JP2006305426A - Method, apparatus and computer program for application state inspection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inspect the primer application state in the entire circumference of a window glass at high efficiency and high precision. <P>SOLUTION: The application state inspection method is for inspecting the primer application state using a data processing apparatus 100 and digital cameras 300-1 to 300-8 capable of taking images of areas A-1 to A-8 formed by dividing the circumferential rim part of the curved plate-like window glass 10 in an application step of applying a primer along the circumferential rim part of the window glass 10. The data processing apparatus 100 takes image data of the respective areas A-1 to A-8 before primer application by using the digital cameras 300-1 to 300-8; successively takes image data of the areas for which the primer application is completed as proceeding of the application step; and compares the image data after application and the image data before application for the respective areas. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an application state inspection method, apparatus, and computer program suitable for inspecting the application state of a primer, for example, in an application step of applying a primer along the peripheral edge of a window glass.

  When the window glass is attached to the opening of the vehicle body, an adhesive is applied along the peripheral edge of the window glass. In this case, a primer is applied along the peripheral edge of the window glass as a pre-process for applying the adhesive.

  Usually, a primer application robot is used for applying the primer, and a brush is used as an applicator. However, it may be difficult to maintain a uniform contact area between the brush and the window glass due to drying and solidification of the primer adhering to the brush and removal of the brush. Further, there are individual differences in the window glass having a curved plate shape, and it may be difficult to uniformly supply the primer to each part of the contact location. Therefore, primer coating unevenness and fading may occur, and it is necessary to inspect whether the primer is uniformly applied.

  For example, Patent Document 1 proposes a method of inspecting the primer application state using a CCD camera, and images of the window glass are photographed by four CCD cameras, and the images are copied to a monitor for work. A worker visually inspects the application state of the primer. However, when the operator visually inspects the primer application state, not only does the inspection accuracy vary depending on the operator's experience and skill level, but the burden on the worker is also great, and human errors due to habituation, fatigue, etc. It can happen.

  On the other hand, in Patent Document 2, the pre-application image and the post-application image of the primer are captured by an optical camera, the change in brightness corresponding to the primer application area is detected from these images, and the detected change is detected. It has been proposed to determine whether the application state is good or not by comparing the divided area and the reference change area.

JP-A-8-10683 Japanese Patent Laid-Open No. 7-5118

  However, both Patent Documents 1 and 2 disclose that the application state of a primer is inspected using a camera, but no more specific method is proposed.

  For example, in Patent Document 1, four CCD cameras are arranged above the window glass (FIG. 4 of Patent Document 1), and thus, what part of the window glass is imaged in what procedure is disclosed at all. It has not been.

  Moreover, in patent document 2, although the image which imaged a part of peripheral part of window glass is disclosed (FIGS. 8-10 of patent document 2), it is test | inspected about the perimeter of the peripheral part of window glass. There is no disclosure about what to do.

  Furthermore, Patent Document 2 compares the detection change area and the reference change area with the entire image as the inspection field, and there is uneven coating of the primer in the inspection field, and the part where the primer is applied broadly In the case where there is a mixture of narrowly coated parts, they may be offset, and the entire inspection field may not be different from the reference change area, which may prevent accurate inspection. There is. This has a larger effect as the inspection visual field becomes wider, and in extreme cases, when the entire window glass is acquired as one inspection image as the inspection visual field, the inspection accuracy becomes very low. On the other hand, narrowing the visual field inspection increases the inspection accuracy, but in order to inspect the entire periphery of the peripheral portion of the window glass, it is necessary to acquire a large number of images. Will get worse.

  The present invention has been made in view of the above points, and in a coating process or the like for applying a primer along the peripheral edge of the window glass, the application state inspection of the primer on the entire circumference of the window glass is efficiently performed, and The object is to be able to perform with high accuracy.

