KR20040075171A - Paper cup inspection system and badness condition inspection method paper cup - Google Patents

Abstract

PURPOSE: A paper cup inspection system and a method are provided to improve quality of the paper cup, exactly manage a yield rate for the paper cup, and rapidly analyze a bad paper cup by automatically removing paper cups having bad conditions. CONSTITUTION: A paper cup inspection system includes a conveyance member(102), a camera(110b), a control module part(120), and a PLC part. The conveyance member(102) obtains a paper cup to be inspected from a paper cup supplying part and sequentially inspects the paper cup. The camera(110b) has a frequency in proportion to a conveyance speed of the conveyance member(102) and photographs the paper cup according to a paper cup detecting operation of a first paper cup detecting sensor. The control module part(120) determines whether or not the paper cup is inferior.

Description

Paper cup inspection system and badness condition inspection method paper cup}

The present invention relates to a paper cup inspection system and a method for inspecting a defective state of a paper cup using the same, and more particularly, to inspect the appearance of contaminated and crushed states of various paper cup inner surfaces, and to automatically determine a defective paper cup in a transfer line. The present invention relates to a paper cup inspection system capable of producing a paper cup of uniform and stable quality, and a defect state inspection method of a paper cup using the same.

In general, paper cups used in vending machines, various fast food restaurants, chain stores, etc. are mass-produced and provided at a high speed in order to reduce labor costs, and the manufactured paper cups are provided with a separate inspection equipment to determine whether foreign matters are in the paper cups. After determining whether it is contaminated or whether the paper cup is molded correctly or not, it is packaged and supplied in a predetermined amount.

Such a paper cup inspection is applied as one of the important processes to prevent unstable factors such as decrease in sales due to the decrease in confidence in the product that can be caused by the paper cup defect when only the paper cup is produced and supplied only. There is a situation. In recent years, as the Product Liability Act has been in force, the defect inspection process is more precisely performed in order to minimize the defective rate of the product produced by the manufacturer to respond to product liability.

However, when determining whether the paper cup is in a defective state, for example, there is a foreign matter inside the paper cup, or whether the floor molding and wall forming are defective, and the adhesion state is correctly performed, according to the inspection process, only a simple inspection method by manual operation is performed. Because of this support, accurate inspection cannot be performed in a short time, and even if the inspection equipment for inspecting the above-described paper cup defect state is supported, such inspection equipment is only available for individual inspection methods such as molding state, foreign matter adhesion state and adhesion state. As it was provided, no efficient inspection process was achieved.

In addition, since the proportion of the defective paper cups and the portion of the paper cups determined to be defective among the inspected paper cups could not be processed in real time, accurate statistics could not be prepared quickly.

Therefore, the present invention has been made in order to solve the above problems, whether there is a foreign material, etc. on the inner surface of the paper cup produced or whether there is no crushed portion formed by the molding, or whether the cup leaks according to the adhesive state The purpose of the present invention is to provide a paper cup inspection system and a paper cup inspection method using the same to improve product reliability and prevent waste of resources.

In addition, it is possible to process in real time, such as a defective rate of the paper cup caused by the failure of the paper cups examined in order to ensure that various statistics and such data storage is processed correctly.

The paper cup inspection system of the present invention for achieving the above object is moved in a predetermined speed and direction according to a predetermined driving force, a conveying member for receiving and conveying a paper cup to be inspected sequentially from the paper cup supply, when the paper cup is conveyed A camera for photographing a xenon lamp and a paper cup flashing according to the paper cup sensing operation of the first sensing sensor while having the same frequency proportional to the conveying speed of the conveying member in an upper direction thereof, and an image of the paper cup photographed from the camera. The control module unit which determines whether the paper cup is defective or not according to the result of comparison with the previously stored reference information by dividing the inner surface into several areas for the paper cup to receive and inspect the information, and detecting the paper cup determined as the second detection. Separate classification by air discharge according to paper cup detection To the solenoid valve and the air discharge valve is an air discharge means which includes additional PLC drive configuration provided by.

