阅读说明：本技术 一种烟支烟丝端面检测的控制方法及系统 (Control method and system for cigarette tobacco end face detection ) 是由 张能 白朝矗 侯志平 崔宇翔 华一崑 周茂忠 杨洋 林鸿佳 于 2021-08-26 设计创作，主要内容包括：本发明提供一种烟支烟丝端面检测的控制方法及系统,该方法包括：在检测鼓轮入口处设置光电开关以检测鼓轮上的烟支是否就位,并在检测鼓轮上的烟支就位时发送烟支到位信号；在剔除鼓轮入口后方处设置视觉检测装置,以对烟支的烟丝端面进行视觉检测,并在烟丝端面存在缺陷时发送缺陷信号；将轴编码器设置在检测鼓轮的转动轴上,以对检测鼓轮的转动进行定位检测,并在检测鼓轮每转过一个槽,所述轴编码器运转10°；在接收到所述烟支到位信号时,计算所述轴编码器的运转角度,并在所述运转角度与预定角度阈值相等时控制所述视觉检测装置对烟支烟丝端面进行视觉拍摄并缺陷识别。本发明能提高缺陷烟支检测的准确性,以提高卷烟产品质量。(The invention provides a control method and a system for detecting the end face of tobacco shreds of cigarettes, wherein the method comprises the following steps: a photoelectric switch is arranged at an inlet of the detection drum wheel to detect whether the cigarettes on the drum wheel are in place or not, and a cigarette in-place signal is sent when the cigarettes on the detection drum wheel are in place; a visual detection device is arranged behind the inlet of the eliminating drum wheel to visually detect the tobacco shred end surface of the cigarette and send a defect signal when the tobacco shred end surface has defects; arranging a shaft encoder on a rotating shaft of a detection drum wheel so as to carry out positioning detection on the rotation of the detection drum wheel, wherein the shaft encoder rotates for 10 degrees when the detection drum wheel rotates for one groove; and when the cigarette in-place signal is received, calculating the operation angle of the shaft encoder, and controlling the visual detection device to perform visual shooting and defect identification on the end face of the cut tobacco of the cigarette when the operation angle is equal to a preset angle threshold value. The invention can improve the accuracy of the detection of the defective cigarettes so as to improve the quality of cigarette products.)

1. A control method for detecting the end face of tobacco shreds of cigarettes is characterized by comprising the following steps:

a photoelectric switch is arranged at an inlet of the detection drum wheel to detect whether the cigarettes on the drum wheel are in place or not, and a cigarette in-place signal is sent when the cigarettes on the detection drum wheel are in place;

a visual detection device is arranged behind the inlet of the eliminating drum wheel to visually detect the tobacco shred end surface of the cigarette and send a defect signal when the tobacco shred end surface has defects;

arranging a shaft encoder on a rotating shaft of a detection drum wheel so as to carry out positioning detection on the rotation of the detection drum wheel, wherein the shaft encoder rotates for 10 degrees when the detection drum wheel rotates for one groove;

and when the cigarette in-place signal is received, calculating the operation angle of the shaft encoder, and controlling the visual detection device to perform visual shooting and defect identification on the end face of the cut tobacco of the cigarette when the operation angle is equal to a preset angle threshold value.

2. The control method for detecting the end face of the cut tobacco of the cigarette according to claim 1, further comprising the following steps:

and when the defect signal is received, controlling a removing device to remove cigarettes with defects when the operation angle of the shaft encoder reaches the preset angle threshold value.

3. The control method for detecting the end face of the cut tobacco of the cigarette according to claim 2, further comprising the following steps:

if the photoelectric switch arranged at the inlet of the detection drum detects cigarettes and the visual detection device arranged behind the inlet of the rejection drum continuously sets a plurality of grooves without detecting cigarettes, reporting the cigarette blockage alarm of the detection drum;

if the photoelectric switch is arranged at the inlet of the detection drum wheel and the cigarettes are not detected, and the visual detection device arranged at the inlet of the rejection drum wheel continuously sets a plurality of grooves to detect the cigarettes, the failure alarm of the photoelectric switch for cigarette detection is reported.

