CN113977669B - Automatic machine vision sheet defect eliminating method - Google Patents
Automatic machine vision sheet defect eliminating method Download PDFInfo
- Publication number
- CN113977669B CN113977669B CN202111593687.0A CN202111593687A CN113977669B CN 113977669 B CN113977669 B CN 113977669B CN 202111593687 A CN202111593687 A CN 202111593687A CN 113977669 B CN113977669 B CN 113977669B
- Authority
- CN
- China
- Prior art keywords
- sheet
- flaw
- detection system
- signal
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/007—Control means comprising cameras, vision or image processing systems
-
- 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
-
- 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
- B07C5/361—Processing or control devices therefor, e.g. escort memory
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/005—Computer numerical control means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/27—Means for performing other operations combined with cutting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8918—Metal
Abstract
The invention provides an automatic machine vision sheet flaw removing method which comprises a vision detection system and a PLC (programmable logic controller) control unit, wherein the PLC control unit receives a cutting knife cutting signal of a removing device when the length specification of a sheet is changed, and the PLC control unit sends a signal with an offset to the vision detection system; the visual inspection system uses the offset signal to generate an offset cutter signal corresponding to the head and tail of the current actual sheet. The automatic sheet removing machine can be embedded into the existing sheet production line, automatically removes defects, automatically adapts to the replacement specification, and automatically upgrades the existing equipment.
Description
Technical Field
The invention relates to an automatic machine vision sheet flaw removing method. The sheet material can be a copper foil substrate, a PP (impregnated fiberglass cloth) sheet material production line or a pole piece die cutting, the sheet material production line refers to a cutting production line for cutting continuous sheet materials into specified lengths, and the removing system is an independent system.
Background
In a sheet production line, the rejection system is an independent system, and the traditional quality inspection mode adopts an artificial later-stage visual inspection rejection mode. This approach is unsatisfactory in terms of efficiency, labor intensity, and accuracy.
Some systems use a visual inspection system to detect and further enable a rejection system to perform rejection according to signals from the visual inspection system. However, in practice, although the visual inspection system and the rejection system are in communication, the rejection system and the visual inspection system are two independent systems, and the distance between the detection position of the visual inspection system and the cutting position of the cutting knife is not an integral multiple of the cutting length, which results in a large length error area; in addition, during actual production, specification changes frequently, an error area changes due to the influence of size change of the sheet and the defect position of a machine vision system, if a defect appears in the error area, a cutter signal is directly utilized according to a conventional control mode, on the contrary, a qualified product is rejected and an unqualified product is released, so that the defective sheet cannot be accurately rejected, meanwhile, a specific coordinate position of the defect on the sheet cannot be displayed in a vision detection system, and subsequent manual tracking and searching are difficult to achieve.
Disclosure of Invention
The invention aims to solve the technical problem of providing a machine vision method for automatically removing the sheet defects, which can automatically and accurately remove the defective sheets. Therefore, the invention adopts the following technical scheme:
the automatic machine vision method for eliminating the defects of the sheet is characterized in that a system for realizing the method comprises a vision detection system and a PLC (programmable logic controller) control unit, so that the PLC control unit receives a cutting signal of a cutter of an eliminating system when the length specification of the sheet is changed, and the cutting length of the sheet is judged according to the cutting signal;
then, detecting the distance from the position to the cutting position of the cutter through a visual detection system, calculating the number of sheets and the residual amount corresponding to the distance, converting the residual amount into an advance or retard offset, and sending a signal with the offset to the visual detection system through a PLC (programmable logic controller) control unit;
the signal with the offset is a cutter signal corresponding to actual rejecting equipment of the visual detection system, the visual detection system generates a cutter signal with the offset by using the signal with the offset to enable the cutter signal to correspond to the head and the tail of a current actual sheet, when a flaw appears on the sheet, the visual detection system firstly detects the flaw to judge whether the flaw is qualified or not, when the flaw is judged to be unqualified, an unqualified signal is sent to the PLC control unit, the PLC control unit gradually decreases according to the number of the waiting sheets, and a signal is output to the rejecting equipment to finish rejecting action.
Preferably, when the length signal is provided, the PLC takes the previous 3 times of cutter signals, and determines whether the lengths of the first three sheets are less than the threshold value, and if the lengths are consistent, determines the length of the sheet of the length specification.