In addition, a method of inspecting a defective state of a paper cup using the paper cup inspection system of the present invention is to supply a paper cup on a moving member moving at a high speed or a low speed, fixing the paper cup at a predetermined position, the paper cup seated on the conveying member at a predetermined speed The xenon lamp having the same frequency as the conveying speed of the conveying member according to the control signal of the microprocessor receiving the sensing signal of the first detecting sensor indicating that the imaging position has been reached when moving in the Imaging the paper cup; converting the analog data of the captured paper cup into digital data; dividing and storing the inner surface of the paper cup into one or more regions by an area division program; and storing the divided one or more region data in advance. Area standard information and each inspection A process of determining whether the inner surface of the paper cup is contaminated or crushed by a bell or not, and according to the sensing operation of the second sensing sensor located at a predetermined distance from the first sensing sensor, the paper cup determined as defective from the process. Recognizing the proximity state of the paper cup, characterized in that the process consisting of the step of separating on the conveying member according to the air discharge operation of the air discharge valve installed on the side of the conveying member.

According to the present invention having the above-described configuration, it is possible to determine whether the paper cup is defective in real time, as well as to automatically remove the paper cup determined as the defect can improve the quality, accurate yield management and poor paper cup You can quickly run your analysis on.

1 is a block diagram showing a paper cup inspection system according to a preferred embodiment of the present invention;

Figure 2 is an embodiment showing a layout view of a paper cup inspection system according to the present invention,

3 is a view showing the image data for each area of the paper cup for use as reference data for the paper cup inspection of the present invention,

4A to 4D are diagrams showing states in which image data for each region shown in FIG. 3 is individually set;

5a to 5c is a view showing an embodiment that appears as a poor paper cup test result according to the present invention,

6 is a view showing a state in which various information is displayed on the display unit in relation to the paper cup inspection according to the driving of the inspection program of the present invention,

Figure 7 is a flow chart showing a bad state inspection method of the paper cup using the paper cup inspection system according to a preferred embodiment of the present invention.

* Explanation of symbols for main parts of the drawing

100: paper cup supply portion, 102: conveying member,

104a, 104b: first and second detection sensors, 110a: xenon lamp,

110b: camera, 120: control module unit,

122: A / D conversion unit, 124: microprocessor,

128: data storage, 130: inspection program,

140: PLC unit, 150: air discharge means,

150a: air exhaust valve, 150b: solenoid valve.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a block diagram showing a paper cup inspection system according to a preferred embodiment of the present invention, Figure 2 is an embodiment showing a layout view of a paper cup inspection system according to the present invention, Figure 6 is according to the driving of the inspection program of the present invention FIG. Is a view showing a state in which various information is displayed on a display unit in relation to a paper cup inspection.

As shown in Figure 1 and 2, receiving a predetermined driving force is moved in a predetermined speed and direction, the transfer member 102 for receiving and conveying a paper cup to be inspected sequentially from the paper cup supply unit 100 on its upper surface, Xenon lamp (110a) is installed in the upper direction of the paper cup seated on the conveying member 102 and having the same frequency proportional to the conveying speed of the conveying member 102, the high brightness illumination most similar to the flashing and operating solar light (110a) And imaging means 110 provided with a camera 110b for capturing a paper cup when the xenon lamp blinks, a driving signal for imaging of the camera 110b, and analog data captured according to the imaging operation. The digital cup for the paper cup converted according to the conversion operation of the / D conversion unit 122 is applied to determine whether the paper cup is defective according to the comparison operation with the previously stored reference information. The solenoid valve is configured to receive a signal from the microprocessor 124 and the micro cup 124 in real time, and to classify the paper cup determined as defective among the paper cups seated on the transfer member 102. PLC unit 140 for driving the air discharge means 150 provided with 150b and the air discharge valve 150a is configured to include.

