Underwater Drag Adjustment Assembly, Towed Array and Detection Equipment

Abstract

The present application relates to an underwater drag adjustment assembly, a towed line array, and a detection device. The underwater drag adjustment assembly includes a housing portion, an adjustment wing, and a driving portion. The housing portion includes a receiving cavity and a first end and a second end that are axially opposed; the adjustment wing includes a free end and a pivot end; the pivot end is disposed at the second end so that the adjustment wing is pivotally connected to the housing portion; the driving portion is disposed in the receiving cavity; the driving portion is connected to the adjustment wing to drive the adjustment wing to rotate around the pivot end and change the distance between the free end and the housing portion; the adjustment wing includes a working state and a retracted state: when in the working state, the free end is away from the housing portion; when in the retracted state, the free end is close to the housing portion and is closer to the first end than the pivot end.

Description

Technical Field

[0001] The present application relates to the field of underwater detection equipment, and particularly to an underwater drag adjustment assembly, a towed line array, and a detection device. Background Art

[0002] Currently, countries around the world are vigorously developing underwater detection equipment. Underwater detection equipment can be used to detect moving objects, such as organisms and human activities, and thus can be widely applied to scientific research and rescue activities. The underwater detection equipment is connected with a towed line array. A plurality of detection elements are arranged on the towed line array for detecting sound waves generated by water flow, so as to perform target detection.

[0003] Most of the currently designed towed line arrays belong to thin wire arrays. During the deployment process of the towed line array, due to the relatively thin diameter of the array line, it may be difficult to generate a large enough flow resistance to pull the subsequent towed line array after entering the water, thus affecting the entire deployment speed.

[0004] After the towed line array is completely in the water, too small a pulling force on the towed line array will also cause an unstable wake of the towed line array, and then the situation of tail swing will occur, generating towed vibration noise during towing. This large-scale flow noise is one of the main reasons affecting the underwater detection performance of the towed line array and must be suppressed.

[0005] In addition, the large number of detection elements will also greatly increase the length of the towed line array. When a towed line array hundreds of meters long is towed underwater, if the towed line array is distorted, it will affect beam formation and even make it impossible to detect the target. Summary of the Invention

[0006] The present application provides an underwater drag adjustment assembly, a towed line array, and a detection device to solve some or all of the deficiencies in the related art.

[0007] In the first aspect of the present application, an underwater drag adjustment assembly is provided, including:

[0008] A housing part, including a receiving cavity and a first end and a second end oppositely arranged along the axis;

[0009] An adjusting wing, including a free end and a pivoting end; the pivoting end is arranged at the second end so that the adjusting wing is pivotally connected to the housing part; and,

[0010] A driving part, arranged in the receiving cavity; the driving part is connected to the adjusting wing to drive the adjusting wing to rotate around the pivoting end and change the distance between the free end and the housing part;

[0011] The adjusting wing includes a working state and a retracted state:

[0012] When in the working state, the free end is away from the housing part;

[0013] When in the retracted state, the free end is close to the housing part and closer to the first end compared with the pivot end.

[0014] Further, the driving part includes a linear motor moving along the axial direction and a connecting rod; one end of the connecting rod is pivotally connected to the linear motor, and the other end is pivotally connected to a position of the adjusting wing close to the pivot end; wherein, the pivotal position of the connecting rod and the adjusting wing is closer to the free end compared with the pivotal position of the adjusting wing and the housing part.

[0015] Further, the linear motor includes a motor body and a driving rod; the housing part includes an avoidance groove; the connecting rod connects the driving rod and the connecting rod through the avoidance groove;

[0016] Wherein, the housing part includes a sealing member arranged in the accommodating cavity; the sealing member divides the accommodating cavity into a sealing cavity and a driving cavity distributed along the axial direction; the motor body is arranged in the sealing cavity; the driving rod is arranged in the driving cavity and electrically connected to the motor body through the sealing member; the avoidance groove is communicated with the driving cavity.

[0017] Further, the adjusting wing includes a connecting plate arranged at the pivot end; the connecting plate is arranged on one side of the adjusting wing facing the housing and extends towards the housing part; the connecting rod and the housing part are respectively pivotally connected to the connecting plate;

[0018] When the adjusting wing is in the retracted state, the connecting plate is accommodated in the avoidance groove.