4. A control system for detecting the end face of tobacco shred of cigarette is characterized by comprising: the device comprises a controller, a shaft encoder, a photoelectric switch and a visual detection device;

the first input end of the controller is connected with the output end of the shaft encoder, the second input end of the controller is connected with the output end of the photoelectric switch, and the third input end of the controller is connected with the output end of the visual detection device;

the photoelectric switch is arranged at the inlet of the detection drum wheel and used for detecting the in-place of the cigarettes on the detection drum wheel and sending in-place signals of the cigarettes when the cigarettes on the detection drum wheel are in place;

the visual detection device is arranged at the rear part of the inlet of the eliminating drum wheel and is used for visually detecting the tobacco shred end surface of the cigarette and sending a defect signal when the tobacco shred end surface has defects;

the shaft encoder is arranged on a rotating shaft of the detection drum wheel and used for positioning and detecting the rotation of the detection drum wheel, and the shaft encoder operates for 10 degrees when the detection drum wheel rotates through one groove;

the controller is used for calculating the operation angle of the shaft encoder when the cigarette in-place signal is received, controlling the operation angle to be equal to a preset angle threshold value, and visually shooting and identifying defects of the cigarette and cut tobacco end face by the visual detection device.

5. The control system for detecting the end face of the cut tobacco of the cigarette according to claim 4, further comprising: a rejecting device;

the control end of the removing device is connected with the first output end of the controller, and the controller controls the removing device to remove cigarettes with defects according to the defect signals and the running angle of the shaft encoder.

6. The control system for detecting the end face of the cut tobacco of the cigarette according to claim 5, wherein the removing device comprises: an electromagnetic valve and a blowing device;

the blowing equipment is communicated with a compressed air source through a pipeline, the electromagnetic valve is arranged on the pipeline, and the control end of the electromagnetic valve is connected with the second output end of the controller;

the controller controls the electromagnetic valve to be opened according to the defect signal and the operation angle of the shaft encoder so as to conduct the compressed air source and the air supply pipeline of the air blowing equipment, and then the air blowing equipment blows and rejects cigarettes with defects.

7. The control system for detecting the end face of the cut tobacco of the cigarette according to claim 6, further comprising: an alarm device;

the alarm device is in signal connection with the controller, and the controller controls the alarm device to give an alarm when the controller detects that the drum wheel continuously rotates through the set groove number and does not receive the cigarette in-place signal.

8. The control system for tobacco shred end face detection according to claim 7, further comprising: touching a mould screen;

the controller with touch screen signal connection, the touch screen is used for showing in real time the visual image of cigarette pipe tobacco terminal surface that vision detection device gathered to and show alarm information.

9. The control system for detecting the end face of the cut tobacco of the cigarette according to claim 8, wherein the visual detection device comprises: the system comprises an intelligent camera, an image acquisition module and an image identification module;

the input end of the image acquisition module is connected with the output end of the intelligent camera, and the output end of the image acquisition module is connected with the input end of the image identification module;

the image acquisition module is used for acquiring the shot image of the intelligent camera;

the image recognition module is used for carrying out gray scale and brightness recognition on the shot image according to a preset tobacco shred end face image and judging whether the cigarette has the defects of loose tobacco shred end faces, loose ends and loose ends.

10. A control system for tobacco shred end face detection according to any one of claims 4 to 9, further comprising: an illumination light source;

the lighting source is in signal connection with the controller, and the controller is used for controlling the lighting source to be turned on when the vision detection device carries out vision shooting.

Technical Field

The invention relates to the technical field of cigarette quality detection, in particular to a control method and a system for cigarette tobacco shred end face detection.

Background

In the cigarette production, because the tobacco shred structure is different, the reduction disc grooves are different, the cigarette machine is filled with different materials, the cigarettes rotate on the drum wheel at high speed and other factors, the tobacco shred end surface of the filter tip cigarette is loose and sunken (called as a loose-end cigarette), the sunken 1/3 or 1mm of the loose-end cigarette reaching the end surface is the unqualified cigarette, therefore, in the cigarette production process, the unqualified cigarette must be effectively detected and accurately eliminated, so that the unqualified cigarette with loose ends is prevented from flowing into the next process. In addition, the tobacco shreds may protrude out of the end face of the cigarette, that is, the tobacco shreds are exposed (become cigarette butt), and in the subsequent packaging process, the cigarette butt is easily changed into empty cigarette butt or the tobacco shreds in the cigarette box are scattered, so that the experience of consumers is influenced. Therefore, how to effectively detect and remove the defective cigarettes so as to ensure the quality of cigarette products has important significance.

Disclosure of Invention

The invention provides a control method system for detecting the end face of tobacco shreds of cigarettes, which solves the problem that the detection of the defects of loose, loose and loose ends of the end face of the tobacco shreds of the cigarettes in the existing cigarette production process is inaccurate, and can improve the accuracy of the detection of the defective cigarettes and the quality of cigarette products.

In order to achieve the above purpose, the invention provides the following technical scheme:

a control method for detecting the end face of tobacco shreds of cigarettes comprises the following steps:

a photoelectric switch is arranged at an inlet of the detection drum wheel to detect whether the cigarettes on the drum wheel are in place or not, and a cigarette in-place signal is sent when the cigarettes on the detection drum wheel are in place;

a visual detection device is arranged behind the inlet of the eliminating drum wheel to visually detect the tobacco shred end surface of the cigarette and send a defect signal when the tobacco shred end surface has defects;

arranging a shaft encoder on a rotating shaft of a detection drum wheel so as to carry out positioning detection on the rotation of the detection drum wheel, wherein the shaft encoder rotates for 10 degrees when the detection drum wheel rotates for one groove;

and when the cigarette in-place signal is received, calculating the operation angle of the shaft encoder, and controlling the visual detection device to perform visual shooting and defect identification on the end face of the cut tobacco of the cigarette when the operation angle is equal to a preset angle threshold value.

Preferably, the method further comprises the following steps:

and when the defect signal is received, controlling a removing device to remove cigarettes with defects when the operation angle of the shaft encoder reaches the preset angle threshold value.

Preferably, the method further comprises the following steps:

if the photoelectric switch arranged at the inlet of the detection drum detects cigarettes and the visual detection device arranged behind the inlet of the rejection drum continuously sets a plurality of grooves without detecting cigarettes, reporting the cigarette blockage alarm of the detection drum;

if the photoelectric switch is arranged at the inlet of the detection drum wheel and the cigarettes are not detected, and the visual detection device arranged at the inlet of the rejection drum wheel continuously sets a plurality of grooves to detect the cigarettes, the failure alarm of the photoelectric switch for cigarette detection is reported.

The invention also provides a control system for detecting the end face of the cut tobacco of the cigarette, which comprises the following components: the device comprises a controller, a shaft encoder, a photoelectric switch and a visual detection device;

the first input end of the controller is connected with the output end of the shaft encoder, the second input end of the controller is connected with the output end of the photoelectric switch, and the third input end of the controller is connected with the output end of the visual detection device;

the photoelectric switch is arranged at the inlet of the detection drum wheel and used for detecting the in-place of the cigarettes on the detection drum wheel and sending in-place signals of the cigarettes when the cigarettes on the detection drum wheel are in place;

the visual detection device is arranged at the rear part of the inlet of the eliminating drum wheel and is used for visually detecting the tobacco shred end surface of the cigarette and sending a defect signal when the tobacco shred end surface has defects;

the shaft encoder is arranged on a rotating shaft of the detection drum wheel and used for positioning and detecting the rotation of the detection drum wheel, and the shaft encoder operates for 10 degrees when the detection drum wheel rotates through one groove;

the controller is used for calculating the operation angle of the shaft encoder when the cigarette in-place signal is received, controlling the operation angle to be equal to a preset angle threshold value, and visually shooting and identifying defects of the cigarette and cut tobacco end face by the visual detection device.

Preferably, the method further comprises the following steps: a rejecting device;

the control end of the removing device is connected with the first output end of the controller, and the controller controls the removing device to remove cigarettes with defects according to the defect signals and the running angle of the shaft encoder.

Preferably, the rejecting device comprises: an electromagnetic valve and a blowing device;

the blowing equipment is communicated with a compressed air source through a pipeline, the electromagnetic valve is arranged on the pipeline, and the control end of the electromagnetic valve is connected with the second output end of the controller;

the controller controls the electromagnetic valve to be opened according to the defect signal and the operation angle of the shaft encoder so as to conduct the compressed air source and the air supply pipeline of the air blowing equipment, and then the air blowing equipment blows and rejects cigarettes with defects.

