JP5933948B2 - Pattern measuring device and pattern measuring method - Google Patents

Description

  The present invention relates to a pattern measuring device and a pattern measuring method for measuring the position of an uneven pattern formed on the surface of a building material or the like.

  Conventionally, a building material is manufactured by forming an uneven pattern on the surface of a base material. Moreover, in order to utilize for the various processes of manufacture of building materials, measuring the position of an uneven pattern is performed (for example, refer patent document 1).

  In measuring the position of the uneven pattern, for example, a method has been proposed in which the surface shape of the outer wall material is measured using a laser displacement sensor, and joints are extracted using parameters such as height difference, width, area, and center of gravity. Yes. In addition, another method has been proposed in which the surface shape of the outer wall material being conveyed is imaged with a line camera and a feature pattern is detected using a pattern matching technique.

JP 2003-340351 A

  However, in any of the above methods, there is a problem that it is difficult to accurately measure a random pattern in which the position of the uneven pattern differs for each base material. That is, in the above method, since only the feature pattern (a specific pattern of interest as a detection target) in one rotation of the roll-shaped uneven pattern for forming the uneven pattern can be detected, the uneven pattern It can only handle expansion and contraction that is an integral multiple of the length of one rotation (for example, about 1130 mm or about 1319 mm). Also, when the base material expands or contracts during the manufacturing process, the position of the feature pattern varies from base material to base material. Therefore, it was difficult to accurately measure a random pattern.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a pattern measuring device and a pattern measuring method that can easily measure a random pattern accurately.

The pattern measuring device according to the present invention is a pattern measuring device for measuring a concavo-convex pattern of a base material press-molded using a concavo-convex mold,
Processing data storage means for storing the uneven three-dimensional processing data;
Feature data storage means for storing data of an arbitrary feature selected from the processed data;
A concavo-convex pattern data storage means for storing three-dimensional concavo-convex pattern data obtained by measuring the entire concavo-convex pattern formed on the substrate;
By comparing the feature data and the concavo-convex pattern data, it is detected where the feature pattern formed on the base material by the feature section appears from one end of the base material, and the detected feature Comparing the processed data with the concavo-convex pattern data on the basis of the position of a pattern, the calculation means for calculating a positional deviation between the processed data and the concavo-convex pattern data, and the positional deviation is the feature pattern It is a position shift of the convex pattern part of the said uneven | corrugated pattern or a concave joint part on the basis of this position .

  In the pattern measuring device, the concavo-convex mold may be a roll-shaped concavo-convex mold, and the overall length of the base material may be formed so as not to be an integral multiple of the peripheral length of the concavo-convex mold.

The pattern measuring method according to the present invention is a pattern measuring method for measuring a concavo-convex pattern of a base material press-molded using a concavo-convex mold,
Storing the uneven three-dimensional processing data in a processing data storage means;
Store the data of any feature selected from the processing data in the feature data storage means,
Storing the three-dimensional uneven pattern data obtained by measuring the entire uneven pattern formed on the substrate by the uneven pattern data storage means;
By comparing the feature data and the concavo-convex pattern data, it is detected where the feature pattern formed on the base material by the feature section appears from one end of the base material, and the detected feature By comparing the processed data with the concave / convex pattern data based on the position of the pattern, a positional deviation between the processed data and the concave / convex pattern data is calculated, and the positional deviation is based on the position of the characteristic pattern. It is the position shift of the convex pattern part and concave joint part of the said uneven | corrugated pattern characterized by the above-mentioned .

In the pattern measurement method, a plurality of the concave joint portions are arranged in parallel in a direction substantially parallel to the conveyance direction of the base material, and a part of the concave joint portions may be formed as the characteristic pattern. it can.

  The present invention facilitates accurate measurement of random patterns.

It is the schematic which shows an example of embodiment of this invention. It is the schematic which shows the manufacturing method of the base material which has an uneven pattern same as the above. (A) of the above is explanatory drawing which shows an example of process data, (b) is explanatory drawing which shows an example of uneven | corrugated pattern data.

  Hereinafter, modes for carrying out the present invention will be described.

  The pattern measuring device and the pattern measuring method of the present invention measure a base material press-molded using a concavo-convex mold. For example, building materials such as outer wall materials and exterior materials can be measured. Specifically, a substrate made of a flat cement molded product is formed by extrusion molding or the like, and a concavo-convex pattern is formed on the surface of the substrate by pressing the concavo-convex mold on the surface of the substrate and press-molding it. can do.

  An example of the manufacturing method of the base material which has an uneven pattern in FIG. 2 is shown. The base material 30 is continuously extruded from the extrusion molding machine 31 onto the take-up conveyor belt 39, and thereafter conveyed by a conveyor 32 equipped with a roller, a conveyor belt, and the like. Further, a concavo-convex pattern is formed on the surface (upper surface) of the base material 30 by press molding using the concavo-convex mold 33. The concavo-convex mold 33 is formed in a roll shape, and is formed to be freely rotatable about a horizontal axis that is substantially orthogonal to the extrusion direction of the substrate 30. A plurality of protrusions 34 are formed on the circumferential surface of the concavo-convex mold 33 side by side in the circumferential direction. The concavo-convex mold 33 is disposed above the exit of the extrusion molding machine 31. In addition, an inclined portion 35 that is inclined obliquely downward is provided in the middle of the conveying device 32, and a cutting machine 36 that uses a water jet or the like is provided above the inclined portion 35.

  In manufacturing the substrate 30 having an uneven pattern, first, an uneven pattern is formed on the surface of the substrate 30 by the uneven mold 33 while continuously extruding a cement molding material or the like from the extruder 31 at a constant speed. To do. At that time, the concavo-convex mold 33 is pressed on the surface (upper surface) of the base material 30 while rotating at a speed synchronized with the extrusion speed and continuously press-molded. Here, a portion pressed by the protrusion 34 becomes a concave handle of the concavo-convex pattern, and a portion not pressed by the protrusion 34 becomes a convex handle 38. The concave handle can be formed by a plurality of concave joint portions 37. Each concave joint 37 can be formed in a long and narrow groove shape in the transport direction of the substrate 30 or in a direction orthogonal to the transport direction. Further, when the concave joint portion 37 is formed, the other portions are a plurality of convex handle portions 38 formed in a rectangular shape or the like in plan view. And every time the uneven | corrugated type | mold 33 rotates, the uneven | corrugated pattern of a fixed pattern will be repeatedly provided to the base material 30 continuously.

  Thus, the long base material 30 on which the concave / convex pattern is formed is cut into a predetermined length by the cutting machine 36. Next, the cut base material 30 is continuously transferred from the transfer machine 32 onto the tray 40 one by one. Thereafter, the base material 30 transferred to the tray 40 is conveyed to the next process such as a curing and curing process.

  As described above, the concavo-convex pattern formed on the surface of the base material 30 is not the same for all the base materials 30, but is formed as a random pattern in which the position of the concavo-convex pattern differs for each base material 30. That is, when a certain range of uneven patterns is compared from one end of each substrate 30, the uneven pattern in that range is different for each substrate 30. In addition, the uneven patterns of all the base materials 30 do not have to be different, and some of the base materials 30 (for example, a ratio of one per several sheets) may be formed in the same uneven pattern.

