Laser positioning method, control device and system for ceramic tile defects

Abstract

The present invention discloses a laser positioning method, control device and system for ceramic tile defects. The method takes an optical image of the ceramic tile, establishes a first rectangular coordinate system with two adjacent sides of the optical image as the X-axis and the Y-axis, identifies the defective part of the ceramic tile, and then constructs a projection relationship between the optical image coordinate system and the laser source projection area coordinate system through the size information and original coordinates of the optical image, and the size information and resolution of the laser source projection area, obtains the first coordinate of the defective part of the ceramic tile, obtains the transmission speed of the ceramic tile on the production line, and obtains the control signal of the laser matrix unit by substituting the first coordinate and the transmission speed into a calculation formula. The control signal is triggered when the ceramic tile reaches a specified position, and the laser matrix unit receives the control signal and projects a laser to mark the defective part of the ceramic tile, so that operators can accurately check the defects on the ceramic tile and improve the working efficiency.

Description

Technical Field

[0001] The invention relates to the field of ceramic tile production, and in particular to a ceramic tile defect laser positioning method, a control device and a system. Background Art

[0002] Many surface defects often occur during the production process of tiles. The existing tile defect and flaw positioning methods on the market all use a defect prompt screen for real-time display. Therefore, when used in scenarios where the assembly line production speed is faster, workers often cannot watch the defect prompt screen and the tiles on the assembly line at the same time. At the same time, in the industrial production line of tiles, the human eye cannot immediately judge the surface defects of the tiles. After working for a long time, eye fatigue leads to low work efficiency and mistakes, resulting in a high missed detection rate, which limits the fastest production speed of the production line. Summary of the invention

[0003] In view of the high missed detection rate of ceramic tiles in industrial production lines, the embodiment of the present invention provides a ceramic tile defect laser positioning method and system. The method comprises the following steps:

[0004] Step S1, obtaining the coordinates of the defective part of the tile, taking an optical image of the tile, setting two adjacent sides of the optical image as the X-axis and the Y-axis, establishing a first rectangular coordinate system through the X-axis and the Y-axis, comparing the optical image with the tile defect database to determine the position of the defective part of the tile, and recording the first coordinates of the defective part of the tile in the first rectangular coordinate system;

[0005] Step S2, constructing a laser projection relationship;

[0006] Step S3, obtaining the transmission speed of the tiles, and measuring the transmission speed of the tiles on the production line using a speed encoder;

[0007] Step S4, data preprocessing, calculating the acquired first coordinates and the transmission speed and obtaining a control signal;

[0008] Step S5, marking and positioning, marking and positioning the defective position of the tile according to the first coordinate and the control signal.

[0009] In one embodiment, the specific steps of constructing the laser projection relationship are as follows:

[0010] Providing a laser matrix unit to project laser light;

[0011] The projection relationship between the optical image coordinate system and the laser matrix unit projection area coordinate system is constructed according to the size information of the optical image, the original coordinates, the size information of the laser matrix unit projection area, and the resolution.

[0012] In one embodiment, the laser matrix unit has N laser sources, and the N laser sources are arrayed along the X-axis direction of the first rectangular coordinate system. A second rectangular coordinate system is established with the projection area of ​​the laser matrix unit. The first rectangular coordinate system is movable relative to the second rectangular coordinate system. The X-axis and Y-axis of the second rectangular coordinate system are respectively parallel to the X-axis and Y-axis of the first rectangular coordinate system. The X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system. According to the number of laser sources, the second rectangular coordinate system is divided into N square grid areas of the same area, and each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system. When the ceramic tile enters the projection area of ​​the laser matrix unit, each square area of ​​the second rectangular coordinate system corresponds to a coordinate interval of the first rectangular coordinate system at a certain moment. As the ceramic tile moves on the production line, the projection area of ​​the laser matrix unit also moves relative to the first rectangular coordinate system. By changing the projection order of each light source in the laser matrix unit according to the coordinate information of the defective part of the ceramic tile, the laser positioning and identification of the ceramic tile defect can be achieved; at the same time, by changing the number of laser sources, the accuracy of positioning the defect can be changed. When the number of laser sources increases, the number of square areas divided by the second rectangular coordinate system increases, and the corresponding defective part of a single square area becomes smaller.