The application state inspection method according to the present invention uses an information processing device and an imaging unit capable of imaging the peripheral part of the glass member in a plurality of areas in an application process in which an application material is applied along the peripheral part of the glass member. An application state inspection method for inspecting the application state of the application material, wherein the information processing apparatus acquires image information of each area before applying the application material using the imaging means. Image information acquisition procedure and post-application image information acquisition procedure in which the information processing apparatus sequentially acquires image information of areas where application of the coating material has been completed using the imaging unit as the application process proceeds And the information processing apparatus, for each area, the post-application image information acquired by the post-application image information acquisition procedure, and the pre-application image information acquired by the pre-application image information acquisition procedure And having a comparison procedure which compare.
An application state inspection device according to the present invention is an application state inspection device that inspects the application state of the coating material in an application step of applying an application material along the periphery of the glass member, and the peripheral part of the glass member is Image information acquisition before application for acquiring image information of each area before applying the coating material using a plurality of imaging devices dedicated to imaging each divided area and the plurality of imaging devices For each area, a post-application image information acquisition unit that sequentially acquires image information of areas where the application of the application material has been completed using the plurality of imaging devices as the application process proceeds. Comparing means for comparing the post-application image information acquired by the post-application image information acquisition means with the pre-application image information acquired by the pre-application image information acquisition means is provided.
A computer program according to the present invention is a computer program for inspecting an application state of the coating material in a coating process in which a coating material is applied along the peripheral edge of the glass member, Using the imaging means capable of imaging in divided areas, pre-application image information acquisition processing for acquiring image information of each area before applying the coating material, and as the application process proceeds, the imaging means And using the post-application image information acquisition process for sequentially acquiring the image information of the areas where the application of the application material has been completed, the post-application image information acquisition process for each area, and the application A comparison process for comparing the pre-application image information acquired by the previous image information acquisition process is executed by a computer.

  According to the present invention, image information of areas where application of the coating material has been completed is sequentially acquired as the application process progresses using an imaging unit capable of imaging the peripheral portion of the glass member into a plurality of areas. Since the post-application image information and the pre-application image information are compared for each area, in the application step of applying the coating agent along the peripheral edge of the glass member, the coating material on the entire circumference of the glass member The application state inspection can be performed efficiently and with high accuracy.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an overall configuration of a primer coating system including a primer coating state inspection apparatus according to the present embodiment. Eight digital cameras 300-1 to 300-8 (hereinafter also referred to as “camera 1 to camera 8”) are connected to the information processing apparatus 100 via the camera power supply unit 200. The digital cameras 300-1 to 300-8 employ a CCD as an image sensor, for example. As will be described in detail later, the information processing apparatus 100 acquires image data from each of the digital cameras 300-1 to 300-8, performs image processing, and inspects the primer application state.

  A production management system 600 that performs production management is connected to the information processing apparatus 100 via a sequencer 500. The sequencer 500 controls the operation sequence of the primer application robot 400. The information processing apparatus 100 can acquire information for determining the type of window glass such as a model number from the production management system 600.

  FIG. 2 is a diagram showing a primer application station in which the primer application robot 400 and the digital cameras 300-1 to 300-8 are installed. As shown in the figure, the window glass 10 (front glass or rear glass) is conveyed to the primer application station by the conveying device 51. The window glass 10 has a plate shape that is generally curved in the longitudinal direction, although the shape is different for each vehicle type.

  The position of the window glass 10 conveyed to the primer application station is adjusted (centering) by the position adjusting device 54, and the primer is applied by the primer application robot 400 in that state.

  As shown in FIG. 3, a black ceramic coating layer 11 for concealing a bonding portion with the vehicle body is provided at a peripheral portion of the window glass 10 with a predetermined width, and a primer is applied on the ceramic coating layer 11. Is done.

  A fluorescent lamp 52 is disposed above the primer application station. The fluorescent lamp 52 serves as a light source for imaging by the digital cameras 300-1 to 300-8. In this case, in order to irradiate the entire surface of the window glass 10 with light uniformly and prevent the fluorescent lamp 52 from being reflected on the window glass 10, an illumination cover 53 made of a white acrylic plate so as to cover the lower portion of the fluorescent lamp 52. Is installed. The size of the illumination cover 53 is preferably larger than the size of the window glass 10.

