An under-ice noise monitoring system

Abstract

The present invention relates to the technical field of under-ice noise monitoring, and in particular to an under-ice noise monitoring system, comprising a first pulling member connected to an ice layer and a monitoring device connected to the lower end of the pulling member, the monitoring device comprising a columnar shell; the lower part of the columnar shell is rotatably connected to a plurality of swing arm members, and a plurality of hydrophones are spaced apart axially on each swing arm member, a driving device is provided in the columnar shell, and the driving device is connected to a transmission rod, the lower end of the transmission rod passes through the columnar shell and is connected to a column, and each swing arm member is hinged with a push-pull rod, and the other end of each push-pull rod extends downward toward the column and is hinged to the column; the driving device can drive the column away from or close to the columnar shell through the transmission rod, thereby causing each swing arm member to swing upward or downward; the monitoring device can be placed below the ice layer through an ice hole, and each swing arm member can be unfolded under the ice, so that each hydrophone forms a planar array, thereby realizing noise monitoring on a horizontal scale under the ice.

Description

Technical Field

[0001] The present invention relates to the technical field of under-ice noise monitoring, and in particular to an under-ice noise monitoring system. Background Art

[0002] Most of the sea areas at high latitudes, especially in the Arctic and Antarctic regions, are covered by sea ice all year round. Processes such as sea ice breakup, ice ridge formation, and ice floe collision and friction will generate a large amount of noise. Therefore, by monitoring sub-ice noise, it is possible to monitor sea ice breakup, ice ridge formation, and ice floe collision, which is of great significance for studying global climate change.

[0003] Limited by the size of the ice drill, the maximum diameter of the ice hole is about 25 cm. Arctic acoustic surveys usually use a vertical array. Multiple hydrophones are tied to a Kevlar rope to form a simple vertical array. Ice workers release the Kevlar rope through the ice hole to record vertical noise.

[0004] However, vertical arrays can only record sound data on the vertical scale and cannot achieve horizontal noise monitoring, making it difficult to locate noise events such as sea ice breakup, ice ridge formation, and ice floe collision. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that, due to the limitations of on-ice working conditions, the existing under-ice noise monitoring system is unable to monitor the noise at the horizontal scale under the ice.

[0006] In order to solve the above technical problems, the present invention aims to provide an under-ice noise monitoring system, comprising a first pulling member and a monitoring device, wherein the upper end of the first pulling member is connected to the ice layer, and the monitoring device comprises a cylindrical housing connected to the lower end of the first pulling member; a plurality of swing arms are connected to the lower portion of the cylindrical housing so as to rotate up and down, and the swing arms are arranged in a divergent shape around the axis of the cylindrical housing, and each swing arm is provided with a plurality of hydrophones spaced apart along the axial direction;

[0007] A sealed cavity is provided in the cylindrical housing, a driving device is provided in the sealed cavity, a transmission rod is connected to the driving device, the lower end of the transmission rod is sealed and passes through the bottom wall of the sealed cavity and is connected to the column, and a push-pull rod is hinged on each of the swing arms, and the other end of each push-pull rod extends downward toward the column and is hinged to the column;

[0008] The driving device drives the column away from the columnar housing to make each of the swing arms swing downward, or drives the column close to the columnar housing to make each of the swing arms swing upward.

[0009] As a preferred solution, the driving device includes a motor, the transmission rod is a screw connected to the output shaft of the motor for rotation, and the column is sleeved on the outside of the screw and threadedly connected to the screw.

[0010] As a preferred solution, the bottom of the screw is provided with a first protrusion extending radially outwardly along the screw, and the first protrusion is provided with a first proximity switch arranged vertically opposite to the column;

[0011] A controller is provided in the sealed cavity, and the motor and the first proximity switch are both electrically connected to the controller.

[0012] As a preferred embodiment, the screw is provided with a second protrusion extending radially outward along the screw at a position between the cylindrical shell and the column, and the second protrusion is provided with a second proximity switch arranged above and below the column, and the second proximity switch is electrically connected to the controller.

[0013] As a preferred solution, the cylindrical shell includes a barrel body with an opening facing downward and a circular base with a sealing cover arranged at the opening, and the barrel body and the base enclose the sealed cavity.

[0014] As a preferred solution, each of the swing arm members is connected to the middle of the bottom wall of the cylindrical shell.