[0013] In one embodiment, the specific steps of marking and locating the defective position of the tile according to the first coordinate and the control signal are as follows:

[0014] According to the first coordinate and the control signal, the projection light source is irradiated to the defective part of the tile, so that the defective part of the tile is highlighted or displayed in a color different from other parts to mark and locate the position of the defective part.

[0015] In one embodiment, the speed encoder is connected to the rotating shaft of the tile production line to measure the transmission speed of the tiles on the production line and convert the transmission speed value into an electrical signal.

[0016] In one embodiment, the specific steps of calculating the acquired first coordinate and the transmission speed are as follows:

[0017] Extract the Y-axis value in the first coordinate system, and obtain the control signal according to the calculation formula T=Y / V, where T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line. By obtaining the delay time, the timing time of the timer in the second controller can be determined. When the defective part of the tile passes through the projection area of ​​the laser matrix unit, the timer just completes the T millisecond delay, and the output port corresponding to the second controller allows the output of the control signal to the laser matrix unit.

[0018] The present invention also provides a control device, comprising: a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction is executed by the processor to implement the above-mentioned laser positioning method for ceramic tile defects.

[0019] The present invention also provides a ceramic tile defect laser positioning system, comprising:

[0020] A defect recognition device, the defect recognition device is used to capture and process optical images of tiles;

[0021] A speed encoder, which is used to measure the transmission speed of the tiles on the production line;

[0022] A first controller, the first controller is electrically connected to the defect recognition device and the speed measuring encoder, and the first controller is used to transmit the first coordinate recorded by the defect recognition device and the transmission speed obtained by the speed measuring encoder;

[0023] a second controller, the second controller being electrically connected to the first controller, and the second controller being used to calculate the first coordinate and the transmission speed to obtain a control signal;

[0024] A laser matrix unit, the laser matrix unit is electrically connected to the second controller, and the laser matrix unit is used to provide a laser source to project laser to mark and locate defective parts of the ceramic tile.

[0025] In one embodiment, the second controller is used to receive and process the signal sent by the first controller, the defect recognition device can establish the first rectangular coordinate system with two adjacent sides of the optical image as the X-axis and the Y-axis respectively, and allocate multiple output ports in the second controller to the X-axis values ​​of the first rectangular coordinate system, and determine the start of the corresponding output port according to the X-axis value in the first coordinate; according to the calculation formula: T=Y / V, the delay time of the timer in the second controller is obtained as the start time for determining the control signal to be allowed to be output through the output port, wherein T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line. When the tile enters the specified position, the timer delays T milliseconds, and the output port outputs the control signal to control the laser matrix unit. By obtaining the delay time, the timing time of the timer in the second controller can be determined. When the defective part of the tile passes through the projection area of ​​the laser matrix unit, the timer just completes the T millisecond delay, and the corresponding output port of the second controller allows the output of the control signal to the laser matrix unit.

[0026] In one embodiment, the number of laser sources in the laser matrix unit is N, and the N laser sources work independently. The N laser sources are arrayed along the X-axis direction of the first rectangular coordinate, and a second rectangular coordinate system is established with the projection area of ​​the laser matrix unit. The first rectangular coordinate system is movable relative to the second rectangular coordinate system. The X-axis and Y-axis of the second rectangular coordinate system are parallel to the X-axis and Y-axis of the first rectangular coordinate system respectively. The X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system. According to the number of laser sources, the second rectangular coordinate system is divided into N square grid areas of the same area. Each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system. When the tile enters the projection area of ​​the laser matrix unit, domain, each square area of ​​the second rectangular coordinate system corresponds to a coordinate interval of the first rectangular coordinate system at each moment. As the tiles move on the production line, the projection area of ​​the laser matrix unit is also moving relative to the first rectangular coordinate system. By utilizing the coordinate information of the defective part of the tile and changing the projection order of each light source in the laser matrix unit, the laser positioning and identification of the tile defects can be achieved; at the same time, by changing the number of laser sources, the accuracy of locating defects can be changed. When the number of laser sources increases, the number of square areas divided by the second rectangular coordinate system increases, and the defective part corresponding to a single square area becomes smaller.

