Tobacco lamina laser measurement method and system, terminal equipment and storage medium

Abstract

The invention relates to the technical field of laser measurement, in particular to a tobacco lamina laser measurement method and system, terminal equipment and a storage medium. The method comprises the following steps: scanning tobacco lamina on a conveyor belt through a laser sensor to obtain real-time scanning data, and calculating laser contour data on the conveyor belt according to the real-time scanning data; according to the laser contour data, calculating to obtain flue-cured tobacco lamina flow data; evaluating the flow data of the flue-cured tobacco lamina to obtain an evaluation result, and adjusting and optimizing output parameters of the flue-cured tobacco lamina according to the evaluation result. Errors caused by influence of factors such as environment temperature and equipment vibration are avoided through laser measurement, the detection precision is improved, and the detection difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the field of laser measurement technology, and in particular to a method, system, terminal device and storage medium for laser measurement of cigarette sheets. Background Art

[0002] At present, most domestic redrying plants still use the traditional belt scale method to measure the flow of tobacco leaves. However, this method not only has low measurement accuracy, but also has many restrictions on installation conditions, such as the belt must be horizontal and the length must meet certain requirements, otherwise it will produce large measurement errors. It is easily affected by factors such as ambient temperature and equipment vibration. Summary of the invention

[0003] In view of this, an embodiment of the present application provides a smoke sheet laser measurement method, which can effectively solve the problem of measurement errors that are easy to occur.

[0004] In a first aspect, an embodiment of the present application provides a laser measurement method for a cigarette sheet, comprising:

[0005] Scanning the tobacco sheets on the conveyor belt by means of a laser sensor to obtain real-time scanning data, and calculating the laser contour data on the conveyor belt based on the real-time scanning data;

[0006] Calculating smoke flow data according to the laser profile data;

[0007] The tobacco leaf flow data is evaluated to obtain an evaluation result, and the output parameters of the tobacco leaf are adjusted and optimized according to the evaluation result.

[0008] In some embodiments, before scanning the cigarette pieces on the conveyor belt by the laser sensor, the method further includes:

[0009] In an empty belt state, the laser sensor is calibrated to determine the reference zero point of the laser sensor, the reference surface position of the conveyor belt, and the size of the laser pixel point.

[0010] In some embodiments, scanning the tobacco sheets on the conveyor belt by a laser sensor to obtain real-time scanning data includes:

[0011] The reflected laser is received by the imaging lens on the laser sensor, and the angle between the axis of the laser beam of the laser sensor and the optical axis of the imaging lens, the angle between the imaging plane and the optical axis of the imaging lens, the object distance, the image distance and the moving distance of the laser spot image point on the imaging plane are obtained.

[0012] In some embodiments, the step of calculating the laser profile data on the conveyor belt according to the real-time scanning data includes:

[0013] According to the triangulation principle, the height between the surface of the currently scanned cigarette and the reference plane is calculated;

[0014] The cross-sectional area of ​​the laser profile currently scanned is determined according to the height.

[0015] In some embodiments, determining the cross-sectional area of ​​the laser profile currently scanned according to the ΔH includes:

[0016] The calculation expression of the laser profile cross-sectional area is:

[0017]

[0018] Where, Y is the cross-sectional area of ​​the laser profile, n is the number of laser pixels, and x i is the actual length of the i-th laser pixel, ΔH i is the height of the ith laser pixel point between the surface of the cigarette sheet and the reference plane.

[0019] In some embodiments, the step of calculating the smoke flow rate data according to the laser profile data includes:

[0020] A basic parameter model of the cigarette flakes currently on the conveyor belt is obtained, the density of the cigarette flakes is determined according to the basic parameter model, and the current flow data of the cigarette flakes is obtained according to the laser profile data and the density of the cigarette flakes.

