Fuel nozzle detection process evaluation method, system and equipment based on borescope technology

Abstract

The invention belongs to the field of aero-engine nozzle detection, particularly relates to a fuel nozzle detection process evaluation method, system and equipment based on a borescope technology, and aims to solve the problem that in the prior art, the state of a nozzle is difficult to comprehensively and accurately evaluate from an optimal angle, so that identification of tiny defects and material loss of the nozzle is affected. The method comprises the following steps: acquiring a detection process image of a nozzle, and acquiring a nozzle identification frame, a swirler identification frame, central points and offset between the central points; taking the central point of the image data as a starting point, and selecting two image areas with different preset percentages towards the periphery based on a preset length-width ratio; and evaluating the effectiveness of the detection process by taking the image area in which the central point of the nozzle identification frame falls, the offset and whether the nozzle identification frame is greater than the diameter of a preset reference circle as evaluation indexes. According to the method, the state of the nozzle can be evaluated more accurately from the optimal angle, and higher detection precision and reliability can be provided.

Description

Background Art

[0002] With the rapid development of the aviation industry, the performance of aircraft engines, as the heart of aircraft, is directly related to the safety and economy of flight. The working environment of aircraft engines is extremely harsh, especially in the combustion chamber, where high temperature, high pressure and complex chemical reactions pose great challenges to the components. As one of the key components of the combustion chamber, the fuel nozzle is responsible for mixing the fuel with high-pressure air in a specific proportion and spraying it into the combustion chamber at a specific angle for ignition and combustion. It plays a vital role in ensuring combustion efficiency, reducing emissions and improving the overall performance of the engine.

[0003] After long-term operation, the fuel nozzle may experience coating peeling, ablation, cracks and material loss, which may lead to changes in the fuel injection pattern and affect the combustion efficiency of the engine. Therefore, regular and detailed inspection and maintenance of the fuel nozzle is an important measure to ensure reliable engine operation. However, in actual operation, due to the complex internal structure of the combustion chamber, the small space, and the inside of the engine, it is impossible to perform a general visual inspection of the combustion chamber of the on-wing engine to evaluate the internal condition of the combustion chamber.

[0004] In particular, when inspecting fuel nozzles, the inspection angle is crucial to identifying minor defects and material loss on the nozzle surface. If the inspection angle is inappropriate, the key area of ​​the nozzle may not be clearly observed, leading to incorrect judgments. At present, the industry generally adopts the method of visual inspection through tools such as endoscopes, but since the endoscope probes on the market are all flexible shafts and cannot fix the movement trajectory in the combustion chamber, the effect of nozzle inspection depends entirely on the operating skills and experience of the inspector. The inspection quality of different inspectors varies.

[0005] Based on this, the present invention proposes a fuel nozzle detection process evaluation method, system and equipment based on borescope technology. Summary of the invention

[0006] In order to solve the above-mentioned problem in the prior art, that is, the prior art is difficult to comprehensively and accurately evaluate the nozzle status from the best angle, thereby affecting the identification of minor defects and material loss in the nozzle, the present invention provides a fuel nozzle detection process evaluation method, system and equipment based on boresight technology.

[0007] In one aspect of the present invention, a fuel nozzle inspection process evaluation method based on borescope technology is proposed, the method comprising:

[0008] Acquire a detection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the detection process image based on the outer contours of the nozzle and the swirler;

[0009] Obtaining the center point of the nozzle identification frame and the center point of the swirler identification frame, and calculating the offset between the two center points;

[0010] Taking the center point of the image data as the starting point, two image areas with different preset percentages are framed in all directions based on a preset aspect ratio;

[0011] The image area where the center point of the nozzle identification frame falls, the offset, and whether the nozzle identification frame is larger than the diameter of the preset reference circle are used as evaluation indicators to evaluate the effectiveness of the detection process.

[0012] In some preferred embodiments, the detection process image of the nozzle is obtained by inserting the borescope of the borescope probe device into the engine combustion chamber and aiming at the fuel nozzle to obtain the detection process image.

[0013] In some preferred embodiments, the nozzle identification frame and the swirler identification frame are obtained by:

[0014] The detection process image is video data, in which one piece of image data is sampled at every set time interval to obtain a nozzle identification frame and a swirler identification frame in the image data.

[0015] In some preferred embodiments, the offset is calculated as follows:

[0016] μ=(b / a)×100%;

[0017] Wherein, μ is the offset, b is the height of the nozzle identification frame, and a is the distance from the midline point of the nozzle identification frame to the center point of the cyclone identification frame.