[0027] In one embodiment, the defect identification device is connected to the first controller via a CAN bus.

[0028] In one embodiment, the first controller and the second controller are connected via RS485.

[0029] In one embodiment, the laser matrix unit uses a low-illumination laser. By using a low-illumination laser, excessive laser light is prevented from irritating the eyes of the inspector, thereby achieving laser point positioning and reducing damage to the human eye.

[0030] Beneficial effects of the present invention:

[0031] The present invention provides a method for laser positioning of ceramic tile defects. By shooting the optical image of the ceramic tile, a first rectangular coordinate system is established with two adjacent sides of the optical image as the X-axis and the Y-axis. The optical image of the ceramic tile is compared with the ceramic tile defect database to obtain the first coordinate of the ceramic tile defect part in the first rectangular coordinate. Then, a mapping relationship is established between the laser matrix unit projection area coordinate system and the first rectangular coordinate system. The transmission speed of the ceramic tile on the production line is obtained by a speed encoder. The control signal is obtained by substituting the first coordinate and the transmission speed of the ceramic tile into the calculation formula. The laser matrix unit receives the control signal and projects the laser to mark the defective part of the ceramic tile, which is convenient for operators to accurately check the defects on the ceramic tile in the ceramic tile industrial production line, improve the inspection efficiency, and speed up the production line. The present invention provides a control device, which is provided with a program or instruction that can realize the above ceramic tile defect laser positioning method. The present invention provides a ceramic tile defect laser positioning system, which can identify the defects of the ceramic tile through the defect recognition device and establish a coordinate system to obtain the coordinates of the defective part, and then project the laser to the defective part of the ceramic tile through the laser matrix unit to receive the control signal, which is convenient for operators to accurately check the defects on the ceramic tile in the ceramic tile industrial production line, improve the inspection efficiency, and speed up the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a specific implementation flow chart of the laser positioning method for ceramic tile defects;

[0033] Figure 2 This is the flow chart of the laser positioning system for ceramic tile defects;

[0034] Figure 3 This is the connection diagram of the tile defect laser positioning system. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] Example 1

[0038] The first embodiment of the present application discloses a laser positioning method for ceramic tile defects, such as Figure 3 As shown, a laser positioning method for ceramic tile defects comprises the following steps:

[0039] Step S1, obtaining the coordinates of the defective part of the tile, taking an optical image of the tile, establishing a first rectangular coordinate system with two adjacent sides of the optical image as the X-axis and the Y-axis, comparing the optical image of the tile with the tile defect database to determine the position of the defective part of the tile, and recording the first coordinate of the defective part of the tile in the first rectangular coordinate system;

[0040] Step S2, constructing a laser projection relationship;

[0041] Step S3, obtaining the transmission speed of the tiles, and measuring the transmission speed of the tiles on the production line using a speed encoder;

[0042] Step S4, data preprocessing, calculating the acquired first coordinate and transmission speed and obtaining a control signal;

[0043] Step S5: laser positioning, marking and locating the defective position of the tile according to the first coordinate and the control signal.

[0044] In addition to the features of the above embodiment, this embodiment further defines: the specific steps of establishing the laser projection relationship are as follows:

[0045] Providing a laser matrix unit to project laser light;

[0046] The projection relationship between the optical image coordinate system and the laser matrix unit projection area coordinate system is constructed according to the size information of the optical image, the original coordinates, the size information of the laser matrix unit projection area, and the resolution.

[0047] like Figure 3As shown, in addition to the features of the above embodiments, the present embodiment further defines: the laser matrix unit has N laser sources, the N laser sources are arrayed along the X-axis direction of the first rectangular coordinate system, a second rectangular coordinate system is established with the projection area of ​​the laser matrix unit, the first rectangular coordinate system is movable relative to the second rectangular coordinate system, the X-axis and Y-axis of the second rectangular coordinate system are respectively parallel to the X-axis and Y-axis of the first rectangular coordinate system, the X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system, and the second rectangular coordinate system is divided into N square grid areas of the same area according to the number of laser sources, and each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system. When the ceramic tile enters the projection area of ​​the laser matrix unit, each square area of ​​the second rectangular coordinate system corresponds to a coordinate interval of the first rectangular coordinate system at a certain moment. As the ceramic tile moves on the production line, the projection area of ​​the laser matrix unit also moves relative to the first rectangular coordinate system. By utilizing the coordinate information of the defective part of the ceramic tile and changing the projection order of each light source in the laser matrix unit, the laser positioning and identification of the ceramic tile defect can be achieved. At the same time, by changing the number of laser sources, the accuracy of positioning the defect can be changed. When the number of laser sources increases, the number of square areas divided by the second rectangular coordinate system increases, and the corresponding defective part of a single square area becomes smaller.

[0048] In addition to the features of the above-mentioned embodiment, this embodiment further defines: in step S3, the speed encoder is connected to the rotating shaft of the tile production line to measure the transmission speed of the tiles on the production line and convert the transmission speed value into an electrical signal.

[0049] like Figure 3 As shown, in addition to the features of the above embodiment, this embodiment further defines: the specific steps of obtaining the first coordinate and the transmission speed for calculation are as follows:

[0050] Extract the Y-axis value in the first coordinate, and obtain the control signal for controlling the laser source according to the calculation formula T=Y / V, where T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line. By obtaining the delay time, the timing time of the timer in the second controller can be determined. When the defective part of the tile passes through the projection area of ​​the laser matrix unit, the timer just completes the T millisecond delay, and the corresponding output port of the second controller allows the output of the control signal to the laser matrix unit.

[0051] like Figure 3 As shown, in addition to the features of the above-mentioned embodiments, this embodiment is further defined as follows: the laser matrix unit receives the control signal in step S4, activates the corresponding laser source to project onto the defective portion of the tile, and highlights the defective portion of the tile or displays a color different from other positions to identify and locate the position of the defective portion.

[0052] In summary, the laser positioning method for ceramic tile defects provided by the present invention establishes a first rectangular coordinate system with two adjacent sides of the optical image as the X-axis and the Y-axis by shooting the optical image of the ceramic tile, compares the optical image of the ceramic tile with the ceramic tile defect database, obtains the first coordinate of the defective part of the ceramic tile in the first rectangular coordinate, and then constructs a mapping relationship between the laser matrix unit projection area coordinate system and the first rectangular coordinate system, obtains the transmission speed of the ceramic tile on the production line through the speed encoder, substitutes the first coordinate and the transmission speed of the ceramic tile into the calculation formula to obtain the control signal, and the laser matrix unit receives the control signal and projects the laser to mark the defective part of the ceramic tile, so that the operator can accurately check the defects on the ceramic tile in the ceramic tile industrial production line, improve the inspection efficiency, and speed up the production speed of the industrial production line.

[0053] Example 2

[0054] A second embodiment of the present invention provides a ceramic tile defect laser positioning control device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction is executed by the processor to implement the above ceramic tile defect laser positioning method.

[0055] Example 3

[0056] The third embodiment of the present invention provides a laser positioning system for ceramic tile defects, comprising: a defect recognition device, a first controller, a second controller and a laser matrix unit, wherein the defect recognition device is used to capture and process optical images of ceramic tiles; the first controller is used to transmit the first coordinates recorded by the defect recognition device and obtain the transmission speed of the ceramic tiles on the production line, and the first controller is electrically connected to the defect recognition device and the speed encoder; the second controller is used to calculate the first coordinates and the transmission speed to obtain a control signal of the laser matrix unit, and the second controller is electrically connected to the first controller; the laser matrix unit is electrically connected to the second controller, and the laser matrix unit is used to provide a laser source to project laser to mark and locate defective parts of the ceramic tiles.

