric cylinder 8 is connected to the reversing structure 15, and the reversing structure 15 is respectively connected to the radiation plate I 16 and the radiation plate II 17. The radiation plate I 16 is connected to the flexible and retractable airbag structure I 18, and the flexible and retractable airbag structure I 18 is connected to the structural air chamber 5 of the air chamber subsystem through a flange 11.

[0015] The radiation plate II 17 is connected to the elastic and telescopic airbag structure II 19, and the elastic and telescopic airbag structure II 19 is sealed to the structural air chamber 5 of the air chamber subsystem via a flange 11.

[0016] On the outside of the support frame 1 , a span arm 13 - 1 is installed on the right or left side of the radiation plate I 16 or the radiation plate II 17 . The span arm 13 - 1 is longer than 1 meter, and a sound pressure sensor 13 is installed at the end point of the span arm 13 - 1 .

[0017] A method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation, the method comprising the following steps:

[0018] Step 1: Under the control of the air circuit control system, the air pressure in the air chamber is controlled according to the diving depth of the sound source to balance it with the water environment pressure;

[0019] Step 2: After reaching the working depth, under the control of the motor control system, the motor drive shaft makes a circular rotation and the electric cylinder converts the circular rotation of the motor drive shaft into linear motion of the push rod;

[0020] Step 3: Based on the linear motion of the push rod in step 2, the push rod pushes the piston of the radiation plate to reciprocate to achieve centimeter-level displacement amplitude; the sound wave radiation in the water medium is realized, and the sound and environment measurement subsystem opens the expansion arm through control operation, and then performs sound field measurement;

[0021] Step 4: Recover the sound source.

[0022] Furthermore, the step 1 is specifically that the main console controls the diving stage according to the measurement results of the pressure sensor of the sound and environment measurement subsystem, and at the same time the air path control subsystem performs the on-off operation of the air path. According to the preset step-by-step diving rules, the internal pressure of the sound source is gradually increased in stages to balance it with the external hydrostatic pressure, ensuring that the entire sound source structure is not crushed during the diving process.

[0023] Furthermore, steps 2 and 3 are specifically as follows: after confirming that the sound source position and status are normal based on the detection results of the sound and environment measurement subsystem, the sound source working stage is entered; the motor control subsystem is started through the main console to control the motor output linear motion to push the radiation plate to reciprocate; the output of the motor is controlled by adjusting the parameters through the main console to control the vibration amplitude and frequency of the radiation plate to meet the sound level and frequency requirements; during the sound source working process, the sound and environment measurement subsystem will feed back the sound field and environmental parameters to the main console in real time to achieve closed-loop control.

[0024] Furthermore, step 4 is specifically as follows: during the recovery process, the boom is first recovered. As the depth decreases, the internal pressure of the sound source is greater than the external hydrostatic pressure, and the pressure inside the sound source is unloaded through the pressure relief valve; the pressure relief valve is a one-way check valve with a plug, and a certain threshold is set; the plug of the pressure relief valve is in a closed state during the diving stage and the sound source working stage, and is only opened during the sound source recovery stage; the sound source recovery process also needs to cooperate with the sound and environment measurement subsystem to gradually unload the internal pressure of the sound source.

[0025] The beneficial effects of the present invention are:

[0026] The present invention proposes an ultra-low frequency, high sound source level electric sound source system technology and implementation method that can operate at a water depth of 300 meters.

[0027] Different from traditional underwater sound sources made of active materials, the sound source proposed in the present invention uses a motor as an excitation source to achieve centimeter-level radiation displacement; it utilizes the liquid-gas phase conversion process of gas to achieve dynamic pressure balance and acoustic backflow compensation technology to effectively achieve acoustic backflow compensation.

[0028] The present invention can achieve underwater sound pressure radiation in an ultra-low frequency band (as low as 5 Hz) and a high sound source level of 160 dB.

[0029] The present invention carries out an overall scheme design for the sound source system and formulates the operating process rules for its step-by-step diving, acoustic backflow compensation closed-loop control, and step-by-step recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the composition of the present invention.

[0031] Figure 2 Schematic diagram of the structure of the present invention when the arm is folded, wherein (a) is a schematic diagram of the single radiation plate structure when the arm is folded, and (b) is a schematic diagram of the double radiation structure when the arm is folded.

[0032] Figure 3 Schematic diagram of the structure of the arm of the present invention when it is unfolded, wherein (a) is a schematic diagram of the single radiation plate structure when the arm is unfolded, and (b) is a schematic diagram of the double radiation structure when the arm is unfolded. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] Applicable in water depth of 300 meters.