[0021] In some embodiments, obtaining current smoke sheet flow data according to the laser profile data and the smoke sheet density includes:

[0022] Calculating the volume of the cigarette sheet scanned within a preset unit time according to the laser profile data, and calculating the cigarette sheet flow rate within the unit time according to the cigarette sheet volume and the cigarette sheet density;

[0023] The calculation expression of the cigarette volume is:

[0024]

[0025] Where V is the volume of the cigarette per unit time, k is the number of laser profiles scanned per unit time, h is the sampling thickness of the jth laser profile, and Y j is the cross-sectional area of ​​the jth laser profile.

[0026] In a second aspect, the present application also provides a tobacco sheet laser measurement system, comprising: a laser sensor, a conveyor belt and a control terminal;

[0027] The laser sensor is arranged above the conveyor belt, and the laser beam of the laser sensor is perpendicular to the conveyor belt, and is used to scan and detect the cigarette sheets on the conveyor belt;

[0028] The control terminal is used to control the movement of the conveyor belt and execute the tobacco sheet laser measurement method.

[0029] In a third aspect, the present application further provides a terminal device, the terminal device comprising a processor and a memory, the memory storing a computer program, and the processor being used to execute the computer program to implement the smoke sheet laser measurement method.

[0030] In a fourth aspect, the present application further provides a computer-readable storage medium storing a computer program, which, when executed on a processor, implements the smoke sheet laser measurement method.

[0031] The embodiments of the present application have the following beneficial effects:

[0032] This application uses laser measurement to measure the laser profile data of the cigarette sheets on the conveyor belt, and then calculates the sheet cigarette flow data based on the laser profile data. It can accurately measure without the help of complex equipment, and will not be affected by problems such as ambient temperature, so as to obtain more accurate sheet cigarette flow data. Therefore, the subsequent evaluation results are more instructive for the output parameters and can increase the efficiency of adjustment and optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a tobacco sheet laser measurement system according to an embodiment of the present application is shown;

[0035] Figure 2 A schematic diagram of a smoke sheet laser measurement scenario in an embodiment of the present application is shown;

[0036] Figure 3 A schematic diagram of a process flow of a laser measuring method for cigarette sheets according to an embodiment of the present application is shown;

[0037] Figure 4 A schematic diagram of a triangulation scenario according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0039] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0040] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0041] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0042] The technical solution of the present application is applied to the flow measurement process of cigarette sheets. Compared with the traditional belt scale method, the present application uses laser measurement combined with pre-set cigarette sheet parameters to measure and calculate the cigarette sheet flow data, thereby avoiding the problem of inaccurate measurement caused by factors such as ambient temperature and equipment vibration in traditional methods.

[0043] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0044] Figure 1 The schematic diagram of the structure of the tobacco sheet laser measurement system of the embodiment of the present application is shown, which includes: a laser sensor 100, a conveyor belt 200 and a control terminal 300;

[0045] The laser sensor 100 is disposed above the conveyor belt 200 , and the laser beam of the laser sensor 100 is perpendicular to the conveyor belt 200 , and is used to scan and detect the cigarette sheets on the conveyor belt.

[0046] The control terminal 300 is used to control the movement of the conveyor belt 200 and calculate the flow rate of the cigarette sheets by receiving the scanning data of the laser sensor 100 .

[0047] Specifically, the actual scanning scene is as follows Figure 2 As shown, the laser sensor 100 will emit a laser beam to the conveyor belt 200, and the laser beam will be linear across the conveyor belt. At the same time, the laser sensor 100 will receive the laser reflection beam through the imaging device, and the corresponding scanning data can be obtained according to the laser reflection beam. These scanning data can be sent to the control terminal 300 for calculation to obtain real-time cigarette flow data.

[0048] It can be seen that the smoke sheet laser measurement system of this embodiment has a simple structure, and the conveyor belt does not need to be specially set up. It only needs to install a laser sensor on the conveyor belt through a clamp. The debugging and installation are simple and will not affect the normal assembly line architecture and workflow.

