WO2012070399A1 - 板状体積層体の板状体計数装置及び板状体積層体の板状体計数方法 - Google Patents
板状体積層体の板状体計数装置及び板状体積層体の板状体計数方法 Download PDFInfo
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- WO2012070399A1 WO2012070399A1 PCT/JP2011/075960 JP2011075960W WO2012070399A1 WO 2012070399 A1 WO2012070399 A1 WO 2012070399A1 JP 2011075960 W JP2011075960 W JP 2011075960W WO 2012070399 A1 WO2012070399 A1 WO 2012070399A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M1/00—Design features of general application
- G06M1/08—Design features of general application for actuating the drive
- G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
- G06M1/101—Design features of general application for actuating the drive by electric or magnetic means by electro-optical means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M7/00—Counting of objects carried by a conveyor
- G06M7/02—Counting of objects carried by a conveyor wherein objects ahead of the sensing element are separated to produce a distinct gap between successive objects
- G06M7/06—Counting of flat articles, e.g. of sheets of paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/48—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for glass sheets
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
- G06M9/00—Counting of objects in a stack thereof
Definitions
- the present invention relates to a plate-like body counting apparatus for a plate-like body laminate and a plate-like body counting method for a plate-like body laminate.
- a glass substrate for FPD such as a glass substrate for plasma display and a glass substrate for liquid crystal display, and a large glass substrate as an intermediate product in the manufacturing process are laminated on a vertically stacked pallet disclosed in Patent Document 1 and the like. Transported.
- This pallet includes a bottom receiving plate that receives the lower edge portion of the glass substrate and a back receiving plate that receives the surface of the glass substrate.
- the glass substrate is loaded on the pallet by, for example, adsorbing the glass substrate that has been inspected in the inspection process by an adsorption unit of a robot, and then operating the robot to stack the glass substrates one by one on the pallet.
- the number of glass substrates loaded on the pallet is determined in advance, and the number is automatically counted based on the number of stacking operations by the robot.
- the present invention has been made in view of such circumstances, and a plate-like body counting device for a plate-like laminate that can accurately count the number of plate-like bodies and a plate-like body of the plate-like laminate.
- An object is to provide a counting method.
- the present invention relates to a plate-like body counting apparatus for counting a number of plate-like bodies in a plate-like body laminate in which a plurality of plate-like bodies are laminated.
- a light receiving means for receiving light
- an image processing means for binarizing the image information of the laminated surface output from the light receiving means to obtain candidate points corresponding to the plate-like body
- the image processing means Calculating means for calculating the number of plate-like bodies by counting fixed points calculated based on the obtained candidate points, the calculating means comprising a reference pitch based on the thickness of the plate-like bodies Is provided, a candidate point equal to the reference pitch is calculated as a fixed point, and a plate-like body counting apparatus for a plate-like laminate that counts all the calculated fixed points is provided.
- the present invention provides a plate-like body counting method for counting the number of plate-like bodies in a plate-like body laminate in which a plurality of plate-like bodies are laminated.
- a plate-like body counting method for a plate-like laminate which calculates a reference pitch based on a thickness, calculates a candidate point equal to the reference pitch as a decision point, and counts all the calculated decision points.
- the light receiving means is brought into contact with the laminated surface of the plate laminated body, and the reflected light from the laminated surface is received by the light receiving means.
- the plate-like laminate may be a packaged form in which all desired plate-like bodies are laminated, or a packaged form in the middle of lamination.
- the image processing means performs black and white binarization processing on the image information of the laminated surface output from the light receiving means, and obtains candidate points corresponding to the plate-like body.
- the central portion of the black image is acquired as a candidate point.
- the calculation means counts the candidate points acquired by the image processing means and calculates the number of plate-like bodies. Further, the calculation means calculates a reference pitch based on the thickness of the plate-like body, and calculates a candidate point equal to the reference pitch as a fixed point. Then, the computing means counts all the calculated fixed points.
- the calculation means recognizes that a plate-like body exists in the image received by the light-receiving means, and counts the number of the plate-like bodies. Thereby, according to this invention, the number of the laminated plate-like bodies can be counted correctly.
- the plate counting device of the present invention is a device for measuring by inserting a reflection plate that reflects light from the laminated surface of the plate laminate in the gap of the plate laminate, the installation place, There are no restrictions on accuracy and it can be handled easily. Further, according to the present invention, the measurement time can be shortened.
- the present invention preferably includes light projecting means for projecting light onto the laminated surface.
- the light projecting means it is possible to illuminate the laminated surface, so that the reflected light from the laminated surface can be received by the light receiving means even in a dark part.
- the light receiving means of the present invention is preferably a line sensor.
- the line sensor can sufficiently perform the function.
- the line sensor it is possible to reduce the manufacturing cost of the plate-like body counting device compared to using an expensive area sensor.
- the plate-like laminate of the present invention is preferably formed by alternately laminating plate-like bodies and plate-like body protecting members.
- the plate-shaped body is recognized as a black image, and the plate-shaped body protecting member is white. Since it is recognized as an image and its contrast is clear, it is easy to set a threshold value during binarization processing.
- the plate-like body of the present invention is preferably a transparent member.
- the present invention is suitable for a laminate of transparent members such as a glass plate and a resin plate.
- the number of plate-like bodies can be accurately counted.
- FIG. 1 is a perspective view in which a glass plate laminate is mounted on a glass plate packing pallet.
- FIG. 2 is an enlarged front view showing the counting device.
- FIG. 3 is a flowchart for counting the number of glass sheets by the counting device.
- FIG. 4 is a diagram showing an image signal of the glass plate laminate output from the line sensor.
- FIG. 5 is a diagram showing an image signal of the binarized glass plate laminate.
- FIG. 6 is a diagram showing an image of a binarized glass plate laminate.
- FIG. 7 is an image diagram used when searching for the glass plate counting start position.
- FIG. 8 is an image diagram in which the end position of the count candidate point and the end position of the count fixed point are the same position.
- FIG. 1 shows a glass plate packing pallet in which a plurality of rectangular glass plates G are vertically stacked via rectangular slip sheets (plate-shaped body protection members) 10, 10. 14 is a perspective view mounted on FIG.
- the slip sheet 10 is exemplified as the plate-like body protection member, but the present invention is not limited to this.
- a resin film, a resin sheet, and a foamed resin sheet can be applied as the plate-like body protection member.
- stacking form of the glass plate laminated body 12 is not limited to such vertical stacking, The flat lamination
- the glass plate packing pallet 14 includes a pedestal 18 having a flat mounting surface 16 formed on the upper surface.
- the glass plate packaging pallet 14 is provided with a flat bottom plate 20 on which the glass plate G is placed while being provided at a predetermined angle with respect to the mounting surface 16.
- the glass plate packing pallet 14 is provided with an inclined base 22 that is inclined with respect to the bottom plate 20 at an angle of about 90 °.
- a flat resin back plate (not shown) is fixed to the front surface of the inclined base 22 with an adhesive. The back surface of the glass plate G is received by this back plate, and the glass plate laminate 12 is mounted on the pallet 14 in a vertical position.
- the glass plate packing pallet 14 includes a bottom plate receiving member 24 that supports the bottom plate 20 on the mounting surface 16 at a predetermined angle, and a frame-shaped receiving member 26 that is erected on the mounting surface 16 and supports the back surface of the inclined base 22. And have.
- the pedestal 18 is formed by welding a large number of short and long steel materials in the vertical and horizontal directions and in the height direction, and the mounting surface 16 is processed to a predetermined flatness by grinding after the welding assembly. Further, the front and rear surfaces of the pedestal 18 are provided with openings 28 and 28 for inserting and removing forklift claws (not shown).
- the interleaf paper 10 is a sheet interposed between the glass plates G in order to prevent the glass plates G from directly contacting each other.
- the interleaf paper 10 is paper having a size larger than that of the glass plate G, and a part of the interleaf paper 10 is protruded from the side portion of the glass plate G.
