CN113003253A - Tobacco material storage and distribution uniformity detection control equipment and method based on laser scanning - Google Patents
Tobacco material storage and distribution uniformity detection control equipment and method based on laser scanning Download PDFInfo
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- CN113003253A CN113003253A CN202110204341.0A CN202110204341A CN113003253A CN 113003253 A CN113003253 A CN 113003253A CN 202110204341 A CN202110204341 A CN 202110204341A CN 113003253 A CN113003253 A CN 113003253A
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- stepping motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/08—Blending tobacco
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Abstract
The utility model provides a tobacco material stores detection controlgear of cloth homogeneity based on laser scanning, including storing up cabinet (1), linear laser scanner (4), programmable controller (5), information processing computer (6), information acquisition card (7), motor converter (8), dial material device (9), vertical step motor (10) and horizontal step motor (11) are constituteed, acquire the three-dimensional space characteristic of real-time tobacco material through laser scanner, these characteristics of algorithm characterization, generate the pulse signal of different frequencies and range, through programmable controller to horizontal and vertical step motor control, thereby the high homogeneity and the horizontal tiling homogeneity of control blanking.
Description
Technical Field
The invention relates to the technical field of tobacco processing, in particular to a device and a method for detecting and controlling the uniformity of tobacco material storage and distribution based on laser scanning.
Background
At the present stage, in order to ensure the goal of realizing the homogenization production of the cigarette products, the storage process link of the production and processing process becomes very important. The change of physical properties such as the moisture content and the filling value of the tobacco material after storage is influenced by a plurality of factors. In the storage link of the cigarette processing process, on one hand, the materials are fully mixed by storing the cloth, so that the mixing uniformity of the materials is improved; on the other hand, the water content of the material is balanced. Most of the storage cabinet material distribution processes at the present stage adopt a reciprocating distribution mode, and due to the fact that the size of the storage cabinet is large, the distribution height is easy to be uneven under the conditions that the distribution speed is lack of control and the material height is lack of real-time monitoring and control in the distribution process, the material is agglomerated, and the material storage quality is reduced; on the other hand, the storage capacity of the storage cabinet is reduced to some extent.
Disclosure of Invention
In order to overcome the existing defects, the invention provides a device and a method for detecting and controlling the uniformity of tobacco material storage cloth based on laser scanning.
A detection control device for uniformity of tobacco material storage and distribution based on laser scanning comprises a storage cabinet, a linear laser scanner, a programmable logic controller, an information processing computer, an information acquisition card, a motor frequency converter, a material shifting device, a longitudinal stepping motor and a transverse stepping motor, wherein the linear laser scanner is arranged above a belt transmission belt and is communicated with the information processing computer through the information acquisition card; the longitudinal stepping motor and the transverse stepping motor are respectively communicated with the information acquisition card and the motor frequency converter.
The method comprises the steps that point cloud two-dimensional information on the surface of a tobacco material in real time is obtained through a laser scanner, an information processing computer is used for carrying out data processing on the collected information to obtain tobacco shred surface three-dimensional information and flow information and carrying out visualization, uniformity evaluation is obtained through an algorithm, and signals are sent to a programmable controller; the programmable controller obtains the flow signal of PC, and sends different pulse signals to the step motor frequency converter through the programmable controller to control the rotating speed of the motor so as to control the actions of the belt in the transverse and longitudinal directions, and the method comprises the steps of
1. Controlling a transverse stepping motor based on the flow signal;
2. controlling a longitudinal stepping motor based on cross section material distribution;
wherein, the flow information of the tobacco material is obtained through an equation based on the control of a transverse stepping motor of the flow signal,
in the formula, VallThe volume of the material in the sampling time period, v is the falling speed of the material, T is the sampling time, i is the ith scanning line, alpha is the scanning angle range, alphapTo angular resolution, LiIs the ith scan line length, L'iThe length of the ith scanning line base line;
acquisition time T of material by lasernScanning to obtain current flow state information, and acquiring the current flow state information by the previous acquisition time Tn-1Comparing, performing frequency conversion control on the stepping motor to obtain stable flow of the material, wherein the formula is
In the formula, f is the pulse frequency of the stepping motor, d is the diameter of the roller of the stepping motor, K is the total pulse number required by the stepping motor to rotate for one circle, and v is the falling speed of the material in the formula, namely the moving speed of the stepping motor.
