A method and system for testing spray angle of an engine fuel nozzle

Abstract

The application relates to an engine fuel nozzle spray angle testing method and system, and relates to the field of engine nozzle quality detection. The method is applied to a detection platform. First, the ultrasonic wave emission end is controlled to emit a test ultrasonic wave to the mist body sprayed by the fuel nozzle. When the ultrasonic wave penetrates through the mist body, diffraction, reflection and scattering changes occur. At this time, the ultrasonic wave signal is collected by the ultrasonic wave receiving end, so that the characteristics of the mist body are recorded in the form of the ultrasonic wave signal. Then, the ultrasonic wave signal is pretreated, and the ultrasonic wave signal curve obtained after the pretreatment is matched with a preset ultrasonic wave signal curve database, so that the current spray angle of the fuel nozzle is extracted. Finally, whether the fuel nozzle is qualified is determined according to a preset spray angle range. Therefore, the ultrasonic wave test has lower requirements for the test environment, so that the detection error caused by environmental factors is reduced, and the applicability and stability are higher.

Description

Technical Field

[0001] This application relates to the technical field of engine nozzle quality testing, specifically to a method and system for testing the spray angle of an engine fuel nozzle. Background Technology

[0002] The quality of aircraft engine fuel nozzles directly affects the overall flight performance of the aircraft. Therefore, detecting abnormalities in aircraft engine fuel nozzles is of paramount importance in ensuring safe flight.

[0003] Currently, the quality inspection of aircraft engine fuel nozzles mainly adopts image recognition. This method uses a high-definition camera to capture images of the fuel mist when the fuel nozzle is working, and then performs image cropping and image feature extraction on the fuel mist images to obtain equipment parameters such as the spray angle, uniformity, and particle size of the fuel nozzle. Finally, it determines whether the equipment parameters are qualified.

[0004] However, image recognition has high requirements for the lighting conditions during shooting, and detection errors are often caused by lighting issues. Summary of the Invention

[0005] Image recognition has high requirements for the lighting conditions during shooting, and detection errors are often caused by lighting issues. This application provides a method and system for testing the spray angle of engine fuel nozzles.

[0006] In a first aspect, this application provides a method for testing the spray angle of an engine fuel injector, applied to a testing platform. The method includes: when the fuel injector is spraying, controlling an ultrasonic transmitter to emit test ultrasonic waves towards the fuel injector; after a preset time period, acquiring the ultrasonic signal received by an ultrasonic receiver; preprocessing the ultrasonic signal to generate an ultrasonic signal curve; matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve, wherein the preset ultrasonic signal curve database includes the correspondence between the ultrasonic signal curve and the spray angle of the fuel injector; if the spray angle corresponding to the ultrasonic signal curve meets the preset spray angle range, then the spray angle of the fuel injector is determined to be qualified.

[0007] By employing the above technical solution, the ultrasonic transmitter first emits test ultrasonic waves towards the mist sprayed from the fuel nozzle. As the ultrasonic waves pass through the mist, they undergo diffraction, reflection, and scattering. The ultrasonic receiver then collects the ultrasonic signals, recording the characteristics of the mist in the form of ultrasonic signals for subsequent analysis of the spray angle. Next, the ultrasonic signals are preprocessed, and the resulting ultrasonic signal curve is matched against a preset ultrasonic signal curve database to extract the current spray angle of the fuel nozzle. Finally, the quality of the fuel nozzle is determined based on a preset spray angle range. Therefore, the ultrasonic testing method described above has lower requirements for the testing environment, reducing detection errors caused by environmental factors and thus exhibiting higher applicability and stability.

[0008] Secondly, this application provides an engine fuel nozzle spray angle testing system. The system is a testing platform, which includes an acquisition module and a processing module, wherein:

[0009] The acquisition module is used to control the ultrasonic transmitter to emit test ultrasonic waves towards the fuel nozzle when the fuel nozzle is spraying; after a preset time period, it acquires the ultrasonic signal received by the ultrasonic receiver.

