TWI730664B - Laser marking system and controlling method thereof - Google Patents

Abstract

A laser marking system and the controlling method is provided, which includes a display panel, a controller, a first camera, a driver, a second camera and a laser marking device, in which the display panel is provided for setting at least one marking parameter, the controller is provided for receiving the marking parameter, the first camera is provided for receiving a first instruction corresponding to the marking parameter, the first camera is provided for visually recognizing a workpiece to obtain a visual image data of the workpiece, and returning the first visual image data to the controller, the driver is provided for receiving a movement instruction generated by the controller according to the visual image data , so that the driver drives the laser marking system in order to move opposite to the workpiece and returns a command feedback value to the controller, after the controller received the command feedback value to issue a second instruction, so that the second camera is provided for visually aligning the workpiece to obtain a location information of the workpiece, and the second camera is provided for returning the location information of the workpiece to the controller, and the laser marking device is provided for receiving the location information of the workpiece transmitted by the controller, and performing a laser marking process for the workpiece according the location information.

Description

Laser marking system and its control method

The invention relates to the technical field of laser marking, in particular to a laser marking system and control method.

The laser marking machine uses the laser method to form characters, patterns and other marks on the surface of the object. It has the advantages of high accuracy, fast speed, and permanent mark generation. It is required in the industry, especially in the integrated circuit industry. High precision and high volume production of IC tags, so the improvement of laser marking technology and equipment is really important.

Generally speaking, a laser marking machine includes devices such as a laser source, a controller, and a galvanometer module. In actual use, the user must integrate the above-mentioned multiple devices, so it takes a lot of time and cost to complete and assemble the multiple devices. On the other hand, if the laser marking machine needs to install a vision camera for visual alignment, the user must adjust the marking range of the vision camera corresponding to the workpiece to be processed in order to improve the accuracy of laser marking.

In order to improve the shortcomings of the prior art, the main purpose of the present invention is to provide a laser marking system, which integrates a display panel, a controller, multiple cameras and drivers, wherein the display panel allows the user to directly input marking parameters and also The marking result can be directly detected by the display panel.

Another object of the present invention is to provide a laser marking system, which uses a camera to position the workpiece in a wide range, obtain the position coordinates and quantity of the workpiece to be processed in the current working range, and then perform visual alignment of the workpiece to be processed , To meet the functions of large-scale visual marking and assembly line marking.

Another object of the present invention is to provide a laser marking system, the display panel of which can instantly display the state and position of each mechanism axis, laser state display, camera state, and display current field of view and workpiece processing state during processing.

Another object of the present invention is to provide a laser marking system, in which the user can directly issue commands to the axis of the mechanism through the display panel, and issue commands for the laser marking device to scan codes, mark, start processing, pause processing or Control of mechanism axis and laser.

According to the above objective, the present invention provides a laser marking system, which includes a display panel, a controller, a first camera, a driver, a second camera, and a laser marking device, wherein the display panel is used to input and set at least one marking The marking parameters and the controller are used to receive the marking parameters. The first camera receives the first instruction corresponding to the marking parameters sent by the controller, and visually recognizes the workpiece to obtain the first visual image data of the workpiece, and The first visual image data is returned to the controller, and the driver receives the movement command generated by the controller according to the first visual image, drives the laser marking system to move relative to the workpiece, and the driver returns the command during the movement process The value is returned to the controller, and after the controller receives the command feedback value, a second command is issued to the second camera, so that the second camera performs visual alignment of the workpiece according to the second command to obtain the positioning information of the workpiece, and The positioning information of the workpiece is returned to the controller, and the laser marking device receives the positioning information of the workpiece transmitted by the controller, and performs a laser marking process on the workpiece according to the positioning information.

In a preferred embodiment of the present invention, the first camera is arranged on the side of the laser marking device for positioning the workpiece within the working range to obtain the position coordinates of the workpiece within the working range.

In a preferred embodiment of the present invention, the controller further calculates the number of workpieces and/or the position of the workpieces according to the first visual image.

In a preferred embodiment of the present invention, the controller further calculates the shortest processing path according to the number of workpieces and the position of the workpieces.

In a preferred embodiment of the present invention, the controller further calculates the deflection angle of the galvanometer of the laser marking device according to the positioning information of the workpiece.

