Wake flow bubble tracking and collecting device
By adopting the idea of light sections in the ship's stern bubble tracking and acquisition device, light sections are generated in the dark environment, which solves the problem that the existing technology is difficult to effectively track and collect ship's stern bubbles, and realizes high-precision wake bubble detection, which is suitable for different speed conditions.
Patent Information
- Application Number
- CN202421486645.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The prior art is difficult to effectively track and collect ship stern bubbles, especially in the context of high-brightness oceans, making it difficult for high-definition cameras to collect identifiable wake bubbles.
A floating-type wake bubble tracking and acquisition device based on a camera is designed, and light-sections are generated in a dark environment using the idea of light-sections. Only bubbles illuminated by light-sections are collected into the image, reducing the depth of field and reducing bubble overlap.
It improves the accuracy of wake bubble detection, reduces the difficulty of image processing, and is suitable for wake bubble generation law detection under different speed conditions. It has a simple device and low cost, which does not affect ship performance.
Smart Images
Figure CN222652520U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ship wake bubbles, in particular to a device for tracking and collecting wake bubbles of ships at sea. Background Art
[0002] Different types of ships will inevitably produce a distinctive bubble wake field at the stern of the ship when sailing. Since the bubble size in the bubble wake field is micrometer-level, except for a small part that converges and floats up, most of the tiny bubbles will stay in the sea area behind the ship for a long time, making the sound, light, magnetism and other physical properties of the ship wake area significantly different from those of the surrounding seawater. In order to realize the study of the change process of the wake bubble, it is necessary to track and collect the wake bubble.
[0003] At present, the main means of detecting wake bubbles include image sonar, high-definition camera and laser. Among them, image sonar cannot see the specific changes of a single bubble or multiple bubbles, but can only observe the change law of bubbles in the bubble wake field on a large scale. The data obtained is difficult to reveal the actual movement state of the bubble; the instruments and equipment used in the laser measurement method are generally easy to implement in the laboratory, but more supporting equipment is required in the actual marine environment, and the experimental cost is high, which is not suitable for offshore collection; while high-definition cameras can not only directly capture the actual change process of bubbles, but also the image processing method is relatively mature. Therefore, the collection of offshore wake bubbles is suitable for high-definition camera shooting. The use of high-definition cameras to collect wake bubbles requires a suitable light background, but the brightness of the ocean background is too high, making it difficult to collect identifiable wake bubbles. It is necessary to design corresponding equipment to create a relatively dark light environment to ensure that the high-definition camera can collect identifiable wake bubbles.
[0004] In view of the above situation, the utility model proposes a buoy-type wake bubble tracking and collection device based on a camera. Utility Model Content
[0005] In order to overcome the defects of the existing wake bubble collection and detection technology, the utility model proposes a buoy-type wake bubble tracking and collection device based on a camera. The ship wake bubble contains a large number of micron-level bubble groups. If the depth of field is too large, the bubbles on the image collected by the camera will overlap to a large extent, increasing the difficulty of image processing; if the depth of field is too large, it will also cause large errors due to the inconsistent magnification ratio of bubbles at different depths on the image. In order to improve the accuracy of bubble detection as much as possible, the depth of field should be reduced as much as possible, but the depth of field should be greater than 2 to 3 times the diameter of the measured bubble, and the minimum should not be less than 100 microns. The utility model adopts the idea of light section to collect images of micron-level bubble groups, that is, a light section is generated in a dark environment, and only the bubbles illuminated by the light section will be collected in the image. The thinner the light section, the smaller the depth of field, and the lower the degree of bubble overlap.
[0006] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:
[0007] A wake bubble tracking and collection device comprises a buoy darkroom 2, an annular buoy 3, a strong light flashlight and a camera.
[0008] The float darkroom 2 is used to provide a dark environment for collecting images of micron-level bubble groups; the float darkroom 2 is formed as a cylindrical shell with a closed top and an open bottom, and a plurality of circular holes 1 are opened on the top side wall along the circumferential direction to ensure that the air pressure inside and outside the float is the same.
[0009] The lower part of the buoy darkroom 2 is circumferentially cut with a plurality of slits 4 at equal intervals to generate a light section.
[0010] The central through hole of the annular buoy 3 is sleeved outside the buoy dark chamber 2 and is located above the slit 4, so that the buoy dark chamber 2 can maintain balance underwater.
[0011] The high-intensity flashlight is a waterproof high-intensity flashlight used to provide a light source; a plurality of the high-intensity flashlights are arranged at equal intervals outside the buoy darkroom 2 , and the light sources of the high-intensity flashlights are parallel to the slit 4 .
[0012] The camera is a waterproof camera, which is fixed at the center of the buoy darkroom 2 and below the slit 4 to collect images of the micro bubble group upwards.
[0013] Furthermore, a trumpet-shaped opening 6 is provided at the bottom of the buoy darkroom 2 to expand the effective area of the buoy darkroom and ensure that more bubbles enter the buoy darkroom 2, so as to observe the bubbles.
[0014] Furthermore, a clamp is provided on the annular buoy 3, which is installed at different positions of the buoy darkroom 2 through the clamp, so as to facilitate adjustment of the depth of the buoy darkroom 2 extending into the water.
[0015] Furthermore, the iron sheet 5 is adhered to the slit 4 and the size of the slit 4 along the vertical direction of the buoy darkroom 2 is adjusted by adjusting the coverage area of the iron sheet 5 on the slit 4, thereby adapting to different light source conditions.
[0016] Furthermore, the distance between the high-intensity flashlight and the slit 4 is adjusted to generate different light sections.
[0017] Furthermore, there are three slits 4 in total, and a high-intensity flashlight is correspondingly arranged for each slit 4 .