[0019] Further, the number of the adjusting wings includes a plurality; the number of the driving parts corresponds to the number of the adjusting wings one by one, so that the plurality of adjusting wings can be in different states.

[0020] Further, the adjusting wing is arranged in an arc shape; when the adjusting wing is in the retracted state, the free end and the pivot end of the adjusting wing are closer to the housing part compared with the middle position.

[0021] Further, in the direction from the first end to the second end, the outer peripheral dimension of at least part of the housing part becomes larger; a protrusion is arranged on one side of the free end of the adjusting wing facing the housing part; when the adjusting wing is in the retracted state, the protrusion is attached to the housing part.

[0022] Further, in the direction from the free end to the pivot end, the width of the adjusting wing first increases and then decreases.

[0023] The second aspect of the present application provides a towed line array, which includes a cable, a detection element, and the underwater resistance adjustment component described in the foregoing embodiment; the cable includes an interface end and a terminal end arranged oppositely; the detection element is arranged between the interface end and the terminal end and is electrically connected to the cable; the terminal end is connected to the first end so that the cable provides electrical energy to the driving part.

[0024] The third aspect of the present application provides a detection device, which includes a power source and the towed line array described in the foregoing embodiment; the interface end is electrically connected to the power source.

[0025] The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

[0026] As can be seen from the above embodiments, the underwater resistance adjustment component involved in the present application has a simple structure, a wide range of applications, and at the same time is small in size and convenient for storage. When assembled in the towed line array, the underwater resistance adjustment component can increase the flow resistance and weaken the swing amplitude of the terminal end. When the formation of the towed line array is distorted, the underwater resistance adjustment component can actively adjust the formation attitude by controlling the opening and closing of the adjustment wing, quickly restore the straight formation, and improve the detection accuracy of the towed line array.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It shows an overall schematic diagram of an embodiment of the underwater resistance adjustment component of the present application, where the underwater resistance adjustment component is in a retracted state;

[0030] Figure 2 It shows an overall schematic diagram of another embodiment of the underwater resistance adjustment component of the present application, where the underwater resistance adjustment component is in a working state;

[0031] Figure 3 It shows a simplified schematic diagram of an embodiment of the towed line array of the present application;

[0032] Figure 4 It shows as Figure 1 A side schematic diagram of the shown embodiment, where the underwater resistance adjustment component is in a working state;

[0033] Figure 5 Shown as Figure 4 A schematic cross-sectional view of the cross-section A-A shown;

[0034] Figure 6 Shown is an overall schematic view of an embodiment of the second housing of the underwater drag adjustment assembly of the present application;

[0035] Figure 7 Shown is an overall schematic view of an embodiment of the linear motor of the underwater drag adjustment assembly of the present application;

[0036] Figure 8 Shown is an overall schematic view of an embodiment of the adjustment wing of the underwater drag adjustment assembly of the present application;

[0037] Figure 9 Shown is an overall schematic view of an embodiment of the connecting seat of the underwater drag adjustment assembly of the present application;

[0038] Figure 10 Shown is an overall schematic view of an embodiment of the connecting rod of the underwater drag adjustment assembly of the present application.

[0039] Description of reference numerals:

[0040] 100 Underwater drag adjustment assembly, 1 Housing part, 11 Accommodation cavity, 111 Sealing cavity, 112 Driving cavity, 12 First end, 13 Second end, 14 Avoidance groove, 15 Sealing member, 16 First housing, 17 Second housing, 171 Flow-through structure, 172 First assembly hole, 173 Hoisting ring assembly hole, 18 Transition protection part, 19 Cable socket, 2 Adjustment wing, 21 Free end, 22 Pivoting end, 23 Connecting plate, 24 Protrusion, 25 Housing pivoting hole, 26 Connecting rod pivoting hole, 3 Driving part, 31 Linear motor, 311 Motor body, 312 Driving rod, 32 Connecting rod, 321 Body part, 322 Extension part, 323 Connecting hole, 324 Accommodating space, 4 Hoisting ring, 5 Connecting seat, 51 Base, 52 Second assembly hole, 53 Protruding part, 54 Clamping space, 55 Wing plate connecting hole, 200 Towed line array, 210 Cable, 211 Interface end, 212 End, 220 Detection element, Z axis direction. Detailed implementation manners

[0041] Here, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements.