In addition, the microprocessor 124 is provided with a separate inspection program 130 for inspecting whether the paper cup is defective. The inspection program 130 divides the inner surface of the paper cup into a plurality of areas and has respective information. An area division program is provided for accessing the data storage unit 128 and determining whether there is a defect by each individual inspection level. As shown in FIG. 6, the total quantity of paper cups to be inspected in accordance with driving of the inspection program, Each window is configured to display the defect status of each area such as a floor defect display unit, a wall defect display unit, an area error generation unit, a cup center error generation unit, and the like from the defect information generated by each region inspection of the paper cup according to the paper cup inspection. The display unit 126 is provided with a window capable of indicating normal and defective states according to the window and the paper cup defect inspection.

The microprocessor 124, the display unit 126, the data storage unit 128, the inspection program 130, and the A / D conversion unit 122 are, for example, the control module unit 120 installed in the computer system. Can be configured.

The data storage unit 128 stores fringe threshold information, wall threshold information, and bottom threshold information for a paper cup. That is, the image information for the paper cup to be inspected is set and stored. At this time, the critical information with the conveying member 102 on which the paper cup is seated to find the center of the paper cup, and the fringe threshold information of FIG. 4A (Th1: see FIG. 3). Threshold information (Th2: Fig. 3) for the wall between the fringe and the bottom surface, as shown in Figure 4b, threshold information of the bottom (bottom) and bottom edge (bottom edge) as shown in Figures 4c and 4d ( Th3: Fig. 3).

In addition, while detecting the paper cup in close proximity for the imaging operation of the paper cup, the paper cup determined as defective by the control module unit 120 from the conveying member 102 by the air discharge operation of the air discharge means 150 The first detecting sensor 104a and the second detecting sensor 104b for detecting whether the defective paper cup is close to each other are installed at positions spaced apart from the conveying member 102 by a predetermined distance.

On the other hand, although not shown in the drawing, the conveying member 102 has an air inlet for sucking air in the central part of the place where the paper cup is seated so that the seated paper cup maintains a fixed posture, and the color of the conveying member is Colors opposite to the color of the paper cup are supported, for example, since the paper cup is usually made of white, it is preferable that black is supported so that the white can be observed most clearly.

The operation of the present invention configured as described above will be described with reference to FIGS. 1 to 7B.

First, the operator must process the image operation for the paper cup of the type to be inspected and then store the reference information for performing the comparison operation with the image information of the imaged paper cup, Figures 3 and 4a to 4d As shown in the following, the paper cups are set for each area such as fringe threshold information (Th1, a), wall threshold information (Th2, b), floor threshold information (Th3, c), and bottom border threshold information (d). The operation is performed and stored in the data storage unit 128. In this case, the reference information for the paper cup is newly set and stored for each paper cup to be examined according to the diameter and size.

As described above, when power-on driving is performed from the state in which image critical information applied as reference information for each region of the paper cup is set and stored for each region, a series of operations for inspecting the paper cup are performed.

First, a paper cup is provided and seated on the conveying member 102 which is moved from the paper cup supplying part 100 at a predetermined speed and direction in accordance with the application of power. When the paper cup is seated at a predetermined position on the conveying member 102, the drawing is not shown. However, the paper cup is fixed by suctioning air through the suction valve mounted at the air inlet. For example, the paper cup seated on the upper surface of the conveying member 102 has an outer circumferential surface protruding from the bottom surface and when the seat is seated on the conveying member 102, a hollow portion is formed between the lower end of the paper cup and the conveying member 102 at the contact portion thereof. As a result, it is possible to provide a sufficiently fixed posture upon air inhalation (step 200 to step 208).

At this time, it is possible to determine whether the paper cup is correctly seated, by comparing the color of the paper cup with the support color of the upper surface of the transfer member 102, the paper cup is determined whether it is seated in the center position, if one direction from the center position When it is out of the position to perform the position correction according to the air suction process to be seated correctly (step 207).

In this state, when the paper cup is moved, the microprocessor 124 detects a pulse signal in the form of a negative pulse indicating that the first detection sensor 104a mounted in front of the installation portion of the camera 110b has reached the position where the paper cup is to be photographed. (Step 210, step 212). Then, the microprocessor 124 transmits a camera driving signal and a xenon lamp blinking signal in the form of a negative pulse of approximately 600 Hz to image the paper cup (step 214), where the camera 110a and the xenon lamp 110b are transferred. Since it has the same frequency as the conveying speed of the member 102, it is possible to capture a still image (One frame capture) even when the paper cup is moving at a constant speed (step 216).