Furthermore, the PLC control unit and the visual detection system are respectively provided with an encoder, and the visual detection system decodes the signal with the offset through the encoder to obtain the advance or lag offset; during normal production, the PLC control unit synchronously sends a signal with an offset to the visual detection system according to the cutter signal every time.
Further, according to the technical solution of the present invention, the vision inspection system can provide the specific coordinate position of the flaw on the actual sheet based on the head and tail of the current actual sheet corresponding to the post-shift cut-off knife signal:
preferably, the image pickup device in the vision inspection system employs a linear camera, and the light sensing assembly of the linear camera is arranged in a straight line perpendicular to the sheet conveying direction passing through the inspection position.
Further, the visual inspection system detects the coordinates of the flaw on the sheet to which the flaw belongs; the flaw abscissa is the number of pixels from the sheet edge to the flaw multiplied by the detection accuracy; and multiplying the pulse number of the encoder from the head of the actual sheet to the flaw point after the offset is superposed by the accuracy of the encoder.
Further, an ink jet device is arranged after the visual detection system detects the position and before the cutter, the ink jet device is directly communicated with the visual detection system, when the visual detection system detects a flaw, information of the abscissa and the ordinate of the flaw is sent to the ink jet device, and when the flaw runs to the position of the ink jet device, the ink jet device can mark the position of the flaw.
Furthermore, a set of display and tracking device is arranged after the visual detection system detects the position and before the cut-off knife, the visual detection system is in communication connection with the display and tracking device, and a plurality of light sources arranged in an array mode are arranged on the display and tracking device; when the vision detection system detects a flaw needing to be rejected, the vision detection system sends the abscissa and the ordinate of the flaw to the display and tracking device, the display and tracking device calculates the range of which light source the abscissa of the flaw belongs to, and when the flaw moves to a position below the light source, the corresponding light source is lightened, so that the position of the flaw is lightened, and the position of the flaw is indicated.
Further, the visual inspection system detects the coordinates of the flaw on the sheet to which the flaw belongs; set up marking machine behind visual detection system detection position and before the cut-off knife, visual detection system with marking machine communication connection, when the visual detection system detects the flaw point that will reject, send the ordinate of flaw point for marking machine, when the flaw point moves the marking machine position, the marking machine chance is beaten at piece edge.
The automatic sheet removing machine can be embedded into the existing sheet production line, automatically removes defects, automatically adapts to the replacement specification, and automatically upgrades the existing equipment. According to the invention, the size of the sheet is automatically identified through the PLC, the number of waiting sheets and the residual amount are automatically calculated by utilizing a PLC program, the PLC calculates the delay value (advanced or delayed offset) by utilizing the residual amount, then the visual detection system achieves the purpose that the removing equipment can accurately remove the defect by utilizing the signal with the offset, the defect position of each sheet is consistent with the defect coordinate of the visual detection system, and real-time output display can be realized.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
FIG. 2 is a schematic diagram of an on-site tool according to the present invention.
Fig. 3 is a schematic diagram of the visual inspection system of the present invention for determining the head and tail of each sheet.
FIG. 4 is a process flow diagram of the present invention.
FIG. 5 is a schematic diagram of a linear camera photosensitive element employed in the vision inspection system of the present invention.
FIG. 6 is a schematic view of a scanning of a linear camera employed in the vision inspection system of the present invention.
FIG. 7 is a schematic diagram of the principle of the linear camera used in the vision inspection system of the present invention to determine defects.
FIG. 8 is a schematic diagram of a first marking method for a defect point according to the present invention.
FIG. 9 is a schematic diagram of a first marking method for a defect point according to the present invention.
FIG. 10 is a schematic diagram of a first marking method for a defect point according to the present invention.
Detailed Description
Reference is made to figure 1. The system for implementing the automatic rejection method comprises a PLC control unit 2, a visual detection system 1, rejection equipment 3, an encoder 4 and a sensor 5. The PLC control unit 2 is connected with an encoder 4, and the vision detection system 1 is also provided with an encoder. The rejection device comprises a rotatable rejection table 6, the rejection table 6 is arranged between a cutter position of the sheet production line rejection device and the discharge transfer line, and the cutter is positioned behind the extrusion roller of the sheet production line.