[0015] As a preferred solution, a hanging ring is provided at the upper end of the columnar shell, and the lower end of the first pulling member is connected to the hanging ring.

[0016] As a preferred embodiment, each of the swing arm members includes a first swing rod, a second swing rod, a first connecting rod, a second connecting rod, and a triangular connecting plate; the first end of each of the first swing rods is vertically connected to the lower end of the cylindrical housing, the second end of each of the first swing rods is hinged to the first end of the corresponding second swing rod, and each of the hydrophones is disposed on the first swing rod and / or the second swing rod;

[0017] The first end of each triangular connecting plate is vertically rotatably connected to the second end of the corresponding first swing link via a first rotating shaft, the first end of each first connecting rod is vertically rotatably connected to the lower end of the cylindrical housing, the second end of each first connecting rod is hingedly connected to the second end of the corresponding triangular connecting plate, the third end of each triangular connecting plate is hingedly connected to the first end of the corresponding second connecting rod, and the second end of each second connecting rod is hingedly connected to the middle portion of the corresponding second swing link;

[0018] One end of each push-pull rod away from the column is connected to the middle part of the first rocker arm, and each push-pull rod pushes the corresponding first rocker arm to swing upward, so that the corresponding first connecting rod pulls the triangular connecting plate to rotate downward around the first rotating axis, so that the second connecting rod pulls the second rocker arm to swing in the direction away from the columnar shell; each push-pull rod pulls the corresponding first rocker arm to swing downward, so that the corresponding first connecting rod pushes the triangular connecting plate to rotate upward around the first rotating axis, so that the second connecting rod pushes the second rocker arm to swing in the direction close to the columnar shell.

[0019] As a preferred solution, there are multiple monitoring devices, each of which is spaced apart and arranged vertically, and a second pulling member is connected between two adjacent monitoring devices.

[0020] As a preferred solution, the first pulling member and each of the second pulling members are ropes.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the under-ice monitoring system of the present invention comprises a first pulling member and a monitoring device, the upper end of the first pulling member is connected to the ice layer, the lower end of the first pulling member passes through the ice hole in the ice layer and is connected to the monitoring device, thereby connecting the monitoring device to the ice layer; the monitoring device comprises a columnar shell, the lower part of the columnar shell is connected to a plurality of swing arm members for rotating up and down, the swing arm members are arranged at intervals around the axis of the columnar shell, and a plurality of hydrophones are arranged at intervals along the axial direction of each swing arm member; a sealed cavity is provided in the columnar shell, a driving device is provided in the sealed cavity, the driving device is connected to a transmission rod, the lower end of the transmission rod is sealed and passes through the bottom wall of the sealed cavity and is connected to the column; each swing arm member is hinged with a push-pull rod, and each push-pull rod The other end of each extends downward toward the column and is hinged to the column; the driving device drives the column away from the columnar shell through the transmission rod, so that each swing arm can swing downward, thereby reducing the cross-sectional size of the monitoring device, and the operator can place the monitoring device below the ice surface through the ice hole; the driving device drives the column close to the columnar shell through the transmission rod, so that each swing arm can swing upward, so that the hydrophones located under the ice form a planar array, thereby realizing noise monitoring on a horizontal scale; therefore, the under-ice noise monitoring system of the present invention can place the monitoring device below the ice layer through the ice hole, and each swing arm can be unfolded under the ice, so that the hydrophones form a planar array, thereby realizing noise monitoring on a horizontal scale under the ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the under-ice monitoring system of the present invention when in use;

[0023] Figure 2 It is a structural diagram of the monitoring device when the swing arm is deployed;

[0024] Figure 3 It is a structural diagram of the monitoring device in the folded state of the swing arm;

[0025] Figure 4 This is an exploded view of the monitoring device;

[0026] Figure 5 Schematic diagram of the structure of the swing arm during the folding process;

[0027] Figure 6 It is a schematic diagram of the under-ice monitoring system of the present invention when multiple monitoring devices are provided;

