WO2023130631A1

WO2023130631A1 - Method and system for automatically detecting and compensating gv value in real time

Info

Publication number: WO2023130631A1
Application number: PCT/CN2022/091095
Authority: WO
Inventors: 王莉; 陈竣; 徐康; 龚正; 王建刚
Original assignee: 武汉华工激光工程有限责任公司
Priority date: 2022-01-10
Filing date: 2022-05-06
Publication date: 2023-07-13
Also published as: CN114054971B; TW202327775A; TWI814431B; CN114054971A; KR20230108725A

Abstract

A method for automatically detecting and compensating a GV value in real time. The method comprises: constructing a relation curve of a rotation angle and a GV value, the rotation angle corresponding to laser energy incident on a marking point; obtaining an image of the marking point during laser marking, and obtaining an actual GV value of the marking point on the basis of the obtained image; and when the actual GV value of the marking point exceeds a preset range, determining an angle for rotation according to the constructed relation curve of the rotation angle and the GV value, and adjusting the rotation angle to enable the laser energy incident on the marking point to be adapted to the actual GV value. Therefore, the problem that high volume products are scrapped due to a change in the GV value is solved. Also provided is a system for automatically detecting and compensating a GV value in real time, comprising: an emission assembly, a marking assembly, an imaging assembly, a control assembly, and a light polarization state adjustment assembly. The GV value can be automatically detected and compensated in real time by means of the arrangement of the assemblies.

Description

A method and system for automatic real-time GV value detection and compensation

technical field

The invention relates to the technical field of laser marking and detection, in particular to a method and system for automatic real-time GV value detection and compensation.

Background technique

With the development of science and technology, laser marking machine has become a common equipment in engraving and marking processing. It uses the laser beam to focus and burn on the surface of the workpiece to achieve marking processing. It is favored by the industry because of its high speed and high precision. . However, in the process of automatic processing, due to laser power attenuation, component aging and other uncontrollable factors, the GV value of the marking point changes. If this change is not detected or processed in time, it will easily lead to batch scrapping of product processing, which seriously affects production and processing. efficiency and product yield.

After searching, the Japanese patent with the publication number JP5589318B2 disclosed a laser marking method on September 17, 2014. This method changes the peak power of the pulsed light by changing the pulse duration, and then changes the processing speed without changing the laser marking method. The gray level of the marker pattern. European Patent Publication No. EP3088200B1 discloses a laser marking method on November 3, 2021. The method calculates the output power of the marking point according to the gray value of the marking point, and outputs the laser light with the calculated output power. The Chinese patent with the publication number CN112872603A disclosed on June 1, 2021 a method for preparing a casing. The method uses the gray value of the target pattern to set the laser energy for laser engraving, and performs laser engraving according to the set laser energy. Engraving. It can be seen that the aforementioned patents only disclose that the relationship between the gray value of the marking pattern and the laser energy can be used for laser marking, such as using this relationship to change the gray value of the marking pattern, or using this relationship to obtain laser light corresponding to the gray value. The marking power, etc., all consider the influence of the real-time GV value of the marking point on the marking effect during the laser marking process, and do not solve the problem of batch scrapping of products caused by changes in the real-time GV value.

At present, no relevant technology has been found to avoid the scrapping of large batches of products due to changes in GV values in automatic processing. Therefore, it is imperative to provide a real-time GV value detection and compensation method to effectively avoid the above risks.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a method and system for automatic real-time GV value detection and compensation to solve at least one of the above-mentioned technical problems.

According to one aspect of the description of the present invention, a method for automatic real-time GV value detection and compensation is provided, including:

Constructing the relationship curve between the rotation angle and the GV value, the rotation angle corresponds to the laser energy incident on the marking point;

Acquire the image of the marking point while laser marking, and obtain the actual GV value of the marking point based on the acquired image;

When the actual GV value of the marked point exceeds the preset range, the angle to be rotated is determined according to the established relationship between the rotation angle and the GV value, and the laser energy incident on the marked point is adapted to the actual GV value by adjusting the rotation angle match.

In the above technical solution, a parameter variable that is functionally related to the GV value and controllable is established by constructing the relationship curve between the rotation angle and the GV value, and the actual GV value of the marking point is obtained at the same time as the laser marking, and when the actual GV value exceeds the preset In the range, the value of the controllable parameter variable is determined by the relationship curve between the rotation angle and the GV value constructed. By changing the value of this parameter variable, the actual GV value is controlled within the standard range, thereby solving the problem of mass production due to the change of the GV value. The problem of product obsolescence.

As a further technical solution, the method further includes: constructing a light polarization adjustment component on the optical path of the laser marking, the light polarization adjustment component has an adjustable angle, and adjusting the angle of the light polarization adjustment component takes place When changing, the intensity and direction of the light incident on the marking point through the light polarization adjustment component also change.

This technical solution uses the light polarization adjustment component on the laser marking optical path to adjust the light intensity of the outgoing laser, so that the laser energy incident on the marking point through the light polarization adjustment component changes with the change of the angle. By adjusting the angle, this controllable The variable realizes the adjustment of the laser energy incident on the marking point, so that the adjusted laser energy can provide the GV value of the marking point that meets the product quality requirements during marking, and avoids the product scrapping problem caused by the change of the GV value.

As a further technical solution, the optical polarization adjustment component includes a movable polarizer and a fixed polarizer arranged in sequence along the optical path of the laser marking, and the movable polarizer can rotate relative to the fixed polarizer.

This technical scheme utilizes the principle of asymmetry of polarized light, and changes the polarization state of the light passing through the fixed polarizer by controlling the angle of the movable polarizer, so that the characteristics of the light wave incident on the surface of the product through the light polarization adjustment component change, while Changes in the light wave characteristics lead to changes in the effect of the beam on the surface of the product, that is, the GV value of the marking point has changed. Therefore, by adjusting the rotation angle of the movable polarizer relative to the fixed polarizer, the marking point can be changed. GV value, similarly, when the GV value of the marking point changes, the change in GV value can also be compensated by adjusting the rotation angle of the movable polarizer relative to the fixed polarizer.

As a further technical solution, constructing the relationship curve between rotation angle and GV value further includes: setting the rotation starting point and single rotation angle of the movable polarizer; rotating the movable polarizer clockwise or counterclockwise, and recording The actual angle of the lower active polarizer and the corresponding GV value of the marked point; according to the recorded actual angle of the multiple groups of active polarizers and the corresponding GV value of the marked point, a relationship curve between the rotation angle and the GV value is constructed.

This technical scheme uses the principle that the GV value of the marking point is related to the laser energy incident on the marking point, and the change of the GV value of the marking point corresponds to the change of the laser energy incident on the marking point, and the laser energy incident on the marking point The change corresponds to the change of the light intensity incident on the marking point, and the change of the light intensity incident on the marking point corresponds to the angle change of the movable polarizer relative to the fixed polarizer. Finally, the relationship between the rotation angle and the GV value is constructed. Link the GV value of the marking point with the controllable angle variable, and compensate the change of GV value by adjusting the angle variable, and compensate the change of GV value caused by other uncontrollable factors such as laser power attenuation and component aging.

As a further technical solution, when the movable polarizer is rotated to be parallel to the polarization direction of the fixed polarizer, the intensity of the light passing through the light polarization adjustment component is maximum; when the movable polarizer is rotated to be parallel to the fixed polarizer When the polarization direction of the mirror is vertical, the intensity of the light passing through the light polarization adjustment component is minimum.

In this technical solution, the light of the laser becomes polarized light in one direction after passing through the movable polarizer (the direction of the polarized light can be changed by rotating the angle), and this polarized light will pass through the fixed polarizer immediately, and because the polarizer Only the vibration parallel to the polarization direction is allowed to pass through, while the light vibrating perpendicular to this direction is filtered out. Therefore, when the polarization direction of the movable polarizer and the fixed polarizer are completely parallel, the light passing through the fixed polarizer reaches the strongest. And it is the minimum when it is vertical.

As a further technical solution, the method further includes: when the actual GV value of the marked point exceeds the preset range, calculating the difference between the actual GV value and the standard GV value, based on the difference and the constructed rotation angle and GV The value relationship curve determines the rotation angle required to compensate for this difference, and the active polarizer is rotated by the rotation angle to match the laser energy incident on the marking point with the actual GV value.

