Raindrop spectrum reconstruction method, device, electronic device and storage medium

Abstract

The present invention provides a raindrop spectrum reconstruction method, device, electronic device and storage medium, which relate to the field of meteorological science and technology. The method includes: obtaining a raindrop spectrum to be reconstructed, a target mass-weighted average diameter and a target reflectivity factor; based on the target mass-weighted average diameter, reconstructing the spectral width of the raindrop spectrum to be reconstructed to obtain a first raindrop spectrum; based on the target mass-weighted average diameter, reconstructing the raindrop diameter of the first raindrop spectrum to obtain a second raindrop spectrum; based on the target reflectivity factor, reconstructing the number density of the second raindrop spectrum to obtain a target raindrop spectrum. In the above manner, the spectral width, raindrop diameter and number density of the raindrop spectrum to be reconstructed are gradually reconstructed using the target mass-weighted average diameter and the target reflectivity factor, so as to obtain the target raindrop spectrum, thereby achieving accurate correction of the raindrop spectrum, so that the reconstructed target raindrop spectrum is closer to the real raindrop spectrum.

Description

Technical Field

[0001] The present invention relates to the field of meteorological science and technology, and in particular to a raindrop spectrum reconstruction method, device, electronic equipment and storage medium. Background Art

[0002] Raindrop size distribution refers to the distribution of the number of raindrops per unit volume with the size of the raindrops, that is, the distribution of the number density of raindrops of various diameters in the raindrop group with the raindrop diameter, also known as raindrop size distribution. The general form of the raindrop spectrum is that the number density decreases rapidly with the increase of the raindrop diameter. The maximum raindrop diameter of the raindrop spectrum is called the spectrum width, which is generally 2 to 3 mm and rarely exceeds 6 mm. The raindrop spectrum is the comprehensive result of the processes of raindrop generation, falling, growth, breakup, and evaporation. They vary with the type of cloud, precipitation mechanism, etc., and may also have obvious changes in a rainfall. For example, the raindrop spectrum of showery precipitation is generally wider, and the number density decreases slowly with the raindrop diameter, while the raindrop spectrum of continuous precipitation is narrower, and the number density decreases steeply with the diameter. The raindrop spectrum is a key factor in revealing the microscopic physical process of the weather system, and directly affects rainfall estimation, thunderstorm monitoring, and simulation of precipitation processes.

[0003] At present, there are methods to invert the raindrop spectrum using the parameters of polarization radar, such as horizontal polarization reflectivity factor (ZH), differential reflectivity (ZDR), differential phase shift rate (KDP), etc. For example, methods such as inverting the raindrop spectrum using the constrained Gamma model and inverting the raindrop spectrum using the double-order moment normalization model all require the use of relevant radar parameters.

[0004] However, there are usually errors in the inversion of raindrop spectrum, which leads to a large difference between the inverted raindrop spectrum and the real raindrop spectrum. Therefore, the inverted raindrop spectrum needs to be reconstructed. Reconstructing the raindrop spectrum means adjusting the existing raindrop spectrum according to relevant parameters on the basis of an existing raindrop spectrum to obtain a new raindrop spectrum that matches these relevant parameters, so as to calibrate and correct the raindrop spectrum and make it closer to the real raindrop spectrum.

[0005] However, there is currently a lack of accurate raindrop spectrum reconstruction methods. Summary of the invention

[0006] The present invention provides a raindrop spectrum reconstruction method, device, electronic device and storage medium, which are used to solve the defect that there is still a lack of accurate raindrop spectrum reconstruction method in the prior art.

[0007] The present invention provides a raindrop spectrum reconstruction method, comprising: obtaining a raindrop spectrum to be reconstructed, a target mass-weighted average diameter and a target reflectivity factor; reconstructing the spectrum width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter to obtain a first raindrop spectrum; reconstructing the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum; and reconstructing the number density of the second raindrop spectrum based on the target reflectivity factor to obtain a target raindrop spectrum.

[0008] According to a raindrop spectrum reconstruction method provided by the present invention, based on the target mass-weighted average diameter, the spectral width of the raindrop spectrum to be reconstructed is reconstructed to obtain a first raindrop spectrum, including: determining the original mass-weighted average diameter of the raindrop spectrum to be reconstructed; determining the target diameter; the target diameter is the diameter corresponding to the maximum value of the number density of the raindrop spectrum to be reconstructed; based on the target diameter, the original mass-weighted average diameter and the target mass-weighted average diameter, the spectral width of the raindrop spectrum to be reconstructed is reconstructed to obtain the first raindrop spectrum.

[0009] According to a raindrop spectrum reconstruction method provided by the present invention, based on a target mass-weighted average diameter, the raindrop diameter of a first raindrop spectrum is reconstructed to obtain a second raindrop spectrum, including: determining a first mass-weighted average diameter of the first raindrop spectrum; determining a diameter offset based on the target mass-weighted average diameter and the first mass-weighted average diameter; determining a raindrop translation distance based on the diameter offset; and reconstructing the raindrop diameter of the first raindrop spectrum based on the raindrop translation distance to obtain a second raindrop spectrum.

