Ship bubble wake flow measurement platform based on multi-beam sonar

Abstract

The utility model provides a ship bubble wake flow measurement platform based on multi-beam sonar, and belongs to the technical field of bubble wake flow measurement. The measuring platform comprises a floating device, a fixing device, a sonar connecting device and a multi-beam sonar. The multi-beam sonar is installed in the center of the sonar connecting device, the sonar connecting device is connected to the inner side of the floating device, and the fixing device is connected to the outer side of the floating device and used for fixing the position of the whole measuring platform. During measurement, a ship passes through the position above the multi-beam sonar located in the center of the fixing device, the multi-beam sonar can vertically measure bubble acoustic characteristics of the bubble wake flow center of the ship, and measurement data are timely transmitted to an upper computer of the multi-beam sonar carried on the ship for data analysis. The bubble wake flow measuring precision is improved, measured data are more accurate, the application range is wide, and installation and carrying are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bubble wake measurement, in particular to a ship bubble wake measurement platform based on a multi-beam sonar. Background Art

[0002] Whether it is a surface ship or a submarine, when sailing, due to the rotation of the propeller to beat water and the friction of the ship's hull, etc., the breaking of the sea surface waves and the entrainment of air near the waterline are caused, forming a wake field containing a large number of bubbles (especially micro-bubbles), that is, a bubble wake. The size and motion state of the bubbles existing in the bubble wake will evolve. The large bubbles will quickly rise to the sea surface and disappear after breaking, the very small bubbles will be quickly dissolved by seawater, and some micro-bubbles can exist in the wake turbulence for dozens of minutes. The wake length can usually reach 20 to 30 times the length of the ship, and some even extend dozens of kilometers away. The wake will exist for a long time in a low sea state environment. Since it is connected to the ship, tracking the wake can track the ship. At present, the wake characteristics are mainly used to detect, track and pursue surface ships. Therefore, it is very necessary to detect weak wake bubbles.

[0003] Acoustic detection is one of the most effective means for underwater detection. Studying the acoustic characteristics of various ship wakes, including the generation, duration and spatial distribution of the wake, the bubble rising speed in the wake and the scattering and absorption characteristics of the bubbles, underwater acoustic wake imaging, etc., will contribute to the research and development of higher-performance wake homing torpedoes. Using a multi-beam sonar to measure ship wakes is an effective current research method. The existing methods of using a multi-beam sonar to measure ship wakes mostly install the multi-beam sonar on the bottom of the ship or hang it on the ship's side by means of a bracket. Due to the special structure of the ship's hull, these methods cannot install the multi-beam sonar at the center position directly facing the ship wake, resulting in a large deviation in the measurement data. For this reason, the utility model provides a ship bubble wake measurement platform based on a multi-beam sonar. Summary of the Utility Model

[0004] In order to solve the data deviation problem caused by the inability to install the multi-beam sonar at the center position directly facing the ship wake, the utility model proposes the following technical solutions:

[0005] A ship bubble wake measurement platform based on a multi-beam sonar, comprising

[0006] Floating devices, there are two floating devices and the two floating devices are arranged oppositely on the sea surface;

[0007] Fixing devices, the fixing devices are connected to the floating devices and are used to fix the positions of the floating devices;

[0008] A sonar connection device, which is located below the floating device and connected between two of the floating devices;

[0009] A multi-beam sonar, which is arranged at the central position of the sonar connection device and is used to vertically measure the bubble acoustic characteristics at the center of the ship's bubble wake.

[0010] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the floating device is connected by a plurality of floating bodies 1, and the number of the floating bodies 1 is selected according to the measurement depth and the carried weight.

[0011] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the fixing device includes an anchor 5 and a cable; the anchor 5 is connected to the outside of the floating device through the cable, and the floating device is fixed by dropping the anchor, thereby fixing the position of the entire measurement platform.

[0012] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the number of the anchors 5 is determined according to the weight carried by the floating device and the weight of the sonar connection device.

[0013] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the sonar connection device includes a bracket 4 and a connecting steel cable 3; the bracket 4 is arranged between two floating devices, and the bracket 4 is connected to the inner sides of the two floating devices through the connecting steel cable 3.

[0014] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the bracket 4 is a steel frame structure composed of two parallel steel bars and reinforcing ribs connected between the two steel bars.

[0015] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the length of the connecting steel cable 3 is adjustable, and the length of the connecting steel cable 3 is adjusted according to the measurement depth.

[0016] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the length a of the bracket 4 is set to at least twice the width of the ship to be measured, and the length a of the bracket 4 is determined according to the ship width to ensure that the multi-beam sonar 2 is located at the exact center position of the bracket 4.

[0017] According to an embodiment of the present application, a ship bubble wake measurement platform based on a multi-beam sonar, the back of the multi-beam sonar 2 is provided with a plurality of screw holes, and corresponding screw holes are provided at the exact center of the bracket 4, and the multi-beam sonar 2 is fixed at the exact center of the bracket 4 through bolts.

[0018] A ship bubble wake measurement platform based on a multi-beam sonar according to an embodiment of the present application further includes a host computer of the multi-beam sonar 2. The host computer is arranged on the ship to be measured for wake, and is used to receive the measurement data of the multi-beam sonar 2 and perform data analysis.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] (1) The utility model fixes the entire measurement platform in the sea by setting a floating device and an anchoring method, sets the length a of the bracket to more than twice the width of the ship, and can measure the bubble wake characteristics of various ship types in various sea areas by adjusting the release length of the connecting steel cable.

