CN114802977A - Cigarette packet quality detection method and side-opening carton filling equipment - Google Patents
Cigarette packet quality detection method and side-opening carton filling equipment Download PDFInfo
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- CN114802977A CN114802977A CN202210638750.6A CN202210638750A CN114802977A CN 114802977 A CN114802977 A CN 114802977A CN 202210638750 A CN202210638750 A CN 202210638750A CN 114802977 A CN114802977 A CN 114802977A
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- distance
- signal
- cigarette packet
- detection element
- cigarette
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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
- B65B57/00—Automatic control, checking, warning, or safety devices
- B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
- B65B57/12—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
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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
- B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
- B65B35/30—Arranging and feeding articles in groups
- B65B35/44—Arranging and feeding articles in groups by endless belts or chains
Abstract
The invention relates to a cigarette packet quality detection method and a side-opening carton filling device, wherein the carton filling device comprises a conveying belt and a detection element, the conveying belt is used for periodically conveying cartons, at least two cigarette packets are accommodated in the cartons along the feeding direction, the detection element is fixed above the conveying belt, and the detection element acquires a distance signal which is the distance from the detection element to the surfaces of the cigarette packets; the method comprises the following steps: obtaining a plurality of distance signals, wherein the distance signals are the distances between the detection element and the surfaces of the cigarette packets in the carton in sequence; the encoder outputs an encoding signal, and determines the feeding period of the conveying belt according to the encoding signal; the encoder is arranged on a driving element or a transmission element of the transmission belt; judging whether the distance signal is an abnormal signal; and when the distance signal is an abnormal signal, determining that the cigarette packet in the carton has defects. The workpiece is detected in real time through the detection element, so that the detection precision is improved, the product quality is ensured, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of automatic assembly, in particular to a cigarette packet quality detection method and side-opening carton filling equipment.
Background
At the end of cigarette production, the produced cigarette packets need to be packed. But during use in existing packaging equipment.
The inventor finds that quality problems occur in the cigarette packets during packaging, such as pack shortage when the cigarette packets are assembled into a carton, and deformation of part of the cigarette packets in the cigarette packet group caused by extrusion of the cigarette packet group during grabbing or transportation, which are troubling for cigarette automatic production.
The quality problems of the cigarette packets are accidental in production, detection is carried out in a self-checking or sampling-checking mode by a user, the detection accuracy is low, and the quality problems are difficult to accurately and completely eliminate; secondly, waste time and labor and waste labor cost, and the disassembled strip box needs to be packaged again after the self-inspection or the spot inspection is finished.
Disclosure of Invention
In view of the above, it is necessary to provide a method for detecting the quality of cigarette packets, which solves the problem of high cost of processing quality cigarette packets.
In a first aspect, the present application provides a method for detecting the quality of cigarette packets, the method is applied to a carton filling device, the carton filling device includes a conveyor belt and a detection element, the conveyor belt is used for periodically conveying a carton, an encoder is arranged on a driving element or a transmission element of the conveyor belt, at least two cigarette packets are accommodated in the carton along a feeding direction, the detection element is fixed above the conveyor belt, the detection element obtains a distance signal, and the distance signal is the distance from the detection element to the surface of the cigarette packet;
the method comprises the following steps:
acquiring a plurality of distance signals, wherein the distance signals are the distances between the detection elements and the surfaces of all the cigarette packets in the carton in sequence;
determining the feeding period of the conveying belt according to the coding signal of the coder;
judging whether the cigarette packet in the same box has defects or not according to the distance signal and the coding signal; and judging whether the distance signal is an abnormal signal or not, and determining that the cigarette packet in the carton has defects when the distance signal is the abnormal signal.
According to the technical scheme of the embodiment of the application, the distance signals acquired by the detection element calculate the tobacco bale surface parameters so as to judge whether the tobacco bale quality is qualified. The real-time detection of the cigarette packet filling production operation is realized through a simple structure. The product quality is improved and the structure is simple and stable.
In one embodiment, the rotating shaft of the encoder is connected with the shaft center of a belt wheel of the conveying belt, and the determining of the feeding period of the conveying belt according to the encoding signal comprises the following steps:
acquiring a coding signal output by a coder every time the rotating shaft rotates for 360 degrees/n;
in the process of rotating the rotating shaft by 360 degrees, obtaining coded signals and sequentially marking the coded signals as positive integers from 1 to n;
when two consecutive standard sequences of the coded signal are the same, determining that the transmission belt transmits a feeding period.
In one embodiment, limit teeth are uniformly distributed on a belt of the conveying belt along the feeding direction, and the feeding period is as follows:
the process of the upstream spacing tooth moving to the position where the adjacent downstream spacing tooth was previously located.
In one embodiment, the packet of cigarettes within the carton is defective including missing and/or deformed.
In one embodiment, the determining whether the distance signal is an abnormal signal includes: when the distance between the detection element and the cigarette packet surface is not within the distance range between the detection element and the normal cigarette packet, the distance signal is judged to be a first abnormal signal;
when the distance signal is an abnormal signal, determining that the cigarette packet in the carton has defects, comprising the following steps: and when the distance signal is the first abnormal signal, determining that the cigarette packet has the defect of missing the cigarette packet.
In one embodiment, when the distance between the detection element and the cigarette packet surface is not within the distance range between the detection element and the normal cigarette packet, the distance signal is determined to be a first abnormal signal, and the method comprises the following steps:
the method comprises the steps of obtaining at least two distance signals on the surface of a cigarette packet, calculating the average distance between a detection element and the surface of the cigarette packet according to the distance signals obtained on the surface of the same cigarette packet, and judging that the distance signals are first abnormal signals if the average distance is larger than the maximum allowable deviation value of the distance between the detection element and the cigarette packet.
