CN-122016726-A - Method and device for monitoring tobacco shred material distribution and air pressure fluctuation in fluidized bed based on laser back scattering technology, electronic equipment and storage medium

CN122016726ACN 122016726 ACN122016726 ACN 122016726ACN-122016726-A

Abstract

The invention relates to the technical field of tobacco shred material conveying, in particular to a method, a device, electronic equipment and a storage medium for monitoring tobacco shred material distribution and air pressure fluctuation in a fluidized bed based on a laser back scattering technology, which comprises the following steps of obtaining laser signals after tobacco shreds passing through the fluidized bed are absorbed/scattered, and preprocessing the laser signals after the tobacco shreds passing through the fluidized bed; the method comprises the steps of constructing a calculation model of tobacco shred material distribution in a fluidized bed and a calculation model of air pressure fluctuation in the fluidized bed, respectively inputting preprocessed laser digital signals into the calculation model of tobacco shred material distribution in the fluidized bed and the calculation model of air pressure fluctuation in the fluidized bed, judging whether the tobacco shred material distribution in the fluidized bed is normal or not based on the tobacco shred material distribution in the fluidized bed or based on the air pressure fluctuation value in the fluidized bed, and solving the problems that the accuracy of the monitored result is low and the monitoring device is not used for monitoring the tobacco shred material distribution in the fluidized bed in the prior art because the air pressure fluctuation monitoring device in the fluidized bed is greatly influenced by environmental factors, and the real-time distribution of the tobacco shred material in the fluidized bed cannot be mastered.

Inventors

YANG CAIHONG
SHI YUNXIA
Liu Maochao
ZHANG MIN
GENG HUA
CHEN PENGCHAO
CAI PEILIANG
ZHU KAILIN
YI FANJUN
Yi Jincan
HUA WEI
ZHENG LIMING
ZHANG SIJIN
Yue Shaodong

Assignees

红云红河烟草(集团)有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (10)

1. A method for monitoring tobacco shred material distribution and air pressure fluctuation in a fluidized bed based on a laser back scattering technology is characterized by comprising the following steps: acquiring laser signals after being absorbed/scattered by tobacco shreds in a fluidized bed, and preprocessing the laser signals after passing through tobacco shred materials in the fluidized bed to acquire preprocessed laser digital signals; Constructing a tobacco shred material distribution form calculation model in the fluidized bed and an air pressure fluctuation calculation model in the fluidized bed, and respectively inputting the preprocessed laser digital signals into the tobacco shred material distribution form calculation model in the fluidized bed and the air pressure fluctuation calculation model in the fluidized bed to obtain tobacco shred material distribution form in the fluidized bed and air pressure fluctuation values in the fluidized bed; Judging whether the tobacco shred material form distribution in the fluidized bed is normal or not based on the tobacco shred material form distribution in the fluidized bed, and if the tobacco shred material form distribution in the fluidized bed is abnormal, correspondingly adjusting the rotating speed of a needle roller component poking in the tobacco shred material in the fluidized bed through an industrial personal computer while warning and reminding an operator; Judging whether the air pressure fluctuation in the fluidized bed is normal or not based on the air pressure fluctuation value in the fluidized bed, and if the air pressure fluctuation in the fluidized bed is abnormal, correspondingly adjusting the negative pressure air flow and the positive pressure air flow on the fluidized bed through the industrial personal computer while warning and reminding an operator.
2. The method for monitoring distribution and air pressure fluctuation of tobacco shred materials in a fluidized bed based on a laser back scattering technology as set forth in claim 1, wherein the step of obtaining the laser signal after absorption/scattering of tobacco shred materials in the fluidized bed, and preprocessing the laser signal after passing through the tobacco shred materials in the fluidized bed to obtain a preprocessed laser digital signal comprises the following steps: the laser is emitted to the tobacco shred materials conveyed by the conveying area in the fluidized bed through the laser emitter arranged on the side wall of the conveying area in the fluidized bed, and the laser is received by the laser receiver arranged on the other side wall of the conveying area in the fluidized bed after passing through the tobacco shred materials; the laser transmitter and the laser receiver are symmetrically arranged, and a fluidized bed conveying area is arranged between the laser transmitter and the laser receiver; acquiring a laser signal passing through the tobacco shred material from a laser receiver which receives the laser; and processing the laser signal passing through the tobacco shred material by an A/D conversion technology to obtain a preprocessed laser digital signal.
3. The method for monitoring distribution and air pressure fluctuation of tobacco materials in a fluidized bed based on a laser back scattering technology as set forth in claim 1, wherein the steps of constructing a calculation model of distribution form of tobacco materials in the fluidized bed and a calculation model of air pressure fluctuation in the fluidized bed, inputting the preprocessed laser digital signals into the calculation model of distribution form of tobacco materials in the fluidized bed and the calculation model of air pressure fluctuation in the fluidized bed respectively to obtain the distribution form of tobacco materials in the fluidized bed and the air pressure fluctuation value in the fluidized bed, and comprise the following steps: inputting the preprocessed laser digital signals into a constructed calculation model of the distribution form of the tobacco shred materials in the fluidized bed to obtain the distribution form of the tobacco shred materials in the fluidized bed, wherein the expression of the calculation model of the distribution form of the tobacco shred materials in the fluidized bed is as follows: Wherein Q is the flow distribution form of the tobacco shred materials in the fluidized bed, A is the cross-sectional area of the fluidized bed, V is the average speed of the tobacco shred materials, rho is the average concentration of the tobacco shred materials, L is the propagation path length of laser in the fluidized bed and is generally the width of the fluidized bed, alpha (rho) represents the absorption coefficient related to the concentration rho of the tobacco shred materials, beta (rho) is the scattering coefficient of the laser in the tobacco shred materials passing through the fluidized bed, and gamma (rho) is the scattering coefficient of the laser in the tobacco shred materials passing through the fluidized bed; Inputting the preprocessed laser digital signals into a constructed calculation model of the air pressure fluctuation in the fluidized bed to obtain the numerical value of the air pressure fluctuation in the fluidized bed, wherein the expression of the calculation model of the air pressure fluctuation in the fluidized bed is as follows: Wherein I is the laser digital signal intensity of the laser signal passing through the tobacco shred material of the fluidized bed, I 0 is the initial laser digital signal intensity, namely the initial intensity of the laser which does not pass through the tobacco shred material, sigma is an extinction coefficient, P is the air pressure in the fluidized bed, P 0 is the air pressure at room temperature, rho 0 is the tobacco shred material density at room temperature, and L is the propagation path length of the laser in the fluidized bed, which is generally the width of the fluidized bed.
4. The method for monitoring tobacco shred material distribution and air pressure fluctuation in the fluidized bed based on the laser back scattering technology as set forth in claim 1, wherein the method is characterized in that based on the tobacco shred material distribution form of the fluidized bed, whether the tobacco shred material distribution in the fluidized bed is normal is judged, if the tobacco shred material distribution in the fluidized bed is abnormal, the method can give an early warning to an operator while correspondingly adjusting the rotating speed of a needle roller component for poking in the tobacco shred material in the fluidized bed through an industrial personal computer, and comprises the following steps: Comparing the distribution form of the tobacco shred materials in the fluidized bed with the distribution form of the tobacco shred materials in a normal state, wherein the distribution form of the tobacco shred materials in the fluidized bed is uniformly distributed in the fluidized bed conveying area; If the distribution form of the tobacco shred materials in the fluidized bed is identical to the distribution form of the normal tobacco shred materials, the distribution form of the tobacco shred materials in the fluidized bed is normal; if the distribution form of the tobacco shred materials in the fluidized bed is denser or more sparse than the distribution form of the normal tobacco shred materials, the distribution form of the tobacco shred materials in the fluidized bed is abnormal; Under the condition that the distribution form of the tobacco shred materials in the fluidized bed is abnormal, the rotating speed of a needle roller component used for poking the tobacco shred materials into the fluidized bed in the fluidized bed is correspondingly adjusted through an industrial personal computer while the abnormal tobacco shred material distribution form is warned and displayed to an operator through a display; under the condition that the distribution form of the tobacco shred materials in the fluidized bed is normal, the normal distribution form of the tobacco shred materials is displayed to an operator based on a display, but the rotating speed of a needle roller part used for poking the tobacco shred materials into the fluidized bed in the fluidized bed is not correspondingly adjusted.
5. The method for monitoring distribution and air pressure fluctuation of tobacco shred materials in a fluidized bed based on a laser back scattering technology as set forth in claim 4, wherein when the distribution form of the tobacco shred materials in the fluidized bed is abnormal, the abnormal distribution form of the tobacco shred materials is warned and displayed to an operator through a display, and the rotating speed of a needle roller part used for poking the tobacco shred materials into the fluidized bed in the fluidized bed is correspondingly adjusted through an industrial personal computer, and the method comprises the following steps: If the distribution form of the tobacco shred materials in the fluidized bed is denser than the normal distribution form of the tobacco shred materials and is judged to be abnormal, the rotating speed of a needle roller component for poking the tobacco shred materials in the fluidized bed is regulated down by an industrial personal computer so as to control the quantity of the tobacco shred materials input into the fluidized bed while warning and reminding an operator and displaying the abnormal distribution form of the tobacco shred materials; If the distribution form of the tobacco shred materials in the fluidized bed is more sparse than the distribution form of the normal tobacco shred materials and is judged to be abnormal, the rotating speed of a needle roller component for poking the tobacco shred materials in the fluidized bed is regulated to be high through an industrial personal computer so as to control the quantity of the tobacco shred materials input into the fluidized bed while warning and reminding an operator and displaying the abnormal tobacco shred material distribution form at the moment.
6. The method for monitoring tobacco shred material distribution and air pressure fluctuation in the fluidized bed based on the laser back scattering technology as set forth in claim 1, wherein the method is characterized by judging whether the air pressure fluctuation in the fluidized bed is normal or not based on the air pressure fluctuation value in the fluidized bed, and if the air pressure fluctuation in the fluidized bed is abnormal, warning an operator while correspondingly adjusting the negative pressure air flow and the positive pressure air flow on the fluidized bed through an industrial personal computer, and comprises the following steps: comparing the air pressure fluctuation value in the fluidized bed with a preset air pressure fluctuation range threshold value; If the air pressure fluctuation value in the fluidized bed is within the preset air pressure fluctuation range threshold value, the air pressure fluctuation in the fluidized bed is normal; If the air pressure fluctuation value in the fluidized bed is not within the preset air pressure fluctuation range threshold value, the air pressure fluctuation in the fluidized bed is abnormal; Under the condition that the air pressure fluctuation in the fluidized bed is abnormal, the abnormal air pressure fluctuation value is warned and displayed to an operator through a display, and the negative pressure air flow and the positive pressure air flow in the fluidized bed are correspondingly regulated through an industrial personal computer; under the condition that the air pressure fluctuation in the fluidized bed is normal, the negative pressure air flow and the positive pressure air flow in the fluidized bed are correspondingly regulated by the industrial personal computer while the normal tobacco shred material distribution form is warned and displayed to an operator through the display.
7. The method for monitoring tobacco shred material distribution and air pressure fluctuation in a fluidized bed based on the laser back scattering technology as set forth in claim 6, wherein in the case that the air pressure fluctuation in the fluidized bed is abnormal, the method for monitoring tobacco shred material distribution and air pressure fluctuation in the fluidized bed by the laser back scattering technology includes the steps of: If the air pressure fluctuation in the fluidized bed is larger than the air pressure fluctuation range threshold value and is judged to be abnormal, the abnormal air pressure fluctuation value is warned and displayed to an operator through a display, and the air is input into the electromagnetic valve on the air pipe in the fluidized bed through the control of the industrial personal computer and the other electromagnetic valve on the other air pipe in the fluidized bed through the control of the industrial personal computer to perform corresponding actions, so that the air pressure fluctuation in the fluidized bed is indirectly regulated to be within the preset air pressure fluctuation range threshold value; if the air pressure fluctuation in the fluidized bed is smaller than the air pressure fluctuation range threshold value and is judged to be abnormal, the abnormal air pressure fluctuation value is warned and displayed to an operator through a display, and the air pressure fluctuation in the fluidized bed is indirectly regulated to be within the preset air pressure fluctuation range threshold value through corresponding regulation actions of an electromagnetic valve on an air pipe for inputting air into the fluidized bed and another electromagnetic valve on another air pipe for inputting air into the fluidized bed through control of an industrial personal computer.
8. Tobacco shred material distribution and air pressure fluctuation monitoring device in fluidized bed based on laser back scattering technique, its characterized in that includes: The laser signal acquisition/pretreatment module is used for acquiring laser signals after being absorbed/scattered by tobacco shreds in the fluidized bed, and carrying out pretreatment on the laser signals after passing through tobacco shred materials in the fluidized bed so as to acquire pretreated laser digital signals; The system comprises a fluidized bed tobacco shred material distribution form and fluidized bed air pressure fluctuation numerical calculation module, a fluidized bed tobacco shred material distribution form calculation module, a fluidized bed air pressure fluctuation calculation module and a fluidized bed air pressure fluctuation calculation module, wherein the fluidized bed tobacco shred material distribution form calculation module and the fluidized bed air pressure fluctuation calculation module are used for constructing a fluidized bed tobacco shred material distribution form calculation model and a fluidized bed air pressure fluctuation calculation model, and respectively inputting the preprocessed laser digital signals into the fluidized bed tobacco shred material distribution form calculation model and the fluidized bed air pressure fluctuation calculation model to obtain fluidized bed tobacco shred material distribution form and fluidized bed air pressure fluctuation numerical values; The system comprises a fluidized bed tobacco shred material distribution form judging module, a needle roller component, a control computer and a control computer, wherein the fluidized bed tobacco shred material distribution form judging module is used for judging whether the distribution of the fluidized bed tobacco shred material form is normal or not based on the distribution form of the fluidized bed tobacco shred material; the fluidized bed air pressure fluctuation judging module is used for judging whether the air pressure fluctuation in the fluidized bed is normal or not based on the air pressure fluctuation value in the fluidized bed, and if the air pressure fluctuation in the fluidized bed is abnormal, the negative pressure air flow and the positive pressure air flow on the fluidized bed are correspondingly regulated through the industrial personal computer while warning and reminding an operator.
9. An electronic device, the electronic device comprising: one or more processors; and a memory for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the method for tobacco material distribution and air pressure fluctuation monitoring in a fluidized bed based on laser back scattering technology as set forth in any one of claims 1-7.
10. A computer readable storage medium, characterized in that it stores computer instructions for causing a processor to implement the method for monitoring tobacco material distribution and air pressure fluctuations in a fluidized bed based on the laser back scattering technique according to any one of claims 1 to 7 when executed.

Description

Method and device for monitoring tobacco shred material distribution and air pressure fluctuation in fluidized bed based on laser back scattering technology, electronic equipment and storage medium Technical Field The invention relates to the technical field of tobacco shred conveying, in particular to a tobacco shred material distribution and air pressure fluctuation monitoring method, electronic equipment and a storage medium in a fluidized bed based on a laser back scattering technology. Background The fluidized bed is used as key equipment for conveying tobacco shreds, and the running stability of the tobacco shreds in the fluidized bed directly influences the production efficiency and the product quality. At present, in the tobacco rolling process, tobacco shred materials in a fluidized bed are flexibly conveyed upwards along a circular arc-shaped bed body of the fluidized bed under the cooperation of positive and negative pressure gas in the fluidized bed, and the conveying process of the tobacco shred materials in the fluidized bed is specifically referred to as figure 5 of the specification. As shown in fig. 5, the cut tobacco materials 2 in the fluidized bed on the rolling machine set are taken by a needle roller and then move along the direction indicated by an arrow 3 along the fluidized bed body 1, when the cut tobacco materials move to the position of the gas 5 in the fluidized bed, the gas blown out by the gas 5 can enable the lighter cut tobacco materials to move forwards in the fluidized bed (the pressure of the gas 5 is measured by a pressure gauge P1), and the heavier cut stems are separated downwards along the direction indicated by 6 to finish the first cut stem separation in the fluidized bed, then, in the process that the cut tobacco continues forwards in the fluidized bed, the negative pressure gas 4 above the fluidized bed has an upward adsorption effect (the pressure is measured by a pressure sensor P2), the bottom in the fluidized bed body has a positive pressure gas 7 (the pressure of the positive pressure gas 7 is measured by the pressure sensor P4), and the vertical part of the fluidized bed adsorbs the cut tobacco on a suction chamber negative pressure gas 5 (the pressure of the negative pressure gas is measured by the pressure sensor P3), so that the materials in the fluidized bed are enabled to be fully transported in the flexible bed along the fluidized bed, and the pressure of the cut tobacco is greatly influenced by the pressure fluctuation in the fluidized bed 5, and the pressure fluctuation in the fluidized bed 5 is very important to influence the fluidized pressure fluctuation in the fluidized bed 5. The pressure sensor is arranged on a pipeline far away from the fluidized bed and used for conveying air into the fluidized bed or a pipeline used for discharging air in the fluidized bed, so that a certain error exists in the actual air pressure fluctuation in the fluidized bed indirectly detected by the pressure sensor, when the conventional pressure sensors such as P1, P2, P3 and P4 are used for monitoring the air pressure in the fluidized bed, the conventional pressure sensors such as P1, P2, P3 and P4 are easily interfered by environmental factors such as high temperature, high pressure and tobacco materials, the accuracy of monitoring results is affected to a certain extent, namely, the accuracy of the monitoring structure is lower, in addition, besides the existing defects, when the tobacco materials are conveyed along the fluidized bed, the air pressure in the fluidized bed is easily fluctuated due to the air pressure of positive pressure air and negative pressure air in the fluidized bed, and the like, the air pressure in the fluidized bed is easily fluctuated, the air pressure in the fluidized bed is easily conveyed, the air chamber is unevenly, and the tobacco materials are not evenly conveyed, and the tobacco materials are not evenly blocked, and the tobacco materials are not evenly conveyed, and the tobacco materials are not always in the air chamber are stably, and the tobacco materials are in the state are in the place. If the situation occurs, the machine is stopped to clean the tobacco shreds at the air chamber, or the weight of the cigarettes is frequently adjusted, and the two modes can cause a plurality of problems such as reduced equipment efficiency, tobacco shred material waste and the like. Therefore, the real-time monitoring of the distribution form of the tobacco shred materials in the fluidized bed is particularly important for improving the product quality. For monitoring the distribution form of the tobacco shred materials conveyed by the fluidized bed, no suitable tobacco shred material distribution form monitoring equipment is found at present. Therefore, it is necessary to improve and design the monitoring equipment for monitoring the air pressure fluctuation in the fluidized bed and the tobacco shred material distribution form, so as to solv