In the invention, the PLC control unit controls the rejection table of the rejection system to rotate, and when the product is qualified, the rejection table is in a lifting state and is connected with the outlet of the extrusion roller and the discharging transfer line, so that the cut qualified sheets enter the discharging transfer line one by one. When the product is judged to be unqualified, the PLC control unit controls the rejecting platform to rotate downwards to be connected with the conveyor line of the rejected sheet, so that the cut unqualified sheet does not enter the discharging transfer line but is sent to the conveyor line of the rejected sheet, and then the rejecting platform is lifted and rotated back immediately.
The system for implementing the automatic eliminating method is embedded in a production line, the action of a cutting knife is not controlled, but a PLC control unit 2 establishes communication with an eliminating system to obtain a cutting knife signal, a visual detection system 1 is in communication connection with the PLC control unit 2, and during normal production, the PLC control unit synchronously sends a signal with an offset to the visual detection system according to the cutting knife signal every time as a virtual cutting knife signal, and the signal received every time offsets a delay value calculated by the PLC control unit to be used as the head of a current front piece. Wherein:
the visual inspection system 1: the signal corresponding to the delay value given by the PLC is received, then the signal is translated into a corresponding offset value through an encoder, a cut-off knife signal with an offset is generated by utilizing the offset, whether the cut-off knife signal with the offset is defective or not or whether the number of the defects exceeds a set value or not is judged, and if so, an unqualified signal is output to the PLC control unit 2. Wherein:
input,0, receiving a PLC control unit preparation completion signal Y (0);
input,1, receiving a PLC Delay completion signal Y (1) (a virtual cutter signal which is consistent with a head and tail signal of an actual sheet after adjustment);
output, 6: outputting an unqualified signal to the PLC control unit.
A PLC control unit: the PLC receives a cutter signal of the multi-time removing device (preferably the previous 3 times), and automatically recognizes the new specification length of the sheet after the specification is changed as the sheet length. Using this sheet length, the number of sheets and the remaining amount of waiting from the detection position 101 to the cutter cutting position 102 of the vision detection system are calculated, and the remaining amount is converted into a Delay value, which is a delayed (backward) distance value or an advanced (forward) distance value from the detection position as a base, to the vision detection system, and the vision system uses a signal with a shift amount (Delay value) as a virtual cutter signal. Wherein:
x (0): receiving an encoder signal;
x (2): receiving a cutting signal of a rejection system;
x (3): receiving a disqualified signal of the visual inspection system;
x (4): receiving a plate changing and specification changing signal of the removing equipment;
x (5): receiving a sensor signal;
y (0): sending a completion signal to the rejecting device;
y (1): sending a signal of the offset amount to a visual inspection system;
y (4): sending unqualified signals to a rejecting device;
the PLC part functions:
receiving a cut-off knife signal to automatically calculate the length of a plate with the current specification;
secondly, identifying the cloth joints through a sensor, and automatically removing the front 2 pieces and the rear 3 pieces of the cloth joints.
And thirdly, acquiring the pulse number of different speeds through an encoder, calculating the real-time length, and obtaining the compensation curvature of the influence of the client machine table on the length of the sheet material at different speeds (high and low speeds) through multiple high and low speed experiments so as to ensure that the cutting signal of each length of the sheet material sent to the visual detection system is consistent with the length of the actually produced sheet material.
Alarming prompt, abnormal size, abnormal alarm of a visual system and a cutting machine table and the like.
And fifthly, counting the number of unqualified rejects.
The removing device 3: the client production line equipment can send a cutting signal to the PLC control unit and receive a control signal of the PLC;
the encoder 4: the pulse type encoder has the step pitch of 1mm/Tick and provides square wave signals for the PLC.
The sensor 5: and detecting a cloth joint signal to the PLC, wherein the cloth joint signal is obtained by connecting the large roll and the large roll by using a special adhesive tape, and detecting the joint adhesive tape by using a sensor 5 to trigger a signal.
Connection relation:
the visual inspection system 1 and the PLC control unit 2 establish communication through a network cable, and the communication protocol is TCP/IP.
The PLC control unit 2 and the encoder 4 are in hard-line connection with shielding and transmit pulse signals.
The PLC control unit 2 is in hard-line connection with the customer removing device 3 and is controlled by a switching value signal.
To further illustrate the present invention, the following detailed description will be made by taking a production line of PP (impregnated fiberglass cloth) as an example and combining with the accompanying drawings.