[0035] A low-frequency, high-source-level sound source system suitable for deepwater operations. The sound source system includes a motor drive subsystem, a motor control subsystem, a sound radiation subsystem, a pneumatic balance and sound compensation subsystem, a sound and environmental measurement subsystem, and a main console and power supply subsystem. The motor drive subsystem is connected to the motor control subsystem and the sound radiation subsystem, respectively; the sound radiation subsystem is connected to the pneumatic balance and sound compensation subsystem, which in turn is connected to the main console and power supply subsystem. The main console and power supply subsystem are connected to the sound and environmental measurement subsystem and the motor control subsystem, respectively. The gas cylinder contains carbon dioxide gas.

[0036] Furthermore, the motor drive subsystem includes a motor controller, a motor and an electric cylinder. The motor controller is connected to the motor, and the motor is connected to the electric cylinder.

[0037] Furthermore, the sound radiation subsystem includes a radiation plate and an elastically retractable airbag structure. The radiation plate is connected to the electric cylinder of the motor drive subsystem, and the elastically retractable airbag structure is rigidly connected to the air chamber subsystem of the pneumatic balance sound compensation subsystem. The flexible and retractable airbag structure includes, but is not limited to, an elastic structure airbag.

[0038] Furthermore, the pneumatic balance sound compensation subsystem includes an air chamber subsystem, an air path control subsystem and a gas cylinder gas source, and the air chamber subsystem includes the gas tank of the air chamber subsystem and the structural air chamber of the air chamber subsystem; the air chamber subsystem is connected to the air path control subsystem, and the air path control subsystem is connected to the gas cylinder gas source.

[0039] Furthermore, a gas tank 2 of the air chamber subsystem is installed at the bottom end of the support frame 1, and an air path control subsystem 3 is respectively arranged on the left and right outer sides of the upper end of the gas tank 2 of the air chamber subsystem. Each of the gas path control subsystems 3 is connected to a gas cylinder 4. The gas tank 2 of the air chamber subsystem is connected to the structural air chamber 5 of the air chamber subsystem through a sealed pipeline 20. A motor 6 is installed at the bottom end of the structural air chamber 5 of the air chamber subsystem. The motor 6 is connected to the motor controller 7. The motor 6 provides kinetic energy for the electric cylinder 8. The output shaft of the electric cylinder 8 is connected to the radiation plate III9, and the radiation plate III9 is connected to the elastic and retractable airbag structure I10. The elastic and retractable airbag structure I10 is connected to the structural air chamber 5 of the air chamber subsystem through a flange 11. A pressure sensor 12 is installed in the structural air chamber 5 of the air chamber subsystem. On the outside of the support frame 1, an arm 13-1 is installed on the upper end of the radiation plate III9. The length of the arm 13-1 is greater than 1 meter, and a sound pressure sensor 13 is installed at the end point of the arm 13-1. When the working depth is reached, the arm is opened by control, and the opening and closing angle is designed so that the sound pressure sensor is located on the extension line of the central axis of the radiation plate.

[0040] Furthermore, the bottom end of the support frame 1 is installed with a gas tank 2 of the air chamber subsystem, and the left and right sides of the upper end of the gas tank 2 of the air chamber subsystem are respectively installed with an air path control subsystem 3, each of the air path control subsystems 3 is connected to a gas cylinder 4, and the gas tank 2 of the air chamber subsystem is connected to the structural air chamber 5 of the air chamber subsystem through a sealed pipeline 20. The bottom end of the structural air chamber 5 of the air chamber subsystem is installed with a motor 6, and the motor 6 is connected to the motor controller 7. The motor 6 provides kinetic energy for the electric cylinder 8. The output shaft of the electric cylinder 8 is connected to the reversing structure 15, and the reversing structure 15 is respectively connected to the radiation plate I 16 and the radiation plate II 17. The radiation plate I 16 is connected to the flexible and retractable airbag structure I 18, and the flexible and retractable airbag structure I 18 is connected to the structural air chamber 5 of the air chamber subsystem through a flange 11.

[0041] The radiation plate II 17 is connected to the elastic and telescopic airbag structure II 19, and the elastic and telescopic airbag structure II 19 is sealed to the structural air chamber 5 of the air chamber subsystem via a flange 11.

