Cigarette making machine air pressure feedback control system based on vision

Abstract

The invention discloses a cigarette making machine air pressure feedback control system based on vision, which comprises two industrial cameras which are respectively arranged on a cigarette making machine pointer instrument and a fan outlet pressure instrument, each industrial camera is connected with an industrial personal computer, the industrial personal computer is connected with a cigarette making machine controller and a frequency converter, the frequency converter is connected with a fan, and the fan is connected with a computer. And the fan outlet pressure instrument is arranged at the outlet of the fan. According to the vision-based air pressure feedback control system for the cigarette making machine, instrument readings of a pointer instrument and a fan outlet pressure instrument of the cigarette making machine are identified by adopting an industrial camera based on a vision identification technology, and feedback control is performed on a fan, so that the air pressure of the fan of the cigarette making machine is stable; the air pressure is not directly controlled, the air pressure is controlled from the source by controlling the rotating speed of the fan, the requirement of additionally arranging a control valve on a pipeline is reduced, and the original machine body structure of the cigarette making machine is not influenced; pID adjustment is carried out on the rotating speed of the draught fan influencing the pressure of the cigarette making machine, the control precision is high, and closed-loop control can be achieved without modifying the draught fan.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette production, and more specifically, to a wind pressure feedback control system of a cigarette making machine based on vision. Background Art

[0002] The cigarette making machine has two fans, large and small. The large fans on the current models have basically been replaced by centralized air supply. Currently, only the small fan is left on the machine. The small fan will run to control the suction of tobacco into the suction belt, and follow the suction belt into the leveler assembly to control the weight of the tobacco.

[0003] However, in actual operation, because the fan is directly controlled, it is impossible to dynamically adjust the fan when the machine has problems or stops running. In addition, the fan detection is only performed at the outlet during operation, and the actual wind pressure at the outlet will vary greatly, resulting in large changes in the wind pressure of the cigarette machine, which will cause a large burden on the subsequent adjustment of the leveler. Moreover, it is often impossible to maintain a relatively stable value, resulting in greater consumption.

[0004] Therefore, there is an urgent need for a vision-based wind pressure feedback control system for cigarette making machines. Summary of the invention

[0005] The purpose of the present invention is to provide a vision-based cigarette machine wind pressure feedback control system to solve the above-mentioned problems in the prior art. It can identify the instrument readings of the cigarette machine pointer instrument and the fan outlet pressure instrument based on visual recognition technology, and perform feedback control on the fan, thereby achieving the stability of the cigarette machine fan wind pressure.

[0006] The present invention provides a vision-based wind pressure feedback control system for a cigarette making machine, which includes: two industrial cameras, which are respectively installed on a pointer instrument of the cigarette making machine and a fan outlet pressure instrument, each of the industrial cameras is connected to an industrial computer, the industrial computer is connected to a cigarette making machine controller and a frequency converter, the frequency converter is connected to a fan, and the fan outlet pressure instrument is installed at the outlet of the fan.

[0007] As described above, in the vision-based wind pressure feedback control system for cigarette making machines, preferably, each of the industrial cameras is used to detect the swing amplitude of the cigarette making machine pointer instrument and the fan outlet pressure instrument, and send the detection results to the industrial computer.

[0008] As described above, in the vision-based wind pressure feedback control system for cigarette making machines, preferably, each of the industrial cameras includes a grayscale processing module, an angle judgment module and a data transmission module, wherein:

[0009] The grayscale processing module is used to perform grayscale processing on the images taken by the industrial camera respectively;

[0010] The angle judgment module is used to judge the instrument readings of the cigarette machine pointer instrument and the fan outlet pressure instrument respectively according to the pointer angle in the grayscale processed image;

[0011] The data transmission module is used to transmit the instrument reading obtained by the angle judgment module to the industrial computer.

[0012] As described above, in the vision-based cigarette making machine wind pressure feedback control system, preferably, the industrial computer includes an equipment speed data reading module for reading equipment speed data from the cigarette making machine controller, and the reading speed of the equipment speed data reading module matches the shooting speed of the industrial camera.

[0013] In the vision-based cigarette machine wind pressure feedback control system as described above, preferably, the industrial computer is used to perform PID adjustment on the frequency converter according to the equipment speed data and the detection results of each industrial camera, thereby adjusting the rotation speed of the fan.

[0014] As described above, in the vision-based wind pressure feedback control system for cigarette making machines, preferably, the industrial computer includes a database for storing the equipment speed data read from the cigarette making machine controller and the detection results of each industrial camera in corresponding partitions.

[0015] In the vision-based wind pressure feedback control system for cigarette making machines as described above, preferably, the industrial computer includes a normalization module for normalizing the equipment speed data read from the cigarette making machine controller.

[0016] In the vision-based cigarette machine wind pressure feedback control system as described above, preferably, the industrial computer includes a PID adjustment module for performing PID adjustment on the voltage, current and output frequency of the inverter output according to the equipment speed data and the detection results of each of the industrial cameras, thereby adjusting the rotation speed of the fan.

