CN112520100B - Composite cigarette detection device and method for FOCKE packaging machine - Google Patents
Composite cigarette detection device and method for FOCKE packaging machine Download PDFInfo
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- CN112520100B CN112520100B CN202011305329.0A CN202011305329A CN112520100B CN 112520100 B CN112520100 B CN 112520100B CN 202011305329 A CN202011305329 A CN 202011305329A CN 112520100 B CN112520100 B CN 112520100B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
- B65B19/28—Control devices for cigarette or cigar packaging machines
- B65B19/30—Control devices for cigarette or cigar packaging machines responsive to presence of faulty articles, e.g. incorrectly filled cigarettes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
- B65B19/02—Packaging cigarettes
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Abstract
The invention discloses a composite cigarette detection device and method for FOCKE packaging machine, comprising a tobacco shred side image acquisition module, a tobacco shred side photoelectric acquisition module, a filter tip side image acquisition module, a controller and a human-computer interface. The tobacco shred side image acquisition module and the filter tip side image acquisition module comprise an LED light source and an industrial camera, the tobacco shred side photoelectric acquisition module comprises an emitting diode, a receiving diode and a signal amplification circuit, and the controller comprises a core control unit, an image acquisition communication interface, a photoelectric acquisition communication interface, an input/output interface and an Ethernet communication interface. The invention adopts a double detection mode of tobacco shred side vision, photoelectricity and filter tip side vision, can detect the defects of loose ends, missing nozzles and missing cigarettes of conventional cigarettes in a FOCKE packaging machine mould box, can accurately detect reverse cigarettes, disordered residual cigarettes and special filter tip cigarettes, and can better ensure the cigarette quality of cigarette packets compared with the traditional detection device.
Description
Technical Field
The invention relates to a composite cigarette detection device and method for an FOCKE packaging machine.
Background
In the cigarette processing production process, the tobacco shreds are coiled into cigarettes at the end of a cigarette making and connecting machine, then the cigarettes are conveyed to a packing machine through a conveying mechanism, and finally a plurality of cigarettes are packed into boxes through a mould box of the packing machine. In order to ensure the cigarette quality of the cigarette packet, a cigarette detection device is required to be installed on the packaging machine and used for detecting whether the cigarettes in the cigarette packet have the defects of empty ends, missing cigarettes and the like.
At present, the FOCKE packing unit mainly adopts a mechanical contact cigarette detector, and the detector indirectly obtains whether a cigarette has a blank or a missing cigarette through the contact of a moving mechanical probe and the cigarette. The detector has low detection sensitivity, can not effectively detect the counter-cigarettes and the messy residual cigarettes in the mold box, and easily causes the tobacco shreds to sink when a mechanical probe is contacted with a cigarette in the detection process, thereby influencing the attractiveness of the cigarette. In addition, when one cigarette is lacked in one pack of cigarettes and the arrangement of the smoke exhaust of the cigarette is scattered, the probability of missing cigarettes and missing detection also exists.
In recent years, part of domestic cigarette factories begin to popularize special-shaped cigarettes with filter tips having concave patterns, and mechanical contact cigarette detectors cannot detect the concave patterns of the filter tips.
Disclosure of Invention
The invention aims to design a composite cigarette detection device and a composite cigarette detection method for a FOCKE packaging machine, which are used for realizing the detection of the loose ends, the missing cigarettes and the missing mouths of the conventional cigarettes in a die box of the FOCKE packaging machine and simultaneously realizing the detection of reverse cigarettes, disordered residual cigarettes and special filter cigarettes.
