CN114858817A - Detection device and method for protective lens of galvanometer - Google Patents
Detection device and method for protective lens of galvanometer Download PDFInfo
- Publication number
- CN114858817A CN114858817A CN202210437973.6A CN202210437973A CN114858817A CN 114858817 A CN114858817 A CN 114858817A CN 202210437973 A CN202210437973 A CN 202210437973A CN 114858817 A CN114858817 A CN 114858817A
- Authority
- CN
- China
- Prior art keywords
- area
- protective lens
- galvanometer
- pollution
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8854—Grading and classifying of flaws
- G01N2021/8874—Taking dimensions of defect into account
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a detection device and a detection method for a vibrating mirror protective lens, which belong to the technical field of lens detection. This application is through detection device of mirror protection lens shakes, it lights the protection lens surface through the lamp area, in order to realize that the camera is to the perfect of protection lens pollution shoot, rethread data analysis module carries out automated analysis and threshold value judgement to the image, and confirm whether to change the protection lens according to the circumstances, recycle motion actuating mechanism and transfer this mirror that shakes back to laser processing station, realize this mirror that shakes detects and laser processing's full automated inspection and switching, detection efficiency and laser processing efficiency have been improved greatly.
Description
Technical Field
The invention belongs to the technical field of lens detection, and particularly relates to a device and a method for detecting a vibrating mirror protective lens.
Background
With the continuous upgrading of welding technology, the requirements of different welding objects on welding are higher and higher, and the requirements are different. With continuous innovation of laser welding galvanometer technology, the laser welding galvanometer is widely applied to the fields of laser coding and the like due to the characteristics of high beat, high welding efficiency and the like. However, in the case of a large-size and large-diameter welding galvanometer, the protective lens is always contaminated by spatter generated during welding or dust in the environment during high-power scanning welding.
Moreover, when the protective lens of the galvanometer is polluted by splashes, dust and the like and cannot be detected in time, a large amount of laser energy can be absorbed by the pollutants attached to the protective lens. On one hand, the temperature of the protective lens can be rapidly increased under the action of high-power laser, so that the protective lens is deformed, and the service life of the protective lens is shortened; on the other hand, this causes a decrease in the laser beam energy actually used for machining the workpiece, resulting in failure to shape the weld as intended, generation of defects, and rejection of the workpiece. Under any condition, the welding cost is increased, and the economic benefit is reduced, so the pollution detection problem of the protective lens of the laser welding galvanometer is very important.
At present, the pollution detection of the protective lens in the laser welding galvanometer system is mainly carried out by manual detection by production technicians, and the technicians need to check the pollution condition of the protective lens of the galvanometer after welding is finished each time, so that on one hand, the technicians spend a lot of time on the pollution condition detection of the protective lens of the galvanometer, consuming time and labor; on the other hand, the long-time human eye detection of the technicians is difficult to ensure the recall ratio and the detection accuracy of the pollutants.
Disclosure of Invention
In view of one or more of the above drawbacks or needs for improvement in the prior art, the present invention provides a device and a method for detecting a contact lens of a galvanometer protective lens, so as to solve the problem of inaccurate surface stain detection of the contact lens of the galvanometer protective lens.
In order to achieve the above object, the present invention provides a device for detecting a protective lens of a galvanometer, which includes a galvanometer, a protective lens, a lamp strip, a camera, a data analysis module and a motion execution mechanism;
the protective lens is arranged at the light outlet of the galvanometer to form a protective structure;
the lamp strip is arranged along the circumferential direction of the protective lens and can emit light sources towards the inside of the protective lens along the direction parallel to the lens surface of the protective lens so as to form diffuse reflection in the protective lens;
the camera is arranged on one side, away from the galvanometer, of the protective lens, and a shooting port of the camera is arranged over against the lens surface of the protective lens when the protective lens is detected;
the data analysis module is in communication connection with the camera and is used for acquiring images shot by the camera and analyzing the surface pollution condition of the protective lens in the images;
the movement executing mechanism is arranged on one side of the galvanometer, which deviates from the protective lens, and is used for adjusting the position of the protective lens.
