JP2013096878A - Light quantity setting method of coaxial episcopic illumination and position deviation inspection method of label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light quantity setting method with which, when optically inspecting position deviation or the like of a label deposited on a product, even in the case where the inspection is to be performed with a production lot having a different label print pattern or product color or material, an illumination level can be easily and appropriately set.SOLUTION: Light is radiated in a coaxial direction with a lens of a camera 21 by a coaxial episcopic illumination 22, and the state of depositing a label 12 deposited on a tape cartridge 11 is detected by the camera 21. A light quantity setting section 25 gradually increases a light quantity level of the coaxial episcopic illumination 22 from low light quantity level to high light quantity level, detects two edges generated by an outer edge of the label 12 and an edge of a shallow channel and, when the two edges cannot be determined any more in all portions, multiplies the quantity of light at that time by an experiment coefficient of 1 or less, thereby setting the optimal quantity of light of the coaxial episcopic illumination 22.

Description

  The present invention relates to a method for setting the amount of light for coaxial epi-illumination and an inspection method for positional deviation of a label in an image recognition apparatus that simultaneously recognizes two mutually related edges.

Conventionally, as a light amount setting method of this type of coaxial epi-illumination, a method that is performed in product inspection or the like and appropriately sets an illumination level in an image recognition apparatus is known (see Patent Documents 1 and 2).
As a method for appropriately setting the illumination level when performing an optical inspection, for example, the method disclosed in Patent Document 1 changes the illumination level step by step, measures the line width at each step of the illumination level, and The width, the illumination level when the line width is measured, the maximum luminance and the minimum luminance are stored in the memory, and the stable range of the line width measurement is detected based on the stored measurement value, and the luminance range of the video signal is set. It is like that.
In Patent Document 2, the amount of received light is calculated from an image signal from a camera, the calculation result is compared with a reference value stored in a memory, and the amount of light is set based on the comparison result. .

JP 2010-175324 A JP-A-9-189522

  By the way, a label to be attached to a product has various printing patterns corresponding to the product type, and products have various colors and materials. At the production site, such labels with different print patterns and product lots with different colors and materials are inspected. On the other hand, the appropriate illumination level for inspecting the positional deviation of the label by an optical method varies depending on the print pattern of the label, the color, material, etc. of the product. For this reason, in the production site, it is necessary to change the appropriate illumination level every time the product lot changes.

  In the technique disclosed in Patent Document 1, the line width, the illumination level when the line width is measured, the maximum brightness, and the minimum brightness are stored in the memory while changing the illumination level step by step, and then the illumination level is set. To do. For this reason, it took time to set the illumination level, and there was a problem that it was not possible to flexibly cope with changes in the label printing pattern, product color, material, and the like. Moreover, in what is shown by patent document 2, since the light quantity is set compared with the received light quantity and the reference value from the image signal from the camera, the reference value must be changed every time the product lot changes. There is a problem that the setting becomes complicated.

  The present invention provides a coaxial epi-illumination that can easily and appropriately set an illumination level for image recognition of the first edge and the second edge in accordance with the properties of the alignment target member and the alignment member. It is an object to provide a light amount setting method and a label displacement inspection method.

  According to the present invention, the method for setting the amount of light for coaxial incident illumination recognizes an image of the first edge of the alignment member and the second edge of the alignment member aligned with the first edge with a predetermined allowable gap width. A method of setting the amount of light for coaxial epi-illumination in the image recognition apparatus, the continuous recognition step of continuing image recognition of the first edge and the second edge while increasing the amount of light of the coaxial epi-illumination from a low level to a high level; In the process of increasing the amount of light, an impossible level acquisition step for acquiring an impossible amount of light level when individual image recognition of the first edge and the second edge becomes impossible, and an impossible value level multiplied by an experimental value coefficient of 1 or less And an appropriate light level calculation step for obtaining an appropriate light amount level, and a light amount setting step for setting the light amount of the coaxial incident illumination to the appropriate light amount level.

  According to this configuration, the appropriate light quantity level is obtained by multiplying the impossible light quantity level when the individual image recognition of the first edge and the second edge is impossible with the experimental value coefficient. For this reason, if the experimental value coefficient is determined in consideration of the properties of the member to be aligned and the properties of the alignment member, it is possible to easily set an appropriate illumination level for image recognition of the first edge and the second edge. Can do. That is, the light intensity level of the coaxial epi-illumination can be set easily and appropriately in accordance with the properties of the member to be aligned and the properties of the alignment member.