In one embodiment, the determining whether the distance signal is an abnormal signal includes: at least two distance signals are obtained on the surface of a cigarette packet, and when the fluctuation of the distance signals on the same cigarette packet is larger than the maximum value of the allowable fluctuation range of the distance between the detection element and the cigarette packet, the distance signals are judged to be second abnormal signals;
when the distance signal is an abnormal signal, determining that the cigarette packet in the carton has defects, comprising the following steps: when the distance signal is judged to be the second abnormal signal, the cigarette packet in the carton has the defect of deformation.
In one embodiment, acquiring at least two distance signals on the surface of a cigarette packet, and when the fluctuation of the distance signals on the same cigarette packet is greater than the maximum value of the allowable fluctuation range of the distance between the detection element and the cigarette packet, determining that the distance signals are second abnormal signals comprises:
calculating a standard deviation according to the distance signals acquired on the same cigarette packet;
the maximum value of the allowable fluctuation amplitude of the distance between the detection element and the cigarette packet comprises a predetermined standard deviation of the deformation of the cigarette packet.
In one embodiment, the carton filling apparatus comprises a recycling module for rejecting cartons having defective tobacco packets, the method further comprising: determining that the cigarette packet in the carton has defects;
and according to the abnormal signal of the coding signal, the recovery module rejects the carton of the cigarette packet with the corresponding defect.
In a second aspect, the present application provides a side-opening cartridge filling device, including a distance signal acquisition module, a code signal acquisition module, and a detection module;
the distance signal acquisition module is used for acquiring a distance signal on the detection element, the distance signal is the distance from the detection element to the surface of the cigarette packet, and the detection element is fixed above the conveying belt;
the coding signal acquisition module is used for acquiring a coding signal sent by the encoder and determining a feeding period according to the coding signal;
and the detection module is used for judging whether the cigarette packet in the carton has defects or not according to the distance signal and the coding signal.
In the technical scheme of this application embodiment, detecting element fixes in the top of transmission band, carries out real-time detection to the work piece that flows through the transmission band to in the defect of tobacco bale in the carton is detected out accurately, improve detection efficiency, thereby guaranteeing the yields, and promote automatic level, improve work efficiency.
Drawings
Fig. 1 is a schematic view of an overall structure of a barrel filling apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a conveyor belt of the cartridge loading apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an encoder according to an embodiment of the present invention;
fig. 4 is a schematic view of a normal cigarette packet in a carton according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a pack missing in a barrel according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating deformation of cigarette packets in a carton according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating a front edge of a first cigarette packet detected by a detecting element according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating a detection element detecting a rear edge of a first cigarette packet according to an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a detection element detecting a trailing edge of a tenth cigarette packet according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a detecting element for detecting a packet missing position according to an embodiment of the present invention.
Fig. 11 is a schematic view of a detection element for detecting the front edge of a deformed cigarette packet according to an embodiment of the present invention;
fig. 12 is a schematic view illustrating a detection element detecting a rear edge of a deformed cigarette packet according to an embodiment of the present invention;
fig. 13 is a schematic flow chart of a cigarette packet detection method according to an embodiment of the present invention.
Reference numerals:
100. a workpiece;
11. a barrel; 12. a group of packets;
121. cigarette packets; 122. a vacancy; 123. deforming the cigarette packet;
200. a conveyor belt;
21. a pulley; 22. limiting teeth; 23. a belt; 24. an encoder;
241. an encoder body; 242. a rotating shaft; 243. a signal terminal;
300. a detection element.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
For convenience of description, the following examples will be described by taking a film sticking device as an example in an embodiment of the present application.
Referring to fig. 1, fig. 1 is a schematic structural view of a carton packing apparatus according to some embodiments of the present application. The side-opening carton filling apparatus comprising: the conveying belt 200 is provided with at least a filling station, a detection station and a rejection station in sequence along the feeding direction of the conveying belt 200; the detection element 300 is fixedly arranged corresponding to the detection station; wherein, a cigarette packet group 12 is loaded into the bar box 11 at a loading station to form a workpiece 100, the cigarette packet group 12 comprises at least two cigarette packets 121, and the cigarette packets 111 contained in the bar box 11 are distributed along the feeding direction of the conveying belt 200; the workpiece 100 passes through the detection station along with the conveyor belt 200, and the detection element sequentially detects each cigarette packet 121 in the barrel 11; the workpieces 100 detected by the detection elements 300 as being of unacceptable quality for the packets 121 of cigarettes are moved out of the conveyor belt 200 at a rejection station.
The positions of the filling station, the detecting station and the removing station on the conveying belt 200 are provided with corresponding functional elements, and the functional elements are used for completing filling or detecting or removing work. The functional element disposed at the inspection station is an inspection element 300. The detecting element 300 is fixedly arranged corresponding to the detecting station, the detecting element 300 is relatively fixed, and the conveying belt 200 drives the workpiece 100 to pass through the lower part of the detecting element 300. In this embodiment, the detecting direction of the detecting element 300 is a vertical direction, and the detecting element 300 detects vertically downward. The arrangement direction of the cigarette packets 121 is parallel to the feeding direction. When the workpieces 100 are conveyed on the conveyor belt 200, the same positions of the cigarette packets 121 pass through the detection positions of the detection elements 300 one by one.