Preferably, the method further comprises the following steps: an alarm device;

the alarm device is in signal connection with the controller, and the controller controls the alarm device to give an alarm when the controller detects that the drum wheel continuously rotates through the set groove number and does not receive the cigarette in-place signal.

Preferably, the method further comprises the following steps: touching a mould screen;

the controller with touch screen signal connection, the touch screen is used for showing in real time the visual image of cigarette pipe tobacco terminal surface that vision detection device gathered to and show alarm information.

Preferably, the visual inspection device includes: the system comprises an intelligent camera, an image acquisition module and an image identification module;

the input end of the image acquisition module is connected with the output end of the intelligent camera, and the output end of the image acquisition module is connected with the input end of the image identification module;

the image acquisition module is used for acquiring the shot image of the intelligent camera;

the image recognition module is used for carrying out gray scale and brightness recognition on the shot image according to a preset tobacco shred end face image and judging whether the cigarette has the defects of loose tobacco shred end faces, loose ends and loose ends.

Preferably, the method further comprises the following steps: an illumination light source;

the lighting source is in signal connection with the controller, and the controller is used for controlling the lighting source to be turned on when the vision detection device carries out vision shooting.

The invention provides a control method and a system for detecting the end face of tobacco shreds of cigarettes, which adopt a photoelectric switch to detect the cigarettes for in-place detection, a shaft encoder is used for positioning detection of a detection drum wheel, and a controller controls a visual detection device to perform visual detection on the end face of the tobacco shreds according to an in-place signal of the photoelectric switch and the operation angle of the shaft encoder so as to identify whether the defects exist. The method solves the problem of inaccurate detection of the defects of loose tobacco, loose tobacco and loose tobacco end faces in the existing cigarette production process, can improve the accuracy of detection of defective cigarettes, and improves the quality of cigarette products.

Drawings

In order to more clearly describe the specific embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below.

FIG. 1 is a schematic diagram of a control method for detecting an end face of tobacco shreds of a cigarette provided by the invention.

Fig. 2 is a flowchart of tobacco shred end surface detection provided by the embodiment of the present invention.

FIG. 3 is a schematic view of a control system for detecting the end face of tobacco shred in cigarette according to the present invention.

Fig. 4 is a schematic diagram of a cut tobacco end face detection structure provided by the invention.

Detailed Description

In order to make the technical field of the invention better understand the scheme of the embodiment of the invention, the embodiment of the invention is further described in detail with reference to the drawings and the implementation mode.

The method aims at solving the problem that the defect detection of the end face of the cut tobacco of the cigarette in the current cigarette production is inaccurate. The invention provides a control method and a system for detecting the end face of tobacco shreds of cigarettes, which adopt a photoelectric switch to detect the cigarettes for in-place detection, a shaft encoder is used for positioning detection of a detection drum wheel, and a controller controls a visual detection device to perform visual detection on the end face of the tobacco shreds according to an in-place signal of the photoelectric switch and the operation angle of the shaft encoder so as to identify whether the defects exist. The method solves the problem of inaccurate detection of the defects of loose tobacco, loose tobacco and loose tobacco end faces in the existing cigarette production process, can improve the accuracy of detection of defective cigarettes, and improves the quality of cigarette products.

As shown in fig. 1, a control method for detecting the end face of tobacco shred in cigarette includes:

s1: a photoelectric switch is arranged at an inlet of the detection drum wheel to detect whether the cigarettes on the drum wheel are in place or not, and a cigarette in-place signal is sent when the cigarettes on the detection drum wheel are in place;

s2: a visual detection device is arranged behind the inlet of the eliminating drum wheel to visually detect the tobacco shred end surface of the cigarette and send a defect signal when the tobacco shred end surface has defects;

s3: arranging a shaft encoder on a rotating shaft of a detection drum wheel so as to carry out positioning detection on the rotation of the detection drum wheel, wherein the shaft encoder rotates for 10 degrees when the detection drum wheel rotates for one groove;

s4: and when the cigarette in-place signal is received, calculating the operation angle of the shaft encoder, and controlling the visual detection device to perform visual shooting and defect identification on the end face of the cut tobacco of the cigarette when the operation angle is equal to a preset angle threshold value.

