JPH02229264A - Inspection of sheet material and defect-removing method - Google Patents

Abstract

PURPOSE:To quickly perform the detection and elimination of troubles in pretreatment step and to improve the quality and production efficiency of a sheet material by detecting defects of a sheet material from an image taken by an image-pickup device placed in a winding stage, storing the data in a data-processing device and displaying in real time. CONSTITUTION:A light source and an image-pickup device consisting of a halogen lamp and a CCD camera are placed in a winding stage of a moving sheet material and the defects of the sheet material are detected based on the image taken by the camera. The information on the position, size, etc., of the defect is inputted via a signal processing device into a data processing device such as a personal computer. Said data processing device stores the defect information on a floppy disk and displays on a CRT monitor in real time. A defect- removing level is set based on the above defect information and the defect is removed by temporarily stopping the operation of the winding process.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for inspecting and removing defects in sheet-like materials such as nonwoven fabrics, synthetic fiber filament sheets, and films. This article concerns a method for removing these defects. Conventional technology In the manufacturing process of non-embroidered cloth, synthetic fiber filament sheets, films, etc., raw material bolimar adhering to the spinneret surface or discharge die often falls and gets mixed onto the melted and discharged sheet. There was a problem in that problems occurred during the process, such as fluctuations in the discharge of the raw material borimmer, which caused unevenness in the thickness of the sheet, degrading the quality of the product. For this reason, sheet inspection equipment has been developed to detect defects that occur in sheet materials due to these problems. With the traditional method, it is difficult to test! The detected data is printed out and used as defect information for the next process, rewind (
When sending the material to the (return) process, it was common for the removal level to be set by human judgment and transferred to a separate list before being sent. The problem that the invention aims to solve When posting to a separate list as described above, it often happens that defect information cannot be accurately sent to the next process due to transcription errors. There is also a method (Japanese Unexamined Patent Publication No. 63-249768) in which marks are pasted and displayed online on defective areas using a mark pasting machine linked to a fabric inspection device, but the marks may come off during operation, or when the marks are pasted. Make a mistake. When removing marks, there were problems such as forgetting the sushi, leaving glue residue, marks being torn, and being unable to judge the size of defects, and it was often not possible to accurately send defect information to the next process. The present invention solves the above-mentioned problems.In the process of continuously producing sheet-like products, even if defects are detected during inspection of the sheet-like products, continuous production is possible, and defects can be reliably removed. The object of the present invention is to provide a method for inspecting a sheet-like material and a method for removing defects thereof, which can be carried out without deteriorating product quality or production efficiency due to defects.

