Fuel nozzle oscillation frequency measurement method, system, equipment, medium and product

Abstract

The present disclosure relates to the field of industrial information and data processing technology, and in particular, provides a method, system, device, medium and product for measuring the oscillation frequency of a fuel nozzle, wherein the method comprises: obtaining measurement data of a fuel nozzle from a laser; wherein the measurement data comprises at least one of the following: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle and a distance between the laser and the fuel nozzle; determining a target injection angle of the fuel nozzle based on the measurement data; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured; controlling the fuel nozzle to operate at the target injection angle, and during operation, determining an interference signal between the reflected laser light of the laser and the incident laser light; and determining the oscillation frequency of the fuel nozzle based on the interference signal.

Description

Technical Field

[0001] The present disclosure relates to the field of industrial information and data processing technology, and in particular to a method, system, device, medium and product for measuring the oscillation frequency of a fuel nozzle. Background Art

[0002] With the rapid development of aero-engines, the oscillation frequency of self-excited swept fuel nozzles is becoming increasingly important for improving the combustion efficiency of engines. By studying and analyzing the working characteristics of fuel nozzles, we can understand their application potential in aero-engines and aerospace power plants, and provide strong support for improving fuel atomization performance and optimizing oil-gas mixing uniformity. (Wang Shiqi, Wenquan, Jia Zhigang, et al. Experimental study on afterburner combustion efficiency based on self-excited swept nozzles [J]. Acta Aeronautica Sinica, 2024; [1] Wang Shiqi, Wenquan. Research on a new self-excited swept nozzle and its working characteristics [J]. Propulsion Technology, 2023, 44(10):2210072.).

[0003] Prior art typically uses high-speed imaging technology to position the liquid jet emitted by a fuel nozzle between a high-intensity illumination source and a high-speed camera. The camera then continuously captures transient shadow images of the fuel nozzle over multiple cycles at a high frame rate. These transient shadow images are then analyzed to determine the nozzle's oscillation frequency. However, due to the high cost of high-speed cameras and the fact that they capture continuous transient shadow images, complex processing and analysis of the large amount of image data are required to determine the nozzle's oscillation frequency. This results in a complex and time-consuming process for determining the oscillation frequency. Summary of the Invention

[0004] The present disclosure is proposed in view of the above problems. The present disclosure provides a method for measuring the oscillation frequency of a fuel nozzle, comprising:

[0005] Acquiring laser measurement data of a fuel nozzle; wherein the measurement data includes: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle, and a distance between the laser and the fuel nozzle;

[0006] Determining a target injection angle of the fuel nozzle based on the measurement data; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured;

[0007] controlling the fuel nozzle to operate at the target injection angle, and during operation, determining an interference signal between the reflected laser light and the incident laser light of the laser;

[0008] An oscillation frequency of the fuel nozzle is determined based on the interference signal.

[0009] Furthermore, according to another embodiment of one aspect of the present disclosure, determining the target injection angle of the fuel nozzle based on the measurement data includes:

[0010] Performing calculations on the measurement data to obtain target calculation data; wherein the target calculation data includes: a focus position range of the incident laser spot, a target angle between the incident laser and the injection angle of the fuel nozzle, and a distance range between the laser and the fuel nozzle;

[0011] Based on the target calculation data, a target injection angle of the fuel injection nozzle is determined.

[0012] In addition, according to another embodiment of one aspect of the present disclosure, performing operations on the measurement data to obtain target operation data includes:

[0013] Determining a vertical focusing range of the laser spot based on the throat width;

[0014] Based on the current injection angle, determining a focusing range of the laser spot in the horizontal direction;

[0015] The focus position range of the laser spot and the focus range of the laser spot in the horizontal direction are determined as the focus position range of the incident laser spot.

[0016] In addition, according to another embodiment of one aspect of the present disclosure, determining the focusing range of the laser spot in the horizontal direction based on the current injection angle includes:

[0017] Determine the focusing angle of the preset horizontal light spot;

[0018] Based on the preset focusing angle of the horizontal light spot and the current spraying angle, a focusing range of the laser light spot in the horizontal direction is determined.