[0049] The smoke sheet laser measurement method is described below with reference to some specific embodiments.

[0050] Figure 3 A flow chart of a smoke sheet laser measurement method according to an embodiment of the present application is shown. Exemplarily, the smoke sheet laser measurement method comprises the following steps:

[0051] Step S100, scanning the cigarette sheets on the conveyor belt by means of a laser sensor to obtain real-time scanning data, and calculating the laser contour data on the conveyor belt based on the real-time scanning data.

[0052] Tobacco sheets are the product obtained after tobacco is processed and air-separated. The present application is applied to the process of detecting the flow rate of tobacco sheets. The laser sensor emits a laser to hit the tobacco sheets on the conveyor belt for scanning. After receiving the reflected laser beam, multiple scanning data can be obtained.

[0053] The laser sensor uses multiple laser points to form a strip of laser across the conveyor belt, so the multiple scan data obtained are the scan data corresponding to each laser pixel point.

[0054] For the convenience of explanation, Figure 4 As shown, these scanning data include the angle α between the beam axis of the laser sensor 100 and the optical axis of the imaging lens, the angle β between the imaging plane and the optical axis of the imaging lens, the object distance S and the image distance S', and the moving distance Δd of the laser spot image point on the imaging plane.

[0055] These data can be directly measured, such as the angle α, because the laser of the laser sensor 100 is vertically downward, and the optical axis of the imaging lens is pre-set, so the angle α is a value that can be calculated. The moving distance Δd of the laser spot image point on the imaging surface varies according to the reflected light, and can be directly measured according to the imaging range on the imaging surface.

[0056] Based on the above data, the laser profile data can be calculated.

[0057] It should be noted that the laser in this embodiment crosses the conveyor belt in a strip shape and hits the cigarette sheets on the conveyor belt. From the cross-section of the conveyor belt, an undulating laser profile will be formed. The cross-sectional area of ​​the laser profile is the laser profile data that needs to be calculated.

[0058] First, the height ΔH between the surface of the currently scanned cigarette and the reference plane is calculated based on the principle of triangulation measurement;

[0059] The cross-sectional area of ​​the laser profile currently scanned is determined according to the ΔH.

[0060] Because the cigarette pieces are piled on the conveyor belt, the laser will scan the surface of the cigarette pieces and the conveyor belt, so before starting the transmission work, a calibration operation will be performed to determine the reference zero point of the laser sensor, the reference surface position of the conveyor belt, and the size of the laser pixel point. In this way, the subsequent scanning work can be carried out correctly based on the calibration data.

[0061] The purpose of determining the reference zero point of the laser sensor is to determine the position where the laser hits, and the purpose of determining the reference surface position of the conveyor belt is to determine the horizontal height of the conveyor belt when there is no load. This height is used as a reference surface for calculation.

[0062] The position of the conveyor belt is a set reference position and can be considered as a horizontal plane in this scene. Therefore, ΔH can be calculated in combination with the triangulation principle.

[0063] First of all, according to the principle of triangle similarity, there is the following relationship:

[0064]

[0065] After sorting, we get:

[0066]

[0067] In this way, ΔH can be obtained based on the acquired scanning data.

[0068] It can be understood that ΔH is the height difference between the position where the laser hits and the reference surface. When the laser hits the cigarette sheet on the conveyor belt, this ΔH is a real number greater than 0. When the laser hits the conveyor belt, this ΔH is 0. Because the reference surface is based on the conveyor belt, even if it is not 0, it will be a very small number, which can be identified by setting a threshold. When the calculated ΔH is within the threshold, it is considered that the laser hits the conveyor belt at this time, and the ΔH is considered to be 0. Otherwise, it is considered that the laser hits the cigarette sheet on the conveyor belt, and the calculated ΔH value is retained.

