Cigar tobacco airing illumination adjusting method and device, electronic device and storage medium

Abstract

The invention relates to a cigar tobacco air-curing illumination adjustment method and device, an electronic device and a storage medium, and the cigar tobacco air-curing illumination adjustment method comprises the steps: obtaining the absorption spectrum data of the current cigar tobacco; extracting an absorption peak value and an absorption change rate in the absorption spectrum data; determining the target illumination intensity of the current cigar tobacco leaf air-curing according to the absorption change rate, and determining the target illumination wavelength of the current cigar tobacco leaf air-curing according to the absorption peak value and the absorption change rate; and according to the target illumination wavelength and the target illumination intensity, determining the target illumination condition of the current cigar tobacco leaf air-curing, and through the application, accurate adjustment of the illumination condition in the cigar tobacco leaf air-curing process is realized.

Description

Technical Field

[0001] The present application relates to the technical field of tobacco processing, and in particular to a method, device, electronic device and storage medium for adjusting lighting during the drying of cigar tobacco leaves. Background Art

[0002] The drying process of cigar tobacco leaves is a complex and delicate process that needs to be completed under strictly controlled conditions of light, humidity and temperature. Light plays an important role in the drying process. Light not only affects the decomposition of chlorophyll, but is also directly related to the accumulation of sugars and the formation of aroma substances. The decomposition of chlorophyll is a key step in the color change of tobacco leaves, while the accumulation of sugars and aroma substances determines the final flavor and quality of cigar tobacco leaves. Therefore, the optimization of lighting conditions is crucial to improving the quality of cigar tobacco leaves. However, at present, the traditional drying process relies on light sources with fixed wavelengths and intensities. This fixed lighting mode has the following problems:

[0003] 1. Waste of energy and low production efficiency: The wavelength and intensity of the light source used in the traditional air-drying process are fixed and cannot be dynamically adjusted according to the actual needs of tobacco leaves. This fixed mode not only leads to a large amount of energy waste, but also affects production efficiency. Since the lighting conditions cannot be optimized, the air-drying process of tobacco leaves may become inefficient, extending the production cycle.

[0004] 2. Lack of adaptability to the spectral characteristics of different tobacco leaves: Different varieties of tobacco leaves may have different requirements for light during the drying process. Traditional processes cannot be flexibly adjusted according to the spectral characteristics of tobacco leaves, resulting in some tobacco leaves being unable to obtain the best lighting conditions, which in turn affects their quality. This inflexible modulation process prevents the flavor and aroma of tobacco leaves from being fully developed.

[0005] 3. Lack of real-time adjustment mechanism, unstable quality: The traditional air-drying process lacks a real-time adjustment mechanism for light conditions, and cannot be dynamically adjusted according to the changes in tobacco leaves during the air-drying process. This leads to unstable quality of tobacco leaves, and some tobacco leaves may not achieve the ideal air-drying effect due to insufficient or excessive light, which in turn affects the quality of the final product.

[0006] With regard to the problem in the related art that the lighting conditions cannot be accurately adjusted during the drying of cigar tobacco leaves, no effective solution has been proposed so far. Summary of the invention

[0007] In this embodiment, a method, device, electronic device and storage medium for adjusting lighting during cigar tobacco leaf drying are provided to solve the problem in the related art that lighting conditions cannot be accurately adjusted during the cigar tobacco leaf drying process.

[0008] In a first aspect, a method for adjusting lighting during cigar tobacco leaf drying is provided in this embodiment, comprising:

[0009] Obtain the absorption spectrum data of the current cigar tobacco leaf;

[0010] Extracting the absorption peak and the absorption change rate in the absorption spectrum data;

[0011] Determine the target light intensity for the current cigar tobacco leaf drying according to the absorption change rate, and determine the target light wavelength for the current cigar tobacco leaf drying according to the absorption peak and the absorption change rate;

[0012] The target illumination condition for the current cigar tobacco leaf drying is determined according to the target illumination wavelength and the target illumination intensity.

[0013] In some embodiments, extracting the absorption peak and the absorption change rate in the absorption spectrum data comprises:

[0014] The absorption spectrum data is sequentially smoothed, baseline corrected and normalized;

[0015] The absorption peak value and the absorption change rate in the absorption spectrum data after the normalization process are extracted.

[0016] In some of the embodiments, the wavelength detection range of the absorption spectrum data is 200 nanometers to 2500 nanometers.

[0017] In some embodiments, the absorption spectrum data includes spectrum data in the ultraviolet region, the blue light region, the green light region, the red light region and the near infrared region.

[0018] In some embodiments, determining the target light intensity for drying the current cigar tobacco leaves according to the absorption change rate includes:

[0019] According to the curing stage of the cigar tobacco leaves, the type of light required for the curing stage is adjusted accordingly;

[0020] When the increase range of the absorption change rate is greater than a preset threshold, the illumination intensity of the illumination type required for the drying stage is increased by a preset illumination intensity value to determine the target illumination intensity;

[0021] When the decrease range of the absorption change rate is less than the preset threshold value, the illumination intensity of the illumination type required for the drying stage is reduced by the preset illumination intensity value to determine the target illumination intensity.

