An experimental device for simulating water flow video and a river video speed measuring device

Abstract

The present disclosure provides an experimental device for simulating acquisition of water flow video and a river video speed measuring device. The experimental device for simulating acquisition of water flow video comprises a river channel model, a plurality of support frame assemblies, a plurality of video acquisition modules and a switch. Each support frame assembly comprises a first support frame and a second support frame connected together. The first support frame is arranged across the top of the river channel model, and the second support frame is arranged at the side of the river channel model. The plurality of video acquisition modules correspond to the plurality of support frame assemblies one by one. Each video acquisition module comprises a first camera and a second camera. The first camera is arranged on the first support frame, and the second camera is arranged on the second support frame. The second camera is arranged at an angle with respect to the vertical direction of the river channel. The switch is connected to the video acquisition modules and is used to realize synchronous shooting of the first camera and the second camera. Through the scheme provided by the present disclosure, water flow video data of multiple perspectives, scenes and resolutions can be acquired simultaneously.

Description

Technical Field

[0001] This disclosure relates to the field of water conservancy engineering technology, and in particular to an experimental device for simulating the acquisition of water flow video and a river video velocity measuring device. Background Technology

[0002] Measuring water flow velocity is crucial for fields such as hydraulic engineering, environmental monitoring, and hydrological research. Traditional methods for measuring water flow velocity, such as direct measurement with current meters or tracking water flow velocity using buoys, typically suffer from limitations such as cumbersome operation, low efficiency, and limited measurement range. In recent years, with the advancement of computer vision technology, water flow velocity measurement methods based on video image processing have become a promising alternative. Nevertheless, current image-based water flow velocity measurement technologies still face some challenges. For example, image acquisition is a major difficulty. For video velocity measurement, it is necessary to simultaneously acquire water flow video data from multiple perspectives, scenes, and resolutions, and existing devices struggle to acquire water flow videos that meet the required standards. Summary of the Invention

[0003] In view of this, the present disclosure provides an experimental apparatus for simulating the acquisition of water flow video and a river video velocity measurement device, which at least partially solves the problems existing in the prior art.

[0004] The first aspect of this disclosure provides an experimental apparatus for simulating the acquisition of water flow video, including a river model, multiple support frame assemblies, multiple video acquisition modules, and a switch; each support frame assembly includes a first support frame and a second support frame connected together, the first support frame spanning across the top of the river model, and the second support frame disposed on the side of the river model; the multiple video acquisition modules correspond one-to-one with the multiple support frame assemblies, each video acquisition module including a first camera and a second camera, the first camera being disposed on the first support frame, the second camera being disposed on the second support frame, and the second camera being disposed at an angle to the direction perpendicular to the river channel; the switch is connected to the video acquisition modules to realize synchronous shooting by the first camera and the second camera.

[0005] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow video further includes a sunshade and lighting, with the river model, support frame assembly, and video acquisition module all housed inside the sunshade.

[0006] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow video further includes a data processing module, which is connected to the video acquisition module and is used to process the data acquired by the video acquisition module.

[0007] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow videos further includes a tracer placed inside a river channel model.

[0008] According to one specific implementation of the first aspect of this disclosure, the river model is made of acrylic sheet material.

[0009] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow video further includes a light-shielding component, which is wrapped around the surface of the river model.

[0010] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow videos further includes a water level gauge, which is set inside the river channel model.

[0011] According to a specific implementation of the first aspect of this disclosure, the experimental apparatus for simulating the acquisition of water flow videos further includes a water flow velocity measurement module, which is set within the river channel model.

[0012] A second aspect of this disclosure provides a river video velocity measurement device, including multiple support frame assemblies, multiple video acquisition modules, a switch, and a data processing module. Each support frame assembly includes a first support frame and a second support frame connected together. The first support frame spans across the river, and the second support frame is disposed on the side of the river. Each video acquisition module corresponds one-to-one with one of the support frame assemblies. Each video acquisition module includes a first camera and a second camera. The first camera is disposed on the first support frame, and the second camera is disposed on the second support frame, with the second camera positioned at an angle to the direction perpendicular to the river channel. The switch is connected to the video acquisition modules to enable synchronous shooting by the first and second cameras. The data processing module processes the video data acquired by the video acquisition modules to obtain the river flow velocity.