[0018] In some preferred embodiments, the effectiveness of the detection process is evaluated by:

[0019] Determine whether the detection position of the borescope probe is effective based on the evaluation indicators:

[0020] When the center point of the nozzle identification frame falls within two image areas of different preset percentages, and the offset is less than the preset percentage, and the height of the nozzle identification frame is greater than the height of the reference circle, the detection process is determined to be effective;

[0021] When the center point of the nozzle identification frame does not fall within two image areas of different preset percentages, or the offset is greater than the preset percentage, or the height of the nozzle identification frame is less than the height of the reference circle, the detection process is determined to be invalid, and the position of the borescope probe is continued to be adjusted until the adjustment is stopped when the detection position of the borescope probe is valid.

[0022] In some preferred embodiments, when the detection position is valid, the nozzle image data obtained when it is valid is obtained as the image data to be detected, and the damage data of the nozzle is obtained based on the image data to be detected.

[0023] In some preferred embodiments, if a plurality of nozzle identification frames are acquired from the image data, the areas of the plurality of nozzle identification frames are calculated, and the nozzle identification frame with the largest area is used as the nozzle identification frame to be determined.

[0024] Another aspect of the present invention provides a fuel nozzle inspection process effectiveness evaluation system based on borescope technology, based on a fuel nozzle inspection process evaluation method based on borescope technology, the system comprises:

[0025] An identification frame acquisition module is configured to acquire an inspection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the inspection process image based on the outer contours of the nozzle and the swirler;

[0026] an offset calculation module, configured to obtain a center point of the nozzle identification frame and a center point of the swirler identification frame, and calculate an offset between the two center points;

[0027] An image frame selection module is configured to use the center point of the image data as a starting point and frame two image areas of different preset percentages based on a preset aspect ratio.

[0028] The effectiveness evaluation module is configured to use the image area where the center point of the nozzle identification frame falls, the offset and whether the nozzle identification frame is larger than the diameter of a preset reference circle as evaluation indicators to evaluate the effectiveness of the detection process.

[0029] According to a third aspect of the present invention, an electronic device is provided, comprising:

[0030] at least one processor; and

[0031] a memory communicatively connected to at least one of the processors; wherein,

[0032] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement the above-mentioned fuel nozzle detection process evaluation method based on borescope technology.

[0033] In a fourth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the above-mentioned fuel nozzle detection process evaluation method based on borescope technology.

[0034] Beneficial effects of the present invention:

[0035] Improved detection accuracy: The fuel nozzle inspection process evaluation method based on borescope technology can more accurately evaluate the nozzle status from the best perspective, especially the tiny defects and material loss on the nozzle surface. Compared with traditional methods, this method can provide higher detection accuracy and reliability.

[0036] Optimized the detection process: The invention provides a complete detection process, including the acquisition of the nozzle identification frame and the cyclone identification frame, the calculation of the center point offset, and the effectiveness evaluation of the detection process. This not only standardizes the detection process, but also reduces the errors of manual operation through automated image processing technology and improves detection efficiency.

[0037] Improved safety: Through more detailed and accurate inspections of fuel nozzles, potential safety hazards can be discovered and repaired in a timely manner, avoiding engine performance degradation or safety accidents caused by nozzle failures, thereby ensuring flight safety and reliability.

[0038] Reduced maintenance costs: Effective detection methods can help airlines and maintenance organizations identify fuel nozzle problems in advance, avoid unnecessary removal and replacement, and save maintenance costs. At the same time, by accurately evaluating the health of the nozzle, a more scientific and reasonable maintenance plan can be formulated to extend the service life of the engine.

[0039] Enhanced adaptability: The detection method proposed in the present invention takes into account the complexity and challenges in actual operations, such as the narrow space and complex structure in the combustion chamber. Through flexible boresight technology and image analysis technology, it can adapt to different types and models of aircraft engines and has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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:

[0041] Figure 1 It is a flow chart of a fuel nozzle detection process evaluation method based on borescope technology of the present invention;

[0042] Figure 2 It is a schematic diagram of a nozzle identification frame and a swirler identification frame in a fuel nozzle detection process evaluation method based on borescope technology of the present invention;

[0043] Figure 3 It is a schematic diagram of calculation of offset in a fuel nozzle detection process evaluation method based on borescope technology of the present invention;

[0044] Figure 4 is a schematic diagram of image areas with different preset percentages in a fuel nozzle detection process evaluation method based on borescope technology of the present invention;