[0022] In some embodiments, determining the target illumination wavelength for drying the current cigar tobacco leaves according to the absorption peak and the absorption change rate includes:

[0023] Calculate the normalized absorption intensity and absorption change rate at each wavelength;

[0024] Obtaining a comprehensive score for each wavelength according to the normalized absorption intensity and the absorption change rate of each wavelength;

[0025] The wavelength with the largest comprehensive score is determined as the target illumination wavelength for the current cigar tobacco leaf drying.

[0026] In a second aspect, a cigar tobacco leaf drying lighting adjustment device is provided in this embodiment, comprising: an acquisition module, an extraction module, a lighting condition determination module and an adjustment module, wherein:

[0027] The acquisition module is used to acquire the absorption spectrum data of the current cigar tobacco leaf;

[0028] The extraction module is used to extract the absorption peak value and the absorption change rate in the absorption spectrum data;

[0029] The illumination condition determination module is used to determine the target illumination intensity for the current cigar tobacco leaf drying according to the absorption change rate; and to determine the target illumination wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate;

[0030] The adjustment module is used to determine the target illumination condition for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

[0031] In a third aspect, a computer device is provided in this embodiment, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method described in the first aspect are implemented.

[0032] In a fourth aspect, an electronic device is provided in this embodiment, 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, the method for adjusting lighting for drying cigar tobacco leaves as described in the first aspect above is implemented.

[0033] In a fifth aspect, a storage medium is provided in this embodiment, on which a computer program is stored, and when the program is executed by a processor, the method for adjusting the lighting for drying cigar tobacco leaves described in the first aspect is implemented.

[0034] Compared with the related art, the cigar leaf airing lighting adjustment method provided in the present embodiment obtains the absorption spectrum data of the current cigar leaf; extracts the absorption peak and the absorption change rate in the absorption spectrum data; determines the target light intensity for the current cigar leaf airing according to the absorption change rate, and determines the target light wavelength for the current cigar leaf airing according to the absorption peak and the absorption change rate; determines the target light condition for the current cigar leaf airing according to the target light wavelength and the target light intensity, thereby realizing accurate adjustment of the light condition during the cigar leaf airing process.

[0035] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 This is a hardware structure block diagram of a terminal of the cigar tobacco leaf airing lighting adjustment method of this embodiment.

[0038] Figure 2 4 is a flow chart of the method for adjusting lighting during cigar tobacco leaf drying according to the present embodiment.

[0039] Figure 3 This is a flow chart of another method for adjusting lighting during cigar tobacco leaf drying according to this embodiment.

[0040] Figure 4 It is a structural block diagram of the cigar tobacco leaf airing lighting adjustment device of this embodiment. DETAILED DESCRIPTION

[0041] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0042] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0043] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Figure 1 1 is a hardware structure block diagram of a terminal of the cigar tobacco leaf airing lighting adjustment method of this embodiment. Figure 1 As shown, the terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data, wherein processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0044] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the cigar tobacco leaf drying light adjustment method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0045] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0046] In this embodiment, a method for adjusting the lighting during the drying of cigar tobacco leaves is provided. Figure 2 FIG. 1 is a flow chart of the method for adjusting the lighting of cigar tobacco leaves during airing according to the present embodiment. Figure 2 As shown, the process includes the following steps:

[0047] Step S201, obtaining the absorption spectrum data of the current cigar tobacco leaf.

