An underwater high-speed photography device

Abstract

The application provides an underwater high-speed photographing device, which comprises a watertight camera barrel, a support for fixing a main body of a camera in the watertight camera barrel, a first clamping device, a second clamping device, a first automatic rotating device and a second automatic rotating device are installed on the support; the first clamping device is used for circumferentially clamping a focusing ring of the camera; the first automatic rotating device is used for rotating the first clamping device, so that the focusing ring rotates; the second clamping device is used for circumferentially clamping an aperture ring of the camera; the second automatic rotating device is used for rotating the second clamping device, so that the aperture ring rotates; and a view window is arranged at the front end of the watertight camera barrel, which facilitates photographing of a lens of the camera. The application designs a high-speed photographing device, which has an underwater self-focusing function and overcomes the problem that a traditional underwater high-speed photographing device cannot automatically focus due to the mismatch between a camera and a lens.

Description

Technical Field

[0001] This invention relates to the field of underwater observation technology, specifically to an underwater high-speed photography device. Background Technology

[0002] To verify the water immersion performance of structures and obtain reliable data, it is often necessary to conduct water immersion tests on models or actual objects. Currently, supercavitation immersion tests are mainly carried out under laboratory conditions. Outdoor tests often cannot observe the generation, development, and collapse of supercavitation after immersion. Even under laboratory conditions, without a dedicated observation window in the test tank, it is impossible to obtain images of supercavitation evolution and water ballistic data. Even with customized high-speed underwater cameras, real-time focusing is not possible after changing lenses from different brands, thus affecting image quality and test efficiency. Summary of the Invention

[0003] To address the aforementioned technical issues, an underwater high-speed photography device is provided, which overcomes the problem of traditional underwater high-speed camera devices being unable to autofocus. Furthermore, by utilizing deep learning methods to monitor supercavitation in real time, it automatically controls the focusing equipment to autonomously improve the imaging quality of supercavitation, thus contributing to in-depth research on the process of structures entering the water.

[0004] The technical means employed in this invention are as follows:

[0005] An underwater high-speed photography device includes a watertight camera tube, the watertight camera tube having a bracket for fixing the main body of the camera, and a first clamping device, a second clamping device, a first automatic rotation device and a second automatic rotation device mounted on the bracket.

[0006] The first clamping device is used to circumferentially clamp the focusing ring of the camera;

[0007] The first automatic rotating device is used to rotate the first clamping device, causing the focusing ring to rotate;

[0008] The second clamping device is used to circumferentially clamp the aperture ring of the camera;

[0009] The second automatic rotating device is used to rotate the second clamping device, causing the aperture ring to rotate;

[0010] The front end of the watertight camera barrel has a viewfinder to facilitate shooting by the camera lens.

[0011] Preferably, the first clamping device includes a first wheel ring, and a plurality of evenly distributed focusing ring clamping blocks are arranged in the inner ring of the first wheel ring. The focusing ring clamping blocks are hinged to the first wheel ring by pins arranged axially on the first wheel ring. The first wheel ring is provided with a first driving mechanism for rotating the focusing ring clamping blocks to clamp the focusing ring tightly.

[0012] The first automatic rotating device includes a second wheel ring, the outer wall of which is rotatably connected to the inner wall of the bracket, and the second wheel ring is disposed at the rear end of the first wheel ring and connected to the first wheel ring through a connecting mechanism. A second driving mechanism for rotating the second wheel ring is installed on the bracket.

[0013] Preferably, the connecting mechanism is a telescopic rod.

[0014] Preferably, the second automatic rotating device includes a third wheel ring, which is disposed inside the second wheel ring and rotatably connected to the second wheel ring, and the bracket has a third driving mechanism for rotating the third wheel ring;

[0015] The second clamping device includes at least two aperture ring clamping blocks evenly distributed on the front end face of the third wheel ring. The aperture ring clamping blocks are hinged to the third wheel ring. A fourth driving mechanism is arranged on the bracket for rotating the aperture ring clamping blocks to clamp the aperture ring tightly.

[0016] Preferably, the bracket and the camera body have a shock-absorbing mechanism.

[0017] Preferably, the rear end of the bracket has a camera support frame, which is slidably connected to the bracket along the axial direction of the bracket, and the camera support frame is provided with a fixing mechanism for fixing the relative position of the camera support frame.

[0018] Preferably, the system further includes a land-based measurement and control system, which is electrically connected to the first automatic rotation device, the second automatic rotation device, and the camera. The land-based measurement and control system is used to display the image captured by the camera and drive the first automatic rotation device and the second automatic rotation device to rotate the focusing ring and the aperture ring according to the image clarity, so that the image captured by the camera meets the test requirements.