[0057] In addition to the features of the above-mentioned embodiment, the present embodiment further defines that the second controller is used to receive and process the signal sent by the first controller, the defect recognition device uses two adjacent sides of the optical image as the X-axis and the Y-axis to establish the first rectangular coordinate system, the multiple output ports in the second controller are allocated correspondingly to the X-axis values ​​of the first rectangular coordinate system, the corresponding output port is started according to the X-axis value in the first coordinate, and the delay time of the timer in the second controller is obtained according to the calculation formula: T=Y / V, as the start time for determining the control signal to be allowed to be output through the output port, wherein T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line. By obtaining the delay time, the timing time of the timer in the second controller can be determined, and when the defective part of the tile passes through the projection area of ​​the laser matrix unit, the timer just completes the T millisecond delay, and the corresponding output port of the second controller allows the control signal to be output to the laser matrix unit.

[0058] In addition to the features of the above-mentioned embodiment, the present embodiment further defines that the number of laser sources in the laser matrix unit is N, and the N laser sources work independently. The N laser sources are arrayed along the X-axis direction of the first rectangular coordinate, and a second rectangular coordinate system is established with the projection area of ​​the laser matrix unit. The first rectangular coordinate system is movable relative to the second rectangular coordinate system, and the X-axis and Y-axis of the second rectangular coordinate system are respectively parallel to the X-axis and Y-axis of the first rectangular coordinate system. The X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system. According to the number of laser sources, the second rectangular coordinate system is divided into N square grid areas of the same area, and each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system. When the ceramic tile enters the projection area of ​​the laser matrix unit, each square area of ​​the second rectangular coordinate system corresponds to a coordinate interval of the first rectangular coordinate system at a certain moment. As the ceramic tile moves on the production line, the projection area of ​​the laser matrix unit also moves relative to the first rectangular coordinate system. By utilizing the coordinate information of the defective part of the ceramic tile and changing the projection order of each light source in the laser matrix unit, the laser positioning and identification of the ceramic tile defect can be achieved. At the same time, by changing the number of laser sources, the accuracy of positioning the defect can be changed. When the number of laser sources increases, the number of square areas divided by the second rectangular coordinate system increases, and the corresponding defective part of a single square area becomes smaller.

[0059] In addition to the features of the above embodiments, this embodiment further defines that the defect identification device is connected to the first controller via a CAN bus.

[0060] In addition to the features of the above embodiments, this embodiment further defines that the first controller and the second controller are connected via RS485.

[0061] In addition to the features of the above embodiments, this embodiment further defines that the laser matrix unit uses a low-illumination laser. By using a low-illumination laser, excessive laser light is prevented from irritating the eyes of the inspector, thereby achieving laser point positioning and reducing damage to the human eye.

[0062] In summary, the ceramic tile defect laser positioning system provided by the present invention can identify the defects of the ceramic tile through the defect recognition equipment and establish a coordinate system to obtain the coordinates of the defective part, and then project the laser to the defective part of the ceramic tile by receiving the control signal through the laser matrix unit, so as to facilitate the operators to accurately check the defects on the ceramic tile in the ceramic tile industrial production line, improve the inspection efficiency, and speed up the production line production speed.

[0063] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of this application shall be subject to the attached claims.

Claims

1. A laser positioning method for ceramic tile defects, characterized in that: The steps include: Step S1, obtaining the coordinates of the defective part of the tile, taking an optical image of the tile, setting two adjacent sides of the optical image as the X-axis and the Y-axis, establishing a first rectangular coordinate system through the X-axis and the Y-axis, comparing the optical image with the tile defect database to determine the position of the defective part of the tile, and recording the first coordinates of the defective part of the tile in the first rectangular coordinate system; Step S2, constructing a laser projection relationship; The specific steps include: providing a laser matrix unit to project laser; constructing a projection relationship between the optical image coordinate system and the laser matrix unit projection area coordinate system according to the size information, original coordinates, size information and resolution of the optical image projection area; wherein the laser matrix unit has N laser sources, the N laser sources are arrayed along the X-axis direction of the first rectangular coordinate system, a second rectangular coordinate system is established with the laser matrix unit projection area, the first rectangular coordinate system is movable relative to the second rectangular coordinate system, the X-axis and Y-axis of the second rectangular coordinate system are respectively parallel to the X-axis and Y-axis of the first rectangular coordinate system, the X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system, and the second rectangular coordinate system is divided into N square grid areas of the same area according to the number of laser sources, and each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system; Step S3, obtaining the transmission speed of the tiles, and measuring the transmission speed of the tiles on the production line using a speed encoder; Step S4, data preprocessing, calculating the first coordinate and the transmission speed and obtaining a control signal; the specific steps include: extracting the Y-axis value in the first coordinate, and obtaining the control signal according to the calculation formula T=Y / V, wherein T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line; Step S5, marking and positioning, marking and positioning the defective position of the tile according to the first coordinate and the control signal.

2. The method for laser positioning of ceramic tile defects according to claim 1, characterized in that: The specific steps of marking and locating the defective position of the tile according to the first coordinate and the control signal are as follows: According to the first coordinate and the control signal, the projection light source is irradiated to the defective part of the tile, so that the defective part of the tile is highlighted or displayed in a color different from other parts to mark and locate the position of the defective part.

3. The method for laser positioning of ceramic tile defects according to claim 1, characterized in that: The speed encoder is connected to the rotating shaft of the tile production line. The speed encoder measures the transmission speed of the tiles on the production line and converts the value of the transmission speed into an electrical signal.

4. A control device, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction is executed by the processor to implement the laser positioning method for ceramic tile defects as described in any one of claims 1 to 3.

5. A laser positioning system for ceramic tile defects, characterized in that: include: A defect recognition device, the defect recognition device is used to capture and process optical images of tiles; A speed encoder, which is used to measure the transmission speed of the tiles on the production line; A first controller, the first controller is electrically connected to the defect recognition device and the speed encoder, and the first controller is used to transmit the first coordinate recorded by the defect recognition device and the transmission speed of the tile on the production line; a second controller, the second controller is electrically connected to the first controller, and the second controller is used to calculate the first coordinate and the transmission speed to obtain a control signal; wherein the second controller receives and processes the signal sent by the first controller, the defect recognition device can use the two adjacent sides of the optical image as the X-axis and the Y-axis to establish a first rectangular coordinate system, allocate multiple output ports in the second controller to the X-axis values ​​of the first rectangular coordinate system, and determine to start the corresponding output port according to the X-axis value in the first coordinate; according to the calculation formula: T=Y / V, obtain the delay time of the timer in the second controller as the start time for determining the control signal to be allowed to be output through the output port, wherein T is the delay time, Y is the Y-axis value of the defective part in the first rectangular coordinate system, and V is the transmission speed of the tile on the production line; A laser matrix unit, wherein the laser matrix unit is electrically connected to the second controller, and the laser matrix unit is used to provide a laser source to project lasers to project and mark defective parts of ceramic tiles; wherein the number of laser sources in the laser matrix unit is N, and the N laser sources work independently; the N laser sources are arrayed along the X-axis direction of the first rectangular coordinate system, and a second rectangular coordinate system is established with the projection area of ​​the laser matrix unit; the first rectangular coordinate system is movable relative to the second rectangular coordinate system, and the X-axis and Y-axis of the second rectangular coordinate system are respectively parallel to the X-axis and Y-axis of the first rectangular coordinate system; the X-axis interval of the second rectangular coordinate system is the same as the X-axis interval of the first rectangular coordinate system; and the second rectangular coordinate system is divided into N square grid areas of the same area according to the number of laser sources, and each square grid area dynamically corresponds to the coordinate interval of the first rectangular coordinate system.

6. The ceramic tile defect laser positioning system according to claim 5, characterized in that: The defect identification device is connected to the first controller via a CAN bus; and / or The first controller and the second controller are connected via RS485; and / or The laser matrix unit adopts a low-illumination laser.

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