Real-time visualization device and method for images of large rotating equipment

Abstract

The invention belongs to the field of industrial equipment monitoring and state monitoring, and particularly relates to a real-time visualization device and method for images of large rotating equipment. The objective of the invention is to solve the problems that in the prior art, real-time performance is insufficient in the aspect of realizing image visualization of large-scale rotating equipment, and clear images and miniaturization and light weight of the equipment cannot be satisfied at the same time. The device comprises a convex lens which is arranged in front of a lens of the image acquisition equipment and is used for forming a clear inverted image of a to-be-observed part on a photosensitive sensor of the image acquisition equipment; the image acquisition equipment is fixed in the large rotating equipment and is used for acquiring an image of the to-be-observed component based on a photosensitive sensor and transmitting the image to the image transmission equipment; the image transmission equipment is used for transmitting an image to the outside of the rotating equipment; and the light illumination equipment is used for enabling the to-be-observed part of the rotating equipment to be under balanced and stable light rays. According to the invention, real-time image visualization of the internal operation state of the large-scale rotating equipment is realized.

Description

Background Art

[0002] In modern industrial production, large rotating equipment such as steam turbine generator sets, fans, and hydro-turbine generator sets are widely used in various fields. The monitoring and management of their operating status are of great significance for ensuring production efficiency, reducing operation and maintenance costs, and preventing equipment failures. Traditional monitoring methods mainly rely on vibration sensors and offline data analysis, but these methods have limitations such as insufficient real-time performance and low data acquisition efficiency. In recent years, with the development of computer vision and image processing technology, operating status monitoring based on real-time image visualization methods has gradually become a new solution. This method can capture the operating status of the equipment through video, and use image processing technology to analyze and visualize the vibration, movement and other information of the equipment, which can more intuitively display the operating status of the equipment. However, the realization of real-time image visualization function still faces some challenges. First, the rotating equipment needs to withstand a large centrifugal force, requiring the visualization system device to be small in size and light in weight to reduce danger. Secondly, the operating status of large rotating equipment changes rapidly, requiring real-time processing and visualization. In addition, in general, the test signal on the rotating equipment can be transmitted to the stationary equipment through the slip ring, but the short-distance wired transmission of the image signal mainly relies on coaxial cable. Coaxial cable consists of four parts: center conductor, insulating medium, shielding layer and sheath. It has excellent shielding performance and can "bind" the signal electromagnetic field in the medium space to reduce external interference. However, the structure of the slip ring makes it difficult to achieve these shielding functions, making it difficult to transmit the image signal from the rotating device to the stationary device via wired means. Finally, miniaturization and lightweight equipment often require sacrificing performance, resulting in difficulty in ensuring clarity.

[0003] In summary, the existing technology has the problems of insufficient real-time performance in realizing image visualization of large rotating equipment and cannot simultaneously meet the requirements of image clarity and equipment miniaturization and lightness. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a real-time visualization device for large rotating equipment images, the device comprising:

[0005] A convex lens, arranged in front of the lens of the image acquisition device, for forming an inverted image of the component to be observed on the photosensitive sensor of the image acquisition device;

[0006] An image acquisition device is fixed inside the large rotating device and is used to acquire images of the components to be observed based on a photosensitive sensor and transmit the images to an image transmission device;

[0007] An image transmission device, used for receiving images and transmitting the images to the outside of the rotating device;

[0008] The lighting device is used to ensure that the part to be observed of the rotating device is under balanced and stable light at any position when it is rotated. The lighting device does not rotate with the rotating device.

[0009] In a preferred embodiment, the focal length of the convex lens is related to the distance between the photosensitive sensors in the image acquisition device and the object distance of the component to be observed, specifically:

[0010] Among them, f' is the overall focal length of the image acquisition device and the lens, v is the distance between the photosensitive sensors in the image acquisition device, and u2 is the object distance of the component to be observed.

[0011] In a preferred embodiment, the distance between the center of the convex lens and the center of the lens of the image acquisition device is related to the focal length of the convex lens, specifically:

[0012] Among them, d is the distance between the center of the convex lens and the center of the lens of the image acquisition device, f2 is the focal length of the convex lens, f1 is the focal length of the image acquisition device, and f′ is the overall focal length of the image acquisition device and the lens.