[0019] Preferably, a camera and a lighting device are fixed on the bracket. The camera is used to capture the values ​​of the focusing ring and the aperture ring. The camera is electrically connected to the land-based measurement and control system.

[0020] Preferably, the system further includes a deep learning module. The images captured by the camera are input into the deep learning module. The deep learning module outputs the angle data of the first automatic rotation device and the second automatic rotation device rotating the focusing ring and the aperture ring to the land-based measurement and control system. The land-based measurement and control system outputs the data to the first automatic rotation device and the second automatic rotation device.

[0021] Preferably, the database used by the deep learning module consists of previously qualified test images and the corresponding values ​​captured by the camera.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. This invention designs a high-speed photography device with underwater autonomous focusing function, overcoming the problem of inability to autofocus caused by the mismatch between the camera and lens in traditional underwater high-speed photography devices.

[0024] 2. The high-speed photography device of the present invention introduces a deep learning method, which can intelligently identify supercavitation of structures entering the water in complex underwater environments, and respond quickly according to the current image clarity, remotely and autonomously control the focusing equipment to automatically focus, so as to ensure that the quality of the monitored and stored supercavitation images is maintained at a high level.

[0025] 3. With the help of deep learning components, the high-speed photography device of the present invention can complete autonomous training based on a database of underwater supercavitation images that have been captured, continuously optimize control parameters, and improve its dynamic imaging capabilities for various high-speed water entry or supercavitation experiments, thereby obtaining more optimized underwater photography imaging quality and assisting in more detailed scientific research in related fields.

[0026] 4. The high-speed photography device of the present invention has a compact structure and high space utilization. It efficiently integrates the focusing equipment, the fixed support frame of the high-speed camera, and various drive motors, achieving autonomous underwater focusing while keeping the sealed camera barrel small in size. The high-speed camera can be firmly fixed to the inner wall of the camera barrel, and the buffer design between the camera and the inner wall of the camera barrel can help the underwater high-speed photography device withstand the impact of a structure entering the water at high speed (approximately 200 m / s) at a distance of about 2m from the entry point.

[0027] Based on the above reasons, this invention can be widely applied in fields such as underwater observation of structures. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the underwater high-speed photography device of the present invention.

[0030] Figure 2 This is a three-dimensional view of an underwater high-speed photography device of the present invention after removing the watertight camera barrel.

[0031] Figure 3 This is a diagram showing the usage status of an underwater high-speed photography device according to the present invention.

[0032] Figure 4 This is a schematic diagram of the invention.

[0033] Figure 5 This is a schematic diagram of the internal structure of the watertight camera barrel of the present invention.

[0034] Figure 6 This is an exploded view of the internal structure of the watertight camera barrel of the present invention (with the camera removed).

[0035] In the diagram: 1. Watertight camera barrel; 2. Camera; 201. Focusing ring; 202. Aperture ring; 3. Bracket; 301. Outer frame; 302. Fourth fixed wheel ring; 303. Camera support frame; 304. Longitudinal support keel; 4. First clamping device; 401. First wheel ring; 402. Focusing ring clamp; 403. Pin; 404. First drive mechanism; 5. Second clamping device; 501. Aperture ring clamp; 502. Fourth drive mechanism; 6. First automatic rotation device; 601. Second wheel ring; 602. Connecting mechanism; 603. Second drive mechanism; 7. Second automatic rotation device; 701. Third wheel ring; 702. Third drive mechanism; 8. Camera; 9. Land-based measurement and control system. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0043] like Figures 1-6 As shown, an underwater high-speed photography device includes a watertight camera tube 1, and a bracket 3 for fixing the main body of a camera 2 inside the watertight camera tube. A first clamping device 4, a second clamping device 5, a first automatic rotation device 6, and a second automatic rotation device 7 are installed on the bracket 3. The camera 2 mentioned in this specific embodiment is a high-speed camera.

[0044] The first clamping device 4 is used to circumferentially clamp the focusing ring 201 of the camera 2; the first automatic rotating device 6 is used to rotate the first clamping device 4 to make the focusing ring 201 rotate; the second clamping device 5 is used to circumferentially clamp the aperture ring 202 of the camera 2; the second automatic rotating device 7 is used to rotate the second clamping device 5 to make the aperture ring 202 rotate.

[0045] The watertight camera barrel 1 is equipped with flanges at the front and rear. The front flange is used to fix the acrylic viewing window, and the rear flange is connected to a metal-rubber hose for connecting the land-based measurement and control system 9 and various mechanisms to power them via the wiring bundles of each device. O-rings are used for watertight sealing between the front and rear flanges and the main flange of the camera barrel, and the metal-rubber hose is watertightly connected to the rear flange. In this specific embodiment, the watertight camera barrel 1 is cylindrical.