[0019] Furthermore, according to another embodiment of one aspect of the present disclosure, determining the target injection angle of the fuel nozzle based on the target operation data includes:

[0020] determining a first injection angle of the fuel nozzle when the incident laser spot focus position is within the incident laser spot focus position range and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle;

[0021] When the fuel nozzle is at the first injection angle, determining whether the laser meets a target measurement condition; wherein the target measurement condition is that the angle between the incident laser and the first injection angle is within the preset angle range;

[0022] In a case where it is determined that the laser satisfies the target measurement condition, the first injection angle is determined as a target injection angle.

[0023] In addition, in another embodiment according to one aspect of the present disclosure, the method further includes:

[0024] When it is determined that the laser does not meet the target measurement condition, adjusting the first injection angle to obtain an adjusted first injection angle;

[0025] In a case where it is determined that the adjusted first injection angle satisfies the target measurement condition, the adjusted first injection angle is determined as the target injection angle.

[0026] Furthermore, in another embodiment according to one aspect of the present disclosure, determining the oscillation frequency of the fuel nozzle based on the interference signal includes:

[0027] performing noise reduction processing on the interference signal to obtain a noise reduction signal;

[0028] Performing Fourier transform processing on the noise reduction signal to obtain a Fourier transform signal;

[0029] extracting signal features of the Fourier transform signal;

[0030] Based on the signal characteristic, an oscillation frequency of the fuel nozzle is determined.

[0031] According to another aspect of the present disclosure, a fuel nozzle oscillation frequency measurement system is provided, comprising: a laser, a photoelectric conversion detection device, a signal acquisition system, and a signal processing system;

[0032] Wherein, the laser is used to emit incident laser light toward the liquid jet emitted from the fuel nozzle; the signal acquisition system is used to obtain measurement data of the laser on the fuel nozzle; wherein, the measurement data include: the current injection angle of the fuel nozzle, the throat width of the fuel nozzle and the distance between the laser and the fuel nozzle; based on the measurement data, the target injection angle of the fuel nozzle is determined; wherein, the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured; the photoelectric conversion detection device is used to control the fuel nozzle to operate at the target injection angle, and during operation, determine the interference signal between the reflected laser of the laser and the incident laser; the signal processing system is used to determine the oscillation frequency of the fuel nozzle based on the interference signal.

[0033] According to yet another aspect of the present disclosure, a computer device is provided, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement steps of a method for determining a log template.

[0034] According to another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the steps of a method for determining a log template are implemented.

[0035] As will be described in detail below, according to the method, system, device, medium and product for measuring the oscillation frequency of the fuel nozzle of the embodiment of the present disclosure. By determining the target injection angle of the fuel nozzle, an interference signal is generated between the incident laser and the reflected laser of the laser. Thus, the interference signal can be processed to obtain the oscillation frequency of the fuel nozzle. As described above, there is no need to use a high-speed camera, which reduces the measurement cost. In addition, the amount of data to be processed is small, and only the interference signal needs to be processed. The oscillation frequency determination process of this solution is simple, which improves time efficiency. In addition, the user can also determine the real-time oscillation frequency of the fuel nozzle and observe whether there is a problem with the fuel nozzle based on the real-time oscillation frequency, so that the user can deal with it in time if there is a problem with the fuel nozzle.

[0036] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other purposes, features, and advantages of the present disclosure will become more apparent through a more detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and are not intended to limit the present disclosure. In the drawings, the same reference numerals generally represent the same components or steps.

[0038] Figure 1 A flow chart of a method for measuring the oscillation frequency of a fuel nozzle provided in an embodiment of the present disclosure.

[0039] Figure 2 A schematic diagram of the focus position range of the incident laser spot in the method for measuring the oscillation frequency of a fuel nozzle provided in an embodiment of the present disclosure.

[0040] Figure 3 A schematic diagram of the first injection angle in the method for measuring the oscillation frequency of a fuel nozzle provided in an embodiment of the present disclosure.

[0041] Figure 4 A structural diagram of a fuel nozzle oscillation frequency measurement system provided in an embodiment of the present disclosure.

