An on-board bubble wake feature detection device, a ship, and a detection method

Abstract

The present invention discloses a shipborne bubble wake feature detection device, a ship, and a detection method. The device includes: at least one laser emission module, at least one laser light source module, at least one optical transformation sensing module, a signal acquisition and processing module, a regulated power supply module, a detection result display terminal, and a total control module; which can solve the problems of poor concealment of the existing acoustic wake detection method or the complexity and bulkiness of the detection device.

Description

Technical Field

[0001] The present invention relates to the technical field of shipborne detection, and particularly to a shipborne bubble wake feature detection device, a ship, and a detection method. Background Art

[0002] During the navigation of a dynamic object on the water surface or in the water, due to the movement of the propeller causing cavitation, or the breaking of waves at the waterline and the entrainment of air, a special area containing a large number of bubbles and vortices is formed in the water area behind the dynamic object, which is called a bubble wake. The bubble wake can remain in the water for a long time, usually reaching dozens of minutes. By detecting the bubble wake, the indirect detection of the dynamic object can be achieved.

[0003] The traditional method for detecting bubble wakes is acoustic wake detection, which can be divided into active acoustic detection and passive acoustic detection. Active acoustic detection is to actively emit acoustic waves. When the acoustic waves encounter the target object, they are reflected, and the reflected echo is received, and the parameters of the target object are determined based on the reflected echo. However, active acoustic detection itself needs to emit acoustic wave signals, and the emitted acoustic wave signals are easily detected, that is, the concealment is poor. In addition, passive acoustic detection is to receive the radiation noise generated by the target object and the signals emitted by the underwater acoustic equipment, and process and calculate the received acoustic signals to obtain the relevant parameters of the target object. However, the radiation noise and the signals emitted by the underwater acoustic equipment attenuate very weakly after long-distance propagation, resulting in a low signal-to-noise ratio for passive acoustic detection. To improve the signal-to-noise ratio, more signal processing measures are required, so it is easy to cause the detection device to be complex and large, and it cannot meet the detection of underwater dynamic objects. Summary of the Invention

[0004] The present invention provides a shipborne bubble wake feature detection device, a ship, and a detection method, which can solve the problems of poor concealment or complex and large detection devices in the existing acoustic wake detection methods.

[0005] In a first aspect, a shipborne bubble wake feature detection device includes: at least one laser emission module, at least one laser light source module, at least one optical transformation sensing module, a signal acquisition and processing module, a regulated power supply module, a detection result display terminal, and a general control module;

[0006] The laser light source module is connected to the laser emission module through a through-hull optical cable; the optical transformation sensing module is electrically connected to the signal acquisition and processing module through a through-hull cable; the regulated power supply module is electrically connected to the signal acquisition and processing module and the optical transformation sensing module respectively through the through-hull cable; the detection result display terminal is electrically connected to the signal acquisition and processing module through the through-hull cable; the general control module is electrically connected to the laser emission module, the laser light source module, the optical transformation sensing module, the signal acquisition and processing module, the regulated power supply module, and the detection result display terminal respectively through the through-hull cable.

[0007] In a second aspect, a ship uses any one of the above-mentioned on-board bubble wake feature detection devices. The laser emission module and the optical transformation sensing module of the on-board bubble wake feature detection device are both located on the outer wall of the cabin at the bow of the ship;

[0008] The laser light source module, the signal acquisition and processing module, and the regulated power supply module of the on-board bubble wake feature detection device are located inside the cabin at the bow of the ship;

[0009] The detection result display terminal and the general control module of the on-board bubble wake feature detection device are located inside the ship's command cabin.

[0010] In a third aspect, a method for detecting bubble wake features uses any one of the above-mentioned on-board bubble wake feature detection devices, and includes:

[0011] Emitting laser light;

[0012] Receiving an optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module; the emission direction of the expanded laser beam emitted by the laser emission module is the same as the navigation direction of the ship;

[0013] Performing spatial frequency spectrum transformation and optoelectronic conversion on the received optical signal to obtain a corresponding electrical signal;

[0014] Processing the electrical signal to obtain a detection result;

[0015] Comparing the detection result with a preset threshold to determine whether there is a bubble wake of a dynamic object in the detection area, and obtaining final result display data; if the detection result exceeds the preset threshold, it is determined that there is a bubble wake of a dynamic object in the detection area;

[0016] Displaying the final result display data on the detection result display terminal.