[0042] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and motion conditions between components in a specific posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be construed as indicating or implying relative importance.

[0043] Reference Figures 1 to 5 , the present application provides an underwater drag adjustment assembly 100. The underwater drag adjustment assembly 100 includes a housing part 1, an adjustment wing 2, and a driving part 3. The housing part 1 includes a receiving cavity 11 and a first end 12 and a second end 13 that are oppositely arranged along the axial direction Z. The adjustment wing 2 includes a free end 21 and a pivoting end 22. The pivoting end 22 is arranged at the second end 13 so that the adjustment wing 2 is pivotally connected to the housing part 1. The driving part 3 is arranged in the receiving cavity 11. The driving part 3 is connected to the adjustment wing 2 to drive the adjustment wing 2 to rotate around the pivoting end 22 and change the distance between the free end 21 and the housing part 1. Among them, the adjustment wing 2 includes a working state and a retracted state:

[0044] As Figure 1 shown, when the adjustment wing 2 is in the retracted state, the free end 21 is close to the housing part 1 and is closer to the first end 12 compared to the pivoting end 22; as Figure 2 shown, when the adjustment wing 2 is in the working state, the free end 21 is far from the housing part 1.

[0045] The underwater drag adjustment assembly 100 is connected to a cable 210 and a detection element 220 to form a towed line array 200 of the present application. The cable 210 can be an armored cable to improve the overall strength of the cable 210. The cable 210 includes an interface end 211 and a terminal end 212 that are oppositely arranged. The detection element 220 is arranged between the interface end 211 and the terminal end 212 and is electrically connected to the cable 210. The terminal end 212 is connected to the first end 12 so that the cable 210 provides electrical energy to the driving part 3. When the towed line array 200 is assembled to a detection device, the interface end 211 is connected to the power supply of the detection device, thereby realizing the overall power-on of the towed line array 200.

[0046] When the adjusting fin 2 is in the retracted state, the underwater resistance adjusting assembly 100 as a whole is more compact, facilitating storage. At the same time, it can also prevent the deployed adjusting fin 2 from being damaged by external forces during storage. When the towed array 200 starts to be deployed on the water surface, the underwater resistance adjusting assembly 100 in the retracted state is first put into the water. Subsequently, the adjusting fin 2 is controlled to switch to the working state. At this time, since there is an angle between the adjusting fin 2 and the axial direction Z, the resistance of the underwater resistance adjusting assembly 100 underwater can be increased (the water flow direction is as shown by the Figure 3 blue arrow), thereby providing the pulling force required for the towed array 200 to enter the water and realizing the efficient deployment of the towed array 200.

[0047] After the entire towed array 200 has entered the water, the resistance generated by the adjusting fin 2 in the working state underwater can also reduce the swing of the end 212 of the cable 210. During the driving process of the detection device, the towed array 200 maintains an almost straight posture, optimizing the posture of the towed array 200, thereby reducing the flow noise in a large-scale range, and further improving the detection accuracy of the towed array 200 and the detection device.

[0048] In addition, since the towed array 200 is linearly distributed and the underwater resistance adjusting assembly 100 is arranged at the end 212 of the cable 210, the overall posture adjustment of the towed array 200 can be achieved by one underwater resistance adjusting assembly 100. Compared with the scheme of arranging multiple posture adjusting parts between the interface end 211 and the end 212 of the cable 210, the setting of the underwater resistance adjusting assembly 100 in the present application can effectively reduce the overall cost and weight of the towed array 200, and is also beneficial to using the space of the cable 210 to assemble more detection elements 220, improving the detection accuracy of the towed array 200.