[0010] The processing module is used to preprocess the ultrasonic signal to generate an ultrasonic signal curve; match the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve. The preset ultrasonic signal curve database includes the correspondence between ultrasonic signal curves and the spray angle of fuel nozzles; if the spray angle corresponding to the ultrasonic signal curve meets the preset spray angle range, the spray angle of the fuel nozzle is determined to be qualified.

[0011] Optionally, before matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve, the construction of the preset ultrasonic signal curve database is specifically as follows:

[0012] The acquisition module uses an ultrasonic testing device to test the ultrasonic signals of the sample fuel nozzle at multiple spray angles. The ultrasonic testing device includes an ultrasonic transmitter and an ultrasonic receiver. The sample fuel nozzle is a qualified fuel nozzle of the same model as the sample fuel nozzle. The processing module preprocesses the ultrasonic signal at the first spray angle to obtain a first ultrasonic signal curve. The first spray angle is any one of the multiple spray angles of the sample fuel nozzle. The first ultrasonic signal curve and the first spray angle are established as a correspondence, and the correspondence is stored in a preset ultrasonic signal curve database.

[0013] By employing the above technical solution, ultrasonic signals from a normal sample fuel nozzle of the same model as the one being tested are collected at multiple spray angles. This yields the normal ultrasonic signals of the fuel nozzle at different spray angles. Then, the same preprocessing method is used to preprocess the ultrasonic signals at multiple spray angles, resulting in ultrasonic curves corresponding to each spray angle. Finally, the correspondence between the ultrasonic curves and the ultrasonic signals is constructed into a pre-defined ultrasonic signal curve database. This reduces the computational workload of converting the ultrasonic signal curves of the fuel nozzle under test into spray angles, thus improving the detection efficiency of ultrasonic testing.

[0014] Optionally, the test ultrasound consists of multiple ultrasounds with different signal intensities, where each ultrasound with a signal intensity corresponds to a preset sub-time period, and the preset time period consists of multiple preset sub-time periods.

[0015] By adopting the above technical solution, the atomization characteristics of the fuel nozzle are tested using a test ultrasonic wave composed of ultrasonic waves with different signal intensities, thereby finding a high-quality ultrasonic signal and improving the accuracy of measuring the spray angle of the fuel nozzle.

[0016] Optionally, after a preset time period, the ultrasonic signal received by the ultrasonic receiver is acquired, specifically including:

[0017] The acquisition module acquires multiple ultrasonic signals within a first preset sub-time period, which is any one of the multiple preset sub-time periods. An ultrasonic signal within the first preset sub-time period represents the completion of one ultrasonic test. The processing module averages the multiple ultrasonic signals to obtain the target ultrasonic signal for the first preset sub-time period. If the signal-to-noise ratio (SNR) of the target ultrasonic signal in the first preset sub-time period is greater than the SNR of the target ultrasonic signal in the second preset sub-time period, then the target ultrasonic signal in the first preset sub-time period is used as the ultrasonic signal received by the ultrasonic receiver. The second preset sub-time period is any one of the multiple preset sub-time periods.

[0018] By adopting the above technical solution, the preset time period is divided into multiple preset sub-time periods. In each preset sub-time period, multiple ultrasonic tests with the same signal strength are performed multiple times to obtain multiple ultrasonic signals. Then, the multiple ultrasonic signals are averaged and fused into a single target ultrasonic signal. Finally, the signal-to-noise ratios of the target ultrasonic signals from multiple preset sub-time periods are compared, and the target ultrasonic signal with better quality is selected for subsequent preprocessing to improve the accuracy of the final measurement of the spray angle of the fuel nozzle.

[0019] Optionally, the processing module identifies the ultrasonic type of the ultrasonic signal; matches the ultrasonic type of the ultrasonic signal with a preset ultrasonic preprocessing library to obtain the preprocessing method corresponding to the ultrasonic type of the ultrasonic signal. The preset ultrasonic preprocessing library includes the correspondence between ultrasonic types and preprocessing methods; and preprocesses the ultrasonic signal using the preprocessing method corresponding to the ultrasonic type of the ultrasonic signal to obtain the ultrasonic signal curve.