  In this case, the experimental value coefficient is preferably 0.65 to 0.75.

  According to this configuration, for example, when the member to be aligned is a cartridge and the alignment member is a label attached to the cartridge, the illumination level is set according to the background color and print pattern of the label, the color and material of the cartridge, and the like. It can be set easily and appropriately. In the above example, it is more preferable to set the experimental value coefficient to 0.7.

  Further, in the continuous recognition step, image recognition of the first edge and the second edge is performed for a plurality of locations, and in the impossibility level acquisition step, when the image recognition is impossible for at least one of the plurality of locations, the impossible light amount level It is preferable to obtain

  According to this configuration, the illumination level can be set appropriately even when there are places unsuitable for detection at the first edge and the second edge, and the reliability of light amount setting can be improved.

  Furthermore, the alignment member is a label, the second edge is the edge of the label, the aligned member is a cartridge to which the label is attached, and the first edge is a shallow groove to which the label is attached. It is preferable that the edge is.

  According to this configuration, since the illumination level can be appropriately set in relation to the label and the cartridge to which it is attached, it is possible to accurately determine the positional deviation of the label attached to the cartridge.

  The coaxial epi-illumination is preferably coaxial surface-emitting epi-illumination.

  According to this configuration, it is possible to optimally set the light amount of the regular reflection image of the label attached to the cartridge, and to obtain sufficient contrast at the edges (edges) of the label. The positional deviation or the like of the label to be worn can be determined with high accuracy.

  The positional deviation detection method of the present invention is a label positional deviation inspection method performed using the image recognition apparatus having the coaxial epi-illumination set by the light quantity setting method while performing the above-described coaxial epi-illumination light quantity setting method. Then, after the light amount setting step, when the image recognition step for recognizing the first edge and the second edge, and as a result of the image recognition, the gap width between the first edge and the second edge is out of the allowable gap width. And a determination step for determining that there is a label sticking failure.

  According to this configuration, it is possible to detect the positional deviation of the label attached to the cartridge easily and accurately.

  In this case, it is preferable to implement the light amount setting method when the label type is changed and when the cartridge model is changed.

  According to this configuration, when changing the label type or cartridge model, the amount of light can be set optimally to detect label misalignment, achieving both detection accuracy and tact time reduction during detection. can do.

  In addition, in the continuous recognition process of the light quantity setting method, the determination process is also performed, and when it is determined that the sticking is defective by the determination process, the impossibility level acquisition process, the aptitude level calculation process, and the light quantity setting process are stopped. However, it is preferable to carry out the light amount setting method for the next inspection object which is the same kind of label and the same kind of cartridge.

  According to this configuration, the optimum setting of the light amount level and the detection of the positional deviation of the label with respect to the cartridge can be performed as a series of operations, and the tact time can be shortened.

It is a perspective view which shows the external appearance of the tape cartridge used with the positional offset inspection method of the label concerning the 1st Embodiment of this invention. It is a perspective view for demonstrating the process when sticking a label on a tape cartridge. It is a block diagram which shows the outline | summary of the label position shift inspection apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the position shift detection in the label position shift inspection apparatus which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process in the light quantity setting part in the label position shift inspection apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing at the time of implement | achieving the positional deviation test | inspection method of the label which concerns on the 1st Embodiment of this invention at the production process of a tape cartridge. It is a flowchart used for description of a process in the case of performing position shift detection using two optical systems sequentially.

  Hereinafter, with reference to the attached drawings, a light amount setting method and a label displacement inspection method for coaxial epi-illumination according to an embodiment of the present invention will be described. The coaxial incident illumination light amount setting method and the label displacement inspection method are carried out in a series of work steps in which a label is attached to a tape cartridge, the displacement of the label is detected, and shipped as a product. .