Assuming that a certain sheet length produced by a manufacturer has 1000 sheets, after the specification of one batch is produced, the sheet length is switched to the length of another specification, and the removing equipment of the manufacturer sends a size changing signal to the PLC control unit 2 to inform the PLC control unit 2 that the sheet length is changed in the next batch.
The PLC control unit 2 receives the size changing signal, the length of the sheet between every two cutting knife signals is used as a piece of length (the pulse number of an encoder between the two cutting knife signals), the PLC control unit 2 takes the cutting knife signals of the previous 3 times, judges whether the lengths of the 3 pieces are consistent, if so, the length of the sheet produced at this time is the length of the sheet produced at this time, and if 3 times are within a threshold range, the average value of the lengths of the sheets is used as the length of the sheet produced at this time.
The PLC control unit 2 then detects a fixed distance D (determined according to a sheet travelling track) from a position 101 to a cutting position 102 of the removing device through a visual detection system, calculates the number of waiting sheets and the residual amount corresponding to the fixed distance according to the length of the sheets, converts the residual amount into a delay value as an offset amount, sends a signal with the offset amount to the visual detection system as a virtual cutter signal, the so-called virtual cutter signal is a cutter signal corresponding to the visual detection system, the visual detection system corresponds the cutter signal to the head and the tail of the current actual sheet 200, when a flaw appears in the sheet, firstly judges whether the flaws are qualified through visual detection, if the flaws or a set score is exceeded, the flaws are unqualified, sends an unqualified signal to the PLC control unit 2, the PLC control unit 2 then decreases according to the number of the waiting sheets determined before, and outputting a signal to the removing equipment to complete removing action.
In the above method, the logic operation of the PLC control unit 2 is:
the distance from the detection position of the visual detection system to the cutting position of the cutter is D, the length of the sheet material is A,
d ÷ a = number of waiting sheets (P) + remaining amount (X), and the PLC sets a-X = Y as a Delay value.
For example, the distance from the visual inspection system to the position of the cutter is 10 meters (according to the conveying route of the material), the length of the newly replaced sheet is 2.2 meters, and then 10 ÷ 2.2=4 (sheets) +1.2 meters, so that the distance from the visual inspection system to the cutter is totally 4 sheets +1.2 meters, and the PLC memorizes the number of sheets. And then 2.2 m-1.2 m = 1m, which represents the delayed distance, the PLC control unit 2 generates modified cutter signals correspondingly delayed after processing, and transmits the modified cutter signals to the visual inspection system as virtual cutter signals, the virtual cutter signals correspond to the head and the tail of the currently and actually produced sheet, and one sheet is arranged between the two virtual cutter signals.
In the past, the main reason for inaccurate rejection is that the visual system directly utilizes a cutter signal, the cutter signal indicates the head and the tail of an actual sheet, and the distance between the visual system and the cutter divided by the length of the sheet is not necessarily an integer. As exemplified above, the error distance is up to 1 meter according to conventional methods.
According to the scheme of the invention, the length of the sheet in the size specification is automatically recognized through the PLC, the number of sheets waiting between the detection position of the visual detection system and the cutting knife and the numerical value of Delay are calculated through logical operation, whether the sheet is qualified or not is detected and judged through the flaw of the visual detection system, if the sheet is not qualified, a signal is output to the PLC control unit 2, and after the number of sheets is decreased progressively, a rejection control signal is output to rejection equipment by the PLC control unit 2, so that the rejection table finishes the rejection of the sheet. The whole process is automated, the former manual rejection is replaced, the labor cost of 2 persons for rejecting equipment to reject the appearance is saved, the waiting time for manual rejection at each time can be saved, continuous production is realized, and the production efficiency is greatly improved. Compared with the prior method for outputting a signal to control the rejecting table of the rejecting device by the vision detection system, the method not only realizes automatic switching during specification conversion, but also comprehensively improves rejecting accuracy and can output the coordinate positions of the defects.
The invention embodies the perfect combination of the visual detection system and the realization of the functions of the automation equipment. The traditional visual detection system is only responsible for detecting surface flaws, and the detected flaws are used for alarming. The invention makes a bold attempt on the function of the machine vision system, not only utilizes the flaw detection function of the vision detection system, but also combines the logic operation of the PLC, links the vision detection system with the customer automation equipment through the bridge of the PLC, really realizes the online flaw detection and automatic elimination functions of the machine vision detection system, and further can output the coordinate position of the flaw for display, coloring mark and the like. This is further explained below.