  In addition, eight digital cameras 300-1 to 300-8 are arranged around the fluorescent lamp 52 in the upper part of the primer application station. In the present embodiment, as shown in FIG. 3, the peripheral portion of the window glass 10 is divided into eight areas A-1 to A-8, and these areas A-1 to A-8 are divided into digital cameras 300-1 to 300-300. -8 images each. That is, only the digital cameras 300-1, 300-2, and 300-8 are shown in FIG. 2, but the digital camera 300-5 is located on the back side of the digital camera 300-1, and the digital camera 300-2 is located on the back side. The digital cameras 300-3 and 300-4 are arranged on the side, and the digital cameras 300-7 and 300-6 are arranged on the back side of the paper surface of the digital camera 300-8, respectively. When imaging eight areas A-1 to A-8, adjacent areas (in other words, imaging ranges of adjacent digital cameras) overlap in order to capture the entire circumference of the peripheral edge of the window glass 10 without omission. I am doing so.

  Here, since the window glass 10 has a curved plate shape as described above, when the image is taken from above vertically, the primer application portion is imaged narrowly at the short side end portion of the window glass 10 having a large degree of curvature. Will be. As will be described later, since the application state is inspected by determining the area of the primer application part, if the primer application part is imaged narrowly, the inspection accuracy is inferior.

  Therefore, as shown in FIG. 4, the mounting angle of each digital camera 300-1 to 300-8 is adjusted according to the curvature of the window glass 10, respectively, and each digital camera 300-1 to 300-8 takes an image. Opposite to the area, that is, the imaging direction is substantially perpendicular to the area to be imaged (substantially perpendicular to the glass surface near the short side edge of the window glass 10). The information processing apparatus 100 may automatically adjust the mounting angles of the digital cameras 300-1 to 300-8 according to the type of window glass. Note that the direction of the lens barrel 301 may be tilted instead of tilting the mounting angle of the camera itself.

  FIG. 5 shows a functional configuration of the information processing apparatus 100 that functions as a primer application state inspection apparatus. An image display device 108 such as a liquid crystal display and an input device 109 such as a keyboard and a mouse are connected to the information processing device 100.

  In the information processing apparatus 100, reference numeral 101 denotes a pre-application image data acquisition unit, which uses the digital cameras 300-1 to 300-8 to apply pre-application image data of each area A-1 to A-8 before applying the primer. To get.

  Reference numeral 102 denotes a post-application image data acquisition unit. As the primer application process progresses, the digital camera 300-1 to 300-8 is used to complete the application of the primer (in other words, the primer application robot 400). The post-application image data of the area through which the arm has passed is sequentially acquired. In the example shown in FIG. 3, primer application starts from the right side of the area A-1 in the figure, and the order of areas A-1, A-2, A-3,..., A-7, A-8. The primer is applied (arrow X in the figure). The post-application image data acquisition unit 102 outputs an imaging instruction to the digital camera A-1 (camera 1) that images the area A-1 when the application of the primer in the area A-1 is completed. Obtain post-application image data from -1. Thereafter, similarly, as the primer coating process progresses, the digital cameras 300-2, 300-3,..., 300-7, 300-8, and the areas A-2, A-3,. The image data after application of -7 and A-8 is acquired sequentially.

  Reference numeral 103 denotes a difference analysis unit, and the post-application image data acquired by the post-application image data acquisition unit 102 and the pre-application image data acquired by the pre-application image data acquisition unit 101 for each of the areas A-1 to A-8. A difference analysis with the data is performed, and a portion with a luminance change is extracted. As a result, as shown in FIG. 6, a difference image is generated, and only a portion where the luminance has changed due to the application of the primer 12 appears in a band shape.

  Reference numeral 104 denotes a dividing unit that further divides each captured area into a plurality of inspection regions 13 and sets in advance from the difference images (see FIG. 6) generated by the difference analysis unit 103 in each inspection region 13. The primer application portion is detected with reference to the threshold value. FIG. 7 is a diagram showing a state in which a plurality of inspection regions 13 are displayed superimposed on the image after application in area A-1 imaged by the camera 300-1 (camera 1). In the present embodiment, as shown in FIG. 7, the inspection region 13 is equally divided in the primer application direction, and has a rectangular shape having a length l wider than the width of the ceramic coating layer 11 and an appropriate width h. It has become. The position, width l, and length h of the inspection area 13 can be arbitrarily set, for example, registered in advance for each type of window glass. Further, a threshold for detecting the primer application portion may be arbitrarily set.