[0049] Figure 3 The number of the shown detection elements 220 should be exemplary rather than restrictive, and the present application does not limit the specific detection function of the detection elements 220. The functions that multiple detection elements 220 can detect can be the same or different. The underwater resistance adjusting assembly 100 of the present application can be used for any number of towed arrays 200 without making adaptive improvements to the number or form of the detection elements 220 of the towed array 200. The detection elements 220 can also be used to detect the posture of the cable, so as to send an adjustment signal to the driving part 3 according to the posture of the cable to control the opening and closing of the adjusting fin 2.

[0050] The driving part 3 can be set to make the adjusting fin 2 have only the retracted state and only the working state, that is, the driving part 3 is only used to drive the adjusting fin 2 to have the smallest angle with the housing part 1 and to drive the adjusting fin 2 to have the largest angle with the housing part 1.

[0051] Optionally, the driving part 3 can also be set to be able to adjust the adjusting wing 2 between the working state and the retracted state, that is, there can be multiple included angles between the adjusting wing 2 and the housing part 1, so that the underwater resistance adjusting assembly 100 can generate different levels of underwater resistance under different water flow speeds and different adjustment conditions.

[0052] The driving part 3 can drive the adjusting wing 2 simultaneously, so that all the adjusting wings 2 are in the retracted state, or all the adjusting wings 2 are in the working state. Optionally, the number of the driving parts 3 corresponds one-to-one to the number of the adjusting wings 2, so that multiple adjusting wings 2 can be in different states. In other words, some of the multiple adjusting wings 2 of the underwater resistance adjusting assembly 100 of this embodiment can be in the working state and some can be in the retracted state. In this way, when the formation of the towed line array 200 is distorted, the underwater resistance adjusting assembly 100 can generate different deflection forces, so as to quickly restore the attitude of the towed line array 200.

[0053] The number of the adjusting wings 2 of the underwater resistance adjusting assembly 100 shown in the drawings is four, so as to quickly respond to the attitude adjustment of the towed line array 200. However, in other embodiments, the number of the evenly distributed adjusting wings 2 can also be two, three, five, etc. The present application does not limit this.

[0054] Reference Figures 4 to 7 , the driving part 3 includes a linear motor 31 moving along the axial direction Z and a connecting rod 32. One end of the connecting rod 32 is pivotally connected to the linear motor 31, and the other end is pivotally connected to the position of the adjusting wing 2 close to the pivot end 22. Among them, the pivotal position of the connecting rod 32 and the adjusting wing 2 is closer to the free end 21 than the pivotal position of the adjusting wing 2 and the housing part 1. Taking the example that the adjusting wing 2 needs to be switched from the working state to the retracted state:

[0055] The linear motor 31 drives the connecting rod 32 to move along the axial direction Z towards the first end 12, so that the connecting rod 32 drives the adjusting wing 2 to move towards the first end 12. Since the position where the connecting rod 32 is connected to the adjusting wing 2 is far from the pivot end 22, the movement of the connecting rod 32 along the axial direction Z towards the first end 12 drives the adjusting wing 2 to pivot around the pivot end 22, realizing the closing of the adjusting wing 2.

[0056] The cooperation of the linear motor 31 and the connecting rod 32 changes the linear movement of the linear motor 31 into the rotational movement of the adjusting wing 2. Therefore, the linear motor 31 can utilize the space of the towed line array 200 extending linearly along the axial direction Z as a whole, reduce the size of the underwater resistance adjusting assembly 100 in the radial direction, and further avoid large flow resistance generated by the large underwater resistance adjusting assembly 100 body when the underwater resistance adjusting assembly 100 does not need to work.

[0057] The housing part 1 includes an avoidance groove 14 communicating with the driving cavity 112, so that the connecting rod 32 can connect the driving rod 312 and the connecting rod 32 through the avoidance groove 14. And the driving part 3 is arranged in the accommodating cavity 11. Therefore, the housing part 1 needs to achieve a certain degree of sealing to prevent liquid from entering the accommodating cavity 11 and damaging the components during the movement of the connecting rod 32 in the avoidance groove 14.

