CN114326326A - Power control method and system for laser direct imaging equipment and related equipment - Google Patents
Power control method and system for laser direct imaging equipment and related equipment Download PDFInfo
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Abstract
The embodiment of the invention provides a power control method and system of a laser direct imaging device and a related device, which are used for improving the laser imaging precision. The method provided by the embodiment of the invention comprises the following steps: dynamically collecting light spot characteristic data of each laser; matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, wherein the characteristic database stores the mapping relation between the light spot characteristic data and the output power; and judging whether the difference between the current output power and the preset power of each laser exceeds a preset threshold, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power and the preset power of each laser to be smaller than the preset threshold.
Description
Technical Field
The invention relates to the technical field of laser imaging, in particular to a power control method and system of laser direct imaging equipment and related equipment.
Background
The laser direct imaging means controlling laser to irradiate points on the photosensitive coating on the exposure surface for exposure, and generating a preset image after developing. In a related art laser direct imaging apparatus (e.g., the laser direct plate making apparatus and method for a flat screen printing plate, application No. 201310084860.3), a laser array is composed of a plurality of lasers equidistantly distributed along a straight line, and a plurality of rows of pixels on an exposure surface are exposed by the plurality of lasers simultaneously.
In the scanning exposure process of the existing laser direct imaging equipment, the power of a laser is often required to be set to a fixed value according to the type of a photosensitive coating and the thickness of the photosensitive coating so as to completely expose the coating at a preset laser exposure point position. The applicant has noted that the power loss of the laser increases with time of use, so that the output power of the laser decreases at the same drive current. If the driving current of the laser is kept unchanged and the power loss of the laser is increased, the coating at the preset laser exposure point position cannot be completely exposed, so that the point to be exposed in the developed image cannot be developed, and imaging errors are caused. Therefore, how to improve the precision of laser imaging becomes an urgent problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a power control method and system of a laser direct imaging device and a related device, which are used for improving the laser imaging precision.
A first aspect of an embodiment of the present invention provides a method for controlling power of a laser direct imaging apparatus, where the method includes:
dynamically collecting light spot characteristic data of each laser;
matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, wherein the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and judging whether the difference between the current output power and the preset power of each laser exceeds a preset threshold, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power and the preset power of each laser to be smaller than the preset threshold.
Optionally, as a possible implementation manner, in an embodiment of the present invention, the spot feature data may include spot brightness and/or spot area.
Optionally, as a possible implementation manner, in the embodiment of the present invention, the dynamically acquiring the spot characteristic data of each laser may include:
controlling a CCD camera to periodically shoot light spot images of each laser under the same external environment;
and extracting the light spot characteristic data of each laser by adopting an image recognition algorithm.
Optionally, as a possible implementation manner, in an embodiment of the present invention, the adjusting the driving power of the corresponding laser may include:
determining the difference grade between the current output power and the preset power of each laser;
and adjusting the driving current value of the corresponding laser according to the difference grade.
A second aspect of an embodiment of the present invention provides a power control system for a laser direct imaging apparatus, where the power control system includes:
the acquisition module is used for dynamically acquiring the light spot characteristic data of each laser;
the identification module is used for matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, and the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and the processing module is used for judging whether the difference between the current output power of each laser and the preset power exceeds a preset threshold value or not, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power of each laser and the preset power to be smaller than the preset threshold value.
Optionally, as a possible implementation, the spot characteristic data may include spot brightness and/or spot area.
Optionally, as a possible implementation, the acquisition module may include:
the control unit is used for controlling the CCD camera to periodically shoot the light spot images of the lasers under the same external environment;
and the identification unit extracts the light spot characteristic data of each laser by adopting an image identification algorithm.
Optionally, as a possible implementation, the processing module may include:
the first processing unit is used for determining the difference level between the current output power of each laser and the preset power;
and the second processing unit is used for adjusting the driving current value of the corresponding laser according to the difference grade.
A third aspect of embodiments of the present invention provides a computer apparatus, which includes a processor, and the processor is configured to implement the steps in any one of the possible implementation manners of the first aspect and the first aspect when executing a computer program stored in a memory.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in any one of the possible implementations of the first aspect and the first aspect.
According to the technical scheme, the embodiment of the invention has the following advantages:
in the embodiment of the invention, the light spot characteristic data of each laser is dynamically acquired, then the light spot characteristic data is matched with a preset characteristic database to obtain the current output power of each laser, finally, whether the difference between the current output power and the preset power of each laser of the laser direct imaging equipment exceeds a preset threshold value is judged, and if the difference exceeds the preset threshold value, the driving power of the corresponding laser is adjusted, so that the difference between the current output power and the preset power of each laser is smaller than the preset threshold value. Compared with the constant laser driving power in the existing laser direct imaging equipment, the laser driving power can be dynamically adjusted, the stability of the laser output power in the laser direct imaging equipment is guaranteed, the imaging error caused by the condition that the power loss of the laser is increased can be effectively avoided, and the precision of laser imaging is improved.