[0020] By adopting the above technical solution, since ultrasonic signals undergo diffraction, reflection, and scattering when passing through the fog, resulting in different waveform types, the ultrasonic signal can be identified as the ultrasonic type and then a suitable preprocessing method can be matched to the ultrasonic signal to improve the data quality of the ultrasonic signal curve and thus improve the measurement accuracy of the spray angle.

[0021] Optionally, after matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve, the process further includes: if the spray angle corresponding to the ultrasonic signal curve does not meet the preset spray angle range, the processing module determines that the spray angle of the fuel nozzle is unqualified; matching the spray angle of the fuel nozzle with a preset fault table to obtain the faulty component corresponding to the spray angle of the fuel nozzle, and displaying it to the user, wherein the preset fault table includes the correspondence between the spray angle and the faulty component.

[0022] By adopting the above technical solution, when the spray angle of the fuel nozzle is not up to standard, the current spray angle can be matched with a preset fault table to identify the faulty components that may cause the fuel nozzle spray angle to be not up to standard, thus helping maintenance personnel to quickly troubleshoot the cause of the fault.

[0023] Optionally, the liquid mist sprayed by the fuel nozzle may be a non-flammable liquid.

[0024] By adopting the above technical solution, since ultrasonic waves may cause oil mist to explode, in order to ensure safety during the maintenance process, the oil mist in the actual working process is replaced with a similar non-flammable liquid, thereby increasing the safety of the testing process.

[0025] Thirdly, this application provides an electronic device including a processor, a memory, a user interface, and a network interface. The memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory to cause the electronic device to perform the method as described in any one of the first aspects.

[0026] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed, perform the method described in any one of the first aspects.

[0027] In summary, one or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0028] 1. First, the ultrasonic transmitter emits test ultrasonic waves towards the mist sprayed from the fuel nozzle. As the ultrasonic waves pass through the mist, they undergo diffraction, reflection, and scattering. The ultrasonic receiver then collects the ultrasonic signals, recording the characteristics of the mist as ultrasonic signals for subsequent analysis of the spray angle. Next, the ultrasonic signals are preprocessed, and the resulting ultrasonic signal curve is matched against a pre-defined ultrasonic signal curve database to extract the current spray angle of the fuel nozzle. Finally, the quality of the fuel nozzle is determined based on a pre-defined spray angle range. Therefore, the ultrasonic testing method described above has low requirements for the testing environment, reducing detection errors caused by environmental factors and thus offering higher applicability and stability.

[0029] 2. Divide the preset time period into multiple preset sub-time periods, and then perform multiple ultrasonic tests with the same signal strength in each preset sub-time period to obtain multiple ultrasonic signals. Then, average the multiple ultrasonic signals and fuse them into a single target ultrasonic signal. Finally, compare the signal-to-noise ratio of the target ultrasonic signals from multiple preset sub-time periods to select the target ultrasonic signal with better quality for subsequent preprocessing, thereby improving the accuracy of the final measurement of the spray angle of the fuel nozzle. Attached Figure Description

[0030] Figure 1 This is a schematic flowchart of an engine fuel nozzle spray angle testing method provided in an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of a scenario for testing the spray angle of an engine fuel nozzle, provided in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the structure of an engine fuel nozzle spray angle testing system provided in an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 301, acquisition module; 302, processing module; 400, electronic device; 401, processor; 402, communication bus; 403, user interface; 404, network interface; 405, memory. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0036] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0037] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0038] As a common power supply device for aircraft engines, fuel nozzles directly affect the flight performance of an aircraft. Any abnormality in the fuel nozzles can seriously threaten the safety of the aircraft during flight. Therefore, a quality inspection of the fuel nozzles is often required before the aircraft begins flight.