[0017] As described above, in the vision-based cigarette making machine wind pressure feedback control system, preferably, the industrial computer includes a control parameter reading module and a reading frequency setting module, wherein:

[0018] The control parameter reading module is used to read the control parameters of the inverter;

[0019] The reading frequency setting module is used to set the reading frequency of the control parameter reading module.

[0020] The present invention provides a vision-based wind pressure feedback control system for a cigarette making machine. An industrial camera is used to identify the instrument readings of a pointer instrument of the cigarette making machine and a fan outlet pressure instrument based on visual recognition technology, and feedback control is performed on the fan, thereby achieving stability of the wind pressure of the cigarette making machine fan. The wind pressure is controlled from the source by controlling the fan speed instead of directly controlling the wind pressure, thereby reducing the requirement for installing a control valve on the pipeline. No external sensor that affects the original movement is required, and the original body structure of the cigarette making machine is not affected. PID regulation is performed on the fan speed that affects the pressure of the cigarette making machine, and the control accuracy is high, and closed-loop control can be achieved without modifying the fan. An industrial computer is used as the main controller, and the performance is powerful. Visual recognition and control data acquisition of the frequency converter can be run simultaneously, and PID regulation can be performed at the same time, with high integration and convenient control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0022] Figure 1 A structural block diagram of an embodiment of a wind pressure feedback control system for a cigarette making machine based on vision provided by the present invention;

[0023] Figure 2 A schematic diagram of the working principle of an embodiment of a vision-based cigarette making machine wind pressure feedback control system provided by the present invention.

[0024] Explanation of the reference numerals: 1-pointer instrument of cigarette making machine, 2-pressure instrument of fan outlet, 3-industrial camera, 4-industrial computer, 5-controller of cigarette making machine, 6-frequency converter, 7-fan. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0026] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprises" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component. When a specific component is described as being connected to other components, the specific component may be directly connected to the other components without an intermediate component, or may not be directly connected to the other components but have an intermediate component.

[0028] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] like Figure 1 and Figure 2 As shown, the vision-based cigarette making machine wind pressure feedback control system provided in this embodiment includes: two industrial cameras 3, which are respectively installed on the cigarette making machine pointer instrument 1 and the fan outlet pressure instrument 2, each of the industrial cameras 3 is connected to an industrial computer 4, the industrial computer 4 is connected to a cigarette making machine controller 5 and a frequency converter 6, the frequency converter 6 is connected to a fan 7, and the fan outlet pressure instrument 2 is installed at the outlet of the fan 7.

[0031] The industrial cameras 3 are respectively used to detect the swing amplitude of the cigarette machine pointer instrument 1 and the fan outlet pressure instrument 2 , and send the detection results to the industrial computer 4 .

[0032] Specifically, each of the industrial cameras 3 includes a grayscale processing module, an angle judgment module and a data transmission module, wherein:

[0033] The grayscale processing module is used to perform grayscale processing on the images taken by the industrial camera 3 respectively;

[0034] The angle judgment module is used to judge the meter readings of the cigarette machine pointer meter 1 and the fan outlet pressure meter 2 respectively according to the pointer angles in the grayscale processed image;

[0035] The data transmission module is used to transmit the instrument reading obtained by the angle determination module to the industrial computer 4.

[0036] In the present invention, the angle judgment module of the industrial camera 3 uses the existing visual recognition algorithm to obtain the instrument data of the cigarette machine pointer instrument 1 and the fan outlet pressure instrument 2.

[0037] Furthermore, the industrial computer 4 includes an equipment speed data reading module for reading equipment speed data from the cigarette making machine controller 5 , and the reading speed of the equipment speed data reading module matches the shooting speed of the industrial camera 3 .

[0038] Furthermore, the industrial computer 4 is used to perform PID regulation on the frequency converter 6 according to the equipment speed data and the detection results of each of the industrial cameras 3 , thereby adjusting the rotation speed of the fan 7 .

[0039] Furthermore, the industrial computer 4 includes a database for storing the equipment speed data read from the cigarette machine controller 5 and the detection results of each industrial camera 3 in a partitioned and corresponding manner, so that the industrial computer 4 can call relevant data when performing PID control.

[0040] Furthermore, the industrial computer 4 includes a normalization module for normalizing the equipment speed data read from the cigarette machine controller 5, wherein, in the present invention, normalization refers to unifying the numerical units of the equipment speed data and the detection results of the industrial camera 3 on the cigarette machine pointer instrument 1 and the fan outlet pressure instrument 2.

[0041] Furthermore, the industrial computer 4 includes a PID adjustment module, which is used to perform PID adjustment on the voltage, current and output frequency of the inverter 6 output to the inverter 6 according to the equipment speed data and the detection results of each of the industrial cameras 3, thereby adjusting the rotation speed of the fan 7.

[0042] Furthermore, the industrial computer 4 includes a control parameter reading module and a reading frequency setting module, wherein:

[0043] The control parameter reading module is used to read the control parameters of the frequency converter 6. In one embodiment of the present invention, the control parameters include voltage, current and output frequency;

[0044] The reading frequency setting module is used to set the reading frequency of the control parameter reading module.