An area comparison unit 105 compares the area of the primer application part detected from the difference image with a preset reference application area for each inspection region 13. The standard application area is the following formula (1)
Reference application area = reference application width l ′ × inspection area width h (1)
(See FIG. 8). The primer application ratio [%] is expressed by the following formula (2)
Primer application ratio = (area of detected primer application part / reference application area) × 100 (2)
Calculate as

  The reference application area may be numerically given to the information processing apparatus 100 from the outside and set and registered for each type of window glass. For example, the reference application area may be a tape-shaped reference application width l ′ previously set on the window glass. In a state where a marker (paper or the like) is placed, the digital camera 300-1 to 300-8 is used to capture an image and measure the reference coating width l ′ from the captured image data (for example, the number of pixels) ) To register the settings.

  Reference numeral 106 denotes a determination unit, which determines application failure when the result of the area comparison unit 105 is not within a preset range. For example, when the primer application ratio [%] is less than a faint / insufficient / unapplied determination threshold value (for example, 70 [%]) or an excessive application (extrusion) determination threshold value (for example, 300 [%]) is set. When exceeding, it determines with application | coating defect.

  For example, in the area A-1 shown in FIG. 9, the area comparison and determination are sequentially performed from the left inspection region 13, the third and fourth inspection regions 13 from the left, and the seventh and eighth inspections from the left. Assume that it is determined that there is a primer shortage or blur in the area 13. In this way, the inspection area 13 in which the application failure has occurred is stored as an abnormal area 14.

  Reference numeral 107 denotes a display control unit. As shown in FIG. 10, the post-application images of the areas A-1 to A-8 acquired by the post-application image data acquisition unit 102 are displayed together with the determination results by the determination unit 106. They are displayed side by side on the device 108. Specifically, when post-application image data for a certain area is acquired, the post-application image is displayed on the image display device 108. Then, the comparison and determination of the areas of all the inspection regions 13 in each of the areas A-1 to A-8 is completed, and if there is an abnormal region 14, the abnormal region 14 is displayed on the post-application image. In the illustrated example, application failure is determined in area A-1, and the abnormal region 14 is displayed on the post-application image.

  In this way, the images after application in all the areas A-1 to A-8 are displayed side by side, and when there is an abnormal region in any area, for example, a message 15 “abnormal” is displayed. In addition, when arranging the images after application, if the images are arranged in the same manner as the arrangement of the digital cameras 300-1 to 300-8 (areas A-1 to A-8), as shown in FIG. Is reproduced, the operator can confirm at a glance where the coating failure occurred on the window glass 10.

  Hereinafter, a primer coating process including a coating state inspection process will be described with reference to the flowcharts of FIGS.

  As shown in FIG. 11, when the preparation of the workpiece (window glass 10) is completed at the primer application station (step S <b> 1101), the information processing apparatus 100 acquires the model number from the production management system 600 and acquires the window glass 10. Is determined (step S1102), and a reference application width l ′ preset for the window glass 10 is read from the storage area (step S1103).

  Further, the information processing apparatus 100 responds to the pre-application trigger output from the sequencer 500 (step S1104) and uses the digital cameras 300-1 to 300-8 to each area A-1 before applying the primer. The pre-application image data of A-8 is acquired (step S1105). In this case, it is not necessary to sequentially image each of the areas A-1 to A-8, and all the areas A-1 to A-8 may be imaged simultaneously in order to reduce time. If necessary, the pre-application images of the areas A-1 to A-8 may be displayed side by side on the image display device 108, as shown in FIG.