[0048] During the drying process of cigar tobacco leaves, the illumination conditions play an important role in the quality of the cigar tobacco leaves after drying. The wavelength and intensity of illumination required for different drying stages are different. Providing accurate illumination conditions for cigar drying can improve the drying quality of cigar tobacco leaves. Before obtaining the absorption spectrum data of the current cigar tobacco leaves, the cigar tobacco leaf samples are first processed by the sample processing system, which includes a freeze dryer, a grinding device, a screening device, and a reagent and curing process. The cigar tobacco leaf samples collected by the freeze dryer are freeze-dried to remove moisture from the samples. Through low-temperature freezing and vacuum drying, the freeze dryer can maintain the original chemical composition and structural characteristics of the tobacco leaf samples and avoid chemical degradation caused by high-temperature drying. The freeze-dried tobacco leaf samples are ground into fine powder by a grinding device to improve the uniformity and reactivity of the samples. Through mechanical grinding, the tobacco leaf samples are crushed into tiny particles to ensure the consistency of the samples in subsequent analysis. Grinding can increase the contact area between the sample and the reagent, enhance the reaction efficiency, ensure the uniformity of the sample in spectral measurement, and reduce measurement errors. The larger particles in the ground sample are removed by screening equipment to ensure the uniform particle size of the sample. The fine particles that meet the requirements are screened out through sieves with different apertures to meet the accuracy requirements of spectral measurement, improve the uniformity of the sample, ensure the reliability of the measurement results, and reduce the spectral measurement error caused by different particle sizes. Polyurethane Acrylate (PUA) is used as a curing agent to solidify the ground and sieved tobacco powder into thin slices. The curing process ensures that the sample remains stable during the measurement process and avoids loose or deformed samples. The fixation stability of the sample is improved by curing to ensure the repeatability of the measurement process. The cured thin slices are easy to operate and store and are suitable for long-term analysis. Specifically, cigar tobacco samples are collected from the produced cigar tobacco leaves, and the collected cigar tobacco samples are dehydrated using a freeze-drying device. The specific conditions can be a temperature of -40°C, a vacuum degree of 0.2mbar, and a processing time of 24 hours. The freeze-dried cigar tobacco leaves are ground into 80-100 mesh powder using a pulverizer. Use a screening device to remove particles that are too large to ensure uniformity of powder particle size and avoid spectral measurement deviation. Take about 1g of processed cigar leaf powder, mix it with 5mL of polyurethane acrylate, and stir it thoroughly. Put the mixture into a UV irradiation device for curing. The curing time is set to 3 hours to ensure that the sample forms a transparent or translucent sheet. Use a polishing device to polish the cured sample until the surface of the sample is smooth and transparent for better spectral measurement. Select "scan mode" on the spectrophotometer to measure the absorbance of the cigar leaf sample slices. Collect once every 10 minutes and record the changes in the absorption intensity of the sample in different wavelength ranges. During the measurement process, ensure that the sample is not disturbed by external light sources, and use blackout curtains in the laboratory to isolate other light sources.The absorbance data of each wavelength is recorded at least three times, and the average value is taken to obtain the average spectrum curve of the sample to ensure the accuracy and repeatability of the measurement. Thus, the absorption spectrum data of the current cigar tobacco leaf is obtained.

[0049] Step S202, extracting the absorption peak and absorption change rate in the absorption spectrum data.

[0050] Specifically, the absorption peak is the maximum absorption intensity in each band, which is used to reflect the main absorption situation within a specific wavelength range. The absorption peak position is the wavelength corresponding to the absorption peak, which is used to mark the absorption position of the key band. The absorption bandwidth is defined as the wavelength range when the absorption intensity is half (50%) of the peak value, which is used to quantify the width of the absorption peak. Based on the absorption spectrum data of the acquired cigar tobacco leaves and the characteristics of the absorption spectrum data, the absorption peak of the key band is extracted, and based on the time series spectrum data, the absorption change rate of each band is calculated to observe the dynamic changes of the absorption intensity of each band over time.

[0051] Step S203, determining the target light intensity for the current cigar tobacco leaf drying according to the absorption change rate, and determining the target light wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate.

[0052] Specifically, by analyzing the absorption change rate, the degree of drying of the current cigar tobacco leaves can be obtained. For example, when the spectral absorption peak of a certain band is detected to rise rapidly and the absorption change rate continues to increase, it means that the chemical or physiological process corresponding to the band is accelerating. For example, in the yellowing stage, blue light is appropriately enhanced to accelerate chlorophyll degradation; red light is enhanced in the browning stage to promote sugar accumulation and aroma formation; near-infrared light is enhanced in the dry stage to accelerate water evaporation. In the yellowing period of cigar tobacco leaves, if the red light absorption peak continues to rise, it may indicate that the synthesis of sugar or aroma substances is active. At this time, the light intensity of this band can be enhanced to obtain a target light intensity to maintain or accelerate this process, thereby promoting the generation of target chemicals. When the spectral absorption peak of a certain band drops rapidly and the absorption change rate continues to decrease, it means that the chemical or physiological process corresponding to the band may be close to saturation or completion. For example, in the yellowing period, if the change rate of blue light absorption drops rapidly, it may indicate that the degradation of chlorophyll is close to completion. At this time, the blue light intensity should be gradually reduced to avoid energy waste or interference with other physiological processes. By monitoring the absorption change rate of the chromatic band, the dynamic changes of chemical or physiological processes in the cigar tobacco leaf curing process can be effectively judged. According to the change of the absorption change rate, the light intensity can be reasonably adjusted to not only optimize the curing effect, but also improve the efficiency of resource utilization, and ultimately improve the quality of cigar tobacco leaves.

[0053] The spectral characteristics of cigar tobacco leaves are closely related to the physiological process of tobacco. Different wavelengths of light need to be set for irradiation at different modulation stages to achieve the best modulation effect. Among them, the absorption peak is processed by a normalized function to obtain the normalized absorption intensity, and then the change rate of the absorption intensity of each wavelength is calculated, and the comprehensive score is calculated for each wavelength. The comprehensive score can be calculated by weighted summation, and the weight is allocated according to the absolute value of the change rate. By comparing the comprehensive scores of different wavelengths, the wavelength with the largest comprehensive score is selected as the target illumination wavelength.

