Ceramic tile geometry parameter automatic measuring device

Abstract

The utility model provides a kind of ceramic tile geometric quantity parameter automatic measuring device, it is related to ceramic tile detection technical field, the device is provided with laser displacement sensor system on two-axis gantry module, and laser displacement sensor system is located above ceramic tile;Machine vision measurement system is provided with in the top of platform by fixing frame, and machine vision measurement system is located above ceramic tile;Control system is provided with on the side of box, control system is connected with two-axis gantry module, laser displacement sensor system and machine vision measurement system respectively;The utility model is cooperated with two-axis gantry module, laser displacement sensor and machine vision measurement system, realizes the automatic measurement of ceramic tile geometric quantity multiple parameters, and improves measurement precision;Through laser displacement sensor and machine vision measurement system setting above ceramic tile, using non-contact automatic detection mode, without direct contact with ceramic tile surface, avoid to be measured ceramic tile surface damage.

Description

Technical Field

[0001] This utility model relates to the field of ceramic tile testing technology, and in particular to an automatic measuring device for geometric parameters of ceramic tiles. Background Technology

[0002] An automatic measuring device for geometric parameters of ceramic tiles is used to automatically measure geometric parameters such as length, width, edge straightness, and right angle of ceramic tiles. Currently, my country's standard "Test Methods for Ceramic Tiles Part 2: Inspection of Dimensions and Surface Quality" (GB / T3810.2-2016) clearly specifies the inspection methods for the dimensions and surface quality of ceramic tiles.

[0003] Currently, the measuring devices used in laboratories generally have the following problems: First, manual inspection is currently carried out using inspection benches and dial gauges for reading, resulting in low accuracy, and there is no automated equipment for measurement; second, the measuring device comes into contact with the surface of the ceramic tile being tested during inspection, which can easily cause surface scratches; third, the inspection process is cumbersome and inefficient. Summary of the Invention

[0004] This invention proposes an automatic measuring device for geometric parameters of ceramic tiles, aiming to solve the problems of existing measuring devices easily causing scratches on the surface of ceramic tiles and requiring manual inspection, resulting in low detection accuracy.

[0005] This utility model provides an automatic measuring device for geometric parameters of ceramic bricks. The measuring device has a platform on its housing, and three equal-height supports and a two-axis gantry module are set on the platform. The three equal-height supports form a plane that is not on the same straight line. Ceramic bricks are placed on top of the equal-height supports. The two-axis gantry module is set on the periphery of the equal-height supports.

[0006] A laser displacement sensor system is installed on the two-axis gantry module, and the laser displacement sensor system is located above the ceramic tile;

[0007] A machine vision measurement system is mounted on the platform via a fixed frame, and the machine vision measurement system is located above the ceramic tile.

[0008] A PLC control system is installed inside the enclosure. The PLC control system is connected to the control system on the side of the enclosure, and the PLC control system is also connected to the two-axis gantry module, the laser displacement sensor system, and the machine vision measurement system.

[0009] Furthermore, the two-axis gantry module consists of two X-axis guide rails and one Y-axis guide rail, and the sliders on the three guide rails are moved by servo motors.

[0010] Furthermore, the laser displacement sensor system includes: a laser displacement sensor, a sensor bracket, and a laser sensor adjustment frame;

[0011] The laser displacement sensor is fixed to the slider on the Y-axis of the two-axis gantry module via a sensor bracket and a laser sensor adjustment bracket.

[0012] Furthermore, the machine vision measurement system includes: a CCD camera, a lens, a camera mount, a light source system, and a light source fixing plate;

[0013] The CCD camera is connected to the lens and fixed to the mounting bracket via a camera holder;

[0014] The light source system is mounted on the mounting bracket and located around the CCD camera via a light source fixing plate.

[0015] Furthermore, the CCD camera, lens, and light source system are located directly above the ceramic tile;

[0016] A through hole is provided at the center of the light source system, and the lens extends into the through hole.

[0017] Furthermore, the control system includes: a cantilever beam, a control box, an industrial panel PC, and servo drives;

[0018] The control box is fixed to one side of the enclosure via a cantilever beam.

[0019] The industrial panel PC is fixed to the front of the control box with screws, and the industrial panel PC is connected to the PLC control system and CCD camera via cables;

[0020] The servo drive is fixed inside the housing, and the servo motors of the two-axis gantry module are connected to the servo drive via cables.

[0021] Furthermore, the PLC control system is located inside the enclosure, and is connected to the laser displacement sensor, servo driver, and light source system via cables.

[0022] Furthermore, multiple feet are installed at the bottom of the enclosure.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] 1. This utility model adopts industrial tablet computer touch screen control, which is convenient for experimental personnel to operate.

[0025] 2. This utility model uses a two-axis gantry module, a laser displacement sensor and a machine vision measurement system to achieve automated measurement of multiple geometric parameters of ceramic tiles, thereby improving measurement accuracy.

[0026] 3. This utility model adopts a non-contact automatic detection method, which does not require direct contact with the surface of ceramic tiles, thus avoiding damage to the surface of the ceramic tiles being tested.

[0027] 4. The device of this utility model has a simple structure and a high degree of automation. It replaces the manual inspection table for measurement, greatly reducing labor intensity and improving work efficiency.

[0028] 5. It can automatically measure the edge length, right angle, edge straightness, and flatness (center curvature, edge curvature, and warping parameters) of ceramic tiles; the range of ceramic tile measurement sample specifications is wide, with good adaptability and flexibility. Attached Figure Description

[0029] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0030] Figure 1 This is an overall schematic diagram of the automatic measuring device for geometric parameters of ceramic bricks according to this utility model;

[0031] Figure 2 This is a front view of the automatic measuring device for geometric parameters of ceramic bricks according to this utility model;

[0032] Figure 3 This is a top view schematic diagram of the automatic measuring device for geometric parameters of ceramic bricks according to this utility model;

[0033] Figure 4 This is a schematic diagram of the machine vision measurement system for the automatic measurement device of geometric parameters of ceramic bricks according to this utility model;

[0034] Figure 5 yes Figure 2 middle Enlarged view of the structure;

[0035] Figure 6 yes Figure 4 middle Enlarged view of the structure;

[0036] Figure 7 This is a schematic diagram of the control connection of the automatic measurement device for geometric parameters of ceramic bricks according to this utility model.

[0037] In the diagram: 1. Housing; 101. Sheet metal shell; 102. Foot; 2. Platform; 3. Equal height support column; 4. Two-axis gantry module; 401. X-axis guide rail; 402. Y-axis guide rail; 5. Laser displacement sensor system; 501. Laser displacement sensor; 502. Sensor bracket; 503. Laser sensor adjustment bracket; 6. Machine vision measurement system; 601. CCD camera; 602. Lens; 603. Camera bracket; 604. Light source system; 605. Light source fixing plate; 606. Fixing frame; 7. Control system; 701. Cantilever beam; 702. Control box; 703. Industrial panel PC; 704. PLC control system; 705. Servo driver. Detailed Implementation

[0038] The exemplary embodiments disclosed in this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0039] This utility model provides an automatic measuring device for geometric parameters of ceramic bricks, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the system includes a housing 1, a platform 2, leveling supports 3, a two-axis gantry module 4, a laser displacement sensor system 5, a machine vision measurement system 6, and a control system 7. The platform 2 is located on the upper part of the housing 1 and is fixed to the frame of the housing 1 with screws. The two-axis gantry module 4 is placed on the upper part of the platform 2 and is fixed to the upper part of the platform 2 with screws. The laser displacement sensor system 5 is fixed on the Y-axis guide rail 402 of the two-axis gantry module 4. The machine vision measurement system 6 is placed on the upper part of the platform 2 through a mounting bracket 606. The control system 7 is located on the right side of the housing 1. At least three leveling supports 3 are placed on the platform 2. The three leveling supports 3 form an ideal plane through three points that are not on the same straight line. The two-axis gantry module 4, the laser displacement sensor system 5, and the machine vision measurement system 6 work together and are controlled by a PLC control system 704 and an industrial tablet PC 703 to realize the automated measurement of the geometric parameters of ceramic tiles.

[0040] like Figure 2 and Figure 7As shown, the servo motor and servo driver 705 of the two-axis gantry module 4 are connected by a cable. The laser displacement sensor 501, servo driver 705, and light source system 604 are all connected to the PLC control system 704 by a cable. The CCD camera 601, PLC control system 704 and industrial panel PC 703 are connected by a cable.

[0041] like Figure 2 As shown, the housing 1 is composed of a sheet metal shell 101 and feet 102; the sheet metal shell 101 is a frame structure covering sheet metal, and the frame is welded from Q235B square tubes 50×3, and stress relief treatment is performed after welding to reduce frame deformation; the sheet metal shell 101 is equipped with a door to facilitate equipment maintenance and installation; four feet 102 are installed at the bottom to facilitate leveling of the device to ensure the accuracy of the device.

[0042] like Figure 6 As shown, the machine vision measurement system 6 includes a CCD camera 601, a lens 602, a camera bracket 603, a light source system 604, and a light source fixing plate 605. The lens 602 is connected to the CCD camera 601, and the CCD camera 601 is fixed to the middle of the mounting frame 606 via the camera bracket 603, ensuring that the lens 602 can see the entire area of ​​the ceramic tile, reducing measurement errors caused by viewing angle shift. The light source system 604 is fixed to the bottom of the top of the mounting frame 606 via the light source fixing plate 605 and illuminates vertically, providing uniform illumination to the ceramic tile, eliminating ambient light interference and surface reflection, and providing high-quality raw data for subsequent image processing. The machine vision measurement system 6 is placed above the ceramic tile being measured, automatically taking pictures of the ceramic tile vertically, identifying obvious defects, contour dimensions, and position information on the surface of the ceramic tile, and establishing the relative X and Y coordinates between the ceramic tile being measured and the two-axis gantry module 4, so that the laser displacement sensor system 5 can quickly position itself on the ceramic tile for measurement, saving time and improving efficiency.

[0043] To ensure the quality of the captured images and reduce the influence of ambient light, a light source system 604 is installed on the top of the device. The light source system 604 is a 1100x1100mm light guide type open surface light source with a 50mm center opening.

[0044] The two-axis gantry module 4 consists of a dual X-axis guide rail 401 and a single Y-axis guide rail 402, and is driven and controlled by a servo motor. The servo motor is connected to the servo driver 705 via a cable. The travel of both the X-axis guide rail 401 and the Y-axis guide rail 402 is 1000mm, and the repeatability is ±0.02mm.

[0045] The 606 mounting bracket is assembled from aluminum profiles.

[0046] like Figure 5As shown, the laser displacement sensor 501 is fixed on the slider of the Y-axis guide rail 402 of the two-axis gantry module 4 through the sensor bracket 502 and the laser sensor adjustment bracket 503. It moves along the X direction with the Y-axis, and at the same time, the Y-axis drives the laser displacement sensor 501 to move along the Y direction, so as to achieve full coverage of the measurement area of ​​the ceramic tile being measured.

[0047] When measuring the flatness parameters of ceramic tiles (center curvature, edge curvature, and warpage parameters), first select any three of the four vertices of the ceramic tile to be measured, with a distance of 10mm from the edge of the ceramic tile, as measurement points. The laser displacement sensor 501 measures the height of these three points to form an assumed measurement reference surface for the ceramic tile to be measured. Then, measure the height values ​​of the measurement points for the center curvature, edge curvature, and warpage parameters respectively. Combine the two-dimensional motion (X, Y) of the two-axis gantry module 4 with the distance measurement (Z) to measure and record the measurement point data, and then analyze and calculate the flatness parameters (center curvature, edge curvature, and warpage parameters) of the ceramic tile to be measured.

[0048] like Figure 2 As shown, the control system 7 consists of a cantilever beam 701, a control box 702, an industrial panel PC 703, and a servo driver 705. The industrial panel PC 703 is fixed to the front of the control box 702 with screws. The control box 702 panel is equipped with a power switch, an emergency stop switch, and two USB ports.

[0049] The cantilever beam 701 is made of aluminum alloy, and the control box 702 panel is equipped with an emergency stop switch. In case of abnormality, it can stop in an emergency to protect personnel and equipment and improve the convenience of human-machine interaction.

[0050] The industrial panel PC 703 is fixed to the front of the control box 702 with screws, serving as a human-machine interface. The industrial panel PC 703 is an Advantech PPC-310-EHL, which is controlled by the touch screen in the Advantech industrial panel PC 703, making operation simpler and improving testing speed.

[0051] The PLC control system 704 and servo driver 705 are mounted on the upper part of the electrical panel and fixed inside the housing 1. They are connected to the industrial panel PC 703 through cables passing through the housing 1 and the cantilever beam 701 pipe. They control and position the motion of the two-axis gantry module 4 and realize the movement and measurement of the laser displacement sensor system 5.

[0052] The machine vision measurement system 6 takes pictures of the ceramic tile being tested and transmits the pictures to the industrial tablet PC 703 via an interface cable. The image software in the industrial tablet PC 703 analyzes and processes the images to identify obvious defects, contour dimensions, and position information on the surface of the ceramic tile being tested, and establishes the relative X and Y coordinates between the ceramic tile being tested and the two-axis gantry module 4. Based on the coordinates established by the ceramic tile being tested, the control system 7 automatically plans the path according to the measurement position or path required by the GB / T3810.2-2016 standard. The PLC control system 704 automatically controls the two-axis gantry module 4 to drive the laser displacement sensor system 5 to measure the distance between itself and the surface of the ceramic tile being tested. The two-dimensional motion (X, Y) of the two-axis gantry module 4 is combined with the distance measurement (Z) to measure and record the measurement point data, and then analyze and calculate the length, width, edge straightness, right angle, and flatness (center curvature, edge curvature, and warping parameters) of the ceramic tile being tested.

[0053] Implementation Process: During use, three equal-height supports 3 are placed on platform 2, not on the same straight line, forming an ideal plane. The checkerboard calibration plate is then placed on the equal-height supports 3 to complete the calibration of the machine vision measurement system 6. After calibration, the ceramic tile to be tested is replaced with the checkerboard calibration plate and placed on the three equal-height supports 3. The machine vision measurement system 6 automatically takes pictures of the ceramic tile vertically. The acquired images of the ceramic tile are transmitted to the industrial tablet PC 703 via an interface cable. The image software in the industrial tablet PC 703 analyzes and processes the images, identifying obvious defects, contour dimensions, and position information on the surface of the ceramic tile, and establishing the relative X and Y coordinates between the ceramic tile and the two-axis gantry module 4. Based on the coordinates established by the ceramic tile, the software of the control system 7 operates according to the measurement standards in GB / T3810.2-2016. The method automatically plans the path and automatically controls the two-axis gantry module 4 to drive the laser displacement sensor system 5 to measure the distance between itself and the surface of the ceramic tile being measured. It combines the two-dimensional motion (X, Y) of the two-axis gantry module 4 with the distance measurement (Z) to measure and record the measurement point data, and then analyze and calculate the length, width, edge straightness, right angle, and flatness (center curvature, edge curvature, and warping parameters) of the ceramic tile being measured. After the measurement is completed, the X and Y axes with the laser displacement sensor system 5 return to the origin position. The equipment is started by the switch button on the front of the control box 702 of the control system 7. The PLC control system 704 controls the movement of the two-axis gantry module 4. The industrial tablet computer 703 performs data acquisition and processing and also serves as a human-machine interface. It adopts touch screen control for convenient operation by experimental personnel, thereby completing the automatic measurement of the geometric parameters of the ceramic tile.

[0054] It should be noted that the specific models and specifications of the servo motor, laser displacement sensor 501, CCD camera 601, lens 602, servo driver 705, and PLC control system 704 need to be selected and determined according to the actual specifications of the device, and their internal structure is existing technology.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An automatic measuring device for geometric parameters of ceramic bricks, characterized in that, The measuring device has a platform (2) on its housing (1), and three equal-height supports (3) and a two-axis gantry module (4) are set on the platform (2). The three equal-height supports (3) form a plane that is not on the same straight line. Ceramic bricks are placed above the equal-height supports (3). The two-axis gantry module (4) is set on the periphery of the equal-height supports (3). A laser displacement sensor system (5) is installed on the two-axis gantry module (4), and the laser displacement sensor system (5) is located above the ceramic tile; A machine vision measurement system (6) is installed above the platform (2) via a mounting bracket (606), and the machine vision measurement system (6) is located above the ceramic tile; A PLC control system (704) is installed inside the housing (1). The PLC control system (704) is connected to the control system (7) on the side of the housing (1). The PLC control system (704) is also connected to the two-axis gantry module (4), the laser displacement sensor system (5), and the machine vision measurement system (6).

2. The automatic measuring device for geometric parameters of ceramic bricks according to claim 1, characterized in that, The two-axis gantry module (4) consists of two X-axis guide rails (401) and one Y-axis guide rail (402), and all of them are driven by servo motors to move the sliders on the three guide rails.

3. The automatic measuring device for geometric parameters of ceramic tiles according to claim 1, characterized in that, The laser displacement sensor system (5) includes: a laser displacement sensor (501), a sensor bracket (502), and a laser sensor adjustment frame (503). The laser displacement sensor (501) is fixed to the slider of the Y-axis of the two-axis gantry module (4) by the sensor bracket (502) and the laser sensor adjustment bracket (503).

4. The automatic measuring device for geometric parameters of ceramic tiles according to claim 1, characterized in that, The machine vision measurement system (6) includes: a CCD camera (601), a lens (602), a camera bracket (603), a light source system (604), and a light source fixing plate (605). The CCD camera (601) is connected to the lens (602) and fixed to the mounting bracket (606) via the camera bracket (603); The light source system (604) is mounted on the mounting bracket (606) via the light source fixing plate (605) and is located around the CCD camera (601).

5. The automatic measuring device for geometric parameters of ceramic tiles according to claim 4, characterized in that, The CCD camera (601), lens (602), and light source system (604) are located directly above the ceramic tile; The light source system (604) has a through hole at its center, and the lens (602) extends into the through hole.

6. The automatic measuring device for geometric parameters of ceramic tiles according to claim 1, characterized in that, The control system (7) includes: a cantilever beam (701), a control box (702), an industrial panel PC (703), and a servo driver (705). The control box (702) is fixed to one side of the housing (1) by a cantilever beam (701); The industrial tablet PC (703) is fixed to the front of the control box (702) by screws, and the industrial tablet PC (703) is connected to the PLC control system (704) and the CCD camera (601) by cables; The servo driver (705) is fixed inside the housing (1), and the servo motor of the two-axis gantry module (4) is connected to the servo driver (705) via a cable.

7. The automatic measuring device for geometric parameters of ceramic tiles according to claim 1, characterized in that, The PLC control system (704) is located inside the housing (1), and the PLC control system (704) is connected to the laser displacement sensor (501), the servo driver (705), and the light source system (604) via cables.

8. The automatic measuring device for geometric parameters of ceramic bricks according to claim 1, characterized in that, The bottom of the box (1) is provided with multiple feet (102).

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