[0013] In a preferred embodiment, the visualization device further includes a power supply slip ring, and the power supply slip ring is used to supply power to the image transmission device and the lighting device.

[0014] In a preferred embodiment, the image acquisition device is a small and lightweight image acquisition device, and the image acquisition device includes a lens and a photosensitive sensor.

[0015] In a preferred embodiment, the image transmission device is a small and lightweight image transmission device.

[0016] In a preferred embodiment, the image transmission device includes a transmitter and a receiver; the transmitter is fixed inside a large rotating device and collects images from an image collection device, and the receiver is located outside the rotating device and receives images sent by the transmitter.

[0017] In a second aspect of the present invention, a visualization method of a real-time visualization device for large-scale rotating equipment images is proposed, the visualization method comprising:

[0018] The convex lens projects the light of the component to be observed to the photosensitive sensor of the image acquisition device, and an image of the component to be observed is formed on the photosensitive sensor of the image acquisition device;

[0019] The image acquisition device transmits the image of the component to be observed formed on the photosensitive sensor to the image transmission device;

[0020] The image transmission device receives the image and transmits the image to the outside of the rotating device.

[0021] Beneficial effects of the present invention:

[0022] (1) The present invention realizes real-time image visualization of the internal operating status of large rotating equipment through image acquisition equipment, thereby improving the integration and automation of the observation system;

[0023] (2) The present invention adopts a miniaturized and lightweight image transmission device and image acquisition device, which improves safety at high speeds and reduces image distortion caused by centrifugal force and vibration;

[0024] (3) The lighting device of the present invention improves safety at high speeds while ensuring stability and continuity of image acquisition;

[0025] (4) Based on the image acquisition device proposed in the present invention, the internal operating status of the rotating device can be clearly observed and recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 is a schematic diagram of a large rotating device according to an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of a rotating device according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of an imaging optical path according to an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of optical path adjustment according to an embodiment of the present invention;

[0031] Figure 5 is a real shot image of the lighting device according to an embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the structure of a real-time image acquisition device provided by an embodiment of the present invention;

[0033] Figure 7 Actual picture of two-phase flow in the outlet section of the rotating experimental platform provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] The present invention provides a real-time visualization device for large-scale rotating equipment images, the device comprising:

[0037] A convex lens, arranged in front of the lens of the image acquisition device, for forming a clear inverted image of the component to be observed on the photosensitive sensor of the image acquisition device;

[0038] An image acquisition device is fixed inside the large rotating device and is used to acquire images of the components to be observed based on a photosensitive sensor and transmit the images to an image transmission device;

[0039] An image transmission device, used for receiving images and transmitting the images to the outside of the rotating device;

[0040] The lighting device is used to ensure that the part to be observed of the rotating device is under balanced and stable light at any position when it is rotated. The lighting device does not rotate with the rotating device.

[0041] In order to more clearly illustrate the real-time visualization device for large-scale rotating equipment images of the present invention, each module in the embodiment of the present invention is described in detail below.

[0042] The real-time visualization device for large rotating equipment images of the first embodiment of the present invention is specifically described as follows:

[0043] A convex lens, arranged in front of the lens of the image acquisition device, for forming a clear inverted image of the component to be observed on the photosensitive sensor of the image acquisition device;

[0044] In this article, clarity refers to visual clarity, which can also be determined by resolution. It is considered clear when the resolution is greater than a threshold. The specific threshold can be referred to as 1080p pixels.

[0045] Large rotating equipment refers to those rotating equipment that are large in size and heavy in weight; miniaturization and lightweighting refer to equipment or products that are smaller and lighter in size and weight.

[0046] The large rotating device can be a rotating experimental platform. The rotating experimental platform model and the schematic diagram of the towing device provided in the embodiment of the present invention are shown in FIG. Figure 1 As shown, the rotating experimental platform is connected to the dragging device through a transmission belt. The rotating experimental platform model mainly includes a machine base, a rotating shaft, a signal slip ring, and an experimental section. The signal slip ring and the experimental section are dragged by the rotating shaft, and the signal slip ring is mounted on the slip ring. The schematic diagram of the experimental section of the rotating experimental platform provided in the embodiment of the present invention is as follows: Figure 2 As shown, the experimental section includes a heating section pipeline, an outlet section pipeline, a condenser, and a liquid return section pipeline. When the rotating experimental platform is running, there is a gas-liquid two-phase flow in the outlet section pipeline. In addition, the outlet section pipeline adopts a transparent hose design with an inner diameter of 8mm and an outer diameter of 12mm for visual observation.