[0042] Figure 5 A schematic diagram of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present disclosure more apparent, the following will describe in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the exemplary embodiments described herein.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] The term "and / or" herein simply describes an association relationship, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, the simultaneous existence of A and B, and the existence of B alone. In addition, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0046] Research has shown that with the rapid development of aircraft engines, the oscillation frequency of self-excited swept fuel nozzles is becoming increasingly important for improving engine combustion efficiency. By studying and analyzing the operating characteristics of fuel nozzles, we can understand their potential applications in aircraft engines and aerospace propulsion systems, providing strong support for improving fuel atomization performance and optimizing oil-gas mixing uniformity.

[0047] Prior art typically uses high-speed imaging technology to position the liquid jet emitted by a fuel nozzle between a high-intensity illumination source and a high-speed camera. The camera then continuously captures transient shadow images of the fuel nozzle over multiple cycles at a high frame rate. These transient shadow images are then analyzed to determine the nozzle's oscillation frequency. However, due to the high cost of high-speed cameras and the fact that they capture continuous transient shadow images, complex processing and analysis of the large amount of image data are required to determine the nozzle's oscillation frequency. This results in a complex and time-consuming process for determining the oscillation frequency.

[0048] Based on the above research, the present disclosure provides a method for measuring the oscillation frequency of a fuel nozzle, which generates an interference signal between the incident laser and the reflected laser of the laser by determining the target injection angle of the fuel nozzle. Thus, the interference signal can be processed to obtain the oscillation frequency of the fuel nozzle. As described above, there is no need to use a high-speed camera, which reduces the measurement cost. In addition, the amount of data to be processed is small, and only the interference signal needs to be processed. The oscillation frequency determination process of this solution is simple, which improves time efficiency. In addition, the user can also determine the real-time oscillation frequency of the fuel nozzle and observe whether there is a problem with the fuel nozzle based on the real-time oscillation frequency, so that the user can deal with it in a timely manner if there is a problem with the fuel nozzle.

[0049] To facilitate understanding of this embodiment, a detailed description of a method for measuring the oscillation frequency of a fuel nozzle disclosed in this embodiment is first provided. This method is typically executed by an electronic device with sufficient computing power. In some possible implementations, this method can be implemented by a processor invoking computer-readable instructions stored in a memory.

[0050] Reference Figure 1 FIG. 1 is a flow chart of a method for measuring the oscillation frequency of a fuel nozzle according to an embodiment of the present disclosure. The method includes steps S101 to S104, wherein:

[0051] S101. Acquire measurement data of a fuel nozzle from a laser. The measurement data includes: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle, and a distance between the laser and the fuel nozzle.

[0052] In the embodiments of the present disclosure, the laser may be a semiconductor laser. The wavelength of the incident laser light from the semiconductor laser may be determined based on the jetting state and reflectivity of the fuel nozzle. For example, if the peak reflectivity of the semiconductor laser for the liquid jet from the fuel nozzle is between 1000 and 1500 nm, the wavelength of the incident laser light from the semiconductor laser may be set to between 1000 and 1500 nm.

[0053] The distance between the laser and the fuel nozzle can be determined based on the laser power and the feedback efficiency of the test system. For example, if a semiconductor laser is used, the distance between the laser and the fuel nozzle can be set to 200-300 mm due to the low laser power of the semiconductor laser.

[0054] Here, the throat width of the fuel nozzle can be determined by measurement or by referring to the fuel nozzle manual. Here, the default injection angle of the fuel nozzle can be determined as the current injection angle.

[0055] The above implementation ensures that a high signal-to-noise ratio interference signal can be subsequently collected. By prioritizing the use of laser wavelengths with high reflectivity and selecting an appropriate laser operating distance based on the laser power, the significantly varying fuel nozzle flow oscillation signal can be collected for easy observation and analysis.

[0056] S102 . Determine a target injection angle of the fuel nozzle based on the measurement data; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured.

[0057] In an embodiment of the present disclosure, it is possible to determine whether the fuel nozzle meets the optimal measurement condition (i.e., the target measurement condition described below) at the current injection angle based on the measurement data. If the current injection angle meets the optimal measurement condition, the current injection angle is determined as the target injection angle.