In order to achieve the aim 1, the invention adopts the following technical scheme:
a composite cigarette detection device for FOCKE packaging machine is composed of a tobacco shred side image acquisition module, a tobacco shred side photoelectric acquisition module, a filter tip side image acquisition module, a controller and a human-computer interface;
preferably, the tobacco shred side image acquisition module and the filter tip side image acquisition module comprise an LED light source and an industrial camera, the tobacco shred side photoelectric acquisition module comprises an emitting diode, a receiving diode and a signal amplification circuit, and the controller comprises a core control unit, an image acquisition communication interface, a photoelectric acquisition communication interface, an input/output interface and an Ethernet communication interface;
the tobacco shred side image acquisition module and the filter tip side image acquisition module are respectively responsible for acquiring images of a tobacco shred end and a filter tip end of a tobacco shred and transmitting the images to the controller; the cut tobacco side photoelectric acquisition module is responsible for acquiring the end voltage of cut tobacco of a cigarette and transmitting the voltage to the controller; the controller analyzes images of the tobacco shred end by using an image processing technology, judges whether defects such as empty ends, reverse branches and disordered residual cigarettes exist or not, analyzes images of the filter tip end, judges whether defects such as missing mouths, missing branches, reverse branches and abnormal special filter tips exist or not, simultaneously virtualizes voltage collected by a photoelectric module into a digital image by using a photoelectric image virtualization technology, judges whether defects such as empty ends exist or not by image analysis, and finally sends a signal to a control system of the packing machine according to a judgment result; the human-computer interface is mainly used for operating human-computer interface software, providing a human-computer interaction operation interface, facilitating a user to check operation information, detection data, set parameters and the like, and communicating with the controller through the gigabit Ethernet.
Preferably, two image acquisition communication interfaces in the controller are respectively connected with industrial cameras in the tobacco shred side image acquisition module and the filter tip side image acquisition module, the photoelectric acquisition communication interfaces are connected with receiving diodes in the tobacco shred side photoelectric acquisition module, the three interfaces are connected to a core control unit in the controller, the core control unit is also connected with an input/output interface, a core processing module and an Ethernet communication interface in the controller, the input/output interface is connected with a packing unit control system, the Ethernet communication interface is connected with an Ethernet switch, and the Ethernet switch is connected with a human-computer interface.
Preferably, on the double-channel FOCKE packaging machine, a die box is installed on each side of the heptagon turret, and the cut tobacco side photoelectric acquisition module is installed at the original mechanical contact type sensor, penetrates through a cut tobacco baffle plate, pushes cigarettes uniformly and moves along with the mechanical arm; the tobacco shred side image acquisition module and the filter tip side image acquisition module are respectively and statically fixed on the tobacco shred baffle and are aligned to the tobacco bale at the same station.
Preferably, in the pipe tobacco side image acquisition module, a cigarette pipe tobacco tip is located the glass window left side, and the level crossing is laid in the below, and industry camera and level crossing are certain angle, and the LED light source throws light on to a cigarette along the industry camera direction of shooing.
Preferably, in the filter tip side image acquisition module, a cigarette filter tip is located the glass window left side, and the LED light source throws light on with a cigarette tip certain angle, industry camera perpendicular filter tip end-face mounting.
Preferably, in the cut tobacco side photoelectric acquisition module, in the shell, a signal processing board, a signal amplifying board, a signal modulating board, a transmitting board and a receiving board are sequentially arranged and fixed through connectors between boards, wherein for the signal processing board, the signal amplifying board and the signal modulating board, copper padding columns are welded between adjacent boards, a transmitting diode and a receiving diode are respectively welded on the transmitting board and the receiving board, a light guide rod penetrates through the receiving board, one end of the light guide rod is connected with the transmitting tube, and the other end of the light guide rod is connected with the receiving tube; one end of the shell is provided with an 8-core interface, and the other end of the shell is provided with an optical filter; one transmitting tube corresponds to one light guide rod, and 4 receiving tubes are arranged around the light guide rod; embedding the transmitting tube into the inner cavity of a transmitting plastic partition plate, and placing the transmitting plastic partition plate between a transmitting plate and a receiving plate; the receiving pipe is embedded in the inner cavity of the receiving plastic partition plate, and the receiving plastic partition plate is placed between the receiving plate and the shell.
Preferably, the controller comprises an industrial control board and a control board, the industrial control board is provided with a visual detection controller, and the control board is sequentially distributed with an ethernet interface, a USB interface, a VGA interface and an IO signal interface from top to bottom.
Preferably, the middle of the human-computer interface is a touch display screen, and shortcut keys are distributed on two sides from top to bottom; the touch display screen is a 10.4-inch color liquid crystal touch display screen, and the resolution is 1024 x 768.