[0017] A shipborne bubble wake feature detection device, a ship, and a detection method provided by the present invention. The device generates a laser beam through a laser light source module, and after being expanded by a laser emission module, it is emitted. If the expanded laser beam encounters a bubble wake, a bubble group scattering effect will occur. If it does not encounter a bubble wake, it will continue to propagate towards the detection area. The optical transformation sensing module receives the forward-scattered optical signal or the forward-propagating optical signal, performs a spatial frequency spectrum transformation on the received optical signal, conducts a spatial recognition and analysis of the optical signal, and then converts the transformed optical signal into an electrical signal. The signal acquisition and processing module processes the electrical signal accordingly to obtain a detection result, and finally displays the detection result and the azimuth information of the dynamic target on a display. Compared with the existing acoustic wake detection method, the laser beam is not easily intercepted, has better concealment, the device has a simple structure, is more flexible to install, and has a wider range of use. Moreover, compared with using sound waves for detection, the present invention utilizes the optical effect of bubble group scattering when the laser beam encounters a bubble wake, and can judge the azimuth information of the dynamic target more accurately, with higher sensitivity and stability. For a ship equipped with the above shipborne bubble wake feature detection device, installing the laser emission module and the optical transformation sensing module at the bow of the ship can detect the dynamic target in front of the ship during navigation, avoiding interference from the bubble wake generated by the ship itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 6 is a schematic structural diagram of the first shipborne bubble wake feature detection device provided by an embodiment of the present specification;

[0019] Figure 2 FIG. 10 is a schematic structural diagram of the second shipborne bubble wake feature detection device provided by an embodiment of the present specification;

[0020] Figure 3 FIG. 14 is a schematic structural diagram of the first ship provided by an embodiment of the present specification;

[0021] Figure 4 FIG. 18 is a schematic structural diagram of the second ship provided by an embodiment of the present specification;

[0022] Figure 5 FIG. 22 is a flowchart of a bubble wake feature detection method provided by an embodiment of the present specification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present specification are detailed descriptions of the technical solutions of the embodiments of the present specification, rather than limitations on the technical solutions of the present specification. Without conflict, the technical features in the embodiments of the present specification and the embodiments can be combined with each other.

[0024] Traditional bubble wake detection methods use acoustic wake detection, which can be divided into active acoustic detection and passive acoustic detection. Active acoustic detection actively emits acoustic waves. When the acoustic waves encounter a target object, they are reflected, and the reflected echo is received. The parameters of the target object are determined based on the reflected echo. However, active acoustic detection itself needs to emit acoustic wave signals, and the emitted acoustic wave signals are easily detected, that is, the concealment is poor. In addition, passive acoustic detection is to receive the radiation noise generated by the target object and the signals emitted by underwater acoustic devices, and process and calculate the received acoustic signals to obtain the relevant parameters of the target object. However, the radiation noise and the signals emitted by underwater acoustic devices attenuate very weakly after long-distance propagation, resulting in a low signal-to-noise ratio for passive acoustic detection. To improve the signal-to-noise ratio, more signal processing measures are required, which easily lead to a complex and large detection device. Therefore, it cannot meet the detection of underwater dynamic target objects.

[0025] Theoretical and experimental studies have shown that the presence of bubble characteristics will change the propagation characteristics of light in the wake region. Specifically, when an expanded laser beam propagates in water, due to the existence of the bubble group scattering effect, the spatial spectral width of the forward-scattered light beam will become narrower. Combining the structure and shape characteristics of surface ships, based on the optical scattering characteristics of bubble wakes, the present invention proposes a shipborne bubble wake characteristic detection device, a ship equipped with this device, and a bubble wake characteristic detection method using this device, which can effectively detect the bubble wake characteristics of dynamic target objects on the water surface and in the water to achieve the purpose of detecting the azimuth of dynamic target objects.