The carton filling equipment is provided with the detection element 300, the cigarette packets 121 in the workpieces 100 are detected one by the detection element 300, the quality of the cigarette packets 121 is detected according to the detection element 300, so that the workpieces 100 with problems are removed in subsequent removing stations, the workpieces 100 are detected automatically, and the workpieces 100 flowing through are detected in real time by the detection element 300, so that the carton filling equipment is high in accuracy, and the workpieces 100 with unqualified quality are prevented from flowing in an automatic production line. The quality of the produced product of the carton filling equipment is improved, and the consumer is prevented from obtaining defective products.
Referring to fig. 2, fig. 2 is a schematic view of a structure of a transfer belt in a carton packing device according to some embodiments of the present application. The transmission belt 200 comprises a belt 23 and two pulleys 21 for tensioning the belt 23, wherein one pulley 21 is driven by a drive element to move the belt 23.
The workpiece 100 is placed on the belt 23 and the pulley 21 is rotated by the driving element to move the belt 23, and the workpiece 100 placed on the belt 23 is moved in the feeding direction along with the belt 23. When the driving element drives one of the pulleys 21 to rotate clockwise, the belt 23 drives the workpiece 100 to move forward in the feeding direction.
The belt 23 is annular, and the two belt wheels 21 tension the belt 23, so that the friction force between the belt 23 and the belt wheels 21 is increased, the belt 23 is driven by the belt wheels 21 to move, and the phenomenon of slipping is avoided.
According to some embodiments of the present application, as shown in fig. 2, the belt 23 is provided with at least two raised position-limiting teeth 22, and the position-limiting teeth 22 are uniformly spaced along the feeding direction. The barrel 11 is placed between two adjacent limiting teeth 22, and two corresponding side surfaces of the barrel 11 abut against the adjacent limiting teeth 22.
In this solution, the stop teeth 22 are uniformly distributed on the belt 23, the gaps between adjacent stop teeth 22 being the same, the gaps being able to house the barrel 11. The gap between adjacent limit teeth 22 is slightly larger than or approximately equal to the length of the barrel 11, so that the barrel 11 can be stably placed in the gap, and the deformation of the shape of the barrel 11 caused by the compression of the limit teeth 22 is avoided. On the other hand, the process of the belt 23 moving the two adjacent limit teeth 22 on the belt 23 to the position of the current adjacent next limit tooth 22 from the upstream limit tooth 22 is one cycle C of the belt 23. The workpiece 100 may complete one process in one cycle C; specifically, during one cycle C, the inspection element 300 performs an inspection operation on one workpiece 100.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an encoder according to some embodiments of the present application. The drive element is provided with an encoder 24, which encoder 24 is intended to encode the points of the cartridge 11 which are limited between the limit teeth 22.
The shaft encoder 24 is connected to the driving element or the transmission element, the shaft encoder 24 includes a shaft encoder body 241, a rotation shaft 242, and a signal end 243, and the rotation shaft 242 and the signal end 243 are disposed on both sides of the shaft encoder body 241.
The position of the belt 23 in one period C is in one-to-one correspondence through the encoder 24, so that the position on the corresponding belt 23 is obtained according to the signal on the encoder 3, and the positioning of the designated position on the belt 23 is realized.
According to some embodiments of the present application, the detection element 300 comprises a single laser displacement sensor. The distance from the laser displacement sensor to the upper surface of the cigarette packet 121 is detected by the laser displacement sensor.
In the scheme, a laser displacement sensor is fixed above a channel of the conveying belt 200, light beams of the detector vertically irradiate downwards, the laser displacement sensor scans cigarette packets 121 in the cigarette packet group 12 one by one along with the workpiece 100 passing below the laser displacement sensor, and signals of the laser displacement sensor are input into the controller. Specifically, the controller for inputting the signal of the laser displacement sensor is the same as the controller for accessing the signal of the encoder 3 in the previous embodiment. Furthermore, the signal of the laser displacement sensor may directly correspond to the signal of the encoder 3.
Although not shown in the drawings, it is understood that the detecting element 300 includes, but is not limited to, a laser displacement sensor, and a digital photo detector may be selected. The number of the detection elements 300 can also be at least two, and the detection elements 300 are arranged along the vertical direction and the feeding direction, so that the detection on multiple positions on the cigarette packets 121 is facilitated, and the problem of local defects of some cigarette packets 121 is facilitated to be detected. The above detailed description should also be considered as specific examples of the present application.
In the present embodiment, the side-opening barrel filling apparatus is operated intermittently, that is, the belt 23 is not continuously rotated in each cycle, but is stopped in some phase intervals, for example, in 1 ° to 300 ° while being rotated in some phase intervals, and the rest of the phase intervals are stopped, when the belt 23 is in the stopped position, the belt is divided into 8 stations, and each station has a corresponding mechanical component (solenoid valve, etc.) to complete the corresponding packaging process:
station 1: the empty cartridge 11 with the cover covered is pushed into the timing belt 1;
and a station 2: the lid of the empty barrel 11 is partially opened;
and a station 3: the lid of the empty barrel 11 is fully opened;
station 4 (filling station): a cigarette packet group 12 of ten cigarette packets 121 is pushed into carton 11;
and a station 5: the cover of the barrel 11 is partially closed;
and 6, a station: the lid of the barrel 11 is fully closed;
and a station 7: the barrel 11 is labeled;
station 8 (reject station): the defective barrel 11 is rejected.