  As described above, one of the factors that cause the concave / convex pattern to be formed differently for each base material 30 is that the peripheral length of the concave / convex mold 33 coincides with an integral multiple of the total length in the transport direction of the cut base material 30. This is because there is not. For example, when the circumferential length of the concavo-convex mold 33 is 1319 mm and the cut length of the base material 30 is 3090 mm, the peripheral length of the concavo-convex mold 33 and the total length in the transport direction of the cut base material 30 are not integral multiples. In such a case, since the repeated pattern of the concave / convex pattern from one end of the cut base material 30 is different for each base material 30, there may be a random pattern in which the position of the concave / convex pattern is different for each base material 30. In addition, as another factor, the speed ratio between the conveyance speed of the base material 30 of the take-up conveyor belt 39 and the conveyance speed of the base material 30 of the conveyor 32 is important for the width standard dimension of the base material 30. The point which is changed arbitrarily also at the time of manufacture of substrate 30 is mentioned. Thereby, when the base material 30 is transferred from the take-up conveyor belt 39 to the transporter 32, the concavo-convex pattern from one end of the cut base material 30 is expanded and contracted at an arbitrary position of the long base material 30. A pattern may differ for every base material 30, and it may become a random pattern from which the position of an uneven pattern differs for every base material 30. FIG. Furthermore, another factor is that the substrate 30 after being cut is transported over a plurality of conveyors until the substrate 30 is transferred to the tray 40, and the transport speed of the substrate 30 is also approaching the tray 40. The number is gradually increasing. Thereby, when the base material 30 is conveyed to the conveyance machine 32, it expands and contracts, and the repeated pattern of the concave / convex pattern from one end of the cut base material 30 is different for each base material 30. There may be random patterns with different positions. Furthermore, as another factor, the point which a dimension changes at the time of the curing curing process of the base material 30 or drying is mentioned. Thereby, the base material 30 expands and contracts, and the repeated pattern of the concave and convex pattern from one end of the cut base material 30 is different for each base material 30, and the position of the concave and convex pattern is different for each base material 30. is there.

  The pattern measuring device of the present invention accurately measures the position of the concave / convex pattern of the base material 30 on which the random pattern as described above is formed for each base material 30. And if the position of the concavo-convex pattern of the base material 30 can be accurately measured, for example, the amount of expansion / contraction of the base material 30 can be calculated, and the data of the amount of expansion / contraction is obtained from the molding process of the base material 30 and the concavo-convex pattern. This can be fed back to the application process to improve the accuracy of each process, or can be used for controlling a feeding device in a subsequent process that is sent by the tray 40.

  FIG. 1 shows an example of a pattern measuring device. This pattern measuring device includes a part for actually measuring the base material 30 and a processing unit 10 for processing data obtained by the actual measurement. The processing unit 10 can be configured by an electronic computer such as a personal computer. The processing unit 10 is provided with processing data storage means 11 for storing the three-dimensional processing data of the concavo-convex mold 33. The three-dimensional processing data of the concavo-convex mold 33 includes the length dimension, the width dimension, the projecting dimension of the protrusion 34 provided on the concavo-convex mold 33, the interval between the adjacent protrusions 34, 34, and the like. This processed data can be composed of drawing data and the like used when the concave / convex mold 33 is created. The processing unit 10 is provided with a feature data storage unit 12 that stores data of an arbitrary feature s selected from the processed data. Here, the characteristic part s is a part of the concavo-convex mold 33 and refers to a part that forms a characteristic pattern (including a pattern) p serving as a reference when measuring the concavo-convex pattern of the substrate 30. For example, one protrusion 34 can be used as the feature s. The data of the feature portion s is the size and position of the feature portion s, and when the feature portion s is the protrusion 34, the length, width, protrusion size, position, and the like. Further, the processing unit 10 is provided with a concavo-convex pattern data storage means 13 for storing three-dimensional data obtained by measuring the concavo-convex pattern formed on the substrate 30 over the entire surface. The three-dimensional data obtained by measuring the entire surface of the concavo-convex pattern formed on the base material 30 is the length dimension, the width dimension, the protruding dimension of the convex pattern section 38 formed on the base material 30, and the adjacent convex pattern section 38. , 38, and the like, the length dimension, the width dimension, the depth dimension of the concave joint portion 37 formed on the base material 30, the spacing between the adjacent concave handle portions 37, 37, and the like. Further, the processing unit 10 calculates a deviation (difference) between the two data by comparing the processing data stored in the processing data storage unit 11 and the concavo-convex pattern data stored in the concavo-convex pattern data storage unit 13. The calculating means 14 is provided. The machining data storage means 11, the feature data storage means 12, and the concavo-convex pattern data storage means 13 can use a memory device of an electronic computer, and the calculation means 14 uses a central processing unit (CPU) of the electronic computer. Can be used.