[0026] Specifically, in the first aspect, Figure 1 This is a schematic structural diagram of the first shipborne bubble wake characteristic detection device provided in the embodiments of this specification. As Figure 1 shown, the shipborne bubble wake characteristic detection device provided in this embodiment includes: a laser emission module 1, a laser light source module 2, an optical transformation sensing module 3, a signal acquisition and processing module 4, a regulated power supply module 5, a detection result display terminal 6, and a total control module 7. The total control module 7 is electrically connected to the laser emission module 1, the laser light source module 2, the optical transformation sensing module 3, the signal acquisition and processing module 4, the regulated power supply module 5, and the detection result display terminal 6 through a through-hull cable EC ( Figure 1 shown by the solid line). The total control module 7 plays a control role for each of the other modules, controlling turning on, turning off, parameter setting, or parameter modification, etc. The present application does not make specific limitations.

[0027] Continue to refer to Figure 1 , the laser light source module 2 and the laser emission module 1 are connected through a through-hull optical cable OC ( Figure 1... are connected by a dotted line (as shown by the dotted line); the laser light source module 2 can use a blue-green solid-state laser with a wavelength of 532 nm. The beam quality of the blue-green solid-state laser with a wavelength of 532 nm is relatively high, the attenuation of the beam in water is small, and the device volume is also small. The laser light source module 2 generates a laser beam, which is transmitted to the laser emission module 1 through the through-hull optical cable OC. The laser emission module 1 expands the laser beam accordingly and then emits it into the water. The optical transformation sensing module 3 and the signal acquisition and processing module 4 are electrically connected by the through-hull cable EC; the signal acquisition and processing module 4 can use a DSP processor.

[0028] Continue to refer to Figure 1 ... the optical transformation sensing module 3 includes an optical signal receiving and transforming sub-module 31 and a photoelectric conversion sub-module 32. The photoelectric conversion sub-module 32 is electrically connected to the signal acquisition and processing module 4 through the through-hull cable EC. The direction in which the laser emission module 1 emits the expanded laser beam generally faces the navigation direction of the ship carrying the detection device provided in this embodiment. The area in front of the ship's navigation is the detection area. During the propagation of the expanded laser beam in the detection area, if it encounters a bubble wake, the bubble group scattering effect will occur. The optical signal receiving and transforming sub-module 31 can be used to receive the forward-scattered light beam propagating in the direction of the ship's navigation. The forward-scattered light beam can be regarded as the scattered optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module 1. It is easy to understand that the "same" here is not the same in a strict sense, but only generally the same. If the expanded laser beam does not encounter a bubble wake in the detection area, the optical signal received by the optical signal receiving and transforming sub-module 31 is only the optical signal propagating forward emitted by the laser emission module 1. The optical signal receiving and transforming sub-module 31 can perform a spatial frequency spectrum transformation on the received optical signal; the spatial frequency spectrum transformation can use an optical spatial Fourier transform; the spatial frequency spectrum transformation is a process of identifying, analyzing, and integrating the spatial information of the optical signal, and can analyze the position information of the dynamic target generating the bubble wake. The photoelectric conversion sub-module 32 is used to convert the optical signal into an electrical signal. It should be noted that the optical signal receiving and transforming sub-module 31 and the photoelectric conversion sub-module 32 can be purchased on the existing market. The laser emission module 1 and the optical signal receiving and transforming sub-module 31 are optically coaxial, so that the optical signal receiving and transforming sub-module 31 can perform an accurate spatial frequency spectrum transformation on the received optical signal.