[0013] The experimental apparatus for simulating and acquiring water flow video provided in this embodiment includes a river model, multiple support frame assemblies, multiple video acquisition modules, and a switch. Each support frame assembly includes a first support frame and a second support frame connected together. The first support frame spans across the top of the river model, and the second support frame is disposed on the side of the river model. Each video acquisition module corresponds one-to-one with one of the support frame assemblies. Each video acquisition module includes a first camera and a second camera. The first camera is disposed on the first support frame, and the second camera is disposed on the second support frame, with the second camera at an angle to the direction perpendicular to the river channel. The switch is connected to the video acquisition modules to enable synchronous shooting by the first and second cameras. By setting up multiple video acquisition modules, each with two cameras, the first camera is used to vertically capture water flow video data from the river model, and the second camera is used to capture water flow video data from the river model at an angle. The switch enables synchronous shooting by multiple cameras, thereby simultaneously acquiring water flow video data from multiple perspectives, scenes, and resolutions, providing strong data support for river video velocity measurement. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a partial structural schematic diagram of an experimental apparatus for simulating the acquisition of water flow video, provided in the first aspect of this disclosure.

[0016] The accompanying drawings may not be drawn to scale.

[0017] Explanation of reference numerals in the attached figures: 10. Experimental apparatus for simulating water flow video acquisition; 1. River channel model; 2. Support frame assembly; 21. First support frame; 22. Second support frame; 3. Video acquisition module; 31. First camera; 32. Second camera. Detailed Implementation

[0018] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0020] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0021] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these aspects can be practiced without these specific details.

[0023] Measuring water flow velocity is crucial for fields such as hydraulic engineering, environmental monitoring, and hydrological research. Traditional methods for measuring water flow velocity, such as direct measurement with current meters or tracking water flow velocity using buoys, typically suffer from limitations such as cumbersome operation, low efficiency, and limited measurement range. In recent years, with the advancement of computer vision technology, water flow velocity measurement methods based on video image processing have become a promising alternative. Nevertheless, current image-based water flow velocity measurement technologies still face some challenges. For example, image acquisition is a major difficulty. For video velocity measurement, it is necessary to simultaneously acquire water flow video data from multiple perspectives, scenes, and resolutions, and existing devices struggle to acquire water flow videos that meet the required standards.

[0024] To address the aforementioned problems, this disclosure provides an experimental apparatus for simulating the acquisition of water flow videos and a river video velocity measurement device. The experimental apparatus for simulating the acquisition of water flow videos and the river video velocity measurement device of this disclosure will be described below with reference to the accompanying drawings.

[0025] Please refer to Figure 1 The first aspect of this disclosure provides an experimental device 10 for simulating the acquisition of water flow video, including a river model 1, multiple support frame assemblies 2, multiple video acquisition modules 3, and a switch; each support frame assembly 2 includes a first support frame 21 and a second support frame 22 connected together, the first support frame 21 spanning across the top of the river model 1, and the second support frame 22 disposed on the side of the river model 1; the multiple video acquisition modules 3 correspond one-to-one with the multiple support frame assemblies 2, each video acquisition module 3 including a first camera 31 and a second camera 32, the first camera 31 being disposed on the first support frame 21, and the second camera 32 being disposed on the second support frame 22, and the second camera 32 being disposed at an angle to the direction perpendicular to the river channel; the switch is connected to the video acquisition modules 3 for realizing synchronous shooting by the first camera 31 and the second camera 32.

[0026] The distance between the support frame assembly 2 and the river channel model 1 is determined according to the actual situation to ensure that the video acquisition module 3 can capture sufficient information about the flow velocity on the surface of the water in the river channel model 1. Optionally, the distance between the first camera 31 and the river channel model 1 is 30cm, and the angle between the second camera 32 and the direction perpendicular to the river channel is 30°. Of course, the height of the support frame will vary depending on the resolution of the camera. The sampling frequency and exposure time of the video acquisition module 3 should be reasonably adjusted according to the actual lighting conditions and water flow speed to ensure that clear and stable video images are captured. The video acquisition module 3 should also be checked and cleaned regularly to avoid dirt and dust affecting video quality. Optionally, there are three support frame assemblies 2 and three video acquisition modules 3.