[0058] Optionally, the housing part 1 includes a seal 15 arranged in the accommodating cavity 11. The seal 15 divides the accommodating cavity 11 into a sealed cavity 111 and a driving cavity 112 distributed along the axial direction Z. The linear motor 31 includes a motor body 311 and a driving rod 312. The motor body 311 is arranged in the sealed cavity 111. The driving rod 312 is arranged in the driving cavity 112 and passes through the seal 15 to be electrically connected to the motor body 311. The avoidance groove 14 communicates with the driving cavity 112. The arrangement of the avoidance groove 14 allows the housing part 1 to allow liquid to enter the driving cavity 112. And the arrangement of the seal 15 enables the housing part 1 to protect the motor body 311 that needs to achieve water isolation. Compared with the scheme of arranging a seal 15 in the avoidance groove 14, the movement of the connecting rod 32 along the axial direction Z in this embodiment is not hindered by the seal 15, which is beneficial to reducing the structural strength requirements of the connecting rod 32 and the smoothness of the movement, and thus improving the speed of the pivoting reaction of the adjusting wing 2.

[0059] It can also be seen from this that the driving direction of the linear motor 31 is along the axial direction Z. Therefore, the cooperation of the linear motor 31 and the connecting rod 32 also enables the seal 15 to divide the accommodating cavity 11 into a sealed cavity 111 and a driving cavity 112 along the axial direction Z. Compared with the scheme of directly pushing the adjusting wing 2 to pivot by the motor, the structural arrangement of the underwater resistance adjusting assembly 100 in this application is simpler, and at the same time, the protection performance for the motor body 311 is better.

[0060] The housing part 1 may include a first housing 16 and a second housing 17 arranged along the axial direction Z. A sealing cavity 111 is arranged in the first housing 16, and a driving cavity 112 is arranged in the second housing 17. A seal 15 is arranged in the sealing cavity 111 and is sealingly connected to the inner wall of the first housing 16. Subsequently, the first housing 16 and the second housing 17 are connected to achieve the assembly of the housing part 1. This setting method is beneficial to the processing of the first housing 16 and the second housing 17 and the assembly of the housing part 1. The second housing 17 may also be provided with a flow-through structure 171, so that the fluid entering the driving cavity 112 from the avoidance groove 14 can leave the driving cavity 112 from the flow-through structure 171, or the fluid entering the driving cavity 112 from the flow-through structure 171 can leave the driving cavity 112 from the avoidance groove 14. That is, the flow-through structure 171 and the avoidance groove 14 enable the liquid to form a circulation in the driving cavity 112. Therefore, when the adjusting wing 2 switches between the working state and the retracted state underwater, the fluid in the driving cavity 112 can quickly leave the driving cavity 112, or the external fluid can quickly enter the driving cavity 112.

[0061] Optionally, the second housing 17 is arranged as a cone, and the outer peripheral dimension gradually decreases in the direction from the first end 12 to the second end 13. In this way, the size of the second end 13 of the housing part 1 is smaller, so as to avoid interference between the driving part 3 driving the adjusting wing 2 to close and the housing part 1, and at the same time, there is no need to set an additional avoidance position to enable the adjusting wing 2 to fit the housing part 1 as much as possible.

[0062] Combined Figure 8 , optionally, the adjusting wing 2 includes a connecting plate 23 arranged at the pivoting end 22. The connecting plate 23 is arranged on the side of the adjusting wing 2 facing the housing and extends towards the housing part 1. The connecting rod 32 and the housing part 1 are respectively pivotally connected to the connecting plate 23. When the adjusting wing 2 is in the retracted state, the connecting plate 23 is received in the avoidance groove 14. The extending direction of the connecting plate 23 is different from that of the adjusting wing 2. Therefore, the setting of the connecting plate 23 can strengthen the strength of the adjusting wing 2 as a reinforcing rib structure. At the same time, when the adjusting wing 2 is in the working state, the free end 21 is on the side away from the housing part 1, so the water flow exerts a force on the free end 21 along the water flow direction. This force forms a bending moment on the adjusting wing 2 at the pivoting end 22. It can be seen that the connecting plate 23 is arranged at the pivoting end 22, which can improve the strength of the adjusting wing 2 against this bending moment at the pivoting end 22, prevent the adjusting wing 2 from being bent due to the force at the pivoting end 22 and causing the resistance adjustment to fail, and even further cause the fracture of the adjusting wing 2. In addition, the avoidance groove 14 can not only be used to avoid the movement of the connecting rod 32, but also be used to accommodate the connecting plate 23 protruding from the side of the adjusting wing 2 towards the housing part 1. Therefore, when the adjusting wing 2 is in the retracted state, the adjusting wing 2 can be kept in contact with the housing part 1 as much as possible, which is beneficial to improving the structural compactness of the underwater resistance adjustment assembly 100.