[0058] If the current injection angle does not meet the optimal measurement condition, the current measurement angle is adjusted based on the measurement data until the adjusted injection angle meets the optimal measurement condition, and the adjusted injection angle is determined as the target injection angle.

[0059] S103: Control the fuel nozzle to operate at a target injection angle, and during the operation, determine the interference signal between the reflected laser light and the incident laser light of the laser.

[0060] In an embodiment of the present disclosure, while the fuel nozzle is operating at a target injection angle, the laser can be controlled to continuously emit incident laser light toward the liquid jet of the fuel nozzle.

[0061] Here, after the incident laser is emitted into the liquid jet, it can be reflected by the nozzle working oscillation surface generated by the liquid jet to obtain reflected laser.

[0062] Afterwards, the reflected laser light reflected to the laser can form self-mixing interference with the incident laser light inside the laser, thereby obtaining an interference signal.

[0063] The nozzle working oscillation surface is a fan-shaped liquid film with an angle equal to the current injection angle generated by the fuel nozzle under the injection pressure of the liquid jet.

[0064] S104 : Determine the oscillation frequency of the fuel injection nozzle based on the interference signal.

[0065] In an embodiment of the present disclosure, the interference signal may be processed by a signal processing program, and then the oscillation frequency of the fuel nozzle carried is determined based on the processed interference signal.

[0066] Among them, the signal processing program can perform algorithmic filtering, noise reduction and Fourier transform processing on the interference signal.

[0067] In an embodiment of the present disclosure, first, measurement data of a fuel nozzle measured by a laser is obtained; wherein the measurement data includes at least one of the following: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle, and a distance between the laser and the fuel nozzle; second, based on the measurement data, a target injection angle of the fuel nozzle is determined; wherein the target injection angle is the injection angle of the fuel nozzle when an oscillation frequency of the fuel nozzle is measured; second, the fuel nozzle is controlled to operate at the target injection angle, and during the operation, an interference signal between the reflected laser light of the laser and the incident laser light is determined; finally, the oscillation frequency of the fuel nozzle is determined based on the interference signal.

[0068] In the above-described embodiment, the target injection angle of the fuel nozzle is determined so that an interference signal is generated between the incident laser light and the reflected laser light of the laser. Thus, the interference signal can be processed to obtain the oscillation frequency of the fuel nozzle. This eliminates the need for a high-speed camera, reducing measurement costs. Furthermore, the amount of data to be processed is small, requiring only the interference signal to be processed. The oscillation frequency determination process of this solution is simple, improving time efficiency. Furthermore, the user can determine the real-time oscillation frequency of the fuel nozzle and observe whether there are any problems with the fuel nozzle based on the real-time oscillation frequency, allowing the user to promptly address any problems with the fuel nozzle.

[0069] In an optional embodiment, the above steps of determining the target injection angle of the fuel nozzle based on the measurement data specifically include the following steps:

[0070] First, the measurement data is calculated to obtain target calculation data. The target calculation data includes: the focus position range of the incident laser spot, the target angle between the incident laser and the injection angle of the fuel nozzle, and the distance range between the laser and the fuel nozzle;

[0071] Then, based on the target calculation data, the target injection angle of the fuel injection nozzle is determined.

[0072] In an embodiment of the present disclosure, calculations can be performed based on the current injection angle of the fuel nozzle and the throat width of the fuel nozzle in the measurement data to obtain the focal position range of the incident laser spot and the target angle between the incident laser and the injection angle of the fuel nozzle.

[0073] The target angle between the incident laser and the injection angle of the fuel nozzle can be determined by first determining the nozzle working oscillation surface formed by the current injection angle, and then determining the angle between the incident laser and the nozzle working oscillation surface as the target angle.

[0074] Here, the target injection angle of the fuel injection nozzle can be determined by determining whether the target operation data satisfies the optimal measurement condition.

[0075] In an optional embodiment, the above steps of performing operations on the measurement data to obtain target operation data include:

[0076] Based on the throat width, determine the focusing range of the laser spot in the vertical direction;

[0077] Based on the current injection angle, determine the focusing range of the laser spot in the horizontal direction;

[0078] The focusing range of the laser spot in the vertical direction and the focusing range of the laser spot in the horizontal direction are determined as the focusing position range of the incident laser spot.