- the protruding portion of the interleaf paper 10 the elongated upper edge portion 10a protruding from the upper side of the glass plate G is adsorbed and held by a suction pad (not shown) so that the interleaf paper 10 is a pallet for packing glass plates. 14 is taken out.
- the slip sheet 10 when the glass plate G is vertically stacked like the glass plate packing pallet 14 of the embodiment, when the slip sheet 10 protrudes from the lower side of the glass plate G, a large number of glass plates G, G. There is a possibility that the vicinity of the lower side of the glass plate G may be damaged during packaging or transportation. Therefore, the slip sheet 10 does not protrude from the lower side of the glass plate G, and protrudes only from the upper side of the glass plate G and from the left and right sides.
- Numeral 30 is a counting device that counts the number of glass plates G of the glass plate laminate 12.
- FIG. 2 is an enlarged front view showing the counting device 30 of FIG.
- the counting device 30 includes a line sensor 32 and a reflecting plate 34.
- the reflection plate 34 is provided in the gap 52 below the lower surface 12A, which is the laminated surface of the glass plate laminate 12, and reflects the light (image) on the lower surface 12A toward the line sensor 32.
- the line sensor 32 is provided on the side of the reflecting plate 34 and images reflected light from the lower surface 12A. If the line sensor 32 can be inserted into the gap 52 and the reflected light from the lower surface 12A can be directly imaged, the reflecting plate 34 is unnecessary.
- a light projecting unit (not shown) that projects light toward the lower surface 12A may be provided.
- the glass plate laminated body 12 on which the number of glass plates G is counted may be a packaged form in which all desired plate-like bodies are laminated, or a packaged form in the middle of lamination.
- the line sensor 32 is used as the light receiving means in the embodiment, an area sensor may be used. However, since the light receiving means only needs to have a function of receiving the reflected light from the lower surface 12A of the glass plate laminate 12, the line sensor 32 can sufficiently perform the function. In addition, by using the line sensor 32, it is possible to reduce the manufacturing cost of the counting device 30 compared to using an expensive area sensor.
- the image signal (image information) indicating the image of the reflected light received by the line sensor 32 is output to the signal processing unit 36 shown in FIG.
- FIG. 3 is a flowchart for counting the number of glass sheets G by the counting device 30.
- the signal processing unit 36 processes and calculates the image signal according to the processing procedure shown in the flowchart of FIG. That is, in the signal processing unit 36, smoothing processing (S100), PV (Peak-to-Valley) processing (S110), enhancement processing (S120), binarization processing (S130) is performed by the image processing means, and arithmetic means
- smoothing processing S100
- PV Poreak-to-Valley
- enhancement processing S120
- binarization processing S130
- the glass plate distance calculation (S140), pitch calculation (S150), glass plate count start position search (S160), glass plate number calculation (S170), and end position search (S180) are performed.
- the smoothing process (S100) smoothes the image signal output from the line sensor 32.
- the smoothing process (S100) noise included in the image signal is removed and a necessary image signal is extracted.
- this is a process of calculating a moving average between the luminance of the pixel to be smoothed in the image signal and the luminance of the pixels before and after the pixel, and is expressed by equation (1).
- FIG. 4 is a diagram showing an image signal of the glass plate laminate 12 output from the line sensor 32.
- the horizontal axis represents the number of lines (number of pixels) of the line sensor 32, and the vertical axis represents luminance.
- the image signal is a signal in which a peak and a valley are continuous, the peak indicates the brightness of the reflected light from the interleaf paper 10, and the valley indicates the brightness of the reflected light from the lower side of the glass plate G.
- stacked the glass plate G and the interleaving paper 10 alternately is shown, the laminated body only of the glass plate G except the interleaving paper 10 may be sufficient. .
- the luminance at the boundary between the glass plate G and the glass plate G is higher than the luminance of the glass plate G.
- noise removal by moving average is exemplified, but the present invention is not limited to this.
- noise removal by a median filter can be applied.
- the median filter is a technique capable of blurring only noise while the noise removal method using moving average blurs a necessary image signal together with noise. Specifically, the luminance level of the pixel to be processed and the luminance level around the pixel are sequentially arranged, and noise is removed by replacing the median (median value) with the pixel to be processed.
- the brightness of the pixels corresponding to the glass plate G in the smoothed image signal is brought close to zero.
- this is a process of calculating the difference between the maximum brightness and the minimum brightness in the brightness of a plurality of pixels in a certain section centered on the pixel to be processed by PV. Since the luminance change amount of the pixel corresponding to the glass plate G is small, the difference between the maximum luminance and the minimum luminance is small, and the luminance in the range is processed to a value close to zero. Therefore, it becomes easy to set a threshold value in the binarization process (S130) described later. In the PV process (S110), if the difference in intensity received by the line sensor is extreme, that is, it is easy to set the threshold value in the binarization process (S130) without performing the binarization process. May be omitted.
- the luminance of the pixel is amplified by a predetermined multiple.
- the enhancement process (S130) may be omitted when the brightness received by the line sensor 32 is high.
- FIG. 5 is an image signal of the binarized glass plate laminate 12.
- FIG. 6 is an image of the image signal of FIG. 7, and is a diagram illustrating the imaging of the binarized glass plate laminate 12.
- the glass plate G is displayed as a black image B, and the slip sheet 10 is displayed as a white image W.
- Pitch calculation (S150) calculates a reference pitch based on the thickness of the glass plate G loaded on the pallet 14 for packing glass plates.
- the reference pitch refers to a value obtained by adding a predetermined allowable value to the thickness of the glass plate G. For example, when the thickness of the glass plate G is 0.7 mm and the allowable value is ⁇ 10%, the reference pitch is 0.63 to 0.77 mm. If the glass plates G are laminated via the interleaf paper 10, the total thickness ⁇ 10% of one glass plate G and one interleaf paper 10 becomes the reference pitch.
- the data on the thickness of the glass plate G and the slip sheet 10 is input in advance to the signal processing unit 36 before the pitch calculation (S150) is executed.
- the allowable value is not limited to ⁇ 10%. Any value that can accurately count the number of glass plates G may be used.
- FIG. 7 is an image diagram used when the position search for counting the glass sheet G is started.
- FIG. 7 shows that among the plurality of candidate points P, the glass plate G does not exist at the first and second candidate points P from the left, and the third candidate point P is used as the glass plate counting start candidate.
- FIG. 4 is a diagram showing all candidate points P as fixed points P ′ indicating that a glass plate G exists from the candidate point P at the start of counting to the right.
- the fixed point P ′ is indicated by a circle surrounding the circle of the candidate point P.
- the pitch composed of the third candidate point P and the fourth candidate point P is determined by the signal processing unit 36 to be a pitch corresponding to the reference pitch, so that the third candidate point is The fixed point P ′ is determined, and the fixed point P ′ is determined as the counting start position of the number of glass sheets.
- the candidate point P serving as the reference pitch is regarded as the fixed point P ', and the number of glass sheets G is calculated based on the determined point P'.
- FIG. 8 is an image diagram showing an example of performing the end position search (S180), where the end position (300) of the candidate point P and the end position (300) of the fixed point P ′ are the same position. is there. That is, there is no candidate point that does not correspond to the reference pitch. In this case, all of the candidate points P are regarded as the fixed points P ′, and the number of glass sheets G is calculated based on the number of the fixed points P ′.
- This image combining process is performed by matching the phases of the image signals in the vicinity of the image combining portion.
- the line sensor 32 can accurately count the number of the laminated glass plates G.
- the plate-like body is a glass plate, but the plate-like body of the present invention is not limited to a glass plate, and is preferably a transparent member.
- the transparent member means a member that transmits light having a wavelength in the visible light region, and the transmittance is preferably 50% or more, more preferably 70% or more, and 90%. More preferably, it is the above.
- the transparent member other than the glass plate include acrylic resin, fluororesin, polycarbonate, and polyethylene terephthalate.