[0045] Figure 5 It is a schematic diagram of a reference circle in a fuel nozzle detection process evaluation method based on borescope technology of the present invention;

[0046] Figure 6 It is a structural diagram of a computer system of a server for implementing the method, system, and device embodiments of the present application. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] A first embodiment of the present invention provides a fuel nozzle inspection process evaluation method based on borescope technology, the method comprising:

[0050] Acquire a detection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the detection process image based on the outer contours of the nozzle and the swirler;

[0051] Obtaining the center point of the nozzle identification frame and the center point of the swirler identification frame, and calculating the offset between the two center points;

[0052] Taking the center point of the image data as the starting point, two image areas with different preset percentages are framed in all directions based on a preset aspect ratio;

[0053] The image area where the center point of the nozzle identification frame falls, the offset, and whether the nozzle identification frame is larger than the diameter of the preset reference circle are used as evaluation indicators to evaluate the effectiveness of the detection process.

[0054] In order to more clearly explain the fuel nozzle detection process evaluation method based on the borescope technology of the present invention, the following is combined with Figure 1 The embodiments of the present invention are described in detail, and each step is described in detail as follows:

[0055] Acquire a detection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the detection process image based on the outer contours of the nozzle and the swirler;

[0056] The present invention obtains the detection process image of the nozzle, and the acquisition method thereof is: the borescope of the borescope probe device is inserted into the engine combustion chamber, and is aimed at the fuel nozzle to obtain the detection process image.

[0057] More specifically, after receiving the production order, the staff arrived at the work site, opened the aircraft engine fairing, removed the combustion chamber borescope inspection cover, selected a 3.5-meter-long, 6mm-diameter soft-shaft borescope device (Fiberscope), and selected a 120-degree wide-angle observation lens for inspection. When removing a borescope cover for inspection, the borescope auxiliary catheter can be used to complete the inspection, insert the borescope probe into the engine combustion chamber, and pass it clockwise upward until the borescope probe itself is seen after passing through a circle, and then aim the lens at the fuel nozzle for inspection. The inspection process is to pull back the probe while checking, and complete the nozzle inspection in a full circle in sequence.

[0058] See also Figure 2 , the nozzle identification frame and the cyclone identification frame are obtained by:

[0059] The detection process image is video data, in which one piece of image data is sampled at every set time interval to obtain a nozzle identification frame and a swirler identification frame in the image data.

[0060] If a plurality of nozzle identification frames are acquired from the image data, the areas of the plurality of nozzle identification frames are calculated, and the nozzle identification frame with the largest area is used as the nozzle identification frame to be determined.

[0061] Figure 2-Figure 5 In the figure, the outer rectangular frame is the nozzle identification frame, and the inner rectangular frame is the cyclone identification frame.

[0062] See also Figure 3 , obtaining the center point of the nozzle identification frame and the center point of the swirler identification frame, and calculating the offset between the two center points;

[0063] The offset is calculated as follows:

[0064] μ=(b / a)×100%;

[0065] Wherein, μ is the offset, b is the height of the nozzle identification frame, and a is the distance from the midline point of the nozzle identification frame to the center point of the cyclone identification frame.

[0066] Taking the center point of the image data as the starting point, two image areas with different preset percentages are framed in all directions based on a preset aspect ratio;

[0067] Among them, see Figure 4 In this embodiment, the two image areas with different preset percentages are respectively the image within 20% of the center point of the image data and the image within 20%-50% of the center point of the image data.

[0068] Among them, the preset aspect ratio is determined according to the aspect ratio of the displayed image. The current aspect ratio of the image inspected by the borescope is 4:3. The middle 20% of the image is a rectangular area enclosed by two lines 10% of the image height above and below the horizontal center line of the image and 10% of the image width to the left and right of the vertical center line.

[0069] The image area where the center point of the nozzle recognition frame falls, the offset, and whether the nozzle recognition frame is larger than the diameter of the preset reference circle are used as evaluation indicators to evaluate the effectiveness of the detection process;

[0070] Determine whether the detection position of the borescope probe is effective based on the evaluation indicators:

[0071] When the center point of the nozzle identification frame falls within two image areas of different preset percentages, and the offset is less than the preset percentage, and the height of the nozzle identification frame is greater than the height of the reference circle, the detection process is determined to be effective;

[0072] When the center point of the nozzle identification frame does not fall within two image areas of different preset percentages, or the offset is greater than the preset percentage, or the height of the nozzle identification frame is less than the height of the reference circle, the detection process is determined to be invalid, and the position of the borescope probe is continued to be adjusted until the adjustment is stopped when the detection position of the borescope probe is valid.