The visual detection system has the functions of flaw detection and classification, sheet virtual cutter signal display, sheet defect counting, standard exceeding setting and signal input and output. The visual inspection system uses a linear camera 7 for the detection of defects, the core of which is a device of optoelectronic semiconductors, called light-sensitive element, on which are arranged a number of light-sensitive elements in a line, each light-sensitive element being a pixel, the direction of which coincides with the CD direction.
The CD and MD dimensions of each pixel of the photosensitive element would be the same, taking an 8K camera as an example, each pixel is 7umX7um, there are 8192 pixels in line, and the resulting image signal is a set of digital values corresponding to the intensity of light measured by each pixel. The motion of the light sensing elements is from left to right, starting with the first pixel, each pixel in turn repeating the measurement and converting the intensity of the light to a set of digital values. The set of values is immediately output via the Pixel clock, and each scan outputs information of all pixels, which is called a scan cycle, and the corresponding inverse becomes the scan frequency.
The vision inspection system uses a linear camera to inspect a continuously produced material, the linear camera being arranged such that the alignment of the photosensitive elements is perpendicular to the direction of conveyance of the sheet, so that the vision inspection system will produce a two-dimensional image by one-dimensional analysis of the individual movements.
The longitudinal direction of the detected material (the conveying direction of the sheet) is the longitudinal direction and is defined as md (machine direction), and the width direction of the detected material is the transverse direction and is defined as cd (cross direction), and these two directions are perpendicular to each other.
Referring to fig. 3, 6 and 7, when the vision inspection system receives the delay value of the PLC control unit, the inspection position virtually moves from the 101 position to the 103 position, so that the actual rejection accuracy can be ensured, and the actual position of the flaw on the sheet can correspond to the flaw coordinate position of the vision system, that is, one sheet detected by the camera corresponds to an actual sheet. Thereby also ensuring that the defect is accurate in both the abscissa and ordinate of the sheet.
The flaw abscissa is the number of pixels from the edge of the sheet to the flaw multiplied by the detection accuracy, such as 4000 pixels from the flaw to the left edge of the sheet, with a detection accuracy of 0.1mm/Pixel, then the flaw abscissa is 400 mm.
The ordinate of the flaw is 760mm when the pulse number of the encoder from the head of the sheet, i.e., the virtual cutter signal, to the flaw is multiplied by the encoder accuracy, for example, the pulse number of the encoder from the head of the sheet to the position of the flaw is 20000tick, and the encoder accuracy is 0.038 mm/tick.
The visual inspection system can set and select which category of defects need to be rejected. If the current piece detects the defect to be removed, the visual detection system sends a removal signal to the PLC control unit after the tail part is detected, the PLC control unit waits for the number to be decreased progressively through calculation, and sends a removal device signal to control the removal platform 6 to rotate downwards, so that the function of automatic removal of the defective piece is realized, and a piece picking person can be informed of the specific position of the defect on one piece.
The vision system detects the flaw needing to be eliminated, and the following output marking modes are mainly adopted:
1. as shown in fig. 8, after the vision inspection system detects the position 101, an inkjet device 8 is disposed before the cutter 102, the inkjet device directly communicates with the vision inspection system, when the vision inspection system detects a defect, the information of the abscissa and the ordinate of the defect is sent to the inkjet device, and when the defect travels to the position of the inkjet device, the inkjet device marks the defect position, generally a red circular pattern, so that the picking person can quickly identify the defect.
2. As shown in fig. 9, after the visual inspection system detects the position 101, a set of display and tracking device is arranged in front of the cutting knife 102, the visual inspection system and the display and tracking device are connected in communication, and the display and tracking device is provided with a plurality of light sources 9 arranged in an array. When the vision detection system detects a flaw needing to be removed, the vision detection system also sends the abscissa and the ordinate of the flaw to the display and tracking device, the device judges which light source the flaw belongs to by calculating the abscissa of the flaw, when the flaw moves to the position below the light source, the corresponding light source is lightened to lighten the position of the flaw and indicate the position of the flaw, meanwhile, the machine is paused, the machine can be realized through the communication between the display and tracking device, the conveying line control system and the removing device, the flaw is identified or processed at the lightened position manually, and then the machine is recovered to operate.