Since the laser displacement sensor needs to complete the detection of all cigarette packets 121 during the movement of the carton 11, the detection station is arranged between the station 4 and the station 5.
The filling process of the tobacco bale is automatically realized in the side-opening carton filling equipment, the quality of the tobacco bale is detected through the laser displacement sensor, the workpieces 100 with quality defects can be automatically removed, the product quality is ensured, and meanwhile, the production efficiency is improved.
According to some embodiments of the present application, referring to fig. 13, fig. 13 is a simplified flow chart of a cigarette packet detection method provided in some embodiments of the present application. The application also provides a cigarette packet quality detection method, which is applied to the carton 11 filling equipment in the embodiment; the method comprises the following steps:
s11, obtaining a plurality of distance signals by the detecting element 300, where the distance signals are distances between the detecting element 300 and the surfaces of the cigarette packets 121 in the carton 11 in sequence;
s12, the encoder 24 outputs an encoding signal, and the feeding period of the conveyor belt 200 is determined according to the encoding signal; wherein, the encoder 24 is arranged on a driving element or a transmission element of the transmission belt 200;
s12, judging whether the cigarette packet 121 in the same carton 11 has defects or not according to the distance signal and the coding signal; judging whether the distance signal is an abnormal signal; when the distance signal is an abnormal signal, it is determined that the cigarette packet 121 in the carton 11 has a defect.
Wherein, S11 and S12 are synchronized, and are synchronized to form the corresponding relationship between the coded signal and the distance signal. The encoder 24 outputs encoded signals corresponding to various points on the barrel 11. The feeding period of the conveyor belt 200 is determined according to the coded signal of the encoder 24, and in this embodiment, the conveyor belt 200 transfers the strip cartridge 11 from the upstream station to the next adjacent station in one feeding period, so that it can be determined whether the strip cartridge 11 is the same strip cartridge 11 according to the feeding period of the conveyor belt 200. After judging whether the barrel 11 is the same barrel 11 according to the coded signal, judging whether cigarette packets 121 in the same barrel 11 have defects so as to determine the position of the barrel 11 with the defective cigarette packets 121. The signal on the shaft encoder 24 in the above embodiment corresponds to each position of the belt 23 in one cycle C, and since the barrel 11 is placed between the two limit teeth 22, the barrel 11 is located in one cycle C of the belt 23, and since the barrel 11 is limited by the limit teeth 22, the position in the gap of the limit teeth 22 is fixed, and therefore, the position of the barrel 11 in one cycle C is relatively fixed, and the position of the encoded signal corresponding to one cycle C of the belt 23 can also be regarded as corresponding to each point of the barrel 11. Similarly, the position of cigarette packet 121 in barrel 11 is relatively fixed, so that the coded signal can be associated with each point on cigarette packet 121.
Therefore, when a part of the cigarette packets 121 of the carton 11 have quality problems, the positions of the quality-problem cigarette packets 121 can be conveniently found out according to the corresponding relation formed by the coded signals and the coded signals, and convenience is brought to subsequent removal.
According to some embodiments of the present application, a method of determining a feeding period of a conveyor belt 200 from an encoded signal includes:
the shaft 242 of the encoder 24 is connected with the shaft center of the belt wheel 21 of the transmission belt 200, and the determining of the feeding period of the transmission belt 200 according to the encoding signal comprises:
acquiring a coding signal output by a coder every time the rotating shaft rotates for 360 degrees/n;
and in the process of rotating the rotating shaft for 360 degrees, obtaining the coded signals and sequentially marking the coded signals as positive integers from 1 to n.
When the two consecutive orders of the encoded signal are the same, it is determined that the transmission belt 200 transmits a feeding period C.
Specifically, the shaft encoder 24 is an absolute value shaft encoder, and the rotating shaft 242 of the shaft encoder 24 is connected to a driving element or a transmission element, in this embodiment, the rotating shaft 242 rotates once in one cycle C of the belt 23. The signal end 243 of the encoder 24 uniformly outputs n digital signals-1, 2 … … n, each digital signal corresponds to the position of the rotating shaft 242 one by one, n is determined by the type of the shaft encoder, and the larger n is, the higher the precision of the shaft encoder is. The position of the timing belt 1 is located by a signal from the shaft encoder 24. For example, the parameter n of the encoder 3 used in the present embodiment is 2880, every 8 signals are synthesized into one signal by the controller, and finally 360 signals are connected into the controller, where each signal corresponds to a different position of the belt 23 in one period C, that is, the position of each period C of the belt 23 is decomposed into 360 degrees. When the shaft 242 rotates one turn, the digital signal 1 output from the encoder 24 returns to the digital signal 1 output, which indicates that the transmission belt 200 has passed one cycle C.
According to some embodiments of the present application, the belt 23 of the conveyor belt 200 is evenly provided with the spacing teeth 22 along the feeding direction, and the feeding period C is:
the process of the upstream restricting tooth 22 moving to the position where the adjacent downstream restricting tooth 22 was previously located.
Specifically, when the rotating shaft 242 rotates 360 °, the belt 23 passes through a path that is the distance between two adjacent limit teeth 22, and therefore, after a period C, the previous limit tooth 22 will move to the end of the previous period, where the adjacent limit tooth 22 is located. When the rotating shaft 242 rotates 360 °, the transmission belt 200 passes through a feeding period C, and the length of the feeding period C is the sum of the length of the gap between two adjacent limiting teeth 22 and the length of one limiting tooth 22.