Means for Solving the Problems In order to solve the above-mentioned problems, the sheet-like material inspection method of the present invention provides a light source and an imaging device to run the sheet-like material in the sheet-like material winding process. The imaging device continuously captures images while the camera is moving, detects defects in the sheet-like object based on the images obtained by the imaging device, and transmits this defect information to a data processing device via a signal processor. The defect information is stored by a processing device and displayed on a display device, and the method for removing defects from a sheet-like object according to the present invention is characterized in that the defect information is stored by a processing device and displayed on a display device. The present invention is characterized in that a defect removal level is set based on the defect information detected and stored based on the image obtained, and the operation is stopped in the process of rolling up the sheet-like material to remove the defects. The light source used in the sheet-like material inspection method of the present invention is
The imaging device for detecting defects may be any device that can emit light at a wavelength with sufficient sensitivity, such as an incandescent bulb, halogen lamp,
Fluorescent light. You can use strobes, etc. Imaging device! The end is C. C. Cameras based on the D method are common, and these imaging devices exhibit sufficient effects with linear sensors, but area sensors arranged two-dimensionally may also be used. Note that imaging with an imaging device is usually done by placing a light source on the opposite side of the sheet-like object and using transmitted light, but depending on the nature of the sheet-like object, if the sheet-like material is thick or does not transmit light, the light source is placed on the opposite side of the sheet-like object. Arranged on the same side! This can also be done using reflected light. As the data processing device, an FA personal computer for inspection is used, which is equipped with a display device that displays the defect information data transmitted from the signal processor on the screen, a printer that prints the data, and a storage device that stores and saves the defect information data. All of the detected sheet defect information (position, size, etc. in the longitudinal and width directions of the sheet) is stored in a storage medium such as a floppy disk. In addition, in the method for removing defects from a sheet-like material of the present invention, a sheet-like material having defects and inspected by the above-described inspection method is sent to a rewinding process, and the defect information stored in, for example, a 7rotubi disk is sent to a rewinding process. , sends a signal to stop the operation of the rewinding device at the defective part that requires removal work while rewinding the sheet-like object, by comparing it with the previously set defect removal level, and thereby stopping the operation of the rewinding device. Stop and remove the defective parts. Effect With the above configuration, in the process of winding up a sheet-like object, defects are detected from the images while being continuously captured by the imaging device and processed by the data processing device, so that defects in the sheet-like object that are continuously sent are detected from the images and processed by the data processing device. Defect information, such as the location and size of defects, can be displayed in real time, and if defects are concentrated in a specific location, it is possible to immediately take measures such as finding and eliminating the cause in the previous process of the sheet material. In addition, since all the defect information of the rolled sheet material is stored, there is no error caused by inaccurate information, and inspection work and defect removal work can be carried out efficiently. EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a device 1 used in a sheet-like material inspection method and its defect removal method according to an embodiment of the present invention;
Figure 2 is a schematic plan view of the main parts of the device. In FIGS. 1 and 2, a supply port roller 2, a take-up roller 3, and a winding device 4 are arranged in this order as a device for winding up the sheet material IA to be inspected. A light source 5 consisting of a halogen lamp is installed on the lower surface side of the sheet-like object IA near the entrance side of 2, and an imaging device 6 consisting of a COD camera is disposed on the upper surface side facing the light source 5. There is. Further, a data processing device includes a signal processor 7 that processes defect information from the image captured by the m-image device 6, and an FA personal computer for fabric inspection that receives the signal of defect information sent via the signal processor 7. 1
8 has been installed. This data processing device! 8 is equipped with a display device 9 consisting of a CRT monitor for displaying defect information, a printer 10 for printing, and a storage medium 11 consisting of a floppy disk for storing information. In addition, in order to remove defects from the sheet material IA, a processing device 12 consisting of a rewinding FA personal computer that sets a storage means (floppy disk) 11 storing defect information and reads out the defect information; IA's rewind Ill! 13, and a controller 14 for controlling the operation of the rewinding device 13 based on the defect information. Next, we will explain the fabric inspection method and defect removal method performed using the above equipment. For example, in a winding process, a sheet material IA in which a large number of thread groups spun from a large number of spinnerets are arranged in parallel on a plane is wound by a winding device 4 through a supply roller 2 and a take-up roller 3. At this time, the upper surface of the traveling sheet material IA is imaged by the imaging device 6 using transmitted light based on irradiation from the light source 5 on the entrance side of the supply roller 2, defects are detected based on the obtained image, and signal processing is performed. The data processor 7 transmits the data as an electrical signal to the data processor 8. The data processor 8 has a built-in program in advance that has the ability to determine defects in the sheet material IA based on quality criteria, and compares the defect information on the sheet material IA obtained by the imaging device 6. Determine the level of defects that should be removed by
Its position and size are stored and displayed as an image on the display device 9 to monitor the traveling sheet-like object IA. Through this monitoring, when it is discovered that a concentrated defect appears at a specific location on the sheet material IA, if the cause is found in the previous process, the cause can be quickly eliminated. The inspection operation of the sheet material IA described above proceeds according to the flowchart shown in FIG. That is, first, before starting production, the brand and product loft number are determined. (step 311). Next, production begins and the sheet material IA begins to run. The defect is detected and received by the imaging device 6 (Step 7" S12), and is output to the printer 10 (Step S13), and the information is stored in the storage medium 11 consisting of a floppy disk (Step S14), at this point If the product lofts are connected in step S15, it becomes possible to receive defect information to repeat the above operation again.When the product lot is finished, it is determined whether the same brand will be produced next (step S15). N16), if production is to continue, the brand and product lot will be updated and inspection operations will be performed.Among the sheet-like products that have been rolled up by a predetermined amount, rolled sheet-like products IB that have defects are The sheet material IB is sent to the rewinding process together with a storage medium 11 such as a floppy disk in which information is stored, and the rolled sheet material IB is set in the rewinding device 13, and the storage medium 11 is set in the processing device 12.Processing device 1
2, the defect level for determining the quality based on the quality criteria is compared with the defect information stored in the storage medium 11, and while the sheet-like material IA is being rewound, a signal indicating the defect position and size is used. In order to remove the defect, the rewinding device 13 is stopped by the controller 14. The defect removal operation of the sheet material IA described above proceeds according to the flowchart shown in FIG. That is, first, a storage medium 11 consisting of a floppy disk in which defect information of the rolled sheet material IB obtained in the previous winding process is stored is set into the processing device 12 consisting of a rewinding FA personal combinator ( Step 321), the rewinding process is started. Rewinding connected to processing device 12! 13 no. Input which winding delay device 1
Input whether to perform rewinding in step 3 (step 822).
). Brand and lot number after rewinding. is input (step 823), and the defect information is read into the processing device 12 (step S24). Here, the level of defect removal by the product is input (step 825), and defects that match the product use are selected. This is because even though it may be considered the same defect, it may be acceptable depending on the purpose for which the sheet material is used. Next, data based on the removal level input signal and defect information is sent to the rewinding device 12 (step 8
26), the rewinding device 12 is stopped at the part where defects need to be removed to perform the work of removing the defects of the sheet material IA (step S27), and when that work is completed, the removal work is continued. (Step S)
28), continue or complete the action. According to the sheet-like material inspection method and its defect removal method of the above embodiment, in the step of producing and winding up 31 sheet-like products, the defect information detected by continuous inspection is memorized and 3! Subsequently, winding can be carried out, and in addition, in the rewinding process, defects can be reliably and efficiently removed based on the defect information, and product quality and production efficiency are greatly improved.