[0028] In the figure, 100, monitoring device; 1, cylindrical shell; 11, barrel; 12, base; 13, lifting ring; 14, circuit board; 15, power supply; 16, fastener; 17, coupling; 18, rolling bearing; 2, column; 3, swing arm; 31, first swing arm; 32, second swing arm; 33, first connecting rod; 34, second connecting rod; 35, triangular connecting plate; 36, first rotating shaft; 4, hydrophone; 5, push-pull rod; 6, driving device; 7, transmission rod; 71, first protrusion; 72, first proximity switch; 73, second protrusion; 74, second proximity switch; 200, first pulling member; 300, ice layer; 301, ice hole; 400, second pulling member. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0031] like Figures 1 to 6As shown, a preferred embodiment of the under-ice noise monitoring system of the present invention includes a first pulling member 200 and a monitoring device 100. The upper end of the first pulling member 200 is connected to the ice layer 300. When in use, the monitoring device 100 is located under the ice. The monitoring device 100 includes a cylindrical shell 1 connected to the lower end of the first pulling member; the lower end of the first pulling member 200 passes through the ice hole 301 and is connected to the monitoring device 100, thereby connecting the monitoring device 100 to the ice layer 300; the lower part of the cylindrical shell 1 is connected to a plurality of swing arm members 3 for vertical rotation, and each swing arm member 3 is arranged in a divergent shape around the axis of the cylindrical shell 1, and each swing arm member 1 is axially spaced apart with a plurality of hydrophones 4; a sealed cavity is provided in the cylindrical shell 1, and a driving device 6 is provided in the sealed cavity, and the driving device 6 is connected to a transmission rod 7, and the lower end of the transmission rod 7 is sealed and passes through the bottom wall of the sealed cavity and is connected to the column 2, and each swing arm member 3 are hinged with push-pull rods 5, and the other end of each push-pull rod 5 extends downward toward the column 2 and is hinged to the column 2; the driving device 6 drives the column 2 away from the cylindrical shell 1 through the transmission rod 7, which can make each swing arm 3 swing downward, thereby reducing the cross-sectional size of the monitoring device 100, and the operator can place the monitoring device 100 below the ice surface 300 through the ice hole 301; the driving device 6 drives the column 2 to approach the cylindrical shell 1 through the transmission rod 7, which can make each swing arm 3 swing upward, so that the hydrophones 4 located under the ice form a planar array, thereby realizing noise monitoring on a horizontal scale; therefore, the under-ice noise monitoring system of the present invention can place the monitoring device 100 below the ice layer through the ice hole 301, and each swing arm 3 can be unfolded under the ice, so that the each hydrophone 4 forms a planar array, thereby realizing noise monitoring on a horizontal scale under the ice.

[0032] The drive device 6 includes a motor, a transmission rod 7 is a screw connected to the output shaft of the motor, and the column 2 is sleeved on the outside of the screw and is threadedly connected to the screw. Specifically, the swing arms 7 are evenly spaced around the axis of the housing 1, and the lower ends of the swing arms 7 are hinged to the outer periphery of the column 2. When the motor drives the screw to rotate, the swing arms 7 can provide a restraining force to the column 2, so that the column 2 does not produce rotational displacement. Under the action of the screw, the column 2 can reciprocate along the axial direction of the screw. In other embodiments of the present invention, the drive device 6 is an electric telescopic rod, and the telescopic end of the electric telescopic rod extends out of the sealed cavity and forms the transmission rod 7.

[0033] Furthermore, the bottom of the screw is provided with a first protrusion 71 extending radially outward from the screw. A first proximity switch 72 is mounted on the first protrusion 71, located vertically opposite the column 2. A controller is housed within the sealed chamber, and both the motor and the first proximity switch 72 are electrically connected to the controller. A second protrusion 73 extending radially outward from the screw is mounted between the cylindrical housing 1 and the column 2. A second proximity switch 74 is mounted on the second protrusion 73, located vertically opposite the column 2, and electrically connected to the controller.

[0034] Specifically, the first proximity switch 72 and the second proximity switch 74 are both waterproof proximity switches. When the distance between the lower end surface of the column 2 and the upper end surface of the first proximity switch 72 reaches a first set value, the first proximity switch 72 sends an electrical signal to the controller, causing the motor to stop rotating. When the distance between the upper end surface of the column 2 and the lower end surface of the second proximity switch 74 reaches a second set value, the second proximity switch 74 sends an electrical signal to the controller, causing the motor to stop rotating. Furthermore, the first protrusion 71 and the second protrusion 73 are both rings that are sleeved on the screw, and both the first protrusion 71 and the second protrusion 73 are movable along the axial direction of the screw. By adjusting the position of the first protrusion 71 and the second protrusion 73 on the screw, the open and closed positions of the swing arm 3 can be adjusted.