The application also comprises a detection method of the vibrating mirror protective lens, which is realized by the device for detecting the vibrating protective lens by the camera, and the specific detection steps are as follows:
s1, lighting the lamp strip, lightening the mirror surface of the protective lens, and taking pictures of the surface of the protective lens by using a camera;
s2, a data analysis module collects the images shot by the camera and calculates the gray area of single pollution and total pollution in the images;
s3, judging the pollution condition of the protective lens according to the gray area of single pollution and total pollution in the image;
if the area of the single pollution gray scale area is larger than a preset threshold of the area of the single pollution gray scale area or the area of the total pollution gray scale area is larger than a preset threshold of the area of the total pollution gray scale area, the lamp strip is closed, and the protective lens on the surface of the galvanometer is replaced;
and if the area of the single pollution gray scale region is smaller than or equal to the preset threshold of the area of the single pollution gray scale region and the area of the total pollution gray scale region is smaller than or equal to the preset threshold of the area of the total pollution gray scale region, closing the lamp strip, and using the protective lens for subsequent laser processing.
As a further improvement of the present invention, the present invention further comprises a laser processing station, wherein the motion executing mechanism is configured to switch the position of the galvanometer at the laser processing station at the camera detection galvanometer protective lens device, and the specific switching steps are as follows:
before step S1, when the laser produces the machining gap, the motion actuator drives the galvanometer to turn, so that the protective lens on the surface of the galvanometer faces the camera;
after step S3, the motion actuator turns the galvanometer so that the protective lens on the surface of the galvanometer faces the laser processing station.
As a further improvement of the present invention, in step S1, the linear distance between the protective lens and the camera is 180mm to 250 mm.
As a further improvement of the present invention, the calculation steps of the gray scale area of the individual contamination and the total contamination in step S2 are as follows:
s201, carrying out graying processing on the image to obtain gray information of the image, and counting the gray size of each pixel point in the image;
s202, calculating the weighted area of the pixel points of the gray value of the total pollution area in the image;
and S203, calculating the weighted area of the pixel points of the gray value of the single pollution area in the image.
As a further improvement of the present invention, in the step S202, the weighted area S of the pixel point of the total pollution gray value σ The calculation method is as follows:
wherein n is the number of 0 pixel points in the image, omega is the actual area of a single pixel point, and the unit is mm 2 ，σ i Is the weight of each pixel.
As a further improvement of the invention, sigma in the formula I i The calculation method is as follows:
wherein x is the gray value of the pixel point, the numerical value of tau is selected to be related to the lighting condition of the lamp strip, and the value range is 20-80.
As a further improvement of the present invention, in step S203, the weighted area SR of the pixel point of the single pollution gray value i The calculation method is as follows:
wherein m is the number of pixel points contained in each pollution, l is the number of independent pollution areas contained, and the weight sigma is k And omega is the actual area size of a single pixel point and is obtained by the formula II.
As a further improvement of the present invention, in the step S3, whether the total polluted area exceeds the total polluted area threshold value is determined as follows:
wherein S is the actual area of the protective lens, P is the laser power under the current process parameters, and P is max At maximum laser power, P min Is the minimum laser power.
As a further improvement of the present invention, in step S3, whether the area of the single polluted area exceeds the threshold of the area of the single polluted area is determined as follows:
wherein S is the actual area of the protective lens, P is the laser power under the current process parameters, and P is max At maximum laser power, P min Is the minimum laser power.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
In general, compared with the prior art, the technical scheme conceived by the invention has the following beneficial effects:
(1) according to the detection device for the vibrating mirror protective lens, the lamp strip structure is arranged on the circumference of the protective lens of the vibrating mirror, the surface brightness of the protective lens is improved through the lamp strip, the surface of the protective lens is sampled by using the camera, and the surface stain condition of the protective lens is directly judged through the data analysis module so as to judge whether the protective lens needs to be replaced. The data analysis module is used for analyzing and judging a single pollution area and an integral pollution area, and the motion execution mechanism is matched to switch the galvanometer between a laser processing station and a galvanometer protective lens detection station, so that the full-automatic detection of the protective lens is realized, and the working efficiency of laser processing cannot be influenced.