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FIG. 1 is a schematic diagram of an embodiment of a power control method for a laser direct imaging apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an embodiment of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention is applied to laser direct imaging equipment, the laser direct imaging equipment comprises one laser or a plurality of lasers, and the laser direct imaging equipment can control the lasers to scan on the photosensitive coating along the pixel row direction and sequentially expose preset laser exposure points so as to form a desired image on the photosensitive coating.
The applicant has noted that the power consumption of the laser in a laser direct imaging device increases with time of use, so that the output power of the laser decreases at the same drive current. If the driving current of the laser is kept unchanged and the power loss of the laser is increased, the coating at the preset laser exposure point position cannot be completely exposed, so that the point to be exposed in the developed image cannot be developed, and imaging errors are caused. In order to reduce imaging errors, the embodiment of the application provides a method for dynamically adjusting the driving power of a laser in a laser direct imaging device, measuring the actual output of the laser, and dynamically adjusting the driving power of the laser according to the difference between the actual output power and the preset power.
Referring to fig. 1, a detailed flow of an embodiment of the present invention is described below, where an embodiment of a method for controlling a power of a laser direct imaging apparatus according to the present invention includes:
s101: and dynamically acquiring the light spot characteristic data of each laser.
In order to ensure the stability of the output power of the laser in the laser direct imaging device, the driving power of the laser needs to be dynamically adjusted. Therefore, in the embodiment of the application, the light spot characteristic data of each laser can be dynamically acquired, and the lasers are identified based on the light spot characteristic data.
Optionally, the CCD camera may be controlled locally or remotely to capture spot images of each laser periodically or according to a user instruction in the same external environment; and then, extracting the light spot characteristic data of each laser by adopting an image recognition algorithm. The specific image recognition algorithm can be selected from the related technologies, and details are not repeated here.
Optionally, the spot characteristic data may include spot brightness and/or spot area.
S102: and matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser.
In the embodiment of the application, the mapping relationship between the spot characteristic data and the output power can be stored in the characteristic database in advance, and then the spot characteristic data is matched with the preset characteristic database to obtain the current output power of each laser.
S103: and judging whether the difference between the current output power and the preset power of each laser exceeds a preset threshold, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power and the preset power of each laser to be smaller than the preset threshold.
After the current output power of each laser is obtained, whether the difference between the current output power of each laser and the preset power exceeds a preset threshold value or not can be judged, and if the difference exceeds the preset threshold value, the driving power of the corresponding laser is adjusted, so that the difference between the current output power of each laser and the preset power is smaller than the preset threshold value.
The specific preset threshold value can be reasonably set according to the type and the thickness of the actually adopted photosensitive coating, so that the corresponding photosensitive coating can be completely exposed within the range of the difference of the driving power and the preset threshold value, and the specific point is not limited.
For example, the process of adjusting the driving power of the corresponding laser may be: the method comprises the steps of firstly determining the difference grade between the current output power and the preset power of each laser, and then adjusting the driving current value of the corresponding laser (the laser with the power difference exceeding the preset threshold value) according to the difference grade. For example, each difference level corresponds to increasing or decreasing the laser drive current by a certain amount.
It is understood that the difference level can be reasonably set according to actual requirements, and is not limited herein. In addition, the driving power may also be adjusted by adjusting the driving voltage, and a specific implementation manner is not limited herein.
As can be seen from the above disclosure, in the embodiment of the present application, light spot feature data of each laser is dynamically acquired, then the light spot feature data is matched with a preset feature database to obtain the current output power of each laser, and finally, whether the difference between the current output power of each laser and the preset power of the laser direct imaging device exceeds a preset threshold is judged, and if the difference exceeds the preset threshold, the driving power of the corresponding laser is adjusted, so that the difference between the current output power of each laser and the preset power is smaller than the preset threshold. Compared with the constant laser driving power in the existing laser direct imaging equipment, the laser driving power can be dynamically adjusted, the stability of the laser output power in the laser direct imaging equipment is guaranteed, the imaging error caused by the condition that the power loss of the laser is increased can be effectively avoided, and the precision of laser imaging is improved.
On the basis of the foregoing embodiments, an embodiment of the present invention further provides a power control system for a laser direct imaging apparatus, which may include:
the acquisition module is used for dynamically acquiring the light spot characteristic data of each laser;
the identification module is used for matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, and the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and the processing module is used for judging whether the difference between the current output power of each laser and the preset power exceeds a preset threshold value or not, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power of each laser and the preset power to be smaller than the preset threshold value.
Optionally, as a possible implementation, the spot characteristic data may include spot brightness and/or spot area.
Optionally, as a possible implementation, the acquisition module may include:
the control unit is used for controlling the CCD camera to periodically shoot the light spot images of the lasers under the same external environment;
and the identification unit extracts the light spot characteristic data of each laser by adopting an image identification algorithm.