[0029] Continue to refer to Figure 1, the regulated power supply module 5 is electrically connected to the signal acquisition and processing module 4 and the optical transformation sensing module 3 respectively through the through-hull cable EC. The regulated power supply module 5 mainly provides a stable voltage supply for the optical transformation sensing module 3 and the signal acquisition and processing module 4. The electrical signal output by the optoelectronic conversion sub-module 32 is transmitted to the signal acquisition and processing module 4, and the signal acquisition and processing module 4 processes the electrical signal accordingly to obtain the detection result. For example, the processed electrical signal can be in the form of an optical scattering spectrum to characterize the detection result, and then the detection result is sent to the detection result display terminal 6 for display. Specifically, the detection result display terminal 6 can include a display 61 and a detection result judgment sub-module 62; a preset threshold is set in the detection result judgment sub-module 62, and the preset threshold is obtained by taking the reciprocal of the optical scattering spectrum width. The optical scattering spectrum for calculating the preset threshold is the optical scattering spectrum corresponding to the optical signal that has not undergone the bubble group scattering effect, and the preset threshold can be set differently according to specific environments such as different water areas. If the value obtained by taking the reciprocal of the optical scattering spectrum width of the detection result exceeds the preset threshold, it can be determined that there is a bubble wake of a dynamic target in the detection area, and the azimuth information of the dynamic target can be obtained based on the azimuth information of the bubble wake. The detection result judgment sub-module 62 finally outputs the final result display data. If the azimuth information of the dynamic target is detected, the final result display data includes the azimuth information of the dynamic target, and the final result display data is sent to the display 61 for display. The detection result judgment sub-module 62 is electrically connected to the signal acquisition and processing module 4 through the through-hull cable EC, and the detection result judgment sub-module 62 is commercially available on the existing market.

[0030] It should be noted that the through-hull optical cable OC and the through-hull cable EC can be of the same conventional type used on surface ships, which can improve the reliability and compatibility of the shipborne bubble wake feature detection device.

[0031] The on - ship bubble wake feature detection device provided in this embodiment generates a laser beam through the laser light source module 2. After being expanded by the laser emission module 1, the laser beam is emitted. If the expanded laser beam encounters a bubble wake, the bubble group scattering effect will occur. If it does not encounter a bubble wake, it will continue to propagate towards the detection area. The optical signal receiving and transforming sub - module 31 receives the forward - scattered optical signal or the forward - propagating optical signal, performs a spatial frequency spectrum transformation on the received optical signal, and conducts spatial recognition and analysis on the optical signal. The optoelectronic conversion sub - module 32 converts the transformed optical signal into an electrical signal. The signal acquisition and processing module 4 processes the electrical signal to obtain a detection result. The detection result judgment sub - module 62 compares and analyzes the detection result with a preset threshold value, and can obtain the azimuth information of the bubble wake generated by the dynamic target. Further, the azimuth information of the dynamic target can be analyzed. Finally, the detection result and the azimuth information of the dynamic target are displayed on the display 61. Compared with the existing acoustic wake detection method, the laser beam is not easily intercepted, has good concealment, the device structure is simple, the installation is relatively flexible, and the application range is relatively wide. Moreover, compared with using acoustic waves for detection, the present invention utilizes the optical effect of the laser beam encountering a bubble wake and generating bubble group scattering, and the judgment of the azimuth information of the dynamic target is relatively accurate, with high sensitivity and stability.

[0032] Figure 2 This is the structural schematic diagram of the second on - ship bubble wake feature detection device provided in the embodiments of this specification. As Figure 2 shown, for the on - ship bubble wake feature detection device provided in this embodiment, the number of the laser emission module 1, the laser light source module 2, and the optical transformation sensing module 3 is 3 each. The number of the laser emission module 1, the laser light source module 2, and the optical transformation sensing module 3 is not limited to Figure 1 and Figure 2 the number shown. The number can be 2 or more, and this application does not make specific limitations. Figure 2 The shown laser emission module 1, laser light source module 2, and optical transformation sensing module 3 can be in one - to - one correspondence. The 3 laser emission modules 1 and 3 optical transformation sensing modules 3 can be set at different positions according to different detection requirements, and a wider range of detection can be carried out in space.