  The camera 1 is provided in the part where the substrate 30 is actually measured. As the camera 1, a line camera, a high-speed 3D camera, or the like can be used. The camera 1 is connected to an image input unit 15 such as an image input board provided in the processing unit 10. A dedicated power source 16 can be connected to the camera 1. A conveying unit 2 is provided below the lens of the camera 1. The conveying means 2 can be formed by a belt conveyor, and can be formed by laying a belt 4 around a plurality of conveying rollers 3 in an endless loop shape. A drive motor 3a is provided in a part of the transport roller 3, and the belt 4 is formed so as to be able to advance by this drive. An encoder 3 b is provided on a part of the transport roller 3. The encoder 3 b is connected to a sensor input unit 16 provided in the processing unit 10. Data measured by the encoder 3b is input to the processing unit 10, and the traveling speed of the belt 4 can be measured using this data. The traveling speed of the belt 4 may be measured using a Doppler speed measuring machine instead of the encoder 3b or in combination with the encoder 3b. In addition, a pair of photosensors 6 are provided in the transport unit 2. The photosensors 6 are provided so as to face each other with the belt 4 sandwiched in the width direction (direction orthogonal to the traveling direction). The photosensor 6 is connected to a sensor input unit 17 provided in the processing unit 10. Further, an illumination means 5 such as line illumination is provided above the belt 4. A laser generator 7 is provided above the belt 4.

  And when measuring the position of an uneven | corrugated pattern using the above pattern measuring apparatuses, it carries out as follows. First, the type (variety) of the base material 30 to be subjected to pattern measurement is determined. Thereby, the three-dimensional processing data of the specific concave / convex mold 33 obtained by press-molding the base material 30 to be subjected to pattern measurement is obtained from the three-dimensional processing data of the plurality of types of concave / convex molds 33 stored in the processing data storage unit 11. Selected. Next, the feature part s is selected from the three-dimensional processing data of the selected specific uneven mold 33. The feature portion s can be arbitrarily selected as long as it has a detectable shape. For example, one protrusion 34 can be used as the feature portion s. Then, the three-dimensional data (specific part data) of the selected feature part s is input to and stored in the feature part data storage unit 12.

  Next, the concavo-convex pattern of the base material 30 that is the target of pattern measurement is acquired. In this case, after the base material 30 is cut to a standard size, it is cured and hardened, and further, a base-coated surface can be used. The base material 30 is placed on the belt 4 of the conveying means 2 and conveyed below the camera 1 as the belt 4 advances. And when the base material 30 passes under the camera 1, the uneven pattern of the base material 30 is imaged over the whole surface, and is measured. Image data obtained by this imaging is input to the image input unit 15, and digitized three-dimensional data of the uneven pattern can be obtained. The digitized three-dimensional data of the uneven pattern (uneven pattern data) is stored in the uneven pattern data storage means 13. In addition, as a method of taking a concavo-convex image of the base material 30, when a line camera is used, a shadow of a surface concavo-convex formed by line illumination (binarized to black and white) is used, and when a 3D camera is used, line laser light is used. Continuous imaging of surface irregularities. Further, data on the traveling speed of the belt 4 (conveying speed of the base material 30) obtained from the encoder 3b and the like is also input to the sensor input unit 16.