Specifically, after the photoelectric switch detects that the cigarette on the detection drum wheel is in place, the photoelectric switch sends a placing signal to the controller, the rotation of the drum wheel is detected at the same time, the operation angle of the shaft encoder changes, and the shaft encoder operates by 10 degrees when the detection drum wheel rotates by one groove. When the rotation angle of the shaft encoder is equal to the preset angle threshold value, the controller judges that the detected cigarette rotates to the set position, at the moment, the controller controls the visual detection device to perform visual detection on the tobacco shred end face of the cigarette so as to identify whether the tobacco shred end face has the defects of loose tobacco, loose tobacco and loose tobacco, and send a defect signal to the controller when the tobacco shred end face has the defects. The method can solve the problem that the detection of the defects of loose, loose and loose ends on the end face of the cut tobacco of the cigarette is inaccurate in the existing cigarette production process, can improve the accuracy of the detection of the defective cigarette, and can improve the quality of cigarette products.

Further, the method also includes:

s5: and when the defect signal is received, controlling a removing device to remove cigarettes with defects when the operation angle of the shaft encoder reaches the preset angle threshold value.

Further, the method also includes:

s6: if the photoelectric switch is arranged at the inlet of the detection drum wheel, the photoelectric switch detects cigarettes, and the visual detection device arranged at the rear of the rejected drum wheel inlet continuously sets a plurality of grooves without detecting the cigarettes, so that the alarm of cigarette blockage of the detection drum wheel is reported.

S7: if the photoelectric switch is arranged at the inlet of the detection drum wheel and the cigarettes are not detected, and the visual detection device arranged at the inlet of the rejection drum wheel continuously sets a plurality of grooves to detect the cigarettes, the failure alarm of the photoelectric switch for cigarette detection is reported.

In practical application, the controller can adopt a PLC (programmable logic controller), as shown in figure 2, a ZJ17 cigarette making machine set is powered on, the detection device operates, when the equipment normally operates, a wrapped filter cigarette reaches an inlet of a detection drum wheel, the filter cigarette is detected by detecting the existence of the cigarette above the detection drum wheel, the high level of the cigarette is sent to the PLC controller of an original machine, the phase angle of a shaft encoder is sent to the PLC controller, the PLC controller shifts 200-degree phase of the cigarette (namely, 20-slot cigarette), when the filter cigarette reaches an inlet of a rejection drum wheel, the PLC controller outputs a triggering photographing signal, a miniature intelligent camera arranged at the position immediately detects the tobacco end face of the cigarette at the slot position, the photographing signal is from the phase signal sent to the PLC by the shaft encoder, a photographed tobacco end face picture is processed by the intelligent camera and is compared with set parameters (gray scale, brightness, edge and the like), Outputting high and low levels to a PLC controller, setting the tobacco shred end face not meeting the grade to be high level, setting the normal cigarette to be low level, if the tobacco shred end face not meeting the grade setting requirement, rejecting the defective cigarette on a rejection drum after shifting, if a photoelectric switch arranged above the inlet of the detection drum detects the filter tip cigarette, and the tobacco shred end face arranged behind the inlet of the rejection drum detects no cigarette in 10 continuous grooves of the photoelectric switch, then the PLC immediately sends a stop signal, and reports red information of 'detecting the blockage of the drum cigarette'. If the photoelectric switch installed above the detection drum wheel inlet does not detect the filter tip cigarette, and the cut tobacco end face installed behind the rejection drum wheel inlet detects the filter tip cigarette by detecting the continuous 10 grooves of the photoelectric switch, the PLC immediately sends out a stop signal, and reports the red information of 'cigarette detection photoelectric switch failure'.

The invention provides a control method for detecting the end face of tobacco shreds of cigarettes, which is characterized in that a photoelectric switch is adopted to detect the cigarettes to be in place, a shaft encoder is used for carrying out positioning detection on a detection drum wheel, and a controller controls a visual detection device to carry out visual detection on the end face of the tobacco shreds according to an in-place signal of the photoelectric switch and the operation angle of the shaft encoder so as to identify whether the end face of the tobacco shreds is defective or not. The method solves the problem of inaccurate detection of the defects of loose tobacco, loose tobacco and loose tobacco end faces in the existing cigarette production process, can improve the accuracy of detection of defective cigarettes, and improves the quality of cigarette products.