  Then, when the primer application is started and the post-application trigger output from the sequencer 500 is received, that is, when the primer application in the area A-1 is completed, the information processing apparatus 100 displays the area A-1. An imaging instruction is output to the digital camera A-1 (camera 1) for imaging, and after-application image data is acquired from the digital camera A-1, and an after-application image in the area A-1 is displayed on the image display device 108. When the pre-application images of the areas A-1 to A-8 are displayed side by side on the image display device 108 in step S1105, for example, the pre-application images of the area A-1 that have already been displayed are replaced. Thus, the post-application image of area A-1 acquired this time may be displayed (steps S1106 to S1108).

  Thereafter, similarly, as the primer coating process progresses, the digital cameras 300-2, 300-3,..., 300-7, 300-8, and the areas A-2, A-3,. -7, A-8 image data after application are sequentially acquired and images after application of areas A-2, A-3, ..., A-7, A-8 are sequentially displayed on the image display device 108. (Steps S1106 to S1108).

  After the post-application image data of all the areas A-1 to A-8 is acquired in steps S1106 to S1108, the post-application image data of the area A-1 and the pre-application image data acquisition unit 101 have already been acquired. The pre-application image data of the area A-1 is read (steps S1109 and S1110), and difference analysis is performed to generate a difference image (step S1111). Also, inspection area data (information such as length l and width h) preset for the window glass 10 is read from the storage area (step S1112).

  Subsequently, the process proceeds to a primer application state inspection process (step S1113). FIG. 12 shows details of the primer application state inspection process. First, the number k of inspection areas is acquired (step S1201), and an abnormal area is initialized (step S1202).

  Next, the camera 1 inspection result flag is set to “OK” (step S1203), and in each of the k inspection regions 13 (step S1204), a reference application area is calculated based on the above equation (1) ( In step S1205), the primer application portion is detected and the area is calculated (step S1206).

  Then, the primer application ratio [%] is calculated based on the above equation (2) (step S1207). When the primer application ratio [%] is less than the threshold value for blurring / insufficient / unapplied or excessive application (excess) ) When the determination threshold is exceeded, it is determined that the application is defective (step S1208). If it is determined that the application is not defective, the primer application state inspection is terminated. If it is determined that the application is defective, the flag of the camera 1 inspection result is set to “NG” (step S1209) and the inspection is performed as an abnormal region 14. Region j is added (step S1210).

  Returning to FIG. 11, it is determined whether the flag of the camera 1 inspection result is “OK” or “NG” in the primer application state inspection in step S1113 (step S1114). The abnormal region 14 is displayed so as to overlap the post-application image (step S1115).

  Thereafter, similarly, the processes in steps S1110 to S1115 are repeated for the post-application image data in areas A-2, A-3,..., A-7, A-8 (step S1109).

  If the processing of steps S1109 to S1115 is performed, the inspection result recording file is saved (step S1116), the inspection result is determined (step S1117), and if all the camera i inspection result flags are “OK”. If so, a message such as “no abnormality” is displayed on the screen (step S1118). On the other hand, if any camera i inspection result flag is “NG”, as shown in FIG. 10, a message such as “abnormal” is displayed on the screen (step S1119). In this way, not only the abnormal area 14 is displayed at the location of the application failure, but also by displaying a message such as “abnormal” separately, the operator can easily recognize that there was an application failure. .

  Further, the pre-application image data and the post-application image data of the areas A-1 to A-8 by all the cameras 1 to 8 are compressed and stored in, for example, the JPEG format (step S1120).

  As described above, the post-application image data of the areas where the primer application has been completed is sequentially obtained, and the post-application image data and the pre-application image data are compared for each area. The primer application state inspection can be performed efficiently and with high accuracy.

  Further, since the image after application of the area is acquired immediately after the primer application is completed, the image before the primer drying can be handled as the image after application. In most cases, since the luminance change on the ceramic coating layer 11 is larger before the primer drying than after the primer drying, the accuracy of the differential analysis can be improved.

  Further, since the peripheral portion of the window glass 10 is divided into eight areas A-1 to A-8, even when the portion where the primer is applied broadly and the portion where the primer is applied narrowly are mixed. The possibility that they are located in the same area can be reduced, and the possibility of erroneous determination that there is no application failure can be reduced. In particular, since each imaged area is further divided into a plurality of inspection regions 13, it is possible to perform the application state inspection with higher accuracy without increasing the number of digital cameras.

