Laser heating method and related device

Abstract

The embodiment of the invention discloses a laser heating method and a related device, which are used for improving the heat uniformity of an object to be heated. The controller is applied to the heating system, the heating system further comprises a bearing platform and a plurality of laser units, a to-be-heated object is placed on the bearing platform, and the method comprises the following steps: determining and starting a plurality of target laser units from the plurality of laser units, and determining a target partition according to an obtained thermal image containing the to-be-heated object, the target laser units are in one-to-one correspondence with the target partitions; for each target laser unit, acquiring pixel temperature values of a plurality of pixels involved in a target partition corresponding to the target laser unit, and determining a target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; and obtaining a corresponding target power difference value according to a difference value between the target partition temperature value and a preset temperature value, and adjusting the power of the target laser unit based on the target power difference value so as to stabilize the target partition temperature value at the preset temperature value.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of welding, and in particular to a laser heating method and related devices. Background Art

[0002] Laser welding is a key application of materials processing technology. It uses a laser beam as an energy source to generate heat from the heat generated by the laser beam striking the heated object. Lasers have optical properties such as refraction and focusing, making them suitable for heated objects such as PCBs, LED panels, and mini-LED panels. Laser welding offers advantages such as low heat input, minimal welding deformation, and immunity to significant electromagnetic fields, bringing convenience to people.

[0003] However, in existing laser welding solutions, when the laser emitting surface of the laser welding equipment is aimed at the heated object for heating and welding, due to the aging of the laser welding equipment and the different materials of the heated object, the thermal uniformity of the heated object is poor, and the temperature values of the heated object at different locations cannot be the same within a certain range, which brings certain inconveniences to the welding work. Summary of the Invention

[0004] The embodiments of the present application provide a laser heating method and related apparatus for improving the thermal uniformity of an object to be heated.

[0005] In a first aspect, an embodiment of the present application provides a laser heating method, which is applied to a controller of a heating system, wherein the heating system further includes a carrying platform and a plurality of laser units, and an object to be heated is placed on the carrying platform. The method includes:

[0006] Determining and activating a plurality of target laser units from the plurality of laser units, and determining a target partition based on the acquired thermal image containing the object to be heated, wherein the target laser unit is a laser unit whose emitted laser light can irradiate the object to be heated, and the target partition is an area on the thermal image corresponding to an irradiation range of the laser light emitted by the target laser unit on the carrying platform, and the target laser units correspond to the target partitions in a one-to-one manner;

[0007] For each of the target laser units, pixel temperature values of a plurality of pixels involved in the target partition corresponding to the target laser unit are obtained, and a target partition temperature value of the target partition is determined based on the pixel temperature values of the plurality of pixels; a corresponding target power difference is obtained based on a difference between the target partition temperature value and a preset temperature value, and the power of the target laser unit is adjusted based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

[0008] Optionally, determining and turning on a plurality of target laser units from the plurality of laser units, and determining a target partition according to the acquired thermal image including the object to be heated, includes:

[0009] Controlling the target laser units to be in an on state according to the turn-on instructions for the target laser units in the plurality of laser units input by the user;

[0010] Obtaining at least one set of pixel point coordinate groups preset for the target laser units, where each set of pixel point coordinate groups includes a plurality of pixel point coordinates, and the set of pixel point coordinate groups corresponds to the target laser units one by one;

[0011] For each set of pixel point coordinate groups, determining the position range of the pixels corresponding to the pixel point coordinates involved in the set of pixel point coordinate groups on the acquired thermal image including the object to be heated as the target partition of the target laser unit corresponding to the set of pixel point coordinate groups.

[0012] Optionally, determining and turning on a plurality of target laser units from the plurality of laser units, and determining a target partition according to the acquired thermal image including the object to be heated, includes:

[0013] Obtaining the thermal image including the object to be heated and a plurality of irradiation range dividing lines, where the irradiation range dividing lines are lines on the bearing platform for dividing the irradiation ranges of the lasers emitted by different laser units on the bearing platform;

[0014] Dividing the thermal image according to the plurality of irradiation range dividing lines to obtain a plurality of partitions, where the partitions are regions on the thermal image corresponding to the irradiation ranges of the lasers emitted by the laser units on the bearing platform;

[0015] Determining the partitions covered by the region of the object to be heated on the thermal image as the target partitions, and calculating the center point coordinates of the target partitions according to the coordinates of the pixels involved in the target partitions;

[0016] Based on the preset relationship between the center point coordinates of the partitions and the laser units, determining the laser units corresponding to the center point coordinates of the target partitions as the target laser units, and controlling the target laser units to be in an on state.

[0017] Optionally, determining the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels includes:

[0018] For each target partition, determining the maximum value of the pixel temperature values of the plurality of pixels involved in the target partition as the target partition temperature value of the target partition.

[0019] Optionally, determining the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels includes:

[0020] For each of the target partitions, determining the average value of the pixel temperature values of the plurality of pixels involved in the target partition as the target partition temperature value of the target partition.

[0021] Optionally, obtaining the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value includes:

[0022] Based on the relationship between the preset temperature difference and the power difference, obtaining the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value;

[0023] Or,

[0024] Based on the proportional integral derivative control algorithm and the difference between the target partition temperature value and the preset temperature value, obtaining the corresponding target power difference.

[0025] Optionally, determining and turning on a plurality of target laser units from the plurality of laser units includes:

[0026] Determining and turning on a plurality of target laser units from the plurality of laser units, and maintaining the laser units other than the target laser units among the plurality of laser units in the off state.

[0027] A second aspect of the embodiments of the present application provides a laser heating device, including:

[0028] A determination unit, configured to determine and turn on a plurality of target laser units from the plurality of laser units, and determine a target partition according to a thermal image including the object to be heated, where the target laser unit is a laser unit whose emitted laser can irradiate the object to be heated, the target partition is an area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the carrying platform, and the target laser unit corresponds to the target partition one by one;

[0029] An adjustment unit, configured to, for each of the target laser units, obtain the pixel temperature values of a plurality of pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

[0030] In a third aspect of the embodiments of the present application, a laser heating device is provided, including:

[0031] a central processing unit, a memory, and an input / output interface;

[0032] the memory is a transient storage memory or a persistent storage memory;

[0033] the central processing unit is configured to communicate with the memory and execute the instruction operations in the memory to perform the foregoing method.

[0034] In a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, including instructions that, when run on a computer, cause the computer to execute the foregoing method.

[0035] From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0036] First, determine and turn on multiple target laser units from multiple laser units, and determine the target partition according to the obtained thermal image including the object to be heated. Then, for each target laser unit, obtain the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit. Then, determine the target partition temperature value of the target partition according to the pixel temperature values of multiple pixels. Finally, obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value. The irradiation ranges of the lasers emitted by each target laser unit are different, and the corresponding target partitions are also different. The temperature of the irradiation range is the partition temperature value of the target partition. Therefore, based on the real-time target partition temperature value and the preset temperature value (the target value of thermal uniformity), the power of the corresponding target laser unit can be adjusted. If the target partition temperature value is lower than the preset temperature value, the power is increased; if the target partition temperature value is higher than the preset temperature value, the power is decreased, so that the temperature value corresponding to each irradiation range approaches the preset temperature value and finally equals the preset temperature value, with high thermal uniformity and convenience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of an embodiment of a laser heating method disclosed in the present application;

[0038] Figure 2 It is a schematic diagram of another embodiment of a laser heating method disclosed in the present application;

[0039] Figure 3 It is a schematic diagram of an embodiment of a laser heating device disclosed in the present application;

[0040] Figure 4 It is a schematic diagram of another embodiment of a laser heating device disclosed in the present application. Detailed implementation manners

[0041] The present application will be further described in detail below with reference to the accompanying drawings.

[0042] An embodiment of the present application provides a laser heating method and a related device for improving the thermal uniformity of an object to be heated.