As shown in fig. 3 and 4, a control system for detecting the end face of tobacco shred of cigarette includes: the device comprises a controller, a shaft encoder, a photoelectric switch and a visual detection device. The first input end of the controller is connected with the output end of the shaft encoder, the second input end of the controller is connected with the output end of the photoelectric switch, and the third input end of the controller is connected with the output end of the visual detection device. Photoelectric switch sets up at detection drum wheel entrance for a cigarette that detects on the drum wheel takes one's place to detect, and send a cigarette signal that targets in place when a cigarette that detects on the drum wheel takes one's place. The visual detection device is arranged at the rear part of the inlet of the rejection drum wheel and used for visually detecting the tobacco shred end face of the cigarette and sending a defect signal when the tobacco shred end face has defects. The shaft encoder is arranged on the rotating shaft of the detection drum wheel and used for positioning and detecting the rotation of the detection drum wheel, and the shaft encoder runs for 10 degrees when the detection drum wheel rotates through one groove. The controller is used for calculating the operation angle of the shaft encoder when the cigarette in-place signal is received, controlling the operation angle to be equal to a preset angle threshold value, and visually shooting and identifying defects of the cigarette and cut tobacco end face by the visual detection device.

Specifically, cigarette equipment starts, and the filter tip cigarette that the parcel was accomplished reachs and detects the drum entry, installs the photoelectric switch who detects drum entry top and detects the filter tip cigarette, and its signal sends into the controller. When the filter tip cigarette reaches the rejecting drum wheel inlet, the tobacco shred end face visual detection device arranged behind the rejecting drum wheel inlet detects the tobacco shred end face of the filter tip cigarette reaching the place. If this photoelectric switch does not detect a cigarette, then judge that this trench does not have a cigarette, the controller is not made visual detection device does not shoot photoelectric switch detects when a cigarette, gives the controller with a cigarette signal transmission that targets in place, and controller control removing devices rejects this trench cigarette. The axle encoder is used for two location detection that detect photoelectric switch, during the installation, will detect "0" bit line on the drum and the alignment of "0" bit line of base department, every groove that removes of cigarette, axle encoder operation 10, it detects filter tip cigarette and vision detection device and detects 20 slots on the cigarette totality to detect photoelectric switch and detect cigarette, when photoelectric switch detects cigarette and exists, the angle of operation of axle encoder is at "0", and when the angle of operation is "200", vision detection device could detect cigarette, every interval 10 controllers send into to vision detection device and trigger the signal of shooing, detect with the cigarette pipe tobacco terminal surface of shooing, handle, thereby accomplish the detection and the accurate rejection of whole cigarette filter tip terminal surface, stop that the defective products flow in next process. The method can solve the problem of inaccurate detection of the defects of loose tobacco, loose tobacco and loose end on the end face of the cut tobacco of the cigarette in the existing cigarette production process, can improve the accuracy of detection of the defective cigarette, and improves the quality of cigarette products.

The system further comprises: a rejecting device; the control end of the removing device is connected with the first output end of the controller, and the controller controls the removing device to remove cigarettes with defects according to the defect signals and the running angle of the shaft encoder.

Further, the rejecting device comprises: an electromagnetic valve and a blowing device; the blowing equipment is communicated with a compressed air source through a pipeline, the electromagnetic valve is arranged on the pipeline, and the control end of the electromagnetic valve is connected with the second output end of the controller. The controller controls the electromagnetic valve to be opened according to the defect signal and the operation angle of the shaft encoder so as to conduct the compressed air source and the air supply pipeline of the air blowing equipment, and then the air blowing equipment blows and rejects cigarettes with defects.

As shown in fig. 3, the system further includes: an illumination source. The lighting source is in signal connection with the controller, and the controller is used for controlling the lighting source to be turned on when the vision detection device carries out vision shooting.

The system further comprises: an alarm device; the alarm device is in signal connection with the controller, and the controller controls the alarm device to give an alarm when the controller detects that the drum wheel continuously rotates through the set groove number and does not receive the cigarette in-place signal.

Further, the alarm device at least comprises any one of the following components: pilot lamp, buzzer and audible-visual annunciator.

The system further comprises: touching a mould screen; the controller with touch screen signal connection, the touch screen is used for showing in real time the visual image of cigarette pipe tobacco terminal surface that vision detection device gathered to and show alarm information.