[0046] The support 3 includes a cylindrical outer frame 301, which is fixedly connected to the inner wall of the watertight camera barrel 1. The outer frame 301 has multiple weight-reducing rectangular holes. Multiple longitudinal support ribs 304 are fixed inside the outer frame. A fourth fixing ring 302 is fixed to the inner wall of the front end of each longitudinal support rib 304. A camera support frame 303 is located at the rear end of the outer frame 301. The camera support frame 303 is slidably connected to the outer frame 301 along the axial direction of the outer frame 301, and the camera support frame 303 is provided with a fixing mechanism for fixing its relative position. The fixing mechanism can be configured in various ways, such as arranging multiple mounting holes on the outer frame or installing set screws on the camera support frame 303. The reason for the adjustable position of the camera support 303 is to accommodate cameras 2 of various sizes. There is a buffer and shock absorption mechanism between the camera support 303 and the main body of the camera 2. In this specific embodiment, the buffer and shock absorption mechanism adopts a simple buffer pad, which can adapt to cameras 2 of different sizes and also play a buffering role.

[0047] The first clamping device 4 includes a first wheel ring 401. Multiple evenly distributed focusing ring clamping blocks 402 are arranged in the inner ring of the first wheel ring 401. The focusing ring clamping blocks 402 are hinged to the first wheel ring 401 via pins 403 axially arranged on the first wheel ring. The first wheel ring 401 is provided with a first driving mechanism 404 for rotating the focusing ring clamping blocks 402 to clamp the focusing ring 201. The focusing ring clamping blocks 402 are hammer-shaped and inclined, and have toothed surfaces. The first driving mechanism 404 can be configured in various ways. For example, each focusing ring clamping block 402 can be equipped with a motor, but this method is wasteful and inconvenient for subsequent process parameter control. Alternatively, only one motor can be used, with a gear meshing with the gear on one of the focusing ring clamping blocks 402. The four focusing ring clamping blocks 402 are connected in series by a belt to achieve linkage of the four focusing ring clamping blocks 402, and only one motor is needed for driving. The focusing ring clamp 402 can also use a radial telescopic form to clamp the focusing ring 201, which can achieve automatic clamping of the focusing ring 201.

[0048] The first automatic rotating device 6 includes a second wheel ring 601, the outer wall of which is rotatably connected to the inner wall of a fourth fixed wheel ring 302. The second wheel ring 601 is located at the rear end of the first wheel ring 401 and connected to it via a connecting mechanism 602. A second driving mechanism 603 for rotating the second wheel ring 601 is installed in the rectangular opening of the outer frame 301. The second driving mechanism can be a motor, with gears meshing with external teeth on the outer wall of the rear end of the second wheel ring 601. The connecting mechanism 602 can be a standard telescopic rod, an electric push rod, or other mechanisms to accommodate lenses of different sizes.

[0049] The second automatic rotating device 7 includes a third wheel ring 701, which is disposed inside the second wheel ring 601 and rotatably connected to the second wheel ring 601. A third driving mechanism 702 for rotating the third wheel ring is installed in the rectangular opening of the outer frame 301. The structure of the third driving mechanism is the same as that of the second driving mechanism.

[0050] The second clamping device 5 includes at least two aperture ring clamping blocks 501 evenly distributed on the front end face of the third wheel ring 701. The aperture ring clamping blocks 501 are hammer-shaped and inclined, and have toothed surfaces. A connecting rod passes through the third wheel ring 701. The aperture ring clamping blocks 501 are hinged to the third wheel ring 701 through the connecting rod. The aperture ring clamping blocks 501 are fixedly connected to the connecting rod, and the connecting rod is rotatably connected to the third wheel ring 701. A fourth driving mechanism 502 for rotating the aperture ring clamping blocks 501 to clamp the aperture ring 202 is installed in the rectangular opening of the outer frame 301. The fourth driving mechanism 502 can be a motor, with the output shaft of the motor connected to the connecting rod. Other connecting rods are connected to the connecting rod through pulleys, so that one motor drives multiple connecting rods to move synchronously. Alternatively, other methods can be used to drive the aperture ring clamping blocks 501 to rotate and thus clamp the aperture ring 202. The aperture ring clamp 501 can also clamp the aperture ring 202 in a radially telescopic manner, which can achieve automatic clamping of the aperture ring 202.

[0051] The front end face of the outer frame 301 is fixed with a camera 8 and an illumination device. The camera 8 is used to capture the values ​​of the focusing ring 201 and the aperture ring 202.