[0042] An arm 13-1 is mounted on the outside of the support frame 1, on the right or left side of radiant panel I16 or II17. Arm 13-1 is greater than one meter long, and a sound pressure sensor 13 is mounted at its endpoint. When the operating depth is reached, the arm is controlled to open, and the opening and closing angle is designed so that the sound pressure sensor is located on an extension of the central axis of the radiant panel.

[0043] A method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation, the method comprising the following steps:

[0044] Step 1: Under the control of the air circuit control system, the air pressure in the air chamber is controlled according to the diving depth of the sound source to balance it with the water environment pressure;

[0045] Step 2: After reaching the working depth, under the control of the motor control system, the motor drive shaft makes a circular rotation and the electric cylinder (circular-linear motion mechanical conversion mechanism) converts the circular rotation of the motor drive shaft into linear motion of the push rod;

[0046] Step 3: Based on the linear motion of the push rod in step 2, the push rod pushes the piston of the radiation plate to perform reciprocating motion (single and double radiation plates) to achieve centimeter-level displacement amplitude; the sound wave radiation in the water medium is realized, and the sound and environment measurement subsystem opens the expansion arm through control operation, and then performs sound field measurement;

[0047] Step 4: Recover the sound source.

[0048] Furthermore, step 1 is specifically as follows: the low-frequency sound source works 300m underwater. During the deployment of the sound source, the internal pressure of the sound source and the external hydrostatic pressure should be kept in a stage balance principle (or the pressure difference should be controlled within an acceptable range); accordingly, the present invention adopts a 50-meter stepped diving sound source deployment method, by dividing the 300m depth into grades (such as 50m intervals), and gradually diving; the main console controls the diving stage according to the measurement results of the pressure sensor of the sound and environment measurement subsystem, and at the same time the air path control subsystem performs the on-off operation of the air path, and according to the preset stepped diving rules, the internal pressure of the sound source is gradually increased in grades to balance it with the external hydrostatic pressure, to ensure that the entire sound source structure is not crushed during the diving process.

[0049] Furthermore, steps 2 and 3 are specifically as follows: after confirming that the position and status of the sound source are normal based on the detection results of the sound and environment measurement subsystem, the sound source working stage is entered; the motor control subsystem is started through the main console to control the motor output linear motion (the dual radiation plate structure needs to pass through the commutation structure to convert the linear motion of the motor into the motion of the dual radiation plate), and push the radiation plate to perform reciprocating motion; the output of the motor is controlled by adjusting the parameters through the main console to control the vibration amplitude and frequency of the radiation plate to meet the sound level and frequency requirements; during the sound source working process, the sound and environment measurement subsystem will feed back the sound field and environmental parameters to the main console in real time to achieve closed-loop control.

[0050] Furthermore, step 4 is specifically as follows: during the recovery process, the boom is first recovered. As the depth decreases, the internal pressure of the sound source is greater than the external hydrostatic pressure, and the pressure inside the sound source is unloaded through the pressure relief valve; the pressure relief valve is a one-way check valve with a plug, and a certain threshold is set; the plug of the pressure relief valve is in a closed state during the diving stage and the sound source working stage, and is only opened during the sound source recovery stage; the sound source recovery process also needs to cooperate with the sound and environment measurement subsystem to gradually unload the internal pressure of the sound source.

[0051] Example 2

[0052] like Figure 1 As shown, the ultra-low-frequency, high-source-level electric sound source system proposed by the present invention, which can operate at a water depth of 300 meters, mainly includes: a motor drive subsystem, a motor control subsystem, a sound radiation subsystem, a pneumatic balance and sound compensation subsystem, a sound and environmental measurement subsystem, a main console and power supply subsystem, and a support frame mounting structure. The overall dimensions of the entire sound source system are constrained to a volume of 1 meter in diameter and 1.5 meters in height. The motor drive subsystem includes a motor, an electric cylinder, and a controller; the pneumatic balance and sound compensation subsystem mainly consists of a gas-to-liquid-phase conversion and gas path control subsystem, a pressure balance control and sound compensation chamber (or gas tank) subsystem (including a flange interface for sealing connection with the sound radiation system), a gas cylinder source, and cables. The sound radiation subsystem includes a radiation plate and an elastic structure airbag. The sound and environmental measurement subsystem includes a sound pressure sensor, a depth sensor, and a pressure sensor. The pressure sensors in the motor drive subsystem and the sound and environmental measurement subsystem are both placed in the pressure balance control and sound compensation chamber (or gas tank). The support frame installation structure provides installation support for the entire sound source system.