[0035] In this embodiment, Figure 6 As shown, the cylindrical housing 1 comprises a barrel body 11 with a downward opening and a circular base 12 with a sealing cover positioned at the opening. The barrel body 11 and the base 12 form a sealed chamber. Specifically, the barrel body 11 and the base 12 are detachably connected via a plurality of fasteners 16. A circuit board 14 and a power supply 15 are also located within the sealed chamber. Both the circuit board 14 and the power supply 15 are electrically connected to a controller. The output shaft of the motor is fixedly connected to a screw via a coupling 17. A rolling bearing 18 is sleeved around the upper end of the screw and coaxially inserted into the bottom of the base 12.

[0036] Each swing arm member 3 is connected to the middle of the bottom wall of the cylindrical shell 1, so that the outer contour enclosed by each swing arm member 3 after folding can be close to the diameter of the cylindrical shell 1, making the monitoring device 100 more compact and convenient for passing through the ice hole 301.

[0037] A hanging ring 13 is provided at the upper end of the columnar housing 1 , and the first pulling member is a rope, the lower end of which is connected to the hanging ring 13 .

[0038] In this embodiment, Figure 2 、 Figure 5As shown, each swing arm member 3 includes a first swing rod 31, a second swing rod 32, a first connecting rod 33, a second connecting rod 34 and a triangular connecting plate 35; the first end of each first swing rod 31 is connected to the lower end of the cylindrical shell 1 for vertical rotation, the second end of each first swing rod 31 is hinged to the first end of the corresponding second swing rod 32, and each hydrophone 4 is arranged on the first swing rod 31 and / or the second swing rod 32; the first end of each triangular connecting plate 35 is connected to the second end of the corresponding first swing rod 31 for vertical rotation through a first rotating shaft 36, the first end of each first connecting rod 33 is connected to the lower end of the cylindrical shell 1 for vertical rotation, the second end of each first connecting rod 33 is hinged to the second end of the corresponding triangular connecting plate 35, and the third end of each triangular connecting plate 35 The ends are hinged to the first ends of the corresponding second connecting rods 34, and the second ends of the second connecting rods 34 are hinged to the middle parts of the corresponding second rocker rods 32; the ends of the push-pull rods 5 away from the column 2 are connected to the middle parts of the first rocker rod 31, and each push-pull rod 5 pushes the corresponding first rocker rod 31 to swing upward, so that the corresponding first connecting rod 33 pulls the triangular connecting plate 35 to rotate downward around the first rotation axis 36, so that the second connecting rod 34 pulls the second rocker rod 32 to swing in the direction away from the cylindrical shell 1; each push-pull rod 5 pulls the corresponding first rocker rod 31 to swing downward, so that the corresponding first connecting rod 33 pushes the triangular connecting plate 35 to rotate upward around the first rotation axis 36, so that the second connecting rod 34 pushes the second rocker rod 32 to swing in the direction close to the cylindrical shell 1.

[0039] In other embodiments of the present invention, Figure 6 As shown, there are multiple monitoring devices 100, each monitoring device 100 is arranged at intervals in the upper and lower parts, and a second pulling member 400 is connected between two adjacent monitoring devices 100. Specifically, each second pulling member is a rope.