[0027] By setting up multiple video acquisition modules 3, and each video acquisition module 3 is equipped with two cameras, the first camera 31 is used to capture water flow video data of the river model 1 vertically, and the second camera 32 is used to capture water flow video data of the river model 1 at an oblique angle. The simultaneous shooting of multiple cameras is achieved through a switch, thereby simultaneously acquiring water flow video data from multiple perspectives, scenes, and resolutions, providing strong data support for river video velocity measurement.

[0028] In some optional embodiments, the experimental apparatus 10 for simulating water flow video acquisition also includes a sunshade and lighting. The river model 1, support frame assembly 2, and video acquisition module 3 are all housed inside the sunshade. The sunshade removes sunlight interference and protects the equipment. The lighting simulates daytime and nighttime water flow by switching the lights on and off. Correspondingly, the first camera 31 and the second camera 32 should also simultaneously switch between daytime and nighttime shooting modes. LED lights should be avoided. Because LED lights use dynamic scanning illumination, if the camera's sampling frequency does not match the LED's flicker frequency, it may cause interference phenomena such as moiré patterns in the video. Optionally, high-power incandescent lamps are used for lighting. Incandescent lamps provide stable and continuous illumination, helping to reduce light and shadow fluctuations and interference in the video. It should be understood that the light intensity provided by the lighting should ensure that the light intensity inside the sunshade is the same as the outside light intensity during the day.

[0029] In some optional embodiments, the experimental apparatus 10 for simulating the acquisition of water flow video also includes a data processing module connected to the video acquisition module 3. The data processing module is used to process the data acquired by the video acquisition module 3 to obtain the water flow velocity in the river model 1.

[0030] In some optional embodiments, the experimental apparatus 10 for simulating and acquiring video of water flow also includes a tracer placed within the river channel model 1. The tracer makes fluid flow more visually apparent, especially when the water flow velocity is slow or flow patterns are difficult to observe. By adding a tracer, experimenters can more easily identify and track the fluid's trajectory, thereby more accurately analyzing the flow characteristics of the hydraulic system. Furthermore, the tracer can be used to measure key parameters such as fluid velocity, direction, and flow rate. For example, by recording the displacement of the tracer over a specific time period, the average fluid velocity can be calculated. These parameters are crucial for evaluating the performance of the hydraulic system and optimizing its design. In addition, the tracer can help experimenters identify and analyze complex flow patterns, such as vortices, backflows, and separations, which are important for understanding fluid dynamics principles and predicting potential problems in hydraulic systems.

[0031] It should be understood that tracers should have good visibility to ensure clear identification and tracking in video recordings. This typically requires tracers to have colors or shapes that contrast sharply with the background. Furthermore, tracers should remain stable in the fluid, resisting deformation or breakage, to ensure that their trajectory accurately reflects the fluid's flow characteristics during the experiment. Simultaneously, tracers should be non-toxic or low-toxic to avoid harm to personnel and the environment. Safety should be a primary consideration when selecting tracers; their addition should not significantly alter the physical and chemical properties of the fluid to ensure the accuracy and reliability of experimental results. Additionally, tracers should ideally be readily available and inexpensive to allow for large-scale use during experiments, thereby reducing costs and increasing feasibility. For example, foam balls or solid PP spheres can be used as tracers.