In a preferred embodiment of the present invention, the second camera and the laser marking device are arranged on the same side.

In a preferred embodiment of the present invention, the second camera further includes capturing and determining the position of the workpiece, and transmitting the position information to the remote control device.

In a preferred embodiment of the present invention, the second camera further includes a step of scanning the barcode on the workpiece.

In a preferred embodiment of the present invention, the marking parameters include at least image information, where the image information may be image size and/or image position.

In a preferred embodiment of the present invention, the driver is coupled to the mechanism shaft to drive the movement of the laser marking system.

According to the above laser marking system, the present invention also provides a laser marking control method, the steps of which include: inputting at least one marking parameter, using a controller to receive the marking parameter, and sending the first camera to the first camera according to the marking parameter. An instruction: use the first camera to visually recognize at least one workpiece according to the first instruction to obtain first visual image data of the workpiece, and return the first visual image data to the controller, and use the controller to perform visual recognition according to the first The visual image generates a movement command, the driver receives the movement command generated by the controller according to the first visual image data, drives the laser marking system to move relative to the workpiece, and the driver returns the command feedback value to The controller uses the second camera to produce the feedback value according to the controller after receiving the command The second command is generated and the workpiece is visually aligned to obtain the positioning information of the workpiece, and the positioning information of the workpiece transmitted by the controller is received by the laser marking device, and the workpiece is laser marked according to the positioning information Process.

In a preferred embodiment of the present invention, the marking parameters include at least image information, where the image information may be image size and/or image position.

In a preferred embodiment of the present invention, the marking parameters are input and set by the user through the display panel.

In a preferred embodiment of the present invention, the laser marking control method further includes a step of positioning the workpiece in the working range to obtain the position coordinates of the workpiece in the working range.

In a preferred embodiment of the present invention, the method for controlling laser marking further includes using the controller to calculate the number of workpieces and/or the position of the workpieces according to the first visual image.

In a preferred embodiment of the present invention, the laser marking control method further includes using the controller to further calculate the deflection angle of the galvanometer of the laser marking device according to the positioning information of the workpiece.

In a preferred embodiment of the present invention, the control method for laser marking further includes when the number of workpieces is multiple and they are randomly placed on the assembly line, using the controller to calculate the shortest processing time according to the position of each workpiece path.

In a preferred embodiment of the present invention, the control method for laser marking further includes using a second camera to capture and determine the position of the workpiece, and transmit the position information to the remote control device.

In a preferred embodiment of the present invention, the control method of laser marking further includes the step of scanning the barcode on the workpiece with the second camera.

In a preferred embodiment of the present invention, the control method of laser marking further includes a driver coupling the mechanism shaft to drive the movement of the laser marking system.

1: Laser marking system

10: Controller

12: Display panel

120: Marking parameters

14: The first camera

16: second camera

18: drive

20: Laser marking device

Step S100-Step S110: Control method steps of laser marking

Step A100-Step A102

B100: steps

FIG. 1 is a block diagram of a laser marking system according to the technology disclosed in the present invention.

FIG. 2 is a schematic flow chart showing the steps of the laser marking control method according to the technology disclosed in the present invention.

Please refer to Figure 1 first. FIG. 1 is a block diagram of a laser marking system according to the technology disclosed in the present invention. In FIG. 1, the laser marking system 1 includes at least: a controller 10, a display panel 12, a first camera 14, a second camera 16, a driver 18, and a laser marking device 20, wherein the display panel 12 is used for The user is allowed to input and set at least one set of marking parameters 120, where the marking parameters 120 may be image information such as image size and/or image position. In addition, the user can also know all the current status of the laser marking system 1 through the display panel 12, such as: the axial position of the laser marking system 1, the status of the laser marking system 1, the first camera 14 and The relationship between the image capturing state of the second camera 16 and the workpiece (not shown in the figure), the processing state and marking condition of the laser source (not shown in the figure), or the marking result. In addition, the user can directly use the display panel 12 to determine whether the current marking parameters 120 need to be adjusted according to the pictures of the marked workpieces. After connecting to the laser marking system 1 through a network device, The marking parameter 120 to be adjusted can be directly adjusted, so that the laser marking device 20 will apply the new marking parameter 120 to perform laser marking when marking next time.