[0021] (2) The utility model sets the multi-beam sonar in the center of the bracket, and the ship passes directly above the bracket. The multi-beam sonar can vertically measure the acoustic characteristics in the wake bubbles. Compared with the measurement method of hanging and installing the bracket to fix the multi-beam sonar, the measurement data is more accurate. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the device of a ship bubble wake measurement platform based on a multi-beam sonar.

[0023] Figure 2 It is a schematic diagram of the connection mode between the multi-beam sonar and the bracket in the embodiment of the utility model.

[0024] Figure 3 It is a front view schematic diagram of the multi-beam sonar in the embodiment of the utility model.

[0025] Figure 4 It is a back view schematic diagram of the multi-beam sonar in the embodiment of the utility model.

[0026] In the figure: 1 floating body; 2 multi-beam sonar; 3 connecting steel cable; 4 bracket; 5 ship anchor. Detailed Embodiments

[0027] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the following describes the detailed embodiments of the present utility model with reference to the accompanying drawings.

[0028] This embodiment provides a ship bubble wake measurement platform based on a multi-beam sonar, including a floating device, a fixing device, a sonar connection device and a multi-beam sonar 2.

[0029] Such as Figure 1As shown, in one solution, there are two floating devices in total, and the two floating devices are arranged oppositely on the sea surface. Each floating device is formed by connecting a plurality of floating bodies 1; the fixing device includes an anchor 5 and a cable; the anchor 5 is connected to the outside of the floating device through the cable, and the position of the entire measurement platform is fixed by dropping the anchor to fix the floating device; the sonar connection device includes a bracket 4 and a connecting steel cable 3; the bracket 4 is a steel frame structure composed of two parallel steel bars and reinforcing bars connected between the two steel bars. The length of the two parallel steel bars is a, and the length a of the bracket 4 is at least twice the width of the ship with the wake characteristics to be measured; the bracket 4 is arranged below the two floating devices and is connected to one end of the connecting steel cable 3. The length of the connecting steel cable 3 is set according to the measurement depth, and the number of the connecting steel cables 3 is determined according to the size of the bracket 4. Then, the other end of the connecting steel cable 3 is connected to the floating body 1; the multi-beam sonar 2 is installed in the center of the bracket 4, and the multi-beam sonar 2 is fixed to the bracket 4 by bolts. The upper computer of the multi-beam sonar 2 is carried on the ship with the wake bubble characteristics to be measured, and is used to receive measurement data and perform data analysis.

[0030] After the above measurement platform is installed, place the measurement platform into the sea area to be measured, and drop the anchor 5 to fix the entire measurement platform; adjust the ship's angle so that the ship's sailing direction is perpendicular to the length direction of the bracket 4, and the center position of the ship is directly opposite to the multi-beam sonar 2 located in the center of the bracket 4, so that the multi-beam sonar 2 located in the center of the bracket 4 can vertically collect the bubble acoustic characteristics of the center of the wake bubble to be measured; the multi-beam sonar 2 transmits the collected data to the upper computer of the multi-beam sonar 2 in time for data analysis. The measurement data is more accurate, the measurement range is wider, and it is suitable for measuring the acoustic characteristics of the bubble wake under various working conditions of various ships and boats.

[0031] As mentioned above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A ship bubble wake measurement platform based on multi-beam sonar, characterized in that: include A floating device, wherein the number of the floating devices is two and the two floating devices are arranged opposite to each other on the sea surface; A fixing device, the fixing device is connected to the floating device and is used to fix the position of the floating device; A sonar connection device, the sonar connection device is located below the floating device and connected between the two floating devices; A multi-beam sonar is arranged at the center of the sonar connecting device and is used to vertically measure the bubble acoustic characteristics of the center of the ship's bubble wake.

2. A ship bubble wake measurement platform based on multi-beam sonar according to claim 1, characterized in that: It also includes a host computer of the multi-beam sonar, which is arranged on the ship whose wake is to be measured and is used to receive the measurement data of the multi-beam sonar and perform data analysis.

3. A ship bubble wake measurement platform based on multi-beam sonar according to claim 1 or 2, characterized in that: The floating device is formed by connecting a plurality of floating bodies, and the number of the floating bodies is determined according to the measured depth and the weight carried.

4. A ship bubble wake measurement platform based on multi-beam sonar according to claim 1 or 2, characterized in that: The fixing device comprises an anchor and a cable; the anchor is connected to the outside of the floating device through the cable, and the floating device is fixed by anchoring, thereby fixing the position of the entire measuring platform.

5. A ship bubble wake measurement platform based on multi-beam sonar according to claim 4, characterized in that: The number of the anchors is determined according to the weight carried by the floating device and the weight of the sonar connecting device.

6. A ship bubble wake measurement platform based on multi-beam sonar according to claim 1 or 2, characterized in that: The sonar connection device comprises a bracket and a connecting steel cable; the bracket is arranged between two floating devices and the bracket is connected to the inner sides of the two floating devices through the connecting steel cable.

7. A ship bubble wake measurement platform based on multi-beam sonar according to claim 6, characterized in that: The support is a steel frame structure composed of two parallel steel bars and reinforcing bars connected between the two steel bars.

8. The ship bubble wake measurement platform based on multi-beam sonar according to claim 6, characterized in that: The length of the connecting steel cable is adjustable, and the length of the connecting steel cable is adjusted according to the measured depth.

9. The ship bubble wake measurement platform based on multi-beam sonar according to claim 6, characterized in that: The length of the bracket is set to be at least twice the width of the ship to be measured.

10. The ship bubble wake measurement platform based on multi-beam sonar according to claim 6, characterized in that: A plurality of screw holes are arranged on the back of the multi-beam sonar, and a corresponding screw hole is arranged in the center of the bracket, and the multi-beam sonar is fixed in the center of the bracket by bolts.

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