[0079] In the embodiment of the present disclosure, the user can set the vertical focusing range Y of the laser spot based on the throat width T according to the actual measurement requirements, that is, the laser spot is Figure 2 The focusing range in the y direction is shown.

[0080] For example, the laser spot's focus position range Y is set between 2T and 100T, that is, 2T < Y < 100T. The closer the laser spot's focus position range is in the Y direction, the smaller the laser spot's focus range is due to the limited fan-shaped angle opening range, and the more complex the focus adjustment process is. On the other hand, the larger the laser spot's focus position range is in the Y direction, the more intense the liquid mist is broken and atomized downstream, the greater the noise in the laser reflection signal is, and the more difficult it is to collect the oscillation frequency.

[0081] Here, the current injection angle can be processed to determine the incident angle of the laser spot in the horizontal direction. Then, the incident fan range of the laser spot in the horizontal direction is determined based on the incident angle, and the incident fan range is determined as the focusing range of the laser spot in the horizontal direction.

[0082] Here, the focus position range of the incident laser spot can be understood as a range constrained by the focus position range of the laser spot and the incident fan range.

[0083] In an optional embodiment, the above step of determining the horizontal focusing range of the laser spot based on the current injection angle includes:

[0084] Determine the focusing angle of the preset horizontal light spot;

[0085] Based on the preset horizontal focus angle of the laser spot and the current injection angle, the focus range of the laser spot in the horizontal direction is determined.

[0086] In the embodiment of the present disclosure, the focusing angle of the preset horizontal light spot can be set according to actual needs, which will not be described in detail here.

[0087] Here, the focus angle β of the preset horizontal light spot and the current injection angle α can be processed to obtain the focus position range k of the laser light spot in the horizontal direction, that is, the laser light spot is Figure 2 The focusing range in the x-direction is shown.

[0088] For example, divide the preset horizontal spot focus angle β by β / 2, and divide the current injection angle α by α / 2. That is, the focus position range k is between β / 2 and α / 2. Furthermore, since the injection angles of different fuel nozzle configurations vary but are generally greater than 20°, to prevent the acquisition of secondary sweep signals, α-β > 6° should be satisfied. Therefore, the focus position of the horizontal laser spot must be between β / 2 and α / 2, with β / 2 > 5° and α / 2 - β / 2 > 3°.

[0089] Reference Figure 2 FIG. 1 is a schematic diagram of the focus position range of the incident laser spot in the method for measuring the oscillation frequency of the fuel nozzle provided by an embodiment of the present disclosure, wherein:

[0090] T is the throat width of the fuel nozzle; the focusing position range of the laser spot is 2T to 100T; the focusing position of the laser horizontal spot at the minimum injection angle range between the preset horizontal spot focusing angle β and the current injection angle α.

[0091] In the embodiments of the present disclosure, on the one hand, the laser spot should be located within the nozzle spray angle range; on the other hand, considering the symmetry of the nozzle oscillation spray process, in order to prevent the acquisition of secondary sweep signals, the laser spot should be located away from the central symmetry line of the nozzle spray angle, and its focus position should be within the fan-shaped area on both sides of the central symmetry line determined based on the focus angle β and the current spray angle α. For example, Figure 2 The shadow area is formed based on the current injection angle α and the focus angle β.

[0092] In an optional embodiment, the above step of determining the target injection angle of the fuel nozzle based on the target calculation data includes the following steps:

[0093] First, determining a first injection angle of the fuel nozzle when the incident laser spot focus position is within the incident laser spot focus position range and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle;

[0094] Secondly, when the fuel nozzle is at a first injection angle, determining whether the laser meets a target measurement condition; wherein the target measurement condition is that the angle between the incident laser and the first injection angle is within a preset angle range;

[0095] Finally, when it is determined that the laser meets the target measurement condition, the first injection angle is determined as the target injection angle.