That is, when the xenon lamp 110b blinks and the camera 110a is driven to capture a paper cup, a normal pulse of approximately 64 ㎲ is generated as an image signal detected in the form of a one frame capture and A / D is generated. The image information is applied to the conversion unit 122, and the image information is converted into digital data through the A / D conversion unit 122 and then applied to the microprocessor 124.

Subsequently, according to a control operation of the microprocessor 124, the divided information is divided so as to be individually compared with the reference information according to a predefined region division program (step 218), and then each divided region image and data storage unit 128 are divided. In step 220, a comparison process is performed with reference information for each region stored in FIG.

Thereafter, the microprocessor 124 determines whether the image information of the digitally converted paper cup is defective by the inspection program 130 in real time (step 222).

For example, the image information of the imaged paper cup is displayed on the display unit 126 as it is dirty and crushed state, the displayed image information is poor adhesion of the bottom surface as shown in FIG. Determining whether there is an abnormality with the reference information set through the comparison process with the corresponding reference information (for example, Fig. 4c or 4d) and makes a bad decision, and as shown in Figs. Even if there is a defect and there is a foreign material on the inner surface of the paper cup, the difference between the fringe threshold information of FIG. 4A and the wall threshold information of FIG.

Of course, since the paper cup has only one seam on the wall (FIG. 3), it is possible to determine whether the position of the seam is correctly positioned on the wall of the paper cup as the main axis, the minor axis, and the angle.

In addition, if it is determined that the defect is determined according to the comparison process between the image information and the reference information as described above, a window related to 'badness' provided in the display unit 126 is displayed, so that the paper cup state can be grasped in real time. .

Of course, the display unit 126 can display the total number of paper cups to be inspected, the defective rate for each region, the total defective rate, and the like, and can be applied as accurate inspection data.

If a determination is made as to a defect on any paper cup being conveyed according to the above-described failure status determination process (YES in step 222), the microprocessor 124 moves the air discharge valve 150a from the position where the camera 110b is located. The mutual distance (t: Fig. 2) to the position of the position and the transfer time for moving the distance are calculated, and the air discharge preparation signal for the defective paper cup is applied to the PLC unit 140.

From this state, when the second detecting sensor 104b mounted on the conveying member 102 recognizes the defective paper cup and sends a detection signal to the PLC unit 140 (step 230), the PLC unit 140 The solenoid valve 150b is turned on according to the control signal of the microprocessor 124 and the air is discharged through the air discharge valve 150a mounted on the side of the transfer member 102 (step 232). Accordingly, the paper cup, which is determined to be defective according to the air discharge, is classified and stored as a space separately mounted at a predetermined position of the transfer member 102 line (step 234). At this time, if the second detection sensor 104b cannot detect because the defective paper cup is not reached, the standby state for the detection is continued when the defective paper cup is reached (step 236).

On the other hand, if there is no abnormality with the inspection level according to the comparison result with the predetermined reference information in the defective determination process, it is determined as a normal paper cup, and sent to a separate storage space for packaging to be loaded (step 228).

On the other hand, the paper cup inspection system of the present invention and a method for inspecting a defective state of a paper cup using the same, but only the inspection process for a general paper cup having a predetermined diameter and size, but the standard information for the cup to be inspected Since it is possible to inspect a cup inspection having various capacities, such as a test for a corresponding cup and a defect of a cup made of a material other than a paper material, the modified embodiments different from those described in the present invention may protrude. Even if it should not be understood individually from the technical spirit or prospects of the present invention, it should belong to the claims attached to the present invention.

As described above, according to the present invention, in the state in which the image information on the cup is input, the cup which is determined to be defective by inspecting in real time an external appearance test that generates foreign substances or dents in the cup surface according to a comparison process with the reference information. By immediately removing from the inspection line, there is an effect that can improve the confidence in the production of uniform and stable quality products.