[0045] During operation, two industrial cameras 3 are used to detect the swing amplitudes of the cigarette machine pointer instrument 1 and the fan outlet pressure instrument 2 respectively, and the detection results are sent to the industrial computer 4; the industrial computer 4 reads the equipment speed data from the cigarette machine controller 5; the industrial computer 4 dynamically PID adjusts the frequency converter 6 according to the values ​​of the cigarette machine pointer instrument 1, the fan outlet pressure instrument 2 and the equipment speed, and feeds back the control parameters to the frequency converter 6 to adjust the speed of the fan 7 through the frequency converter 6 to achieve the effect of adjusting the wind pressure of the fan 7; at the same time, the industrial camera 3 transmits the adjusted wind pressure to the industrial computer 4 for re-adjustment, so as to stabilize the pressure of the fan 7 at a value in the shortest time.

[0046] Since the rotation speed of the fan 7 will affect the data display of the fan outlet pressure instrument 2 and the cigarette machine pointer instrument 1 at the outlet of the fan 7, the industrial camera 3, after measuring the new values ​​of the fan outlet pressure instrument 2 and the cigarette machine pointer instrument 1, transmits the data to the industrial computer 4 for PID control again, so as to stabilize the pressure parameters of the fan 7 of the cigarette machine according to the machine speed in the shortest time, and reduce the impact of the wind pressure change of the fan 7 on the overall operation of the cigarette machine.

[0047] The vision-based cigarette machine wind pressure feedback control system provided by the embodiment of the present invention adopts an industrial camera to identify the instrument readings of the cigarette machine pointer instrument and the fan outlet pressure instrument based on visual recognition technology, and performs feedback control on the fan, thereby achieving the stability of the cigarette machine fan wind pressure; the wind pressure is not directly controlled, but the wind pressure is controlled from the source by controlling the fan speed, reducing the requirement for installing a control valve on the pipeline; no external sensor that affects the original movement is required, and the original body structure of the cigarette machine is not affected; PID adjustment is performed on the fan speed that affects the pressure of the cigarette machine, and the control accuracy is high, and closed-loop control can be achieved without modifying the fan; an industrial computer is used as the main controller, which has powerful performance and can simultaneously run visual recognition and control data acquisition for the frequency converter, and perform PID adjustment at the same time, with high integration and convenient control.

[0048] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0049] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A vision-based wind pressure feedback control system for cigarette making machines, characterized in that: include: Two industrial cameras are respectively installed on the cigarette making machine pointer instrument and the fan outlet pressure instrument. Each of the industrial cameras is connected to an industrial computer. The industrial computer is connected to a cigarette making machine controller and a frequency converter. The frequency converter is connected to a fan. The fan outlet pressure instrument is installed at the outlet of the fan.

2. The vision-based cigarette making machine wind pressure feedback control system according to claim 1, characterized in that: Each of the industrial cameras is used to detect the swing amplitude of the pointer instrument of the cigarette making machine and the fan outlet pressure instrument, and send the detection results to the industrial computer.

3. The vision-based cigarette making machine wind pressure feedback control system according to claim 2, characterized in that: Each of the industrial cameras comprises a grayscale processing module, an angle determination module and a data transmission module, wherein: The grayscale processing module is used to perform grayscale processing on the images taken by the industrial camera respectively; The angle judgment module is used to judge the instrument readings of the cigarette machine pointer instrument and the fan outlet pressure instrument respectively according to the pointer angle in the grayscale processed image; The data transmission module is used to transmit the instrument reading obtained by the angle judgment module to the industrial computer.

4. The vision-based cigarette making machine wind pressure feedback control system according to claim 1, characterized in that: The industrial computer comprises an equipment speed data reading module for reading equipment speed data from the cigarette making machine controller, and the reading speed of the equipment speed data reading module matches the shooting speed of the industrial camera.

5. The vision-based cigarette making machine wind pressure feedback control system according to claim 4, characterized in that: The industrial computer is used to perform PID regulation on the frequency converter according to the equipment speed data and the detection results of each of the industrial cameras, thereby adjusting the rotation speed of the fan.

6. The vision-based wind pressure feedback control system for cigarette making machines according to claim 5, characterized in that: The industrial computer comprises a database for storing the equipment speed data read from the cigarette making machine controller and the detection results of each industrial camera in a partitioned and corresponding manner.

7. The vision-based cigarette making machine wind pressure feedback control system according to claim 5, characterized in that: The industrial computer comprises a normalization module for normalizing the equipment speed data read from the cigarette making machine controller.

8. The vision-based cigarette making machine wind pressure feedback control system according to claim 5, characterized in that: The industrial computer includes a PID adjustment module, which is used to perform PID adjustment on the voltage, current and output frequency of the inverter output to the inverter according to the equipment speed data and the detection results of each industrial camera, thereby adjusting the rotation speed of the fan.

9. The vision-based wind pressure feedback control system for cigarette making machines according to claim 5, characterized in that: The industrial computer includes a control parameter reading module and a reading frequency setting module, wherein: The control parameter reading module is used to read the control parameters of the inverter; The reading frequency setting module is used to set the reading frequency of the control parameter reading module.

Images