[0043] In the field of welding, laser welding is an important application. In the existing solutions, a laser beam is used to align the object to be heated to generate heat for welding. However, due to reasons such as the aging of laser welding equipment and the different materials of various parts of the object to be heated, the thermal uniformity of the object to be heated is poor, and the temperature values of various parts of the object to be heated cannot be the same within a certain range. To solve the above problems, the present application provides a laser heating method and a laser heating device, which can adjust the power of the corresponding target laser unit based on the real-time target partition temperature value and the preset temperature value. If the target partition temperature value is lower than the preset temperature value, the power is increased; if the target partition temperature value is higher than the preset temperature value, the power is decreased, so that the temperature value corresponding to each irradiation range approaches the preset temperature value and finally equals the preset temperature value, with high thermal uniformity, which brings convenience to users.

[0044] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order different from that shown or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] The following describes a laser heating method of the present application. Please refer to Figure 1, An embodiment of a laser heating method of the present application is applied to a controller of a heating system. The heating system further includes a carrying platform and a plurality of laser units. The object to be heated is placed on the carrying platform. The method includes:

[0047] 101. Determine and turn on a plurality of target laser units from the plurality of laser units, and determine a target area according to the obtained thermal image including the object to be heated;

[0048] Determine and turn on a plurality of target laser units from the plurality of laser units, and determine a target area according to the obtained thermal image including the object to be heated. Among them, the target laser unit is a laser unit whose emitted laser can irradiate the object to be heated, and the target area is the area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the carrying platform. The target laser unit and the target area are in one-to-one correspondence. Specifically, after the object to be heated is in place and placed on the carrying platform, it is necessary to determine the target laser unit and the target area. The target laser unit can be selected in advance by the user input, or determined by the target area, etc., which can be set according to actual needs, and will not be specifically limited here. After the target laser unit is determined, turn on the target laser unit, and the target laser unit works to emit laser. The target area can be determined by the thermal image and the target laser unit, or determined solely by the thermal image, which can be selected according to actual needs and will not be specifically limited here.

[0049] 102. For each target laser unit, obtain the pixel temperature values of a plurality of pixels involved in the target area corresponding to the target laser unit, and determine the target area temperature value of the target area according to the pixel temperature values of the plurality of pixels; obtain the corresponding target power difference according to the difference between the target area temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target area temperature value at the preset temperature value.

[0050] For each target laser unit, obtain the pixel temperature values of a plurality of pixels involved in the target area corresponding to the target laser unit, and determine the target area temperature value of the target area according to the pixel temperature values of the plurality of pixels; obtain the corresponding target power difference according to the difference between the target area temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target area temperature value at the preset temperature value. Specifically, the controller respectively obtains the target area temperature values of each target area, respectively calculates and adjusts the power of each target laser unit, and then respectively adjusts the temperature of the irradiation range of the laser emitted by each target laser unit. There is position information and temperature information on the thermal image, that is, the coordinates of the pixels and the temperature values of the pixels. The target area temperature value can be calculated based on the information of the pixels, and then the power required by the target laser unit can be calculated based on the preset relationship or relevant algorithms. Finally, the temperature of each irradiation range is adjusted so that the temperature of all irradiation ranges is stabilized at the preset temperature value.

[0051] In the embodiment of the present application, first, multiple target laser units are determined and turned on from multiple laser units, and a target partition is determined according to the acquired thermal image including the object to be heated. Then, for each target laser unit, the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit are obtained. Next, the target partition temperature value of the target partition is determined according to the pixel temperature values of the multiple pixels. Finally, the corresponding target power difference is obtained according to the difference between the target partition temperature value and the preset temperature value, and the power of the target laser unit is adjusted based on the target power difference to stabilize the target partition temperature value at the preset temperature value. The irradiation ranges of the lasers emitted by each target laser unit are different, and the corresponding target partitions are also different. The temperature of the irradiation range is the partition temperature value of the target partition. Therefore, based on the real-time target partition temperature value and the preset temperature value (the target value of thermal uniformity), the power of the corresponding target laser unit can be adjusted. If the target partition temperature value is lower than the preset temperature value, the power is increased; if the target partition temperature value is higher than the preset temperature value, the power is decreased, so that the temperature value corresponding to each irradiation range approaches the preset temperature value and finally equals the preset temperature value, with high thermal uniformity and convenience for users.