(2) According to the detection method of the vibrating mirror protective lens, the protective lens is lightened through the lamp belt structure, so that a camera can perfectly acquire the stain condition of the surface of the protective lens, and then the surface condition of the protective lens is analyzed and judged through the data analysis module so as to directly judge whether the protective lens needs to be replaced, so that the problems of judgment errors and the like caused by manual factors are avoided, complete automatic switching and judgment are integrally realized, the detection efficiency of the vibrating mirror protective lens is greatly improved, the detection time is reduced, and the laser processing efficiency is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a device for detecting a protective lens of a galvanometer in an embodiment of the invention;
fig. 2 is a schematic light path diagram of a light belt lighting protection lens in the embodiment of the present invention;
FIG. 3 is an image after graying processing of a camera shot in an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a method for inspecting a protective lens of a galvanometer lens according to an embodiment of the present disclosure;
fig. 5 is a flowchart illustrating the method for calculating the area of the pollution gray scale region in step S2 according to the embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular:
1. a galvanometer; 2. protecting the lens; 3. a light strip; 4. a camera; 5. a data analysis module; 6. and a motion executing mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
referring to fig. 1 to 5, a detection device for a protective lens of a galvanometer in a preferred embodiment of the invention includes a galvanometer 1, a protective lens 2, a lamp strip 3, a camera 4, a data analysis module 5 and a motion execution mechanism 6. The protection lens 2 is arranged right below the light outlet of the vibrating mirror 1 and used for forming a protection structure on the surface of the light outlet of the vibrating mirror 1 to prevent welding residues or dust in the environment generated in the welding process from polluting the vibrating mirror 1, and the lamp strip 3 is arranged along the circumferential direction of the protection lens 2 and can generate a light source to light the protection lens 2; the camera 4 is arranged on one side of the protective lens 2, which is far away from the galvanometer 1, and a shooting port of the camera 4 is arranged right opposite to the mirror surface of the protective lens 2 and is used for shooting the mirror surface of the protective lens 2 and recording the surface pollution condition of the protective lens; the data analysis module 5 is in communication connection with the camera 4, and is configured to receive and analyze the mirror surface information of the protective lens 2 photographed by the camera 4 to obtain a contamination condition of the surface of the protective lens 2, and finally determine whether the protective lens 2 needs to be replaced.
In traditional mirror surface testing process, adopt means such as people's eye observation, lens surface light intensity detection, all can receive other restrictions, the mode of artifical naked eye differentiation can be because the experience of operating personnel itself with judge the degree of proficiency and human fatigue degree etc. influence the degree of accuracy that 2 protection lenses of mirror 1 detected that shake, lead to the standard of judgement non-uniform, not only consuming time power, still greatly reduced laser welding efficiency. When the mode of detecting the light intensity on the surface of the lens is adopted, the light intensity of the non-shielded area on the surface of the lens and the attached areas such as dust and the like is protected from being affected basically, and an accurate conclusion cannot be obtained when the light intensity on the surface of the lens is detected. To this, this application sets up lamp area 3 structure to 2 circumference of this protection lens, and this lamp area 3 structure does not start when the mirror that shakes 1 normal work for it does not disturb the normal transmission of laser. When needing to shake mirror 1 and detect, shake 1 angle of mirror through the adjustment of motion actuating mechanism 6 for the mirror surface of protection lens 2 is just to camera 4 setting, then lights lamp area 3, and the light that sends in the lamp area 3 forms the diffuse reflection in protection lens 2, shows out with the spot on protection lens 2 surface, recycles camera 4 and carries out the record to protection lens 2 surface condition, recycles data analysis module 5 and analyzes its surface spot condition, whether needs to change in order to judge protection lens 2.