[0010] According to a raindrop spectrum reconstruction method provided by the present invention, the calculation formula of the raindrop translation distance is:

[0011] ;

[0012] in, is the translation distance of raindrops; is the target mass-weighted mean diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

[0013] According to a raindrop spectrum reconstruction method provided by the present invention, before determining the raindrop translation distance based on the diameter offset, the method further includes: obtaining multiple raindrop spectrum samples; based on a raindrop spectrum model, performing statistical fitting on the multiple raindrop spectrum samples to determine a first coefficient, a second coefficient, a third coefficient and a fourth coefficient; wherein the raindrop spectrum model is a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model.

[0014] According to a raindrop spectrum reconstruction method provided by the present invention, based on the target reflectivity factor, the number density of the second raindrop spectrum is reconstructed to obtain the target raindrop spectrum, including: determining the first reflectivity factor of the second raindrop spectrum; determining the number density correction coefficient based on the target reflectivity factor and the first reflectivity factor; based on the number density correction coefficient, reconstructing the number density of the second raindrop spectrum to obtain the target raindrop spectrum.

[0015] According to a raindrop spectrum reconstruction method provided by the present invention, the number density correction coefficient is the ratio of the target reflectivity factor to the first reflectivity factor.

[0016] The present invention also provides a raindrop spectrum reconstruction device, comprising: an acquisition module, used to obtain a raindrop spectrum to be reconstructed, a target mass-weighted average diameter and a target reflectivity factor; a spectral width reconstruction module, used to reconstruct the spectral width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter, to obtain a first raindrop spectrum; a raindrop diameter reconstruction module, used to reconstruct the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter, to obtain a second raindrop spectrum; and a number density reconstruction module, used to reconstruct the number density of the second raindrop spectrum based on the target reflectivity factor, to obtain a target raindrop spectrum.

[0017] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any of the above-mentioned raindrop spectrum reconstruction methods is implemented.

[0018] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned raindrop spectrum reconstruction methods is implemented.

[0019] The raindrop spectrum reconstruction method, device, electronic device and storage medium provided by the present invention utilize the target mass-weighted average diameter and the target reflectivity factor to gradually reconstruct the spectral width, raindrop diameter and number density of the raindrop spectrum to be reconstructed, thereby obtaining the target raindrop spectrum, realizing accurate correction of the raindrop spectrum, and making the reconstructed target raindrop spectrum closer to the real raindrop spectrum. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is one of the flow charts of the raindrop spectrum reconstruction method provided by the present invention.

[0022] Figure 2 This is the second flow chart of the raindrop spectrum reconstruction method provided by the present invention.

[0023] Figure 3 It is a schematic diagram comparing the first raindrop spectrum to be reconstructed and the standard raindrop spectrum provided by the present invention.

[0024] Figure 4 It is a schematic diagram comparing the second raindrop spectrum to be reconstructed provided by the present invention and the standard raindrop spectrum.

[0025] Figure 5 It is a schematic diagram comparing the third raindrop spectrum to be reconstructed provided by the present invention and the standard raindrop spectrum.

[0026] Figure 6 It is a schematic diagram comparing the fourth raindrop spectrum to be reconstructed provided by the present invention and the standard raindrop spectrum.

[0027] Figure 7 It is a structural schematic diagram of the raindrop spectrum reconstruction device provided by the present invention.

[0028] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1 , Figure 1 FIG. 1 is one of the flow charts of the raindrop spectrum reconstruction method provided by the present invention. Figure 1 As shown, in this embodiment, the raindrop spectrum reconstruction method includes steps S110 to S140, and each step is specifically as follows:

[0031] S110: Obtain the raindrop spectrum to be reconstructed, the target mass-weighted average diameter, and the target reflectivity factor.

[0032] Specifically, the raindrop spectrum to be reconstructed is the raindrop spectrum obtained by inversion. Assume that the raindrop spectrum to be reconstructed is recorded as , after determining the raindrop spectrum to be reconstructed After that, we need to obtain the reference parameter, namely the target mass-weighted mean diameter and target reflectivity factor .

[0033] It should be noted that the target mass-weighted mean diameter and target reflectivity factor It can be solved according to the relevant parameter formula.

[0034] Specifically, assuming there is a real raindrop spectrum , then the real raindrop spectrum The formula for the nth moment of the raindrop spectrum is as follows:

[0035] ;

[0036] in, represents the nth order moment of the raindrop spectrum, Represents the raindrop diameter.

[0037] Target mass weighted mean diameter and target reflectivity factor According to the real raindrop spectrum The target mass-weighted average diameter is calculated by the raindrop spectrum n-order moment formula. and target reflectivity factor The calculation formulas are as follows:

[0038] ;

[0039] ;

[0040] From the above formula, we can see that the target mass-weighted average diameter According to the third-order moment of the raindrop spectrum and the fourth-order moment of the raindrop spectrum Calculated, target reflectivity factor According to the sixth-order moment of the raindrop spectrum Calculated.

