Bottom-supported underwater measurement array

Abstract

The utility model discloses a bottom-supported underwater measurement array which is characterized in that the bottom-supported underwater measurement array comprises a horizontal pipe, a watertight cabin body and a counterweight unit which are arranged from top to bottom, and the horizontal pipe is configured to be a foldable structure and is used for installing a hydrophone array; the watertight bin body is arranged below the middle of the horizontal pipe, and a rotary driving piece is arranged in the watertight bin body, connected with the horizontal pipe and used for driving the horizontal pipe to rotate. And the counterweight unit is arranged at the lower part of the watertight bin body, so that the horizontal pipe sinks underwater, and bottom sitting of the measurement array is realized. The measurement array can be rapidly unfolded or folded according to needs to complete laying and recovery, the accuracy of noise measurement is improved by adopting a bottom-supported laying mode, and the measurement array can rotate underwater to test measured targets from different directions.

Description

Technical Field

[0001] This utility model relates to the field of underwater measurement array technology, specifically to a bottom-mounted underwater measurement array. Background Technology

[0002] The noise level of underwater vehicles has become a key indicator for evaluating their performance. Accurate and rapid measurement of vehicle noise has become a research focus for many companies. Currently, the measurement of underwater vehicles mainly relies on underwater noise measurement arrays, which can be deployed in three main ways:

[0003] The first type uses surface buoys for release. The array is suspended in the water by a buoy on the surface. This method is quick and simple, but it is extremely dependent on hydrological conditions and is suitable for calm conditions. Surface waves and other disturbances can easily cause noise interference.

[0004] The second type is to use fixed underwater measurement arrays, which can improve measurement accuracy and efficiency, but the site selection conditions for underwater acoustic test sites are stringent, the construction and maintenance costs are expensive, and they lack mobility.

[0005] The third type uses vertical measurement arrays, but this requires a high water depth. However, most of the seas around my country are shallow, making vertical array deployment unsuitable.

[0006] Therefore, there is an urgent need for an underwater noise measurement array that is quick and easy to deploy and retrieve, and provides accurate and efficient measurements. Utility Model Content

[0007] To address the aforementioned issues, this invention provides a bottom-mounted underwater measurement array. The measurement array can be quickly deployed or folded for deployment and retrieval as needed. The bottom-mounted deployment method improves the accuracy of noise measurement. The measurement array can rotate underwater to test targets from different directions.

[0008] Specifically, this utility model provides a bottom-mounted underwater measurement array, comprising:

[0009] The horizontal tube is configured as a detachable structure for mounting hydrophone arrays;

[0010] A watertight compartment is located below the middle of the horizontal tube, and a rotary drive is provided inside the compartment. The rotary drive is connected to the horizontal tube and is used to drive the horizontal tube to rotate.

[0011] A counterweight unit is located at the bottom of the watertight compartment so that the horizontal pipe sinks underwater.

[0012] Furthermore, the horizontal tube comprises several sub-tubes, with adjacent sub-tubes being plugged in.

[0013] Furthermore, adjacent sections of the female tube are connected by a male and a female connector, and a spring is provided between the male and female connectors. When the male and female connectors are connected, the spring is in a stretched state.

[0014] Furthermore, one end of the female head is provided with a pin, the position of which is adjustable in the axial direction of the male tube, and the spring is connected to the pin via a hook.

[0015] Furthermore, one end of the female tube is provided with several positioning holes arranged along the axial direction, and the pin is located in any of the positioning holes.

[0016] Furthermore, the counterweight unit includes:

[0017] The connecting rod is located at the bottom of the watertight compartment.

[0018] The counterweight is connected to the connecting rod via a telescopic rod, which in turn is connected to the connecting rod via a cross-shaped universal joint.

[0019] Furthermore, the watertight chamber is equipped with an attitude sensor and a depth sensor. The attitude sensor is used to collect the attitude information of the horizontal tube, and the depth sensor is used to collect the depth information.

[0020] Furthermore, buoyancy materials are provided at both ends of the horizontal tube.

[0021] Furthermore, the counterweight is spherical.

[0022] The working principle of this utility model:

[0023] When assembling the horizontal tube 1, adjust the position of the pin 114 at the female end of the sub-tube 11 (achieved by inserting into different positioning holes). Then, hang one end of the spring 115 on the male end 111 of the other sub-tube 11 onto the pin 114, and insert the male end 111 into the female end 112 to connect the two adjacent sub-tube sections 11. After connection, the spring 115 remains in a stretched state, and the tension of the spring 115 ensures that the two sub-tube sections 11 remain in the plugged state. After the entire device is assembled, it is lowered into the water. After the measurement array sinks to the bottom, the attitude of the measurement array is monitored and adjusted through the watertight cable 61. The horizontal tube 1 is driven to rotate by a rotary drive component. The counterweight 33 is fixed after sinking to the bottom. The lower part of the watertight chamber 2 is restricted by the cross-shaft universal joint 34, preventing the watertight chamber 2 from rotating in the horizontal direction. This fixes the rotary drive component, which can drive the horizontal tube 1 to rotate. Adjustments are made according to the direction of travel of the measurement target to complete the acquisition of noise data at different angles.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] (1) This utility model uses several sections of sub-tubes that are connected end to end to form a horizontal tube. It can be disassembled by pulling horizontally without screw fixing, which can realize the rapid assembly and disassembly of the horizontal tube, and it is easy to store after disassembly.