According to the control of the longitudinal stepping motor based on the material distribution of the cross section, after transverse material distribution is completed every time, signals need to be sent to the longitudinal motor, transverse material distribution is continued after a specific distance is moved, and the moving distance determines the longitudinal uniformity of the material. The cross section height information of the tobacco material falling in real time is obtained through a laser scanner, and the formula is
Px＝cos(α+αi)*(Li-Li0)
Py＝sin(α+αi)*(Li-Li0)
Wherein the horizontal plane perpendicular to the material movement direction is the x-axis and the material movement direction is the y-axis, wherein point (P)x，Py) Alpha is the initial scanning angle of the laser, alpha is any point of the cross section of the cut tobacco at a certain momentiFor the ith scanning line, LiDistance of laser to i-th bar of base line under no load, Li0Is the distance from the laser to the ith strip of the material, v is the material running speed, k is the kth sampling of the laser, f is the acquisition frequency of the laser,
the material distribution condition under the whole transverse flow is obtained through the real-time height information of the cross section of the cut tobacco, and the movement control formula of the longitudinal stepping motor is as follows:
wherein N is the number of pulses moving a specific distance, d is the diameter of the roller of the stepping motor, K is the total number of pulses required for one rotation of the stepping motor, and Px1And Px2The abscissa of the half of the peak on both sides.
The invention provides a device and a method for detecting and controlling the uniformity of tobacco material storage and distribution based on laser scanning.
Drawings
FIG. 1 is a schematic diagram of a detection control device for uniformity of tobacco material storage cloth based on laser scanning.
Fig. 2 is a schematic diagram of material cross-section height information.
Detailed Description
The following describes in detail a device and a method for detecting and controlling uniformity of a tobacco material storage cloth based on laser scanning according to the present invention with reference to the accompanying drawings and specific embodiments.
Fig. 1 shows that a detection control device for tobacco material storage and distribution uniformity based on laser scanning comprises a storage cabinet 1, a linear laser scanner 4, a programmable controller 5, an information processing computer 6, an information acquisition card 7, a motor frequency converter 8, a material shifting device 9, a longitudinal stepping motor 10 and a transverse stepping motor 11, wherein the linear laser scanner 4 is arranged above a belt transmission belt, the linear laser scanner 4 is communicated with the information processing computer 6 through the information acquisition card 7, the information processing computer 6 is communicated with the programmable controller 5, and the programmable controller 5 is respectively communicated with the motor frequency converter 8 and the material shifting device 9; the longitudinal stepping motor 10 and the transverse stepping motor 11 are respectively communicated with the information acquisition card 7 and the motor frequency converter 8.
The method comprises the steps that point cloud two-dimensional information on the surface of a tobacco material in real time is obtained through a laser scanner, an information processing computer is used for carrying out data processing on the collected information to obtain tobacco shred surface three-dimensional information and flow information and carrying out visualization, uniformity evaluation is obtained through an algorithm, and signals are sent to a programmable controller; the programmable controller obtains the flow signal of PC, and sends different pulse signals to the step motor frequency converter through the programmable controller to control the rotating speed of the motor so as to control the actions of the belt in the transverse and longitudinal directions, and the method comprises the steps of
1. Controlling a transverse stepping motor based on the flow signal;
2. controlling a longitudinal stepping motor based on cross section material distribution;
based on the control of the transverse stepping motor of the flow signal, the flow information of the tobacco material is obtained through an equation,
in the formula, VallThe volume of the material in the sampling time period, v is the falling speed of the material, T is the sampling time, i is the ith scanning line, alpha is the scanning angle range, alphapTo angular resolution, LiIs the ith scan line length, L'iThe length of the ith scanning line base line;
acquisition time T of material by lasernScanning to obtain current flow state information, and acquiring the current flow state information by the previous acquisition time Tn-1Comparing, performing frequency conversion control on the stepping motor to obtain stable flow of the material, wherein the formula is
In the formula, f is the pulse frequency of the stepping motor, d is the diameter of the roller of the stepping motor, K is the total pulse number required by the stepping motor to rotate for one circle, and v is the falling speed of the material in the formula, namely the moving speed of the stepping motor.