[0039] Currently, the quality inspection of aircraft engine fuel nozzles mainly adopts image recognition. This method uses a high-definition camera to capture images of the fuel mist when the fuel nozzle is working, and then performs image cropping and image feature extraction on the fuel mist images to obtain equipment parameters such as the spray angle, uniformity, and particle size of the fuel nozzle. Finally, it determines whether the equipment parameters are qualified.

[0040] However, the above image recognition methods have high requirements for the lighting conditions during shooting, and detection errors are often caused by lighting issues.

[0041] To address the aforementioned problems, this application provides a method for testing the spray angle of an engine fuel nozzle, applied to a testing platform, such as... Figure 1 As shown, the method includes steps S101 to S105.

[0042] S101. When the fuel nozzle sprays, control the ultrasonic transmitter to emit test ultrasonic waves towards the fuel nozzle.

[0043] In the above steps, the ultrasonic transmitter consists of multiple ultrasonic transmitters, arranged to cover the mist within a preset range. The ultrasonic transmitter then emits test ultrasonic waves towards the fuel nozzle, and the ultrasonic signal is received by an ultrasonic receiver parallel to the transmitter. Figure 2 As shown, Figure 2 This is a schematic diagram illustrating a scenario for testing the spray angle of an engine fuel nozzle, as provided in an embodiment of this application. The diagram includes a fuel nozzle spraying fuel, an ultrasonic transmitter, and an ultrasonic receiver. It should be noted that since using ultrasonic waves to measure fuel mist may lead to fuel mist explosion, the liquid sprayed by the fuel nozzle in this application is a non-flammable liquid with similar properties to the fuel mist, preferably a simulated fuel mixture of sugar alcohol and water, to ensure safety during the test.

[0044] In one possible implementation, when the ultrasonic transmitter emits test ultrasonic waves towards the fuel nozzle, the quality of the ultrasonic signals will differ depending on the signal intensity of the ultrasonic waves as they pass through the mist. For example, strong ultrasonic waves, due to their higher energy and less obstruction effect, tend to have less signal attenuation and better quality when passing through the spray. However, excessively high-intensity ultrasonic signals may fail to reflect the characteristics of the mist. Conversely, weak ultrasonic waves experience greater obstruction and more significant signal attenuation when passing through the spray, making them more likely to reflect the characteristics of the mist. However, excessively low-intensity ultrasonic signals will be absorbed by the mist scattering, leading to signal distortion. Therefore, to obtain ultrasonic signals that better reflect the characteristics of the mist, the test ultrasonic waves emitted by the ultrasonic transmitter towards the fuel nozzle consist of multiple ultrasonic signals with different signal intensities. Each signal intensity corresponds to a preset sub-time period, and ultrasonic signals of the same signal intensity are emitted multiple times within a preset sub-time period.

[0045] S102. After a preset time period, acquire the ultrasonic signal received by the ultrasonic receiver.

[0046] In the above steps, the preset time period consists of multiple preset sub-time periods. After the ultrasonic transmitter emits test ultrasonic waves containing ultrasonic signals of different signal intensities, the ultrasonic receiver receives multiple ultrasonic signals from each preset sub-time period. Taking the first preset sub-time period as an example, the multiple ultrasonic signals received within the first preset sub-time period represent one ultrasonic transmission and reception cycle. At this point, the multiple ultrasonic signals from the first preset sub-time period are averaged to fuse them into a single target ultrasonic signal. The averaging process involves calculating the average of the values ​​of multiple ultrasonic signals at the same time point and using this average as the value at that time point to construct a new ultrasonic signal. To select the ultrasonic signal that best reflects the characteristics of the fog from multiple ultrasonic signals of different signal intensities, the signal-to-noise ratio (SNR) of the target ultrasonic signal within each preset sub-time period is calculated, and the target ultrasonic signal with the highest SNR is selected as the ultrasonic signal for further processing.

[0047] S103. Preprocess the ultrasonic signal to generate an ultrasonic signal curve.