[0063] Further, the adjusting wing 2 and the housing part 1 can be connected through a connecting plate 23. As Figure 8 shown, a housing pivot hole 25 is provided on one side of the connecting plate 23 close to the pivot end 22 of the adjusting wing 2. The housing pivot hole 25 is pivotally connected to the housing part 1. The adjusting wing 2 can be directly connected to the housing part 1, but it can also be connected through a connecting seat 5 as Figure 9 shown. Combining Figure 6 , Figure 7 and Figure 8 , the second housing 17 includes a first assembly hole 172. A second assembly hole 52 is provided on the base 51 of the connecting seat 5. The base 51 and the second housing 17 are connected by setting fasteners in the second assembly hole 52 and the first assembly hole 172. A protruding portion 53 is prominently provided on one side of the base 51 away from the second housing 17. A wing plate connection hole 55323 is provided on the protruding portion 53. The adjusting wing 2 and the housing part 1 are pivotally connected by setting fasteners in the housing pivot hole 25 and the wing plate connection hole 55323. The setting of the connecting seat 5 can make the housing part 1 and the adjusting wing 2 have a certain distance in the axial Z direction, so that the opening and closing angle of the adjusting wing 2 can be increased as much as possible, and the resistance generated by the underwater resistance adjusting assembly 100 can be improved.

[0064] Further, there are two protruding portions 53, and a clamping space 54 of the connecting seat 5 is formed between the two protruding portions 53. The connecting plate 23 is arranged in the clamping space 54 and is connected to the connecting seat 5 through the wing plate connection holes 55323 on both sides. The setting of the clamping space 54 can limit the translational movement of the adjusting wing 2 in the direction of its rotation axis, which is beneficial to improving the structural stability of the underwater resistance adjusting assembly 100.

[0065] Similarly to the connecting seat 5, the connection between the connecting rod 32 and the adjusting wing 2 can also be carried out in a way of "clamping" the connecting plate 23. Combining Figure 8 and Figure 10 , the connecting plate 23 includes a connecting rod pivot hole provided away from the pivot end 22 relative to the housing pivot hole 25. The connecting rod 32 includes a body part 321 and an extension part 322 extending from the body part 321. A connection hole 323 is provided on the extension part 322. The adjusting wing 2 and the connecting rod 32 are pivotally connected by setting fasteners in the connecting rod pivot hole and the connection hole 323. Similarly, two extension parts 322 are distributed at intervals along the axis of the connection hole 323 of the connecting rod 32, and a receiving space 324 of the connecting rod 32 is formed between the two extension parts 322. The connecting plate 23 is arranged in the receiving space 324 and is then pivotally connected to the connecting rod 32 through the connection holes 323 on both sides. This setting method can also improve the structural strength of the connecting rod 32 and the adjusting wing 2.

[0066] The other end of the connecting rod 32 is connected to the linear motor 31, and two extension parts 322 may also be provided. This application will not elaborate on this anymore.

[0067] Return Figures 2 to 5 , in some alternative embodiments, the adjusting wing 2 is set to be arc-shaped. When the adjusting wing 2 is in the retracted state, the free end 21 and the pivot end 22 of the adjusting wing 2 are closer to the housing part 1 than the middle position. Compared with the flat adjusting wing 2, the arc-shaped adjusting wing 2 has a larger area. Therefore, the resistance that the adjusting wing 2 can generate underwater when in the working state is greater, which is beneficial to quickly generating the desired resistance value and realizing the deployment and attitude adjustment of the towed array 200. When the arc-shaped adjusting wing 2 is in the retracted state, the arc-shaped adjusting wing 2 makes the underwater resistance adjusting assembly 100 form a streamlined outer surface, which is beneficial to reducing the undesired resistance generated underwater and avoiding excessive force generated by the water resistance at the pivot end of the adjusting wing 2 to cause damage to the underwater resistance adjusting assembly 100.