3. As shown in fig. 10, after the visual inspection system detects the position 101, before the cutting knife 102, a marking machine is set, the visual inspection system is in communication connection with the marking machine, when the visual inspection system detects a defect point to be removed, the vertical coordinate of the defect point is sent to the marking machine, when the defect point runs to the marking machine position, the marking machine can stick a red label paper on the edge of the sheet as a mark, and after the removing table is removed, the defect point can be manually searched in the CD direction of the red label paper position and processed.
The vision detection system can also be provided with a warning lamp in a matched manner, when the vision system detects a flaw point, the vision system outputs the flaw point to the warning lamp, the red lamp is turned on, and the buzzer sounds to remind an operator of the machine station of detecting the flaw point to be removed.
In summary, the implementation steps of the automatic elimination method of the invention are as follows:
(1) after the specification is replaced, the PLC control unit 2 receives a cutter signal of the removing device, judges 3 sheets, judges whether the sheets are in the qualified length range, if the sheets are not in the qualified length range, takes 4 sheets, judges whether the 2 nd, 3 rd and 4 sheets are in the qualified length range, and sequentially judges until the sheets are in the qualified length range.
(2) The PLC control unit 2 sends a work order uploading signal to the vision inspection system 1, uploads the work order, and starts inspection. Meanwhile, the PLC control unit 2 judges the number of sheets and the delay distance from the detection position of the vision detection system to the position of the cutting knife by utilizing the length of each sheet, and sends the delay distance to the vision detection system for displacement processing of the position of the detection point during each cutting so as to ensure that the head and the tail of each sheet displayed on the interface of the vision detection system are consistent with the head and the tail of each sheet actually produced.
(3) During detection of the visual detection system, if one piece of the defect detection system has no defects from head to tail or qualified product defects, no signal is sent, when the visual detection system detects that a certain piece of the defect detection system has the defect to be eliminated, an eliminating signal is sent to the PLC control unit when the piece is at the tail, and meanwhile, the horizontal coordinate and the vertical coordinate of the defect are output to a rear ink jet device or other marking equipment.
(4) The inkjet device or other marking device receives the position coordinates from the vision system and will emit a red mark at the location of the flaw. And meanwhile, after receiving the rejection signal of the visual detection system, the PLC control unit calculates the number of waiting sheets, decreases the number to 1, sends a signal to rejection equipment, and the rejection equipment receives the rejection signal and controls the rejection table to rotate downwards to reject the next sheet with the flaw.
The above actions are all automatically completed. And subsequently, manually judging the sheet, finding out a red mark, judging the cause of the flaw point and the like.
The above embodiment is merely a preferred technical solution of the present invention, and it should be understood by those skilled in the art that the technical solutions or parameters in the embodiments may be modified or replaced without departing from the principle and essence of the present invention, and all of them should be covered within the protection scope of the present invention.
Claims (8)
1. The machine vision sheet flaw automatic eliminating method is characterized in that a system for realizing the method comprises a vision detection system and a PLC control unit, the system for realizing the method does not control the action of a cutter, but the PLC control unit establishes communication with eliminating equipment to obtain a cutter signal, so that the PLC control unit receives the cutter signal of the eliminating equipment when the length specification of a sheet is changed, and the cutting length of the sheet is judged according to the cutter signal;
then, detecting the distance from the position to the cutting position of the cutter through a visual detection system, calculating the number of sheets and the residual amount corresponding to the distance, converting the residual amount into an advance or retard offset, and sending a signal with the offset to the visual detection system through a PLC (programmable logic controller) control unit; the visual detection system is in communication connection with the PLC control unit, and the PLC control unit synchronously sends signals with offset to the visual detection system according to the cutting knife signals each time during normal production;
the signal with the offset is a cutter signal of actual removing equipment corresponding to the visual detection system, and the visual detection system takes the signal received each time to offset an advanced or delayed offset value calculated by the PLC control unit as the head of the current sheet; the visual detection system generates a cutter signal with an offset by using the signal with the offset, the cutter signal is enabled to correspond to the head and the tail of the current actual sheet, when a flaw appears on the sheet, the visual detection system firstly detects the flaw to judge whether the flaw is qualified or not, when the flaw is judged to be unqualified, an unqualified signal is sent to the PLC control unit, the PLC control unit gradually decreases according to the number of the waiting sheets, and a signal is output to the removing equipment to complete removing action.