The control of the longitudinal stepping motor based on the cross section material distribution is realized by sending a signal to the longitudinal motor after the transverse material distribution is finished every time, continuing to perform the transverse material distribution after moving a specific distance, acquiring the cross section height information of the tobacco material falling in real time through the laser scanner, and adopting the formula
Px＝cos(α+αi)*(Li-Li0)
Py＝sin(α+αi)*(Li-Li0)
In the formula, levelThe direction of movement of the material perpendicular to the plane is the x-axis and the direction of movement of the material is the y-axis, wherein point (P)x，Py) Alpha is the initial scanning angle of the laser, alpha is any point of the cross section of the cut tobacco at a certain momentiFor the ith scanning line, LiDistance of laser to i-th bar of base line under no load, Li0Is the distance from the laser to the ith strip of the material, v is the material running speed, k is the kth sampling of the laser, f is the acquisition frequency of the laser,
the material distribution condition under the whole transverse flow is obtained through the real-time height information of the cross section of the cut tobacco, and the movement control formula of the longitudinal stepping motor is as follows:
wherein N is the number of pulses moving a specific distance, d is the diameter of the roller of the longitudinal stepping motor, K is the total number of pulses required for one rotation of the stepping motor, and Px1And Px2The abscissa of the half of the peak on both sides.
In one embodiment, a laser scanner is placed at the front side of the center of the conveyor belt and used for detecting the surface information of the fallen tobacco 2, an information processing computer is used for receiving signals transmitted by the laser scanner and a speed sensor, and data processing is carried out on collected light field information to obtain instantaneous tobacco material cross section information and unit sampling time flow information.
The length of the selected conveyor belt is about 20m, and the width of the selected conveyor belt is 0.4 m; the storage cabinet is 30m long, 2m wide and 3m high. The frequency of the stepping motor is set to be 10Hz, and the falling moving speed of the measured material is about 0.6 m/s. The laser emitter was placed approximately 0.3m on the front side of the middle of the conveyor belt, the frequency was set to 25Hz, and the scan angle was 70-110. The user can adjust to reasonable value according to the equipment parameter.
The sampling time T is set to 30s, and the formula is given every 60s
Performing a flow calculation, each calculation including a previous oneFlow information 30s after the sub-sampling and 30s before the next sampling. According to the formula
The moving speed of the stepping motor is obtained and controlled by a programmable controller.
After the transverse material distribution is finished every time, signals need to be sent to the longitudinal motor, and the transverse material distribution is continued after the longitudinal motor moves for a specific distance. The moving distance determines the longitudinal uniformity of the material, the height of the cross section shown in figure 2 can be obtained through the scanning data of the front transverse material distribution, and the wave crest of the second material distribution is under the wave trough of the previous time after the movement. The moving distance is
Finally, it should be noted that the above examples are only intended to describe the technical solutions of the present invention and not to limit the technical methods, the present invention can be extended in application to other modifications, variations, applications and embodiments, and therefore all such modifications, variations, applications, embodiments are considered to be within the spirit and teaching scope of the present invention.
Claims (4)
1. A detection control device for the tobacco material storage and distribution uniformity based on laser scanning comprises a storage cabinet (1), a linear laser scanner (4), a programmable controller (5), an information processing computer (6), an information acquisition card (7), a motor frequency converter (8), a material shifting device (9), a longitudinal stepping motor (10) and a transverse stepping motor (11), and is characterized in that the linear laser scanner (4) is arranged above a belt transmission belt, the linear laser scanner (4) is communicated with the information processing computer (6) through the information acquisition card (7), the information processing computer (6) is communicated with the programmable controller (5), and the programmable controller (5) is respectively communicated with the motor frequency converter (8) and the material shifting device (9); the longitudinal stepping motor (10) and the transverse stepping motor (11) are respectively communicated with the information acquisition card (7) and the motor frequency converter (8).
2. The method for detecting and controlling the uniformity of distribution of stored tobacco materials based on laser scanning according to claim 1, wherein the laser scanner is used for acquiring real-time point cloud two-dimensional information on the surface of the tobacco materials, the information processing computer is used for carrying out data processing on the acquired information to acquire and visualize three-dimensional information and flow information on the surface of tobacco shreds, and the uniformity evaluation is obtained through an algorithm to send signals to the programmable controller; the programmable controller obtains the flow signal of PC, and sends different pulse signals to the step motor frequency converter through the programmable controller to control the rotating speed of the motor so as to control the actions of the belt in the transverse and longitudinal directions, and the method comprises the steps of
1. Controlling a transverse stepping motor based on the flow signal;
2. and controlling a longitudinal stepping motor based on the distribution of the cross section materials.
3. The method of claim 2, wherein the control of the transverse stepping motor based on the flow signal first obtains the flow information of the tobacco material by an equation,
in the formula, VallThe volume of the material in the sampling time period, v is the falling speed of the material, T is the sampling time, i is the ith scanning line, alpha is the scanning angle range, alphapTo angular resolution, LiIs the ith scan line length, L'iThe length of the ith scanning line base line;
acquisition time T of material by lasernScanning to obtain current flow state information, and acquiring the current flow state information by the previous acquisition time Tn-1Comparing, performing frequency conversion control on the stepping motor to obtain stable flow of the material, wherein the formula is
In the formula, f is the pulse frequency of the stepping motor, d is the diameter of the roller of the stepping motor, K is the total pulse number required by the stepping motor to rotate for one circle, and v is the falling speed of the material in the formula, namely the moving speed of the stepping motor.
4. The method as claimed in claim 2, wherein the control of the longitudinal stepping motor based on the distribution of the cross-sectional material is performed, wherein after each transverse distribution is completed, a signal is sent to the longitudinal motor, the transverse distribution is continued after a specific distance is moved, and the cross-sectional height information of the tobacco material falling in real time is obtained by the laser scanner according to the formula
Px＝cos(α+αi)*(Li-Li0)
Py＝sin(α+αi)*(Li-Li0)
Wherein the horizontal plane perpendicular to the material movement direction is the x-axis and the material movement direction is the y-axis, wherein point (P)x，Py) Alpha is the initial scanning angle of the laser, alpha is any point of the cross section of the cut tobacco at a certain momentiFor the ith scanning line, LiDistance of laser to i-th bar of base line under no load, Li0Is the distance from the laser to the ith strip of the material, v is the material running speed, k is the kth sampling of the laser, f is the acquisition frequency of the laser,
the material distribution condition under the whole transverse flow is obtained through the real-time height information of the cross section of the cut tobacco, and the movement control formula of the longitudinal stepping motor is as follows:
wherein N is the number of pulses moving a specific distance, d is the diameter of the roller of the stepping motor, K is the total number of pulses required for one rotation of the stepping motor, and Px1And Px2The abscissa of the half of the peak on both sides.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804648A (en) * | 2021-09-18 | 2021-12-17 | 上海益实智能科技有限公司 | Tobacco online real-time monitoring device and application thereof in tobacco quality nondestructive rapid quality control |
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| CN212197634U (en) * | 2020-03-11 | 2020-12-22 | 陕西中烟工业有限责任公司 | Tobacco distributing device based on large-scale production |
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2021
- 2021-02-23 CN CN202110204341.0A patent/CN113003253B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8308190D0 (en) * | 1982-03-27 | 1983-05-05 | Molins Plc | Apparatus for determining mass and moisture content of tobacco |
| CN200974701Y (en) * | 2006-11-24 | 2007-11-14 | 武汉烟草(集团)有限公司 | Storage cabinet system capable of realizing tankage control quickly |
| CN101263928A (en) * | 2008-04-29 | 2008-09-17 | 厦门烟草工业有限责任公司 | Tobacco mixed ligand distribution device and method using the device to distribute material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804648A (en) * | 2021-09-18 | 2021-12-17 | 上海益实智能科技有限公司 | Tobacco online real-time monitoring device and application thereof in tobacco quality nondestructive rapid quality control |
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| CN113003253B (en) | 2022-12-16 |
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