In order to achieve the aim 2, the invention adopts the following technical scheme:
a composite cigarette detection method for FOCKE packaging machine adopts the composite cigarette detection device based on machine vision technology and photoelectric detection technology, and comprises the following steps:
step 1: after an input/output interface of the controller receives a trigger signal of a control system of the packing unit, the core control unit controls the tobacco shred side image acquisition module, the filter tip side image acquisition module and the tobacco shred side photoelectric acquisition module to respectively acquire an image of the end part of the tobacco shred, an image of the end part of the filter tip and voltage of the end part of the tobacco shred and transmits data to the core processing module for image analysis;
step 2: sending a corresponding rejection signal and a diagnosis signal to a packaging unit control system through an input/output interface according to an image analysis result;
and step 3: the controller is communicated with the human-computer interface through the Ethernet switch, acquires image and voltage data, and displays the processing effect on the human-computer interface in real time;
and 4, step 4: an operator checks the relevant information of the system operation through a human-computer interface display screen, and sets the relevant parameters of the system through a touch screen.
Preferably, the image analysis process in step 1 includes processing of the tobacco end image, the filter end image and the tobacco end voltage: the processing of the tobacco shred end image and the filter tip end image comprises the following steps:
step 1.1.1: preprocessing images of the tobacco shred and the filter tip end part, including filtering and denoising, brightness compensation correction and distortion correction;
step 1.1.2: setting an interest area (including a cigarette shaking range) larger than the diameter of each cigarette at each cigarette position;
step 1.1.3: accurately separating the current cigarettes in the interest area through a cigarette automatic positioning technology combining projection and distance transformation, and sequentially carrying out graying, binaryzation, corrosion, expansion, searching and drawing the outline of the tobacco shred or the filter tip;
step 1.1.4: calculating the outline area, namely the pixel number of the interest area, namely the pixel number of the target, and judging whether the defect of empty head or missing support exists or not according to the pixel number;
the method comprises the following steps of:
step 1.2.1: performing voltage data image virtualization on the voltage of the end part of the tobacco shred, and converting the 0-5V voltage of the tobacco shred side of each cigarette into 0-255 gray values according to 256 gray levels;
step 1.2.2: drawing a circle with the same diameter as the cigarette at the position corresponding to the cigarette in the empty image, and filling the circle with the converted gray value;
step 1.2.3: according to an image processing method, performing gray image histogram statistics to obtain a gray value with the maximum pixel number, namely the gray value of the current cigarette, and judging whether the empty head defect exists or not according to the gray value.
In addition, the visual and photoelectric images are combined and associated on the detection result of the empty head, namely the visual and photoelectric detection effects can be simultaneously checked through the tobacco shred visual images.
The invention has the following beneficial technical effects:
the invention innovatively combines the machine vision technology and the photoelectric detection technology to be applied to the cigarette detection of the FOCKE packing machine, can detect the blank cigarette, the missing cigarette and the missing cigarette defects of the conventional cigarettes, and can accurately detect the reverse cigarette, the messy residual cigarettes and the special filter cigarettes; the cigarette loose end detection is carried out by adopting two detection modes, which complement each other and have higher accuracy; in addition, photoelectricity and visual detection image are associated completely, can provide clear audio-visual detection effect, and the photoelectricity debugging is more convenient, can guarantee the cigarette quality of tobacco bale better than traditional detection device.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention;
FIG. 2 is a front sectional view of a cut tobacco side image acquisition module;
wherein 201 is a glass window; 202 is a plane mirror; 203 is an industrial camera and lens, 204 is an LED light source;
FIG. 3 is a front cross-sectional view of a filter side image capture module;
wherein 401 is an LED light source, 402 is a glass window, and 403 is an industrial camera and a lens;
in fig. 4, a is a front cross-sectional view of the cut tobacco side photoelectric acquisition module, and b is a side view of the cut tobacco side photoelectric acquisition module;
wherein 501 is an 8-core interface and nut (including a lead and a plastic socket); 502 is an M3 socket head cap screw; 503 is a signal processing board; 504 is an inter-board connector; 505 is a signal amplification board; 506 is a copper pad column; 507 is a signal modulation board; 508 is a transmitting plate; 509 is an emitting diode; 510 is a receiving plate; 511 is a receiving diode; 512 is a transmitting plastic clapboard; 513 is a receiving plastic spacer; 514 is a filter; 515 is a light guide column; 516 is a shell; 517 is an M2.5 cross pan head screw; 518 is a cover;
FIG. 5 is a front and left side view of the controller;
wherein 601 is an ethernet interface; 602 is a USB interface; 603 is a VGA interface; 604 is an IO signal interface;
FIG. 6 is a process flow diagram of the present invention;
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in a circuit block diagram of the invention in figure 1, the composite cigarette detection device for the FOCKE packaging machine is composed of a tobacco shred side image acquisition module, a tobacco shred side photoelectric acquisition module, a filter tip side image acquisition module, a controller and a human-computer interface.