Specifically, the present application provides a detection method for detecting the protective lens 2 of the galvanometer 1 by the camera 4, and the detection method is implemented by a detection device of the protective lens of the galvanometer, and the detection method specifically includes the following steps:
s1, lighting the lamp strip 3 to lighten the mirror surface of the protective lens 2, and taking a picture of the surface of the protective lens 2 by using the camera 4;
s2, the data analysis module 5 collects the images shot by the camera 4 and calculates the gray area of single pollution and total pollution in the images;
s3, judging the pollution condition of the protective lens 2 according to the gray area of single pollution and total pollution in the image;
the area of a single pollution gray area is larger than a preset threshold of the area of the single pollution gray area or the area of a total pollution gray area is larger than a preset threshold of the area of the total pollution gray area, the lamp strip 3 is closed, the protective lens 2 is replaced, laser processing is carried out after the replacement is finished, and next detection is carried out when the laser processing gap is processed next time;
if the area of the single pollution gray scale region is smaller than or equal to the preset threshold of the area of the single pollution gray scale region and the area of the total pollution gray scale region is smaller than or equal to the preset threshold of the area of the total pollution gray scale region, the lamp strip 3 is closed, the protective lens 2 is used for subsequent laser processing, and next detection is carried out when the gap is processed by laser next time.
Further preferably, in order to improve the automation efficiency of the device of the present application, a motion actuator 6 is further disposed on one side of the galvanometer 1 away from the protective lens 2, and the motion actuator 6 is a simple three-axis mechanical arm capable of switching the galvanometer 1 between a laser processing station and a galvanometer protective lens detection station.
Specifically, at the time of production gap, the movement actuator 6 transfers the galvanometer 1 from the laser processing station to the protective lens 2 to be disposed just opposite the camera 4 for detection of the protective lens 2. After the protective lens 2 is detected or replaced, the motion actuator 6 moves the galvanometer 1 with the protective lens 2 to a laser processing station for laser processing. In the process of carrying the galvanometer 1 by the motion executing mechanism 6, because the laser processing station and the detection working position of the galvanometer protective lens are constant, the motion executing mechanism 6 does not need to adjust or judge the specific position of the galvanometer 1 by additional programs, and only needs to switch the positions according to the preset positions of the two stations.
Further, in order to ensure the shooting quality of the camera 4 on the surface of the protective lens 2, in addition to lighting the protective lens 2 through the lamp strip 3, the distance between the camera 4 and the protective lens 2 during shooting needs to be limited, so as to ensure the shooting quality. Specifically, when the camera 4 photographs the protective lens 2, the linear distance between the lens of the camera 4 and the protective lens 2 is 180mm to 250 mm. Preferably, the linear distance between the lens of the camera 4 and the protective lens 2 is 200mm or 230 mm.
Further preferably, the galvanometer 1 is a large-width and large-diameter galvanometer 1, and the scanning processing range of the galvanometer 1 can reach 180mm x 180mm at most.
Further preferably, the shape of the galvanometer 1 in the present application is square, and correspondingly, the protective lens 2 may be round or square, preferably round. Because, the circumference setting of 2 along the protective glass pieces in lamp area 3 structure utilizes 3 structures in lamp area to light the mirror surface of protective glass pieces 2, when this protective glass pieces 2 is circular, lamp area 3 can evenly light protective glass pieces 2, and the image information that camera 4 sampled this moment and obtained is more even, and visual effect is better. When the protection lens 2 is square, the light strip at four corners of the protection lens 2 is luminous and concentrated, and the brightness of the periphery and the edge area of the image information sampled by the camera 4 is concentrated, so that the visualization effect is general. Meanwhile, since the data analysis module 5 is adopted to analyze the gray scale of the image, the surface lighting of the image only affects the actual surface observation condition shot by the camera 4, and the subsequent judgment of the data analysis module 5 is not affected.