[0096] In an embodiment of the present disclosure, when the spot focus position of the incident laser at the initial injection angle is within the incident laser spot focus position range, and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle, the initial injection angle can be determined as the first injection angle.

[0097] Here, when the initial injection angle does not satisfy the above conditions, the initial injection angle may be adjusted so that the adjusted initial injection angle satisfies the above conditions, and the adjusted initial injection angle is determined as the first injection angle γ.

[0098] Reference Figure 3 FIG. 1 is a schematic diagram of the first injection angle in the method for measuring the oscillation frequency of a fuel nozzle provided by an embodiment of the present disclosure, wherein the first injection angle γ can be understood as the angle between the incident laser and the nozzle working oscillation surface.

[0099] Here, the user can set the preset angle range according to actual needs. For example, the preset angle range is set to [70°, 90°].

[0100] In the above embodiment, when the target measurement conditions (i.e., the above-mentioned optimal measurement conditions) are met, the reflected laser light can be fed back into the laser's resonant cavity to form an interference signal, affecting the output power of the incident laser light, thereby allowing the user to determine the oscillation frequency of the fuel nozzle based on the interference signal.

[0101] In an optional implementation, based on the above embodiment, the following steps are further included:

[0102] First, when it is determined that the laser does not meet the target measurement condition, the first injection angle is adjusted to obtain an adjusted first injection angle;

[0103] Then, in a case where it is determined that the adjusted first injection angle satisfies the target measurement condition, the adjusted first injection angle is determined as the target injection angle.

[0104] In an embodiment of the present disclosure, the first injection angle can be adjusted based on the incident laser spot focusing position range and the distance range between the laser and the fuel nozzle, so that the incident laser spot focusing position of the adjusted first injection angle is within the incident laser spot focusing position range, and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle.

[0105] If the adjusted first injection angle does not meet the target measurement conditions, the first injection angle is further adjusted until the incident laser spot focus position at the adjusted first injection angle is within the incident laser spot focus position range, and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle. Otherwise, the adjusted first injection angle meets the target measurement conditions. The adjusted first injection angle is then determined as the target injection angle.

[0106] In an optional embodiment, the above step of determining the oscillation frequency of the fuel nozzle based on the interference signal specifically includes the following steps:

[0107] First, the interference signal is subjected to noise reduction processing to obtain a noise-reduced signal;

[0108] Secondly, the noise reduction signal is processed by Fourier transform to obtain a Fourier transform signal;

[0109] Secondly, the signal features of the Fourier transformed signal are extracted;

[0110] Finally, based on the signal characteristics, the oscillation frequency of the fuel nozzle is determined.

[0111] In the embodiments of the present disclosure, the interference signal can be subjected to array downsampling, algorithmic filtering for noise reduction, and Fourier transform processing. Signal characteristics of the interference signal, such as time domain plots and spectrum plots, are then acquired. The oscillation frequency of the fuel nozzle is then extracted based on the interference signal characteristics.

[0112] In the above embodiment, the processing method described above can acquire and display the fuel nozzle signal characteristics in real time, thereby determining the current oscillation frequency of the fuel nozzle under a certain pressure state. Furthermore, based on the real-time oscillation frequency, it can be used to detect whether there is a problem with the fuel nozzle, allowing the user to promptly address the problem.

[0113] Those skilled in the art will understand that in the above-mentioned method of the specific implementation method, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0114] Based on the same inventive concept, the embodiment of the present disclosure also provides a fuel nozzle oscillation frequency measurement system corresponding to the fuel nozzle oscillation frequency measurement method. Since the principle of solving the problem by the system in the embodiment of the present disclosure is similar to the above-mentioned fuel nozzle oscillation frequency measurement method in the embodiment of the present disclosure, the implementation of the system can refer to the implementation of the method, and the repeated parts will not be repeated.

[0115] Reference Figure 4As shown, it is a structural diagram of the fuel nozzle oscillation frequency measurement system provided by an embodiment of the present disclosure, including: a laser 2, a photoelectric conversion detection device 3, a signal acquisition system 7 and a signal processing system 8; in addition, it also includes: a driving power supply 1, a fuel nozzle 4, a liquid jet 5 and a liquid collection box 6.