Specifically, two image acquisition communication interfaces in the controller are respectively connected with industrial cameras in the tobacco shred side image acquisition module and the filter tip side image acquisition module, the photoelectric acquisition communication interfaces are connected with a receiving diode in the tobacco shred side photoelectric acquisition module, the three interfaces are connected to a core control unit in the controller, the core control unit is also connected with an input/output interface, a core processing module and an Ethernet communication interface in the controller, the input/output interface is connected with a packaging unit control system, the Ethernet communication interface is connected with an Ethernet switch, and the Ethernet switch is connected with a human-computer interface.
The installation position of the acquisition module on the double-channel FOCKE packing machine is that a die box is installed on each side of the heptagon turret, the turret starts to perform circular motion after a cigarette is pushed into the die box, the cigarette is subjected to head missing detection through the tobacco shred side photoelectric acquisition module, and then visual head missing, cigarette missing and the like detection are performed through the tobacco shred side image acquisition module and the filter tip side image acquisition module; the cut tobacco side photoelectric acquisition module is arranged at the original mechanical contact sensor, moves along with the mechanical arm, passes through the cut tobacco baffle, pushes the cigarettes uniformly and simultaneously carries out the blank photoelectric detection; the tobacco shred side image acquisition module and the filter tip side image acquisition module are respectively and statically fixed on the mounting baffle plate and are aligned to the tobacco bale on the same station, so that the tobacco shred side image acquisition module and the filter tip side image acquisition module are simple and reliable.
As shown in the front cross-sectional view of the tobacco shred side image acquisition module in fig. 2, the end of tobacco shred of a cigarette is located at the left side of a glass window 201, a plane mirror 202 is laid below the module, an industrial camera 203 shoots the image of the end of the tobacco shred of the cigarette at a certain angle through the plane mirror 202, an LED light source 204 illuminates the cigarette along the shooting direction of the industrial camera, and the size of the image acquisition module can be greatly reduced through mirror image imaging of the plane mirror; when the cigarette is empty, the white coil paper of the cigarette is illuminated, the tobacco shred area shot by the system is smaller than that of a normal cigarette, the greater the empty degree of the cigarette is, the smaller the tobacco shred area shot is, and the system can judge whether the cigarette has the empty according to the image area of the tobacco shred area shot by each cigarette.
As shown in the front cross-sectional view of the image acquisition module at the filter side in fig. 3, the end of the cigarette filter is positioned at the left side of the glass window 402, the LED light source 401 is installed at a certain angle with the cigarette to illuminate the end face of the cigarette filter, and the industrial camera 403 is installed perpendicular to the end face of the filter; when the mold box is lack of a mouth or a mouth, the light source of the lack of the mouth or the part of the lack of the mouth in the mold box can not irradiate into the mold box, and the system can judge that the defects of the lack of the mouth, the reverse mouth and the like exist in the mold box.
As shown in the front sectional view and the right side view of the photoelectric collection module on the tobacco shred side of fig. 4, the emitting diode 509 and the receiving diode 511 are respectively welded on the emitting plate 508 and the receiving plate 510, the optical filter 514 is adhered on the housing 516 by special optical glue, then the emitting plastic partition 512 is placed between the emitting plate 508 and the receiving plate 510, the emitting plate 508 and the receiving plate 510 are fixed by the plate-to-plate connector 504, and then the light guide column 515 is inserted into the emitting plastic partition 512 after passing through the receiving plate 510 until abutting against the emitting diode 509; respectively welding copper pad columns 506 on the signal processing plate 503, the signal amplifying plate 505 and the signal modulating plate 507, inserting the connectors 504 between every two plates in a mutual insertion mode according to the sequence shown in the drawing, and then fixing the connectors in the screw holes of the shell 516 through M2.5 cross pan head screws 517; the 8-core interface and nut 1 are screwed onto the cap 518, then the plastic socket of the 8-core interface and nut 501 is inserted into the socket on the MCU board 503, and finally the cap 518 is fixed to the housing 516 by means of M3 socket head cap screws 502.