Through the corresponding relation of the transmission distance between the encoder 24 and the belt 23, the logic control method of the encoder 24 is simplified, the logic control can be realized through the simple absolute value encoder 24, the structure is simple and reliable, and the cost is lower.
Specifically, referring to fig. 7-9, fig. 7 and 8 are schematic diagrams illustrating the detection element provided by some embodiments of the present application detecting the trailing edge of a first cigarette packet from the leading edge of the first cigarette packet, and fig. 9 is a schematic diagram illustrating the detection element provided by some embodiments of the present application detecting the trailing edge of a tenth cigarette packet. When the first cigarette packet in cigarette packet group 12 passes under detection element 300, take N encoder signals a1, a2, A3 … … AN, and require: when the detection light beam irradiates the front edge of the first cigarette packet, the signal of the encoder is A1; when the detection light beam irradiates the rear edge of the first cigarette packet, the encoder signal is AN. The cigarette packet group 12 includes ten cigarette packets. The encoder signals of the second cigarette packet to the tenth cigarette packet are as follows:
B1、B2、B3……BN；
C1、C2、C3……CN；
D1、D2、D3……DN；
E1、E2、E3……EN；
F1、F2、F3……FN；
G1、G2、G3……GN；
H1、H2、H3……HN；
I1、I2、I3……IN；
J1、J2、J3……JN。
acquiring a distance signal of the detecting element 300
During the change of the signal of the shaft encoder from a1 to JN, the distance signal of the detector is acquired once per encoder signal and stored: x A1 、X A2 ……X JN . To achieve a one-to-one correspondence of the range signal to the encoder. It is convenient to locate the various points on the group 12 of packets.
According to some embodiments of the present application, a cigarette packet 121 within carton 11 has defects including missing packets and/or distortion.
Referring to fig. 5 and 6, fig. 5 is a schematic diagram of a lack of a cigarette pack in a carton according to some embodiments of the present application, and fig. 6 is a schematic diagram of a deformation of a cigarette pack in a carton according to some embodiments of the present application. Cigarette packet group 12 is missing packets such that the actual number of cigarette packets 121 in cigarette packet group 12 is less than the number of cigarette packets 121 in normal cigarette packet group 12. Tobacco bale 121 warp for because the effort that collides with or exert too big tobacco bale 121 extrusion deformation, even tobacco bale 121 surface produces the fracture in transportation or the snatching process. The above situation greatly affects the user experience. Therefore, the cigarette packet quality detection method in the embodiment can accurately detect the defects by simply detecting the distance, and can sort out the cigarette packets with problems.
According to some embodiments of the application, when the distance between the detection element 300 and the surface of the cigarette packet 121 is determined not to be within the distance range between the detection element 300 and the normal cigarette packet 121, the distance signal is determined to be a first abnormal signal.
The distance between the detection element 300 and the normal cigarette packet 121 is within the maximum and minimum allowable deviation ranges of the distance between the detection element 300 and the normal cigarette packet 121, and if the distance between the detection element 300 and the surface of the cigarette packet 121 is within the allowable deviation range, the distance between the surface of the cigarette packet 121 at the position and the detection element 300 is proved to be in accordance with the requirement.
When the distance signal is an abnormal signal, determining that the cigarette packet 121 in the carton 11 has a defect includes: and when the distance signal is the first abnormal signal, determining that the cigarette packet has the defect of missing the cigarette packet. Specifically, in this scheme, the detecting element 300 needs to obtain distance signals at different positions of the same upper cigarette packet 121, and detects a more accurate detection packet missing defect through detecting a plurality of positions.
According to some embodiments of the present application, further, referring to fig. 10, fig. 10 is a schematic diagram of a detecting element provided in some embodiments of the present application for detecting a packet missing position. When the distance between the detection element 300 and the surface of the cigarette packet 121 is judged not to be within the distance range between the detection element 300 and the normal cigarette packet 121, the judgment that the distance signal is the first abnormal signal comprises the following steps:
at least two distance signals are acquired on the surface of one cigarette packet 121, the average distance between the detection element 300 and the surface of the cigarette packet 121 is calculated according to the distance signals acquired on the surface of the same cigarette packet 121, and if the average distance is larger than the maximum allowable deviation value of the distances between the detection element 300 and the cigarette packet 121, the distance signals are judged to be first abnormal signals.
Specifically, N distance signals obtained from the detection element 300 to the first cigarette packet are X A1 、X A2 、X A3 ……X AN And averaging the values to obtain the average distance between the detection element 300 and the first cigarette packet:
|X A -M|≤P
wherein, the setting parameter M is the standard value of the distance between the detection element 300 and the cigarette packet 121. And setting parameters P, which are the maximum allowable deviation value of the distance between the detection element 300 and the cigarette packet 121.
The actual deviation distance between the first cigarette packet and the standard value is compared and judged with the parameter P; when | X is satisfied A And when M | ≦ P, determining that the first cigarette packet is present, otherwise, determining that the first cigarette packet is absent.
After judging that the first cigarette packet does not exist, taking N distance signals obtained from the detection element 300 to the first cigarette packet as X A1 、X A2 、X A3 ……X AN It is determined as a first abnormality signal. So that the coding signal corresponding to the first abnormal signal is reversely pushed in the subsequent station to obtain the position of the cigarette packet with the problem.
For example X A1 、X A2 、X A3 ……X AN The corresponding encoding signals are A1, A2 and A3 … … AN, and the encoding signals A1, A2 and A3 … … AN correspond to the first cigarette packet in the cigarette packet group 12. According to the mode, the position of the cigarette packet in the cigarette packet group 12 can be accurately positioned.