[0069] It can be understood that the ΔH values ​​between all smoke sheets and the reference surface are retained here. Because the laser sensor scans by sending multiple laser points, the number of ΔH values ​​obtained is the same as the number of laser points, and these ΔH values ​​represent the height of the corresponding laser point location.

[0070] At this time, relative to the position of each laser pixel point, it is equivalent to a cube with a height of ΔH and a length of the laser pixel point. The laser pixel point can be regarded as a square. The size of each laser pixel point can be determined by pre-calibration, so the size of each laser pixel point is also known. Therefore, the cross-sectional area of ​​the laser contour of the area currently scanned by the laser can be calculated based on the ΔH of each pixel point.

[0071] Its calculation expression is:

[0072] The calculation expression of the laser profile cross-sectional area is:

[0073]

[0074] Where, Y is the cross-sectional area of ​​the laser profile, n is the number of laser pixels, and x i is the actual length of the i-th laser pixel, ΔH i is the height of the ith laser pixel point between the surface of the cigarette sheet and the reference plane.

[0075] For example, if there are 2000 laser pixel points on a laser strip, then the above n is 2000, which means that the cross-sectional areas corresponding to the 2000 laser pixel points are added together to finally obtain the cross-sectional area Y of the laser profile.

[0076] Among them, some laser pixels hit the conveyor belt, and their ΔH is 0, so the corresponding Y is also 0. Therefore, through the above calculation method, only the cross-sectional area of ​​the cigarette sheets stacked on the conveyor belt will be calculated, and other data will not be miscalculated.

[0077] The cross-sectional area is the area of ​​the contour formed by the line scanned by the laser in the direction of the conveyor belt. By calculating this area, the smoke flow data can be further calculated according to the settings.

[0078] Among them, the above-mentioned contour data will also be processed for noise reduction to ensure the smoothness of the data. It can be understood that the stacked leaves are still continuous, so the laser contour cross-sectional area calculated between two adjacent laser pixel points should not differ too much. Therefore, filtering can be used to remove values ​​with large deviations to remove some obviously erroneous data.

[0079] Step S200, calculating and obtaining the smoke sheet flow data according to the laser profile data.

[0080] The cigarette flow rate data refers to the mass of cigarettes transported by the conveyor belt in a specified unit of time, such as 1 kilogram per second.

[0081] The above steps have calculated the cross-sectional area of ​​the laser profile, which is the cross-sectional area of ​​the cigarette on the conveyor belt. It can be understood that the Y calculated in the above steps is a slice of a three-dimensional object, and laser sampling has a sampling frequency, and transmission also has a transmission speed, so each cross-sectional area Y collected has a corresponding sampling thickness h according to the sampling frequency and transmission speed, and the sampling thickness h is the product of the sampling frequency and the transmission speed. According to the sampling thickness and the cross-sectional area Y, the volume of the laser profile can be calculated.

[0082] In this way, as long as the length of the specified unit time is determined, it is possible to know how many laser profiles the laser sensor will collect within the unit time. As long as the volume of the laser profiles within the unit time is accumulated, the volume of the cigarette sheets transported within the unit time can be known.

[0083] Therefore, the calculation expression of the cigarette volume is:

[0084]

[0085] Where V is the volume of the cigarette per unit time, k is the number of laser profiles scanned per unit time, h is the sampling thickness of the jth laser profile, and Y j is the cross-sectional area of ​​the jth laser profile.

[0086] Once the volume of cigarettes per unit time is obtained, the mass of cigarettes transported per unit time can be determined as long as the density is known. The density varies according to the type of cigarettes and can be obtained in advance based on prior data. Therefore, as long as the type of cigarettes to be transported is determined before transmission, the corresponding density parameters can be determined. Therefore, the density is also a known value. Through the density and the calculated volume of cigarettes, the flow rate of cigarettes transported per unit time can be obtained.

[0087] The above k value can be determined according to the preset unit time and laser scanning frequency. According to the above formula, a smaller unit time can be set, such as 1 second or 1 minute, so that similar instantaneous flow data can be obtained. It can also be set to a longer time. For example, a piece of cigarette transmission may take one or two hours, so it can be set to two hours, so that the two-hour piece of cigarette flow can be obtained at one time.

[0088] Among them, the above-mentioned density can be obtained from the basic parameter model of the tobacco leaf. A corresponding basic parameter model can be established for each type of tobacco leaf. The model is an a priori model, which is established after collecting data on various tobaccos. In addition to providing density data, it can also provide the density of tobacco leaves in different parts of the corresponding type of tobacco, thereby providing more accurate data to achieve more accurate and effective calculations.

[0089] For example, different tobaccos have different relationship models between the natural stacking volume of tobacco leaves, moisture content and tobacco leaf weight, and the tobacco leaves on the conveyor belt are naturally stacked. Although the volume can be calculated in this embodiment, the volume is the natural stacking volume, and the gaps therein will also be calculated. Therefore, based on the relationship model between the natural stacking volume, moisture content and tobacco leaf weight, a more accurate density value can be obtained, thereby calculating more accurate tobacco leaf flow data.

[0090] Step S300, evaluating the tobacco leaf flow data to obtain an evaluation result, and adjusting and optimizing the tobacco leaf output parameters according to the evaluation result.

[0091] It should be noted that the smoke flow data detected here will be saved in real time to the database, and evaluation will be performed based on these data to generate corresponding curves. The fluctuation of the actual flow rate can be displayed in real time on the control device, so as to intuitively display the actual measurement status and measurement results.

[0092] The cigarette sheets on the conveyor belt are processed by the upstream processing line. For example, the cigarette sheets are output to the conveyor belt through the air separation outlet. Therefore, the cigarette sheet flow rate detected in this embodiment is actually the processing and shipment volume of the upstream processing line. By monitoring the cigarette sheet flow rate in real time, it can be determined whether the shipment volume of the upstream processing line is stable and at the expected shipment volume.

[0093] For example, if the theoretical output of a process used in the assembly line is x kilograms per minute, and the detected smoke sheet flow rate is much smaller than x, it means that there may be a problem with the output parameters of the process and it needs to be adjusted. If the detected smoke sheet flow rate fluctuates stably around x, it can be confirmed that the current output parameters are good and can be maintained. In addition, there may be abnormal situations such as large fluctuations in the smoke sheet flow rate and extreme instability. These abnormal shipment situations can be detected and identified through the above-mentioned smoke sheet flow rate. In response to different abnormal situations, the output parameters of the upstream process can be adjusted and optimized.

[0094] After the above-mentioned tobacco leaf flow data is stored, it can be analyzed in combination with data from multiple different time periods to find the relationship between the tobacco leaf flow and the output parameters of the upstream process and find the corresponding change rules, so as to better adjust the output parameters, thereby guiding the adjustment of process parameters and improving the technical effect of leaf threshing quality.

[0095] The measurement method of this embodiment can be used to measure tobacco leaves of different colors, different flow rates, and different moisture conditions, and can also provide stable measurement results for tobacco raw materials of different production areas and different grades. This multi-condition adaptability enables the technology of this embodiment to be widely used in various complex tobacco processing environments. Compared with the prior art, it can overcome the error problems caused by factors such as ambient temperature and equipment vibration, and provide a strong guarantee for quality control in the tobacco processing process.

[0096] The present application also provides a terminal device, the terminal device includes a processor and a memory, the memory stores a computer program, and the processor is used to execute the computer program to implement the laser measurement method of smoke sheets. For example, the terminal device can be a computer or a central control machine, etc., which can be used as a control terminal.

[0097] It can be understood that the device of this embodiment corresponds to the method of the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described repeatedly here.

[0098] Among them, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be a general-purpose processor, including a central processing unit (CPU), a graphics processing unit (GPU) and a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or at least one of other programmable logic devices, discrete gates or transistor logic devices, and discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0099] The memory may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory is used to store a computer program, and the processor may execute the computer program accordingly after receiving an execution instruction.

[0100] The present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed on a processor, the laser measurement method for smoke sheets is implemented.

[0101] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0102] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0103] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, 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, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0104] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A laser measurement method for cigarette sheets, characterized in that: include: Scanning the tobacco sheets on the conveyor belt by means of a laser sensor to obtain real-time scanning data, and calculating the laser contour data on the conveyor belt based on the real-time scanning data; Calculating smoke flow data according to the laser profile data; The tobacco leaf flow data is evaluated to obtain an evaluation result, and the output parameters of the tobacco leaf are adjusted and optimized according to the evaluation result.

2. The smoke sheet laser measurement method according to claim 1, characterized in that: Before scanning the cigarette pieces on the conveyor belt by the laser sensor, the method further comprises: In an empty belt state, the laser sensor is calibrated to determine the reference zero point of the laser sensor, the reference surface position of the conveyor belt, and the size of the laser pixel point.

3. The smoke sheet laser measurement method according to claim 1, characterized in that: The laser sensor is used to scan the tobacco sheets on the conveyor belt to obtain real-time scanning data, including: The reflected laser is received by the imaging lens on the laser sensor, and the angle between the axis of the laser beam of the laser sensor and the optical axis of the imaging lens, the angle between the imaging plane and the optical axis of the imaging lens, the object distance, the image distance and the moving distance of the laser spot image point on the imaging plane are obtained.

4. The smoke sheet laser measurement method according to claim 3, characterized in that: The step of calculating the laser profile data on the conveyor belt according to the real-time scanning data comprises: According to the triangulation principle, the height between the surface of the currently scanned cigarette and the reference plane is calculated; The cross-sectional area of ​​the laser profile currently scanned is determined according to the height.

5. The smoke sheet laser measurement method according to claim 4, characterized in that: Determining the cross-sectional area of ​​the laser profile currently scanned according to the height includes: The calculation expression of the laser profile cross-sectional area is: Where, Y is the cross-sectional area of ​​the laser profile, n is the number of laser pixels, and x i is the actual length of the i-th laser pixel, ΔH i is the height of the ith laser pixel point between the surface of the cigarette sheet and the reference plane.

6. The smoke sheet laser measurement method according to claim 1, characterized in that: The step of calculating the smoke flow data according to the laser profile data includes: A basic parameter model of the cigarette flakes currently on the conveyor belt is obtained, the density of the cigarette flakes is determined according to the basic parameter model, and the current flow data of the cigarette flakes is obtained according to the laser profile data and the density of the cigarette flakes.

7. The smoke sheet laser measurement method according to claim 6, characterized in that: The step of obtaining current smoke sheet flow data according to the laser profile data and the smoke sheet density includes: Calculating the volume of the cigarette sheet scanned within a preset unit time according to the laser profile data, and calculating the cigarette sheet flow rate within the unit time according to the cigarette sheet volume and the cigarette sheet density; The calculation expression of the cigarette volume is: Where V is the volume of the cigarette per unit time, k is the number of laser profiles scanned per unit time, h is the sampling thickness of the jth laser profile, and Y j is the cross-sectional area of ​​the jth laser profile.

8. A tobacco sheet laser measurement system, characterized in that: include: Laser sensors, conveyor belts and control terminals; The laser sensor is arranged above the conveyor belt, and the laser beam of the laser sensor is perpendicular to the conveyor belt, and is used to scan and detect the cigarette sheets on the conveyor belt; The control terminal is used to control the movement of the conveyor belt and execute the tobacco sheet laser measurement method according to any one of claims 1 to 7.

9. A terminal device, characterized in that: The terminal device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is used to execute the computer program to implement the laser measurement method for cigarette sheets according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The device stores a computer program, which, when executed on a processor, implements the smoke sheet laser measurement method according to any one of claims 1 to 7.

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