[0116] Among them, the laser is used to emit an incident laser to the liquid jet emitted by the fuel nozzle; the signal acquisition system is used to obtain the measurement data of the laser on the fuel nozzle; wherein the measurement data includes: the current injection angle of the fuel nozzle, the throat width of the fuel nozzle and the distance between the laser and the fuel nozzle; based on the measurement data, the target injection angle of the fuel nozzle is determined; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured; the photoelectric conversion detection device is used to control the fuel nozzle to operate at the target injection angle, and during the operation process, determine the interference signal between the reflected laser of the laser and the incident laser; the signal processing system is used to determine the oscillation frequency of the fuel nozzle based on the interference signal.

[0117] Here, the driving power supply is used to drive the laser to work, the fuel nozzle is used to emit a liquid jet, and the liquid collecting box is used to receive the liquid jet emitted by the fuel nozzle.

[0118] Here, the signal acquisition and processing system consists of a data acquisition card and a LabView-based signal processing program. The LabView host computer program controls the data acquisition card, changing the acquisition mode and controlling the sampling time via buttons to collect the interference signal. The interference signal is then processed through array downsampling, algorithmic filtering for noise reduction, and Fourier transform. The interference signal processing interface displays the interference signal's time domain and spectrum in real time, thereby determining the fuel nozzle's oscillation frequency.

[0119] The above structure has the following effects: First, it has a simple structure and high integration. The laser can be directly driven by a dry battery. It can serve as a light source and also as a detector, eliminating high-cost and complex equipment such as high-speed cameras and external photodetectors, and significantly reducing the complexity and cost of the system.

[0120] In the above embodiment, the target injection angle of the fuel nozzle is determined so that an interference signal is generated between the incident laser and the reflected laser of the laser. Thus, the interference signal can be processed to obtain the oscillation frequency of the fuel nozzle. This eliminates the need for a high-speed camera, reducing measurement costs. Furthermore, the amount of data to be processed is small, requiring only the interference signal to be processed. The oscillation frequency determination process of this solution is simple, improving time efficiency. Furthermore, the user can determine the real-time oscillation frequency of the fuel nozzle and observe whether there are any problems with the fuel nozzle based on the real-time oscillation frequency, allowing the user to promptly address any problems with the fuel nozzle.

[0121] Corresponding to Figure 1 The embodiment of the present disclosure further provides an electronic device 500, such as Figure 5 FIG. 5 is a schematic structural diagram of an electronic device 500 provided in an embodiment of the present disclosure, including:

[0122] Processor 51, memory 52, and bus 53; memory 52 is used to store execution instructions, including internal memory 521 and external memory 522; the internal memory 521 is also called internal memory, which is used to temporarily store operation data in the processor 51 and data exchanged with external memory 522 such as a hard disk. The processor 51 exchanges data with the external memory 522 through the internal memory 521. When the electronic device 500 is running, the processor 51 communicates with the memory 52 via the bus 53, so that the processor 51 executes the following instructions:

[0123] Acquiring laser measurement data of a fuel nozzle; wherein the measurement data includes: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle, and a distance between the laser and the fuel nozzle;

[0124] Determining a target injection angle of the fuel nozzle based on the measurement data; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured;

[0125] controlling the fuel nozzle to operate at the target injection angle, and during operation, determining an interference signal between the reflected laser light and the incident laser light of the laser;

[0126] An oscillation frequency of the fuel nozzle is determined based on the interference signal.

[0127] The basic principles of the present disclosure have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this disclosure are merely illustrative and not restrictive, and should not be construed as necessarily possessed by each embodiment of the present disclosure. Furthermore, the specific details disclosed above are provided for illustrative purposes and to facilitate understanding, rather than as limitations. These details do not limit the present disclosure to necessarily being implemented using these specific details.

[0128] The block diagrams of the devices, devices, equipment, and systems involved in this disclosure are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0129] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0130] It should also be noted that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present disclosure.