[0047] An image acquisition device is fixed inside the large rotating device and is used to acquire images of the components to be observed based on a photosensitive sensor and transmit the images to an image transmission device;

[0048] In this embodiment, the image acquisition device is a small and lightweight image acquisition device, and the image transmission device is a small and lightweight image transmission device. The image acquisition device includes a lens and a photosensitive sensor.

[0049] An image transmission device, used for receiving images and transmitting the images to the outside of the rotating device;

[0050] In this embodiment, the image acquisition device and the image transmission device use a lightweight FPV image transmission system and its matching image acquisition device; the FPV image transmission system includes a transmitter and a receiver, the transmitter is fixed inside the rotating device to transmit image signals, and the receiver is placed outside the rotating device to receive image signals; the image acquisition device has a focal length of f1, which can realize that the image at the object distance u1 forms a clear inverted small image on the photosensitive sensor at the image distance v. The imaging optical path diagram is shown in Figure 3 As shown;

[0051] In this embodiment, the focal length of the convex lens is related to the distance between the photosensitive sensors in the image acquisition device and the object distance of the component to be observed, specifically:

[0052] Among them, f' is the overall focal length of the image acquisition device and the lens, v is the distance between the photosensitive sensors in the image acquisition device, and u2 is the object distance of the component to be observed.

[0053] The imaging optical path adjustment method is: by superimposing a convex lens with a focal length of f2 in front of the lens, the overall focal length is adjusted to f', so that the image at the object distance u2 forms a clear inverted small image on the photosensitive sensor at the image distance v. The optical path adjustment diagram is shown in Figure 4 shown.

[0054] In this embodiment, the image transmission device includes a transmitter and a receiver; the transmitter is fixed inside the large rotating device and collects images from the image collection device, and the receiver is located outside the rotating device and receives images sent by the transmitter.

[0055] In this embodiment, the distance between the center of the convex lens and the center of the lens of the image acquisition device is related to the focal length of the convex lens, specifically:

[0056] Among them, d is the distance between the center of the convex lens and the center of the lens of the image acquisition device, f2 is the focal length of the convex lens, f1 is the focal length of the image acquisition device, and f′ is the overall focal length of the image acquisition device and the lens.

[0057] The lighting device is used to ensure that the part to be observed of the rotating device is under balanced and stable light at any position when it is rotated. The lighting device does not rotate with the rotating device.

[0058] In this embodiment, the actual pictures of the designed lighting device are as follows: Figure 5 As shown; in this embodiment, the FPV image transmission system transmitter and the lighting device are powered by the signal slip ring;

[0059] In this embodiment, the fixing device fixes the FPV image transmission system transmitter and the image acquisition device between the heating section pipe and the condensing section; the structural schematic diagram of the real-time image acquisition device provided by the embodiment of the present invention is as shown in Figure 6 As shown;

[0060] The actual pictures of the two-phase flow in the outlet section of the rotor evaporative cooling system experimental platform based on this embodiment are as follows: Figure 7 shown.

[0061] In this embodiment, the visualization device further includes a power supply slip ring, which is used to supply power to the image transmission device and the lighting device.

[0062] It should be noted that the real-time visualization device for large rotating equipment images provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be decomposed or combined. For example, the modules in the above embodiment can be combined into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not regarded as improper limitations of the present invention.

[0063] A visualization method of a real-time visualization device for large-scale rotating equipment images according to a second embodiment of the present invention comprises:

[0064] The convex lens projects the light of the component to be observed to the photosensitive sensor of the image acquisition device, and an image of the component to be observed is formed on the photosensitive sensor of the image acquisition device;

[0065] The image acquisition device transmits the image of the component to be observed formed on the photosensitive sensor to the image transmission device;

[0066] The image transmission device receives the image and transmits the image to the outside of the rotating device.