Moreover, compared to the conventional manual inspection method, the inspection and packaging personnel can be significantly reduced, so that cost reduction can be expected, as well as defect ratios generated in the inspection process in real time, and accurate yield and defect analysis are possible. The database can be used to improve the work process.

Claims (8)

A conveying member which is moved at a predetermined speed and direction according to a predetermined driving force, and sequentially receives and conveys a paper cup to be inspected from the paper cup supply unit; A camera for photographing a xenon lamp and a paper cup which are flashed according to a paper cup sensing operation of the first sensing sensor while having the same frequency proportional to the conveying speed of the conveying member when the paper cup is conveyed, A control module unit for determining whether a paper cup is defective or not according to a result of comparison with previously stored reference information by dividing an inner surface into a plurality of areas for a paper cup to be inspected by receiving image information about the paper cup photographed from the camera; And a PLC unit for driving the air discharge means provided with the solenoid valve and the air discharge valve to separately classify the paper cup determined as the defective by the air discharge according to the paper cup detection operation of the second detection sensor. Inspection system. The method of claim 1, Detecting a paper cup in close proximity for the imaging operation of the paper cup, while detecting the proximity of the defective paper cup in order to separate the paper cup determined as defective by the control module unit from the conveying member by the air discharge operation of the air discharge means. The first detection sensor and the second detection sensor for the paper cup inspection system, characterized in that each installed in a position spaced apart from the transfer member. The method according to claim 1 and 2, The control module unit transmits the driving signal of the camera according to the proximity detection of the paper cup of the first detection sensor, and receives the image information of the digitally converted paper cup according to the imaging operation of the camera, and according to the comparison result with the reference information. A microprocessor that transmits a signal for driving the air discharge to the PLC unit to separate the defective paper cup, one or more image information divided by an area division program and previously stored region division reference information for determining whether the micro cup is defective. And a data storage unit for storing the fringe threshold information, the wall threshold information, and the bottom threshold information for the paper cup. The method of claim 3, wherein The inspection program includes a bottom defect display unit, a wall defect display unit, an area error generation unit, a cup center error generation unit, and the like from the total quantity of paper cups to be inspected and defect information determined by inspection of each area of the paper cup according to the paper cup inspection. A paper cup inspection system, characterized in that each window is displayed to display a defective state for each area, and a display unit is provided with a window capable of displaying normal and bad states according to the paper cup defect inspection. The method of claim 1, The conveying member has an air inlet formed at a central portion of the place where the paper cup is seated so that the paper cup supplied from the paper cup supplying part maintains a fixed posture according to the air suction driving of the suction valve, and the upper surface of the conveying member is a paper cup. Paper cup inspection system, characterized in that formed in a color opposite to the manufacturing color of the paper cup to accurately identify the. Supplying a paper cup on a conveying member moving at a high speed or a low speed, and fixing the paper cup at a predetermined position; Xenon having the same frequency as the conveying speed of the conveying member in accordance with a control signal of the microprocessor receiving the sensing signal of the first sensing sensor indicating that the paper cup seated on the conveying member has reached the imaging position when moving at a predetermined speed and direction. Photographing the paper cup according to a camera driving together with a flashing operation of a lamp; Converting the analog data of the photographed paper cup into digital data and dividing and storing the inner surface of the paper cup into one or more regions by an area division program; Determining whether or not the degree of contamination of the inner surface of the paper cup and the crushed state are deteriorated based on the divided one or more pieces of area data based on previously stored reference information and respective inspection levels; According to the sensing operation of the second sensing sensor located at a predetermined distance from the first sensing sensor, the paper cup determined to be defective from the above process recognizes the proximity of the paper cup and releases the air from the air discharge valve installed on the side of the conveying member. According to the paper cup inspection system using a paper cup inspection system, characterized in that the process of detaching from the conveying member according to. The method of claim 6, And a paper cup supplied to the conveying member to maintain a fixed posture according to a suction operation through an air suction hole formed at a portion on which the paper cup is seated. The method of claim 6, And a defect rate for each part and a total defect ratio of the paper cups, which are determined as defectives among all the paper cups, in real time according to the determination of the defects of the paper cups.