Specifically, the emitting diode 509 guides infrared light out to the optical filter 514 through the light guide column 505 at the front end and then irradiates on the end part of tobacco shreds of a cigarette, the tobacco shreds can reflect partial light, the receiving diode 511 receives the infrared light reflected by the tobacco shreds through the optical filter, when the tobacco shreds of the cigarette are empty, the light emitted by the emitting diode 509 is elongated by the whole distance reflected by the tobacco shreds, the light received by the receiving diode 511 is weakened, the signal amplification board 505 and the modulation board 507 modulate and amplify the change of weak current, the detection sensitivity is improved, the detection resolution ratio in a common range is higher, the detection accuracy is higher, and the signal processing board 503 is mainly responsible for communicating with the controller through a serial port.
After the photoelectric acquisition module converts the tobacco shred hollow head depth information into voltage data, the system converts the voltage information into image gray scale by utilizing a photoelectric data image virtualization technology, the voltage of 0-5000 mV corresponds to the gray scale of 0-255, the detection is conveniently and directly carried out by adopting the existing machine vision software platform, finally, in the image processing process, the histogram statistics of the gray scale value is carried out in each cigarette interest area, the statistical characteristic is formed, and the maximum position of the gray scale value is the gray scale value of the cigarette.
As shown in the front view and the left side view of the controller in fig. 5, the controller is the core of the detection device and mainly comprises an industrial control board and a control board. The industrial control board is provided with a visual detection controller for operating the operating system and detecting software; the control panel is used for peripheral extension of an industrial control panel, and an Ethernet interface, a USB interface, a VGA interface and an IO signal interface are sequentially distributed from top to bottom, wherein the Ethernet interface 601 is used for detecting software and carrying out Ethernet communication with human-computer interface software, the USB interface 602 is mainly used for system software upgrading and peripheral access of a keyboard and a mouse, the VGA interface 603 is mainly used for VGA display of a controller, and the IO signal interface 604 is mainly used for power supply of the controller and interaction with a control system of a packaging unit. The controller controls the tobacco shred side photoelectric acquisition module, the tobacco shred side image acquisition module and the filter tip side image acquisition module to acquire data, and simultaneously performs data analysis and processing to judge whether defects exist at present. And when the unqualified cigarette packet is detected, sending an unqualified signal to the packaging unit control system, and rejecting the unqualified cigarette packet at a corresponding position by the packaging unit control system.
The human-computer interface consists of a touch display screen and shortcut keys, the touch display screen is arranged in the middle of the human-computer interface, and the shortcut keys are distributed on two sides from top to bottom. The touch display screen is a 10.4-inch color liquid crystal touch display screen, the resolution is 1024 x 768, a touch control function is provided for man-machine interaction operation, a user can check related information of system operation through the display screen, and related parameters of the system can be set through the touch screen. The shortcut keys on the two sides of the human-computer interface are used for shortcut keys with functions of power-off of the display screen, restarting of the human-computer interface and the like, and operation by a user is facilitated.
On the basis of the composite cigarette detection device for the FOCKE packaging machine, the invention provides a composite cigarette detection method for the FOCKE packaging machine, which mainly comprises the following steps as shown in figure 6:
step 1: after an input/output interface of the controller receives a trigger signal of a control system of the packing unit, a core control unit controls a tobacco shred side image acquisition module, a filter tip side image acquisition module and a tobacco shred side photoelectric acquisition module to respectively acquire an image of the end part of a tobacco shred, an image of the end part of a filter tip and a voltage of the end part of the tobacco shred and transmits data to a core processing module for image analysis;
step 2: sending a corresponding rejection signal and a diagnosis signal to a packaging unit control system through an input/output interface according to an image analysis result;
and 3, step 3: the controller is communicated with the human-computer interface through the Ethernet switch, acquires image and voltage data, and displays the processing effect on the human-computer interface in real time;
and 4, step 4: and an operator checks the relevant information of the system operation through a human-computer interface display screen and sets the relevant parameters of the system through a touch screen.