Similarly, the remaining cigarette packets in the cigarette packet group 12 are judged to exist according to the judgment mode of the first cigarette packet.
In another embodiment, the detecting element 300 is a digital photo detector, and the detector is characterized in that when a cigarette packet is detected, a 24VDC signal is output, the controller determines the signal as a logic signal 1, when no cigarette packet is detected, no signal is output from the detector 9, the controller determines the signal as a logic signal 0, and the logic signal 0 is a first abnormal signal. The packet missing detection process comprises the following steps:
during the change of the signal from a1 to JN of encoder 24, detection element 300 scans group 12, acquires a distance signal from detection element 300 once every encoder signal appears, and determines that group 12 is normal when these signals are all 1; and when the 0 signal appears once, the cigarette pack group 12 is judged to have defects. The method is simpler in signal processing, and only can be used for detecting with lower precision, such as detecting by a digital photoelectric detector under the deformation condition of lacking of a cigarette packet or large sinking degree.
According to some embodiments of the present application, determining whether the distance signal is an abnormal signal includes: at least two distance signals are obtained on the surface of a cigarette packet 121, and when the fluctuation of the distance signals on the same cigarette packet 121 is larger than the maximum value of the allowable fluctuation range of the distance between the detection element 300 and the cigarette packet 121, the distance signals are judged to be second abnormal signals;
when the distance signal is an abnormal signal, determining that the cigarette packet 121 in the carton 11 has a defect includes: when the distance signal is determined as the second abnormal signal, the cigarette packet 121 in the barrel 11 has a defect of deformation. When cigarette packet 121 is extruded and deformed, the surface of cigarette packet 121 is stressed and bent, which causes the surface of cigarette packet 121 to be concave-convex, and when detecting element 300 scans the surface of cigarette packet 121, the size of the distance signal is greatly different. If the tobacco bale 121 surface is level and smooth, the size difference of distance signal is less, the fluctuation degree of distance signal is judged by judging the size difference of distance signal, and the deformation defect of tobacco bale 121 is detected more intuitively.
According to some embodiments of the present application, further, with reference to fig. 11 and 12, fig. 11 and 12 are schematic diagrams illustrating detection of a trailing edge from a leading edge of a deformed cigarette packet 123 by a detection element provided by some embodiments of the present application. At least two distance signals are acquired on the surface of one cigarette packet 121, and when the fluctuation of the distance signals on the same cigarette packet 121 is greater than the maximum value of the allowable fluctuation range of the distance between the detection element 300 and the cigarette packet 121, the distance signals are judged to be second abnormal signals, including: calculating a standard deviation according to the distance signal acquired on the same cigarette packet 121;
the maximum value of the allowable fluctuation range of the distance between the detection element 300 and the cigarette packet 121 comprises a predetermined standard deviation which allows the cigarette packet 121 to deform. If the standard deviation of the distances between each key point on the upper surface of the cigarette packet 121 and the detection element 300 is greater than the predetermined standard deviation of the deformation of the cigarette packet, the distance signal corresponding to the cigarette packet 121 is a second abnormal signal.
Specifically, N distance signals obtained from the detection element 300 to the first cigarette packet are X A1 、X A2 、X A3 ……X AN ；
σ A Is the standard deviation, σ A The deformation degree of the surface of the first cigarette packet is reflected, and the larger the value is, the higher the deformation degree is. Specifically, the standard deviation σ can show the fluctuation of the surface shape of the cigarette packet 121, when the surface of the cigarette packet 121 is smooth and flat, the numerical value of the standard deviation σ tends to be 0, and when the surface of the cigarette packet 121 is concave-convex, the numerical value of the standard deviation σ is increased, and the concave-convex fluctuation of the surface of the cigarette packet 121 can indicate that the cigarette packet 121 is bent to some extent. When the fluctuation degree of the surface shape of the cigarette packet 121 is larger than a certain value, it can be judged that the cigarette packet is deformed.
Thus, σ A And comparing with Q, wherein a parameter Q is set, and the parameter represents the maximum value of the deformation degree of the cigarette packet.
When sigma is A Q is less than or equal to Q, the first tobacco bale is judged to be normal, otherwise, the tobacco bale is judged to be an unqualified tobacco bale.
The remaining cigarette packets in cigarette packet group 12 are determined in the same manner. After judging that the first cigarette packet does not exist, taking N distance signals obtained from the detection element 300 to the first cigarette packet as X A1 、X A2 、X A3 ……X AN And determining an abnormal distance signal.
In another embodiment, the detection of the adjacent edges of two cigarette packets is used to determine whether the cigarette packet group 12 in the carton 11 has defects.
Specifically, the distance signal obtained when the detecting element 300 scans from the rear edge of the first cigarette packet to the front edge of the second cigarette packet is X AN ……X B1 The signals represent the condition of the adjacent edges of the first cigarette packet and the second cigarette packet, and the signals are processed as follows:
taking X AN ……X B1 Maximum value X of signal ABMAX ＝MAX(X AN ……X B1 )，X ABMAX Indicates that the first cigarette packet and the second cigarette packet are detected by the detecting element 300The trough parts of the adjacent edges of the cigarette packet;
(X A +X B ) 2 represents the average value of the detection distances of the non-edge parts of the first cigarette packet and the second cigarette packet;
wherein the content of the first and second substances,
X ABMAX -(X A +X B ) And/2 represents the downward concave distance of the wave trough parts of the adjacent edges of the first cigarette packet and the second cigarette packet relative to the surface of the cigarette packet 121, and the numerical value of the downward concave distance of the wave trough is within a fixed range under the normal condition.