[0026] (2) The underwater measurement array is a hard-connected array, which can ensure the horizontal and vertical relative positions of each hydrophone, and has higher accuracy than the soft-connected array connected by ropes.

[0027] (3) The horizontal tube can be driven to rotate by a rotary drive component, and its direction in the plane can be adjusted so that the measurement array can test the target from different directions underwater. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the bottom-mounted underwater measurement array in Example 1;

[0029] Figure 2 This is a schematic diagram of the folding of the bottom-mounted underwater measurement array in Example 1;

[0030] Figure 3 This is an exploded view of the sub-tube in Example 1;

[0031] Figure 4 This is a cross-sectional view of the connection between the male and female connectors in Example 1;

[0032] Figure 5 This is a schematic diagram showing the usage status of the bottom-mounted underwater measurement array in Example 1;

[0033] Figure 6 This is a schematic diagram of the bottom-mounted underwater measurement array in Example 2;

[0034] Figure 7 This is a schematic diagram of the cross-shaped universal joint in Example 2;

[0035] Figure 8 This is a schematic diagram showing the usage status of the bottom-mounted underwater measurement array in Example 2;

[0036] Figure 9 This is a schematic diagram of the use of the bottom-mounted underwater measurement array in complex underwater terrain in Example 2.

[0037] Figure label:

[0038] 1-Horizontal tube; 11-Daughter tube; 111-Male connector; 112-Female connector; 113-Positioning hole; 114-Pin; 115-Spring; 12-Buoyancy material; 2-Watertight chamber; 21-Depth sensor; 22-Attitude sensor; 31-Connecting rod; 32-Telescopic rod; 33-Counterweight; 34-Cross universal joint; 4-Rotary motor; 41-Fixed rod; 55-Hydrophone; 6-Surveying vessel; 61-Watertight cable; 7-Surveying target. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] like Figure 1 As shown, this embodiment provides a bottom-mounted underwater measurement array, including: a horizontal pipe 1, a watertight chamber 2, and a counterweight unit arranged sequentially from top to bottom. An optical fiber hydrophone array is installed on the horizontal pipe 1. The three together form a T-shaped underwater measurement array. Under the action of the counterweight unit, the underwater measurement array sinks to the bottom, realizing the deployment of the underwater measurement array in the water.

[0042] Specifically, such as Figure 2-4 As shown, the horizontal pipe 1 is composed of multiple sub-pipes 11. The sub-pipes 11 are hollow pipes, and hydrophones 55 are installed on them. The hydrophones 55 are evenly installed on the horizontal pipe 1 to ensure that the spacing and horizontal height are consistent. One end of the female tube 11 is a male connector 111, and the other end is a female connector 112. Adjacent female tube sections 11 are connected by inserting the male connector 111 and the female connector 112. A spring 115 is installed between the male connector 111 and the female connector 112. The spring 115 is hooked onto a pin 114 inside the female connector 112. One end of the female connector 112 has several axially arranged positioning holes 113. The pin 114 is inserted into any of the positioning holes 113. The specific positioning hole 113 is selected based on the spring 115, but it must be ensured that after the male connector 111 and the female connector 112 are inserted (in the use state), the spring 115 remains in a stretched state. Under the tension of the spring 115, the male connector 111 and the female connector 112 are secured, preventing them from coming off underwater. When not in use, the male connector 111 and the female connector 112 can be detached to disassemble and store the horizontal tube 1.

[0043] The watertight chamber 2 is located below the middle of the horizontal tube 1, and houses a rotary motor 4, a depth sensor 21, and an attitude sensor 22. A fixing rod 41 is installed in the middle of the horizontal tube 1, located at the center of gravity of the horizontal tube 1. The lower end of the fixing rod 41 is connected to the rotary motor 4. The fixing rod 41 and the watertight chamber 2 are sealed with an O-ring. The rotary motor 4 drives the horizontal tube 1 to rotate, adjusting its angle to meet the data acquisition requirements of the measurement target 15 in various directions of travel, and to complete the acquisition of noise data at different angles. The depth sensor 21 and attitude sensor 22 are used to acquire the depth and attitude of the underwater measurement array. The hydrophone 55, depth sensor 21, attitude sensor 22, and rotary motor 4 are connected to the measurement vessel 6 via a watertight cable 61 for corresponding signal and data transmission.