[0048] In the above steps, after obtaining a high-quality ultrasonic signal, the ultrasonic waves undergo diffraction, reflection, and scattering as they pass through the mist, resulting in different waveform types. For example, if a certain area of ​​the spray flow is relatively homogeneous, a simple harmonic waveform may be formed; if the spray contains multiple vortex centers, a complex multi-peak waveform may be formed; if the spray edge contains stray structures, an amorphous pulse waveform may be formed. Therefore, corresponding preprocessing methods are required for ultrasonic signals of different waveforms to obtain a high-quality ultrasonic signal curve. Specifically, this process involves: identifying the ultrasonic type of the current ultrasonic signal; matching the ultrasonic type of the current ultrasonic signal with a preset ultrasonic preprocessing library to obtain the corresponding preprocessing method. Preprocessing methods include Fourier transform, wavelet decomposition, and cluster analysis. The preset ultrasonic preprocessing library stores a pre-built correspondence between ultrasonic types and preprocessing methods. Finally, the current ultrasonic signal is preprocessed according to the preprocessing method corresponding to the current ultrasonic signal to obtain the ultrasonic signal curve. It should also be noted that preprocessing includes filtering and amplification to further improve the quality of the ultrasonic signal curve.

[0049] S104. Match the ultrasonic signal curve with the preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve. The preset ultrasonic signal curve database includes the correspondence between the ultrasonic signal curve and the spray angle of the fuel nozzle.

[0050] In the above steps, since the ultrasonic signal curve reflects the characteristics of the mist, which can be understood as the uniformity, particle size, and spray angle of the mist, a preset ultrasonic signal curve database is constructed by establishing the correspondence between the ultrasonic signal curve and the spray angle of the fuel nozzle. The ultrasonic signal curve is then matched with this database to obtain mist characteristic data such as spray angle, particle size, and uniformity corresponding to the ultrasonic signal curve. Specifically, the construction process of the preset ultrasonic signal curve database is as follows: First, a qualified fuel nozzle of the same model as the current fuel nozzle is selected as a sample fuel nozzle. Then, an ultrasonic testing device is used to test the ultrasonic signals of the sample fuel nozzle at multiple spray angles. The ultrasonic testing device includes an ultrasonic transmitter and an ultrasonic receiver, which refer to the same ultrasonic transmitter and receiver in this application. Next, the ultrasonic signals at multiple spray angles are preprocessed to obtain ultrasonic signal curves corresponding to multiple spray angles. Finally, a correspondence is established between the spray angle and the ultrasonic signal, and stored in the preset ultrasonic signal curve database. This preset ultrasonic signal curve database reduces the computational workload of processing the ultrasonic signal curve of the fuel nozzle under test into a spray angle, thus improving the detection efficiency of ultrasonic testing.

[0051] S105. If the spray angle corresponding to the ultrasonic signal curve meets the preset spray angle range, then the spray angle of the fuel nozzle is determined to be qualified.

[0052] In the above steps, the preset spray angle range can be understood as the design value of the spray angle of a normal fuel injector, which is obtained through multiple experiments by research institutions. Therefore, by judging whether the spray angle corresponding to the ultrasonic signal curve is within the preset spray angle range, the qualification of the fuel injector's spray angle can be determined. In addition to testing the fuel injector's spray angle, the uniformity and particle size of the fuel spray can also be tested. The method is the same as the above-mentioned test method for the fuel injector's spray angle, and will not be elaborated further.

[0053] In one possible implementation, if the spray angle corresponding to the ultrasonic signal curve is within a preset spray angle range, the fuel nozzle's spray angle is determined to be qualified; if the spray angle corresponding to the ultrasonic signal curve is not within the preset spray angle range, the fuel nozzle's spray angle is determined to be unqualified. In this case, the fuel nozzle's spray angle is matched against a preset fault table. This preset fault table stores the correspondence between spray angles and faulty components, constructed based on historical fault occurrence experience. Therefore, the matching result is the faulty component corresponding to the fuel nozzle's spray angle, which is displayed to the user to help maintenance personnel quickly troubleshoot the cause of the fault. Furthermore, to further accurately troubleshoot the cause of the fault, the uniformity and particle size of the mist can also be combined for judgment.