[0073] When the detection position is valid, the nozzle image data obtained when it is valid is obtained as the image data to be detected, and the damage data of the nozzle is obtained based on the image data to be detected.

[0074] In the present invention, the evaluation result can be displayed in real time, or the entire detection video can be obtained and uploaded to the background for further judgment.

[0075] Among them, see Figure 5 , the diameter of the reference circle is 50% of the height of the image area.

[0076] In the present invention, the specific evaluation method is shown in Table 1.

[0077] Table 1:

[0078] Specifically, when the offset of the nozzle's angle deviation does not exceed 2%, and the nozzle center is located within 20% of the center of the screen, and the height of the nozzle identification frame is greater than the diameter of the reference circle, a full score of 10 points can be obtained.

[0079] If the nozzle angle deviation also does not exceed 2%, but the nozzle center position is slightly offset and is within 20%-50% of the center of the picture, other conditions are the same, 9 points can be obtained.

[0080] When the nozzle angle deviation is between 2% and 4%, and the nozzle center is still within the 20% area of ​​the center of the picture, and the height of the nozzle identification frame is greater than the diameter of the reference circle, the score is 8 points.

[0081] If the nozzle angle deviation is offset by 2% to 4%, the nozzle center position is within 20%-50% of the center of the picture, and the nozzle identification frame height is greater than the diameter of the reference circle, the score is 7 points.

[0082] When the offset of the nozzle angle deviation increases to between 4% and 6%, but the nozzle center remains within the 20% area of ​​the center of the picture and the height of the nozzle identification frame is greater than the diameter of the reference circle, 6 points can be obtained.

[0083] If the nozzle angle deviation is 4% to 6%, and the nozzle center position is within 20%-50% of the center of the picture, and the height of the nozzle identification frame is greater than the diameter of the reference circle, the score is 5 points.

[0084] In any case, if the nozzle angle deviation exceeds 6%, or the nozzle center position exceeds 50% of the center of the picture, or the height of the nozzle identification frame is less than the diameter of the reference circle, it will be considered unqualified and no points will be awarded.

[0085] When the detection position is valid, the nozzle image data obtained when it is valid is obtained as the image data to be detected, and the damage data of the nozzle is obtained based on the image data to be detected.

[0086] Damage data includes defects such as ablation, cracks, and coating loss. It also identifies the fuel nozzle primary orifice and the fuel nozzle outer ring (fuel nozzle heat shield after surface).

[0087] 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.

[0088] The second embodiment of the present invention provides a fuel nozzle detection process effectiveness evaluation system based on borescope technology, based on a fuel nozzle detection process evaluation method based on borescope technology, the system includes:

[0089] An identification frame acquisition module is configured to acquire an inspection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the inspection process image based on the outer contours of the nozzle and the swirler;

[0090] an offset calculation module, configured to obtain a center point of the nozzle identification frame and a center point of the swirler identification frame, and calculate an offset between the two center points;

[0091] Taking the center point of the image data as the starting point, frame two image areas with different preset percentages;

[0092] The image area where the center point of the nozzle identification frame falls, the offset, and whether the nozzle identification frame is larger than the diameter of the preset reference circle are used as evaluation indicators to evaluate the effectiveness of the detection process.

[0093] 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.

[0094] It should be noted that the fuel nozzle detection process effectiveness evaluation system based on borescope technology 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.

[0095] An electronic device according to a third embodiment of the present invention includes:

[0096] at least one processor; and

[0097] a memory communicatively connected to at least one of the processors; wherein,

[0098] The memory stores instructions that can be executed by the processor, and the instructions are used to be executed by the processor to implement the above-mentioned fuel nozzle detection process evaluation method based on borescope technology.

[0099] A computer-readable storage medium according to a fourth embodiment of the present invention stores computer instructions, and the computer instructions are used to be executed by the computer to implement the above-mentioned fuel nozzle detection process evaluation method based on borescope technology.

[0100] 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.

[0101] 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.

[0102] Reference below Figure 6 , which shows a schematic diagram of the structure of a computer system of a server for implementing the method, system, and device embodiments of the present application. Figure 6 The server shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0103] like Figure 6 As shown, the computer system includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage part 608 to the random access memory (RAM) 603. Various programs and data required for system operation are also stored in the RAM 603. The CPU 601, ROM 602 and RAM 603 are connected to each other through a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0104] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed so that a computer program read therefrom is installed into the storage section 608 as needed.