[0041] S120: Reconstruct the spectrum width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter to obtain a first raindrop spectrum.

[0042] See also Figure 2 , Figure 2 This is the second flow chart of the raindrop spectrum reconstruction method provided by the present invention.

[0043] like Figure 2 As shown, given the known raindrop spectrum to be reconstructed and the reference parameter (i.e., the target mass-weighted mean diameter and target reflectivity factor ) and then calculate the raindrop spectrum to be reconstructed The original mass-weighted mean diameter .

[0044] Among them, when the raindrop spectrum is known, the mass-weighted average diameter can be calculated according to a known formula, and the calculation method thereof is a prior art and will not be described in detail here.

[0045] Furthermore, the target diameter is determined , target diameter To reconstruct the raindrop spectrum The diameter corresponding to the maximum number density.

[0046] Specifically, since the raindrop spectrum is the distribution of the number density of raindrops of various diameters in the raindrop group along with the raindrop diameter, the maximum number density can be directly read from the raindrop spectrum, and the raindrop diameter corresponding to the maximum number density is taken as the target diameter. .

[0047] Furthermore, based on the target diameter , original mass weighted mean diameter and the target mass-weighted mean diameter , to reconstruct the raindrop spectrum The spectral width is reconstructed to obtain the first raindrop spectrum .

[0048] Specifically, the raindrop spectrum to be reconstructed is first The diameter corresponding to the maximum number density is the target diameter , move to the raindrop spectrum to be reconstructed The horizontal axis is 0; then according to the original mass weighted average diameter and the target mass-weighted mean diameter Calculate the spectral width expansion factor, which is the target mass-weighted average diameter The original mass-weighted mean diameter The ratio of , that is, the spectrum width expansion coefficient is , and treat the reconstructed raindrop spectrum The spectral width is reconstructed, and the raindrop spectrum to be reconstructed Spectral width expansion times to obtain the middle raindrop spectrum, which is the raindrop spectrum after the spectrum width expansion, and determine the diameter corresponding to the maximum value of the number density of the middle raindrop spectrum ; Finally, the raindrop spectrum to be reconstructed The diameter corresponding to the maximum number density (i.e. the target diameter ), from the horizontal coordinate 0 to the middle raindrop spectrum The first raindrop spectrum is obtained , to achieve the reconstruction of raindrop spectrum Adjustment and reconstruction of the spectral width.

[0049] like Figure 2 As shown, the above spectrum width reconstruction process can be simplified as the following formula:

[0050] ;

[0051] in, represents the first raindrop spectrum; Explain the expansion of spectral width and target mass-weighted mean diameter , original mass weighted mean diameter Related.

[0052] S130: reconstructing the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum.

[0053] After obtaining the first raindrop spectrum After that, multiple raindrop spectrum samples can be obtained, and a suitable raindrop spectrum model can be selected, such as a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model, and statistical fitting can be performed on multiple raindrop spectrum samples to count the translation distances of raindrops in all raindrop spectrum samples. The change in the mass-weighted average diameter of the raindrop spectrum samples before and after translation The quantitative relationship is:

[0054] ;

[0055] in, is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient; is the raindrop translation distance of the raindrop spectrum sample; is the mass-weighted average diameter of the raindrop spectrum samples after the raindrop diameter of the raindrop spectrum samples is translated; is the mass-weighted average diameter of the raindrop spectrum samples before the raindrop diameter of the raindrop spectrum samples is translated; It is the change value of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation, that is, the offset of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation.

[0056] It can be understood that the larger the sample size of the raindrop spectrum samples, the larger the first coefficient , the second coefficient , the third coefficient and the fourth coefficient The more accurate it is, the closer the quantitative relationship reflected in the above formula is to the quantitative relationship of the actual raindrop spectrum.

[0057] Furthermore, if Figure 2 As shown, calculate the first raindrop spectrum The first mass-weighted mean diameter .

[0058] Further, based on the target mass weighted average diameter and the first mass-weighted mean diameter , calculate the diameter offset , the diameter offset is the target mass-weighted average diameter and the first mass-weighted mean diameter The difference.

[0059] Furthermore, the diameter offset Substituting the above quantitative relationship, the translation distance of the raindrop is calculated , that is, the raindrop translation distance The calculation formula is:

[0060] ;

[0061] in, is the translation distance of raindrops; is the target mass-weighted mean diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

[0062] Furthermore, based on the raindrop translation distance , for the first raindrop spectrum The raindrop diameter is reconstructed to obtain the second raindrop spectrum .

[0063] like Figure 2 As shown, the above raindrop diameter reconstruction process can be simplified as the following formula:

[0064] ;

[0065] in, represents the second raindrop spectrum; Explain the reconstruction of raindrop diameter and raindrop translation distance Related.

[0066] S140: reconstructing the number density of the second raindrop spectrum based on the target reflectivity factor to obtain the target raindrop spectrum.