[0054] This application also provides an engine fuel nozzle spray angle testing system. The system is a testing platform, which includes an acquisition module 301 and a processing module 302, wherein:

[0055] The acquisition module 301 is used to control the ultrasonic transmitter to emit test ultrasonic waves towards the fuel nozzle when the fuel nozzle is spraying; and to acquire the ultrasonic signal received by the ultrasonic receiver after a preset time period.

[0056] The processing module 302 is used to preprocess the ultrasonic signal to generate an ultrasonic signal curve; match the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve. The preset ultrasonic signal curve database includes the correspondence between the ultrasonic signal curve and the spray angle of the fuel nozzle; if the spray angle corresponding to the ultrasonic signal curve meets the preset spray angle range, then the spray angle of the fuel nozzle is determined to be qualified.

[0057] In one possible implementation, before matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve, the construction of the preset ultrasonic signal curve database specifically involves:

[0058] The acquisition module 301 uses an ultrasonic testing device to test the ultrasonic signals of the sample fuel nozzle at multiple spray angles. The ultrasonic testing device includes an ultrasonic transmitter and an ultrasonic receiver. The sample fuel nozzle is a qualified fuel nozzle of the same model as the fuel nozzle. The processing module 302 preprocesses the ultrasonic signal at the first spray angle to obtain a first ultrasonic signal curve. The first spray angle is any one of the multiple spray angles of the sample fuel nozzle. The first ultrasonic signal curve and the first spray angle are established as a correspondence, and the correspondence is stored in a preset ultrasonic signal curve database.

[0059] In one possible implementation, the test ultrasound consists of multiple ultrasounds with different signal intensities, wherein each ultrasound with a signal intensity corresponds to a preset sub-time period, and the preset time period consists of multiple preset sub-time periods.

[0060] In one possible implementation, after a preset time period, acquiring the ultrasonic signal received by the ultrasonic receiver specifically includes:

[0061] The acquisition module 301 acquires multiple ultrasonic signals within a first preset sub-time period, where the first preset sub-time period is any one of the multiple preset sub-time periods. An ultrasonic signal within the first preset sub-time period represents the completion of one ultrasonic test. The processing module 302 averages the multiple ultrasonic signals to obtain the target ultrasonic signal for the first preset sub-time period. If the signal-to-noise ratio (SNR) of the target ultrasonic signal in the first preset sub-time period is greater than the SNR of the target ultrasonic signal in the second preset sub-time period, then the target ultrasonic signal in the first preset sub-time period is used as the ultrasonic signal received by the ultrasonic receiver. The second preset sub-time period is any one of the multiple preset sub-time periods.

[0062] In one possible implementation, the processing module 302 identifies the ultrasonic type of the ultrasonic signal; matches the ultrasonic type of the ultrasonic signal with a preset ultrasonic preprocessing library to obtain the preprocessing method corresponding to the ultrasonic type of the ultrasonic signal, wherein the preset ultrasonic preprocessing library includes the correspondence between ultrasonic types and preprocessing methods; and preprocesses the ultrasonic signal using the preprocessing method corresponding to the ultrasonic type of the ultrasonic signal to obtain an ultrasonic signal curve.

[0063] In one possible implementation, after matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain the spray angle corresponding to the ultrasonic signal curve, the process further includes: if the spray angle corresponding to the ultrasonic signal curve does not meet the preset spray angle range, the processing module 302 determines that the spray angle of the fuel nozzle is unqualified; matching the spray angle of the fuel nozzle with a preset fault table to obtain the faulty component corresponding to the spray angle of the fuel nozzle, and displaying it to the user, wherein the preset fault table includes the correspondence between the spray angle and the faulty component.