2. The machine vision method for automatically eliminating defects of sheet materials as claimed in claim 1, wherein the PLC control unit takes the previous 3 times of cutter signals and judges whether the lengths of the first three sheets are less than the threshold value, if yes, the length of the sheet material is judged to be the length of the sheet material with the length specification.
3. The machine vision method for automatically eliminating the sheet defects as claimed in claim 1, wherein the PLC control unit and the vision detection system are respectively provided with an encoder, and the vision detection system decodes the signal with the offset through the encoder to obtain an advance or lag offset; during normal production, the PLC control unit synchronously sends a signal with an offset to the visual detection system according to the cutter signal every time.
4. The machine vision method for automatically removing sheet defects as claimed in claim 1, wherein said image capturing device of said vision inspection system uses a linear camera, and the line of alignment of the photosensitive components of the linear camera is perpendicular to the direction of sheet conveyance past the inspection position.
5. The machine-vision method of automatic defect culling for sheeting of claim 4, wherein the flaw abscissa is the number of pixels from the edge of the sheeting to the flaw multiplied by the detection accuracy; and multiplying the pulse number of the encoder from the head of the actual sheet to the flaw point after the offset is superposed by the accuracy of the encoder.
6. The machine vision method for automatically eliminating sheet defects as claimed in claim 1, wherein the vision inspection system detects the coordinates of the defects on the sheet to which the defects belong; and when the flaw runs to the position of the ink jet device, the ink jet device can mark the position of the flaw.
7. The machine vision method for automatically eliminating sheet defects as claimed in claim 1, wherein the vision inspection system detects the coordinates of the defects on the sheet to which the defects belong; a set of display and tracking device is arranged after the visual detection system detects the position and before the cut-off knife, the visual detection system is in communication connection with the display and tracking device, and a plurality of light sources arranged in an array mode are arranged on the display and tracking device; when the vision detection system detects the flaw needing to be removed, the vision detection system sends the horizontal coordinate and the vertical coordinate of the flaw to the display and tracking device, the display and tracking device calculates the range of which light source the horizontal coordinate of the flaw belongs to, when the flaw moves to the position below the light source, the corresponding light source is lightened, the position of the flaw is lightened, and the position of the flaw is indicated.
8. The machine vision method for automatically eliminating sheet defects as claimed in claim 1, wherein the vision inspection system detects the coordinates of the defects on the sheet to which the defects belong; set up marking machine behind visual detection system detection position and before the cut-off knife, visual detection system with marking machine communication connection, when the visual detection system detects the flaw point that will reject, send the ordinate of flaw point for marking machine, when the flaw point moves the marking machine position, the marking machine chance is beaten at piece edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111593687.0A CN113977669B (en) | 2021-12-24 | 2021-12-24 | Automatic machine vision sheet defect eliminating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111593687.0A CN113977669B (en) | 2021-12-24 | 2021-12-24 | Automatic machine vision sheet defect eliminating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113977669A CN113977669A (en) | 2022-01-28 |
| CN113977669B true CN113977669B (en) | 2022-05-03 |
Family
ID=79734193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111593687.0A Active CN113977669B (en) | 2021-12-24 | 2021-12-24 | Automatic machine vision sheet defect eliminating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113977669B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055385B (en) * | 2022-06-09 | 2024-03-22 | 黄冈师范学院 | Automatic defect eliminating method for machine vision sheet |
| CN114800660B (en) * | 2022-06-27 | 2022-09-30 | 浙江双元科技股份有限公司 | Defect positioning system and method for sheet slitting |
| CN117549666B (en) * | 2023-12-27 | 2024-04-12 | 广州市普理司科技有限公司 | Control system of reverse detection quality control machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008290024A (en) * | 2007-05-25 | 2008-12-04 | Anritsu Sanki System Co Ltd | Article inspection device |