In practical application, if the photoelectric switch does not detect cigarettes in 10 continuous slots, the controller immediately reports a stop signal and reports red information of 'detecting the cigarette blockage of a drum', and similarly, if the photoelectric switch arranged above the inlet of the detecting drum does not detect the cigarettes of a filter tip, and the photoelectric switch arranged behind the inlet of the rejecting drum detects the cigarettes of the filter tip in 10 continuous slots, the controller immediately sends the stop signal and reports the red information of 'detecting the photoelectric switch failure of the cigarette'.

The visual inspection device includes: the device comprises an intelligent camera, an image acquisition module and an image identification module. The input end of the image acquisition module is connected with the output end of the intelligent camera, and the output end of the image acquisition module is connected with the input end of the image identification module. The image acquisition module is used for acquiring the shot image of the intelligent camera. The image recognition module is used for carrying out gray scale and brightness recognition on the shot image according to a preset tobacco shred end face image and judging whether the cigarette has the defects of loose tobacco shred end faces, loose ends and loose ends.

Furthermore, 2 intelligent cameras are arranged at the center positions of 15-degree included angles aligned with the end faces of the tobacco shreds of the cigarettes.

Further, the controller is a PLC controller or a microprocessor.

In practical application, as shown in fig. 4, the photoelectric switch 4 is installed above the inlet of the detection drum 2 through the mounting bracket, the intelligent camera 6 for cigarette end surface detection is installed at the rear position of the inlet of the rejection drum 1 through the mounting bracket, the electromagnetic valve is installed at the position of the 8 o' clock direction of the rejection drum, the unqualified cigarettes are blown out from the rejection drum by adopting the blowing equipment, the photoelectric switch for cigarette existence detection and the output end of the miniature intelligent camera are connected to the input end of the controller, the electromagnetic valve is connected to the output end of the controller, and the DC24V DC power supply is adopted from the electric cabinet of the cigarette making machine. When the equipment normally operates, the filter tip cigarette 3 formed by wrapping reaches the inlet of the detection drum wheel from the turning drum wheel 5, a phase signal of a shaft encoder is sent to the controller, the cigarette above the detection drum wheel detects the filter tip cigarette, the high level of the cigarette is sent to the controller, the controller shifts the cigarette and shifts 20-groove cigarette (200 degrees phase), when the filter tip cigarette reaches the inlet of the rejection drum wheel, the controller immediately outputs a signal to trigger the intelligent camera, the miniature intelligent camera arranged at the position immediately takes a picture of the end face of the tobacco shred of the groove position, the grey level and the brightness of the picture exceed the set value after the picture is processed and compared, the cigarette does not meet the process requirements, the intelligent camera outputs 24V high level to the rejection controller, the rejected cigarette is rejected on the drum wheel after the controller is shifted, otherwise, the intelligent camera outputs a low level signal to the controller, the controller does not output, and the cigarette reaches the next process from the output drum. If the photoelectric switch arranged above the detection drum wheel inlet detects that the filter tip cigarette is stuck, and the intelligent camera arranged in front of the rejection drum wheel inlet does not detect the filter tip cigarette in 10 continuous grooves, the controller immediately sends out a stop signal and reports red information of 'detection drum wheel cigarette blockage'. If the photoelectric switch installed above the detection drum wheel inlet does not detect the filter tip cigarette, and the intelligent camera installed in front of the rejection drum wheel inlet detects the filter tip cigarette in 10 continuous grooves, the controller immediately sends out a stop signal, and reports red information of 'cigarette detection photoelectric switch failure'.

The invention provides a control system for detecting the end faces of tobacco shreds of cigarettes, which detects the cigarettes in place by adopting a photoelectric switch, performs positioning detection on a detection drum wheel by a shaft encoder, and controls a visual detection device to perform visual detection on the end faces of the tobacco shreds by a controller according to an in-place signal of the photoelectric switch and the operation angle of the shaft encoder so as to identify whether the end faces are defective or not. The method solves the problem of inaccurate detection of the defects of loose tobacco, loose tobacco and loose tobacco end faces in the existing cigarette production process, can improve the accuracy of detection of defective cigarettes, and improves the quality of cigarette products.

The construction, features and functions of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the embodiments shown in the drawings, and all equivalent embodiments modified or modified by the spirit and scope of the present invention should be protected without departing from the spirit of the present invention.