  FIG. 1 shows an external appearance of a tape cartridge 11 used in the positional deviation inspection method for the label 12. The tape cartridge 11 is used by being mounted on a label printing apparatus that prints characters and the like with a thermal head. Although not shown, the tape cartridge 11 contains a printing tape, an ink ribbon, and a platen. When the tape cartridge 11 is mounted on the label printing apparatus, the printing tape and the ink ribbon are overlapped in the tape cartridge 11, the ink applied to the ink ribbon by the thermal head is melted by heat, and information is stored on the printing tape. Thermally transferred.

  When such a tape cartridge 11 is commercialized and sold, a label 12 for displaying information such as a manufacturer name, a type of printing tape, and quality is attached to the tape cartridge 11.

  FIG. 2 shows a process for sticking the label 12 to the tape cartridge 11. As shown in FIG. 2A, a shallow groove 15 is disposed in the casing of the tape cartridge 11 (formed by joining the upper case and the lower case) so as to surround the upper surface and the left and right side surfaces. . The shape of the shallow groove 15 corresponds to the label 12, and the size thereof is slightly larger than the label 12 in width and length. When the label 12 is attached to the tape cartridge 11, the label 12 is disposed facing the shallow groove 15 on the upper surface of the tape cartridge 11 as shown in FIG. In this case, an adhesive is applied to the back surface of the label 12, and the label 12 is pressed and stuck in the shallow groove 15 on the upper surface of the tape cartridge 11. Next, as shown in FIG. 2B, both ends of the label 12 are bent along both side surfaces of the tape cartridge 11, pressed against both side surfaces of the tape cartridge 11, and stuck in the shallow groove 15. The

  As described above, when the label 12 is attached to the tape cartridge 11, the positional deviation inspection of the label 12 is performed. That is, the positional deviation inspection of the label 12 is performed using the label 12 as an alignment member and the tape cartridge 11 as an alignment member. The positional deviation inspection of the label 12 is performed by an optical method in which the attached state of the label 12 is photographed by the camera 21 and the photographed image is recognized. As a result of the inspection, the label 12 that is misaligned is discharged as a defective product.

Next, the positional deviation inspection method for the label 12 according to the first embodiment of the present invention will be described in detail.
FIG. 3 shows an outline of the positional deviation inspection apparatus for the label 12. In FIG. 3, the camera 21 captures the result of attaching the label 12 attached on the tape cartridge 11. Specifically, the edge of the shallow groove 15 and the edge of the label 12 facing the shallow groove 15 are imaged at a plurality of locations.

A coaxial epi-illumination 22 is provided between the camera 21 and the tape cartridge 11. As the coaxial epi-illumination 22, for example, a surface emitting LED (Light
A coaxial surface-emitting epi-illumination is used in which a half mirror is placed in a lens barrel and light is reflected along the lens optical axis, using an Emitting Diode) as a light source. The coaxial epi-illumination 22 emits light from the same axis as the lens of the camera 21. Thereby, from the camera 21, the regular reflection image of the sticking state of the label 12 stuck on the tape cartridge 11 is obtained.

  An imaging signal of the camera 21 is sent to the camera control unit 23. The camera control unit 23 controls a synchronization signal for the camera 21 and processes an imaging signal from the camera 21. The output of the camera control unit 23 is sent to the pass / fail determination unit 24 and to the light amount setting unit 25. The quality determination unit 24 recognizes the captured image of the camera 21 sent via the camera control unit 23 and determines the quality of the label attaching position. The light quantity setting unit 25 controls the light quantity of the coaxial incident illumination 22 based on the captured image of the camera 21 sent via the camera control unit 23. The “image recognition device” described in the claims includes a camera 21, a coaxial epi-illumination 22, a camera control unit 23, a quality determination unit 24, and a light amount setting unit 25. Further, in the drawing, a moving mechanism for moving the tape cartridge 11 is omitted in order to image the pasting result of the label 12 over a plurality of locations.

  Next, processing in the pass / fail determination unit 24 will be described. As described above, the shape of the shallow groove 15 of the tape cartridge 11 corresponds to the shape of the label 12, and the size of the shallow groove 15 is larger than the size of the label 12. Therefore, as long as the label 12 is correctly attached to the tape cartridge 11, as shown in FIG. 4, the label 12 fits in the shallow groove 15 in any of the upper, lower, left and right portions P1 to P6. A gap having a predetermined width is generated between the outer edge and the edge of the shallow groove 15, and in each of the portions P <b> 1 to P <b> 6, the edge portion of the label 12 and the edge of the shallow groove 15 to which the label 12 is attached. Depending on the part, two edges E1 and E2 can be detected.