[0054] Step S204, determining the target illumination conditions for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

[0055] Specifically, according to the target illumination wavelength and target illumination intensity detected in step S203, the illumination conditions of the cigar tobacco leaves in the current production process are adjusted, the illumination wavelength is modulated to the target illumination wavelength to ensure that the cigar tobacco leaves are irradiated with the optimal wavelength in the current modulation stage, and the illumination intensity is adjusted to the target illumination intensity to ensure that the cigar tobacco leaves are modulated with the optimal illumination intensity in the current modulation stage, thereby improving the quality of the tobacco leaves. By continuously collecting absorption spectrum data, calculating the absorption peak and absorption change rate, and continuously verifying whether the effect after dimming meets expectations; if a new round of absorption peak changes is detected, or the tobacco leaves have transitioned to the next stage, continue to make corresponding adjustments to the illumination intensity or band.

[0056] Through the above steps S201 to S204, the absorption spectrum data of the current cigar tobacco leaf is obtained; the absorption peak and the absorption change rate in the absorption spectrum data are extracted; the target light intensity for the current cigar tobacco leaf drying is determined according to the absorption change rate, and the target light wavelength for the current cigar tobacco leaf drying is determined according to the absorption peak and the absorption change rate; the target light conditions for the current cigar tobacco leaf drying are determined according to the target light wavelength and the target light intensity. Compared with the conventional drying process in the prior art that relies on a light source with a fixed wavelength and intensity for drying cigar tobacco leaves, this embodiment detects the absorption spectrum data of the cigar tobacco leaf, determines the light wavelength and light intensity required for drying the cigar tobacco leaf at the current stage according to the absorption peak and the absorption change rate in the absorption spectrum data, and realizes accurate adjustment of the light conditions during the drying process of the cigar tobacco leaf, so that the cigar tobacco leaf is modulated under the optimal light conditions, thereby improving the quality of the tobacco leaf.

[0057] In some of the embodiments, extracting the absorption peak and absorption change rate in the absorption spectrum data includes: sequentially smoothing, baseline correcting, and normalizing the absorption spectrum data; and extracting the absorption peak and absorption change rate in the normalized absorption spectrum data.

[0058] Specifically, before extracting features from the absorption spectrum data, in order to improve the accuracy and stability of the features, the absorption spectrum data needs to be preprocessed, including:

[0059] First, the absorption spectrum data is smoothed by using the Savitzky-Golay filtering method to reduce the impact of high-frequency noise on the spectrum curve and enhance data stability. The sliding window width can be set to 5-15 data points, and the order is generally 2 or 3. Among them, Savitzky-Golay filtering is a smoothing technique based on local polynomial fitting. By fitting a low-order polynomial in the neighborhood of each data point, and then replacing the value of the original data point with the value of the polynomial. In this way, not only can noise be effectively removed, but also the shape and characteristic peaks of the spectrum curve can be maintained. Among them, the sliding window width refers to the neighborhood size used to fit the polynomial around each data point. The choice of window width has an important influence on the smoothing effect: when the window width is small: the smoothing effect is weaker, but the detail information can be better retained. When the window width is large: the smoothing effect is stronger, but it may be over-smoothed, resulting in the loss of characteristic peaks. The sliding window width can be set according to actual needs, and this is not specifically limited in this embodiment.

[0060] Then, the baseline is corrected by removing the baseline drift using polynomial fitting or iterative reweighted least squares (IRLS). The effects of background light and equipment interference on the absorption intensity are eliminated. The weights are adjusted iteratively to reduce the influence of outliers on the fitting results.

[0061] Finally, the absorption intensity is normalized to the interval [0, 1] to reduce the influence of sample thickness or concentration differences.

[0062] The absorption peak and absorption change rate are extracted from the absorption spectrum data after normalization.

[0063] In another embodiment, the wavelength detection range of the absorption spectrum data is 200 nanometers to 2500 nanometers.

[0064] Specifically, the absorption spectrum detection range in this embodiment is 200 nanometers to 2500 nanometers. This selected range covers the ultraviolet light, visible light and near-infrared light regions, which can fully reflect the spectral characteristics of cigar tobacco leaves at different modulation stages, thereby achieving more accurate control of lighting conditions.

[0065] In some embodiments, the absorption spectrum data includes spectrum data in the ultraviolet region, the blue light region, the green light region, the red light region, and the near infrared region.

[0066] Specifically, through the analysis of the absorption spectrum data of cigar leaves, it is found that the lighting conditions required for cigar leaves at different stages of curing are different, and different lighting areas correspond to different change characteristics of cigar leaves:

[0067] Ultraviolet region (200-400nm): reflects the changes in secondary metabolites such as phenols and flavonoids in tobacco leaves;

[0068] Blue light region (400-500nm): mainly reflects the absorption characteristics of chlorophyll and evaluates photosynthesis and chlorophyll decomposition;

[0069] Green light region (500-600nm): reflects the changes in pigment distribution, light scattering and some flavonoids;

[0070] Red light region (600-700nm): mainly used to reflect sugar accumulation and aroma substance generation;

[0071] Near-infrared region (900-1500nm): reflects changes related to water evaporation and molecular vibration.

[0072] By detecting the absorption spectra of different areas and expanding the detection range, the optimal light wavelength and light intensity in different areas can be obtained, thereby achieving precise control of the lighting conditions of cigar tobacco leaves.

[0073] In another embodiment, determining the target light intensity of the current cigar tobacco leaf drying according to the absorption change rate includes: adjusting the type of light required for the drying stage according to the drying stage of the cigar tobacco leaf;

[0074] When the increase in the absorption change rate is greater than a preset threshold, the light intensity of the light type required in the drying stage is increased by a preset light intensity value to determine the target light intensity; when the decrease in the absorption change rate is less than a preset threshold, the light intensity of the light type required in the drying stage is reduced by a preset light intensity value to determine the target light intensity.

[0075] Specifically, by detecting the absorption characteristic values ​​and moisture content of the blue light, red light and near-infrared bands, it is determined whether the current stage is withering, yellowing, browning or dry rib stage. For example, if it is detected that both the blue light absorbance and the red light absorbance have dropped significantly, and the moisture content has dropped to a certain threshold, it may indicate that the tobacco leaves are entering the dry rib stage. After determining the modulation stage, observe the absorption change rate (ΔA) of the spectral absorption peak of a certain band: if ΔA> the preset threshold (for example, 0.02), it indicates a rapid rise, indicating that the chemical or physiological process of the cigar tobacco corresponding to the band is accelerating, and the light intensity of this band is enhanced by the preset light intensity value to obtain the target light intensity to maintain or accelerate the process, wherein the preset threshold and light intensity value can be set according to the actual situation. If ΔA<- the preset threshold (for example, -0.02), it indicates a rapid decline, indicating that the process corresponding to the band may be close to saturation or completion, and the light intensity of this band is reduced by the preset light intensity value to obtain the target light intensity, so as not to waste energy or interfere with other processes. For example, if the rate of change of blue light absorption decreases rapidly during the yellowing period, it means that the degradation of chlorophyll is almost complete, and the blue light intensity can be gradually reduced; if the red light absorption peak continues to rise, it means that the synthesis of sugars or aroma substances is active, and the red light irradiation can be enhanced.

[0076] Specifically, in the yellowing stage, the chlorophyll content is rich, the chlorophyll decomposes rapidly, the relative concentration of pigments such as carotenoids and polyphenols increases, resulting in significant changes in the absorption spectrum, further reduction of moisture, drastic changes in the optical properties of tobacco leaves, the absorption peak change rate reaches a peak, and the blue light absorption peak is high (such as Amax>1.0). At this time, the appropriate enhancement of blue light can promote the full degradation of chlorophyll. However, when the blue light absorption intensity drops rapidly (such as the change rate ΔA<-0.02), it means that the decomposition of chlorophyll is close to completion, and the blue light intensity should be gradually reduced to avoid unnecessary energy waste.

[0077] During the browning stage, the red light absorption peak usually shows an upward trend (such as the change rate ΔA>0.02). At this time, the intensity of the red light should be gradually increased to promote the rapid accumulation of sugars and the generation of aroma substances. When the absorption peak tends to be stable (such as the change rate ΔA≈0), the red light output intensity can be maintained to maintain the balance of metabolic activities.

[0078] During the dry stage, the near-infrared light absorption peak increases significantly, indicating that the water evaporation rate increases. At this time, the intensity of near-infrared light needs to be increased (gradually increased to 100% output) to accelerate the drying process of tobacco leaves and ensure uniform evaporation of water inside the leaves. If the absorption peak tends to saturation, the current light level should be maintained to avoid the adverse effects of over-drying on tobacco quality.

[0079] By continuously collecting absorption spectrum data and calculating the absorption peak and absorption change rate, the drying stage of the tobacco leaves can be determined in real time, and whether the effect after dimming is in line with expectations can be continuously verified; if a new round of absorption peak changes is detected, or the tobacco leaves have transitioned to the next stage, the light intensity or band will continue to be adjusted accordingly, thereby achieving real-time adjustment of the lighting conditions of the entire cigar tobacco leaves, realizing precise control of the lighting conditions, and improving the quality of cigar tobacco leaves.

[0080] In some embodiments, determining the target illumination wavelength for the current cigar tobacco leaf drying according to the absorption peak and the absorption change rate includes:

[0081] Calculate the normalized absorption intensity and absorption change rate at each wavelength;

[0082] According to the normalized absorption intensity and absorption change rate of each wavelength, the comprehensive score of each wavelength is obtained;

[0083] The wavelength with the largest comprehensive score is determined as the target light wavelength for the current cigar tobacco leaf drying.

[0084] Specifically, before calculating the target illumination wavelength, the band integral is calculated to quantify the "total absorption energy" or "cumulative absorption amount" of a certain band on the sample, so as to evaluate the comprehensive impact of a certain spectrum on the change of tobacco leaf chemical composition (such as chlorophyll, sugar, water, etc.), and lock the band range to be studied or adjusted, for example, to determine whether the band is worth strengthening or weakening. The band integral S is calculated by the following formula, and the absorption value of the key band is integrated to quantify the energy absorbed by the band:

[0085]

[0086] Among them, λ 1 and λ 2 is the start and end wavelength of the band, A(λ) is the absorption intensity, d is the differential sign, and λ is the wavelength.

[0087] Band integration can quantify the absorption energy of key bands, extract characteristic information, reduce data dimensions, and support quantitative analysis. By properly selecting the band range and integration method, the analysis effect of spectral data can be significantly improved.

[0088] The analysis band is determined by band integral analysis of the absorption intensity of the following band, and the target band is obtained. According to the time series spectral data, the absorption change rate ΔA of each band in the target band is calculated to reflect the dynamic change of the absorption intensity over time. The calculation formula of ΔA is as follows:

[0089]

[0090] Among them, A tis the absorption value at time t, and Δt is the time interval.

[0091] Reduce the dimension of the spectral data of the target band, extract the main components, reduce redundant information, and first calculate the covariance matrix C of the spectral data of the target band:

[0092]

[0093] Where: C is the covariance matrix (shape is D×D), describing the linear correlation of spectral data; N is the number of samples; x i is the spectral vector of the i-th sample (with a shape of D×1, where D is the number of wavelength points); μ is the spectral mean vector (with a shape of D×1), and the symbol T represents the transpose of the matrix.

[0094] Perform eigenvalue decomposition on the matrix, select the first k principal components, make the cumulative variance contribution rate reach more than 95%, and get the matrix C′:

[0095] C′=QΛQ T ;

[0096] Where Q is the eigenvector matrix, each column is an eigenvector, indicating the direction of the principal component, which is used to project the spectral data into the principal component space; Λ is the eigenvalue diagonal matrix, the elements on the diagonal are eigenvalues, indicating the variance of each principal component. T is the transpose of the matrix.

[0097] The spectral data C′ is projected into the principal component space to generate the eigenvector Z after dimensionality reduction.

[0098] Z=XQ k ;

[0099] Among them, Z is the data matrix after dimension reduction, with a shape of N×k; X is the original spectral data, with a shape of N×D; Q k The eigenvector matrix corresponding to the first k principal components has a shape of D×k, where D is the number of wavelength points. N is the number of rows in the data matrix after dimensionality reduction, indicating the number of samples.

[0100] Eigenvalue decomposition decomposes the covariance matrix into eigenvectors and eigenvalues ​​for extracting principal components. The principal components are selected by cumulative variance contribution, which can retain the main information of the data (such as 95% of the variance). After projecting into the principal component space, the data dimension is reduced from D to k, which is convenient for subsequent analysis and visualization.

[0101] The absorption characteristics of the characteristic areas detected in the experiment are shown in Table 1 below:

[0102] Table 1

[0103]

[0104] The target light wavelength is dynamically determined by the following formula:

[0105] λ select =argmax{f(A′(λ)),g(ΔA)};

[0106] Where: select is the illumination wavelength selected for the current stage; f(A′(λ)) is the normalized absorption peak function, which represents the absorption intensity at wavelength λ (normalized to the range of [0, 1]); ΔA is the absorption change rate function, which represents the rate of change of the absorption intensity at wavelength λ (dynamic characteristics of the reaction).

[0107] The dynamic determination steps of this formula are:

[0108] Calculate the normalized absorption peak function f(A′(λ)): For each wavelength λ, calculate the normalized absorption intensity f(A′(λ)).

[0109] Calculate the rate of change function: For each wavelength λ, calculate the rate of change g(ΔA) of the absorption intensity.

[0110] Calculate the comprehensive score: For each wavelength λ, calculate the comprehensive score f(A′(λ)), g(ΔA).

[0111] Select the optimal wavelength: Select the wavelength with the largest comprehensive score as the optimal illumination wavelength λ select .

[0112] By dynamically determining the appropriate illumination wavelength by normalizing the absorption peak function and the change rate function, the optimal illumination wavelength can be selected by comprehensively considering the absorption intensity and dynamic change characteristics. This method is applicable to the fields of spectral analysis, optical sensing, and light regulation.

[0113] This embodiment also provides a method for adjusting lighting during the drying of cigar tobacco leaves. Figure 3 FIG. 1 is a flow chart of another method for adjusting lighting for cigar tobacco leaves during airing according to the present embodiment. Figure 3 As shown, the process includes the following steps:

[0114] Step S301, obtaining absorption spectrum data of the current cigar tobacco leaf;

[0115] Step S302, performing smoothing, baseline correction and normalization on the absorption spectrum data in sequence; extracting the absorption peak and absorption change rate in the absorption spectrum data after normalization;

[0116] Step S303, according to the curing stage of the cigar tobacco leaves, the type of illumination required for the curing stage is correspondingly adjusted; when the increase of the absorption change rate is greater than a preset threshold, the illumination intensity of the type of illumination required for the curing stage is increased by a preset illumination intensity value to obtain a target illumination intensity; when the decrease of the absorption change rate is less than a preset threshold, the illumination intensity of the type of illumination required for the curing stage is reduced by a preset illumination intensity value to obtain a target illumination intensity;