  As mentioned above, although this invention was demonstrated with various embodiment, this invention is not limited only to these embodiment, A change etc. are possible within the scope of the present invention. For example, in the above embodiment, after the image data after application for all the areas A-1 to A-8 is acquired, the image data after application and the image data before application for each area A-1 to A-8 are obtained. Although the comparison process is started, if the information processing apparatus 100 is capable of high-speed processing, the image data after application in the areas A-1,... It is possible to further reduce the entire processing time by performing a comparison process between the acquired image data of the acquired area and the pre-application image data of the area already acquired each time it is acquired. Become. In this case, if the “acquisition process / comparison process time” is longer than the “primer application time in one area”, the acquisition process of the post-application image data and the comparison process are performed in parallel. If the “acquisition process / comparison process time” is shorter than the “primer application time in one area”, the primer application in the next area is completed when the acquisition process of the post-application image data and the comparison process are completed. Will wait until.

  The information processing apparatus 100 functioning as a primer application state inspection apparatus is specifically configured by a computer system including a CPU, a ROM, a RAM, and the like. In the illustrated example, one computer apparatus is shown to function as the information processing apparatus 100. However, a plurality of computer apparatuses may function as the information processing apparatus 100 in combination.

  The functions of the above-described embodiments can also be realized by a computer executing a computer program. Means for supplying a computer program to a computer, for example, a computer-readable recording medium such as a CD-ROM in which such a program is recorded, or a transmission medium such as the Internet for transmitting such a program can also be applied as an embodiment of the present invention. it can. A computer program product such as a computer-readable recording medium in which the above program is recorded can also be applied as an embodiment of the present invention. The above computer program, recording medium, transmission medium, and computer program product are included in the scope of the present invention. As the recording medium, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a magnetic tape, a nonvolatile memory, a ROM, or the like can be used.

1 is a diagram illustrating an overall configuration of a primer coating system including a primer coating state inspection apparatus according to an embodiment. It is a figure which shows a primer application station. It is a figure which shows the relationship between a window glass and an area. It is a figure which shows the relationship between a digital camera and a window glass. It is a figure which shows the function structure of the information processing apparatus which functions as an application | coating state test | inspection apparatus of a primer. It is a figure which shows a mode that a difference image is produced | generated by the image data after application | coating, and the image data before application | coating. It is a figure which shows the state which overlapped and displayed the some test | inspection area | region on the image after application | coating imaged with the camera. It is a figure which shows the relationship between the area of the primer application | coating detection part in a certain test | inspection area | region, and a reference | standard application area. It is a figure which shows an example of the difference image and the image after application | coating in the area where there was an application defect. It is a figure which shows the example of a display on an image display apparatus. It is a flowchart for demonstrating the application | coating process of a primer including a coating state inspection process. It is a flowchart for demonstrating a coating state inspection process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Information processing apparatus 200 Camera power supply unit 300 Digital camera 400 Primer coating robot 500 Sequencer 600 Production management system 101 Pre-application image data acquisition unit 102 Post-application image data acquisition unit 103 Difference analysis unit 104 Division unit 105 Area comparison unit 106 Determination unit 107 Display control unit 108 Image display device 109 Input device

Claims (14)