Effects of the Invention As described above, in the sheet-like material inspection method and its defect removal method of the present invention, in the sheet-like material winding process, a tM image is continuously taken by an imaging device and defects are detected from the image. By processing it with a data processing device, defect information on sheet materials that is continuously transmitted, such as defect location and size, can be reliably stored and displayed in real time, making it possible to discover problems in the previous process. ,
It is possible to promptly remove defects, and since all defect information of the wound sheet is stored, defects can be reliably and efficiently removed based on the defect information in the rewinding process. This greatly contributes to improving product quality and production efficiency.

[Brief explanation of the drawing]

FIG. 1 shows a device used in a method for inspecting a sheet material and a method for removing defects thereof according to an embodiment of the present invention. Schematic configuration diagram of
Fig. 2 is a schematic plan view of the main parts of the same device, Fig. 3 is a flowchart of the inspection operation in the same sheet-like object inspection method, and Fig. 4 is a defect removal operation in the same sheet-like object defect removal method. This is a flowchart. IA...sheet-like material, IB...rolled sheet-like material, 5
... light source, 6 ... imaging device 1, 7 ... signal processor,
8...Data processing device, 9...Display device. Agent Yoshihiro Morimoto 1Fl! J Figure 2 - Rice, Makusagi!

Claims (1)

[Claims] 1. In the step of winding up a sheet-like material, a light source and an imaging device are provided, and while the sheet-like material is running, images are continuously taken by the imaging device, and based on the images obtained by this imaging device. detects defects in the sheet-like object, transmits this defect information to a data processing device via a signal processor, stores the defect information by this data processing device, and displays it on a display device. Inspection method for sheet materials. 2. Setting a defect removal level based on the defect information detected and stored based on the image obtained by the imaging device in the sheet-like material winding process, and stopping the operation in the sheet-like material rewinding process. A method for removing defects on a sheet-like article, the method comprising removing defects.