Wherein, the image analysis process in the step 1 comprises the processing of the cut tobacco end part image, the filter tip end part image and the cut tobacco end part voltage; the processing of the tobacco shred end image and the filter tip end image comprises the following steps:
step 1.1.1: preprocessing images of the tobacco shred and the filter tip end part, including filtering and denoising, brightness compensation correction and distortion correction;
step 1.1.2: setting an interest area (including a cigarette shaking range) larger than the diameter of each cigarette at each cigarette position;
step 1.1.3: accurately separating the current cigarettes in the interest area through a cigarette automatic positioning technology combining projection and distance transformation, and sequentially carrying out graying, binaryzation, corrosion, expansion, searching and drawing the outline of the tobacco shred or the filter tip;
step 1.1.4: calculating the outline area, namely the pixel number of the interest area, namely the pixel number of the target, and judging whether the defect of head vacancy or branch vacancy exists or not according to the pixel number;
the method comprises the following steps of:
step 1.2.1: performing voltage data image virtualization on the voltage of the end part of the tobacco shred, and converting the 0-5V voltage of the tobacco shred side of each cigarette into 0-255 gray values according to 256 gray levels;
step 1.2.2: drawing a circle with the same diameter as the cigarette at the position corresponding to the cigarette in the empty image, and filling the circle with the converted gray value;
step 1.2.3: according to an image processing method, performing gray image histogram statistics to obtain a gray value with the maximum pixel number, namely the gray value of the current cigarette, and judging whether the empty head defect exists or not according to the gray value.
The above is a complete implementation process of the embodiment.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A composite cigarette detection device for FOCKE packaging machine is composed of a tobacco shred side image acquisition module, a tobacco shred side photoelectric acquisition module, a filter tip side image acquisition module, a controller and a human-computer interface;
the controller comprises a core control unit, an image acquisition communication interface, a photoelectric acquisition communication interface, an input/output interface and an Ethernet communication interface;
the system is characterized in that two image acquisition communication interfaces in a controller are respectively connected with industrial cameras in a tobacco shred side image acquisition module and a filter tip side image acquisition module, a photoelectric acquisition communication interface is connected with a receiving diode in the tobacco shred side photoelectric acquisition module, the three interfaces are connected with a core control unit in the controller, the core control unit is also connected with an input/output interface, a core processing module and an Ethernet communication interface in the controller, the input/output interface is connected with a packaging unit control system, the Ethernet communication interface is connected with an Ethernet switch, and the Ethernet switch is connected with a human-computer interface;
on a double-channel FOCKE packaging machine, each side of a heptagon turret is provided with a die box, a tobacco shred side photoelectric acquisition module is arranged at an original mechanical contact sensor, penetrates through a tobacco shred baffle to push a cigarette to move along with a mechanical arm; the tobacco shred side image acquisition module and the filter tip side image acquisition module are respectively and statically fixed on a tobacco shred baffle and are aligned to a tobacco bale at the same station;
the cut tobacco side photoelectric acquisition module is arranged in the shell, the signal processing board, the signal amplifying board, the signal modulating board, the transmitting board and the receiving board are sequentially arranged and fixed through connectors between boards, wherein copper padding columns are welded between adjacent boards of the signal processing board, the signal amplifying board and the signal modulating board, the transmitting diode and the receiving diode are respectively welded on the transmitting board and the receiving board, the light guide column penetrates through the receiving board, one end of the light guide column is connected with the transmitting diode, and the other end of the light guide column is connected with the receiving diode; one end of the shell is provided with an 8-core interface, and the other end of the shell is provided with an optical filter; one transmitting tube corresponds to one light guide rod, and 4 receiving tubes are arranged around the light guide rod; embedding the transmitting tube into the inner cavity of a transmitting plastic partition plate, and placing the transmitting plastic partition plate between a transmitting plate and a receiving plate; the receiving pipe is embedded in the inner cavity of the receiving plastic partition plate, and the receiving plastic partition plate is placed between the receiving plate and the shell.