[0131] Various changes, substitutions, and modifications may be made to the technology described herein without departing from the teachings defined by the appended claims. Moreover, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of things, means, methods, and actions described above. Currently existing or later developed processes, machines, manufactures, compositions of things, means, methods, or actions that perform substantially the same function or achieve substantially the same results as the corresponding aspects described herein may be utilized. Accordingly, the appended claims include within their scope such processes, machines, manufactures, compositions of things, means, methods, or actions.

[0132] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0133] The above description has been provided for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present disclosure to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A method for measuring the oscillation frequency of a fuel nozzle, characterized in that: include: Acquiring laser measurement data of a fuel nozzle; wherein the measurement data includes: a current injection angle of the fuel nozzle, a throat width of the fuel nozzle, and a distance between the laser and the fuel nozzle; Determining a target injection angle of the fuel nozzle based on the measurement data; wherein the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured; controlling the fuel nozzle to operate at the target injection angle, and during operation, determining an interference signal between the reflected laser light and the incident laser light of the laser; An oscillation frequency of the fuel nozzle is determined based on the interference signal.

2. The method according to claim 1, wherein Determining a target injection angle of the fuel nozzle based on the measurement data includes: Performing calculations on the measurement data to obtain target calculation data; wherein the target calculation data includes: a focus position range of the incident laser spot, a target angle between the incident laser and the injection angle of the fuel nozzle, and a distance range between the laser and the fuel nozzle; Based on the target calculation data, a target injection angle of the fuel injection nozzle is determined.

3. The method according to claim 2, wherein The performing operation on the measurement data to obtain target operation data includes: Determining a vertical focusing range of the laser spot based on the throat width; Based on the current injection angle, determining a horizontal position range of the laser spot focus; The focusing range of the laser spot in the vertical direction and the horizontal position range of the laser spot focus are determined as the focusing position range of the incident laser spot.

4. The method according to claim 3, wherein The determining, based on the current injection angle, a focusing range of the laser spot in the horizontal direction includes: Determine the focusing angle of the preset horizontal light spot; Based on the preset focusing angle of the horizontal light spot and the current spraying angle, a focusing range of the laser light spot in the horizontal direction is determined.

5. The method according to claim 2, wherein Determining the target injection angle of the fuel nozzle based on the target calculation data includes: determining a first injection angle of the fuel nozzle when the incident laser spot focus position is within the incident laser spot focus position range and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle; When the fuel nozzle is at the first injection angle, determining whether the laser meets a target measurement condition; wherein the target measurement condition is that the angle between the incident laser and the first injection angle is within a preset angle range; In a case where it is determined that the laser satisfies the target measurement condition, the first injection angle is determined as a target injection angle.

6. The method according to claim 5, wherein The method further comprises: When it is determined that the laser does not meet the target measurement condition, adjusting the first injection angle to obtain an adjusted first injection angle; In a case where it is determined that the adjusted first injection angle satisfies the target measurement condition, the adjusted first injection angle is determined as the target injection angle.

7. The method according to claim 1, wherein Determining the oscillation frequency of the fuel nozzle based on the interference signal includes: performing noise reduction processing on the interference signal to obtain a noise reduction signal; Performing Fourier transform processing on the noise reduction signal to obtain a Fourier transform signal; extracting signal features of the Fourier transform signal; Based on the signal characteristic, an oscillation frequency of the fuel nozzle is determined.

8. A fuel nozzle oscillation frequency measurement system, characterized in that: include: Laser, photoelectric conversion detection device, signal acquisition system and signal processing system; Wherein, the laser is used to emit incident laser light toward the liquid jet emitted from the fuel nozzle; the signal acquisition system is used to obtain measurement data of the laser on the fuel nozzle; wherein, the measurement data include: the current injection angle of the fuel nozzle, the throat width of the fuel nozzle and the distance between the laser and the fuel nozzle; based on the measurement data, the target injection angle of the fuel nozzle is determined; wherein, the target injection angle is the injection angle of the fuel nozzle when the oscillation frequency of the fuel nozzle is measured; the photoelectric conversion detection device is used to control the fuel nozzle to operate at the target injection angle, and during operation, determine the interference signal between the reflected laser of the laser and the incident laser; the signal processing system is used to determine the oscillation frequency of the fuel nozzle based on the interference signal.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory, wherein: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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