[0067] Specifically, Figure 2 As shown, when obtaining the second raindrop spectrum Afterwards, the first reflectivity factor of the second raindrop spectrum is calculated , and based on the target reflectivity factor and the first reflectivity factor , calculate the number density correction factor.

[0068] Among them, the number density correction factor is the target reflectivity factor and the first reflectivity factor The ratio of the number density correction factor is .

[0069] Furthermore, based on the number density correction factor , for the second raindrop spectrum The number density is reconstructed to obtain the target raindrop spectrum , complete the raindrop spectrum reconstruction.

[0070] like Figure 2 As shown, the above number density reconstruction process can be simplified as the following formula:

[0071] ;

[0072] in, represents the target raindrop spectrum; is the number density correction factor.

[0073] The raindrop spectrum reconstruction method provided in this embodiment uses the target mass-weighted average diameter and the target reflectivity factor to gradually reconstruct the spectral width, raindrop diameter and number density of the raindrop spectrum to be reconstructed, thereby obtaining the target raindrop spectrum, achieving accurate correction of the raindrop spectrum, and making the reconstructed target raindrop spectrum closer to the real raindrop spectrum.

[0074] In some embodiments, based on the target mass-weighted average diameter, the spectral width of the raindrop spectrum to be reconstructed is reconstructed to obtain a first raindrop spectrum, including: determining the original mass-weighted average diameter of the raindrop spectrum to be reconstructed; determining the target diameter; the target diameter is the diameter corresponding to the maximum value of the number density of the raindrop spectrum to be reconstructed; based on the target diameter, the original mass-weighted average diameter and the target mass-weighted average diameter, the spectral width of the raindrop spectrum to be reconstructed is reconstructed to obtain the first raindrop spectrum.

[0075] like Figure 2 As shown, given the known raindrop spectrum to be reconstructed and the reference parameter (i.e., the target mass-weighted mean diameter and target reflectivity factor ) and then calculate the raindrop spectrum to be reconstructed The original mass-weighted mean diameter .

[0076] Among them, when the raindrop spectrum is known, the mass-weighted average diameter can be calculated according to a known formula, and the calculation method thereof is a prior art and will not be described in detail here.

[0077] Furthermore, the target diameter is determined , target diameter To reconstruct the raindrop spectrum The diameter corresponding to the maximum number density.

[0078] Specifically, since the raindrop spectrum is the distribution of the number density of raindrops of various diameters in the raindrop group along with the raindrop diameter, the maximum number density can be directly read from the raindrop spectrum, and the raindrop diameter corresponding to the maximum number density is taken as the target diameter. .

[0079] Furthermore, based on the target diameter , original mass weighted mean diameter and the target mass-weighted mean diameter , to reconstruct the raindrop spectrum The spectral width is reconstructed to obtain the first raindrop spectrum .

[0080] Specifically, the raindrop spectrum to be reconstructed is first The diameter corresponding to the maximum number density is the target diameter , move to the raindrop spectrum to be reconstructed The horizontal axis is 0; then according to the original mass weighted average diameter and the target mass-weighted mean diameter Calculate the spectral width expansion factor, which is the target mass-weighted average diameter The original mass-weighted mean diameter The ratio of , that is, the spectrum width expansion coefficient is , and treat the reconstructed raindrop spectrum The spectral width is reconstructed, and the raindrop spectrum to be reconstructed Spectral width expansion times to obtain the middle raindrop spectrum, which is the raindrop spectrum after the spectrum width expansion, and determine the diameter corresponding to the maximum value of the number density of the middle raindrop spectrum ; Finally, the raindrop spectrum to be reconstructed The diameter corresponding to the maximum number density (i.e. the target diameter ), from the horizontal coordinate 0 to the middle raindrop spectrum The first raindrop spectrum is obtained , to achieve the reconstruction of raindrop spectrum Adjustment and reconstruction of the spectral width.

[0081] like Figure 2 As shown, the above spectrum width reconstruction process can be simplified as the following formula:

[0082] ;

[0083] in, represents the first raindrop spectrum; Explain the expansion of spectral width and target mass-weighted mean diameter , original mass weighted mean diameter Related.

[0084] In some embodiments, based on the target mass weighted average diameter, the raindrop diameter of the first raindrop spectrum is reconstructed to obtain the second raindrop spectrum, including: determining the first mass weighted average diameter of the first raindrop spectrum; determining the diameter offset based on the target mass weighted average diameter and the first mass weighted average diameter; determining the raindrop translation distance based on the diameter offset; based on the raindrop translation distance, reconstructing the raindrop diameter of the first raindrop spectrum to obtain the second raindrop spectrum.

[0085] After obtaining the first raindrop spectrum After that, multiple raindrop spectrum samples can be obtained, and a suitable raindrop spectrum model can be selected, such as a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model, and statistical fitting can be performed on multiple raindrop spectrum samples to count the translation distances of raindrops in all raindrop spectrum samples. The change in the mass-weighted average diameter of the raindrop spectrum samples before and after translation The quantitative relationship is:

[0086] ;

[0087] in, is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient; is the raindrop translation distance of the raindrop spectrum sample; is the mass-weighted average diameter of the raindrop spectrum samples after the raindrop diameter of the raindrop spectrum samples is translated; is the mass-weighted average diameter of the raindrop spectrum samples before the raindrop diameter of the raindrop spectrum samples is translated; It is the change value of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation, that is, the offset of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation.