[0117] Step S304, calculating the normalized absorption intensity and absorption change rate of each wavelength; obtaining a comprehensive score of each wavelength according to the normalized absorption intensity and absorption change rate of each wavelength; determining the wavelength with the largest comprehensive score as the target illumination wavelength for the current cigar tobacco leaf drying;

[0118] Step S305, determining the target illumination conditions for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

[0119] Specifically, in this embodiment, two experiments were performed to verify this method:

[0120] Experiment 1: Screening of ultraviolet, blue and green light wavelengths modulated by cigar tobacco leaves based on absorption spectral characteristics.

[0121] 1. Sample collection and processing:

[0122] Samples were collected from CX80 cigar tobacco leaves at the yellowing and browning stages, with 30 leaves randomly collected at each stage, for a total of 60 leaves. The samples were freeze-dried (temperature -40°C, vacuum 0.2mbar, time 24 hours), ground into 80-100 mesh powder, and sieved to remove large particles. 1g of powder was taken from each sample and mixed with 5mL of polyurethane acrylate to make transparent sheets to ensure the stability of spectral measurement.

[0123] 2. Spectral measurement and data analysis:

[0124] A UV-Vis spectrophotometer (200-700nm) was used to measure the spectrum and record the changes in the absorption intensity of tobacco leaf samples at different wavelengths. The absorption peak, band integral value and change rate ΔA were extracted.

[0125] 3. Key wavelength selection:

[0126] According to the absorption spectrum characteristics of cigar tobacco leaves at different modulation stages, key spectral parameters such as absorption peak, band integral value and change rate ΔA were extracted to obtain wavelengths with functional significance. These wavelengths are not the highest points of the absorption peak, but are based on the absorption characteristics of each band, which can effectively regulate key processes such as chlorophyll degradation, aroma substance generation and water evaporation.

[0127]

[0128] 4. Effect evaluation:

[0129] Sensory evaluation by professionals showed that after treatment with 365nm and 460nm light sources, the yellowing degree of tobacco leaves increased, the color became more uniform, and the "green vein" phenomenon was reduced. After treatment with 520nm light sources, the production of aroma substances in tobacco leaves increased, showing rich aromas such as honey, nuts and flowers, and the flavor was more mellow.

[0130] Experiment 2: Screening the wavelengths of red light and near-infrared light modulated by cigar tobacco leaves based on absorption spectral characteristics.

[0131] 1. Sample collection and processing:

[0132] Samples were collected from CX80 cigar tobacco leaves at the browning stage and the dry rib stage. Thirty leaves were randomly collected at each stage, for a total of 60 leaves. The samples were freeze-dried (temperature -40°C, vacuum 0.2mbar, time 24 hours), ground into 80-100 mesh powder, and large particles were sieved out. 1g of powder was mixed with 5mL of polyurethane acrylate for each sample to make a transparent sheet to ensure the stability of spectral measurement.

[0133] 2. Spectral measurement and data analysis:

[0134] A UV-Vis-NIR spectrophotometer (600-1500nm) was used to measure the spectrum and record the changes in the absorption intensity of tobacco leaf samples at different wavelengths. The absorption peak, band integral value and change rate ΔA were extracted.

[0135] 3. Key wavelength selection:

[0136] According to the absorption spectrum characteristics of cigar tobacco leaves at different modulation stages, key spectral parameters such as absorption peak, band integral value and change rate ΔA were extracted to obtain wavelengths with functional significance. These wavelengths are not the highest points of the absorption peak, but are based on the absorption characteristics of each band, which can effectively regulate key processes such as sugar accumulation, aroma substance generation and water evaporation.

[0137]

[0138]

[0139] 4. Effect evaluation:

[0140] According to sensory evaluation by professionals, after being treated with 680nm light source, the sugar accumulation of tobacco leaves increased significantly, showing a stronger sweet aroma. After being treated with 760nm and 850nm light sources, the moisture content of tobacco leaves became more uniform, the leaf cracking phenomenon was reduced, and the combustion was smoother.

[0141] Through the above steps S301 to S305, compared with the traditional air-drying process in the prior art that relies on a light source with a fixed wavelength and intensity to air-dry cigar tobacco leaves, this embodiment monitors the absorption spectrum data of cigar tobacco leaves in real time, determines the light wavelength and light intensity required for air-drying cigar tobacco leaves in the current stage according to the absorption peak and band absorption change rate in the absorption spectrum data, and realizes accurate adjustment of the light conditions during the air-drying process of cigar tobacco leaves, so that the cigar tobacco leaves are modulated under the optimal light conditions, thereby improving the quality of the tobacco leaves.