[0067] The present invention proposes a visualization method based on wireless image transmission technology and an optical path adjustment method, establishes a real-time image acquisition device, realizes real-time image acquisition of large rotating equipment at high rotation speed, improves the integration and automation of the observation system, and solves the problems of insufficient real-time performance, difficulty in signal transmission, and balance between equipment miniaturization and performance in the image visualization method of large rotating equipment in the prior art.

[0068] In this embodiment, a lightweight image acquisition device is used to meet the requirements of the experimental platform for small size, light weight and high reliability; real-time transmission of image signals is achieved through wireless image transmission technology, which improves the degree of automation and integration of the system; the designed continuous light source device can ensure that the outlet pipe of the rotating platform is under balanced and stable light when it rotates to any position, thereby improving the accuracy of the experimental data.

[0069] Although the various steps in the above embodiment are described in the above-mentioned order, those skilled in the art can understand that in order to achieve the effect of this embodiment, different steps do not have to be executed in such an order. They can be executed simultaneously (in parallel) or in a reverse order. These simple changes are within the scope of protection of the present invention.

[0070] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the system described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0071] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process and related instructions of the storage device and processing device described above can refer to the corresponding process in the aforementioned method embodiment and will not be repeated here.

[0072] Those skilled in the art should be able to appreciate that the modules and method steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two, and the programs corresponding to the software modules and method steps can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field. In order to clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0073] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0074] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0075] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.

[0076] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A real-time visualization device for large rotating equipment images, characterized in that: The device comprises: A convex lens, arranged in front of the lens of the image acquisition device, for forming a clear inverted image of the component to be observed on the photosensitive sensor of the image acquisition device; An image acquisition device is fixed inside the large rotating device and is used to acquire images of the components to be observed based on a photosensitive sensor and transmit the images to an image transmission device; An image transmission device, used for receiving images and transmitting the images to the outside of the rotating device; The lighting device is used to ensure that the part to be observed of the rotating device is under balanced and stable light at any position when it is rotated. The lighting device does not rotate with the rotating device.

2. The real-time visualization device for large rotating equipment images according to claim 1, characterized in that: The focal length of the convex lens is related to the distance between the photosensitive sensors in the image acquisition device and the object distance of the component to be observed, specifically: Among them, f' is the overall focal length of the image acquisition device and the lens, v is the distance between the photosensitive sensors in the image acquisition device, and u2 is the object distance of the component to be observed.

3. The real-time visualization device for large rotating equipment images according to claim 2, characterized in that: The distance between the center of the convex lens and the center of the image acquisition device lens is related to the focal length of the convex lens, specifically: Among them, d is the distance between the center of the convex lens and the center of the lens of the image acquisition device, f2 is the focal length of the convex lens, f1 is the focal length of the image acquisition device, and f′ is the overall focal length of the image acquisition device and the lens.

4. The real-time visualization device for large rotating equipment images according to claim 3, characterized in that: The visualization device also includes a power supply slip ring, which is used to supply power to the image transmission device and the lighting device.

5. The real-time visualization device for large rotating equipment images according to claim 4, characterized in that: The image acquisition device is a small and lightweight image acquisition device, and comprises a lens and a photosensitive sensor.

6. The real-time visualization device for large rotating equipment images according to claim 5, characterized in that: The image transmission device is a small and lightweight image transmission device.

7. The real-time visualization device for large rotating equipment images according to claim 6, characterized in that: The image transmission device includes a transmitting end and a receiving end; the transmitting end is fixed inside the large rotating device and collects images from the image collection device, and the receiving end is located outside the rotating device and receives images sent by the transmitting end.

8. A visualization method of a real-time visualization device for large rotating equipment images, based on the real-time visualization device for large rotating equipment images as described in any one of claims 1 to 7, characterized in that: The visualization method comprises: The convex lens projects the light of the component to be observed to the photosensitive sensor of the image acquisition device, and an image of the component to be observed is formed on the photosensitive sensor of the image acquisition device; The image acquisition device transmits the image of the component to be observed formed on the photosensitive sensor to the image transmission device; The image transmission device receives the image and transmits the image to the outside of the rotating device.

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