[0088] It can be understood that the larger the sample size of the raindrop spectrum samples, the larger the first coefficient , the second coefficient , the third coefficient and the fourth coefficient The more accurate it is, the closer the quantitative relationship reflected in the above formula is to the quantitative relationship of the actual raindrop spectrum.

[0089] Furthermore, if Figure 2 As shown, calculate the first raindrop spectrum The first mass-weighted mean diameter .

[0090] Further, based on the target mass weighted average diameter and the first mass-weighted mean diameter , calculate the diameter offset , the diameter offset is the target mass-weighted average diameter and the first mass-weighted mean diameter The difference.

[0091] Furthermore, the diameter offset Substituting the above quantitative relationship, the translation distance of the raindrop is calculated , that is, the raindrop translation distance The calculation formula is:

[0092] ;

[0093] in, is the translation distance of raindrops; is the target mass-weighted mean diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

[0094] Furthermore, based on the raindrop translation distance , for the first raindrop spectrum The raindrop diameter is reconstructed to obtain the second raindrop spectrum .

[0095] like Figure 2 As shown, the above raindrop diameter reconstruction process can be simplified as the following formula:

[0096] ;

[0097] in, represents the second raindrop spectrum; Explain the reconstruction of raindrop diameter and raindrop translation distance Related.

[0098] In some embodiments, the calculation formula for the raindrop translation distance is:

[0099] ;

[0100] in, is the translation distance of raindrops; is the target mass-weighted mean diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

[0101] In some embodiments, before determining the raindrop translation distance based on the diameter offset, it also includes: obtaining multiple raindrop spectrum samples; based on a raindrop spectrum model, performing statistical fitting on the multiple raindrop spectrum samples to determine a first coefficient, a second coefficient, a third coefficient and a fourth coefficient; wherein the raindrop spectrum model is a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model.

[0102] Specifically, after obtaining the first raindrop spectrum After that, multiple raindrop spectrum samples can be obtained, and a suitable raindrop spectrum model can be selected, such as a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model, and statistical fitting can be performed on multiple raindrop spectrum samples to count the translation distances of raindrops in all raindrop spectrum samples. The change in the mass-weighted average diameter of the raindrop spectrum samples before and after translation The quantitative relationship is:

[0103] ;

[0104] in, is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient; is the raindrop translation distance of the raindrop spectrum sample; is the mass-weighted average diameter of the raindrop spectrum samples after the raindrop diameter of the raindrop spectrum samples is translated; is the mass-weighted average diameter of the raindrop spectrum samples before the raindrop diameter of the raindrop spectrum samples is translated; It is the change value of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation, that is, the offset of the mass-weighted average diameter of the raindrop spectrum samples before and after the translation.

[0105] It can be understood that the larger the sample size of the raindrop spectrum samples, the larger the first coefficient , the second coefficient , the third coefficient and the fourth coefficient The more accurate it is, the closer the quantitative relationship reflected in the above formula is to the quantitative relationship of the actual raindrop spectrum.

[0106] In some embodiments, based on the target reflectivity factor, the number density of the second raindrop spectrum is reconstructed to obtain the target raindrop spectrum, including: determining a first reflectivity factor of the second raindrop spectrum; determining a number density correction coefficient based on the target reflectivity factor and the first reflectivity factor; based on the number density correction coefficient, reconstructing the number density of the second raindrop spectrum to obtain the target raindrop spectrum.

[0107] Specifically, Figure 2 As shown, when obtaining the second raindrop spectrum Afterwards, the first reflectivity factor of the second raindrop spectrum is calculated , and based on the target reflectivity factor and the first reflectivity factor , calculate the number density correction factor.

[0108] Among them, the number density correction factor is the target reflectivity factor and the first reflectivity factor The ratio of the number density correction factor is .

[0109] Furthermore, based on the number density correction factor , for the second raindrop spectrum The number density is reconstructed to obtain the target raindrop spectrum , complete the raindrop spectrum reconstruction.

[0110] like Figure 2 As shown, the above number density reconstruction process can be simplified as the following formula:

[0111] ;

[0112] in, represents the target raindrop spectrum; is the number density correction factor.

[0113] In some embodiments, the number density correction factor is a ratio of the target reflectivity factor and the first reflectivity factor.

[0114] In order to verify the reconstruction effect of the raindrop spectrum reconstruction method provided by the present invention, this embodiment uses a double-order moment normalized raindrop spectrum model to verify the effect.

[0115] For a real raindrop spectrum , the double-order moment normalized raindrop spectrum model can be expressed by the following formula:

[0116] ;

[0117] ;

[0118] ;

[0119] ;

[0120] ;

[0121] in, Represents the real raindrop spectrum of order moment; Represents the real raindrop spectrum of order moment; represents the first shape factor of the double-order moment normalized raindrop spectrum model; represents the second shape factor of the double-order moment normalized raindrop spectrum model; represents the gamma function; is the intermediate function; , , All are intermediate variables; Represents the real raindrop spectrum The diameter of raindrops.