[0142] In this embodiment, a cigar tobacco leaf drying lighting adjustment device is also provided, which is used to implement the above-mentioned embodiments and preferred implementations, and will not be repeated hereafter. The terms "module", "unit", "subunit", etc. used below can be a combination of software and / or hardware that implements the predetermined functions. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0143] Figure 4 : is a structural block diagram of the cigar tobacco leaf airing lighting adjustment device of this embodiment, such as Figure 4 As shown, the device 40 includes: an acquisition module 41, an extraction module 42, a light condition determination module 43 and an adjustment module 44, wherein:

[0144] An acquisition module 41 is used to acquire the absorption spectrum data of the current cigar tobacco leaf;

[0145] An extraction module 42, used to extract the absorption peak value and the absorption change rate in the absorption spectrum data;

[0146] The illumination condition determination module 43 is used to determine the target illumination intensity for the current cigar tobacco leaf drying according to the absorption change rate; and to determine the target illumination wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate;

[0147] The adjustment module 44 is used to determine the target illumination conditions for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

[0148] In this embodiment, an electronic device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0149] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0150] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0151] S1, obtaining the absorption spectrum data of the current cigar tobacco leaf;

[0152] S2, extracting the absorption peak and absorption change in the absorption spectrum data;

[0153] S3, determining the target light intensity for the current cigar tobacco leaf drying according to the absorption change rate, and determining the target light wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate;

[0154] S4, determining the target illumination condition for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

[0155] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0156] In addition, in combination with the cigar tobacco leaf airing lighting adjustment method provided in the above embodiment, a storage medium can also be provided in this embodiment to implement. The storage medium stores a computer program; when the computer program is executed by the processor, any of the cigar tobacco leaf airing lighting adjustment methods in the above embodiment is implemented.

[0157] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0158] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0159] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0160] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0161] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0162] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A method for adjusting lighting during cigar tobacco leaf drying, characterized in that: include: Obtain the absorption spectrum data of the current cigar tobacco leaf; Extracting the absorption peak and the absorption change rate in the absorption spectrum data; Determine the target light intensity for the current cigar tobacco leaf drying according to the absorption change rate, and determine the target light wavelength for the current cigar tobacco leaf drying according to the absorption peak and the absorption change rate; The target illumination condition for the current cigar tobacco leaf drying is determined according to the target illumination wavelength and the target illumination intensity.

2. The method for adjusting lighting during cigar tobacco leaf drying according to claim 1, characterized in that: The extracting of the absorption peak value and the absorption change rate in the absorption spectrum data comprises: The absorption spectrum data is sequentially smoothed, baseline corrected and normalized; The absorption peak value and the absorption change rate in the absorption spectrum data after the normalization process are extracted.

3. The method for adjusting lighting during cigar tobacco leaf drying according to claim 1, characterized in that: The wavelength detection range of the absorption spectrum data is 200 nanometers to 2500 nanometers.

4. The method for adjusting lighting during cigar tobacco leaf drying according to claim 1, characterized in that: The absorption spectrum data includes spectrum data in the ultraviolet region, the blue light region, the green light region, the red light region and the near infrared region.

5. The method for adjusting lighting during cigar tobacco leaf drying according to claim 1, characterized in that: The step of determining the target light intensity for the current cigar tobacco leaf drying according to the absorption change rate includes: According to the curing stage of the cigar tobacco leaves, the type of light required for the curing stage is adjusted accordingly; When the increase range of the absorption change rate is greater than a preset threshold, the light intensity of the light type required for the drying stage is increased by a preset light intensity value to determine the target light intensity; When the decrease range of the absorption change rate is less than the preset threshold value, the illumination intensity of the illumination type required for the drying stage is reduced by the preset illumination intensity value to determine the target illumination intensity.

6. The method for adjusting lighting during cigar tobacco leaf drying according to claim 1, characterized in that: The step of determining the target illumination wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate comprises: Calculate the normalized absorption intensity and absorption change rate at each wavelength; Obtaining a comprehensive score for each wavelength according to the normalized absorption intensity and the absorption change rate of each wavelength; The wavelength with the largest comprehensive score is determined as the target illumination wavelength for the current cigar tobacco leaf drying.

7. A cigar tobacco leaf airing lighting adjustment device, characterized in that: include: Acquisition module, extraction module, illumination condition determination module and adjustment module, wherein: The acquisition module is used to acquire the absorption spectrum data of the current cigar tobacco leaf; The extraction module is used to extract the absorption peak value and the absorption change rate in the absorption spectrum data; The illumination condition determination module is used to determine the target illumination intensity for the current cigar tobacco leaf drying according to the absorption change rate; and to determine the target illumination wavelength for the current cigar tobacco leaf drying according to the absorption peak value and the absorption change rate; The adjustment module is used to determine the target illumination condition for the current cigar tobacco leaf drying according to the target illumination wavelength and the target illumination intensity.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. An electronic device comprising a memory and a processor, characterized in that: The memory stores a computer program, and the processor is configured to run the computer program to execute the cigar tobacco leaf airing lighting adjustment method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for adjusting lighting during cigar tobacco leaf drying according to any one of claims 1 to 6 are implemented.

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