[0033] In the second aspect, Figure 3 This is the structural schematic diagram of the first ship provided in the embodiments of this specification. As Figure 3 shown, this embodiment provides a ship using any of the above - mentioned on - ship bubble wake feature detection devices, Figure 3The dashed line represents the water surface, and the dotted line represents the cable passing through the cabin. Both the laser emission module 1 and the optical transformation sensing module 3 of the shipborne bubble wake feature detection device are located on the outer wall of the cabin at the bow 01 of the ship. Installing the laser emission module 1 and the optical transformation sensing module 3 at the bow 01 of the ship can enable the optical transformation sensing module 3 to emit the expanded laser beam in the direction of the ship's navigation. The optical transformation sensing module 3 receives the forward scattered light beam and the expanded laser beam that has not been scattered. The shipborne bubble wake feature detection device can then detect dynamic objects in front of the ship's navigation, such as Figure 3 As shown, the bubble wake TB generated by a certain dynamic object in front of the ship's navigation; in addition, installing the laser emission module 1 and the optical transformation sensing module 3 at the bow 01 of the ship can also avoid being interfered by the bubble wake generated by the ship itself. The laser emission module 1 and the optical transformation sensing module 3 can be embedded in the outer wall of the cabin at the bow 01 of the ship. Then, the streamline shape of the outer shape of the laser emission module 1 and the optical transformation sensing module 3 can be the same as that of the outer cabin wall surface of the ship's bow, which can reduce the impact on the hydrodynamic and acoustic performance of the ship.

[0034] Continue to refer to Figure 3 , the laser light source module 2, the signal acquisition and processing module 4, and the regulated power supply module 5 of the shipborne bubble wake feature detection device can be located inside the cabin at the bow of the ship; the detection result display terminal 6 and the total control module 7 of the shipborne bubble wake feature detection device can be located inside the ship's command cabin.

[0035] It should be noted that since Figure 3 There are many connection relationships between the various modules shown, and the through-cabin cables connecting the various modules to the total control module 7 are not shown.

[0036] Figure 4 This is the second schematic diagram of the ship structure provided by the embodiment of this specification. As shown in Figure 4As shown, the number of both the laser emission module 1 and the optical transformation sensing module 3 is 3, which are respectively located on the outer wall of the left cabin, the outer wall of the middle cabin, and the outer wall of the right cabin at the bow 01 of the ship; the number of the laser light source modules 2 is 3, which are respectively located inside the left cabin, inside the middle cabin, and inside the right cabin at the bow 01 of the ship. The 3 laser emission modules 1 can be distributed in a straight line or arranged irregularly, as long as they are generally located on the outer wall of the left cabin, the outer wall of the middle cabin, and the outer wall of the right cabin at the bow 01 of the ship respectively. The 3 laser light source modules 2 can respectively provide laser sources for the 3 laser emission modules 1. The 3 laser emission modules 1 can respectively emit extended laser beams in three direction ranges. The 3 optical transformation sensing modules 3 can respectively receive the forward scattered light signals and the non-scattered extended laser beams in 3 directions, and respectively perform spatial frequency spectrum transformation and optoelectronic conversion on the 3 optical signals. Then, the signal acquisition and processing module 4 integrates and processes the 3 signals to obtain a detection result, and detects the bubble wake TB generated by the dynamic target in front of the ship's navigation. Figure 3 and Figure 4 The shown bubble wake TB is only schematic.

[0037] For the ship provided in this embodiment, the above-mentioned on-ship bubble wake feature detection device is installed on the ship, and the laser emission module 1 and the optical transformation sensing module 3 are installed at the bow 01 of the ship, which can detect the dynamic target in front of the ship's navigation and avoid being interfered by the bubble wake generated by the ship itself. By setting multiple laser emission modules 1, laser light source modules 2, and optical transformation sensing modules 3, the dynamic target in front of the ship's navigation can be detected in multiple directions.

[0038] In the third aspect, Figure 5 is a flowchart of a bubble wake feature detection method provided by an embodiment of this specification. As Figure 5 shown, this embodiment provides a bubble wake feature detection method, which uses any one of the above-mentioned on-ship bubble wake feature detection devices, and includes the following steps:

[0039] S1: Emit laser; the laser light source module generates a laser beam, which is emitted after being expanded by the laser emission module.