[0052] It also includes a land-based measurement and control system 9, which is electrically connected to the first automatic rotation device 6, the second automatic rotation device 7, the camera 2, and the camera 8. The land-based measurement and control system 9 is used to display the image captured by the camera 2, and drive the first automatic rotation device 6 and the second automatic rotation device 7 to rotate the focusing ring 201 and the aperture ring 202 according to the clarity of the image, so that the clarity of the image captured by the camera 2 meets the test requirements.

[0053] The system also includes a deep learning module. Images captured by camera 2 are input into the deep learning module, which outputs angle data from the first automatic rotation device 6 and the second automatic rotation device 7 to rotate the focusing ring 201 and the aperture ring 202. This data is then sent to the land-based measurement and control system 9, which outputs the data back to the first automatic rotation device 6 and the second automatic rotation device 7. The deep learning module uses a database of previously qualified test images and the corresponding values ​​captured by camera 8. Through deep learning from these images, automatic underwater focusing in complex underwater environments is achieved. Autonomous training is performed based on a database of previously captured underwater supercavitation images to optimize control parameters and continuously improve the dynamic imaging capabilities of high-speed water entry or supercavitation tests under complex conditions, ensuring that all obtained dynamic images have sufficiently high clarity.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An underwater high-speed photography device, characterized in that, The device includes a watertight camera barrel, which has a bracket for fixing the main body of the camera inside. The bracket is equipped with a first clamping device, a second clamping device, a first automatic rotating device, and a second automatic rotating device. The first clamping device is used to circumferentially clamp the focusing ring of the camera; The first automatic rotating device is used to rotate the first clamping device, causing the focusing ring to rotate; The second clamping device is used to circumferentially clamp the aperture ring of the camera; The second automatic rotating device is used to rotate the second clamping device, causing the aperture ring to rotate; The front end of the watertight camera barrel has a view window to facilitate shooting by the camera lens; The first clamping device includes a first wheel ring, and a plurality of evenly distributed focusing ring clamping blocks are arranged in the inner ring of the first wheel ring. The focusing ring clamping blocks are hinged to the first wheel ring by a pin arranged axially on the first wheel ring. The first wheel ring is provided with a first driving mechanism for rotating the focusing ring clamping blocks to make them fit tightly to clamp the focusing ring. The first automatic rotating device includes a second wheel ring, the outer wall of which is rotatably connected to the inner wall of the bracket, and the second wheel ring is disposed at the rear end of the first wheel ring and connected to the first wheel ring through a connecting mechanism. A second driving mechanism for rotating the second wheel ring is installed on the bracket. The second automatic rotating device includes a third wheel ring, which is disposed inside the second wheel ring and rotatably connected to the second wheel ring. The bracket has a third driving mechanism for rotating the third wheel ring. The second clamping device includes at least two aperture ring clamping blocks evenly distributed on the front end face of the third wheel ring. The aperture ring clamping blocks are hinged to the third wheel ring. A fourth driving mechanism for rotating the aperture ring clamping blocks to clamp the aperture ring tightly is arranged on the bracket. The device also includes a land-based measurement and control system, which is electrically connected to the first automatic rotation device, the second automatic rotation device, and the camera. The land-based measurement and control system is used to display the image captured by the camera and drive the first automatic rotation device and the second automatic rotation device to rotate the focusing ring and the aperture ring according to the image clarity, so that the image captured by the camera meets the test requirements. A camera and a lighting device are fixed on the bracket. The camera is used to capture the values ​​of the focusing ring and the aperture ring. The camera is electrically connected to the land-based measurement and control system. The device also includes a deep learning module. The images captured by the camera are input into the deep learning module. The deep learning module outputs the angle data of the first automatic rotation device and the second automatic rotation device rotating the focusing ring and the aperture ring to the land-based measurement and control system. The land-based measurement and control system outputs the data to the first automatic rotation device and the second automatic rotation device.

2. The underwater high-speed photography device according to claim 1, characterized in that, The connecting mechanism is a telescopic rod.

3. The underwater high-speed photography device according to claim 1, characterized in that, The bracket has a shock-absorbing mechanism between it and the camera body.

4. The underwater high-speed photography device according to claim 1, characterized in that, The rear end of the bracket has a camera support frame, which is slidably connected to the bracket along the axial direction of the bracket, and the camera support frame is provided with a fixing mechanism for fixing the relative position of the camera support frame.

5. The underwater high-speed photography device according to claim 1, characterized in that, The database used by the deep learning module consists of previously qualified test images and the corresponding values ​​captured by the camera.

Images