[0053] Mechanical connection relationship: The electric cylinder of the motor drive subsystem is connected to the radiation plate of the sound radiation subsystem; the elastic structure airbag of the sound radiation subsystem and the flange of the air chamber (gas tank) subsystem that provides pressure balance control and sound compensation are rigidly connected, and the motor drive subsystem can be placed in the pressure balance control and sound compensation air chamber (or gas tank) subsystem; the pressure balance control and sound compensation air chamber (gas tank) subsystem adopts a watertight and pressure-resistant sealing structure, and is connected to the high-pressure gas cylinder through the air path control subsystem, and the high-pressure gas cylinder serves as the gas source for compressible gas.

[0054] Electrical connection relationship: The main console and power supply system provide power to all subsystems. The main console controls the motor drive system through the motor control subsystem; the main console is electrically connected to the gas circuit control subsystem to control the gas circuit operation according to the working conditions; the main console is electrically connected to the sound and environment measurement system to provide sensor test data and provide control basis for the control system.

[0055] Figure 2The figure shows the overall structural scheme of the ultra-low frequency, high sound source level electric sound source system of the present invention that can work at a water depth of 300 meters. Figure 2 As shown, the ultra-low frequency sound source of the present invention adopts a single radiation plate structure. The radiation plate is made of a plate with a diameter of 500mm and a thickness of 20mm. The output end of the servo motor is directly rigidly connected to the radiation plate. Figure 2 As shown in a; a double radiation plate structure can also be used to convert the linear displacement output by the motor into double-sided radiation displacement through the commutation structure. The two radiation plates are made of metal or non-metal materials with a diameter of 300mm and a thickness of 20mm, and are symmetrically arranged on both sides of the head of the low-frequency sound source. Figure 2 As shown in Figure b, the two radiating plates are connected to the output of the servo motor through a commutation structure, and driven by the motor, they achieve the same frequency (about 5-20Hz), equal amplitude, and anti-phase vibration.

Claims

1. An ultra-low frequency, high sound source level sound source system suitable for deep water operation, characterized in that: The sound source system includes a motor drive subsystem, a motor control subsystem, a sound radiation subsystem, a pneumatic balance sound compensation subsystem, a sound and environment measurement subsystem, and a main console and power supply subsystem; the motor drive subsystem is respectively connected to the motor control subsystem and the sound radiation subsystem, the sound radiation subsystem is connected to the pneumatic balance sound compensation subsystem, the pneumatic balance sound compensation subsystem is connected to the main console and power supply subsystem, and the main console and power supply subsystem are respectively connected to the sound and environment measurement subsystem and the motor control subsystem.

2. The ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 1, characterized in that: The motor drive subsystem includes a motor controller, a motor and an electric cylinder. The motor controller is connected to the motor, and the motor is connected to the electric cylinder.

3. The ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 1, characterized in that: The sound radiation subsystem includes a radiation plate and an elastic and retractable airbag structure. The radiation plate is connected to the electric cylinder of the motor drive subsystem. The elastic and retractable airbag structure is rigidly connected to the air chamber subsystem of the pneumatic balance sound compensation subsystem.

4. The ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 1, characterized in that: The pneumatic balance sound compensation subsystem includes an air chamber subsystem, an air path control subsystem and a gas cylinder gas source. The air chamber subsystem includes an air tank of the air chamber subsystem and a structural air chamber of the air chamber subsystem; the air chamber subsystem is connected to the air path control subsystem, and the air path control subsystem is connected to the gas cylinder gas source.

5. An ultra-low frequency, high sound source level sound source system suitable for deep water operation according to any one of claims 1 to 4, characterized in that: The bottom end of the support frame (1) is equipped with a gas tank (2) of the gas chamber subsystem. The gas path control subsystems (3) are respectively arranged on the left and right outer sides of the upper end of the gas tank (2) of the gas chamber subsystem. Each gas path control subsystem (3) is connected to a gas cylinder (4). The gas tank (2) of the gas chamber subsystem is connected to the structural gas chamber (5) of the gas chamber subsystem via a sealed pipeline (20). The bottom end of the structural gas chamber (5) of the gas chamber subsystem is equipped with a motor (6). The motor (6) is connected to a motor controller (7). The motor (6) provides kinetic energy for the electric cylinder (8). The output shaft of the electric cylinder (8) is connected to the radiation plate III (9), the radiation plate III (9) is connected to the elastic and retractable airbag structure I (10), the elastic and retractable airbag structure I (10) is connected to the structural air chamber (5) of the air chamber subsystem through a flange (11), a pressure sensor (12) is installed in the structural air chamber (5) of the air chamber subsystem, and an arm (13-1) is installed at the upper end of the radiation plate III (9) on the outside of the support frame (1), the arm (13-1) is longer than 1 meter, and a sound pressure sensor (13) is installed at the end of the arm (13-1).