[0044] The counterweight unit includes a telescopic rod 32 and a counterweight body 33. The telescopic rod 32 is fixed to the bottom of the watertight chamber 2 and is used to adjust the height of the horizontal pipe 1. Specifically, as shown... Figure 5 As shown, during use, after the underwater measurement array is assembled, the telescopic rod 32 is adjusted to the specified height, and the measurement array is horizontally deployed from the water surface through the watertight cable 61. After the measurement array sinks and sits on the bottom, the attitude of the underwater array is monitored and adjusted through the watertight cable 61. The measurement vessel 6 can complete the actual navigation dynamic holographic noise measurement. According to the direction of travel of the measurement target 7, the horizontal tube 1 can be rotated to complete the noise data acquisition at different angles.

[0045] Example 2

[0046] like Figure 6-7 As shown, the counterweight unit includes a connecting rod 31, a telescopic rod 32, and a counterweight 33. The connecting rod 31 is fixed to the bottom of the watertight chamber 2. The telescopic rod 32 consists of three sections with a telescopic length ranging from 10 meters to 29 meters. The lower end of the telescopic rod 32 is connected to a spherical counterweight 33. The spherical counterweight 33 reduces the contact area between the weight and the bottom of the water, thus reducing the impact of uneven bottom terrain on the measurement array. The connecting rod 31 and the telescopic rod 32 are connected by a universal joint 34. After the counterweight 33 is fixed at the bottom, the upper telescopic rod 32 is fixed. Under the constraint of the universal joint, the upper connecting rod 31 and the telescopic rod 32 can only be adjusted around the axial direction of the universal joint, while the connecting rod 31 cannot rotate around its axial direction. That is, the rotary motor 4 will not rotate around the axial direction of the connecting rod 31, allowing the rotary motor 4 to drive the upper horizontal tube 1 to rotate, meeting the requirements for noise data acquisition at different angles.

[0047] Buoyancy elements 12 are installed at both ends of the horizontal tube 1 to provide positive buoyancy for the horizontal tube 1. When the measuring array is deployed in complex underwater terrain, such as Figure 9 As shown, the telescopic rod 32 cannot be vertical and tilts. Since the horizontal tube 1 is positively buoyant, the positive buoyancy will drive the connecting rod 31 to rotate around the cross axis, ensuring that the measuring array is still horizontal and that it can still perform normal measurements.

[0048] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A bottom-mounted underwater measurement array, characterized in that, include: The horizontal tube (1) is configured as a detachable structure for mounting a hydrophone array; A watertight chamber (2) is located below the middle part of the horizontal pipe (1), and a rotary drive is provided inside it. The rotary drive is connected to the horizontal pipe (1) and is used to drive the horizontal pipe (1) to rotate. A counterweight unit is located at the lower part of the watertight chamber (2) so that the horizontal pipe (1) sinks underwater.

2. The bottom-mounted underwater measurement array as described in claim 1, characterized in that, The horizontal tube (1) consists of several sub-tubes (11), with adjacent sub-tubes (11) being plugged in.

3. The bottom-mounted underwater measurement array as described in claim 2, characterized in that, The adjacent two sections of the sub-tube (11) are connected by a male connector (111) and a female connector (112). A spring (115) is provided between the male connector (111) and the female connector (112). When the male connector (111) and the female connector (112) are connected, the spring (115) is in a stretched state.

4. The bottom-mounted underwater measurement array as described in claim 3, characterized in that, The female head (112) is provided with a pin (114) at one end. The position of the pin (114) in the axial direction of the female tube (11) is adjustable. The spring (115) is connected to the pin (114) through a hook.

5. The bottom-mounted underwater measurement array as described in claim 4, characterized in that, The female head (112) of the female tube (11) is provided with a plurality of positioning holes (113) arranged along the axial direction, and the pin (114) is provided in any of the positioning holes (113).

6. The bottom-mounted underwater measurement array as described in claim 1, characterized in that, The counterweight unit includes: Connecting rod (31) is located at the bottom of watertight compartment (2); The counterweight (33) is connected to the connecting rod (31) via a telescopic rod (32), and the telescopic rod (32) and the connecting rod (31) are connected via a cross-shaped universal joint (34).

7. The bottom-mounted underwater measurement array as described in claim 1, characterized in that, The watertight chamber (2) is equipped with an attitude sensor (22) and a depth sensor (21), which are used to collect the depth and attitude of the underwater measurement array.

8. The bottom-mounted underwater measurement array as described in claim 1, characterized in that, The horizontal tube (1) is provided with buoyancy material (12) at both ends.

9. The bottom-mounted underwater measurement array as described in claim 6, characterized in that, The counterweight (33) is spherical.

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