| CN105571500A (en) * | 2016-01-26 | 2016-05-11 | 中塑联新材料科技湖北有限公司 | Random tester for plastic sheet production line |
| CN111097717A (en) * | 2019-12-31 | 2020-05-05 | 凌云光技术集团有限责任公司 | Self-adaptive waste rejecting control method and system for machine vision quality detection equipment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934228A (en) * | 1989-01-13 | 1990-06-19 | U.S. Natural Resources, Inc. | System for diverting veneer sheets having offsize defects |
| JP2759696B2 (en) * | 1990-01-16 | 1998-05-28 | 大日本印刷株式会社 | Defect inspection sheet cutting device |
| CN1979924B (en) * | 2005-12-10 | 2010-08-25 | 深圳市比克电池有限公司 | Method for cutting lithium ion cell pole piece |
| JP5846705B1 (en) * | 2015-02-05 | 2016-01-20 | 有限会社栃木オートメーション | Sheet cutter |
| CN105881632B (en) * | 2016-03-24 | 2017-07-07 | 青岛万龙智控科技有限公司 | Sizing material cut-to-length system and method |
| CN107639043B (en) * | 2017-09-26 | 2020-06-09 | 武汉华星光电技术有限公司 | Panel classification moves and carries device |
| CN112847558A (en) * | 2020-12-31 | 2021-05-28 | 软控股份有限公司 | Device for removing defective sections in film |
| CN112958490A (en) * | 2021-02-01 | 2021-06-15 | 广州市兴世机械制造有限公司 | Defective product tracking system and method on automatic production line |
| CN113019979A (en) * | 2021-05-08 | 2021-06-25 | 杭州家俊制丝科技有限公司 | Intelligent visual cocoon selection device |
| CN113709167B (en) * | 2021-08-30 | 2023-04-07 | 杭州百子尖科技股份有限公司 | Compression transmission method of appearance detection data |
| CN113799215B (en) * | 2021-09-26 | 2023-08-22 | 深圳市英威腾电气股份有限公司 | Material to be sheared transmission control method and die cutting equipment |
-
2021
- 2021-12-24 CN CN202111593687.0A patent/CN113977669B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008290024A (en) * | 2007-05-25 | 2008-12-04 | Anritsu Sanki System Co Ltd | Article inspection device |
| CN105571500A (en) * | 2016-01-26 | 2016-05-11 | 中塑联新材料科技湖北有限公司 | Random tester for plastic sheet production line |
| CN111097717A (en) * | 2019-12-31 | 2020-05-05 | 凌云光技术集团有限责任公司 | Self-adaptive waste rejecting control method and system for machine vision quality detection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113977669A (en) | 2022-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113977669B (en) | Automatic machine vision sheet defect eliminating method | |
| CN112179910B (en) | Real-time detection processing method and system for defects of lithium battery pole piece | |
| EP0326284B1 (en) | Apparatus and method of processing lumber | |
| CN102095733B (en) | Machine vision-based intelligent detection method for surface defect of bottle cap | |
| CN1147384C (en) | Inspection of edges | |
| CN104614379B (en) | A kind of detecting system and method for plate surface defect | |
| CN107052086A (en) | Stamping parts surface defect detection apparatus and detection method based on 3D vision | |
| CN111229648A (en) | Solar cell panel flaw detection system and detection method based on machine vision | |
| CN101750416A (en) | Visual welding seam surface quality detection sensor based on line structure light | |
| CN113145489B (en) | System, method and equipment for removing defective products in bag making process | |
| CN114473249B (en) | Pole piece die cutting method and system | |
| CN211347985U (en) | Machine vision detection device applied to surface detection industry | |
| CN104132945A (en) | On-line surface quality visual inspection device for bar based on optical fiber conduction | |
| CN106153636A (en) | The detection method of tyre wire cord fabric surface defect, Apparatus and system | |
| CN105301008A (en) | Tipping paper quality test warning system and on-line quality test method | |
| CN112285114A (en) | Enameled wire spot welding quality detection system and method based on machine vision | |
| CN117086494A (en) | Die-cutting and slitting system and visual detection method for die-cutting and slitting | |
| CN114527141A (en) | Shaving board surface defect collection system | |
| CN110715623A (en) | Ceramic tile flatness detection equipment and method | |
| CN112834522A (en) | Visual detection feedback control system | |
| CN103718024B (en) | Sheet glass testing fixture, sheet glass inspection method, sheet glass manufacturing apparatus and sheet glass manufacture method | |
| CN116309375B (en) | Method for detecting double-sided defects of solid wood plate and determining intelligent processing coordinates | |
| CN102922879B (en) | Color code type automatic positioning product detection device and method | |
| US20230186454A1 (en) | Machine vision system for inspecting quality of various non-woven materials | |
| CN110605244A (en) | Product quality detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ge Ming Inventor after: Li Hui Inventor after: Shen Jingxue Inventor before: Li Hui Inventor before: Ge Ming Inventor before: Shen Jingxue |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |