KR100875456B1 - Sheet measurement method and system and measurement information management system - Google Patents

Abstract

The present invention relates to a sheet measuring method and system, and a measurement information management system according to the present invention, by taking an image of one side of the plate to be measured, image processing and analysis of the captured image data, the full width and length of the plate Straightness can be measured accurately and quickly.

In addition, the present invention processes and manages the measurement information of the plate measured through the plate measurement method and system as described above, and compares with the setting information, monitoring of the measurement object and the measuring device, such as plate, as well as, It is to provide a measurement information management method and system that can automatically correct abnormalities such as sheet cutting equipment and measurement equipment by monitoring information.

In addition, to provide a measurement information management method and system for processing and managing the measurement information and setting information, etc. to utilize as history information.

Therefore, the effect of improving the quality of the product together with the reliability and safety of the entire system can be expected.

Description

Plate measurement method and system and measurement information management system according to it {Method and system for plate measurement, system for management of measurement information by the same}

1 is a block diagram showing a general sheet cutting equipment.

2 is a block diagram showing an example of a sheet metal measuring system according to the present invention.

3 is a configuration diagram showing an example in which the plate measuring system according to the present invention is applied.

4 is a flowchart showing an example of a sheet measuring method according to the present invention.

FIG. 5 is a front view of the sheet metal measuring system shown in FIG. 2. FIG.

6 is a view showing an image photographed for measuring the plate material according to the present invention.

FIG. 7 is a plan view of the sheet metal measuring system shown in FIG. 2. FIG.

8 is a view showing a method for confirming the movement of the moving gantry for measuring the sheet material according to the present invention.

9 is a block diagram showing an example of a measurement information management system according to the present invention.

10 is a detailed configuration diagram of the measurement information management apparatus of FIG. 9.

                  <Description of Symbols for Main Parts of Drawings>

10: measurement control unit 21, 22: imaging device

31, 32: pointer 40: linear drive unit

50: measuring object 60: reference marker

90: sheet cutting equipment 93: gantry

94: gantry rail 98, 98 ': lattice work bench

100: operation control controller 200: measurement control device

300: linear drive unit 400: gantry

500: distance measuring device 600: imaging device

700: measurement information management device

The present invention relates to a sheet measuring method and system and a measurement information management system according to the present invention, and in more detail, to take an image of one side of the plate to be measured, and to accurately and quickly measure the processed image data by image processing and analysis. It is possible to monitor and measure the measurement objects and measuring devices such as plates by processing and managing the plate measurement method and system that can be used, and the measurement information of the plate measured using this, and comparing with the setting information. It is possible to automatically correct abnormalities of sheet cutting equipment and measuring equipment.

In general, the sheet cutting equipment is for cutting a plate such as a large abacus, etc., and is a device for cutting the plate by the numerical control based on the set numerical information.

1 shows an example of the sheet cutting equipment as described above, the conventional sheet cutting equipment 9, using a cutting device 1, such as a high power laser cutting device that moves along a path corresponding to the numerical information Cutting of the board | plate material 7 is performed.

The sheet cutting equipment 9 includes an information processing module (not shown) for positioning and continuous cutting, and includes a plurality of cutting devices 1 and a plurality of cutting devices to simultaneously perform a plurality of cutting operations. The linear driving unit 2 for moving (1) and the cutting device 1 and the linear driving unit 2 are mounted and include a gantry 3 moving in the cutting direction of the sheet.

Here, the gantry (3) is a movable pedestal in the form of a bridge or viaduct, and includes a drive gear box (5) capable of traveling along the extending direction of the gantry rail (4).

In addition, the linear driving unit 2 is installed on the upper surface of the gantry 3 to move the cutting device 1, the cutting device 1 is configured with a cutting head 6 for cutting the plate material .

On the other hand, in order to use the cut plate as described above to the ship structure, hull block, etc., measuring the full width (full width), full length (length), etc. with respect to the cut plate to the set information such as the desired shape and size It is necessary to check whether it is processed to fit, the operator is using the tape measure to measure the cut plate as described above.

However, when measuring the cut plate by a manual operation by the operator as described above, it takes a lot of time to check the plate cutting process, there is a problem that the accurate measurement is not made because the measurement results are different for each operator. .

Therefore, there is a need to make a quick and accurate measurement for the cut plate as described above.

The present invention has been made in accordance with the above-described demands, and image photographing one side of the plate to be measured, image processing and analysis of the photographed image data, to accurately and quickly determine the full width, length and straightness of the plate Plate measurement method and system that can be easily measured.

In addition, the present invention processes and manages the measurement information of the plate measured through the plate measurement method and system as described above, and compares with the setting information, monitoring of the measurement object and the measuring device, such as plate, as well as, It is to provide a measurement information management system that can automatically correct abnormalities such as sheet cutting equipment and measuring equipment by monitoring information.

The present invention also provides a measurement information management system for processing and managing the measurement information, setting information, and the like to use as history information.

In order to achieve the above object, the plate measuring method according to the present invention includes: a linear driving unit adjusting step of moving a second imaging device to photograph another side of the measurement object; Performing lens calibration of the first and second image pickup devices installed in the gantry of the sheet cutting equipment, and maintaining the first and second pointers respectively installed integrally with the side portions of the first and second image pickup devices in an operation standby state. An initialization step; A photographing step of photographing one side and the other side of the measurement object while advancing the gantry and storing it as image information in a memory of a measurement control unit; Comprising a calculation step of calculating the full width, the total length and the straightness of the measurement object, one side of the measurement object calculated using the image information on the distance between the first and second pointers for each moving distance of the linear drive unit And calculating the total width of the measurement object by summing the widths of the other sides, and adding the lengths of the upper and lower portions of the measurement object to the reference marker counting distance using the reference marker-related identifier. It is characterized by obtaining the straightness of the measurement relative to the relative distance between planting the same arrangement.

The plate measuring system according to the present invention includes: first and second imaging elements disposed on a bottom surface of the gantry of the sheet cutting equipment so as to photograph one side and the other side of the measurement object; First and second pointers integrally provided at sides of the image pickup device; A linear driving unit provided between the second image pickup device and a bottom surface of the gantry for moving the second image pickup device for photographing the other side of the measurement object; A plurality of reference markers arranged while maintaining an arrangement interval distance around the measurement object; And a memory for storing the linear driver, the image pickup device, a program for performing algorithms related to operation control of the pointer, and a measurement controller having a processor coupled to the memory to execute the program.

Therefore, the measurement with respect to the measurement object can be measured accurately and quickly.

In addition, the measurement information management system according to the present invention is to control the cutting of the plate by the setting information on the plate, and to control the operation of the gantry for information management and measurement path generation and measurement of the measurement of the cut plate material Operation control controller; A measurement control device for controlling the start and end of measurement by the imaging device along the measurement path generated by the operation control controller and generating measurement information for measuring the measurement object; And store setting information and measurement information on the measurement object, analyze the stored setting information and measurement information, provide monitoring information for each item, and manage calibration of the operation control controller, measurement control device, gantry, and imaging device. Characterized in that it comprises a measurement information management device.

Therefore, by comparing the setting information and the measurement information, it is possible to monitor the measurement object and the measurement device.

Hereinafter, with reference to the accompanying drawings, it will be described for the plate measuring method and system according to the present invention and the measurement information management system according to it. At this time, the plate cutting equipment to be described below can be variously modified by the needs of those skilled in the art, it is not limited to specific ones.

2 is a block diagram showing an example of a sheet measuring system according to the present invention, the operation control controller 100, the measurement control device 200, the linear drive device 300, the gantry 400, the distance measuring device 500 ), And an imaging device 600.

The operation control controller 100 controls the cutting of the plate by the cutting path of the plate, the information management and measurement path generation of the cut plate (measurement), and controls the operation of the gantry 400.

The measurement control apparatus 200 performs functions such as calculating measurement data for measurement objects, collecting measurement information, storing various data to be processed, and controlling start and end of measurement, such as the measurement control apparatus 200 as described above. Is installed on one side of the gantry 400 for effective control and measurement, but is not limited to this, it may also perform the function of the operation control controller 100 by a terminal (PC, etc.) of the administrator.

The linear driving device 300 adjusts the position (width, etc.) of the imaging device 600, and transmits a trigger signal for capturing an image of a measurement object to the imaging device 600.

The gantry 400 is equipped with equipment for cutting and measuring the plate, and configured to reciprocate around the plate, which is driven by the operational control controller 100, for a specific shape, function, operation It will be described in more detail below.

The distance measuring device 500 is for measuring the moving distance of the gantry 400, and may use a sensor such as a laser distance sensor (LDS), and also by image information photographed through the imaging device 600 described below. Since distance measurement is possible, various configurations and methods can be applied according to the needs of those skilled in the art.

The imaging device 600 is for acquiring at least one or more image information about one side of a measurement object (cut sheet material) to be measured, and may be configured as a CCD (Charge Coupled Device) camera or a COMS camera. have.

Looking at the operation of the plate measuring system according to the present invention configured as described above, when the cutting process of the plate is finished and the operation control controller 100 transmits a cutting end signal to the measurement control device 200 (S101), the measurement control device 200 requests information of the currently cut plate (hereinafter, referred to as a measurement object) to the operation control controller 100 (S102).

The operation control controller 100 transmits the information of the measurement object to the measurement control device 200 (S103), and the measurement control device 200 generates a measurement path based on the transmitted measurement information, and measures the measurement object. In order to move the imaging device 600 to the position to be photographed in order to transmit the control signal (width measurement information, etc.) of the measurement to the linear drive device 300 (S104).

The linear driving device 300 adjusts the position of the imaging device 600 according to the received control signal, and transmits the adjustment end signal to the measurement control device 200 when the position adjustment of the imaging device 600 is completed ( S105).

The measurement control device 200 having received the position adjustment completion of the imaging device 600 transmits a measurement start signal to the operation control controller 100 (S106), and the operation control controller 100 corresponds to the measurement start signal. The gantry driving signal is generated and transmitted to the gantry 400 (S107).

When the gantry 400 is moved by the gantry driving signal, the distance measuring device 500 measures the moving distance of the gantry 400 and transmits it to the linear driving device 300 (S108), and the linear driving device ( When the gantry 400 moves to the position where the measurement object is to be photographed, the gantry 400 transmits a trigger signal to the photographing apparatus 500 (S109).

The imaging apparatus 500 photographs an image of the measurement object by the photographing signal transmitted from the linear driving apparatus 300, and transmits the photographed image to the measurement control apparatus 200 (S110).

When all the photographing of the measurement object is completed, the operation control controller 100 transmits the gantry driving end signal to the measurement control device 200 and the gantry 400 (S111).

When the photographing of the measurement object is finished by the control as described above, the measurement control apparatus 200 calculates measurement information about the measurement object by processing and analyzing the photographed image.

Hereinafter, an example in which the plate measuring system according to the present invention is applied will be described. Herein, the following terms may be changed to substitutable terms in order to specifically apply the present invention in applying the above-described present invention to an example.

As shown in FIG. 3, the measurement control unit 10 of the sheet measuring apparatus of the sheet cutting equipment includes a main body such as a personal terminal (PC); An input device such as a keyboard and a mouse connected to an input terminal of the main body; With an output device such as a display device or a monitor connected to the output terminal of the main body, the full width, full length, and straightness of the measurement object 50 is displayed on the output device as a calculated value, and recorded, stored and managed on the main body. do.

The measurement control unit 10 is connected to the first and second imaging elements 21 and 22, the first and second pointers 31 and 32, and the linear driving unit 40, respectively, to capture the board and the A / D data board. And an input / output processing board (not shown) such as an image processing and driving controller such as a motor driving board and the like are provided on the main board of the main body.

The main body of the measurement control unit 10 receives CAD information input from the outside, so that the layout of the measurement object 50 can be grasped in advance. Here, the layout of the CAD information means theoretical dimension information such as a design rough and approximate width 4.7m, a full length 24m, etc., predetermined at the time of wearing.

The main body of the measurement control unit 10 stores a program that performs algorithms related to operation control of the first and second imaging elements 21 and 22, the first and second pointers 31 and 32, and the linear driver 40. And a processor coupled to the memory to execute the program.

The algorithm comprises an image processing algorithm including a lens calibration; An image recognition algorithm for recognizing the reference marker unit 60, a spot, and an edge; A motor driving algorithm for adjusting the moving distances S0 to Sn of the linear driving unit 40; A calculation algorithm for calculating measured values such as full width, full length, straightness, etc. of the measured object 50; Correction to grasp the shaking of the gantry 93 and the bending of the gantry rail 94 positioned below the gantry 93 based on the reference marker 60 in image information such as digital photographs acquired by shooting time or shooting frame. Algorithm and the like.

As the image recognition algorithm, a labeling algorithm for image recognition of the reference marker 60 or a spot, and a sobel algorithm for image recognition of the edge of the measurement object 50 are used.

In addition, the algorithm calculates the distance between two points by multiplying the distance ratio per pixel to be described below by the number of pixels between two points of the image information, and the angle between these two points by a predetermined arithmetic expression (eg, Pythagorean theorem). Calculation methods, such as calculating a.

In addition, the memory may contain various image processing information including image information generated during each shooting, reference marker index data, first to fourth recognition result data, and information for controlling the linear driver 40 (e.g., by actual measurement). The distance C between the first and second pointers 31 and 32 for each of the moving distances S0 to Sn of the linear driving unit 40 (see FIG. 4) and the like is recorded in the mass storage device.

As shown in Fig. 5, each of the first and second imaging elements 21 and 22, the first and the second, to be applied to a multi-work sheet cutting equipment having two lattice work benches 98 and 98 '. Two pointers 31 and 32 and a linear driving unit 40 may be prepared in two sets.

The distance C between the first and second pointers 31 and 32 according to the moving distances S0 to Sn of the linear driving unit 40 corresponds to the width of any one of the middle portions of the measurement object 50. It corresponds to a value known in advance by the actual measurement.

In this embodiment, an image coordinate system is used. In the video coordinate system, one pixel position of the image information may be the origin, and the other pixel position may be the endpoint.

The first and second image pickup devices 21 and 22 may be any one of a camera, a CCD, and a camcorder. The first and second image pickup devices 21 and 22 may be used in the present invention. It is an auto focusing function and an image capturing means capable of optimizing the scale.

For real-time measurement and fast measurement processing, the first and second imaging elements 21 and 22 are monochrome cameras having a resolution of 640 × 480 (300,000 pixels), and are selected from preset FOV 300 × 225 to 400 × 300. Either one is used, for example FOV 300 × 225.

The resolution of 640 × 480 means an image composed of the product of 640 pixels in the horizontal direction or the horizontal direction and 480 pixels in the vertical direction. Extract the number of pixels.

In addition, FOV 300 × 225 means 300 mm, which is the horizontal size of the actual area seen by the first and second image pickup devices 21 and 22, and 225 mm, which is the vertical size. It is used to calculate the distance ratio per piece. The ratio of distance per pixel is the ratio of the resolution corresponding to the number of pixels of the photo cell and the field of view (FOV) corresponding to the actual area seen by the first and second imaging devices 21 and 22. As the relationship, in the present embodiment, it means '0.4687' corresponding to a value obtained by dividing the FOV horizontal component value '300' by the resolution horizontal component value '640'. Here, the value obtained by dividing the FOV vertical component value '225' by the resolution vertical component value '480' is also '0.4687'.

Such a method of obtaining the distance between the two points facilitates real-time shooting and measurement, and is equally used for the full width, full length, straightness calculation or calculation of the measurement object 50.

The gantry 93 of the sheet cutting equipment 90 is positioned so that the first and second imaging elements 21 and 22 are positioned vertically above the measurement object 50 based on one side or the other side of the measurement object 50. With the bottom of; It is arrange | positioned at any one of the bottom surfaces of the linear guide block of the linear drive part 40 provided in the bottom surface of the gantry 93.

In the present invention, the linear driver 40 may be installed in both the first and second imaging elements 21 and 22, respectively, and thus the present invention may be applied to the measurement object 50 having a larger layout. .

The first and second pointers 31 and 32 are devices for emitting spots using a laser diode as a light source, and are integrally provided on the sides of the first and second imaging elements 21 and 22, respectively.

The spot is formed by projecting the laser light emitted from the light sources of the first and second pointers 31 and 32 onto the upper surface of the measurement object 50.

In this case, the first and second imaging elements 21 and 22 and the first and second pointers 31 and 32 may be formed on the virtual straight line, and the centers of the spots of the first and second pointers 31 and 32 may be different from each other. It is preferable to have a date setting structure in which the focus of the first and second imaging elements 21 and 22 is matched.

The linear drive unit 40 has a belt-type power transmission structure and a repeatability of 0.01 mm so as to linearly reciprocate the linear guide block on the linear drive rail by the servo motor in the X-axis direction of FIG. 3. Here, the linear drive rail is fixed to the bottom of the gantry 93, the second image pickup device 22 and the second pointer 32 is coupled to the linear guide block. As the servomotor of the linear drive unit 40 starts the motor by the motor drive command input from the measurement control unit 10, the moving distance of the linear guide block means a stroke between its initial position and the operating position. It provides the actuation force to perform reciprocating linear movement and stop within (S0 ~ Sn).

The measuring object 50 may be abacus having a theoretical electric field value of 24m, a full width value of 4.7m, or the like equivalent to be used for manufacturing a ship structure, a hull block, or the like. The measurement object 50 is measured while being placed on the lattice work bench 98 of the sheet cutting equipment 90.

The measurement object 50 has edges 50a, 50b, 50c, and 50d (see Fig. 6) which are the same as any one of the upper side, lower side, left side and right side thereof.

The reference markers 60 maintain the same arrangement interval distance (for example, 1 meter) between the reference markers 60 by using a laser distance sensor (not shown) used as a measurement tool at the time of manufacturing the embodiment of the present invention. While being disposed around the measurement object 50, preferably along the traveling direction of the gantry 93 at equal intervals.

Here, the periphery of the measurement object 50 may be an upper surface of the edge of the work table 98.

For the purpose of individual identification and recognition, each reference mark unit 60 has one of numbers, letters, symbols such as '+' marks, and bar codes, respectively, which are formed on the upper surface of the identifiers LR_0, LR_1, and LR_2 shown in FIG. 6. ~ LR_n).

Hereinafter, the plate measuring method of the plate cutting equipment will be described with reference to FIGS.

As shown in FIG. 4, when the system of the measurement control unit 10 is turned on, the system is connected to the information processing circuit unit of the sheet cutting equipment 90 to transmit the gantry progress command to the information processing circuit unit.

The measurement control unit 10 receives the CAD information of the measurement object 50 from the outside.

The measurement control unit 10 initializes the linear driver 40 for the second image pickup device 22, and then drives the motor to adjust the moving distances S0 to Sn of the linear driver 40 according to the input CAD information. The linear driver adjusting step S10 is performed corresponding to the algorithm.

For example, the measurement control unit 10 applies the layout of the measurement object 50 included in the CAD information (for example, a total width of 4.7 m) to the motor driving algorithm, so that the other side of the measurement object 50 has the second image pickup device ( The motor driving command for moving the linear guide block to be included in the photographing range of 22) is transmitted toward the linear driving part 40.

The linear driving unit 40 operates the motor in response to the motor driving command to position the second image pickup device 22 in the vertically upward space of the other side of the measurement object 50.

As such, as the photographing position of the second image pickup device 22 is adjusted for each CAD information of the measurement object 50, the measurement object 50 to be placed on the lattice work table 98 of the sheet cutting equipment 90 is different from each other. Even if it has a width specification, the measurement object 50 can be measured easily.

Thereafter, the measurement controller 10 performs an initialization step S12 of maintaining the first and second imaging devices 21 and 22 and the first and second pointers 31 and 32 in an operation standby state.

Here, the first and second pointers 31 and 32 form spots on the upper surface of the measurement object 50 using the light sources thereof, and the first and second image pickup elements 21 and 22 form 'FOV' including the spots. It becomes a state in which image information about an object in the body can be obtained.

In particular, the image processing and driving controller or the input / output processing board connected to the first and second image pickup devices 21 and 22 converts the analog image pickup signals of the first and second image pickup devices 21 and 22 into digital image information. Transfer to the processor of the measurement control unit 10.

Accordingly, the measurement controller 10 performs an image processing algorithm such as lens calibration on the received digital image information, and corrects the image information distorted by the lens in the same manner as the actual object.

Thereafter, the measurement control unit 10 transmits a gantry progress command for advancing the gantry 93 to the information processing circuit unit of the sheet cutting equipment 90 to perform a photographing step (S14).

In the photographing step (S14), the gantry 93 is advanced at a constant speed in response to the gantry progress command received from the information processing circuit unit of the sheet cutting equipment 90, and the first and second imaging devices 21 and 22 are provided. The measurement object 50 is photographed with the progress of the gantry 93.

For example, the first and second image capturing elements 21 and 22 capture image information such as 68 to 108 digital photographs corresponding to the photographing command of the measurement control unit 10, and then transfer the image information to the measurement control unit 10. , To be stored in the memory of the measurement control unit 10.

Each image information includes one side of the left reference measurement object 50, the other side of the right reference measurement object 50, and the measurement object (excluding the middle portion of the measurement object 50 placed on the lattice work table 98). Spots projected on the upper surface of 50 and reference markers 60 around the measurement object 50 are included.

Thereafter, the measurement control unit 10 performs the spot recognition step S16 by using the image information stored in the memory.

In the spot recognition step S16, the aforementioned labeling algorithm is performed to extract a pixel corresponding to the center position of the labeled spot region in real time as the center pixel of the spot, and store it as the first recognition result data. The center pixel of the spot may be a starting point of pixel counting.

In addition, the measurement control unit 10 performs the edge recognition step (S18) of the measurement object by using the image information received according to the shooting.

In the edge recognition step (S18), all edges shown in the image information are recognized through the Sobel algorithm of the Sobel algorithm, respectively, and counting the edges including the center pixel first met by starting counting from the center pixel of the spot, 50 is recognized as an edge of any one of an upper side, a lower side, a left side, and a right side, and is stored as second recognition result data. Here, the counting direction proceeds upward, downward, leftward, and rightward, and the edges of the upper side, the lower side, the left side, and the right side of the measurement object 50 are determined.

In addition, the measurement control unit 10 performs the reference marker recognition step (S20) using the input image information.

In the reference marker recognition step (S20), any one of numbers, letters, symbols such as '+' marks, and barcodes formed on the upper surface of the reference marker unit 60 is recognized and encoded, and each result value thus encoded is stored in the memory in advance. A first recognition process of individually recognizing the reference marker unit 60 as compared to the reference marker index data; Also, using the aforementioned labeling algorithm, a second recognition process of extracting the pixel corresponding to the center position of the labeled reference marker unit as the center pixel of the reference marker unit 60 is performed.

Information obtained through the first recognition process and the second recognition process are stored as third and fourth recognition result data.

Subsequently, the measurement controller 10 calculates the following measurement object width using the first to fourth recognition result data of the spot recognition step S16, the edge recognition step S18 of the measurement object, and the reference marker recognition step S20. In step S22, the measurement object length calculation step S26 and the measurement straightness calculation step S28 are performed.

Referring to FIGS. 4 to 6, when the measurement object full width calculation step S22 refers to the screen a by the first imaging device 21, the first pointer 31 of the spot recognition step S16 may be used. The number of pixels counted from the center pixel 31a for the associated spot to the left side edge 50a of the measurement object 50 in the edge recognition step S18 of the measurement product is multiplied by a distance ratio (for example, 0.4687) per pixel. The first temporary calculation process of calculating the width L of one side of the measurement object 50 is included.

In addition, referring to the screen (b) by the second image pickup device 22, the edge recognition step of the measurement object from the center pixel 32a for the spot associated with the second pointer 32 in the spot recognition step S16 ( The second temporary calculation process of calculating the width R of the other side of the measurement object 50 by multiplying the number of pixels counted to the right side edge 50b of the measurement object 50 by S18) Is performed.

As a result, the width (L, R) of each of the one side and the other side of the measurement object 50 is added to the distance C between the first and second pointers 31 and 32, which are known in advance, Since the full width W of 50) is calculated, at least the number of pixels counting at the middle of the measurement object 50 is minimized, and a very fast and accurate measurement value is calculated.

Subsequently, an operation control step (S14 to S22) of performing photographing, image recognition, and full width calculation is performed until the lower side edge pass of the measurement object is confirmed in the image information. Step S26 and the measurement straightness uplifting step S28 are performed.

4 to 7, the measurement object electric field calculation step S26 is recognized in the edge recognition step S18 of the measurement object based on the center pixel 31a for the spot associated with the first pointer 31. A reference marker such as a left identifier LR_0 near the upper edge 50c of the measurement object 50 and one recognized in the reference marker recognition step S20 of the measurement object 50. After extracting the horizontal line passing through the center in the horizontal direction, the pixel located on the straight line passing through the corner origin of the upper edge 50c and the left edge 50a among the straight lines between the horizontal line and the upper edge 50c. And counting the number, multiplying the distance ratio per pixel, and calculating a length Q_1 of the upper portion of the measurement object 50.

As shown in FIG. 7, the reference marker unit 60 may be distinguished from each other by the aforementioned identifiers LR_0, LR_1, and LR_2 to LR_n.

Accordingly, when the gantry 93 proceeds toward the lower side of the measurement object 50, the left identifier (50d) adjacent to the measurement object 50 and the lower side edge 50d around the measurement object 50 ( Based on the reference marker such as LR_n-1), the number of related pixels is counted similarly to the third temporary calculation process, and then multiplied by the distance ratio per pixel, thereby length (Q_2) of the lower part of the measurement object 50. A fourth temporary calculation process for calculating the is performed.

As a result, the measurement object length calculation step S26 may be performed between the reference marker unit 60 divided by the left identifier LR_0 of the third temporary calculation process and the left identifier LR_n-1 of the fourth temporary calculation process. Since the length Q_1 and Q_2 of the upper and lower portions of the measurement object 50 are added to the identifier using reference marker counting distance Q_0 indicating the distance, the total length W of the measurement object 50 is calculated. By minimizing the number of pixels counting at least for the intermediate portion of the measurement object 50, a very fast measurement value is calculated.

On the other hand, in the present invention, the measurement value related to the electric field as described above is used as the base of the cosine theorem, and corresponds to the angle between the left side edges 50a of the measurement object 50 based on an imaginary reference line passing through the reference marking part. Thus, when the inclination angle P to be calculated below is used as an angle between two sides of the cosine theorem, the total length of the measurement object 50 can be calculated more precisely.

That is, the overall length of the measurement object 50 is the inclination length f2 of the same arrangement interval distance f1 of the respective reference markers 60 along the extension direction of the left side edge 50a of the measurement object 50, respectively. It is good to calculate and sum.

Referring to FIGS. 4 and 7, the straightness calculation step S28 of the measured object calculates the straightness of the corresponding edge of the measured object 50 relative to the same arrangement interval distance f1 between the reference mark units 60. It's a step.

For example, the measurement straightness calculation step S28 uses the reference markers identified by the left identifiers LR_0 to LR_n in the reference marker unit 60.

Here, a fifth operation for calculating the intervals W_1 and W_2 between the left side edge 50a of the measurement object 50 and the predetermined left identifiers LR_1 and LR_2 for each reference marker unit by the number of pixels and the distance ratio per pixel Perform a temporary calculation process.

Subsequently, the calculated value obtained by subtracting the interval W_1 between the small values from the large value of the interval W_2 is set as the base of the right triangle, and is arranged identically between the reference marker units such as the predetermined left identifiers LR_1 and LR_2. A sixth temporary calculation process is performed in which the distance distance f1 is the side of the right triangle, and the inclination length f2 and the inclination angle P therebetween are calculated by using a general arithmetic formula such as Pythagorean theorem. .

Such a process is performed by summing values obtained for each section of the reference markers LR_0 to LR_n along the advancing direction of the gantry 93 (the Y-axis direction of FIG. 2), and the left side edge 50a of the measurement object 50. ), The overall straightness can be calculated.

On the other hand, in the same way as above, the overall straightness of the upper side edge 50c is calculated through the relationship between the upper side identifiers UR_1 and UR_2 of the reference mark and the upper side edge 50c, and also the right side edge 50b The overall straightness is also calculated through the relationship between the right identifiers RR_1 and RR_2 and the right side edge 50b.

Further, the straightness of the left side edge 50a or the right side edge 50b can also be calculated based on the center pixels 31a and 32a for the spots associated with the first and second pointers 31 and 32 as the reference point. Can be.

For example, when the gantry 93 proceeds, the center pixel 32a for the spot associated with the second pointer 32 extracts a virtual straight line along the travel direction of the gantry 93.

The intervals W_3 and W_4 between the virtual straight line and the right side edge 50b of the measurement object 50 are obtained for each section of each of the reference markers, such as the left identifiers LR_0 to LR_n, and the intervals between them W_3. , W_4) are calculated by the number of pixels and the distance ratio per pixel, respectively.

Thereafter, similarly to the sixth temporary calculation process, the inclination length and the inclination angle of the right side edge 50b are calculated, so that the straightness of the right side edge 50b is calculated.

As described above, various calculated values such as full width, full length, and straightness are stored in the memory (S30), and when the measurement, calculation, and storage of the information on the measured object are completed, the photographing is stopped (S32).

As shown in Fig. 8, the measurement control unit checks that the captured image information is different in relation to the shaking that can occur during the progress of the gantry or the gantry rail bending.

For example, compared to image information such as '(c)', image information of '(d)' photographed after a predetermined time interval passes, for example, is photographed while the gantry is shaken to the left.

The measurement control unit compares and checks the image information having the difference, and detects the gantry shaking or the bending value G of the rail based on a reference marker such as the left identifiers LR_n-1 and LR_n for each shooting time or shooting frame. do.

Here, the reference line T of the reference marker coordinate system refers to an imaginary line connected along the center pixel of the reference marker portion. Therefore, the gantry shake or the warp value G of the rail is understood as the distance between the reference line T of the reference marker coordinate system and the reference marker. The gantry shaking or the warpage value G of the lane is used as an important data for the maintenance of the gantry, the error correction due to the change in the angle of view of the image information related to the first and second image capturing with the gantry.

9 is a block diagram showing an example of a measurement information management system according to the present invention, and stores setting information (information set for cutting) on a measurement object and measurement information calculated by photographing and image processing as described above. The measurement information management apparatus 700 to be managed is included in the sheet metal measuring system of the present invention shown in FIG. 2.

As described above, the measurement information management apparatus 700 according to the present invention includes a data processing unit 710, a shape information DB 720, an NC file DB 730, a measurement data DB 740, and a process. The management unit 750, the impact management unit 760, the tolerance management unit 770, and the measurement device management unit 780 are configured to be included.

The data processor 710 processes and analyzes the data stored in the shape information DB 720, the NC file DB 730, and the measurement data DB 740, and includes a process manager 750, an impact manager 760, and a tolerance. The management unit 770 and the measurement device management unit 780 performs a function of providing the corresponding information.

The shape information DB 720 stores geometric feature information about items such as width and length of a measurement object, and shape information such as an outline shape of the measurement object.

The NC file DB 730 stores numerical values for each item of measurement, and includes a cutting NC file, a marking NC file, and the like. For example, the cut NC file stores information such as the width of the end plate and the length of the end plate, and the marking NC file stores the width of the plywood, the length of the plywood, the diagonal of the plywood, the number of long papers, the length of the long paper, and the like. do. Here, the information stored in the shape information DB 720 and the NC file DB 730 is setting information.

The measurement data DB 740 stores measurement information of the measurement object measured by the measurement system of the present invention.

The data stored in the shape information DB 720, the NC file DB 730, and the measurement data DB 740 are processed by the data processing unit 710 to extract and process the data for each item according to the requirements of those skilled in the art. Each part of the is provided.

The process management unit 750 performs process capability evaluation such as measurement time and accuracy, process control for each member for products such as measured materials, and abnormal history management such as whether or not each device is abnormal.

The influence management unit 760 calculates and manages the F-index for each process influence, and various factors may be applied by those skilled in the art.

The tolerance management unit 770 is to manage the tolerance of the design stage in consideration of the shrinkage and deformation of the workpiece according to each process.

The measuring device management unit 780 manages information of a measuring instrument for measuring a measuring object, calibration and evaluation plan of the measuring instrument, inspection status of the measuring instrument, measuring instrument evaluation report, and the like.

In addition, the process management unit 750, the impact management unit 760, the tolerance management unit 770, and the measurement device management unit 780 as described above output the management result to a separate output device (for example, a screen output device such as an LCD). ; Not shown).

Therefore, by measuring and comparing the measurement information and the setting information for the measurement object to manage the measurement object, each process, the measurement device, it becomes possible to monitor the system and the measurement object.

In addition, as the abnormal history management becomes possible, by correcting before the cutting step of the measurement object for the error of the measurement device, it is possible to minimize the error generated during cutting.

The plate measurement method and system and the measurement information management system according to the present invention has been described above. Naturally, such a technical configuration of the present invention can be implemented by those skilled in the art to other specific forms including the technical idea or essential features.

Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.

As described above, the present invention can image the one side of the plate to be measured, image processing and analysis of the captured image data, it is possible to accurately and quickly measure the full width, length and straightness of the plate Therefore, it is possible to reduce measurement deviation by automating manual measurement using a tape measure and to improve the measurement working environment.

In particular, the present invention, while the measurement equipment can use the plate cutting equipment as it is, it is possible to perform a high-precision measurement, there is an advantage that can be performed simultaneously with the cutting of the plate and the measurement with the efficiency of the equipment installation area.

In addition, the present invention processes and manages the measurement information of the plate measured through the plate measurement method and system as described above, and compares with the setting information, monitoring the measurement object and the measurement device such as the plate, as well as In addition, it is possible to automatically correct abnormalities of sheet cutting equipment and measuring equipment by monitoring information.

In addition, by processing and managing the measurement information and setting information, it is possible to use as history information.

Therefore, there is an effect that can improve the quality of the product along with the reliability and safety of the entire system.

Claims (13)

As a plate measuring method of the sheet cutting equipment for performing the measurement of the measurement object to the measurement control unit, A linear driving unit adjusting step of moving the second image pickup device to photograph the other side of the measurement object; Performing lens calibration of the first and second image pickup devices installed in the gantry of the sheet cutting equipment, and maintaining the first and second pointers respectively installed integrally with the side portions of the first and second image pickup devices in an operation standby state. An initialization step; A photographing step of photographing one side and the other side of the measurement object while advancing the gantry and storing it as image information in a memory of a measurement control unit; Computing step of calculating the full width and the total length and straightness of the measurement, The full width of the measurement object is obtained by adding the widths of the one side and the other side of the measurement object calculated using the image information to the distance between the first and second pointers for each moving distance of the linear driving unit. The total length of the measurement object is obtained by adding the lengths of the upper and lower portions of the measurement object to the identifier use reference marker counting distance. A plate measuring method characterized in that the straightness of the measured object relative to the basis of the same distance between the distance between the reference marker portion. The method of claim 1, And after the calculating step, an operation control step of performing photographing, image recognition, and calculation until the lower side edge passage of the measurement object is confirmed in the image information. The method of claim 1, The linear driving unit adjusting step, And operating the motor of the linear drive part in response to a motor driving command of the measurement control part, thereby placing the second image pickup device in a vertical upward space of the other side of the measurement object. The method of claim 1, The photographing step, And moving in the direction in which the gantry travels, photographing according to a photographing command of the measurement control unit. The method of claim 1, In the image information, a labeling algorithm and a sobel algorithm are applied to determine center pixels of spots by the first and second pointers, edges of the measurement object, and reference markers around the measurement object. A plate measuring method characterized by detecting. The method of claim 5, The calculating step, And calculating the distance between the center pixels by multiplying the number of pixels between the center pixels by a distance ratio per pixel. In the sheet measuring apparatus of the sheet cutting equipment for performing the measurement of the measurement object, First and second imaging elements disposed on a bottom surface of the gantry of the sheet cutting equipment so as to photograph one side and the other side of the measurement object; First and second pointers integrally provided at sides of the image pickup device; A linear driving unit provided between the second image pickup device and a bottom surface of the gantry for moving the second image pickup device for photographing the other side of the measurement object; A plurality of reference markers arranged while maintaining an arrangement interval distance around the measurement object; And a measurement control unit having a memory configured to execute the algorithm related to operation control of the pointer, the image pickup device, and the pointer, and a processor coupled to the memory to execute the program. The method of claim 7, wherein The algorithm comprises an image processing algorithm including lens calibration; An image recognition algorithm for recognizing a spot formed on the measurement unit by the reference marker, the pointer, and an edge of the measurement object; A motor driving algorithm for adjusting the moving distance of the linear driving unit; A calculation algorithm for calculating measured values including full width, full length, and straightness of the measured object; The measurement object may include any one of a correction algorithm for detecting the shaking of the gantry and the bending of the gantry rail located below the gantry based on the reference marker in image information such as a digital photograph obtained by shooting time or shooting frame. A plate measurement system, characterized in that to measure the overall length, width, and straightness of the measurement object without photographing the intermediate portion. The method of claim 7, wherein Plate reference system, characterized in that at least one of the numbers, letters, symbols, bar codes are formed on the upper surface of the reference marker. An operation control controller for controlling the cutting of the sheet by setting information on the sheet, and controlling the operation of the gantry for information management and measurement path generation and measurement of the measurement of the cut sheet; A measurement control device for controlling the start and end of measurement by the imaging device along the measurement path generated by the operation control controller and generating measurement information for measuring the measurement object; And Storing setting information and measurement information on the measurement object, analyzing the stored setting information and measurement information to provide monitoring information for each item, and managing calibration of the operation control controller, measurement control device, gantry, and imaging device. Measurement information management system including a measurement information management device. The method of claim 10, The measurement information management device, A shape information DB for storing geometric feature information of the measurement object and outline shape information of the measurement object among setting information; NC file DB for storing numerical information for each item of the measurement object of the setting information; A measurement data DB for storing measurement information generated by the measurement control device; And And a data processing unit which analyzes and compares the setting information stored in the shape information DB and the NC file DB and the measurement information stored in the measurement data DB for each item. The method of claim 11, The NC file DB, A cutting NC file that stores information about the width of the plate and the length of the plate; And a marking NC file for storing at least one of the width of the plywood, the length of the plywood, the diagonal of the plywood, the number of long papers, and the spacing of long papers. The method of claim 10, The measurement information management device, A data processing unit for processing the items by analyzing and comparing the setting information and the measurement information; A process management unit for managing an item for process capability evaluation of a product including a measurement object, a process for each member, and an abnormality of respective devices among items processed by the data processing unit; An impact management unit for calculating and managing an impact level index for each process degree among the items processed by the data processing unit; Tolerance management unit for managing the tolerance of the design step in consideration of the shrinkage and deformation of the measurement object according to each process of the items processed by the data processing unit; And Among the items processed by the data processing unit, the measuring device management unit for managing at least one of information of the measuring instrument to measure the measurement, calibration and evaluation plan of the measuring instrument, calibration status of the measuring instrument, measuring instrument evaluation report Instrumentation information management system.

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