[0040] S2: Receive the optical signal propagating in the emission direction of the extended laser beam emitted by the laser emission module; the emission direction of the extended laser beam emitted by the laser emission module is the same as the ship's navigation direction; the'same' here is only generally the same, not the same in a strict sense. As the laser emission module continuously emits extended laser beams and the ship continues to sail forward, the optical transformation sensing module can receive the scattered optical signal or the non-scattered optical signal, and these optical signals are all propagating in a direction generally the same as the ship's navigation direction. Therefore, the optical transformation sensing module receives the optical signal in front of the ship's navigation.

[0041] S3: Perform spatial spectrum transformation and optoelectronic conversion on the received optical signal to obtain the corresponding electrical signal; the spatial spectrum transformation uses optical spatial Fourier transform. Perform spatial spectrum transformation and optoelectronic conversion on the received forward scattered optical signal or the forward propagating optical signal that has not undergone scattering to obtain the corresponding electrical signal.

[0042] S4: Process the electrical signal to obtain the detection result. Here, the processing can be to form an optical scatter spectrum based on the electrical signal.

[0043] S5: Compare the detection result with a preset threshold to determine whether there is a bubble wake of a dynamic object in the detection area; take the reciprocal of the optical scatter spectrum width in the detection result and compare it with the preset threshold. If the detection result exceeds the preset threshold, it is determined that there is a bubble wake of a dynamic object in the detection area, and the final result display data is obtained; if the detection result does not exceed the preset threshold, it can be determined that there is no bubble wake of a dynamic object in the detection area, that is, there is no dynamic object. If there is a bubble wake of a dynamic object in the detection area, the azimuth information of the dynamic object can be judged according to the azimuth information of the bubble wake, and the final result display data includes the detected azimuth information of the dynamic object.

[0044] S6: Display the final result display data on the detection result display terminal. If there is a dynamic object, the icon of the dynamic object can be displayed at the corresponding position on the screen of the display. If there is no dynamic object, the icon of the dynamic object is not displayed on the screen of the display.

[0045] Step S2 can further include:

[0046] According to the propagation path, divide the optical signal with the same emission direction as the laser emission module into 3 paths for classification reception. If there are 3 laser emission modules 1, laser light source modules 2, and optical transformation sensing modules 3 respectively, the optical signals received by the optical transformation sensing module can be divided into three paths for reception respectively.

[0047] Step S3 further includes:

[0048] Perform spatial spectrum transformation and optoelectronic conversion on the 3 paths of optical signals respectively to obtain 3 groups of corresponding electrical signals. The azimuth information of each signal is already carried in the 3 paths of electrical signals.

[0049] Step S4 further includes:

[0050] Process the 3 groups of electrical signals respectively to obtain 3 groups of detection results; the 3 groups of detection results carry their respective azimuth information.

[0051] This specification is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the specification. It should be understood that each flow and / or block in the flowchart and / or block diagram, and combinations of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device generate an apparatus for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or in one or more blocks.

[0052] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction apparatus that implements the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or in one or more blocks.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows Figure 1 one or more flows and / or blocks Figure 1 or in one or more blocks.

[0054] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of this specification.

[0055] Obviously, those skilled in the art can make various changes and variations to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. An on-board bubble wake feature detection device, characterized in that, Including: At least one laser emission module (1), at least one laser light source module (2), at least one optical transformation sensing module (3), a signal acquisition and processing module (4), a regulated power supply module (5), a detection result display terminal (6), and a total control module (7); The laser light source module (2) is connected to the laser emission module (1) through a through-hull optical cable; the optical transformation sensing module (3) is electrically connected to the signal acquisition and processing module (4) through a through-hull cable; the regulated power supply module (5) is electrically connected to the signal acquisition and processing module (4) and the optical transformation sensing module (3) respectively through the through-hull cable; the detection result display terminal (6) is electrically connected to the signal acquisition and processing module (4) through the through-hull cable; the total control module (7) is electrically connected to the laser emission module (1), the laser light source module (2), the optical transformation sensing module (3), the signal acquisition and processing module (4), the regulated power supply module (5), and the detection result display terminal (6) respectively through the through-hull cable; The detection result display terminal (6) includes a display (61) and a detection result judgment sub-module (62); a preset threshold is set in the detection result judgment sub-module (62), and if the detection result exceeds the preset threshold, it is determined that there is a bubble wake of a dynamic target in the detection area; The optical transformation sensing module (3) includes an optical signal receiving and transforming sub-module (31) and a photoelectric conversion sub-module (32); the optical signal receiving and transforming sub-module (31) is used to receive an optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module (1), and perform a spatial frequency spectrum transformation on the received optical signal; The laser emission module (1) and the optical signal receiving and transforming sub-module (31) are optically coaxial, the emission direction of the expanded laser beam emitted by the laser emission module (1) is towards the navigation direction of the ship carrying the shipborne bubble wake feature detection device, the optical signal receiving and transforming sub-module (31) is used to receive the forward scattering beam propagating towards the navigation direction of the ship, and the forward scattering beam is a scattered optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module (1). Among them, both the laser emission module (1) and the optical signal receiving and transforming sub-module (31) are located on the outer wall of the ship's cabin at the bow of the ship; The numbers of the laser emission module (1), the laser light source module (2), and the optical transformation sensing module (3) are all 3, and the laser emission module (1), the laser light source module (2), and the optical transformation sensing module (3) are in one-to-one correspondence.

2. The on-board bubble wake feature detection device according to claim 1, wherein The laser light source module (2) uses a solid-state laser with a wavelength of 532 nm.

3. The on-ship bubble wake feature detection device according to claim 1, characterized in that The signal acquisition and processing module (4) uses a DSP processor.

4. A ship, which adopts the on-board bubble wake feature detection device described in any one of claims 1-3, is characterized in that, Both the laser emission module (1) and the optical transformation sensing module (3) of the shipborne bubble wake feature detection device are located on the outer wall of the ship's cabin at the bow (01) of the ship; The laser light source module (2), the signal acquisition and processing module (4), and the regulated power supply module (5) of the shipborne bubble wake feature detection device are located inside the cabin at the bow of the ship; The detection result display terminal (6) and the total control module (7) of the shipborne bubble wake feature detection device are located inside the ship's command cabin.

5. The ship according to claim 4, characterized in that, The number of the laser emission modules (1) and the optical transformation and sensing modules (3) is 3 each, and they are respectively located on the outer wall of the left cabin, the outer wall of the middle cabin, and the outer wall of the right cabin at the bow (01) of the ship; The number of the laser light source modules (2) is 3, and they are respectively located inside the left cabin, the middle cabin, and the right cabin at the bow (01) of the ship.

6. A method for detecting bubble wake characteristics, using the on-board bubble wake characteristic detection device according to any one of claims 1-3, characterized in that, It includes: Emitting laser; Receiving the optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module; The emission direction of the expanded laser beam emitted by the laser emission module is the same as the sailing direction of the ship; Performing spatial frequency spectrum transformation and optoelectronic conversion on the received optical signal to obtain the corresponding electrical signal; Processing the electrical signal to obtain the detection result; Comparing the detection result with a preset threshold to determine whether there is a bubble wake of a dynamic target in the detection area, and obtaining the final result display data; If the detection result exceeds the preset threshold, it is determined that there is a bubble wake of a dynamic target in the detection area; Displaying the final result display data on the detection result display terminal.

7. The bubble wake feature detection method according to claim 6, wherein The step of receiving the optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module further includes: Dividing the optical signal propagating in the emission direction of the expanded laser beam emitted by the laser emission module into 3 paths for classification reception according to the propagation path; The step of performing spatial frequency spectrum transformation and optoelectronic conversion on the received optical signal to obtain the corresponding electrical signal further includes: Performing spatial frequency spectrum transformation and optoelectronic conversion on the 3 paths of the optical signal respectively to obtain 3 groups of corresponding electrical signals; The step of processing the electrical signal to obtain the detection result further includes: Processing the 3 groups of the electrical signals respectively to obtain 3 groups of detection results; the 3 groups of the detection results respectively carry their own azimuth information.

Images