Laser power detection device, adjusting system and laser power adjusting method

Abstract

The embodiment of the invention belongs to the technical field of laser processing, and relates to a laser power detection device, an adjusting system and a laser power adjusting method. The laser power detection device comprises a base, a light splitting part and a laser power sensor. The base is provided with a containing cavity, a light inlet, a first light outlet channel and a second light outlet channel, and the light inlet is used for allowing laser to enter; the light splitting part is located in the containing cavity and used for splitting laser entering from the light inlet into first laser emitted along the first light emitting channel and second laser emitted along the second light emitting channel. The laser power sensor is located in the second light outlet channel and used for detecting the power of the second laser. After the laser enters the accommodating cavity, the laser is divided into first laser and second laser by the light splitting part. The first laser can be continuously used for laser processing, and the second laser is used as a detection source of the laser power sensor. Therefore, the laser power detection device provided by the embodiment of the invention can detect the laser power while performing laser processing.

Description

Technical Field

[0001] The present application relates to the field of laser processing technology, and more specifically, to a laser power detection device, a laser power adjustment system and a laser power adjustment method. Background Art

[0002] During laser processing, the actual power of the laser needs to be equal to the target power set in advance to ensure that the energy fluctuation of the laser during processing is within a certain range, thereby ensuring the accuracy and yield of the laser processed products. Therefore, it is necessary to detect the power of the laser.

[0003] The existing technology mainly uses a laser power meter to detect the power of the laser. After switching the laser power, the detection needs to control the laser to be turned on and off in a jog manner. The laser light energy is converted into heat through multiple jogs, and then the heat is converted into an electrical signal and output to the computer device, thereby obtaining the laser power. This detection method requires frequent jog detection when detecting medium and high power lasers, so the detection time is relatively long; at the same time, this detection method needs to fully receive the laser during detection, so laser processing cannot be performed at the same time.

[0004] In summary, the laser power detection equipment in the prior art cannot complete the laser power detection during processing, and the detection time is relatively long. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present application is that the laser power detection equipment in the prior art cannot complete the laser power detection during processing, and the detection time is relatively long.

[0006] In order to solve the above technical problems, the embodiment of the present application adopts the following solution:

[0007] A laser power detection device, the laser power detection device comprising:

[0008] A base, wherein the base is provided with a containing cavity, a light inlet, a first light outlet channel and a second light outlet channel, wherein the light inlet, the first light outlet channel and the second light outlet channel are connected to the containing cavity at one end and connected to the external environment at the other end, and the light inlet is used for laser entry;

[0009] A beam splitter, the beam splitter is located in the accommodating cavity and is used to split the laser light entering from the light inlet into a first laser light emitted along the first light output channel and a second laser light emitted along the second light output channel;

[0010] A laser power sensor is located at an end of the second light output channel away from the accommodating cavity and is used to detect the power of the second laser.

[0011] Further, the laser power detection device further includes a first lens and a second lens, the first lens includes a first convex surface and a first plane that are oppositely arranged, the second lens includes a second convex surface and a second plane that are oppositely arranged, the first lens and the second lens are both located in the second light output channel, and the second lens is close to the laser power sensor;

[0012] The first convex surface faces the accommodating cavity, the second convex surface faces the laser power sensor, the distance from the focus formed by the second laser passing through the first lens to the first plane is a first distance, the distance from the focus to the second convex surface is a second distance, and the first distance is greater than the second distance.

[0013] Furthermore, the laser power detection device further includes a light homogenizer, which is located between the second lens and the laser power sensor and is used to disperse and evenly irradiate the second laser emitted from the second lens to the laser power sensor.

[0014] Furthermore, a shielding portion is provided in the second light output channel, the shielding portion is located between the second lens and the first lens, and is used to shield the second laser. The shielding portion is provided with a conical hole, and the conical hole passes through the shielding portion. The cross-sectional area of ​​the conical hole gradually decreases along the direction from the first lens to the second lens, and is used to filter the light at the edge of the second laser.

[0015] Accordingly, the present application also provides a laser power regulation system, the laser power regulation system comprising:

[0016] A laser emitting module, wherein the laser emitting module is used to emit laser;

[0017] A laser power detection module, the laser power detection module is used to differentiate the laser into a first laser and a second laser, and detect the power of the second laser to generate a power signal, the first laser is used for laser processing;

[0018] A control module, the control module is used to generate a control instruction according to the power signal, and transmit the control instruction to the laser emission module to adjust the power of the laser;

[0019] Wherein, the laser power detection module includes the laser power detection device described in any one of the above embodiments.

[0020] Accordingly, the present application provides a laser power adjustment method, the laser power adjustment method comprising:

[0021] Differentiating the laser into a first laser and a second laser;

[0022] Acquire an actual power value, a preset target power value, a compensation upper limit value, and a compensation lower limit value of the second laser;

[0023] Obtaining a power difference value according to the actual power value and the preset target power value;

[0024] Compare the power difference with the compensation upper limit and the compensation lower limit respectively to obtain a control instruction;

[0025] According to the control instruction, the power of the laser is adjusted.

[0026] Furthermore, the specific steps of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser include:

[0027] Acquiring a power ratio of the laser to the second laser;

[0028] receiving the second laser, and multiplying the power of the second laser by the power ratio to obtain the actual power value; and / or,

[0029] The compensation upper limit value is the preset target power multiplied by a first proportionality coefficient, and the first proportionality coefficient ranges from 1 to 1.05; and / or,

[0030] The compensation upper limit value is the preset target power multiplied by a first proportional coefficient, and the first proportional coefficient ranges from 0.95 to 1.

[0031] Furthermore, the step of comparing the power difference with the compensation upper limit and the compensation lower limit respectively to obtain a control instruction and the step of adjusting the power of the laser according to the control instruction are specifically:

[0032] Determine whether the power difference is greater than the compensation upper limit, and if so, output a first control instruction as the control instruction; according to the first control instruction, reduce the power of the laser until the power difference is less than or equal to the compensation upper limit; and / or,

[0033] Determine whether the power difference is less than the compensation lower limit. If so, output the second control instruction as the control instruction; according to the second control instruction, increase the power of the laser until the power difference is greater than or equal to the compensation lower limit.

[0034] Furthermore, the step of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser further includes:

[0035] Preset an alarm upper limit value and an alarm lower limit value, wherein the alarm upper limit value is greater than the compensation upper limit value, and the alarm lower limit value is less than the compensation lower limit value;

[0036] The laser power adjustment method further comprises:

[0037] Determine whether the power difference is greater than the compensation upper limit value, and if so, continue to determine whether the power difference is greater than the alarm upper limit value, and if so, trigger a first alarm signal;

[0038] Determine whether the power difference is less than the compensation upper limit value, and if so, continue to determine whether the power difference is less than the alarm lower limit value, and if so, trigger a second alarm signal.

[0039] Further, the laser is set with a maximum power;

[0040] The step of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser specifically includes:

[0041] Setting a correction power percentage, wherein the correction power percentage is 1% to 100%;

[0042] The maximum power value is multiplied by the correction power percentage to obtain the preset target power value.

[0043] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0044] When the laser enters the containing cavity from the light inlet, it will be split by the beam splitter into a first laser that is directed toward the first light output channel to the external environment and a second laser that is directed along the second light output channel to the laser power sensor. At this time, the first laser can continue to be used for laser processing, and the second laser is used as a detection source for the laser power sensor. Therefore, the laser power detection device of the embodiment of the present application can detect the power of the laser while performing laser processing; at the same time, when detecting the laser, the energy of the second laser is smaller as a part of the laser. When the power of the laser changes, there is no need to re-start the laser power detection. Therefore, the detection of the laser power detection device of the embodiment of the present application is time-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 is a schematic structural diagram of a laser power detection device according to an embodiment of the present application;

[0047] Figure 2 is another structural schematic diagram of the laser power detection device according to an embodiment of the present application;

[0048] Figure 3 is a cross-sectional schematic diagram of a laser power detection device according to an embodiment of the present application;

[0049] Figure 4 A schematic diagram of a laser power adjustment system according to an embodiment of the present application;

[0050] Figure 5 It is a flow chart of the laser power adjustment method of an embodiment of the present application.

[0051] Reference numerals:

[0052] Laser power detection device 10, focus 20, laser 30, first laser 31, second laser 32, laser emitting module 41, laser power detection module 42, control module 43, base 100, first light output channel 101, second light output channel 102, light inlet 103, first base 110, second base 120, shielding part 121, conical hole 122, spectrometer 200, laser power sensor 300, first lens 400, second lens 500, and light homogenizer 600. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0054] In this application, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. In addition, in the description of this application, the term "including" means "including but not limited to". The terms first, second, third, etc. are used only as labels and do not impose numerical requirements or establish an order.

[0055] In this application, "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural.

[0056] In the present application, "at least one" means one or more, and "plurality" means two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively.

[0057] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0058] Please refer to Figures 1 to 3 The present application provides a laser power detection device 10, the laser power detection device 10 comprising:

[0059] The base 100 is provided with a receiving cavity (not marked in the figure), a light inlet 103, a first light outlet channel 101 and a second light outlet channel 102. The light inlet 103, the first light outlet channel 101 and the second light outlet channel 102 are connected to the receiving cavity at one end and connected to the external environment at the other end. The light inlet 103 is used for the laser 30 to enter;

[0060] The beam splitter 200 is located in the accommodating cavity and is used to split the laser light 30 entering from the light inlet 103 into a first laser light 31 emitted along the first light outlet channel 101 and a second laser light 32 emitted along the second light outlet channel 102;

[0061] The laser power sensor 300 is located at one end of the second light output channel 102 away from the accommodating cavity and is used to detect the power of the second laser 32 .

[0062] In this embodiment, the laser power sensor 300 can only withstand weaker lasers and cannot directly withstand medium and high lasers used for laser 30 processing for a long time. When the laser 30 enters the accommodating cavity from the light inlet 103, it will be divided by the light splitter 200 into a first laser 31 that is directed toward the first light output channel 101 to the external environment and a second laser 32 that is directed along the second light output channel 102 to the laser power sensor 300. At this time, the first laser 31 can continue to be used for laser 30 processing, and the second laser 32 is used as a detection source for the laser power sensor 300. Therefore, the laser power detection device 10 of the embodiment of the present application can detect the power of the laser 30 while performing laser 30 processing; at the same time, when detecting the laser 30, the second laser 32, as a part of the laser 30, has a small energy and can be adapted and received and detected by the laser power sensor 300. Therefore, when the power of the laser 30 changes, there is no need to restart-shutdown the laser power detection device 10 to detect the power of the laser 30, so the detection of the laser power detection device 10 of the embodiment of the present application is short in time and high in efficiency.

[0063] It should be understood that the beam splitter 200 includes at least one of a beam splitter polarizer, a beam splitter prism and a dichroic mirror. The power ratio of the second laser 32 to the laser 30 can be 0.01% to 0.5%, preferably 0.2%. The laser power sensor 300 can convert the energy of the second laser 32 into at least one of voltage, current and resistance, and then determine the power of the second laser 32 according to the changes in the voltage, current and resistance. After confirming the power ratio of the second laser 32 to the laser 30 according to the selection of the beam splitter 200, the power of the laser 30 and the first laser 31 can be obtained.

[0064] For further information, please refer to Figures 1 to 3 The laser power detection device 10 further includes a first lens 400 and a second lens 500, the first lens 400 includes a first convex surface and a first plane that are oppositely arranged, the second lens 500 includes a second convex surface and a second plane that are oppositely arranged, the first lens 400 and the second lens 500 are both located in the second light output channel 102, and the second lens 500 is close to the laser power sensor 300;

[0065] Among them, the first convex surface faces the accommodating cavity, the second convex surface faces the laser power sensor 300, the distance from the focus 20 formed by the second laser 32 passing through the first lens 400 to the first plane is the first distance, and the distance from the focus 20 to the second convex surface is the second distance, and the first distance is greater than the second distance.

[0066] In this embodiment, the second laser 32 separated by the beam splitter 200 is relatively dispersed and non-uniform. Therefore, when the second laser 32 is directly irradiated to the laser power sensor 300 , the value detected by the laser power sensor 300 may fluctuate, that is, the detection accuracy is low.

[0067] In the laser power detection device 10 of the present embodiment, since the first distance is greater than the second distance, the irradiation range of the second laser 32 emitted from the first plane is greater than the irradiation range when the second laser 32 enters the second convex surface, that is, a Kepler beam reduction system is formed between the first lens 400 and the second lens 500, thereby reducing the irradiation range of the second laser 32 and reducing its dispersion, thereby effectively improving the detection accuracy of the laser power sensor 300.

[0068] It should be understood that please refer to Figures 1 to 3 The axis of the first lens 400, the second lens 500 and the laser power detection device 10 (along Figure 3 The Z direction in the figure is the axis direction) may be at a certain distance from the second laser 32 emitted from the light splitter 200, for example, there is a certain gap between the center of the accommodating cavity and the central axis of the second light exit channel 102. At this time, the laser 30 received by the laser power sensor 300 is not the central part (higher power part) of the second laser 32, but the part relatively close to the edge (lower power part), so the power of the second laser 32 received by the laser power detection device 10 can be effectively reduced. The base 100 may include a first base 110 and a second base 120, and the connecting surface between the first base 110 and the second base 120 is an inclined surface as shown in convex 3. At this time, by changing the contact area of ​​the inclined surface between the first base 110 and the second base 120, that is, by relatively moving the first base 110 and the second base 120 along the X axis in the figure, the distance between the axis of the first lens 400, the second lens 500 and the laser power detection device 10 and the second laser 32 emitted from the light splitter 200 can be changed.

[0069] For further information, please refer to Figures 1 to 3 The laser power detection device 10 further includes a light homogenizer 600 , which is located between the second lens 500 and the laser power sensor 300 and is used to evenly distribute the second laser 32 emitted from the second lens 500 to the laser power sensor 300 .

[0070] In this embodiment, the light homogenizer 600 can make the second laser 32 dispersed and evenly irradiate the laser power sensor 300. Even if the laser 30 entering the light inlet 103 is offset, it can ensure that the power value of the second laser 32 received by the laser power sensor 300 remains unchanged, thereby improving the detection accuracy of the laser power sensor 300.

[0071] It should be understood that the light homogenizer 600 includes at least one of a lens with microstructures, an integrating sphere and a light homogenizer rod. An attenuation plate may be provided between the light homogenizer 600 and the second lens 500, so as to further weaken the power of the second laser 32 received by the laser power sensor 300.

[0072] For further information, please refer to Figures 1 to 3 A shielding portion 121 is provided in the second light output channel 102. The shielding portion 121 is located between the second lens 500 and the first lens 400 and is used to shield the second laser 32. The shielding portion 121 is provided with a conical hole 122. The conical hole 122 penetrates the shielding portion 121, and the cross-sectional area of ​​the conical hole 122 gradually decreases along the direction from the first lens 400 to the second lens 500, and is used to filter the light at the edge of the second laser 32.

[0073] In this embodiment, the conical hole 122 can only allow part of the second laser 32 (the part close to the center of the irradiation range) to pass through, thereby filtering out some useless light at the edge of the irradiation range of the second laser 32 with the help of the shielding portion 121, thereby avoiding interference of the laser power sensor 300 caused by astigmatism.

[0074] Accordingly, please refer to Figure 4 The present application also provides a laser power regulation system, the laser power regulation system comprising:

[0075] A laser emitting module 41, the laser emitting module 41 is used to emit laser 30;

[0076] The laser power detection module 42 is used to separate the laser 30 into the first laser 31 and the second laser 32, and detect the power of the second laser 32 to generate a power signal. The first laser 31 is used for laser 30 processing;

[0077] A control module 43, which is used to generate a control instruction according to the power signal and transmit the control instruction to the laser emission module 41 to adjust the power of the laser 30;

[0078] The laser power detection module 42 includes any one of the laser power detection devices 10 in the above embodiments.

[0079] In this embodiment, the laser 30 emitted by the laser emitting module 41 to the laser power detection module 42 can be divided into the first laser 31 and the second laser 32, so the power of the laser 30 can be effectively reduced for detection by the laser power sensor 300 in the laser power detection device 10, and at the same time, the processing of the product is completed by the first laser 31. The laser power sensor 300 can convert the detected power of the second laser 32 into a power signal. The control module 43 can adjust the power of the laser 30 according to the control instruction, thereby changing the power of the first laser 31, and realizing real-time detection and regulation of the power of the laser 30 processed by the laser 30.

[0080] It should be understood that the power signal includes at least one of voltage, current and resistance. The control module 43 may include a welding control card and a host computer. The welding control card can be connected to the laser power sensor 300 to receive the power signal from the laser power sensor 300 and convert the power signal into information that can be processed by the host computer (computer, etc.). The host computer can determine whether it is necessary to increase or decrease the power of the laser 30 emitted by the current laser emission module 41 according to the power signal, so as to control the welding control card to manipulate the size of the first laser 31 to reach a preset power value.

[0081] Accordingly, please refer to Figure 5 The present application provides a laser power adjustment method, the laser power adjustment method comprising:

[0082] S100, dividing the laser into a first laser and a second laser;

[0083] S200, obtaining an actual power value, a preset target power value, a compensation upper limit value, and a compensation lower limit value of the second laser;

[0084] S300, obtaining a power difference value according to the actual power value and the preset target power value;

[0085] S400, comparing the power difference with the compensation upper limit and the compensation lower limit respectively to obtain a control instruction;

[0086] S500, adjust the laser power according to the control instruction.

[0087] In this embodiment, firstly, the laser is divided into the first laser and the second laser, so the first laser can be used for laser welding processing, and the second laser detection does not affect the processing of the first laser, so the laser power adjustment method of this embodiment can detect the power of the laser in real time. Secondly, the second laser is divided by the laser, so its power is relatively low and can be detected by a laser energy detection structure such as a laser power sensor.

[0088] It should be understood that the upper limit value of compensation and the lower limit value of compensation can be percentages and / or fixed values. When the upper limit value of compensation and the lower limit value of compensation are fixed values, the power difference value can also be a fixed value. At this time, if the power difference value is greater than the upper limit value of compensation, the power of the laser is reduced through a control instruction. If the power difference value is less than the lower limit value of compensation, the power of the laser is increased through a control instruction. When it is determined that the power difference value is less than the upper limit value of compensation, the power difference value should continue to be compared with the lower limit value of compensation.

[0089] For further information, please refer to Figure 4 The specific steps of obtaining the actual power value, the preset target power value, the upper compensation limit value and the lower compensation limit value of the second laser include:

[0090] Obtaining a power ratio of the laser to the second laser;

[0091] receiving a second laser, and multiplying the power of the second laser by the power ratio to obtain an actual power value; and / or,

[0092] The compensation upper limit value is a preset target power multiplied by a first proportional coefficient, and the first proportional coefficient ranges from 1 to 1.05; and / or,

[0093] The compensation upper limit value is the preset target power multiplied by the first proportional coefficient, and the first proportional coefficient ranges from 0.95 to 1.

[0094] In this embodiment, the power of the second laser is much smaller than the power of the laser, so it cannot be equal to the actual power value of the laser. When calculating the actual power value of the laser, it is necessary to multiply the power of the second laser by the power ratio of the laser to the second laser to obtain the actual power value of the laser. Since the first laser processes the product, the actual power value of the first laser can also be directly calculated by the power ratio of the first laser to the second laser.