In this technical solution, a standard GV value is first determined for different equipment or products, and the acceptable GV value preset range is determined based on the standard GV value. During the automatic processing process, the GV value of the product marking point is obtained in real time, and the Whether the GV value is within the preset range, if not, then substitute the difference between the GV value and the standard GV value into the constructed rotation angle and GV value relationship curve to obtain the angle that the active polarizer needs to rotate, so that the active polarizer performs corresponding Angle rotation, changing the laser energy incident on the marking point, the GV value beyond the preset range can be compensated within the normal range,

According to one aspect of the description of the present invention, a system for automatic real-time GV value detection and compensation is provided, including an emission component, a marker component, an imaging component, a control component, and a light polarization adjustment component, the emission component, the light polarization adjustment component and The marking assembly is arranged on the laser marking optical path, the imaging assembly is arranged on the GV value detection optical path, and the emitting assembly, the marking assembly, the imaging assembly and the light polarization adjustment assembly are respectively connected with the control assembly; the emitting assembly is used for laser emission The marking component is used to mark the product; the imaging component is used to obtain the mark point image while marking and send it to the control component; the control component is used to analyze the actual GV value of the mark point according to the mark point image , and when the actual GV value exceeds the preset range, the rotation angle to be adjusted is determined according to the constructed relationship curve between the rotation angle and the GV value, and the rotation angle command is output to the light polarization adjustment component; the light polarization adjustment component is used for Angle rotation is carried out according to the rotation angle command, so that the laser energy transmitted through the polarization state rotation component and incident on the marking point matches the actual GV value.

In the above technical solution, the control component controls the emitting component and the marking component to realize laser marking on the surface of the product, and at the same time controls the imaging component to obtain the image of the marking point while laser marking, and obtain the actual GV value of the marking point based on the acquired image, When the actual GV value exceeds the preset range, output the rotation angle to the light polarization adjustment component, and control the light polarization adjustment component to adjust the laser energy incident on the marking point to compensate the actual GV value variation, so that the final marked The product meets the processing quality requirements, and solves the problem of scrapping a large number of products due to changes in the GV value.

As a further technical solution, the light polarization state adjusting component is composed of a movable polarizer and a fixed polarizer, and the movable polarizer can be rotated by a preset angle relative to the fixed polarizer. This technical solution provides a means to adjust the controllable variable of the laser energy incident on the marking point. Using the asymmetric principle of polarized light, the polarization state of the light wave passing through the fixed polarizer is changed by controlling the angle of the movable polarizer, thereby changing the The laser energy incident on the marking point achieves the purpose of changing the laser energy through the change of the polarization rotation angle, and then compensating the change of the GV value through the change of the laser energy.

As a further technical solution, the movable polarizer is connected with a driving component; the driving component is connected with the control component, and is used to drive the movable polarizer to rotate a preset angle under the control of the control component. The technical solution realizes the automatic rotation of the movable polarizer through the cooperation of the control component and the driving component, and the driving component can be realized by a stepping motor or other driving devices capable of driving the movable polarizer to rotate at a specific angle.

As a further technical solution, the system further includes a return component, which is used to guide the emitted laser light to the marking component, and guide the light reflected by the marking point to the imaging component. The technical scheme realizes the close arrangement of the emitting component, the marking component, the imaging component and the light polarization adjustment component through the foldback component, realizes the high integration of the overall device, and reduces the occupied volume of the device. Furthermore, control components can be integrated with other components or set up independently.

Compared with prior art, the beneficial effect of the present invention is:

(1) The present invention provides a method, which establishes a controllable parameter variable that is functionally related to the GV value by constructing the relationship curve between the rotation angle and the GV value, obtains the actual GV value of the marking point at the same time as the laser marking, and When the actual GV value exceeds the preset range, the value of the controllable parameter variable is determined through the constructed rotation angle and GV value relationship curve, and the actual GV value is controlled within the standard range by changing the value of this parameter variable, thereby solving the problem. The problem of scrapping a large number of products due to changes in the GV value.

(2) The present invention provides a kind of system, this system realizes laser marking processing on the product surface by controlling the emission component and the marking component through the control component, controls the imaging component to obtain the image of the marking point while laser marking at the same time, and based on the image obtained Get the actual GV value of the marking point, when the actual GV value exceeds the preset range, output the rotation angle to the light polarization adjustment component, and control the light polarization adjustment component to adjust the laser energy incident on the marking point to compensate for the actual GV value Change amount, so that the final marked products meet the processing quality requirements, and solve the problem of scrapping large batches of products due to changes in GV values.

(3) The present invention utilizes the asymmetric principle of polarized light to realize the controllable adjustment of laser energy through two polarizers, and establishes a correlation between the relative rotation angle between the two polarizers and the GV value of the marking point, through The change of the rotation angle changes the laser energy incident on the marking point, and then compensates the change of the GV value of the marking point, which solves the problem of the GV value change of the marking point caused by other uncontrollable factors such as laser power attenuation and component aging, and further solves the problem. The problem of scrapping a large number of products due to the change of the GV of the marking point.

(4) The present invention detects the GV value of the marking point synchronously while laser marking, and compensates the real-time change of the GV value by establishing a controllable variable associated with the GV value, and realizes the online GV value of the marking point in the automatic processing process. Real-time detection and adjustment improve processing efficiency and ensure processing quality.

Description of drawings

FIG. 1 is a schematic diagram of a system used in an automatic real-time GV value detection and compensation method according to an embodiment of the present invention.

Fig. 2 is a flowchart of a method for automatic real-time GV value detection and compensation according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of adjusting the rotation angle of polarized light according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a relationship curve between a rotation angle and a GV value according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an automatic real-time GV value detection and compensation system according to an embodiment of the present invention.

Detailed ways

The technical solutions of the various embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example 1

This embodiment provides a method for automatic real-time GV value detection and compensation. The method is implemented by a system that can simultaneously realize laser marking processing and GV value detection. As shown in Figure 1, the system includes a laser, a marking head , an imaging system and a light polarization adjustment component (not shown).

As shown in Figure 2, the method specifically includes:

S1, construction of the GV value correlation relationship: constructing a relationship curve between the rotation angle and the GV value, the rotation angle corresponds to the laser energy incident on the marking point.

As shown in Figure 3, the optical polarization adjustment component is composed of a movable polarizer and a fixed polarizer, the movable polarizer is set as polarizer P1, the fixed polarizer is set as polarizer P2, and the laser light emitted by the laser passes through polarizer P1 in turn , Polarizer P2, and the marking head are incident on the surface of the product.

Specifically, constructing the relationship curve between rotation angle and GV value includes: setting the rotation starting point and single rotation angle of the movable polarizer; rotating the movable polarizer clockwise or counterclockwise, and recording the active polarization The actual angle of the mirror and the corresponding GV value of the marked point; according to the recorded actual angle of multiple groups of movable polarizers and the corresponding GV value of the marked point, a relationship curve between the rotation angle and the GV value is constructed. During the construction, it is assumed that the laser energy incident on the movable polarizer remains unchanged, and only by changing the rotation angle of the movable polarizer relative to the fixed polarizer, the laser energy incident on the marking point is changed, and the corresponding marking point at this time is recorded GV value.

Different relationship curves between rotation angle and GV value can be constructed for different equipment or products. As shown in FIG. 4 , the table below the figure shows multiple sets of rotation angles and GV values obtained in this embodiment, and the curve above the figure shows the change trend of these data. When the movable polarizer is rotated to be parallel to the polarization direction of the fixed polarizer, the intensity of the light passing through the fixed polarizer is maximum; when the movable polarizer is rotated to be perpendicular to the polarization direction of the fixed polarizer, the lens The intensity of light passing through the fixed polarizer is minimal.

S2, GV value online detection: acquire the image of the marking point while laser marking, and obtain the actual GV value of the marking point based on the acquired image. At the same time as laser marking, the light reflected by the marking point on the product surface reaches the imaging component, and the imaging component acquires the real-time image of the current marking point and sends it to the control component. The control component obtains the actual GV value of the marking point based on image recognition.

The imaging component can be set on the reflective optical path, and the light reflected by the marking point on the product surface enters the marking head, passes through the marking head and then enters the imaging component to ensure the synchronization of laser marking and GV value detection.

Or, the imaging component can also be set above the product, and the marking head and the imaging component can be controlled synchronously by the control component to start, so as to realize the synchronization of laser marking and GV value detection.

S3, GV value automatic compensation: When the actual GV value of the marked point exceeds the preset range, determine the angle to be rotated according to the relationship curve between the constructed rotation angle and GV value, and adjust the rotation angle to make the laser incident on the marked point The energy matches the actual GV value.

During the automatic processing, the GV value of the marked point of the product under the marking head is monitored in real time. When the actual GV value of the marked point exceeds the preset range, the difference between the actual GV value and the standard GV value is calculated, based on the difference and The constructed rotation angle and GV value relationship curve determines the rotation angle required to compensate for the difference, and rotates the movable polarizer to the rotation angle so that the laser energy incident on the marking point matches the actual GV value, and the GV value is compensated amount of change.

As shown in Figure 4, when the normal GV value is 120, the corresponding angle is -60° or 60°. When the GV value drops to 100 (that is, the difference is 20), the system will call the angle between 50° and 60° Trend segment, and calculated to adjust the GV value to 120 by rotating to 55° at this time. At the same time, the curve to the left of 0° is shifted 5° to the right, and the curve to the right of 0° is shifted to the left by 5°.

Furthermore, call the trend segment between 50° and 60°, where 50° corresponds to a GV value of 162, and 60° corresponds to a GV value of 123. In this range, set the angle as X and the GV value as Y. The trend segment can be approximately regarded as a linear relationship through the constructed relationship curve, so Y=aX+b, and the above two sets of data are brought into Y=-3.9X+357, |50<=X<=60|.

At this time, Y suddenly drops by 20, and Y1 is set as the GV function after the drop, then there is Y1=Y-20, Y1=-3.9X+357-20;

Since the GV value needs to be restored to 120, that is, Y1=120, 120=-3.9X+337, X=55.6° is obtained, that is, the angle to be rotated at this time is calculated. Considering the convenience of actual operation, on the premise of not affecting the effectiveness of GV compensation, the angular rotation of 55° can be performed to compensate the variation of GV value.

Example 2

As shown in Figure 5, this embodiment provides a system for automatic real-time GV value detection and compensation, including a transmitting component, a marking component, an imaging component, a control component, a reentry component and a light polarization adjustment component, the transmitting component, the light polarization The state adjustment component and the marking component are arranged on the laser marking optical path, the imaging component is arranged on the GV value detection optical path, and the emitting component, the marking component, the imaging component and the light polarization state adjusting component are respectively connected with the control component. The turnback component includes at least one mirror, which is used to turn back the light path on the laser marking light path and/or the GV value detection light path.

The emitting component is used for laser emission; the marking component is used for marking the product; the imaging component is used for obtaining the mark point image while marking and sending it to the control component; Analyze the actual GV value of the marked point, and when the actual GV value exceeds the preset range, determine the rotation angle to be adjusted according to the constructed rotation angle and GV value relationship curve and output the rotation angle command to the light polarization adjustment component; The light polarization state adjustment component is used to rotate the angle according to the rotation angle command, so that the laser energy incident on the marking point through the light polarization state rotation component is adapted to the actual GV value; the refolding component is used to convert the emitted laser The light reflected from the marking point is directed to the marking assembly, and the light reflected from the marking point is directed to the imaging assembly.

The light polarization state adjusting component is composed of a movable polarizer and a fixed polarizer, and the movable polarizer can rotate a preset angle relative to the fixed polarizer. This embodiment uses the asymmetric principle of polarized light to change the polarization state of the light wave passing through the fixed polarizer by controlling the angle of the movable polarizer, thereby changing the laser energy incident on the marking point, and realizing the change of the laser beam by changing the rotation angle of the polarized light. Energy, and then the purpose of compensating the change of GV value through the change of laser energy.

The movable polarizer is connected with a driving component; the driving component is connected with the control component, and is used to drive the movable polarizer to rotate a preset angle under the control of the control component. The driving component can be realized by a stepping motor or other driving devices capable of driving the movable polarizer to rotate by a specific angle.

In this embodiment, the control component controls the emission component and the marking component to realize the marking process of the laser on the product surface, and at the same time controls the imaging component to acquire the image of the marking point while laser marking, and obtains the actual GV value of the marking point based on the acquired image. When the actual GV value exceeds the preset range, the output rotation angle is given to the light polarization adjustment component, and the light polarization adjustment component is controlled to adjust the laser energy incident on the marking point to compensate for the change in the actual GV value, so that the final marked product It meets the processing quality requirements and solves the problem of scrapping large quantities of products due to changes in GV values.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.