[0018] The beneficial effects of the utility model are:
[0019] 1) The utility model is simple to manufacture and low in cost. The device has good wave-following performance and strong stability, and can be used to detect the generation law of wake bubbles under different speed conditions;
[0020] 2) The slit width on the device of the utility model is adjustable, which can produce different light sections and collect bubble groups of different diameters, with a wide range of applications and high precision;
[0021] 3) The experimental cost of the device described in the utility model is low, it is a peripheral device, and will not cause adverse effects on various performances of the ship;
[0022] 4) The device of the utility model has easy-to-obtain raw materials, ingenious structure, simple manufacturing process, convenient processing, simple operation and use, and the special buoy structure can also carry other acquisition equipment besides the camera, and has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 The present invention is a schematic structural diagram of a wake bubble tracking and collection device designed for the utility model.
[0024] Figure 2 It is a front view of the device.
[0025] Figure 3 1 and 2 are top and bottom views of the device; (a) is a top view, and (b) is a bottom view.
[0026] Figure 4 Schematic diagram for installation use.
[0027] In the figure: 1 circular hole; 2 darkroom of float; 3 annular buoy; 4 slit; 5 iron sheet; 6 trumpet-shaped opening. DETAILED DESCRIPTION
[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0029] like Figure 1-2 As shown, this embodiment provides a wake bubble tracking and collection device, including a buoy darkroom 2, an annular buoy 3, a strong light flashlight and a camera.
[0030] The buoy dark chamber 2 is a cylindrical shell structure with a closed top and an open bottom, and a plurality of circular holes 1 are opened in the circumferential direction on the top side wall to ensure that the air pressure inside and outside the buoy is the same; a trumpet-shaped opening 6 is provided at the bottom end of the buoy dark chamber 2 to expand the effective area of the buoy dark chamber and ensure that more wake bubbles enter the buoy dark chamber.
[0031] The lower part of the buoy darkroom 2 is circumferentially cut with three slits 4 at equal intervals, and an iron sheet 5 is provided on the slit 4. The size of the slit 4 along the vertical direction of the buoy darkroom 2 is adjusted by covering the slit 4 with the iron sheet 5.
[0032] The central through hole of the annular buoy 3 is sleeved outside the buoy darkroom 2 and is located above the slit 4, and is used to adjust the water depth of the buoy darkroom and ensure the stability of the buoy.
[0033] There are three strong light flashlights in total, which are evenly spaced outside the buoy darkroom 2 through a metal frame, and the light source of each strong light flashlight is parallel to its corresponding slit 4.
[0034] The camera is fixed at the center of the buoy darkroom 2 and below the slit 4 through a metal frame to collect images of the micro bubble group upwards.
[0035] Implementation method: Fix the camera at the center of the buoy darkroom 2 and below the slit 4, so that it can collect the tiny bubbles of the ship's wake upward, and install waterproof strong light flashlights at equal intervals on the periphery of the slit 4. By adjusting the size of the slit 4 along the vertical direction of the buoy darkroom 2 and the installation distance of the strong light flashlight, it can produce the required light section. After setting, adjust the height of the annular buoy 3 and place it in the water. The top of the buoy is connected to the stern of the ship, such as Figure 4 As shown in the figure, the ship starts sailing, and the propeller speed is increased from zero to determine and record the propeller cavitation speed. Based on this speed, different propeller speed sailing conditions are set and collected, so that the generation law of wake bubbles under different speed conditions can be detected.
[0036] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and concept of the utility model within the technical scope disclosed by the utility model, which should be covered by the protection scope of the utility model.
Claims
1. A wake bubble tracking and collection device, characterized in that: The device includes a buoy darkroom, a ring buoy, a strong flashlight and a camera; The buoy darkroom is formed as a cylindrical shell with a closed top and an open bottom, and a plurality of circular holes are opened in the circumferential direction on the top side wall to ensure that the air pressure inside and outside the buoy is the same; The lower part of the buoy darkroom is provided with a plurality of slits cut at equal intervals along the circumferential direction for generating light sections; The central through hole of the annular buoy is sleeved outside the buoy dark room and is located above the slit, so that the buoy dark room can maintain balance underwater; There are multiple strong light flashlights, which are evenly spaced outside the darkroom of the float, and the light sources of the strong light flashlights are parallel to the slit; The camera is fixed at the center of the dark chamber of the float and is located below the slit to collect images of the micro bubble group upwards.
2. A wake bubble tracking and collection device according to claim 1, characterized in that: A trumpet-shaped opening for expanding the effective area of the buoy dark chamber is provided at the bottom end of the buoy dark chamber.
3. A wake bubble tracking and collection device according to claim 1 or 2, characterized in that: The annular buoy is provided with a clamp, which is installed at different positions of the buoy darkroom through the clamp, so as to facilitate adjustment of the depth of the buoy darkroom extending into the water.
4. A wake bubble tracking and collection device according to claim 1 or 2, characterized in that: The slit is bonded with an iron sheet, and the size of the slit along the vertical direction of the buoy darkroom is adjusted by adjusting the coverage area of the iron sheet on the slit, thereby adapting to different light source conditions.
5. A wake bubble tracking and collection device according to claim 3, characterized in that: The slit is bonded with an iron sheet, and the size of the slit along the vertical direction of the buoy darkroom is adjusted by adjusting the coverage area of the iron sheet on the slit, thereby adapting to different light source conditions.
6. A wake bubble tracking and collection device according to claim 1, 2 or 5, characterized in that: The distance between the strong light flashlight and the slit is adjusted to generate different light sections.
7. A wake bubble tracking and collection device according to claim 1, 2 or 5, characterized in that: There are three slits in total, and a strong light flashlight is arranged corresponding to each slit.