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

Abstract

The invention relates to the technical field of industrial information and data processing, and particularly provides a fuel nozzle oscillation frequency measurement method, system and device, a medium and a product, and the method comprises the steps: obtaining the measurement data of a laser for a fuel nozzle; wherein the measurement data comprises at least one of the following data: 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; 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 work at the target injection angle, and determining an interference signal between reflected laser and incident laser of the laser in the working process; 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 type of self-excited swept nozzle and its working characteristics [J]. Propulsion Technology, 2023, 44(10): 2210072.).

[0003] In the prior art, high-speed imaging technology is usually used to place the liquid jet emitted by the fuel nozzle between a high-intensity lighting source and a high-speed camera, and the high-speed camera continuously captures the transient working shadow image of the fuel nozzle in multiple cycles at a high frame rate. Afterwards, the oscillation frequency of the fuel nozzle can be determined by analyzing the above-mentioned transient working shadow image. Since the instrument cost of the high-speed camera is high and it captures continuous transient working shadow images, a large amount of image data needs to be processed and analyzed complexly to obtain the oscillation frequency of the fuel nozzle. Therefore, the process of determining the oscillation frequency is complicated and time efficiency is low. 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] Acquire measurement data of the laser on the fuel nozzle; wherein the measurement data includes at least one of the following: 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;

[0006] Based on the measurement data, determining a target injection angle of the fuel nozzle; 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 the operation, determining the interference signal between the reflected laser and the incident laser of the laser;

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

[0009] In addition, 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] Calculating 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, the performing operation on the measurement data to obtain target operation data includes:

[0013] Based on the throat width, determining the focusing range of the laser spot in the vertical direction;

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

[0015] The focusing position range of the laser spot and the focusing range of the laser spot in the horizontal direction are determined as the focusing 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 laser spot in the horizontal direction and the current injection angle, a focusing range of the laser spot in the horizontal direction is determined.

[0019] In addition, 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] Determine a first injection angle of the fuel nozzle when the spot focus position of the incident laser 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] In addition, according to another embodiment of 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 to the liquid jet emitted by the fuel nozzle; the signal acquisition system is used to obtain the measurement data of the laser for the fuel nozzle; wherein, the measurement data includes at least one of the following: 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, 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 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. Thereby, 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 processed is small, and only the interference signal needs to be processed. The oscillation frequency determination process of this scheme 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 when 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 by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used 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 do not constitute a limitation of the present disclosure. In the accompanying 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 solution and advantages of the present disclosure more obvious, the exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only 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 here.

[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, further definition and explanation thereof is not required in subsequent drawings.

[0045] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0046] Research has found that with the rapid development of aero-engines, the oscillation frequency of self-excited swept fuel nozzles is becoming increasingly important for improving engine combustion efficiency. 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.

[0047] In the prior art, high-speed imaging technology is usually used to place the liquid jet emitted by the fuel nozzle between a high-intensity lighting source and a high-speed camera, and the high-speed camera continuously captures the transient working shadow image of the fuel nozzle in multiple cycles at a high frame rate. Afterwards, the oscillation frequency of the fuel nozzle can be determined by analyzing the above-mentioned transient working shadow image. Since the instrument cost of the high-speed camera is high and it captures continuous transient working shadow images, a large amount of image data needs to be processed and analyzed complexly to obtain the oscillation frequency of the fuel nozzle. Therefore, the process of determining the oscillation frequency is complicated and time efficiency is low.

[0048] Based on the above research, the present disclosure provides a method for measuring the oscillation frequency of a fuel nozzle, by determining the target injection angle of the fuel nozzle 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. As described above, there is no need to use a high-speed camera, which reduces the measurement cost. In addition, the amount of data processed is small, and only the interference signal needs to be processed. The oscillation frequency determination process of this scheme 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 when there is a problem with the fuel nozzle.

[0049] To facilitate understanding of this embodiment, a method for measuring the oscillation frequency of a fuel nozzle disclosed in an embodiment of the present disclosure is first introduced in detail. The execution subject of the method for measuring the oscillation frequency of a fuel nozzle provided in an embodiment of the present disclosure is generally an electronic device with certain computing capabilities. In some possible implementations, the method for measuring the oscillation frequency of a fuel nozzle can be implemented by a processor calling a computer-readable instruction 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 provided in an embodiment of the present disclosure, the method comprising steps S101 to S104, wherein:

[0051] S101, obtaining laser measurement data of a fuel nozzle; 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.