Setting this range parameter to R and R (R)>R), R represents the maximum value allowed by downward sinking of the adjacent edges of the cigarette packets, R represents the minimum value allowed by downward sinking of the adjacent edges of the cigarette packets, and when R is more than or equal to X ABMAX -(X A +X B ) And r is greater than or equal to 2, judging that the adjacent edges of the first cigarette packet and the second cigarette packet are qualified. Otherwise, judging that the adjacent edges of the first cigarette packet and the second cigarette packet are unqualified.
And (4) judging the adjacent edges of the rest cigarette packets according to the mode, wherein 9 adjacent edges exist in the normal ten cigarette packets.
The quality of the cigarette packet in the carton can be considered to be unqualified if the unqualified condition occurs once in the 9 times of judgment, such as the occurrence of bag missing and the like.
In the scheme, in the process that the cigarette packet group 12 passes below the detection element 300, the encoder signal processed by the controller is 1 to 245, wherein the normal cigarette packet group 12 comprises ten cigarette packets 121; the specific encoder signal correspondence relationship is:
the encoder signal corresponding to the first cigarette packet is 1, 2, … … 20;
the encoder signals corresponding to the second cigarette packet are 26, 27 and 28 … … 45;
the encoder signals corresponding to the third cigarette packet are 51, 52 and 53 … … 70;
the encoder signals corresponding to the fourth cigarette packet are 76, 77 and 78 … … 95;
the encoder signals corresponding to the fifth cigarette packet are 101, 102 and 103 … … 120;
the encoder signals corresponding to the sixth cigarette packet are 126, 127, 128 … … 145;
the encoders corresponding to the seventh cigarette packet are 151, 152 and 153 … … 170;
the encoder signals corresponding to the eighth cigarette packet are 176, 177, 178 … … 195;
the encoder signals corresponding to the ninth cigarette packet are 201, 202 and 203 … … 220;
the encoder signals corresponding to the tenth cigarette packet are 226, 227, 228 … … 245.
Because the corners of cigarette packets 121 are often set to be round corners, the valley parts of the adjacent edges of two cigarette packets 121 are sunken downwards relative to the surface of cigarette packets 121, and the sunken downwards condition is normal. Encoder signals 21, 22, 23 … … 25 are reserved as trough parts of the first cigarette packet and the second cigarette packet. In the application, the defects are detected through the distance signals to the cigarette packet 121, and the deviation is increased if the wave trough part is placed in the calculation, so that the accuracy of the calculation result is reduced. Therefore, in the actual calculation process of the average distance of the cigarette packets and the standard deviation of the cigarette packets, the trough part influencing the precision is eliminated.
The distance signal X of the detecting element 300 is acquired and stored once per encoder signal while the encoder signal changes from 1 to 245 1 、X 2 、X 3 ……X 245
M is the standard value of normal tobacco bale distance, and P is the maximum value of tobacco bale distance allowed deviation.
Calculating the average distance of the first cigarette packet
If | X A -M | ≦ P, determining that the first cigarette packet is present, otherwise determining that the first cigarette packet is absent.
Similarly, the average distance of the second cigarette packet is calculated
If | X A -M | ≦ P, determining that the second cigarette packet is present, otherwise determining that the second cigarette packet is absent.
And judging the existence of other tobacco packets in the same way.
Cigarette packet deformation judgment
Q represents the maximum value of the allowable deformation degree of the cigarette packet.
Calculating the standard deviation of the first cigarette packet
If σ is A Judging that the first cigarette packet is normal when the Q is not more than Q; otherwise, the tobacco bale is judged to be an unqualified tobacco bale.
And judging the deformation degree of the other cigarette packets according to the same mode.
The scheme also comprises the following steps: after determining that the cigarette packet 121 in the carton 11 has defects, rejecting the carton 11 with the defective cigarette packet 121; the carton filling equipment comprises a recovery module, wherein the recovery module is used for removing the cartons 11 corresponding to the defective cigarette packets 121 according to the coding signals and the abnormal signals sent by the coder 24.
Specifically, the detection element 300 acquires the distance signal and the encoder 24 sends out an encoding signal corresponding to the distance signal. Therefore, the coded signal of the encoder 24 corresponds to the distance signal one by one, and it can be said that the coded signal can be pushed back according to the distance signal, and the coded signal contains the position information of the barrel 11, so that the position of the specific cigarette packet 121 in the barrel 11 can be easily located according to the coded signal. Through the mode, after the distance signal is judged to be the abnormal signal, the distance signal can correspond to the corresponding tobacco bale 121 according to the coding signal, so that the carton 11 with the defective tobacco bale 121 can be removed, the defective tobacco bale 121 in the carton 11 can be quickly positioned according to the coding signal for timely remediation, and the cost is reduced.
According to some embodiments of the present application, the side-opening strip pack filling apparatus further comprises a distance signal acquisition module, a code signal acquisition module, and a detection module;
the distance signal acquisition module is used for acquiring a distance signal on the detection element 300, the distance signal is the distance from the detection element 300 to the surface of the cigarette packet 121, and the detection element 300 is fixed above the conveyor belt 200;
the coded signal acquisition module is used for acquiring a coded signal sent by the encoder 24 and determining a feeding period according to the coded signal;
and the detection module is used for judging whether the cigarette packet 121 in the carton 11 has defects according to the distance signal and the coding signal.