[0052] Please refer to Figure 2 , another embodiment of a laser heating method of the present application is applied to a controller of a heating system. The heating system further includes a carrying platform and multiple laser units, and the object to be heated is placed on the carrying platform. The method includes:

[0053] 201. Determine and turn on multiple target laser units from multiple laser units, keep the laser units other than the target laser units among the multiple laser units in the off state, and determine a target partition according to the acquired thermal image including the object to be heated;

[0054] Determine and turn on multiple target laser units from multiple laser units, keep the laser units other than the target laser units among the multiple laser units in the off state, and determine a target partition according to the acquired thermal image including the object to be heated. Among them, the target laser unit is a laser unit whose emitted laser can irradiate the object to be heated, and the target partition is the area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the carrying platform. The target laser unit and the target partition are in one-to-one correspondence. After the object to be heated is in place and placed on the carrying platform, it is necessary to determine the target laser unit and the target partition. After determination, the target laser unit needs to be turned on to emit laser. Specifically, there are at least two implementation manners, which are not specifically limited here.

[0055] In one embodiment, the user first inputs an activation instruction in advance to select a target laser unit, and then the controller cooperates with the acquired thermal image to determine the corresponding target area. Specifically, first, according to the activation instruction input by the user for the target laser unit among multiple laser units, the target laser unit is controlled to be in an activated state; then at least one set of pixel point coordinate groups for the target laser unit is acquired, where each pixel point coordinate group includes multiple pixel point coordinates, and each pixel point coordinate group corresponds to a target laser unit one by one; finally, for each set of pixel point coordinate groups, the position range of the pixels corresponding to the pixel point coordinates involved in the pixel point coordinate group on the acquired thermal image containing the object to be heated is determined as the target area corresponding to the pixel point coordinate group. Briefly speaking, that is, the user pre-selects the target laser unit, activates the target laser unit and keeps other laser units off to save energy. The user also pre-sets the pixel point coordinate groups, that is, the areas on the image are pre-divided based on the pixel point coordinate groups, and the relationship between the pixel coordinates and the target laser unit is pre-set, so that the corresponding target area can be found by the target laser unit.

[0056] In another embodiment, the user pre-sets multiple irradiation range dividing lines on the bearing platform. Thus, in the thermal image, there are the object to be heated and multiple irradiation range dividing lines. Based on the thermal image, each area can be first divided, then the target area can be determined, and finally the corresponding target laser unit can be determined based on the target area. Specifically, first, a thermal image containing the object to be heated and multiple irradiation range dividing lines is acquired. The irradiation range dividing lines are the lines on the bearing platform used to divide the irradiation ranges of the lasers emitted by different laser units on the bearing platform. Then, the thermal image is divided according to the multiple irradiation range dividing lines to obtain multiple areas. The area is the area on the thermal image corresponding to the irradiation range of the laser emitted by the laser unit on the bearing platform. Next, the area covered by the area involved by the object to be heated on the thermal image is determined as the target area, and the center point coordinates of the target area are calculated according to the coordinates of the pixels involved in the target area. Finally, based on the pre-set relationship between the center point coordinates of the area and the laser unit, the laser unit corresponding to the center point coordinates of the target area is determined as the target laser unit, and the target laser unit is controlled to be in an activated state. The target area is the area on the thermal image covered by the object to be heated. Then, the center point coordinates of the area can be determined based on the dividing lines, or the boundary point coordinates can be determined, that is, the corresponding target laser unit is determined by using the target area and the pre-set relationship between the center point coordinates of the area and the laser unit.

[0057] 202. For each target laser unit, obtain the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

[0058] For each target laser unit, obtain the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value. Specifically, the controller respectively obtains the target partition temperature values of each target partition, respectively calculates and adjusts the power of each target laser unit, and then respectively adjusts the temperature of the irradiation range of the laser emitted by each target laser unit. There is position information and temperature information on the thermal image, that is, the coordinates of the pixels and the pixel temperature values. The target partition temperature value can be calculated based on the pixel information, and then the power required by the target laser unit can be calculated based on the preset relationship or related algorithm. Finally, the temperature of each irradiation range is adjusted so that the temperatures of all irradiation ranges are stabilized at the preset temperature value.

[0059] Among them, there are at least two implementation manners for determining the target partition temperature value. In one implementation manner, for each target partition, determine the maximum value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition. In another implementation manner, for each target partition, determine the average value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition. Simply put, that is, take the maximum pixel temperature value or the average pixel temperature value within a certain target partition as the temperature value of the target partition.

[0060] Among them, there are at least two implementation manners for determining the target power difference. In one implementation manner, based on the relationship between the preset temperature difference and the power difference, obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value. Or, in another implementation manner, based on the proportional integral derivative control algorithm and the difference between the target partition temperature value and the preset temperature value, obtain the corresponding target power difference. Simply put, that is, preset the relationship between the temperature difference and the power difference and directly query according to this relationship, or use the PID control algorithm, preset the proportional coefficient, integral coefficient and derivative coefficient, and substitute them into the calculation to obtain the target power difference.

[0061] In this embodiment, multiple target laser units are first determined and turned on from multiple laser units, and target partitions are determined according to the obtained thermal image including the object to be heated. Other laser units are kept in the off state. Then, for each target laser unit, the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit are obtained, and then the target partition temperature value of the target partition is determined according to the pixel temperature values of the multiple pixels. Finally, the corresponding target power difference is obtained according to the difference between the target partition temperature value and the preset temperature value, and the power of the target laser unit is adjusted based on the target power difference to stabilize the target partition temperature value at the preset temperature value. The irradiation ranges of the lasers emitted by each target laser unit are different, and the corresponding target partitions are also different. The temperature of the irradiation range is the partition temperature value of the target partition. Therefore, based on the real-time target partition temperature value and the preset temperature value, the power of the corresponding target laser unit can be adjusted. If the target partition temperature value is lower than the preset temperature value, the power is increased; if the target partition temperature value is higher than the preset temperature value, the power is decreased, so that the temperature value corresponding to each irradiation range approaches the preset temperature value and finally equals the preset temperature value, with high thermal uniformity, which brings convenience to the user. In addition, since only the target laser units are selected to be turned on and other laser units are turned off, energy is saved.

[0062] The above describes a laser heating method in an embodiment of the present application. Next, a laser heating device in an embodiment of the present application will be described. Please refer to Figure 3 , an embodiment of a laser heating device in an embodiment of the present application includes:

[0063] A determination unit 301, configured to determine and turn on multiple target laser units from multiple laser units, and determine target partitions according to the obtained thermal image including the object to be heated. The target laser unit is a laser unit whose emitted laser can irradiate the object to be heated. The target partition is an area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the bearing platform. The target laser unit and the target partition are in one-to-one correspondence;

[0064] An adjustment unit 302, configured to, for each target laser unit, obtain the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

[0065] In the embodiment of the present application, the determination unit 301 first determines and turns on a plurality of target laser units from the plurality of laser units, determines the target partition according to the acquired thermal image including the object to be heated, and then the adjustment unit 302 acquires the pixel temperature values of a plurality of pixels involved in the target partition corresponding to each target laser unit, and then determines the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; finally, obtains the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjusts the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value. The irradiation ranges of the lasers emitted by each target laser unit are different, and the corresponding target partitions are also different. The temperature of the irradiation range is the partition temperature value of the target partition. Therefore, based on the real-time target partition temperature value and the preset temperature value (the target value of thermal uniformity), the power of the corresponding target laser unit can be adjusted. If the target partition temperature value is lower than the preset temperature value, the power is increased; if the target partition temperature value is higher than the preset temperature value, the power is decreased, so that the temperature value corresponding to each irradiation range approaches the preset temperature value and finally equals the preset temperature value, with high thermal uniformity, which brings convenience to the user.