[0052] In an embodiment of the present disclosure, the laser may be a semiconductor laser. The wavelength of the incident laser of the semiconductor laser may be determined based on the injection state and reflectivity of the fuel nozzle. For example, when the reflectivity peak of the semiconductor laser for the liquid jet of the fuel nozzle is at a wavelength of 1000 to 1500 nm, the wavelength of the incident laser of the semiconductor laser is set to 1000 to 1500 nm.

[0053] Here, the distance between the laser and the fuel nozzle can be determined based on the laser power of the laser and the feedback efficiency of the test system. For example, in the case of using a semiconductor as a semiconductor laser, 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 manual of the fuel nozzle. Here, the default injection angle of the fuel nozzle can be determined as the current injection angle.

[0055] In the above implementation, it is ensured that interference signals with high signal-to-noise ratio can be collected later. By preferentially selecting a laser wavelength with high reflectivity and selecting a suitable laser working distance according to the laser power of the laser, a fuel nozzle flow swing signal with obvious changes 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 (ie, 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] When 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, controlling the fuel nozzle to operate at a target injection angle, and during the operation, determining the interference signal between the reflected laser and the incident laser of the laser.

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

[0061] Here, after the incident laser is emitted to 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. Thereafter, the oscillation frequency of the carried fuel nozzle 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, the measurement data of the laser on the fuel nozzle is obtained; wherein the measurement data includes at least one of the following: 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; secondly, 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; secondly, the fuel nozzle is controlled to operate at the target injection angle, and during the operation, the interference signal between the reflected laser of the laser and the incident laser is determined; finally, the oscillation frequency of the fuel nozzle is determined based on the interference signal.

[0068] 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. 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 when there is a problem with the fuel nozzle.

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

[0070] First, the measurement data is calculated to obtain target calculation data; wherein 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 focusing 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 in the following manner: first, the nozzle working oscillation surface formed by the current injection angle is determined, and then the angle between the incident laser and the nozzle working oscillation surface is determined as the target angle.

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

[0075] In an optional implementation, the above steps perform operations on the measurement data to obtain target operation data, including:

[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 focusing range Y of the laser spot in the vertical direction based on the throat width T according to the actual measurement requirements, that is, the laser spot is within Figure 2 The focusing range in the y direction is shown.

[0080] For example, the focus position range Y of the laser spot is set between 2T and 100T, that is, 2T<Y<100T. The closer the focus position range Y of the laser spot is, the smaller the focus range of the laser spot is, and the more complicated the focus adjustment process is due to the limited opening range of the fan-shaped angle; and the larger the focus position range Y of the laser spot is, the more intense the breakup and atomization of the liquid mist in the downstream is, the greater the noise of 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-shaped range.

[0083] In an optional embodiment, the above step determines the focusing range of the laser spot in the horizontal direction based on the current injection angle, including:

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

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

[0086] In the embodiments 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 focusing angle β of the preset horizontal light spot and the current injection angle α can be processed to obtain the focusing 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, the focus angle β of the preset horizontal light spot is divided to obtain β / 2; the current injection angle α is divided by α / 2. That is, the focus position range k is between β / 2 and α / 2, and since the injection angles of fuel nozzles of different configurations are not uniform, but are generally greater than 20°, in order to prevent the acquisition of secondary sweep signals, α-β>6° should be satisfied. Therefore, the focus position of the laser horizontal light spot needs to be between β / 2 and α / 2, and β / 2>5°, 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 in 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 angle β of the preset horizontal spot and the focusing position of the laser horizontal spot at the minimum injection angle stroke among 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 jet angle range; on the other hand, considering the symmetry of the nozzle oscillation jet 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 jet 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 jet 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 operation data includes the following steps:

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

[0094] Secondly, when the fuel nozzle is at the first injection angle, it is determined whether the laser meets the 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 focusing position of the incident laser at the initial 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, 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 working oscillation surface of the nozzle.

[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 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 manner, based on the above embodiment, the following steps are further included:

[0102] Firstly, 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 the 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 focusing position range of the incident laser spot and the distance range between the laser and the fuel nozzle, so that the focusing position of the incident laser spot of the adjusted first injection angle is within the focusing position range of the incident laser spot, and the distance between the laser and the fuel nozzle is within the distance range between the laser and the fuel nozzle.

[0105] In the case that the adjusted first injection angle does not meet the target measurement condition, the first injection angle is continuously adjusted until the spot focus position of the incident laser 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, and otherwise, the adjusted first injection angle meets the target measurement condition. Thereafter, the adjusted first injection angle is 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 reduction 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 an embodiment of the present disclosure, the interference signal may be subjected to array downsampling, algorithm filtering noise reduction, and Fourier transform processing. Thereafter, the signal characteristics of the interference signal, such as a time domain diagram and a spectrum diagram, are obtained. Thereafter, based on the signal characteristics of the interference signal, the oscillation frequency of the fuel nozzle is extracted.

[0112] In the above embodiment, the signal characteristics of the fuel nozzle can be obtained and displayed in real time through the above processing method, so as to obtain the oscillation frequency of the fuel nozzle under a certain pressure state at the current moment. Furthermore, it is possible to observe whether there is a problem with the fuel nozzle based on the real-time oscillation frequency, so that the user can deal with the problem in time when there is a problem with the fuel nozzle.

[0113] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions 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 4 As shown, it is a structural diagram of the fuel nozzle oscillation frequency measurement system provided in the 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 at least one of the following: 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, 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 data acquisition card and the signal processing program based on Labview together constitute the signal acquisition and processing system. The Labview host computer program can realize the control of the data acquisition card, change the acquisition mode and control the sampling time through the button to collect the interference signal, and perform array downsampling, algorithm filtering and noise reduction and Fourier transform processing on the interference signal, and then display the time domain diagram and spectrum diagram of the interference signal in real time on the interference signal processing interface, so as to obtain the oscillation frequency of the fuel nozzle.

[0119] The above structure has the following effects: First, it has a simple structure and high integration. The laser can be driven directly by dry batteries. 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, 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. 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 when there is a problem with the fuel nozzle.

[0121] Corresponds to Figure 1 The security monitoring method of the edge computing service in the present disclosure also provides an electronic device 500, such as Figure 5 FIG. 5 is a schematic diagram of the structure 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 memory 521 and external memory 522; memory 521 here is also called internal memory, which is used to temporarily store operation data in processor 51 and data exchanged with external memory 522 such as hard disk. Processor 51 exchanges data with external memory 522 through memory 521. When the electronic device 500 is running, the processor 51 communicates with the memory 52 through bus 53, so that the processor 51 executes the following instructions:

[0123] Acquire measurement data of the laser on the fuel nozzle; wherein the measurement data includes at least one of the following: 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;

[0124] Based on the measurement data, determining a target injection angle of the fuel nozzle; 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 the operation, determining the interference signal between the reflected laser and the incident laser 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 are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present disclosure are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present disclosure. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, and are not limitations. The above details do not limit the present disclosure to the necessity of adopting the above specific details to be implemented.

[0128] The block diagrams of the devices, apparatuses, equipment, and systems involved in this disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including," "comprising," "having," and the like are open words, referring to "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 of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[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 the widest scope consistent with the principles and novel features disclosed herein.

[0133] The above description has been given 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 multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for measuring the oscillation frequency of a fuel nozzle, characterized in that: include: Acquire measurement data of the laser on the fuel nozzle; wherein the measurement data includes at least one of the following: 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, determining a target injection angle of the fuel nozzle; 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 the operation, determining the interference signal between the reflected laser and the incident laser of the laser; An oscillation frequency of the fuel nozzle is determined based on the interference signal.

2. The method according to claim 1, characterized in that Determining a target injection angle of the fuel nozzle based on the measurement data includes: Calculating 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, characterized in that The performing operation on the measurement data to obtain target operation data includes: Based on the throat width, determining the focusing range of the laser spot in the vertical direction; Based on the current injection angle, determining the 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, characterized in that The step of determining the focusing range of the laser spot in the horizontal direction based on the current injection angle includes: Determine the focusing angle of the preset horizontal light spot; Based on the preset focusing angle of the laser spot in the horizontal direction and the current injection angle, a focusing range of the laser spot in the horizontal direction is determined.

5. The method according to claim 2, characterized in that The step of determining the target injection angle of the fuel nozzle based on the target calculation data includes: Determine a first injection angle of the fuel nozzle when the spot focus position of the incident laser 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, characterized in that 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, characterized in that The determining the oscillation frequency of the fuel nozzle based on the interference signal comprises: 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 to the liquid jet emitted by the fuel nozzle; the signal acquisition system is used to obtain the measurement data of the laser for the fuel nozzle; wherein, the measurement data includes at least one of the following: 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, 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, characterized in that: The processor executes the computer program to implement the steps of the method 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 claims 1 to 7 are implemented.

Images