[0122] The above double-order moment normalized raindrop spectrum model is used to characterize the raindrop spectrum, and the shape factor of the raindrop spectrum is assumed to be , shape factor , =6, the sixth moment of the raindrop spectrum , , the seventh-order moment of the raindrop spectrum ;when When the values ​​are 1, 2, 3, and 4 respectively, four different raindrop spectra to be reconstructed can be obtained, which are respectively recorded as the first raindrop spectrum to be reconstructed, the second raindrop spectrum to be reconstructed, the third raindrop spectrum to be reconstructed, and the fourth raindrop spectrum to be reconstructed.

[0123] Among them, the unit The units of raindrop diameter (mm, millimeter) and raindrop number concentration ( , the number of raindrops contained in a unit volume).

[0124] Set the standard raindrop spectrum as the control group, the shape factor of the standard raindrop spectrum , shape factor , =6, the sixth moment of the standard raindrop spectrum , , the seventh-order moment of the standard raindrop spectrum , and based on the standard reflectivity factor of the standard raindrop spectrometer , standard mass weighted mean diameter , .

[0125] in, is the normalized moment parameter The base 10 logarithm of The calculation formula is as follows:

[0126] ;

[0127] ;

[0128] in, represents the density of liquid water; Indicates the liquid water content.

[0129] Furthermore, according to the raindrop spectrum reconstruction method provided by the present invention, the standard mass weighted average diameter As the target mass-weighted mean diameter, the standard reflectivity factor As the target reflectivity factor, the standard mass-weighted mean diameter and the standard reflectivity factor , respectively adjust and reconstruct the first raindrop spectrum to be reconstructed, the second raindrop spectrum to be reconstructed, the third raindrop spectrum to be reconstructed, and the fourth raindrop spectrum to be reconstructed to obtain four target raindrop spectra, and compare the four target raindrop spectra with the standard raindrop spectrum, and calculate the mass-weighted average diameters of the four target raindrop spectra after reconstruction. and , and and With standard parameters and Make a comparison.

[0130] See also Figures 3 to 6 , Figure 3 is a schematic diagram comparing the first raindrop spectrum to be reconstructed and the standard raindrop spectrum provided by the present invention, Figure 4 is a schematic diagram comparing the second raindrop spectrum to be reconstructed and the standard raindrop spectrum provided by the present invention, Figure 5 is a schematic diagram comparing the third raindrop spectrum to be reconstructed and the standard raindrop spectrum provided by the present invention, Figure 6 It is a schematic diagram comparing the fourth raindrop spectrum to be reconstructed provided by the present invention and the standard raindrop spectrum.

[0131] like Figure 3 As shown, Figure 3 The horizontal axis represents the raindrop diameter D, in mm (millimeter). Figure 3 The vertical axis represents the number density, and the unit is ; The black solid line represents the first raindrop spectrum to be reconstructed, and the curve standard represents the standard raindrop spectrum; Figure 3 of is the raindrop spectrum obtained by reconstructing the spectral width of the first raindrop spectrum to be reconstructed, Figure 3 of is the raindrop spectrum obtained by reconstructing the spectral width and raindrop diameter of the first raindrop spectrum to be reconstructed, Figure 3 of is the target raindrop spectrum obtained by reconstructing the spectrum width, raindrop diameter and number density of the first raindrop spectrum to be reconstructed. Figure 3 It can be seen that there is a large difference between the unreconstructed first raindrop spectrum and the standard raindrop spectrum, and after adjustment and reconstruction, Figure 3 Target Raindrop Spectrum It is very close to the standard raindrop spectrum, which can also be seen from the calculated parameters. and With standard parameters and Very close.

[0132] Similarly, if Figure 4 As shown, Figure 4 The horizontal axis represents the raindrop diameter D, in mm (millimeter). Figure 3 The vertical axis represents the number density, and the unit is ; The black solid line represents the second raindrop spectrum to be reconstructed, and the curve standard represents the standard raindrop spectrum; Figure 4 of is the raindrop spectrum obtained by reconstructing the spectral width of the second raindrop spectrum to be reconstructed, Figure 4 of is the raindrop spectrum obtained by reconstructing the spectrum width and raindrop diameter of the second raindrop spectrum to be reconstructed, Figure 4 of is the target raindrop spectrum obtained by reconstructing the spectrum width, raindrop diameter and number density of the second raindrop spectrum to be reconstructed. Figure 4 It can be seen that there is a large difference between the unreconstructed second raindrop spectrum and the standard raindrop spectrum, and after adjustment and reconstruction, Figure 4 Target Raindrop Spectrum It is very close to the standard raindrop spectrum, which can also be seen from the calculated parameters. and With standard parameters and Very close.

[0133] Similarly, if Figure 5 As shown, Figure 5 The horizontal axis represents the raindrop diameter D, in mm (millimeter). Figure 5 The vertical axis represents the number density, and the unit is ; The black solid line represents the third raindrop spectrum to be reconstructed, and the curve standard represents the standard raindrop spectrum; Figure 5 of is the raindrop spectrum obtained by reconstructing the spectral width of the third raindrop spectrum to be reconstructed, Figure 5 of is the raindrop spectrum obtained by reconstructing the spectral width and raindrop diameter of the third raindrop spectrum to be reconstructed, Figure 5 of is the target raindrop spectrum obtained by reconstructing the spectrum width, raindrop diameter and number density of the third raindrop spectrum to be reconstructed. Figure 5 It can be seen that the unreconstructed third raindrop spectrum is quite different from the standard raindrop spectrum, but after adjustment and reconstruction, Figure 5 Target Raindrop Spectrum It is very close to the standard raindrop spectrum, which can also be seen from the calculated parameters. and With standard parameters and Very close.

[0134] Similarly, if Figure 6 As shown, Figure 6 The horizontal axis represents the raindrop diameter D, in mm (millimeter). Figure 6 The vertical axis represents the number density, and the unit is ; The black solid line represents the fourth raindrop spectrum to be reconstructed, and the curve standard represents the standard raindrop spectrum; Figure 6 of is the raindrop spectrum obtained by reconstructing the spectral width of the fourth raindrop spectrum to be reconstructed, Figure 6 of is the raindrop spectrum obtained by reconstructing the spectrum width and raindrop diameter of the fourth raindrop spectrum to be reconstructed, Figure 6 of is the target raindrop spectrum obtained by reconstructing the spectrum width, raindrop diameter and number density of the fourth raindrop spectrum to be reconstructed. Figure 6 It can be seen that the unreconstructed fourth raindrop spectrum is quite different from the standard raindrop spectrum, but after adjustment and reconstruction, Figure 6 Target Raindrop Spectrum It is very close to the standard raindrop spectrum, which can also be seen from the calculated parameters. and With standard parameters and Very close.

[0135] In summary, Figures 3 to 6 It can be seen that the reconstruction effect of the raindrop spectrum reconstruction method provided by the present invention is very good.

[0136] The present invention also provides a raindrop spectrum reconstruction device. Figure 7 , Figure 7 7 is a schematic diagram of the structure of the raindrop spectrum reconstruction device provided by the present invention. In this embodiment, the raindrop spectrum reconstruction device includes an acquisition module 710 , a spectrum width reconstruction module 720 , a raindrop diameter reconstruction module 730 and a number density reconstruction module 740 .

[0137] The acquisition module 710 is used to acquire the raindrop spectrum to be reconstructed, the target mass weighted average diameter and the target reflectivity factor.

[0138] The spectrum width reconstruction module 720 is used to reconstruct the spectrum width of the raindrop spectrum to be reconstructed based on the target mass weighted average diameter to obtain a first raindrop spectrum.

[0139] The raindrop diameter reconstruction module 730 is used to reconstruct the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum.

[0140] The number density reconstruction module 740 is used to reconstruct the number density of the second raindrop spectrum based on the target reflectivity factor to obtain a target raindrop spectrum.

[0141] In some embodiments, the spectral width reconstruction module 720 is specifically used to determine the original mass-weighted average diameter of the raindrop spectrum to be reconstructed; determine the target diameter; the target diameter is the diameter corresponding to the maximum value of the number density of the raindrop spectrum to be reconstructed; based on the target diameter, the original mass-weighted average diameter and the target mass-weighted average diameter, reconstruct the spectral width of the raindrop spectrum to be reconstructed to obtain a first raindrop spectrum.

[0142] In some embodiments, the raindrop diameter reconstruction module 730 is specifically used to determine a first mass-weighted average diameter of a first raindrop spectrum; determine a diameter offset based on the target mass-weighted average diameter and the first mass-weighted average diameter; determine a raindrop translation distance based on the diameter offset; and reconstruct the raindrop diameter of the first raindrop spectrum based on the raindrop translation distance to obtain a second raindrop spectrum.

[0143] In some embodiments, the calculation formula for the raindrop translation distance is:

[0144] ;

[0145] in, is the translation distance of raindrops; is the target mass-weighted mean diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

[0146] In some embodiments, the raindrop diameter reconstruction module 730 is specifically used to obtain multiple raindrop spectrum samples; based on the raindrop spectrum model, the multiple raindrop spectrum samples are statistically fitted to determine the first coefficient, the second coefficient, the third coefficient and the fourth coefficient; wherein the raindrop spectrum model is a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model.

[0147] In some embodiments, the number density reconstruction module 740 is specifically used to determine a first reflectivity factor of the second raindrop spectrum; determine a number density correction coefficient based on the target reflectivity factor and the first reflectivity factor; and reconstruct the number density of the second raindrop spectrum based on the number density correction coefficient to obtain the target raindrop spectrum.

[0148] In some embodiments, the number density correction factor is a ratio of the target reflectivity factor and the first reflectivity factor.