[0105] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 609, and / or installed from the removable medium 611. When the computer program is executed by the central processing unit (CPU) 601, the above-mentioned functions defined in the method of the present application are executed. It should be noted that the above-mentioned computer-readable medium of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, - but not limited to - an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection with one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, an apparatus or a device. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution system, an apparatus or a device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0106] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0107] 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.

[0108] The terms "first", "second", etc. are used to distinguish similar objects rather than to describe or indicate a particular order or sequence.

[0109] 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.

[0110] 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 fuel nozzle inspection process evaluation method based on borescope technology, characterized in that: The method includes: Acquire a detection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the detection process image based on the outer contours of the nozzle and the swirler; Obtaining the center point of the nozzle identification frame and the center point of the swirler identification frame, and calculating the offset between the two center points; Taking the center point of the image data as the starting point, two image areas with different preset percentages are framed in all directions based on a preset aspect ratio; The image area where the center point of the nozzle identification frame falls, the offset, and whether the nozzle identification frame is larger than the diameter of the preset reference circle are used as evaluation indicators to evaluate the effectiveness of the detection process.

2. The fuel nozzle inspection process evaluation method based on borescope technology according to claim 1 is characterized in that: The detection process image of the nozzle is obtained by inserting the borescope of the borescope probe device into the engine combustion chamber and aiming at the fuel nozzle to obtain the detection process image.

3. The fuel nozzle inspection process evaluation method based on borescope technology according to claim 1 is characterized in that: The nozzle identification frame and the cyclone identification frame are obtained by: The detection process image is video data, in which one piece of image data is sampled at a set time interval to obtain a nozzle identification frame and a swirler identification frame in the image data.

4. The fuel nozzle inspection process evaluation method based on borescope technology according to claim 1 is characterized in that: The offset is calculated as follows: μ=(b / a)×100%; Wherein, μ is the offset, b is the height of the nozzle identification frame, and a is the distance from the midline point of the nozzle identification frame to the center point of the cyclone identification frame.

5. The fuel nozzle inspection process evaluation method based on borescope technology according to claim 1 is characterized in that: The effectiveness of the testing process is evaluated by: Determine whether the detection position of the borescope probe is effective based on the evaluation indicators: When the center point of the nozzle identification frame falls within two image areas of different preset percentages, and the offset is less than the preset percentage, and the height of the nozzle identification frame is greater than the height of the reference circle, the detection process is determined to be effective; When the center point of the nozzle identification frame does not fall within two image areas of different preset percentages, or the offset is greater than the preset percentage, or the height of the nozzle identification frame is less than the height of the reference circle, the detection process is determined to be invalid, and the position of the borescope probe is continued to be adjusted until the adjustment is stopped when the detection position of the borescope probe is valid.

6. The fuel nozzle inspection process evaluation method based on borescope technology according to claim 5 is characterized in that: When the detection position is valid, the nozzle image data obtained when it is valid is obtained as the image data to be detected, and the damage data of the nozzle is obtained based on the image data to be detected.

7. The method for evaluating the fuel nozzle inspection process based on borescope technology according to claim 3 is characterized in that: If a plurality of nozzle identification frames are acquired from the image data, the areas of the plurality of nozzle identification frames are calculated, and the nozzle identification frame with the largest area is used as the nozzle identification frame to be determined.

8. A fuel nozzle inspection process effectiveness evaluation system based on borescope technology, based on a fuel nozzle inspection process evaluation method based on borescope technology according to any one of claims 1 to 7, characterized in that: The system includes: An identification frame acquisition module is configured to acquire an inspection process image of the nozzle, and acquire a nozzle identification frame and a swirler identification frame in the inspection process image based on the outer contours of the nozzle and the swirler; an offset calculation module, configured to obtain a center point of the nozzle identification frame and a center point of the swirler identification frame, and calculate an offset between the two center points; An image frame selection module is configured to use the center point of the image data as a starting point and frame two image areas of different preset percentages based on a preset aspect ratio. The effectiveness evaluation module is configured to use the image area where the center point of the nozzle identification frame falls, the offset and whether the nozzle identification frame is larger than the diameter of a preset reference circle as evaluation indicators to evaluate the effectiveness of the detection process.

9. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to at least one of the processors; wherein, The memory stores instructions executable by the processor, and the instructions are used to be executed by the processor to implement a fuel nozzle detection process evaluation method based on borescope technology as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to be executed by the computer to implement the fuel nozzle detection process evaluation method based on borescope technology as described in any one of claims 1-7.

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