- G Glass plate, 10 ... Interleaf, 10a ... Upper edge part, 12 ... Glass plate laminate, 12A ... Lower surface, 14 ... Pallet for packing glass plate, 16 ... Mounting surface, 18 ... Base, 20 ... Bottom plate, 22 ... Tilting table, 24 ... bottom plate receiving member, 26 ... frame-shaped receiving member, 28 ... opening, 30 ... counting device, 32 ... line sensor, 34 ... reflector, 36 ... signal processing unit, 52 ... gap
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Abstract
Description
(1)式において、Xnは平滑化処理対象の画素の輝度、Xn-1及びXn+1はそれぞれXnの前後の画素の輝度、YnはXnを平滑化処理した輝度である。図4は、ラインセンサ32から出力されたガラス板積層体12の画像信号を示した図である。横軸はラインセンサ32のライン数(画素数)、縦軸は輝度である。画像信号は山部と谷部とが連続する信号であり、山部は合紙10からの反射光の輝度を示し、谷部はガラス板Gの下辺からの反射光の輝度をそれぞれ示している。なお、実施の形態では、ガラス板Gと合紙10とを交互に積層したガラス板積層体12が示されているが、合紙10を除いたガラス板Gのみの積層体であってもよい。この場合も、ガラス板Gとガラス板Gとの間の境界部の輝度が、ガラス板Gの輝度よりも高くなる。
本出願は、2011年11月26日出願の日本特許出願2010-264021に基づくものであり、その内容はここに参照として取り込まれる。
Claims (6)
- 複数枚の板状体が積層された板状体積層体の板状体枚数を計数する板状体積層体の板状体計数装置において、
板状体積層体の積層面の反射光を受光する受光手段と、
前記受光手段から出力される前記積層面の画像情報を二値化処理して前記板状体に対応する候補点を取得する画像処理手段と、
前記画像処理手段によって取得された候補点に基づいて算出された確定点を計数することにより前記板状体の枚数を演算する演算手段と、を備え、
前記演算手段は、前記板状体の厚さに基づき基準ピッチを算出し、前記基準ピッチと等しい候補点を確定点として算出し、該算出した全ての確定点を計数する板状体積層体の板状体計数装置。 - 前記積層面に光を投光する投光手段を備える請求項1に記載の板状体積層体の板状体計数装置。
- 前記受光手段は、ラインセンサである請求項1又は2に記載の板状体積層体の板状体計数装置。
- 前記板状体積層体は、板状体と板状体保護部材とが交互に積層されてなる請求項1~3のいずれか一項に記載の板状体積層体の板状体計数装置。
- 前記板状体は、透明部材である請求項1~4のいずれか一項に記載の板状体積層体の板状体計数装置。
- 複数枚の板状体が積層された板状体積層体の板状体枚数を計数する板状体積層体の板状体計数方法において、
板状体積層体の積層面の反射光を受光し、
前記反射光に基づいた前記積層面の画像情報を二値化処理して前記板状体に対応する候補点を取得し、
前記板状体の厚さに基づき基準ピッチを算出するとともに、前記基準ピッチと等しい候補点を確定点として算出し、
算出した全ての確定点を計数する板状体積層体の板状体計数方法。
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KR1020137013248A KR101799617B1 (ko) | 2010-11-26 | 2011-11-10 | 판상체 적층체의 판상체 계수 장치 및 판상체 적층체의 판상체 계수 방법 |
CN201180056820.7A CN103238160B (zh) | 2010-11-26 | 2011-11-10 | 板状体层叠体的板状体计数装置以及板状体层叠体的板状体计数方法 |
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JP2004094442A (ja) * | 2002-08-30 | 2004-03-25 | Sony Corp | 枚数計測方法および枚数計測装置 |
JP2005293000A (ja) * | 2004-03-31 | 2005-10-20 | Kirin Techno-System Corp | 積層枚数計測装置 |
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KR20130140746A (ko) | 2013-12-24 |
JP2014032431A (ja) | 2014-02-20 |
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