[0064] In one possible implementation, the liquid mist sprayed by the fuel nozzle is a non-flammable liquid.

[0065] It should be noted that the above embodiments of the apparatus are 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 internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0066] This application also discloses an electronic device. (See reference...) Figure 4 , Figure 4This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application. The electronic device 400 may include: at least one processor 401, at least one network interface 404, a user interface 403, a memory 405, and at least one communication bus 402.

[0067] The communication bus 402 is used to enable communication between these components.

[0068] The user interface 403 may include a display screen and a camera. Optionally, the user interface 403 may also include a standard wired interface and a wireless interface.

[0069] The network interface 404 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface).

[0070] The processor 401 may include one or more processing cores. The processor 401 connects to various parts of the server using various interfaces and lines, and performs various server functions and processes data by running or executing instructions, programs, code sets, or instruction sets stored in memory 405, and by calling data stored in memory 405. Optionally, the processor 401 may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 401 may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the content required for display; and the modem handles wireless communication. It is understood that the modem may also be implemented as a separate chip without being integrated into the processor 401.

[0071] The memory 405 may include random access memory (RAM) or read-only memory. Optionally, the memory 405 may include a non-transitory computer-readable storage medium. The memory 405 may be used to store instructions, programs, code, code sets, or instruction sets. The memory 405 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), instructions for implementing the above-described method embodiments, etc.; the data storage area may store data involved in the above-described method embodiments, etc. Optionally, the memory 405 may also be at least one storage device located remotely from the aforementioned processor 401. (Refer to...) Figure 4 The memory 405, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an application for testing the spray angle of an engine fuel nozzle.

[0072] exist Figure 4 In the illustrated electronic device 400, the user interface 403 is mainly used to provide an input interface for the user and acquire user input data; while the processor 401 can be used to call an application program for testing engine fuel nozzle spray angle stored in the memory 405. When executed by one or more processors 401, the electronic device 400 performs one or more of the methods described in the above embodiments. It should be noted that, for the foregoing method embodiments, for the sake of simplicity, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0073] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0074] In the various embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between apparatuses or units may be electrical or other forms.

[0075] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0076] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0077] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, portable hard drives, magnetic disks, or optical disks.

[0078] The above description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Other embodiments of this disclosure will be readily apparent to those skilled in the art upon consideration of the specification and the disclosure of practical truths.

[0079] This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described in this disclosure. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A method of testing a spray angle of an engine fuel nozzle, the method comprising: The method is applied to a detection platform, and the method comprises: When the fuel nozzle sprays, a test ultrasonic wave is emitted from the ultrasonic wave emission end to the fuel nozzle; After a preset time period, an ultrasonic wave signal received by the ultrasonic wave receiving end is acquired; The ultrasonic wave signal is preprocessed to generate an ultrasonic wave signal curve; The ultrasonic wave signal curve is matched with a preset ultrasonic wave signal curve database to obtain a spray angle corresponding to the ultrasonic wave signal curve, and the preset ultrasonic wave signal curve database comprises a corresponding relationship between an ultrasonic wave signal curve and a spray angle of a fuel nozzle; If the spray angle corresponding to the ultrasonic wave signal curve satisfies a preset spray angle range, it is determined that the spray angle of the fuel nozzle is qualified.

2. The method of claim 1, wherein, Before the matching of the ultrasonic wave signal curve with the preset ultrasonic wave signal curve database to obtain the spray angle corresponding to the ultrasonic wave signal curve, the preset ultrasonic wave signal curve database is constructed as follows: A sample fuel nozzle is tested at multiple spray angles by using an ultrasonic testing device, wherein the ultrasonic testing device comprises the ultrasonic wave emission end and the ultrasonic wave receiving end, and the sample fuel nozzle is a qualified fuel nozzle of the same type as the fuel nozzle; An ultrasonic wave signal at a first spray angle is preprocessed to obtain a first ultrasonic wave signal curve, and the first spray angle is any one of the multiple spray angles of the sample fuel nozzle; The first ultrasonic wave signal curve and the first spray angle are constructed as a corresponding relationship, and the corresponding relationship is stored in the preset ultrasonic wave signal curve database.