  On the other hand, when the sticking position of the label 12 in FIG. 4 is biased upward, the gap between the two edges E1 and E2 is smaller than the predetermined gap width in the upper portions P1 and P2, and the lower side In the portions P5 and P6, the gap between the two edges E1 and E2 is larger than a predetermined gap width. When the sticking position of the label 12 is further biased to the upper side, the outer edge of the label 12 and the edge of the shallow groove 15 overlap, so that the two edges E1 and E2 can be detected at the upper portions P1 and P2. Disappear.

  Further, when the sticking position of the label 12 in FIG. 4 is biased downward, the gap between the two edges E1 and E2 is smaller than a predetermined gap width in the lower parts P5 and P6, and the upper part. In P1 and P2, the gap between the two edges E1 and E2 is larger than a predetermined gap width. When the sticking position of the label 12 is further biased to the lower side, in the lower portions P5 and P6, the outer edge of the label 12 and the edge of the shallow groove 15 overlap, so the lower portions P5 and P6 The two edges E1 and E2 cannot be detected. Moreover, when the error has arisen in the sticking angle of the label 12, variation arises in the gap | interval of the two edges E1 and E2 in the parts P1-P6. When an error further occurs in the sticking angle of the label 12, a portion where the two edges E1 and E2 can be detected and a portion where the two edges E1 and E2 cannot be detected are generated in the portions P1 to P6.

  In this way, if the label 12 is correctly attached to the tape cartridge 11, the two edges E1 and E2 can be detected in all the upper and lower parts P1 to P6, and the labels 12 in all the parts P1 to P6 can be detected. The gap width between the outer edge and the edge of the shallow groove 15 is a predetermined size. From this, the part corresponding to the parts P1 to P6 is extracted from the photographed image of the camera 21 by the window extraction process, and it is determined whether or not the two edges E1 and E2 can be detected in any part of the parts P1 to P6. By determining whether or not the widths of the edges E1 and E2 are within a predetermined allowable value, it is possible to determine whether the label attaching position is good or bad.

  As described above, the pass / fail determination unit 24 determines whether or not the two edges E1 and E2 have been detected in the parts P1 to P6 and the window extraction process for extracting the parts P1 to P6 from the captured image of the camera 21. An edge determination process and a gap determination process for determining whether or not the widths of the two edges E1 and E2 are within a predetermined allowable value are performed to determine the quality of the label attachment position.

  Next, processing in the light amount setting unit 25 will be described. As described above, in the misalignment inspection apparatus for the label 12, the specular reflection image of the tape cartridge 11 to which the label 12 is attached by the coaxial incident illumination 22 is captured by the camera 21, and each portion P <b> 1 to P <b> 1 of the captured image of the camera 21 is captured. At P6, two edges E1 and E2 are detected, and the quality of the label attaching position is determined. When the tape cartridge 11 is irradiated by the coaxial epi-illumination 22 and photographed by the camera 21, the brightness changes in the gap portion between the outer edge of the label 12 and the edge of the shallow groove 15 (contrast), and the two edges E1 and E2 are detected. it can. The light amount setting unit 25 optimally sets the light amount of the coaxial epi-illumination 22 so that the two edges E1 and E2 can be reliably detected.

  In the light amount setting unit 25, while gradually increasing the light amount of the coaxial epi-illumination 22 from a low level to a high level, the portions P1 to P6 are extracted from the captured image of the camera 21 by the window extraction process, and 2 in the portions P1 to P6. It is determined whether or not two edges E1 and E2 can be detected, and in one of them, the light quantity level at which the edges E1 and E2 cannot be detected is multiplied by a predetermined experimental value coefficient of 1 or less to obtain an appropriate light quantity level. Seeking.

  FIG. 5 is a flowchart showing processing in the light amount setting unit 25. In FIG. 5, the light amount setting unit 25 initially sets the position and size of the window for extracting the portions P1 to P6 (step S1), and then initializes the light amount of the coaxial incident illumination 22 to the low light level (step S2). ). When the light quantity of the coaxial epi-illumination 22 is initially set to a low light quantity level, the light quantity setting unit 25 irradiates light from the coaxial epi-illumination 22 with the set light quantity (step S3), and the windows P1 to P6 are set. Edge detection is performed (step S4), and it is determined whether or not two edges E1 and E2 can be detected in all the portions P1 to P6 (step S5).

  Here, when it is determined that the two edges E1 and E2 can be detected in all the portions P1 to P6 (Yes in step S5), the light amount setting unit 25 increases the light amount of the coaxial incident illumination 22 from the low light amount level by a predetermined amount. Increase by the minute (step S6). Then, the light quantity setting unit 25 determines whether or not the upper limit of the light quantity has been reached (step S7). If the upper limit of the light quantity has not been reached, the process returns to step S3, and the coaxial incident illumination is performed with the newly set light quantity. 22 is irradiated with light (step S3), edges are detected in the windows P1 to P6 (step S4), and it is determined whether or not two edges E1 and E2 can be detected in all the parts P1 to P6. (Step S5).

  By repeating the processing from step S3 to step S7, the light quantity of the coaxial incident illumination 22 gradually increases from the initially set low light quantity level. When the light amount level is gradually increased from the low light amount level to the high light amount level and the light amount becomes excessive, the two edges E1 and E2 cannot be determined, and in step S5, the two edges E1 in all the parts P1 to P6. And E2 are determined not to be detectable. If it is determined in step S5 that the two edges E1 and E2 cannot be detected even at one of all the portions P1 to P6 (No in step S5), the light amount setting unit 25 sets the light amount level at this time. Is multiplied by an experimental value coefficient of 1 or less (step S8) and set as an appropriate light quantity level (step S9).

  That is, when it is determined in step S5 that the two edges E1 and E2 cannot be detected in all the portions P1 to P6, this means that the light amount is set too large at this light amount level. Therefore, in the process of step S8, the appropriate light quantity level is obtained by multiplying the light quantity level when it is determined that the two edges E1 and E2 cannot be detected in all the portions P1 to P6 by an experimental value coefficient of 1 or less. Looking for. More specifically, the experimental value coefficient is 0.65 to 0.75, which is 0.7 in the embodiment. If it is determined in step S7 that the upper limit of the light quantity has been reached, the process proceeds to step S8, and the upper limit light quantity level is multiplied by an experimental value coefficient of 1 or less (step S8) to obtain an appropriate light quantity. The level is set (step S9).

  As described above, in the positional deviation inspection method for the label 12 according to the first embodiment of the present invention, the light intensity level of the coaxial incident illumination 22 is gradually increased from the low light intensity level to the high light intensity level, and all the parts P1. The optimum light amount of the coaxial incident illumination 22 is set by multiplying the light amount when the two edges E1 and E2 cannot be determined in .about.P6 by an experimental coefficient of 1 or less.

  In such a light amount setting method, it is only determined whether the two edges E1 and E2 can be detected from the image of the camera 21 while gradually increasing the light amount level of the coaxial incident illumination 22 from the low light amount level to the high light amount level. Thus, the light quantity of the coaxial incident illumination 22 can be set. In addition, such a light quantity setting method does not require a reference sample. For this reason, even if the printing pattern of the label 12 and the color and material of the tape cartridge 11 are changed, it can be easily handled.

  Further, in such a light amount setting method, a window extraction process for extracting the parts P1 to P6 from the captured image of the camera 21, and an edge determination process for determining whether or not the two edges E1 and E2 have been detected in the parts P1 to P6. Is the same as the processing in the pass / fail judgment unit 24. For this reason, when the type of the label 12 is changed and when the model of the tape cartridge 11 is changed, the label displacement determination process and the light quantity setting process can be performed together. If it is determined that the label 12 is misaligned in the position misalignment determination process, the setting of the light amount level in the inspection object can be stopped, and the light amount level can be set by moving to the next inspection object. .

FIG. 6 is an explanatory diagram when the positional deviation inspection method for the label 12 according to the first embodiment of the present invention is realized in the production process of the tape cartridge 11. In this example, an optical system for inspecting misalignment of the label 12 is provided in two directions.
In FIG. 6, a plurality of produced tape cartridges 11 (11 a, 11 b, 11 c,...) Are transported to the transport unit 101. Here, the tape cartridge 11a is at the position of the misalignment inspection process section 104, the tape cartridge 11b is at the position of the side label attaching process section 103, and the tape cartridge 11c is at the position of the upper surface label attaching process section 102.

  The upper surface label sticking process part 102 performs the process which isolate | separates the label 12 from the hoop-shaped label paper, and sticks the label 12 on the upper surface with respect to the tape cartridge 11c. Subsequently, the side label sticking process unit 103 performs a process of pressing the label 12 protruding from the side surface of the tape cartridge 11b with a roller and sticking the label 12 to the side surface of the tape cartridge 11b. The positional deviation inspection process unit 104 includes cameras 21a and 21b provided on the left and right, coaxial incident illuminations 22a and 22b, and a control unit 110, and inspects the positional deviation of the label 12 of the tape cartridge 11c. . Here, the control unit 110 performs processing of the camera control unit 23, the pass / fail determination unit 24, and the light amount setting unit 25 in FIG.

  In the misalignment inspection process unit 104, as described above, portions corresponding to the portions P1 to P6 are extracted from the captured images of the cameras 21a and 21b by the window extraction process, and any of the portions P1 to P6 has two edges E1 and It is determined whether or not E2 has been detected, and whether or not the width of the edges E1 and E2 is within a predetermined allowable value is determined to determine whether the label attaching position is good or bad. Further, as described above, the positional deviation inspection process unit 104 gradually increases the light intensity level of the coaxial incident illuminations 22a and 22b from the low light intensity level to the high light intensity level, and two edges are formed at all the portions P1 to P6. By multiplying the amount of light when E1 and E2 can no longer be determined by an experimental coefficient of 1 or less, the optimal amount of light for the coaxial incident illuminations 22a and 22b is set.

The defective product discharge process unit 105 performs a process of discharging a label 12 that is misaligned as a defective product based on the inspection result in the misalignment inspection process unit 104.
As described above, in the misalignment inspection process unit 104 in this example, two optical systems including the cameras 21 a and 21 b and the coaxial incident illuminations 22 a and 22 b are provided on the left and right with respect to the transport unit 101. As described above, in the configuration having two optical systems, the positional deviation can be detected by using the two optical systems sequentially.

  As shown in the flowchart of FIG. 7, when performing the misalignment inspection, the control unit 110 positions the tape cartridge 11 a at a predetermined position of the misalignment inspection process unit 104 (step S <b> 101), and sets the left coaxial incident illumination 22 a. The light is turned on (step S102), and the displacement of the label 12 on the left side of the tape cartridge 11a is detected based on the imaging signal of the left camera 21a (step S103). Next, the control unit 110 turns off the left coaxial incident light 22a, turns on the right coaxial incident light 22b (step S104), and uses the right side label 12 of the tape cartridge 11a according to the imaging signal of the right camera 21b. Is detected (step S105). Then, the control unit 110 turns off the right-side coaxial incident illumination 22b (step S106), and performs a comprehensive determination of the label 12 displacement inspection (step S107).

  As described above, in the position shift detection processing in steps S103 and S105, the portions corresponding to the portions P1 to P6 are extracted from the captured images of the cameras 21a and 21b by the window extraction processing, and any portion of the portions P1 to P6 is set to 2. This is performed by determining whether or not two edges E1 and E2 have been detected, and determining whether or not the widths of the edges E1 and E2 are within a predetermined allowable value.

Further, it is assumed that the type of the label 12 and the model of the tape cartridge 11 are changed in such a production process. In this case, since the optimal light quantity of the coaxial incident illuminations 22a and 22b changes with the change in the printing pattern of the label 12 and the color and material of the tape cartridge 11, the light quantity needs to be reset.
In this case, the amount of light of the coaxial epi-illuminations 22a and 22b can be set optimally by performing the processing shown in the flowchart in FIG. At this time, the determination of the positional deviation inspection is also performed, and when it is determined that the sticking is defective by this determination step, the light amount setting process on the inspection object is finished, and the inspection target of the light amount setting process Is transferred to the next, which is the same kind of label and the same kind of tape cartridge.