  Next, the feature data stored in the feature data storage unit 12 and the uneven pattern data stored in the uneven pattern data storage unit 13 are compared by the calculation unit 14. With this comparison, the photosensor 6 (in this embodiment, the tip of the substrate 30 to be conveyed is detected) input to the sensor input unit 16 and the end of the substrate 30 from the encoder 3b and the like are detected. Based on the data, the position of the feature pattern p from the one end of the substrate 30 (the portion formed on the substrate 30 by the feature s) is detected. Next, the machining data stored in the machining data storage unit 11 is compared with the concavo-convex pattern data stored in the concavo-convex pattern data storage unit 13 on the basis of the position of the feature pattern p. A deviation from the uneven pattern data is calculated by the calculation means 14. Thus, the position of the uneven pattern formed on the substrate 30 can be measured.

  FIG. 3A shows an example of the machining data. This processing data is a planar representation of the peripheral surface of the concavo-convex mold 33 having a peripheral length of 1319 mm. Reference numeral 20 is protrusion data indicating the protrusion 34. For example, the data of the characteristic part s is indicated by one protrusion data 20a. FIG. 3B shows an example of uneven pattern data. This concavo-convex pattern data represents the concavo-convex pattern data of the base material 30 press-molded by the concavo-convex mold 33 having the processing data of FIG. The base material 30 of the concavo-convex pattern data has a total length of 3030 mm in the longitudinal direction. The code | symbol 21 can be made into the data which shows the concave joint part 37, for example, and the code | symbol 22 can be made into the data which shows the convex pattern part 38, for example. Further, in this concavo-convex pattern data, data 21a of the characteristic pattern p press-molded at the characteristic part s appears. If the position x of the characteristic pattern p can be calculated from one end of the base material 30, the position of the characteristic pattern p becomes the starting position of the pattern pattern, and the convex pattern portion 38 or the concave pattern of the concave / convex pattern is based on the position of the characteristic pattern p. The position of the part 37 can be specified.

DESCRIPTION OF SYMBOLS 11 Process data storage means 12 Characteristic part data storage means 13 Concave / convex pattern data storage means 14 Calculation means 30 Base material 33 Concave / convex type

Claims (4)

A pattern measuring device for measuring a concavo-convex pattern of a base material press-molded using a concavo-convex mold,
Processing data storage means for storing the uneven three-dimensional processing data;
Feature data storage means for storing data of an arbitrary feature selected from the processed data;
A concavo-convex pattern data storage means for storing three-dimensional concavo-convex pattern data obtained by measuring the entire concavo-convex pattern formed on the substrate;
By comparing the feature data and the concavo-convex pattern data, it is detected where the feature pattern formed on the base material by the feature section appears from one end of the base material, and the detected feature by comparing the uneven pattern data and the processed data based on the position of the handle, and a calculating means for calculating a positional deviation between the processing data and the uneven pattern data, the positional deviation is the feature pattern A pattern measuring device characterized by being a positional shift of a convex pattern portion or a concave joint portion of the concave / convex pattern with reference to the position of the pattern.   The pattern measuring apparatus according to claim 1, wherein the concavo-convex mold is a roll-shaped concavo-convex mold, and the entire length of the base material is formed so as not to coincide with an integral multiple of the peripheral length of the concavo-convex mold. . A pattern measuring method for measuring an uneven pattern of a base material press-molded using an uneven mold,
Storing the uneven three-dimensional processing data in a processing data storage means;
Store the data of any feature selected from the processing data in the feature data storage means,
Storing the three-dimensional uneven pattern data obtained by measuring the entire uneven pattern formed on the substrate by the uneven pattern data storage means;
By comparing the feature data and the concavo-convex pattern data, it is detected where the feature pattern formed on the base material by the feature section appears from one end of the base material, and the detected feature By comparing the processed data with the concave / convex pattern data based on the position of the pattern, a positional deviation between the processed data and the concave / convex pattern data is calculated, and the positional deviation is based on the position of the characteristic pattern. A pattern measuring method characterized in that the pattern is a positional shift of a convex pattern portion or a concave joint portion of the concave / convex pattern . The said concave joint part is arranged in parallel by the direction substantially parallel to the conveyance direction of the said base material, and forms a part of said concave joint part as the said characteristic handle | pattern . Pattern measurement method.

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