[0068] Furthermore, in the direction from the first end 12 to the second end 13, the outer peripheral dimension of the housing part 1 first becomes larger and then smaller, so as to adapt to the shape of the arc-shaped adjusting wing 2 in the retracted state. Taking the embodiment shown in the drawings as an example, since the first housing 16 and the second housing 17 need to accommodate the driving part 3, their dimensions in the radial direction are larger. A cable socket 19 is provided on one side of the first housing 16 facing the first end 12 for realizing the electrical connection between the cable 210 and the driving part 3. The outer diameter of the cable socket 19 is smaller than that of the first housing 16. When the adjusting wing 2 is in the retracted state, the free end 21 is arranged close to the cable socket 19.

[0069] The housing part 1 may further include a transition protection part 18 with a radial dimension smaller than that of the first housing 16, which is sleeved outside the cable socket 19. The transition protection part 18 is connected to one side of the first housing 16 facing the first end 12 for improving the strength at the connection position of the cable 210 and the housing part 1. In this way, in the direction from the first end 12 to the second end 13, the outer diameters of the cable socket 19, the transition protection part 18 and the first housing 16 gradually increase. In the embodiment where the second housing 17 is a conical housing, the outer diameter of the housing part 1 gradually decreases in the direction towards the second end 13. When the adjusting wing 2 is in the retracted state, the whole adjusting wing 2 can fit the housing part 1, which is beneficial to improving the structural compactness and structural strength of the underwater resistance adjusting assembly 100.

[0070] In this embodiment, the free end 21 can be disposed close to the cable socket, so as to increase the length of the adjusting wing 2, and further enable the adjusting wing 2 to generate greater resistance. Alternatively, the free end 21 can be disposed close to the transition protection portion 18, so as to reduce the gap between the housing portion 1 and the free end 21, avoid damage to the free end 21 caused by force when storing the underwater resistance adjusting assembly 100, and at the same time prevent water flow from entering between the housing portion 1 and the adjusting wing 2 through the gap during underwater use, thereby applying a force to the pivot end 22 to cause the adjusting wing 2 to open.

[0071] Optionally, a protrusion is provided on the side of the free end 21 of the adjusting wing 2 facing the housing portion 1. When the adjusting wing 2 is in the retracted state, the protrusion is in contact with the housing portion 1. By providing the protrusion, the distance between the free end 21 of the adjusting wing 2 and the housing portion 1 of the underwater resistance adjusting assembly 100 is further reduced, which is beneficial to preventing a large amount of water flow from flowing between the adjusting wing 2 and the housing portion 1 and impacting the adjusting wing 2. At the same time, the reduction of the gap can also reduce the movable distance of the free end 21 towards the housing portion 1, and further reduce the problem that the adjusting wing 2 may be damaged.

[0072] Optionally, in the direction from the free end 21 to the pivot end 22, the width of the adjusting wing 2 first increases and then decreases. Since the adjusting wing 2 is arranged in an arc shape, when in the retracted state, the outer diameter of the adjusting wing 2 at the free end 21 and the outer diameter at the pivot end 22 are smaller than the outer diameter of the middle part. At this time, if the width of the adjusting wing 2 is uniform, there is a gap between the adjusting wing 2 and the adjusting wing 2. In this embodiment, by increasing the width of the middle position of the adjusting wing 2, not only the strength of the adjusting wing 2 is improved, but also the space between the adjusting wing 2 and the adjusting wing 2 is reasonably utilized. In addition, the increase in the width of the adjusting wing 2 can increase the force-bearing area of the adjusting wing 2 in the working state, increase the resistance that can be generated, and help the towed array 200 quickly adjust its attitude.