In the coating process of applying the coating material along the peripheral edge of the glass member, the application state of the coating material is determined using an information processing device and an imaging unit capable of imaging the peripheral edge of the glass member in a plurality of areas. An application state inspection method for inspecting,
The information processing apparatus uses the imaging means to acquire pre-application image information acquisition procedures for acquiring image information of each area before applying the application material;
A post-application image information acquisition procedure in which the information processing apparatus sequentially acquires image information of areas where the application of the application material has been completed using the imaging unit as the application process proceeds.
For each area, the information processing apparatus includes a comparison procedure for comparing the post-application image information acquired by the post-application image information acquisition procedure with the pre-application image information acquired by the pre-application image information acquisition procedure. An application state inspection method comprising:   In the comparison procedure, the information processing apparatus is already acquired by the post-application image information and the pre-application image information acquisition procedure each time the post-application image information acquisition procedure obtains the post-application image information of the area. 2. The application state inspection method according to claim 1, wherein the pre-application image information of the area is sequentially compared.   The coating state inspection method according to claim 1, wherein the imaging unit is configured by a plurality of imaging devices that specially capture each area. The comparison procedure is:
For each area, the difference between the post-application image information acquired by the post-application image information acquisition procedure and the pre-application image information acquired by the pre-application image information acquisition procedure is analyzed, and a portion with a luminance change is extracted. Differential analysis procedure to
An area comparison procedure for comparing the area of the primer application portion detected from the difference image generated by the difference analysis procedure with a preset reference application area;
4. The application state inspection method according to claim 1, further comprising a determination procedure for determining that the application is defective when a result of the area comparison procedure is not within a preset range. 5.   5. The comparison procedure according to claim 4, wherein the comparison procedure further includes a division procedure for further dividing the imaged area into a plurality of inspection regions, and the area comparison procedure performs area comparison for each inspection region. Coating state inspection method.   6. The method according to claim 1, further comprising a step of displaying the post-application images of each area acquired by the post-application image information acquisition procedure together with a comparison result of the comparison procedure on an image display device. The coating state inspection method according to item.   The coating state inspection method according to claim 1, wherein the glass member is a window glass of an automobile. In an application step of applying an application material along the peripheral edge of the glass member, an application state inspection device for inspecting the application state of the application material,
A plurality of image pickup devices for individually imaging each area obtained by dividing the peripheral portion of the glass member into a plurality of areas;
Using the plurality of imaging devices, pre-application image information acquisition means for acquiring image information of each area before applying the application material;
A post-application image information acquisition unit that sequentially acquires image information of areas where the application of the application material has been completed using the plurality of imaging devices as the application process proceeds.
Comparing means for comparing the post-application image information acquired by the post-application image information acquisition means with the pre-application image information acquired by the pre-application image information acquisition means for each area Application state inspection device.   Each time the comparison means obtains post-application image information of the area by the post-application image information acquisition means, the post-application image information and the pre-application of the area already acquired by the pre-application image information acquisition means. The application state inspection apparatus according to claim 8, wherein image information is sequentially compared. The comparison means includes
For each area, a difference analysis is performed between the post-application image information acquired by the post-application image information acquisition unit and the pre-application image information acquisition unit acquired by the pre-application image information acquisition unit, and a portion having a luminance change is extracted. Differential analysis means to
An area comparison means for comparing the area of the primer application portion detected from the difference image generated by the difference analysis means with a preset reference application area;
10. The application state inspection apparatus according to claim 8, further comprising a determination unit that determines that the application is defective when a result of the area comparison unit is not within a preset range.   The glass member has a curved plate shape, and the imaging direction of each of the imaging devices is adjusted in accordance with the curvature of the glass member. Application state inspection device. In a coating process of coating a coating material along a peripheral edge of a glass member, a computer program for inspecting a coating state of the coating material,
Pre-application image information acquisition processing for acquiring image information of each area before applying the coating material, using an imaging means capable of imaging the peripheral portion of the glass member into a plurality of areas;
A post-application image information acquisition process for sequentially acquiring image information of areas where the application of the application material has been completed, using the imaging unit as the application process proceeds.
For each area, causing the computer to execute a comparison process for comparing the post-application image information acquired by the post-application image information acquisition process and the pre-application image information acquired by the pre-application image information acquisition process. A featured computer program.   In the comparison process, each time post-application image information of the area is obtained by the post-application image information acquisition process, the post-application image information and the pre-application of the area already acquired by the pre-application image information acquisition process The computer program according to claim 12, wherein image information is sequentially compared. The comparison process includes
For each area, a difference analysis between the post-application image information acquired by the post-application image information acquisition process and the pre-application image information acquired by the pre-application image information acquisition process is performed, and a portion having a luminance change is extracted. Differential analysis processing to
An area comparison process for comparing the area of the primer application portion detected from the difference image generated by the difference analysis process with a preset reference application area;
14. The computer program according to claim 12, further comprising a determination process for determining a coating failure when a result of the area comparison process is not within a preset range.

Images