The display panel 12 can be a touch panel on the laser marking system 1, or it can be a desktop computer or laptop, etc., connected to the controller in the laser marking system 1 through a wired or wireless network connection. 10Connect. In another embodiment, the user can obtain at least one set of marking parameters 120 stored in the controller 10 or a remote control device (not shown in the figure) and the marking results corresponding to them through the display panel 12 as reference.

After the controller 10 receives at least one set of marking parameters 120 input by the user through the display panel 12, the controller 10 generates a relative first command according to the set of marking parameters 120 and transmits it to the first camera 14, so that After receiving the first instruction, the first camera 14 starts to visually recognize the workpiece (not shown in the figure) to obtain the first visual image data of the workpiece (not shown in the figure), and then use the first vision The image data is returned to the controller 10. Specifically, the first camera 14 is arranged on the side of the laser marking device 20 in the laser marking system 1, so the first camera 14 can be regarded as a side-axis camera to target the The workpiece (not shown in the figure) is positioned to obtain the position coordinates of the workpiece (not shown in the figure) within this working range, where the working range refers to the area where the workpiece (not shown in the figure) is located , And is the range that the first camera 14 can capture and locate.

After the controller 10 responds to the first visual image data returned by the first camera 14, the controller 10 generates a movement command according to the first visual image. After the driver 18 receives the movement command sent by the controller 10, the driver 18 According to this movement command, the motor (not shown in the figure) can be driven to drive the mechanism shaft (not shown in the figure) to move the laser marking system 1 relative to the workpiece (not shown in the figure), and the driver 18 will The command feedback value generated after the laser marking system 1 is moved is returned to the controller 10 to inform the controller 10 that the laser marking system 1 has finished moving. In an embodiment, the laser marking system 1 can be moved above a workpiece (not shown in the figure) to perform laser marking. In another embodiment, the workpiece (not shown in the figure) can be moved under the laser marking system 1 to complete the laser marking process (for example, when the workpiece is placed on the assembly line). It is worth noting that the laser marking system 1 is connected to the top of the bed (not shown in the figure) via a mechanism shaft, and can move on the top of the bed according to the user's needs.

After the controller 10 receives the command feedback value returned by the driver 18, the controller 10 sends a second instruction to the second camera 16 according to the command feedback value, so that the second camera 16 visually aligns the workpiece to obtain the workpiece (Not shown in the figure) positioning information, and the second camera 16 this workpiece (not shown) The positioning information shown in the figure) is returned to the controller 10. In the embodiment of the present invention, in the laser marking system 1, the second camera 16 is arranged on the same side as the laser marking device 20, so the second camera 16 can be regarded as a coaxial camera. 16 Use visual alignment to obtain the positioning information of the workpiece (not shown in the figure). Therefore, the controller 10 can further calculate the galvanometer (not shown in the figure) of the laser marking device 20 based on the positioning information of the workpiece (not shown in the figure). According to the deflection angle not shown in the figure, the marking accuracy when marking the workpiece (not shown in the figure) can be improved. In another embodiment, the second camera 16 further includes capturing and determining the position of the workpiece (not shown in the figure), and sending information about the position of the workpiece (not shown in the figure) to the remote control device (not shown in the figure). Shown in the figure).

It should be noted that both the first camera 14 and the second camera 16 are smart cameras, and both have a network connection function, which can transmit the captured first visual image data and the positioning information of the workpiece (not shown in the figure) To the display panel 12 of the laser marking system 1 and/or simultaneously to a remote control device (not shown in the figure), such as a terminal or a computer, using an external remote control device (not shown in the figure) To post-process the data. In another embodiment, the first camera 14 and the second camera 16 may not have a network connection function, and the resolution of the two cameras is not limited, and both can be adjusted according to the user's requirements for the accuracy of laser marking. For example, the first camera 14 and the second camera 16 may both be cameras with a lower resolution. In another embodiment, the first camera 14 and the second camera 16 may both have a higher resolution. The resolution of the first camera 14 may be greater than that of the second camera 16 or the resolution of the first camera 14 may be smaller than that of the second camera 16. On the other hand, both the first camera 14 and the second camera 16 may or may not have the network function; or one of the first camera 14 and the second camera 16 may have the network function.

After the controller 10 receives the positioning information of the workpiece transmitted by the second camera 16, the laser marking device 20 will use the positioning information and the marking parameters 120 previously input from the display panel 12, such as image size and/ Or image position, laser marking the workpiece (not shown in the figure) to complete the laser marking process.

In the above-mentioned embodiment, if the workpiece to be marked is placed neatly, the first camera 14 is used to visually recognize the workpiece (not shown in the figure) and the second camera 16 is used to visually recognize the workpiece (not shown in the figure). When the position is located, the controller 10 does not need to calculate the moving distance of the laser marking system 1 relative to the workpiece (not shown in the figure). However, when the workpiece to be marked is placed on the assembly line in a random manner, in order to perform the marking process efficiently, the controller 10 except for the first camera 14 obtained by the first camera (not shown in the figure) In addition to generating a movement command from a visual image data, it also calculates the total number of workpieces (not shown in the figure) and/or the position of each workpiece (not shown in the figure) on the assembly line based on the first visual image data, Finally, the shortest processing path is obtained, so that when the subsequent laser marking device 20 performs marking, in addition to the marking parameters, it is also based on the shortest processing path for the workpiece on the assembly line (not shown in the figure) Mark one by one.

In another embodiment, the driver 18 may have a multi-axis driving function and be connected to the first camera 14 and the second camera 16. In this way, the driver 18 can control the movement of the first camera 14 and the second camera 16 according to user requirements. For example, if the position of the workpiece (not shown in the figure) to be laser-marked exceeds the image capturing range originally set by the first camera 14 and the second camera 16, the user can adjust the first camera 14 Or the image capturing angle of the second camera 16 until the workpiece (not shown in the figure) to be laser marked is within the image capturing range of the first camera 14 or the second camera 16.

In addition, in another embodiment of the present invention, the second camera 16 can further scan the barcode of the workpiece (not shown in the figure) after the workpiece has completed the laser marking process to further confirm the workpiece ( Not shown in the figure) marking results and reading the information of the marked workpiece.

Next, the present invention also discloses a laser marking control method applied to the laser marking system 1, as shown in FIG. 2, and is further described in conjunction with FIG. 1 at the same time. In Figure 2, step S100: input Enter the marking parameters. In this step, the user inputs at least one set of marking parameters 120 of the workpiece (not shown in the figure) to be marked into the laser marking system 1 through the display panel 12 in the laser marking system 1, where The marking parameters can be image information, such as image size and/or image location. Next, step S102: Utilize the controller to receive the marking parameter, and issue a first instruction to the first camera according to the marking parameter. In this step, after the controller 10 receives the marking parameters 120 input by the user through the display panel 12, it sends a first command to the first camera 14 in the laser marking system 1. Then step S104: Use the first camera to visually recognize the workpiece according to the first command to obtain the first visual image data of the workpiece, and return the first visual image data to the controller, and use the controller according to the first visual image data Generate a move command. In this step, after the first camera 14 receives the first instruction from the controller 10, it visually recognizes the workpiece (not shown in the figure) within the working range for large-scale positioning, and obtains the current The position coordinates of the workpiece (not shown in the figure) to be marked in the working range. After the first camera 14 captures the first visual image data of the workpiece (not shown in the figure) within the working range, the first visual image data is returned to the controller 10, and the controller 10 will respond according to this The first visual image data generates a corresponding movement command.

Next, step S106: Use the driver to receive the movement command generated by the controller according to the first visual image data, drive the laser marking system to move relative to the workpiece (not shown in the figure) according to the movement command, and the driver feedback the command The value is passed back to the controller. In this step, after the driver 18 receives the movement command generated by the controller 10 according to the first visual image data, the driver 18 will drive the laser marking system 1 relative to the workpiece according to the movement command (not shown in the figure) And the driver 18 will return the command feedback value generated when the laser marking system 1 moves to the controller 10.

Step S108: Use the second camera to visually align the workpiece according to the second command generated by the controller after receiving the command feedback value, so as to obtain the positioning information of the workpiece. At this step In the controller 10, after receiving the command feedback value returned by the driver 18, it generates a second command, and transmits the second command to the second camera 16, so that the second camera 16 responds to the second command according to the second command. Visual alignment is performed on the workpiece (not shown in the figure) in the current working range to obtain the positioning information of the workpiece (not shown in the figure).

Next, step S110: Use the laser marking device to receive the positioning information of the workpiece transmitted by the controller, and perform a laser marking process on the workpiece according to the positioning information and marking parameters. In the aforementioned step S108, after the second camera 16 obtains the positioning information of the workpiece (not shown in the figure), the positioning information will be returned to the controller 10, and the controller 10 will then use the positioning information and the previously entered marking The parameter 120 drives the laser marking device 20 to mark the workpiece (not shown in the figure) to complete the laser marking process.

It should be noted that in the above steps, if the workpiece (not shown in the figure) is a random material, that is to say, when multiple and arbitrarily placed on the assembly line, in step A100, use The controller 10 calculates the number of workpieces and/or the positions of the workpieces on the assembly line according to the first visual image data. In this step, in addition to generating a movement command based on the first visual image data (step S104), the controller 10 also calculates the number of workpieces and/or the positions of the workpieces on the assembly line based on the first visual image data. Next, in step A102, the controller is used to calculate the deflection angle of the galvanometer and the shortest processing path of the workpiece according to the number of workpieces and/or the position of the workpiece and the algorithm. In this step, the controller 10 uses an algorithm to calculate the deflection angle and the shortest processing path of the galvanometer (not shown in the figure) according to the number of workpieces and/or the position of the workpiece. The purpose of this step is that the workpiece (Not shown in the figure) The assembly line is placed in a random manner. Therefore, in order to save marking time during the laser marking process, it must be based on the number of workpieces (not shown in the figure) and The position is used to calculate the shortest processing path, so that the laser marking device 20 can perform the marking process on the shortest processing path. It should be noted that if the workpieces (not shown in the figure) are not placed in a random manner on the assembly line, the controller 10 may not need to depend on the number of workpieces and/or the work. The position of the workpiece (not shown in the figure) is used to calculate the shortest processing path, and there is no need to calculate the deflection angle of the galvanometer (not shown in the figure). Therefore, the controller 10 can determine whether the workpiece (not shown in the figure) is placed on the assembly line in a random manner according to the first visual image data obtained by the first camera 14. A visual image calculates the number of workpieces and/or the position of the workpiece (not shown in the figure), and further calculates the shortest processing path; if not, the controller 10 does not need to calculate the workpiece (not shown in the figure) The shortest processing path when marking.

In addition, after the marking process is completed, that is, after step S110 is completed, step B100 may be further performed: use the second camera to scan the code of the workpiece that has been marked to determine whether the marking parameters need to be modified. In this step, the second camera 16 is used to scan the code of the workpiece that has been marked. The purpose is to allow the user to process the image of the workpiece that has been marked. It can directly pass through the display panel 12 or the laser marking system 1 It is a remote control device (not shown in the figure) to determine whether the current marking parameter 120 needs to be adjusted. The user can modify it directly through the display panel 12, or connect to the laser marking system 1 The remote control device (not shown in the figure) adjusts the image size and/or image position in the image information of the marking to be modified, so that the new marking can be applied before the next marking parameter.

1: Laser marking system

10: Controller

12: Display panel

120: Marking parameters

14: The first camera

16: second camera

18: drive

20: Laser marking device

Claims (22)