  That is, in FIG. 6, for example, it is assumed that the type of the label 12 and the model of the tape cartridge 11 are changed from the tape cartridge 11a. In the following tape cartridges 11b, 11c,..., The type of the label 12 and the model of the tape cartridge 11 are the same as those of the tape cartridge 11a. In this case, first, the control unit 110 sets the light amount of the coaxial incident illuminations 22a and 22b by the tape cartridge 11a, and determines the displacement test. Here, when it is determined that the sticking is defective due to the determination of the positional deviation inspection of the tape cartridge 11a, the control unit 110 detects the edge in the subsequent processing (parts P1 to P6 in step S4 in FIG. 5). Processing to be performed, processing to determine whether or not the two edges E1 and E2 can be detected in all the parts P1 to P6 in step S5, processing to gradually increase the light quantity in steps S6 and S7, 1 in step S8 The process of multiplying the following experimental coefficient and the process of setting the optimum light intensity of the coaxial incident illuminations 22a and 22b in step S9) are stopped, and the inspection object is transferred to the same type of tape cartridge 11b to which the same type of label 12 is attached. The amount of light is set by performing the process shown in FIG. 5 on the tape cartridge 11b.

  As described above, when inspection is performed in a production lot in which the printing pattern of the label 12 or the color or material of the tape cartridge 11 is different, the coaxial incident illumination light quantity is set together with the determination of the positional deviation inspection, The lighting level can be set appropriately.

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention.

  11, 11a, 11b, 11c: tape cartridge, 12: label, 15: shallow groove, 21, 21a, 21b: camera, 22, 22a, 22b: coaxial incident illumination, 23: camera control unit, 24: pass / fail judgment unit, 25: Light quantity setting unit, 101: Conveying unit, 102: Upper surface label attaching process unit, 103: Side label attaching process unit, 104: Position shift inspection process unit, 105: Defective product discharging process unit, 110: Control unit

Claims (8)

A light amount setting method for coaxial epi-illumination in an image recognition apparatus for recognizing an image of a first edge of an alignment target member and a second edge of an alignment member aligned with the first edge with a predetermined allowable gap width. There,
A continuous recognition step of continuing image recognition of the first edge and the second edge while increasing the light amount of the coaxial epi-illumination from a low level to a high level;
An impossible level acquisition step of acquiring an impossible light amount level when individual image recognition of the first edge and the second edge is disabled in the process of increasing the light amount;
An aptitude level calculation step for obtaining an aptitude level by multiplying the impossible light level by an experimental value coefficient of 1 or less;
A light amount setting method for coaxial epi-illumination, comprising: a light amount setting step for setting the light amount of the coaxial epi-illumination to the appropriate light amount level.   The method for setting the amount of light for coaxial epi-illumination according to claim 1, wherein the experimental value coefficient is 0.65 to 0.75. In the continuous recognition step, image recognition of the first edge and the second edge is performed for a plurality of locations,
The coaxial epi-illumination according to claim 1 or 2, wherein, in the impossibility level acquisition step, the impossibility light amount level is acquired when the image recognition becomes impossible at least in one of the plurality of places. Light intensity setting method. The alignment member is a label, and the second edge is an edge of the label;
4. The device according to claim 1, wherein the member to be aligned is a cartridge to which the label is attached, and the first edge is an edge of a shallow groove to which the label is attached. A method for setting the light intensity of the coaxial epi-illumination described in the above.   5. The method of setting the amount of light for coaxial epi-illumination according to claim 4, wherein the coaxial epi-illumination is coaxial surface-emitting epi-illumination. A method for inspecting misalignment of a label performed by using the image recognizing apparatus having the coaxial epi-illumination set by the light-amount setting method, while performing the light amount setting method of the coaxial epi-illumination according to claim 4 or 5.
After the light quantity setting step,
An image recognition step for recognizing the first edge and the second edge;
A determination step of determining that the label is stuck when the gap width between the first edge and the second edge is out of the allowable gap width as a result of the image recognition. Label misalignment inspection method.   The label displacement inspection method according to claim 6, wherein the light amount setting method is performed when the type of the label is changed and when the model of the cartridge is changed. In the continuation recognition step of the light amount setting method, the determination step is performed together,
When it is determined that the sticking is poor by the determination step, the execution of the impossibility level acquisition step, the suitability level calculation step and the light amount setting step is stopped,
The label displacement inspection method according to claim 7, wherein the light amount setting method is performed on the next inspection target which is the same type of label and the same type of cartridge.

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