[0073] When the detection device does not need to use the towed array 200, the towed array 200 can be wound and retracted. At this time, the adjusting wing 2 can be in the retracted state, so as to avoid excessive space occupation. In some embodiments, the underwater resistance adjusting assembly 100 further includes a sling 4 provided at the second end 13. The sling 4 can be used to connect with a hook, so as to fix the wound towed array 200 and prevent it from loosening. Alternatively, when the underwater resistance adjusting assembly 100 is not connected to the cable 210, the sling 4 can also allow the underwater resistance adjusting assembly 100 to be hung on a wall or other positions to achieve reasonable storage.

[0074] The sling 4 can be directly welded to the housing portion 1. Or, as Figure 6As shown, the housing part 1 is provided with a lifting ring assembly hole 173 at the second end 13. The lifting ring 4 and the lifting ring assembly hole 173 are connected by, for example, threaded connection. A gasket, thread sealant, etc. can be provided between the lifting ring 4 and the housing part 1 to achieve tolerance absorption and improve the connection strength.

[0075] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the exact structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A towed line array, characterized in that, A cable, a detection element, and an underwater drag adjustment assembly; the underwater drag adjustment assembly includes: A housing part, including a receiving cavity and a first end and a second end oppositely arranged along the axis; An adjusting wing, including a free end and a pivoting end; the pivoting end is arranged at the second end so that the adjusting wing is pivotally connected to the housing part; and, A driving part, arranged in the receiving cavity; the driving part is connected to the adjusting wing to drive the adjusting wing to rotate around the pivoting end and change the distance between the free end and the housing part; The adjusting wing includes a working state and a retracted state: When in the working state, the free end is far from the housing part; When in the retracted state, the free end is close to the housing part and is closer to the first end than the pivoting end; The cable includes an interface end and a terminal arranged oppositely; the detection element is arranged between the interface end and the terminal and is electrically connected to the cable; the terminal is connected to the first end so that the cable supplies electric energy to the driving part.

2. The towed line array according to claim 1, characterized in that, The driving part includes a linear motor moving along the axis and a connecting rod; one end of the connecting rod is pivotally connected to the linear motor, and the other end is pivotally connected to a position of the adjusting wing close to the pivoting end; wherein, the pivoting position of the connecting rod and the adjusting wing is closer to the free end than the pivoting position of the adjusting wing and the housing part.

3. The towed line array according to claim 2, characterized in that, The linear motor includes a motor body and a driving rod; the housing part includes an avoidance groove; the connecting rod connects the driving rod and the connecting rod through the avoidance groove; Wherein, the housing part includes a seal arranged in the receiving cavity; the seal divides the receiving cavity into a sealed cavity and a driving cavity distributed along the axis; the motor body is arranged in the sealed cavity; the driving rod is arranged in the driving cavity and passes through the seal to be electrically connected to the motor body; the avoidance groove communicates with the driving cavity.

4. The towed line array according to claim 3, characterized in that, The adjusting wing includes a connecting plate arranged at the pivoting end; the connecting plate is arranged on the side of the adjusting wing facing the housing and extends towards the housing part; the connecting rod and the housing part are respectively pivotally connected to the connecting plate; When the adjusting wing is in the retracted state, the connecting plate is received in the avoidance groove.

5. The towed line array according to claim 2, wherein, The number of the adjusting wings includes a plurality; the number of the driving parts corresponds one-to-one with the number of the adjusting wings so that a plurality of the adjusting wings can be in different states.

6. The towed line array according to claim 1, wherein, The adjusting wing is arranged in an arc shape; when the adjusting wing is in the retracted state, the free end and the pivoting end of the adjusting wing are closer to the housing part than the middle position.

7. The towed line array according to claim 6, wherein, In the direction from the first end to the second end, the outer peripheral dimension of at least part of the housing part becomes larger; a protrusion is arranged on the side of the free end of the adjusting wing facing the housing part; when the adjusting wing is in the retracted state, the protrusion fits with the housing part.

8. The towed line array according to claim 6, characterized in that, In the direction from the free end to the pivoting end, the width of the adjusting wing first increases and then decreases.

9. A detection device, characterized in that, Including a power supply and a towed line array according to any one of claims 1-8; the interface end is electrically connected to the power supply.

Images