[0095] Methods for obtaining the power ratio of the laser and the second laser include: obtaining it by directly looking up the parameters of a device that splits the laser into the first laser and the second laser. For example, when the laser is split into the first laser and the second laser by a spectroscopic polarizer, the transmittance and extinction ratio of the spectroscopic polarizer can be directly queried to obtain the power ratio of the second laser and the first laser to the laser.

[0096] When the first proportional coefficient is in the range of 1 to 1.05, it can effectively avoid the compensation upper limit being too large to calibrate the laser size, thereby making the power of the first laser processing within a preset range. When the second proportional coefficient is in the range of 0.95 to 1, it can effectively avoid the compensation lower limit being too large to calibrate the laser size, thereby making the power of the first laser processing within a preset range.

[0097] For further information, please refer to Figure 5 The power difference is compared with the compensation upper limit and the compensation lower limit respectively to obtain the control instruction and the step of adjusting the laser power according to the control instruction is specifically as follows:

[0098] Determine whether the power difference is greater than the compensation upper limit, and if so, output a first control instruction as the control instruction; according to the first control instruction, reduce the power of the laser until the power difference is less than or equal to the compensation upper limit; and / or,

[0099] Determine whether the power difference is less than the compensation lower limit. If so, output a second control instruction as the control instruction; according to the second control instruction, increase the power of the laser until the power difference is greater than or equal to the compensation lower limit.

[0100] In this embodiment, it is possible to determine whether to output the first instruction or the second instruction by the difference between the power difference and the compensation upper limit and the compensation lower limit, thereby completing the regulation of the laser size. It should be understood that the difference between the power difference and the compensation upper limit may be determined first, or the difference between the power difference and the compensation lower limit may be determined first, and then the compensation upper limit may be determined.

[0101] For further information, please refer to Figure 5 The step of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser further includes:

[0102] The alarm upper limit value and the alarm lower limit value are preset, the alarm upper limit value is greater than the compensation upper limit value, and the alarm lower limit value is less than the compensation lower limit value;

[0103] The steps of the laser power adjustment method also include:

[0104] Determine whether the power difference is greater than the compensation upper limit value, if so, continue to determine whether the power difference is greater than the alarm upper limit value, if so, trigger the first alarm signal;

[0105] Determine whether the power difference is less than the compensation upper limit value. If so, continue to determine whether the power difference is less than the alarm lower limit value. If so, trigger the second alarm signal.

[0106] In this embodiment, the alarm upper limit value and the alarm lower limit value can promptly remind the laser processing operator to check the laser processed product and adjust the laser power in time to avoid waste.

[0107] It should be understood that the first alarm signal and the second alarm signal may be at least one of a sound signal, a light signal or a text signal.

[0108] For further information, please refer to Figure 5 , the laser is set to have a maximum power;

[0109] The steps of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser specifically include:

[0110] Set the correction power percentage, the correction power percentage is 1% ~ 100%;

[0111] Multiply the maximum power value by the correction power percentage to obtain the preset target power value.

[0112] In this embodiment, the laser has a maximum power and a minimum power. Before using the laser for processing, the preset target power value can be obtained by setting the correction power percentage. For example, when the maximum power is 6000W, ten correction power percentages of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% can be set. When it is necessary to control the preset target power of the laser, the corresponding correction power percentage can be directly selected without selecting a specific preset target power value. At this time, when the compensation upper limit value and the compensation lower limit value are the first proportional coefficient and the second proportional coefficient, there is no need to further convert the power difference into units, but by comparing the percentage difference between the power difference, the compensation upper limit value, and the compensation lower limit value, it is directly determined whether the laser size needs to be increased or reduced. It should be understood that the correction power percentage can be set to 11.1%, 11.11%, and other data, and its accuracy is adjusted according to actual needs.