A laser marking system includes: a display panel for inputting and setting at least one marking parameter; a controller for receiving the marking parameter; and a first camera for receiving the signal transmitted by the controller relative to the marking parameter; A first command with a standard parameter performs a visual recognition on at least one workpiece to obtain a first visual image data of the workpiece, and returns the first visual image data to the controller, which according to the first camera The obtained first visual image data determines whether the workpiece is placed on the first-rate waterline in a random manner, and if so, the controller calculates the number of workpieces and/or on the pipeline according to the first visual image data The position of the workpiece, and calculate the shortest processing path of the workpieces. If it is not, the controller does not need to calculate the shortest processing path when marking the workpiece; a driver receives the controller according to the A movement command generated by the first visual image drives the laser marking system to move relative to the workpiece and returns a command feedback value to the controller; a second camera, the controller receives the command feedback value Then a second command is issued to the second camera, so that the second camera performs a visual alignment on the workpiece according to the second command to obtain a positioning information of the workpiece, and returns the positioning information of the workpiece to The controller; and a laser marking device that receives the positioning information of the workpiece transmitted by the controller, and performs a laser marking process on the workpiece according to the positioning information and the set of marking parameters. For the laser marking system described in item 1 of the scope of patent application, the first camera is arranged on one side of the laser marking device for positioning the workpiece in a working range to obtain the A position coordinate of the workpiece within the working range. According to the laser marking system described in claim 1, wherein the controller further calculates a quantity of the workpiece and/or a position of the workpiece according to the first visual image. According to the laser marking system described in item 3 of the scope of patent application, the controller further calculates a shortest processing path according to the number of the workpieces and the position of the workpieces. According to the laser marking system described in item 1 of the scope of patent application, the controller further calculates a deflection angle of a galvanometer of the laser marking device according to the positioning information of the workpiece. The laser marking system as described in item 1 of the scope of patent application, wherein the second camera and the laser marking device are arranged on the same side. Such as the laser marking system described in item 1 or item 6 of the scope of patent application, wherein the second camera further includes capturing and determining the position of the workpiece, and sending a piece of information of the position to a remote control Device. For the laser marking system described in item 1 or item 6 of the scope of patent application, the second camera further includes a step of scanning a barcode on the workpiece. In the laser marking system described in item 1 of the scope of patent application, the marking parameter includes at least one image information. For the laser marking system described in item 9 of the scope of patent application, the image information can be the image size and/or the image position. According to the laser marking system described in item 1 of the scope of patent application, the driver is coupled to a mechanism shaft to drive the movement of the laser marking system. A method for controlling laser marking, the steps of which include: inputting at least one marking parameter; Use a controller to receive the marking parameter, and send a first command to a first camera according to the marking parameter; use the first camera to perform a visual recognition on at least one workpiece according to the first command to obtain the workpiece A first visual image data and the first visual image data are returned to the controller, and the controller is used to determine that the workpiece is arbitrarily placed on the first-rate waterline, and if so, it is calculated on the first visual image data according to the first visual image data. The number of workpieces on the assembly line and/or a position of the workpiece, and calculate the shortest processing path of the workpieces; if not, there is no need to calculate the shortest processing path for the workpiece, and use the controller according to the The first visual image data generates a movement command; a driver receives the movement command generated by the controller according to the first visual image data, drives a laser marking system to move relative to the workpiece according to the movement command, and the The driver returns a command feedback value to the controller; a second camera is used to perform a visual alignment of the workpiece according to a second instruction generated by the controller after receiving the command feedback value to obtain A positioning information of the workpiece; and using a laser marking device to receive the positioning information of the workpiece transmitted by the controller, and perform a laser marking process on the workpiece according to the positioning information. The laser marking control method as described in item 12 of the scope of patent application, wherein the marking parameter includes at least one image information. In the laser marking control method described in item 12 of the scope of patent application, the image information can be the image size and/or the image position. For example, the laser marking control method described in item 12 or 13 of the scope of patent application, wherein the marking parameter is input and set by a user through a display panel. As described in item 12 of the scope of patent application, the laser marking control method further includes performing a positioning step on the workpiece in a working range to obtain a position coordinate of the workpiece in the working range. The laser marking control method as described in item 12 of the scope of the patent application further includes using the controller to calculate a quantity of the workpiece and/or a position of the workpiece according to the first visual image. As described in item 12 of the scope of patent application, the laser marking control method further includes using the controller to further calculate a deflection angle of a galvanometer of the laser marking device according to the positioning information of the workpiece. The laser marking control method as described in item 12 of the scope of patent application, wherein when the number of the workpieces is multiple and they are randomly placed on the water line, the controller is used according to the position of each workpiece Calculate a shortest processing path. The laser marking control method as described in item 12 of the scope of patent application, wherein the second camera is used to capture and determine the position of the workpiece, and transmit a piece of information of the position to a remote control device. As described in item 12 of the scope of patent application, the laser marking control method further includes a step of scanning a barcode on the workpiece by using the second camera. The laser marking control method as described in item 12 of the scope of patent application, wherein the driver is coupled to a mechanism shaft to drive the movement of the laser marking system.

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