The detection module can be used for carrying out the cigarette packet quality detection method provided by the embodiment. By implementing the cigarette packet quality detection method, the defects of missing packets and extrusion deformation of the cigarette packets 121 in the carton 11 can be quickly and accurately detected. Meanwhile, in the specific scheme, in the processes of detecting the missing and the extrusion deformation of the cigarette packet 121 in the barrel 11, parameters of the average distance between the cigarette packet 121 and the detection element 300 are adopted, so that in the actual use process, after the detection element 300 detects a distance signal, the average distance between each cigarette packet 121 and the detection element 300 is calculated, and then each cigarette packet 121 and the detection element 300 are further calculated according to different judgment modes, so that the defects of missing and the extrusion deformation are detected.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A cigarette packet quality detection method is characterized in that the method is applied to carton filling equipment, the carton filling equipment comprises a conveying belt and a detection element, the conveying belt is used for conveying cartons periodically, an encoder is arranged on a driving element or a transmission element of the conveying belt, at least two cigarette packets are accommodated in the cartons along the feeding direction, the detection element is fixed above the conveying belt, the detection element acquires a distance signal, and the distance signal is the distance from the detection element to the surfaces of the cigarette packets;
the method comprises the following steps:
acquiring a plurality of distance signals, wherein the distance signals are the distances between the detection elements and the surfaces of all cigarette packets in the carton in sequence;
determining the feeding period of the conveying belt according to the coding signal of the coder;
judging whether the cigarette packet in the same box has defects or not according to the distance signal and the coding signal; and judging whether the distance signal is an abnormal signal or not, and determining that the cigarette packet in the carton has defects when the distance signal is the abnormal signal.
2. The method of claim 1, wherein the shaft of the encoder is coupled to a pulley hub of the conveyor belt, and determining the feed cycle of the conveyor belt based on the encoded signal comprises:
acquiring a coding signal output by the coder every time the rotating shaft 242 rotates 360 degrees/n;
in the process of rotating the rotating shaft 242 for 360 degrees, the obtained coded signals are sequentially marked with positive integers from 1 to n;
and when the two continuous standard sequences of the coded signals are the same, determining that the conveying belt conveys a feeding period.
3. The method as claimed in claim 2, wherein the belt of the conveyor belt is uniformly provided with limit teeth along the feeding direction, and the feeding period is as follows:
the process of the upstream spacing tooth moving to the position where the adjacent downstream spacing tooth was previously located.
4. A method according to any one of claims 1-3, characterized in that the packet of cigarettes inside the carton is defective including missing packets and/or being deformed.
5. The method of claim 1, wherein determining whether the distance signal is an abnormal signal comprises: when the distance between the detection element and the cigarette packet surface is not within the distance range between the detection element and the normal cigarette packet, the distance signal is judged to be a first abnormal signal;
when the distance signal is an abnormal signal, determining that the cigarette packet in the carton has defects, comprising the following steps: and when the distance signal is a first abnormal signal, determining that the cigarette packet has the defect of missing the cigarette packet.
6. The method according to claim 5, wherein when the distance between the detection element and the cigarette packet surface is not within the distance range between the detection element and the normal cigarette packet, the judging that the distance signal is the first abnormal signal comprises the following steps:
the method comprises the steps of obtaining at least two distance signals on the surface of a cigarette packet, calculating the average distance between a detection element and the surface of the cigarette packet according to the distance signals obtained on the surface of the same cigarette packet, and judging that the distance signals are first abnormal signals if the average distance is larger than the maximum allowable deviation value of the distance between the detection element and the cigarette packet.
7. The method of claim 4, wherein determining whether the distance signal is an abnormal signal comprises: the method comprises the steps that at least two distance signals are obtained on the surface of a cigarette packet, and when the fluctuation of the distance signals on the same cigarette packet is larger than the maximum value of the allowable fluctuation range of a detection element and the cigarette packet distance, the distance signals are judged to be second abnormal signals;
when the distance signal is an abnormal signal, determining that the cigarette packet in the carton has defects, comprising the following steps: when the distance signal is judged to be the second abnormal signal, the cigarette packet in the carton has the defect of deformation.
8. The method as claimed in claim 7, wherein the step of determining that the distance signal is the second abnormal signal when at least two distance signals are obtained from the surface of a cigarette packet and the fluctuation of the distance signal on the same cigarette packet is larger than the maximum value of the allowable fluctuation range of the distance between the detection element and the cigarette packet comprises the following steps:
calculating a standard deviation according to the distance signals acquired on the same cigarette packet;
the maximum value of the allowable fluctuation amplitude of the distance between the detection element and the cigarette packet comprises a predetermined standard deviation of the deformation of the cigarette packet.
9. A method according to claim 1, wherein the carton filling apparatus comprises a recycling module for rejecting cartons having defective cigarette packets, the method further comprising: determining that the cigarette packet in the carton has defects;
and according to the abnormal signal of the coding signal, the recovery module rejects the carton of the cigarette packet with the corresponding defect.
10. A side-opening type carton filling device is characterized by comprising a distance signal acquisition module, a code signal acquisition module and a detection module;
the distance signal acquisition module is used for acquiring a distance signal on a detection element, wherein the distance signal is the distance from the detection element to the surface of a cigarette packet, and the detection element is fixed above the conveyor belt;
the coding signal acquisition module is used for acquiring a coding signal sent by the encoder and determining a feeding period according to the coding signal;
and the detection module is used for judging whether the cigarette packet in the carton has defects or not according to the distance signal and the coding signal.
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