Claims

A method for automatic real-time GV value detection and compensation, characterized in that it includes:

Constructing the relationship curve between the rotation angle and the GV value, the rotation angle corresponds to the laser energy incident on the marking point;

Acquire the image of the marking point while laser marking, and obtain the actual GV value of the marking point based on the acquired image;

When the actual GV value of the marked point exceeds the preset range, the angle to be rotated is determined according to the established relationship between the rotation angle and the GV value, and the laser energy incident on the marked point is adapted to the actual GV value by adjusting the rotation angle match.
A method for automatic real-time GV value detection and compensation according to claim 1, characterized in that the method further comprises: constructing a light polarization adjustment component on the laser marking optical path, and the light polarization adjustment component has an adjustable and when the angle of adjusting the light polarization adjustment component changes, the intensity and direction of the light passing through the light polarization adjustment component and incident on the marking point also changes.
A method for automatic real-time GV value detection and compensation according to claim 2, wherein the light polarization adjustment component includes a movable polarizer and a fixed polarizer arranged in sequence along the laser marking optical path, and the movable polarizer The mirror can be rotated relative to the fixed polarizer.
According to a method for automatic real-time GV value detection and compensation according to claim 3, it is characterized in that, constructing the relationship curve between rotation angle and GV value further includes: setting the rotation starting point and single rotation angle of the movable polarizer; clockwise or Rotate the active polarizer counterclockwise, and record the actual angle of the active polarizer and the corresponding marker point GV value for each rotation angle; Construct the relationship curve between rotation angle and GV value.
A method for automatic real-time GV value detection and compensation according to claim 3, characterized in that, when the movable polarizer is rotated to be parallel to the polarization direction of the fixed polarizer, the light transmitted through the light polarization adjustment component The intensity of light is maximum; when the movable polarizer is rotated to be perpendicular to the polarization direction of the fixed polarizer, the intensity of light passing through the light polarization adjustment component is minimum.
A method for automatic real-time GV value detection and compensation according to claim 3, characterized in that the method further comprises: when the actual GV value of the mark point exceeds the preset range, calculating the difference between the actual GV value and the standard GV value The difference, based on the difference and the relationship curve between the constructed rotation angle and the GV value, determines the rotation angle required to compensate the difference, and rotates the movable polarizer to the rotation angle so that the laser energy incident on the marking point is consistent with the actual The GV value matches.
A system for automatic real-time GV value detection and compensation, characterized in that it includes an emission component, a marking component, an imaging component, a control component and a light polarization adjustment component, and the emission component, the light polarization adjustment component and the marking component are arranged on the laser On the marking optical path, the imaging assembly is arranged on the GV value detection optical path, and the emitting assembly, the marking assembly, the imaging assembly and the light polarization adjustment assembly are respectively connected to the control assembly; the emitting assembly is used for laser emission; the marking assembly It is used to mark the product; the imaging component is used to obtain the mark point image while marking and send it to the control component; the control component is used to analyze the actual GV value of the mark point according to the mark point image, and the actual GV When the value exceeds the preset range, determine the rotation angle to be adjusted according to the relationship curve between the constructed rotation angle and the GV value, and output the rotation angle instruction to the light polarization adjustment component; The angle is rotated so that the laser energy incident on the marking point through the light polarization rotation component matches the actual GV value.
A system for automatic real-time GV value detection and compensation according to claim 7, wherein the optical polarization adjustment component is composed of a movable polarizer and a fixed polarizer, and the movable polarizer can be polarized relative to the fixed polarizer. The mirror rotates to a preset angle.
A system for automatic real-time GV value detection and compensation according to claim 8, wherein the movable polarizer is connected with a driving component; the driving component is connected with the control component for driving under the control of the control component The active polarizer rotates by a preset angle.
A system for automatic real-time GV value detection and compensation according to claim 7, characterized in that the system also includes a turnback component for guiding the emitted laser light to the marking component, and a light guide for reflecting the marking point to the imaging unit.