Optionally, as a possible implementation, the processing module may include:
the first processing unit is used for determining the difference level between the current output power of each laser and the preset power;
and the second processing unit is used for adjusting the driving current value of the corresponding laser according to the difference grade.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The power control system of the laser direct imaging device in the embodiment of the present invention is described above from the perspective of the modular functional entity, please refer to fig. 2, and the computer apparatus in the embodiment of the present invention is described below from the perspective of hardware processing:
the computer device 1 may include a memory 11, a processor 12 and an input output bus 13. The processor 11, when executing the computer program, implements the steps in the above-described embodiment of the power control method of the laser direct imaging apparatus shown in fig. 1, such as the steps 101 to 103 shown in fig. 1. Alternatively, the processor, when executing the computer program, implements the functions of each module or unit in the above-described device embodiments.
In some embodiments of the present invention, the processor is specifically configured to implement the following steps:
dynamically collecting light spot characteristic data of each laser;
matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, wherein the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and judging whether the difference between the current output power and the preset power of each laser exceeds a preset threshold, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power and the preset power of each laser to be smaller than the preset threshold.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
controlling a CCD camera to periodically shoot light spot images of each laser under the same external environment;
and extracting the light spot characteristic data of each laser by adopting an image recognition algorithm.
Optionally, as a possible implementation manner, the processor may be further configured to implement the following steps:
determining the difference grade between the current output power and the preset power of each laser;
and adjusting the driving current value of the corresponding laser according to the difference grade.
The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, and the like. The memory 11 may in some embodiments be an internal storage unit of the computer device 1, for example a hard disk of the computer device 1. The memory 11 may also be an external storage device of the computer apparatus 1 in other embodiments, such as a plug-in hard disk provided on the computer apparatus 1, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 11 may also include both an internal storage unit and an external storage device of the computer apparatus 1. The memory 11 may be used not only to store application software installed in the computer apparatus 1 and various types of data such as codes of computer programs, etc., but also to temporarily store data that has been output or is to be output.
The processor 12 may be a Central Processing Unit (CPU), controller, microcontroller, microprocessor or other data Processing chip in some embodiments, and is used for executing program codes stored in the memory 11 or Processing data, such as executing computer programs.
The input/output bus 13 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc.
Further, the computer apparatus may further include a wired or wireless network interface 14, and the network interface 14 may optionally include a wired interface and/or a wireless interface (such as a WI-FI interface, a bluetooth interface, etc.), which are generally used for establishing a communication connection between the computer apparatus 1 and other electronic devices.
Optionally, the computer device 1 may further include a user interface, the user interface may include a Display (Display), an input unit such as a Keyboard (Keyboard), and optionally, the user interface may further include a standard wired interface and a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in the computer device 1 and for displaying a visualized user interface.
Fig. 2 shows only the computer arrangement 1 with the components 11-14 and the computer program, and it will be understood by a person skilled in the art that the structure shown in fig. 2 does not constitute a limitation of the computer arrangement 1, and may comprise fewer or more components than shown, or a combination of certain components, or a different arrangement of components.
The present invention also provides a computer readable storage medium having a computer program stored thereon, which, when executed by a processor, can implement the steps in the embodiment of the power control method for a laser direct imaging device as shown in fig. 1.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A power control method of a laser direct imaging device is applied to the laser direct imaging device, the laser direct imaging device comprises at least one laser, and the method comprises the following steps:
dynamically collecting light spot characteristic data of each laser;
matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, wherein the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and judging whether the difference between the current output power and the preset power of each laser exceeds a preset threshold, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power and the preset power of each laser to be smaller than the preset threshold.
2. The method of claim 1, wherein the spot characterization data comprises spot brightness and/or spot area.
3. The method of claim 2, wherein the dynamically acquiring spot characteristic data of each laser comprises:
controlling a CCD camera to periodically shoot light spot images of each laser under the same external environment;
and extracting the light spot characteristic data of each laser by adopting an image recognition algorithm.
4. The method according to any of claims 1 to 3, wherein said adjusting the driving power of the corresponding laser comprises:
determining the difference grade between the current output power and the preset power of each laser;
and adjusting the driving current value of the corresponding laser according to the difference grade.
5. A laser direct imaging device power control system, comprising:
the acquisition module is used for dynamically acquiring the light spot characteristic data of each laser;
the identification module is used for matching the light spot characteristic data with a preset characteristic database to obtain the current output power of each laser, and the characteristic database stores the mapping relation between the light spot characteristic data and the output power;
and the processing module is used for judging whether the difference between the current output power of each laser and the preset power exceeds a preset threshold value or not, and if so, adjusting the driving power of the corresponding laser so as to enable the difference between the current output power of each laser and the preset power to be smaller than the preset threshold value.
6. The system of claim 5, wherein the spot characterization data comprises spot brightness and/or spot area.
7. The system of claim 6, wherein the acquisition module comprises:
the control unit is used for controlling the CCD camera to periodically shoot the light spot images of the lasers under the same external environment;
and the identification unit extracts the light spot characteristic data of each laser by adopting an image identification algorithm.
8. The system according to any one of claims 5 to 7, wherein the processing module comprises:
the first processing unit is used for determining the difference level between the current output power of each laser and the preset power;
and the second processing unit is used for adjusting the driving current value of the corresponding laser according to the difference grade.
9. A computer arrangement, characterized in that the computer arrangement comprises a processor for implementing the method according to any one of claims 1-4 when executing a computer program stored in a memory.
10. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the method of any one of claims 1 to 4.
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