[0066] A laser heating device in the embodiment of the present application will be described in detail below. Another embodiment of the laser heating device in the embodiment of the present application includes:

[0067] A determination unit, configured to determine and turn on a plurality of target laser units from the plurality of laser units, and determine the target partition according to the acquired thermal image including the object to be heated. The target laser unit is a laser unit whose emitted laser can irradiate the object to be heated. The target partition is an area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the bearing platform. The target laser unit corresponds to the target partition one by one;

[0068] An adjustment unit, configured to, for each target laser unit, acquire the pixel temperature values of a plurality of pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

[0069] The determination unit is specifically configured to:

[0070] According to the opening instruction for the target laser unit among the plurality of laser units input by the user, control the target laser unit to be in the on state;

[0071] Obtain at least one set of pixel point coordinate groups preset for the target laser unit, where each pixel point coordinate group includes multiple pixel point coordinates, and the pixel point coordinate groups correspond one-to-one with the target laser unit;

[0072] For each set of pixel point coordinate groups, determine the position range of the pixels corresponding to the pixel point coordinates involved in the pixel point coordinate group on the thermal image containing the object to be heated as the target partition corresponding to the target laser unit corresponding to the pixel point coordinate group.

[0073] The determination unit is specifically configured to:

[0074] Obtain a thermal image containing the object to be heated and multiple irradiation range dividing lines, where the irradiation range dividing lines are the lines on the bearing platform for dividing the irradiation ranges of the lasers emitted by different laser units on the bearing platform;

[0075] Divide the thermal image according to the multiple irradiation range dividing lines to obtain multiple partitions, where the partitions are the regions on the thermal image corresponding to the irradiation ranges of the lasers emitted by the laser units on the bearing platform;

[0076] Determine the partitions covered by the region of the object to be heated on the thermal image as the target partitions, and calculate the center point coordinates of the target partitions according to the coordinates of the pixels involved in the target partitions;

[0077] Based on the preset relationship between the center point coordinates of the partitions and the laser units, determine the laser unit corresponding to the center point coordinates of the target partition as the target laser unit, and control the target laser unit to be in the on state.

[0078] The adjustment unit is specifically configured to:

[0079] For each target partition, determine the maximum value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition.

[0080] The adjustment unit is specifically configured to:

[0081] For each target partition, determine the average value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition.

[0082] The adjustment unit is specifically configured to:

[0083] Based on the preset relationship between the temperature difference and the power difference, obtain the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value;

[0084] Or,

[0085] Based on the proportional integral derivative control algorithm and the difference between the target partition temperature value and the preset temperature value, obtain the corresponding target power difference.

[0086] The determining unit is specifically configured to:

[0087] Determine and turn on multiple target laser units from multiple laser units, and keep the laser units other than the target laser units among the multiple laser units in the off state.

[0088] In the laser heating device of this embodiment, the functions and processes executed by each unit are similar to those of the laser heating device in the foregoing Figures 1 to 2 and will not be elaborated herein.

[0089] Figure 4 FIG. 14 is a schematic structural diagram of a laser heating device provided by an embodiment of the present application. The laser heating device 400 may include one or more central processing units (CPUs) 401 and a memory 405. One or more application programs or data are stored in the memory 405.

[0090] Among them, the memory 405 may be volatile storage or persistent storage. The program stored in the memory 405 may include one or more modules, and each module may include a series of instruction operations on the laser heating device 400. Further, the central processor 401 may be configured to communicate with the memory 405 and execute a series of instruction operations in the memory 405 on the laser heating device 400.

[0091] The laser heating device 400 may further include one or more power supplies 402, one or more wired or wireless network interfaces 403, one or more input / output interfaces 404, and / or one or more operating systems, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

[0092] The central processor 401 may execute the operations performed by the laser heating device in the foregoing Figures 1 to 2 and will not be elaborated herein.

[0093] The embodiment of the present application also provides a computer-readable storage medium, including instructions, which when running on a computer, cause the computer to execute the method in the foregoing embodiment.

[0094] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0095] It should be noted that although the steps in the flowcharts involved in the embodiments are drawn in sequence according to the arrows, unless there is a clear description in this article, the execution of these steps has no strict order limitation, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0096] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices, or units, and can be in electrical, mechanical, or other forms.