6. An ultra-low frequency, high sound source level sound source system suitable for deep water operation according to any one of claims 1 to 4, characterized in that: The bottom end of the support frame (1) is equipped with a gas tank (2) of the gas chamber subsystem. The gas path control subsystems (3) are respectively equipped on the left and right sides of the upper end of the gas tank (2) of the gas chamber subsystem. Each gas path control subsystem (3) is connected to a gas cylinder (4). The gas tank (2) of the gas chamber subsystem is connected to the structural gas chamber (5) of the gas chamber subsystem via a sealed pipeline (20). The bottom end of the structural gas chamber (5) of the gas chamber subsystem is equipped with a motor (6). The motor ( 6) is connected to the motor controller (7), the motor (6) provides kinetic energy for the electric cylinder (8), the output shaft of the electric cylinder (8) is connected to the reversing structure (15), the reversing structure (15) is respectively connected to the radiation plate I (16) and the radiation plate II (17), the radiation plate I (16) is connected to the flexible and retractable airbag structure I (18), the flexible and retractable airbag structure I (18) is connected to the structural air chamber (5) of the air chamber subsystem through the flange (11), The radiation plate II (17) is connected to the elastic and telescopic airbag structure II (19), and the elastic and telescopic airbag structure II (19) is sealed to the structural air chamber (5) of the air chamber subsystem via a flange (11). An arm (13-1) is installed on the outside of the support frame (1) at the right or left end of the radiation plate I (16) or the radiation plate II (17). The arm (13-1) is longer than 1 meter, and a sound pressure sensor (13) is installed at the end point of the arm (13-1).

7. The method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 1, characterized in that: The working method comprises the following steps: Step 1: Under the control of the air circuit control system, the air pressure in the air chamber is controlled according to the diving depth of the sound source to balance it with the water environment pressure; Step 2: After reaching the working depth, under the control of the motor control system, the motor drive shaft makes a circular rotation and the electric cylinder converts the circular rotation of the motor drive shaft into linear motion of the push rod; Step 3: Based on the linear motion of the push rod in step 2, the push rod pushes the piston of the radiation plate to reciprocate to achieve centimeter-level displacement amplitude; the sound wave radiation in the water medium is realized, and the sound and environment measurement subsystem opens the expansion arm through control operation, and then performs sound field measurement; Step 4: Recover the sound source.

8. The method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 7, characterized in that: Specifically, step 1 is as follows: the main console controls the diving stage according to the measurement results of the pressure sensor of the sound and environment measurement subsystem, and at the same time the air path control subsystem performs the on-off operation of the air path. According to the preset step-by-step diving rules, the internal pressure of the sound source is gradually increased in stages to balance it with the external hydrostatic pressure, ensuring that the entire sound source structure is not crushed during the diving process.

9. The method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 7, characterized in that: Specifically, steps 2 and 3 are as follows: after confirming that the sound source position and status are normal based on the detection results of the sound and environment measurement subsystem, the sound source working stage is entered; the motor control subsystem is started through the main console to control the motor output linear motion to push the radiation plate to reciprocate; the output of the motor is controlled by adjusting the parameters through the main console to control the vibration amplitude and frequency of the radiation plate to meet the sound level and frequency requirements; during the sound source working process, the sound and environment measurement subsystem will feed back the sound field and environmental parameters to the main console in real time to achieve closed-loop control.

10. The method for operating an ultra-low frequency, high sound source level sound source system suitable for deep water operation according to claim 7, characterized in that: Specifically, step 4 is as follows: during the recovery process, the boom is first recovered. As the depth decreases, the internal pressure of the sound source is greater than the external hydrostatic pressure, and the pressure inside the sound source is unloaded through the pressure relief valve; the pressure relief valve is a one-way check valve with a plug, and a certain threshold is set; the plug of the pressure relief valve is in a closed state during the diving stage and the sound source working stage, and is only opened during the sound source recovery stage; the sound source recovery process also needs to cooperate with the sound and environment measurement subsystem to gradually unload the internal pressure of the sound source.

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