[0149] The invention also provides an electronic device. Figure 8 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 8 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the raindrop spectrum reconstruction method.

[0150] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0151] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the raindrop spectrum reconstruction method provided by the above methods is implemented.

[0152] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0153] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A raindrop spectrum reconstruction method, characterized in that: include: Obtain the raindrop spectrum to be reconstructed, the target mass-weighted average diameter and the target reflectivity factor; reconstructing the spectrum width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter to obtain a first raindrop spectrum; reconstructing the raindrop diameters of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum; reconstructing the number density of the second raindrop spectrum based on the target reflectivity factor to obtain a target raindrop spectrum; The step of reconstructing the spectral width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter to obtain a first raindrop spectrum includes: Determining the original mass-weighted average diameter of the raindrop spectrum to be reconstructed; Determine a target diameter; the target diameter is a diameter corresponding to the maximum value of the number density of the raindrop spectrum to be reconstructed; reconstructing the spectrum width of the raindrop spectrum to be reconstructed based on the target diameter, the original mass-weighted average diameter and the target mass-weighted average diameter to obtain the first raindrop spectrum; The step of reconstructing the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum includes: determining a first mass-weighted average diameter of the first raindrop spectrum; determining a diameter offset based on the target mass-weighted average diameter and the first mass-weighted average diameter; Based on the diameter offset, determining a raindrop translation distance; reconstructing the raindrop diameter of the first raindrop spectrum based on the raindrop translation distance to obtain the second raindrop spectrum; The step of reconstructing the number density of the second raindrop spectrum based on the target reflectivity factor to obtain a target raindrop spectrum includes: determining a first reflectivity factor of the second raindrop spectrum; determining a number density correction factor based on the target reflectivity factor and the first reflectivity factor; Based on the number density correction coefficient, the number density of the second raindrop spectrum is reconstructed to obtain the target raindrop spectrum.

2. The raindrop spectrum reconstruction method according to claim 1, characterized in that: The calculation formula of the raindrop translation distance is: ； in, is the translation distance of the raindrop; is the target mass-weighted average diameter; is the first mass-weighted average diameter; is the diameter offset; is the first coefficient; is the second coefficient; is the third coefficient; is the fourth coefficient.

3. The raindrop spectrum reconstruction method according to claim 2, characterized in that: Before determining the raindrop translation distance based on the diameter offset, the method further includes: Get multiple raindrop spectrum samples; Based on a raindrop spectrum model, performing statistical fitting on a plurality of raindrop spectrum samples to determine the first coefficient, the second coefficient, the third coefficient, and the fourth coefficient; Wherein, the raindrop spectrum model is a double-order moment normalized raindrop spectrum model or a Gamma raindrop spectrum model.

4. The raindrop spectrum reconstruction method according to claim 1, characterized in that: The number density correction coefficient is a ratio of the target reflectivity factor to the first reflectivity factor.

5. A raindrop spectrum reconstruction device, characterized in that: include: An acquisition module, used to obtain the raindrop spectrum to be reconstructed, the target mass-weighted average diameter and the target reflectivity factor; A spectrum width reconstruction module, used for reconstructing the spectrum width of the raindrop spectrum to be reconstructed based on the target mass weighted average diameter to obtain a first raindrop spectrum; A raindrop diameter reconstruction module, used to reconstruct the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain a second raindrop spectrum; A number density reconstruction module, used to reconstruct the number density of the second raindrop spectrum based on the target reflectivity factor to obtain a target raindrop spectrum; The reconstructing the spectral width of the raindrop spectrum to be reconstructed based on the target mass-weighted average diameter to obtain a first raindrop spectrum includes: determining the original mass-weighted average diameter of the raindrop spectrum to be reconstructed; determining a target diameter; the target diameter is a diameter corresponding to the maximum value of the number density of the raindrop spectrum to be reconstructed; based on the target diameter, the original mass-weighted average diameter and the target mass-weighted average diameter, reconstructing the spectral width of the raindrop spectrum to be reconstructed to obtain the first raindrop spectrum; The reconstructing the raindrop diameter of the first raindrop spectrum based on the target mass-weighted average diameter to obtain the second raindrop spectrum includes: determining a first mass-weighted average diameter of the first raindrop spectrum; determining a diameter offset based on the target mass-weighted average diameter and the first mass-weighted average diameter; determining a raindrop translation distance based on the diameter offset; and reconstructing the raindrop diameter of the first raindrop spectrum based on the raindrop translation distance to obtain the second raindrop spectrum; The reconstructing the number density of the second raindrop spectrum based on the target reflectivity factor to obtain the target raindrop spectrum includes: determining a first reflectivity factor of the second raindrop spectrum; determining a number density correction coefficient based on the target reflectivity factor and the first reflectivity factor; and reconstructing the number density of the second raindrop spectrum based on the number density correction coefficient to obtain the target raindrop spectrum.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the raindrop spectrum reconstruction method according to any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the raindrop spectrum reconstruction method according to any one of claims 1 to 4 is implemented.

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