[0032] In some alternative embodiments, the river model 1 is made of acrylic sheet material. Acrylic sheets are low in cost, readily available, and have stable physical and chemical properties. Since acrylic sheets are transparent, to prevent reflections from the inner wall of the acrylic sheet and light transmission from the bottom water flow, which could affect video acquisition, the experimental device 10 for simulating water flow video acquisition is also equipped with a light-shielding component, which wraps around the surface of the river model 1. Optionally, waterproof yellow kraft paper is included on the two inner sidewalls of the river model 1, and a dark non-reflective material plate is attached to the bottom of the river model 1. It is particularly important that neither the yellow kraft paper nor the dark non-reflective material plate should affect the water flow. The kraft paper should be tightly fitted to the inner sidewalls, minimizing gaps to prevent it from being washed away by the water flow. Simultaneously, the dark non-reflective material plate should also ensure that it does not alter the original water flow state.

[0033] In some optional embodiments, the experimental apparatus 10 for simulating and acquiring water flow video further includes a water level gauge and a water flow velocity measurement module. The water level gauge is set within the river channel model 1 to record water level conditions, and the water flow velocity measurement module is set within the river channel model 1. Optionally, the water flow velocity measurement module includes two different velocity meters for cross-validation.

[0034] A second aspect of this disclosure provides a river video velocity measurement device, including multiple support frame assemblies 2, multiple video acquisition modules 3, a switch, and a data processing module. Each support frame assembly 2 includes a first support frame 21 and a second support frame 22 connected together. The first support frame 21 spans across the river, and the second support frame 22 is disposed on the side of the river. Each video acquisition module 3 corresponds one-to-one with a support frame assembly 2. Each video acquisition module 3 includes a first camera 31 and a second camera 32. The first camera 31 is disposed on the first support frame 21, and the second camera 32 is disposed on the second support frame 22, with the second camera 32 positioned at an angle to the direction perpendicular to the river channel. The switch is connected to the video acquisition modules 3 to enable synchronous shooting by the first camera 31 and the second camera 32. The data processing module processes the video data acquired by the video acquisition modules 3 to obtain the river flow velocity.

[0035] The river video velocity measuring device provided in the second aspect of this disclosure has the same core components and concept as the experimental device 10 for simulating the acquisition of water flow video provided in the first aspect of the aforementioned embodiment, and has all the beneficial effects of the efficient clarification device in the first aspect of the aforementioned embodiment. To avoid repetition, it will not be described again here.

[0036] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An experimental apparatus for simulating the acquisition of water flow video, comprising: River channel model; Multiple support frame assemblies, each of the support frame assemblies including a first support frame and a second support frame connected together, the first support frame spanning across the top of the river channel model, and the second support frame disposed on the side of the river channel model; Multiple video acquisition modules correspond one-to-one with multiple support frame components. Each video acquisition module includes a first camera and a second camera. The first camera is mounted on the first support frame, and the second camera is mounted on the second support frame. The second camera is set at an angle to the direction perpendicular to the river channel. A switch, connected to the video acquisition module, is used to enable synchronous shooting by the first camera and the second camera.

2. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, It also includes a sunshade and lighting, and the river model, the support frame assembly, and the video acquisition module are all located inside the sunshade.

3. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, It also includes a data processing module, which is connected to the video acquisition module and is used to process the data acquired by the video acquisition module.

4. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, It also includes tracers placed within the river channel model.

5. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, The river model is made of acrylic sheet material.

6. The experimental apparatus for simulating the acquisition of water flow video according to claim 5, characterized in that, It also includes a light-shielding component that wraps around the surface of the river model.

7. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, It also includes a water level gauge, which is set inside the river channel model.

8. The experimental apparatus for simulating the acquisition of water flow video according to claim 1, characterized in that, It also includes a water flow velocity measurement module, which is set inside the river channel model.

9. A river video speed measuring device, characterized in that, include: Multiple support frame assemblies, each of the support frame assemblies including a first support frame and a second support frame connected together, the first support frame spanning over the river and the second support frame disposed on the side of the river; Multiple video acquisition modules correspond one-to-one with multiple support frame components. Each video acquisition module includes a first camera and a second camera. The first camera is mounted on the first support frame, and the second camera is mounted on the second support frame. The second camera is set at an angle to the direction perpendicular to the river channel. A switch, connected to the video acquisition module, is used to enable synchronous shooting by the first camera and the second camera; The data processing module is used to process the video data acquired by the video acquisition module and obtain the river flow velocity.

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