Further preferably, the protective lens 2 in the present application is a plane mirror as a whole, and the light emitted from the lamp strip 3 is emitted into the protective lens 2 in a manner of diverging all around, so that the light is diffusely reflected in the protective lens 2 to light the mirror surface of the protective lens 2. Preferably, the light emitted in the light strip 3 is one of red, violet and blue, preferably blue.
Further preferably, the data analysis module 5 in the present application specifically processes the image captured by the camera 4 as follows:
s201, carrying out graying processing on the image to obtain gray information of the image, and counting the gray size of each pixel point in the image;
preferably, the gray scale value of each pixel value in the picture is between 0 and 255.
S202, calculating the weighted areas of all pixel points with gray values in the image;
the weighted area S σ of the pixel with the gray value in the image is calculated as follows:
in the above formula one, n is the number of 0 pixels in the image, and ω is the actual area of a single pixel, and the unit is mm 2 And σ i is the weight of each pixel point.
Preferably, the weight is determined according to the degree of influence on the surface area of the protective lens 2, wherein the pixel points with large gray values have large influence on the area, and the weight is large; the pixel points with small gray values have small influence on the area and small weight, and the value is determined by the following formula:
in the second formula, x is the gray scale value of the pixel point, and the value of τ is selected to be related to the lighting condition of the lamp strip, and the selection range is 20-80, preferably 50.
S203, calculating the weighted area SRi of the pixel point of the single pollution gray value, wherein the SRi is the weighted area of the pixel point of the single pollution in the gray connected region of the part with the weight sigma larger than 0, and the specific calculation mode is as follows:
in the formula III, m is the number of pixel points contained in each pollution, l is the number of independent pollution areas contained in each pollution, the weight sigma k is obtained by the formula II, and omega is the actual area size of a single pixel point. Specifically, when a single contaminated area SRi is determined, there is a contaminated area SR formed by connecting two or more contaminated areas i . In this case, the contamination effect of the contaminated area on the surface of the protective lens needs to be treated as a contaminated area SR i Making a judgment so that the contaminated area SR i Representing a single point of contamination or a plurality of points of contamination joined togetherA contaminated area of body formation.
In the above step S3, it is determined whether the area of the single contaminated area exceeds the set threshold value of the area of the single contaminated area, and whether the area of the total contaminated area exceeds the set threshold value of the area of the total contaminated area, specifically, the following manner is determined:
in the formula IV and the formula V, S represents the actual area of the protective lens 2, P is the laser power in the current processing technological parameters, Pmax is the maximum laser power, and P is the maximum laser power mi n is the minimum laser power.
If one of the formula four or the formula five is true, the protective lens 2 is replaced, wherein the formula four is used for judging whether the total area of the polluted area exceeds the set threshold value of the total area of the polluted area; and the fifth formula is a threshold judgment of whether the area of the single pollution area exceeds the set area of the single pollution area.
When the data analysis module 5 calculates the surface pollution condition of the protective lens 2 by operating the formula, when the stain of a single area is large, the single area directly affects the processing efficiency of the laser and the protective lens 2 needs to be replaced; when the stain in a single area is small, so that the laser processing is not influenced basically, all the stained areas in the protective lens 2 need to be calculated, and whether the laser processing efficiency is influenced by the overall stain on the lens is judged.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.
Claims (10)
1. A detection device for a galvanometer protective lens is characterized by comprising a galvanometer, a protective lens, a lamp belt, a camera, a data analysis module and a motion execution mechanism;
the protective lens is arranged at the light outlet of the galvanometer to form a protective structure;
the lamp strip is arranged along the circumferential direction of the protective lens and can emit light sources towards the inside of the protective lens along the direction parallel to the lens surface of the protective lens so as to form diffuse reflection in the protective lens;
the camera is arranged on one side, away from the galvanometer, of the protective lens, and a shooting port of the camera is arranged over against the lens surface of the protective lens when the protective lens is detected;
the data analysis module is in communication connection with the camera and is used for acquiring images shot by the camera and analyzing the surface pollution condition of the protective lens in the images;
the motion executing mechanism is arranged on one side of the galvanometer, which deviates from the protective lens, and is used for adjusting the relative position of the galvanometer and the camera.
2. A method for inspecting a galvanometer protective lens, which is implemented by the apparatus for inspecting a galvanometer protective lens according to claim 1, and comprises the following steps:
s1, lighting the lamp strip, lightening the mirror surface of the protective lens, and taking pictures of the surface of the protective lens by using a camera;
s2, a data analysis module collects the images shot by the camera and calculates the gray area of single pollution and total pollution in the images;
s3, judging the pollution condition of the protective lens according to the gray area of single pollution and total pollution in the image;
if the area of the single pollution gray scale area is larger than a preset threshold of the area of the single pollution gray scale area or the area of the total pollution gray scale area is larger than a preset threshold of the area of the total pollution gray scale area, the lamp strip is closed, and the protective lens on the surface of the galvanometer is replaced;
and if the area of the single pollution gray area is less than or equal to the preset threshold of the area of the single pollution gray area and the area of the total pollution gray area is less than or equal to the preset threshold of the area of the total pollution gray area, closing the lamp belt, and using the protective lens for subsequent laser processing.
3. The method for detecting the galvanometer protective lens according to claim 2, further comprising a laser processing station, wherein the motion executing mechanism is used for switching the position of the galvanometer at the camera detection galvanometer protective lens device at the laser processing station, and the specific switching steps are as follows:
before step S1, when the laser produces the machining gap, the motion actuator drives the galvanometer to turn, so that the protective lens on the surface of the galvanometer faces the camera;
after step S3, the motion actuator turns the galvanometer so that the protective lens on the surface of the galvanometer faces the laser processing station.
4. The method for inspecting a galvanometer protective lens according to claim 2, wherein the linear distance between the protective lens and the camera in step S1 is 180mm to 250 mm.
5. The method for inspecting a galvanometer protective lens according to claim 2, wherein the step of calculating the gray scale area of the individual contamination and the total contamination in step S2 is as follows:
s201, carrying out graying processing on the image to obtain gray information of the image, and counting the gray size of each pixel point in the image;
s202, calculating the weighted area of the pixel points of the total pollution gray value in the image;
and S203, calculating the weighted area of the pixel point of the single pollution gray value in the image.
6. The method for inspecting a contact lens of claim 5, wherein the weighted area S of the pixel points of the total gray-scale contamination value in step S202 σ The calculation method is as follows:
wherein n is the number of 0 pixel points in the image, omega is the actual area of a single pixel point, and the unit is mm 2 ，σ i Is the weight of each pixel.
7. The method of inspecting a galvanometer protective lens of claim 6, wherein σ in the formula one i The calculation method is as follows:
wherein x is the gray value of the pixel point, the numerical value of tau is selected to be related to the lighting condition of the lamp strip, and the value range is 20-80.
8. The method for inspecting a contact lens of claim 7, wherein the weighted area SR of the pixel point of the single pollution gray value in step S203 i The calculation method is as follows:
wherein m is the number of pixel points contained in each pollution, l is the number of independent pollution areas contained, and the weight sigma is k And omega is the actual area size of a single pixel point and is obtained by the formula II.
9. The method for detecting a galvanometer protective lens according to claim 6, wherein the determination of whether the total contaminated area exceeds the total contaminated area threshold in step S3 is as follows:
wherein S is the actual area of the protective lens, P is the laser power under the current process parameters, and P is max At maximum laser power, P min Is the minimum laser power.
10. The method for detecting a galvanometer protective lens according to claim 7, wherein the determination of whether the area of a single contaminated area exceeds the area threshold of a single contaminated area in step S3 is as follows:
wherein S is the actual area of the protective lens, P is the laser power under the current process parameters, and P is max At maximum laser power, P min Is the minimum laser power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437973.6A CN114858817A (en) | 2022-04-25 | 2022-04-25 | Detection device and method for protective lens of galvanometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437973.6A CN114858817A (en) | 2022-04-25 | 2022-04-25 | Detection device and method for protective lens of galvanometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114858817A true CN114858817A (en) | 2022-08-05 |
Family
ID=82633983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210437973.6A Pending CN114858817A (en) | 2022-04-25 | 2022-04-25 | Detection device and method for protective lens of galvanometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114858817A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781004A (en) * | 2023-02-09 | 2023-03-14 | 广州三义激光科技有限公司 | Laser beam expanding lens protective glass protection system |
| CN116309546A (en) * | 2023-05-10 | 2023-06-23 | 宁德时代新能源科技股份有限公司 | Detection method and detection device for vibrating mirror, electronic equipment and storage medium |
-
2022
- 2022-04-25 CN CN202210437973.6A patent/CN114858817A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781004A (en) * | 2023-02-09 | 2023-03-14 | 广州三义激光科技有限公司 | Laser beam expanding lens protective glass protection system |
| CN116309546A (en) * | 2023-05-10 | 2023-06-23 | 宁德时代新能源科技股份有限公司 | Detection method and detection device for vibrating mirror, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110596131B (en) | Sheet glass edge flaw detection method based on image acquisition | |
| CN114858817A (en) | Detection device and method for protective lens of galvanometer | |
| CN109030498B (en) | Visual detection device and method for blade knife lines and surface defects | |
| US8208135B2 (en) | Method and device for the optical assessment of welding quality during welding | |
| CN110411346B (en) | Method for quickly positioning surface micro-defects of aspheric fused quartz element | |
| EP0686842A2 (en) | Lens inspection system and method | |
| CN106814083B (en) | Filter defect detection system and detection method thereof | |
| CN108593710B (en) | Thermal imaging detection system and method for surface defects of high-reflectivity material | |
| CN209992407U (en) | Large-caliber ultra-clean smooth surface defect detection device combined with linear array camera | |
| JP4901578B2 (en) | Surface inspection system and diagnostic method for inspection performance of surface inspection system | |
| KR102453258B1 (en) | Apparatus and Method for Detecting of Awafer Edge | |
| CN116609349A (en) | Carrier plate glass foreign matter detection equipment and detection method | |
| CN113432839B (en) | System and method for comprehensively testing image quality of low-light-level image intensifier | |
| CN211697564U (en) | Optical filter detection device | |
| WO2020082714A1 (en) | Laser total reflection-type 3c transparent component defect detection apparatus and method | |
| KR101937212B1 (en) | A Laser Marking Apparatus Having a Structure of Detecting a Focus Length and a Method for Adjusting the Focus Length Automatically and Detecting a Marking Defect | |
| CN113506236A (en) | Inspection device and welding device | |
| CN110907470A (en) | Optical filter detection device and optical filter detection method | |
| CN111220621A (en) | Chip inclined surface detection method | |
| JP3807201B2 (en) | Projection lens inspection sheet, projection lens inspection apparatus, and projection lens inspection method | |
| JP2012150079A (en) | Defect detection device for transparent member and defect detection method | |
| CN117871536A (en) | Large-range variable-distance measuring device for surface defect detection | |
| KR0186115B1 (en) | Noncontact bead mount inspection apparatus and its method | |
| KR20240073512A (en) | Inspection apparatus and inspection method for lead tab | |
| CN118305482A (en) | Spot welding flow machining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |