A deep water boomer source transducer and method

Abstract

The present application belongs to the technical field of seismic exploration, and relates to a deep-water Boomer seismic source transducer and method. The transducer comprises a base, a transmitting plate, a pressurized cavity and a coil. The base is provided with a groove in which the coil is arranged. The edge of the transmitting plate is fixed to the base. The coil corresponds to the middle part of the transmitting plate. The coil generates an induced current in the transmitting plate after being electrified. The same magnetic field is generated at the close end of the transmitting plate, so that the transmitting plate generates outward radiation. The transmitting plate and the base are sealed, so that the recess of the transmitting plate forms the pressurized cavity. The base is provided with a pressurizing port and a pressure relief port which are in communication with the pressurized cavity. The pressurizing port and the pressure relief port are connected with the external pressurizing pipeline and the pressure relief pipeline respectively. The first pressure sensor is arranged in the pressurized cavity, and the second pressure sensor is arranged outside the base. The present application compensates the dynamic pressure in the aspect of balancing the hydrostatic pressure only, so that the transducer can be effectively excited in the deep water of thousands of meters.

Description

Technical Field

[0001] This invention belongs to the field of seismic exploration technology and relates to a deep-water Boomer source transducer and method. Background Technology

[0002] Under different hydrostatic pressures, underwater acoustic transducers will have different electroacoustic performance. When working in deep water environments thousands of meters deep, the transducer itself is subjected to huge hydrostatic pressure. Therefore, when designing underwater acoustic transducers, it is necessary to consider how to balance the internal and external hydrostatic pressures, otherwise it will cause permanent damage to the transducer.

[0003] Currently, one method for balancing hydrostatic pressure in deep-sea acoustic transducers is by filling them with compressed gas, which utilizes the pressure generated by the compressed gas to balance the hydrostatic pressure. The acoustic characteristics of the underwater acoustic transducer filled with compressed gas will change with the operating depth. The deeper the operating depth, the greater the required compressed gas pressure, the more difficult it is to compress the gas, the greater the mechanical impedance of the transducer, and the higher the voltage applied when the transducer transmits at high power. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes a deep-water Boomer source transducer and method. It incorporates dynamic pressure compensation to address the limitation of existing deep-water transducers that can only balance hydrostatic pressure, enabling the transducer to effectively generate signals in water thousands of meters deep.

[0005] The technical solution of this invention to solve the above problems is: a deep-water Boomer source transducer, characterized in that it includes a base, a transmitting plate, a pressurized cavity, and a coil; the front of the base has a groove, and the coil is disposed in the groove; the transmitting plate has a disc-shaped structure with multiple through holes distributed along its edge and a recess in its center; the edge of the transmitting plate is fixed to the base, and the coil corresponds to the center of the transmitting plate; when the coil is energized, it generates an induced current inside the transmitting plate, and the two near each other generate a magnetic field of the same name, causing the transmitting plate to radiate outwards; the transmitting plate and the base are sealed so that the recess of the transmitting plate forms a pressurized cavity, and the base has a... The pressure chamber is connected to a pressure inlet and a pressure release outlet, which are respectively connected to external pressure and pressure release pipelines. A first pressure sensor is installed inside the pressure chamber to measure the internal pressure, and a second pressure sensor is installed outside the base to measure the external ambient pressure. When the internal pressure of the pressure chamber is greater than the external ambient pressure, the pressure release pipeline opens, and the pressure chamber releases air to achieve pressure relief until the internal pressure of the pressure chamber and the external ambient pressure are balanced. When the internal pressure of the pressure chamber is less than the external ambient pressure, the pressure pipeline opens, and the pressure chamber injects air to achieve pressure increase until the internal pressure of the pressure chamber and the external ambient pressure are balanced.

[0006] Furthermore, the base is provided with studs, which are fixed by passing through through holes on the edge of the launch plate.

[0007] Furthermore, the aforementioned deep-water Boomer source transducer also includes a fastening plate, which is missing in the middle. The missing part corresponds to the middle of the launching plate. The edge of the fastening plate is provided with through holes. The base is provided with studs that pass through the through holes of the launching plate and the fastening plate in sequence, and are then fastened by nuts.

[0008] Furthermore, a pipeline inlet is provided on one side of the aforementioned base, through which the cable enters and connects to the coil.

[0009] Furthermore, the aforementioned pressurization port and pressure relief port extend from the front to the back of the base, respectively.

[0010] Furthermore, the aforementioned pressurization pipeline includes an electric proportional pressure reducing valve K2, an electric high-pressure needle valve K1, and an air pump. The pressurization port is connected to the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1, and the air pump in sequence via a pipeline. The pressure relief pipeline includes an electric high-pressure needle valve K3 and a one-way valve D1. The pressure relief pipeline is connected to the electric high-pressure needle valve K3 and the one-way valve D1 in sequence via a pipeline.

[0011] Furthermore, the aforementioned deep-water Boomer source transducer also includes a controller for acquiring the pressure values ​​measured by the first pressure sensor and the second pressure sensor, and controlling the opening and closing of the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1, the electric high-pressure needle valve K3 and the air pump based on the pressure values.

[0012] Furthermore, a sealing ring is provided between the aforementioned launch plate and the base for sealing.

[0013] In addition, the present invention also proposes an operation method for a deep-water Boomer source transducer, which is characterized by including the following steps.

[0014] Step 1: Before submerging, the internal pressure chamber P2 is 0.1 MPa.

[0015] Step 2: Upon initial entry into the water, the electric proportional pressure reducing valve K2 and the electric high-pressure needle valve K1 are opened via the controller to pressurize the pressure chamber so that the internal pressure P2 is equal to P0, which is 0.5 MPa (p0 is determined by experiments to have good performance when the internal pressure of the launch head is greater than the external pressure by 0.5 MPa). During entry into the water, the internal pressure P2 will remain greater than the real-time external ambient pressure P1 by 0.5 MPa.

[0016] Step 3: The deep-water Boomer source transducer gradually sinks. The controller obtains the internal pressure P2 and external environmental pressure P1 of the pressurized chamber in real time through the first pressure sensor and the second pressure sensor. When P1 is greater than P2, the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 continue to open, so that P2 and P1 maintain a pressure difference of 0.5 MPa until the transducer reaches the maximum working depth.

[0017] Step 4: After the coil is energized by control, an induced current is generated inside the transmitting plate. The two are close to each other and generate a magnetic field of the same name, which causes the transmitting plate to radiate outward. When the radiating surface comes into contact with the water medium, the mechanical energy of the vibration is converted into sound energy and radiated outward, and the transducer works.

[0018] Step 5: When the transducer is finished working and is being recovered, the controller keeps the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 closed, and fully opens the electric high pressure needle valve K3 to discharge the gas inside the pressurized chamber and depressurize. The one-way valve D1 is used to prevent seawater from entering the electric high pressure needle valve K3 during depressurization.

[0019] Advantages of the present invention.

[0020] This invention proposes a deep-sea Boomer source transducer that achieves dynamic pressure compensation of the inner cavity of the transmitter plate to reduce the impact of environmental pressure on the acoustic performance of the transmitter plate, thereby realizing efficient sound generation of the deep-sea Boomer source transducer. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the Boomer source transducer structure provided by the present invention.

[0022] Figure 2 for Figure 1 Different perspectives of the images.

[0023] Figure 3 This is a schematic diagram of the air circuit pressurization and control for the Boomer source transducer.

[0024] Figure 4 The process of pressurizing / depressurizing the Boomer source transducer.

[0025] Figure 5 This is a schematic diagram of the Boomer source transducer proposed in this invention being tested in a self-developed high-pressure anechoic water tank.

[0026] Figure 6 The transducer sound source level under positive pressure conditions.

[0027] Figure 7 The transducer sound source level under isobaric conditions.

[0028] The components are: 1. base, 2. transmitter plate, 3. pressurization chamber, 4. coil, 5. pressurization pipeline, 6. pressure relief pipeline, 7. first pressure sensor, 8. second pressure sensor, 9. stud, 10. fastening plate, 11. pipeline inlet. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0030] See Figures 1-3 This invention proposes a deep-sea Boomer source transducer, comprising a base 1, a transmitting plate 2, a pressurized cavity 3, and a coil 4. The base 1 has a circular groove on its front side, and the coil 4 is disposed within the groove. The transmitting plate 2 has a disc-shaped structure with multiple through holes distributed along its edge and a recess in its center. The edge of the transmitting plate 2 is fixed to the base 1. The coil 4 corresponds to the center of the transmitting plate 2. When the coil 4 is energized, it generates an induced current inside the transmitting plate 2. The two coils, when close together, generate a magnetic field of the same name, causing the transmitting plate 2 to radiate outwards.

[0031] The transmitter plate 2 and the base 1 are sealed together so that the recess of the transmitter plate 2 forms a pressurized cavity 3. A sealing ring is provided between the transmitter plate 2 and the base 1 for sealing. The base 1 is provided with a pressurization port and a pressure relief port that communicate with the pressurized cavity 3. The pressurization port and the pressure relief port are respectively connected to the external pressurization pipeline 5 and the pressure relief pipeline 6. A first pressure sensor 7 is provided inside the pressurized cavity 3 for measuring the internal pressure of the pressurized cavity 3, and a second pressure sensor 8 is provided outside the base 1 for measuring the external environmental pressure.

[0032] When the pressure inside the pressurized chamber 3 measured by the first pressure sensor 7 is greater than the external ambient pressure, the pressure relief pipe 6 is opened, and the pressurized chamber 3 is vented to relieve pressure until the pressure inside the pressurized chamber 3 and the external ambient pressure are balanced; when the pressure inside the pressurized chamber 3 measured by the first pressure sensor 7 is less than the external ambient pressure, the pressurized pipe 5 is opened, and the pressurized chamber 3 is injected with air to pressurize until the pressure inside the pressurized chamber 3 and the external ambient pressure are balanced.

[0033] As a preferred embodiment of the present invention, see [link to previous document]. Figures 1-4Multiple studs 9 are evenly distributed around the edge of the base 1. The studs 9 pass through the through holes on the edge of the launch plate 2 and are fixed by nuts.

[0034] As a preferred embodiment of the present invention, see [link to previous document]. Figure 1 The deep-water Boomer source transducer also includes a fastening plate 10, which is missing in the middle. The missing part corresponds to the middle of the launching plate 2. The edge of the fastening plate 10 is provided with through holes. The base 1 is provided with studs 9 that pass through the through holes of the launching plate 2 and the fastening plate 10 in sequence, and are then fastened by nuts.

[0035] As a preferred embodiment of the present invention, see [link to previous document]. Figure 1 and Figure 2 The base 1 is provided with a pipeline inlet 11 at the top, and the cable enters through the pipeline inlet 11 and is connected to the coil 4.

[0036] In a preferred embodiment of the present invention, the pressure inlet and the pressure relief inlet extend from the front to the back of the base 1, respectively. See also Figure 3 The pressurization pipeline 5 includes an electric proportional pressure reducing valve K2, an electric high-pressure needle valve K1, and an air pump. The pressurization port is connected to the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1, and the air pump in sequence through a pipeline. The pressure relief pipeline 6 includes an electric high-pressure needle valve K3 and a one-way valve D1. The pressure relief pipeline 6 is connected to the electric high-pressure needle valve K3 and the one-way valve D1 in sequence through a pipeline.

[0037] In a preferred embodiment of the present invention, the deep-sea Boomer source transducer further includes a controller for acquiring the pressure values ​​measured by the first pressure sensor 7 and the second pressure sensor 8, and controlling the opening and closing of the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1, the electric high-pressure needle valve K3 and the air pump based on the pressure values: when the internal pressure of the pressurized chamber 3 measured by the first pressure sensor 7 is greater than the external ambient pressure, the pressure relief pipeline 6 is opened, and the pressurized chamber 3 is vented to achieve pressure relief until the internal pressure of the pressurized chamber 3 and the external ambient pressure are balanced; when the internal pressure of the pressurized chamber 3 measured by the first pressure sensor 7 is less than the external ambient pressure, the pressurized pipeline 5 is opened, and the pressurized chamber 3 is injected with air to achieve pressurization until the internal pressure of the pressurized chamber 3 and the external ambient pressure are balanced.

[0038] See Figure 4 and Figure 5 The operation method of the aforementioned deep-water Boomer source transducer includes the following steps.

[0039] Step 1: Before entering the water, the internal pressure chamber 3 has a pressure of 0.1 MPa.

[0040] Step 2: When the device is first submerged in water, the electric proportional pressure reducing valve K2 and the electric high-pressure needle valve K1 are opened by the controller to pressurize the device so that the internal pressure P2 of the pressure chamber is equal to P0, which is 0.5 MPa (p0 is determined by experiments to have good performance when the internal pressure of the launch head is greater than the external pressure by 0.5 MPa). When the device is submerged in water, the internal pressure P2 is kept greater than the real-time external ambient pressure P1 by 0.5 MPa.

[0041] Step 3: The deep-water Boomer source transducer is gradually lowered. The controller obtains the internal pressure P2 and external environmental pressure P1 of the pressurized chamber 3 in real time through the first pressure sensor 7 and the second pressure sensor 8. When P1 is greater than P2, the electric proportional pressure reducing valve K2 and the electric high-pressure needle valve K1 are continuously opened, so that P2 and P1 maintain a pressure difference of 0.5 MPa until the transducer reaches the maximum working depth.

[0042] Step 4: After the coil 4 is energized by control, an induced current is generated inside the transmitting plate 2. The two are close to each other and generate a magnetic field of the same name, which causes the transmitting plate 2 to radiate outward. When the radiating surface comes into contact with the water medium, the mechanical energy of the vibration is converted into sound energy and radiated outward, and the transducer works.

[0043] Step 5: When the transducer is finished working and is being recovered, the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 are kept closed by the controller, and the electric high pressure needle valve K3 is fully opened to discharge the gas inside the pressurized chamber 3 for depressurization. The one-way valve D1 is used to prevent seawater from entering the electric high pressure needle valve K3 during depressurization.

[0044] The deep-water Boomer source transducer proposed in this invention underwent a high-pressure silencing water tank experiment (experimental design as follows). Figure 5 As shown in the figure, the water pressure in the pool gradually increased from 0-12 MPa, and the pressure compensation in the deep-water Boomer source transducer was applied stepwise from 0-12 MPa accordingly. The experimental results are as follows. Figure 6 , 7 As shown, the design of the dynamic pressure compensation balancing hydrostatic pressure of the present invention can effectively excite the Boomer source transducer in the deep sea.

[0045] In summary, the deep-sea Boomer source transducer proposed in this invention achieves dynamic pressure compensation of the inner cavity of the transmitter plate to reduce the impact of environmental pressure on the acoustic performance of the transmitter plate, thus realizing efficient sound generation of the Boomer source transducer in the deep sea.

[0046] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related system fields, are similarly included within the scope of protection of the present invention.

Claims

1. A deep-water Boomer source transducer, characterized in that: It includes a base (1), a transmitter plate (2), a pressurized cavity (3), and a coil (4); The base (1) has a groove on its front side, and the coil (4) is disposed in the groove; The emitting plate (2) has a disc-shaped structure with multiple through holes distributed along its edge and a recess in the middle. The edge of the transmitting plate (2) is fixed on the base (1), and the coil (4) corresponds to the middle of the transmitting plate (2). After the coil (4) is energized, an induced current is generated inside the transmitting plate (2). The two near ends generate the same magnetic field, causing the transmitting plate (2) to radiate outward. The transmitter plate (2) and the base (1) are sealed to form a pressurized cavity (3) in the recess of the transmitter plate (2). The base (1) is provided with a pressurized port and a pressure relief port that communicate with the pressurized cavity (3). The pressurized port and the pressure relief port are respectively connected to the external pressurized pipeline (5) and the pressure relief pipeline (6). The pressurized chamber (3) is provided with a first pressure sensor (7) for measuring the internal pressure of the pressurized chamber (3), and the base (1) is provided with a second pressure sensor (8) for measuring the external environmental pressure. When the internal pressure of the pressurized chamber (3) is greater than the external environmental pressure, the pressure relief pipe (6) is opened, and the pressurized chamber (3) is vented to achieve pressure relief until the internal pressure of the pressurized chamber (3) and the external environmental pressure are balanced; when the internal pressure of the pressurized chamber (3) is less than the external environmental pressure, the pressurized pipe (5) is opened, and the pressurized chamber (3) is injected with air to achieve pressurization until the internal pressure of the pressurized chamber (3) and the external environmental pressure are balanced.

2. The deep-water Boomer source transducer according to claim 1, characterized in that: The base (1) is provided with studs (9), which are fixed by passing through the through holes on the edge of the launch plate (2).

3. The deep-water Boomer source transducer according to claim 2, characterized in that: The deep-water Boomer source transducer also includes a fastening plate (10), which is partially missing. The missing part corresponds to the middle of the launching plate (2). The edge of the fastening plate (10) is provided with a through hole. The base (1) is provided with a stud (9) which passes through the through hole of the launching plate (2) and the fastening plate (10) in sequence, and is then fastened by a nut.

4. The deep-water Boomer source transducer according to claim 1, characterized in that: The base (1) has a pipeline inlet (11) on one side, and the cable enters from the pipeline inlet (11) and is connected to the coil (4).

5. The deep-water Boomer source transducer according to claim 1, characterized in that: The pressurization port and the pressure relief port extend from the front to the back of the base (1), respectively.

6. The deep-water Boomer source transducer according to any one of claims 1-5, characterized in that: The pressurization pipeline (5) includes an electric proportional pressure reducing valve K2, an electric high-pressure needle valve K1 and an air pump. The pressurization port is connected to the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1 and the air pump in sequence through a pipeline. The pressure relief pipeline (6) includes an electric high-pressure needle valve K3 and a one-way valve D1. The pressure relief pipeline (6) is connected to the electric high-pressure needle valve K3 and the one-way valve D1 in sequence through a pipeline.

7. The deep-water Boomer source transducer according to claim 6, characterized in that: The deep-water Boomer source transducer also includes a controller for acquiring the pressure values ​​measured by the first pressure sensor (7) and the second pressure sensor (8), and controlling the opening and closing of the electric proportional pressure reducing valve K2, the electric high-pressure needle valve K1, the electric high-pressure needle valve K3 and the air pump based on the pressure values.

8. A deep-water Boomer source transducer according to any one of claims 1-5, characterized in that: A sealing ring is provided between the launch plate (2) and the base (1) for sealing.

9. An operating method for a deep-water Boomer source transducer based on any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Before immersion, the internal pressure chamber (3) has a pressure of 0.1 MPa. Step 2: When the water is first introduced, the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 are opened by the controller to pressurize the water, so that the internal pressure P2 of the pressure chamber is equal to P0, which is 0.5Mp3. When the water is introduced, the internal pressure P2 is kept greater than the real-time external ambient pressure P1, which is 0.5Mp3. Step 3: The deep-water Boomer source transducer is gradually lowered. The controller obtains the internal pressure P2 and external environmental pressure P1 of the pressurized chamber (3) in real time through the first pressure sensor (7) and the second pressure sensor (8). When P1 is greater than P2, the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 are continuously opened, so that P2 and P1 maintain a pressure difference of 0.5 MP3 until the transducer reaches the maximum working depth. Step 4: After the coil (4) is energized by control, an induced current is generated inside the transmitting plate (2). The two near ends generate the same magnetic field, causing the transmitting plate (2) to radiate outward. When the radiating surface comes into contact with the water medium, the mechanical energy of the vibration is converted into sound energy and radiated outward, and the transducer works. Step 5: When the transducer is finished working and is being recovered, the electric proportional pressure reducing valve K2 and the electric high pressure needle valve K1 are kept closed by the controller, and the electric high pressure needle valve K3 is fully opened to discharge the gas inside the pressurized chamber (3) to release pressure. The one-way valve D1 is used to prevent seawater from entering the electric high pressure needle valve K3 during pressure relief.

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