[0113] For further information, please refer to Figure 5 , the laser may be a single-mode laser or a dual-mode laser (a laser with an inner ring and an outer ring). When the laser is a single-mode laser, it uses ten percentages with an interval of 10% between 10% and 100% as the correction power percentage to obtain the corresponding preset target power. However, the dual-mode laser requires multiple calibrations to obtain the preset target power corresponding to the correction power percentage. The reason is that when the inner and outer rings of the dual-mode laser are both 3000W lasers, if in the first case, the inner ring is controlled to output laser according to the correction power percentage of 50% and the outer ring is controlled to output laser according to the correction power percentage of 100%; in the second case, the inner ring is 100% corrected power percentage and the outer ring is 50% corrected power percentage. After the light of the inner and outer rings of the dual-mode laser is combined, the two will affect each other, and the total power of the dual-mode laser cannot be calculated by simply superimposing the inner and outer rings. For example: In the first case, the calculation formula for the output power of the dual-mode laser is not 3000Wx50%+3000Wx100%=4500W, it may be 4000W. The output power of the dual-mode laser in the second case is not 3000Wx100%+3000Wx50%=4500W, but may reach 5000W.

[0114] Therefore, when setting the correction power percentage of the dual-mode laser, it is necessary to calculate each correction power percentage of the inner ring and multiple correction power percentages of the outer ring one by one. Specifically, for example, to calculate the preset target power of the dual-mode laser through ten percentages from 10% to 100%, it is necessary to set the inner ring correction power percentage to 10%, and the outer ring to 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% corresponding calculations, and ten preset target powers will be obtained. In summary, when the preset target power of the dual-mode laser is 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, a total of ten correction power percentages, there are a total of 100 sets of preset target powers.

[0115] For further information, please refer to Figure 5 In this embodiment, because the upper computer, welding control card, computer and other equipment cannot directly obtain the actual power value of the second laser, when detecting the laser power of the second laser, it is usually necessary to convert the actual power value of the second laser into other information. Therefore, in this embodiment, it is necessary to convert the actual power value into information such as voltage, current or resistance, and then convert the above information into the corresponding laser power in the above equipment. When detecting the actual power of the second laser, the laser power sensor used has certain initial values ​​of voltage, current and resistance after being connected to the external circuit.

[0116] In order to solve the influence of the initial value on the actual power of the second laser, before detecting the actual power value of the second laser, the initial voltage, initial current and initial resistance of the laser power sensor can be measured by a multimeter or other device, so that after the measured second laser power is converted into voltage, current and resistance, the above initial voltage, initial current and initial resistance can be subtracted to avoid the initial voltage, initial current and initial resistance from interfering with the laser detection results.

[0117] For further reference, Figure 5 In the method of this embodiment, a collection interval can also be set, and the collection interval is the interval frequency at which the laser power sensor actively obtains the actual power of the second laser, thereby improving the timeliness of laser power detection according to demand.

[0118] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

[0119] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, combinations, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A laser power detection device, characterized in that: The laser power detection device comprises: A base, wherein the base is provided with a containing cavity, a light inlet, a first light outlet channel and a second light outlet channel, wherein the light inlet, the first light outlet channel and the second light outlet channel are connected to the containing cavity at one end and connected to the external environment at the other end, and the light inlet is used for laser entry; A beam splitter, the beam splitter is located in the accommodating cavity and is used to split the laser light entering from the light inlet into a first laser light emitted along the first light output channel and a second laser light emitted along the second light output channel; A laser power sensor is located at an end of the second light output channel away from the accommodating cavity and is used to detect the power of the second laser.

2. The laser power detection device according to claim 1, characterized in that: The laser power detection device further includes a first lens and a second lens, the first lens includes a first convex surface and a first plane that are oppositely arranged, the second lens includes a second convex surface and a second plane that are oppositely arranged, the first lens and the second lens are both located in the second light output channel, and the second lens is close to the laser power sensor; The first convex surface faces the accommodating cavity, the second convex surface faces the laser power sensor, the distance from the focus formed by the second laser passing through the first lens to the first plane is a first distance, the distance from the focus to the second convex surface is a second distance, and the first distance is greater than the second distance.

3. The laser power detection device according to claim 2, characterized in that: The laser power detection device further includes a light homogenizer, which is located between the second lens and the laser power sensor and is used to disperse and evenly irradiate the second laser emitted from the second lens to the laser power sensor.

4. The laser power detection device according to claim 2 or 3, characterized in that: A shielding portion is provided in the second light output channel, and the shielding portion is located between the second lens and the first lens, and is used to shield the second laser. The shielding portion is provided with a conical hole, and the conical hole passes through the shielding portion, and the cross-sectional area of ​​the conical hole gradually decreases along the direction from the first lens to the second lens, and is used to filter the light at the edge of the second laser.

5. A laser power adjustment system, characterized in that: The laser power adjustment system comprises: A laser emitting module, wherein the laser emitting module is used to emit laser; A laser power detection module, the laser power detection module is used to differentiate the laser into a first laser and a second laser, and detect the power of the second laser to generate a power signal, the first laser is used for laser processing; A control module, the control module is used to generate a control instruction according to the power signal, and transmit the control instruction to the laser emission module to adjust the power of the laser; Wherein, the laser power detection module includes the laser power detection device described in any one of claims 1 to 4 above.

6. A laser power adjustment method, characterized in that: The laser power adjustment method comprises: Differentiating the laser into a first laser and a second laser; Acquire an actual power value, a preset target power value, a compensation upper limit value, and a compensation lower limit value of the second laser; Obtaining a power difference value according to the actual power value and the preset target power value; Compare the power difference with the compensation upper limit and the compensation lower limit respectively to obtain a control instruction; According to the control instruction, the power of the laser is adjusted.

7. The laser power adjustment method according to claim 6, characterized in that: The specific steps of obtaining the actual power value, the preset target power value, the compensation upper limit value and the compensation lower limit value of the second laser include: Acquire a power ratio of the laser to the second laser; receive the second laser, and multiply the power of the second laser by the power ratio to obtain the actual power value; and / or, The compensation upper limit value is the preset target power multiplied by a first proportionality coefficient, and the first proportionality coefficient ranges from 1 to 1.05; and / or, The compensation upper limit value is the preset target power multiplied by a first proportional coefficient, and the first proportional coefficient ranges from 0.95 to 1.

8. The laser power adjustment method according to claim 6, characterized in that: The power difference is compared with the compensation upper limit and the compensation lower limit respectively to obtain a control instruction, and the step of adjusting the power of the laser according to the control instruction is specifically as follows: Determine whether the power difference is greater than the compensation upper limit, and if so, output a first control instruction as the control instruction; according to the first control instruction, reduce the power of the laser until the power difference is less than or equal to the compensation upper limit; and / or, Determine whether the power difference is less than the compensation lower limit, and if so, output a second control instruction as the control instruction; According to the second control instruction, the power of the laser is increased until the power difference is greater than or equal to the compensation lower limit.

9. The laser power adjustment method according to claim 6, characterized in that: The step of obtaining the actual power value, the preset target power value, the upper compensation limit value and the lower compensation limit value of the second laser further includes: Preset an alarm upper limit value and an alarm lower limit value, wherein the alarm upper limit value is greater than the compensation upper limit value, and the alarm lower limit value is less than the compensation lower limit value; The laser power adjustment method further comprises: Determine whether the power difference is greater than the compensation upper limit value, and if so, continue to determine whether the power difference is greater than the alarm upper limit value, and if so, trigger a first alarm signal; Determine whether the power difference is less than the compensation upper limit value, and if so, continue to determine whether the power difference is less than the alarm lower limit value, and if so, trigger a second alarm signal.

10. The laser power adjustment method according to any one of claims 6 to 9, characterized in that: The laser is set with a maximum power; The step of obtaining the actual power value, the preset target power value, the upper limit value of compensation and the lower limit value of compensation of the second laser specifically includes: Setting a correction power percentage, wherein the correction power percentage is 1% to 100%; The maximum power value is multiplied by the correction power percentage to obtain the preset target power value.

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