3. The method of claim 1, wherein, The test ultrasonic wave is composed of multiple ultrasonic waves with different signal intensities, wherein one signal intensity ultrasonic wave corresponds to one preset sub-time period, and the preset time period is composed of multiple preset sub-time periods.

4. The method of claim 3, wherein, After the preset time period, the ultrasonic wave signal received by the ultrasonic wave receiving end is acquired, specifically including: Multiple ultrasonic wave signals in a first preset sub-time period are acquired, and the first preset sub-time period is any one of the multiple preset sub-time periods, wherein one ultrasonic wave signal in the first preset sub-time period represents one ultrasonic wave test; Multiple ultrasonic wave signals are averaged to obtain a target ultrasonic wave signal of the first preset sub-time period; If a signal-to-noise ratio of the target ultrasonic wave signal of the first preset sub-time period is greater than a signal-to-noise ratio of a target ultrasonic wave signal of a second preset sub-time period, the target ultrasonic wave signal of the first preset sub-time period is taken as the ultrasonic wave signal received by the ultrasonic wave receiving end, and the second preset sub-time period is any one of the multiple preset sub-time periods.

5. The method of claim 1, wherein, The preprocessing of the ultrasonic wave signal to generate the ultrasonic wave signal curve specifically includes: The ultrasonic wave type of the ultrasonic wave signal is identified; The ultrasonic wave type of the ultrasonic wave signal is matched with a preset ultrasonic wave preprocessing library to obtain a preprocessing mode corresponding to the ultrasonic wave type of the ultrasonic wave signal, and the preset ultrasonic wave preprocessing library comprises a corresponding relationship between an ultrasonic wave type and a preprocessing mode; The ultrasonic signal is preprocessed by using a preprocessing mode corresponding to an ultrasonic type of the ultrasonic signal, to obtain an ultrasonic signal curve.

6. The method of claim 1, wherein, After matching the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain a spray angle corresponding to the ultrasonic signal curve, the method further includes: If the spray angle corresponding to the ultrasonic signal curve does not satisfy a preset spray angle range, it is determined that the spray angle of the fuel nozzle is unqualified. The spray angle of the fuel nozzle is matched with a preset fault table to obtain a fault component corresponding to the spray angle of the fuel nozzle, and the fault component is displayed to a user, wherein the preset fault table includes a corresponding relationship between the spray angle and the fault component.

7. The method of claim 1, wherein, The fuel nozzle sprays a non-flammable liquid.

8. An engine fuel nozzle spray angle testing system, characterized by, The system is a detection platform, and the detection platform includes an acquisition module (301) and a processing module (302), wherein: The acquisition module (301) is configured to control an ultrasonic emission end to emit a test ultrasonic wave to the fuel nozzle when the fuel nozzle sprays; and acquire an ultrasonic signal received by an ultrasonic receiving end after a preset time period. The processing module (302) is configured to preprocess the ultrasonic signal to generate an ultrasonic signal curve; match the ultrasonic signal curve with a preset ultrasonic signal curve database to obtain a spray angle corresponding to the ultrasonic signal curve, wherein the preset ultrasonic signal curve database includes a corresponding relationship between an ultrasonic signal curve and a spray angle of a fuel nozzle; and if the spray angle corresponding to the ultrasonic signal curve satisfies a preset spray angle range, it is determined that the spray angle of the fuel nozzle is qualified.

9. An electronic device, comprising: The electronic device (400) includes a processor (401), a memory (405), a user interface (403), and a network interface (404), the memory (405) is configured to store instructions, the user interface (403) and the network interface (404) are configured to communicate with other devices, and the processor (401) is configured to execute the instructions stored in the memory (405) to enable the electronic device (400) to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed, perform the method of any one of claims 1 to 7.

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