[0040] In summary, the under-ice noise monitoring system of the present invention can place the monitoring device 100 below the ice layer 300 through the ice hole 301, and each swing arm member 3 can be unfolded under the ice, so that the hydrophones 4 arranged at intervals along the axial direction of each swing arm member 3 form a planar array, thereby realizing noise monitoring on a horizontal scale under the ice.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An under-ice noise monitoring system, characterized in that: The invention comprises a first pulling member (200) and a monitoring device (100), wherein the upper end of the first pulling member (200) is connected to the ice layer (300), and the monitoring device (100) comprises a columnar shell (1) connected to the lower end of the first pulling member (200); the lower part of the columnar shell (1) is connected to a plurality of swing arms (3) for vertical rotation, and each of the swing arms (3) is arranged in a divergent shape around the axis of the columnar shell (1), and each of the swing arms (3) is provided with a plurality of hydrophones ( 4); each of the swing arm members (3) comprises a first swing rod (31), a second swing rod (32), a first connecting rod (33), a second connecting rod (34) and a triangular connecting plate (35); the first end of each of the first swing rods (31) is connected to the lower end of the columnar housing (1) in an up-and-down rotation manner, the second end of each of the first swing rods (31) is hinged to the first end of the corresponding second swing rod (32), and each of the hydrophones (4) is arranged on the first swing rod (31) and / or the second swing rod (32); The first end of each triangular connecting plate (35) is connected to the second end of the corresponding first swing rod (31) for vertical rotation through a first rotating shaft (36); the first end of each first connecting rod (33) is connected to the lower end of the columnar shell (1) for vertical rotation; the second end of each first connecting rod (33) is hinged to the second end of the corresponding triangular connecting plate (35); the third end of each triangular connecting plate (35) is hinged to the first end of the corresponding second connecting rod (34); and the second end of each second connecting rod (34) is hinged to the middle part of the corresponding second swing rod (32); A sealed cavity is provided in the cylindrical housing (1), a driving device (6) is provided in the sealed cavity, the driving device (6) is connected to a transmission rod (7), the lower end of the transmission rod (7) is sealed and passes through the bottom wall of the sealed cavity and is connected to the column (2), each of the swing arm members (3) is hinged with a push-pull rod (5), and the other end of each push-pull rod (5) extends downward in a direction close to the column (2) and is hinged to the column (2); The driving device (6) drives the column (2) away from the columnar housing (1) to cause each swing arm member (3) to swing downward, or drives the column (2) close to the columnar housing (1) to cause each swing arm member (3) to swing upward.

2. The under-ice noise monitoring system according to claim 1, characterized in that: The driving device (6) comprises a motor, the transmission rod (7) is a screw connected to the output shaft of the motor for rotation, and the column (2) is sleeved on the outside of the screw and is threadedly connected to the screw.

3. The under-ice noise monitoring system according to claim 2, characterized in that: The bottom of the screw is provided with a first protrusion (71) extending radially outward from the screw, and the first protrusion (71) is provided with a first proximity switch (72) arranged vertically opposite to the column (2); A controller is provided in the sealed cavity, and the motor and the first proximity switch (72) are both electrically connected to the controller.

4. The under-ice noise monitoring system according to claim 3, characterized in that: The screw is provided with a second protrusion (73) extending radially outwardly along the screw at a position between the columnar housing (1) and the column (2); the second protrusion (73) is provided with a second proximity switch (74) arranged vertically opposite to the column (2); the second proximity switch (74) is electrically connected to the controller.

5. The under-ice noise monitoring system according to claim 1, characterized in that: The columnar housing (1) comprises a barrel body (11) with an opening facing downward and a circular base (12) with a sealing cover arranged at the opening, and the barrel body (11) and the base (12) enclose the sealed cavity.

6. The under-ice noise monitoring system according to claim 1, characterized in that: Each of the swing arm members (3) is connected to the middle portion of the bottom wall of the columnar housing (1).

7. The under-ice noise monitoring system according to claim 1, characterized in that: The upper end of the columnar housing (1) is provided with a hanging ring (13), and the lower end of the first pulling member is connected to the hanging ring (13).

8. The under-ice noise monitoring system according to claim 1, characterized in that: One end of each push-pull rod (5) away from the column (2) is connected to the middle part of the first swing rod (31), and each push-pull rod (5) pushes the corresponding first swing rod (31) to swing upward, so that the corresponding first connecting rod (33) pulls the triangular connecting plate (35) to rotate downward around the first rotating shaft (36), so that the second connecting rod (34) pulls the second swing rod (32) to swing in a direction away from the columnar shell (1); each push-pull rod (5) pulls the corresponding first swing rod (31) to swing downward, so that the corresponding first connecting rod (33) pushes the triangular connecting plate (35) to rotate upward around the first rotating shaft (36), so that the second connecting rod (34) pushes the second swing rod (32) to swing in a direction close to the columnar shell (1).

9. The under-ice noise monitoring system according to any one of claims 1 to 8, characterized in that: There are a plurality of monitoring devices (100), each of which is spaced apart and arranged vertically, and a second pulling member (400) is connected between two adjacent monitoring devices (100).

10. The under-ice noise monitoring system according to claim 9, characterized in that: The first pulling member (200) and each of the second pulling members (400) are rope bodies.

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