2. The composite cigarette detection device for the FOCKE packing machine as claimed in claim 1, wherein in the cut tobacco side image acquisition module, the end of the cut tobacco of a cigarette is positioned on the left side of the glass window, the plane mirror is laid below, the industrial camera and the plane mirror form a certain angle, and the LED light source illuminates the end of the cut tobacco of the cigarette along the photographing direction of the industrial camera.
3. The composite cigarette detection device for the FOCKE packaging machine as claimed in claim 1, wherein in the filter side image acquisition module, the end part of a cigarette filter is positioned on the left side of the glass window, the LED light source and the end part of the cigarette filter form a certain angle for illumination, and the industrial camera is installed perpendicular to the end face of the filter.
4. The composite cigarette detection device for the FOCKE packaging machine as claimed in claim 1, wherein the controller comprises an industrial control board and a control board, the industrial control board is provided with a visual detection controller, and the control board is sequentially distributed with an Ethernet interface, a USB interface, a VGA interface and an IO signal interface from top to bottom.
5. The composite cigarette detection device for the FOCKE packing machine as claimed in claim 1, wherein a touch display screen is arranged in the middle of the human-computer interface, and shortcut keys are distributed from top to bottom on two sides of the human-computer interface; the touch display screen is a 10.4-inch color liquid crystal touch display screen, and the resolution is 1024 x 768.
6. A composite cigarette detection method for a FOCKE packaging machine is characterized by comprising the following steps: the composite cigarette detection device for the FOCKE packaging machine, which is adopted by the claim 1, comprises the following steps:
step 1: after an input/output interface of the controller receives a trigger signal of a control system of the packing unit, the core control unit controls the tobacco shred side image acquisition module, the filter tip side image acquisition module and the tobacco shred side photoelectric acquisition module to respectively acquire an image of the end part of the tobacco shred, an image of the end part of the filter tip and a voltage of the end part of the tobacco shred and transmits data to the core processing module for image analysis;
and 2, step: sending a corresponding rejection signal and a diagnosis signal to a packaging unit control system through an input/output interface according to an image analysis result;
and step 3: the controller is communicated with the human-computer interface through the Ethernet switch, acquires image and voltage data, and displays the processing effect on the human-computer interface in real time;
and 4, step 4: and an operator checks the relevant information of the system operation through a human-computer interface display screen and sets the relevant parameters of the system through a touch screen.
7. The method for detecting the cigarettes in the FOCKE packaging machine in the compound mode as claimed in claim 6, wherein the method comprises the following steps: the image analysis process in the step 1 comprises the following steps of processing the cut tobacco end part image, the filter tip end part image and the cut tobacco end part voltage:
the processing of the tobacco shred end image and the filter tip end image comprises the following steps:
step 1.1.1: preprocessing images of the tobacco shred and the filter tip end part, including filtering and denoising, brightness compensation correction and distortion correction;
step 1.1.2: setting an interest area larger than the diameter of each cigarette at each cigarette position, and including the shaking range of the cigarettes;
step 1.1.3: accurately separating the current cigarettes in the interest area through a cigarette automatic positioning technology combining projection and distance transformation, and sequentially carrying out graying, binaryzation, corrosion, expansion, searching and drawing the outlines of the tobacco shreds and the filter tips;
step 1.1.4: calculating the outline area, namely the pixel number of the interest area, namely the pixel number of the target, and judging whether a blank head and a missing branch exist or not according to the pixel number;
the method comprises the following steps of:
step 1.2.1: performing voltage data image virtualization on the voltage of the end part of the tobacco shred, and converting the 0-5V voltage of the tobacco shred side of each cigarette into 0-255 gray values according to 256 gray levels;
step 1.2.2: drawing a circle with the same cigarette diameter at the position of the empty image corresponding to the cigarette, and filling the circle with the converted gray value;
step 1.2.3: according to an image processing method, performing gray image histogram statistics to obtain a gray value with the maximum pixel number, namely the gray value of the current cigarette, and judging whether the empty head defect exists or not according to the gray value.
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