[0097] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] In addition, the functional units in each embodiment of this application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0099] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

Claims

1. A laser heating method, characterized in that, A controller applied to a heating system, the heating system further including a carrying platform and a plurality of laser units, with an object to be heated placed on the carrying platform, the method including: Determine and turn on a plurality of target laser units from the plurality of laser units, and determine a target partition according to a thermal image obtained that includes the object to be heated. The target laser units are laser units whose emitted lasers can irradiate the object to be heated, and the target partition is an area on the thermal image corresponding to the irradiation range of the lasers emitted by the target laser units on the carrying platform. The target laser units and the target partitions are in one-to-one correspondence. For each of the target laser units, obtain the pixel temperature values of a plurality of pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the plurality of pixels; obtain the corresponding target power difference according to the difference between the target partition temperature value and a preset temperature value, and adjust the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

2. The laser heating method according to claim 1, wherein The determining and turning on a plurality of target laser units from the plurality of laser units, and determining a target partition according to a thermal image obtained that includes the object to be heated, includes: According to an activation instruction for the target laser units among the plurality of laser units input by a user, control the target laser units to be in an activated state. Obtain at least one set of pixel point coordinate groups preset for the target laser units, where each set of pixel point coordinate groups includes a plurality of pixel point coordinates, and the sets of pixel point coordinate groups and the target laser units are in one-to-one correspondence. For each set of pixel point coordinate groups, determine the position range of the pixels corresponding to the pixel point coordinates involved in the set of pixel point coordinate groups on the thermal image obtained that includes the object to be heated as the target partition of the target laser unit corresponding to the set of pixel point coordinate groups.

3. The laser heating method according to claim 1, wherein The determining and turning on a plurality of target laser units from the plurality of laser units, and determining a target partition according to a thermal image obtained that includes the object to be heated, includes: Obtain the thermal image that includes the object to be heated and a plurality of irradiation range dividing lines, where the irradiation range dividing lines are lines on the carrying platform for dividing the irradiation ranges of the lasers emitted by different laser units on the carrying platform. Divide the thermal image according to the plurality of irradiation range dividing lines to obtain a plurality of partitions, where the partitions are areas on the thermal image corresponding to the irradiation ranges of the lasers emitted by the laser units on the carrying platform. Determine the partitions covered by the area of the object to be heated on the thermal image as the target partitions, and calculate the center point coordinates of the target partitions according to the coordinates of the pixels involved in the target partitions. Based on the relationship between the preset partition center point coordinates and the laser units, determine the laser unit corresponding to the center point coordinates of the target partition as the target laser unit, and control the target laser unit to be in an activated state.

4. The laser heating method according to claim 1, characterized in that, Determining the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels includes: For each of the target partitions, determining the maximum value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition.

5. The laser heating method according to claim 1, wherein Determining the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels includes: For each of the target partitions, determining the average value of the pixel temperature values of the multiple pixels involved in the target partition as the target partition temperature value of the target partition.

6. The laser heating method according to claim 1, wherein Obtaining the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value includes: Based on the relationship between the preset temperature difference and the power difference, obtaining the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value; Or, Based on the proportional integral derivative control algorithm and the difference between the target partition temperature value and the preset temperature value, obtaining the corresponding target power difference.

7. The laser heating method according to claim 1, wherein Determining and turning on multiple target laser units from the multiple laser units includes: Determining and turning on multiple target laser units from the multiple laser units, and maintaining the laser units other than the target laser units among the multiple laser units in the off state.

8. A laser heating device, characterized in that, Includes: A determination unit, configured to determine and turn on multiple target laser units from the multiple laser units, and determine a target partition according to a thermal image including the object to be heated, where the target laser unit is a laser unit whose emitted laser can irradiate the object to be heated, the target partition is an area on the thermal image corresponding to the irradiation range of the laser emitted by the target laser unit on the carrier platform, and the target laser units and the target partitions are in one-to-one correspondence; An adjustment unit, configured to, for each of the target laser units, obtain the pixel temperature values of multiple pixels involved in the target partition corresponding to the target laser unit, and determine the target partition temperature value of the target partition according to the pixel temperature values of the multiple pixels; Obtaining the corresponding target power difference according to the difference between the target partition temperature value and the preset temperature value, and adjusting the power of the target laser unit based on the target power difference to stabilize the target partition temperature value at the preset temperature value.

9. A laser heating device, characterized in that, Includes: A central processing unit, a memory, and an input / output interface; The memory is a transient storage memory or a persistent storage memory; The central processing unit is configured to communicate with the memory and execute the instruction operations in the memory to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Includes instructions that, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 7.

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