CN113134691A - Stain positioning method and device for laser cutting and laser cutting system - Google Patents
Stain positioning method and device for laser cutting and laser cutting system Download PDFInfo
- Publication number
- CN113134691A CN113134691A CN202110567777.6A CN202110567777A CN113134691A CN 113134691 A CN113134691 A CN 113134691A CN 202110567777 A CN202110567777 A CN 202110567777A CN 113134691 A CN113134691 A CN 113134691A
- Authority
- CN
- China
- Prior art keywords
- lens
- light intensity
- kth
- information
- laser
- 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
- 238000003698 laser cutting Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 230000000875 corresponding effect Effects 0.000 description 32
- 238000012545 processing Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 230000002596 correlated effect Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention provides a stain positioning method, a stain positioning device and a laser cutting system for laser cutting, wherein the method comprises the steps of acquiring actual light intensity information of N lenses when laser sequentially passes through the N lenses, wherein the actual light intensity information represents the intensity of an optical signal on the laser incidence side of the corresponding lens; aiming at any or appointed Kth lens, judging whether the Kth lens has stains or not according to K groups of actual light intensity information from the first lens to the Kth lens, wherein N is more than or equal to K and more than or equal to 2; for each lens, performing stain detection, and more accurately judging the position of the stain; meanwhile, the invention can help to eliminate or reduce the influence of the scattered laser of the previous lens on the K lens stain judgment result in the stain detection process, so that the stain detection result is more accurate.
Description
Technical Field
The invention relates to the field of laser processing, in particular to a stain positioning method and device for laser cutting and a laser cutting system.
Background
In the laser processing process, the inside from top to bottom of laser cutting head has a plurality of optical lens (6 and above), can appear because the lens pollution phenomenon that causes such as service environment, artificial maloperation or cutting head self in the use, when optical lens takes place to pollute, will lead to the bad phenomenon of laser processing to produce.
In the prior art, stain detection is mainly performed on a lower protective lens or a lens with a certain specific function, at least 6 lenses (possibly more) exist in one laser cutting head from top to bottom, wherein the two lenses at the top and the bottom are easy to be polluted, but the lens located in the middle position in the actual use process can also be polluted, and if only the easily polluted lens is detected, the position of the polluted lens cannot be accurately judged when other lenses are polluted.
Disclosure of Invention
The invention provides a stain positioning method and device for laser cutting and a laser cutting system, and aims to solve the problem of inaccurate stain positioning.
According to a first aspect of the present invention, there is provided a spot locating method for laser cutting, comprising:
when laser sequentially passes through N lenses, acquiring actual light intensity information of the N lenses, wherein the actual light intensity information represents the intensity of an optical signal at the laser incidence side of the corresponding lens;
and aiming at any or appointed Kth lens, judging whether the Kth lens has stains or not according to K groups of actual light intensity information from the first lens to the Kth lens, wherein N is more than or equal to K and is more than or equal to 2.
Optionally, for any or specified kth lens, determining whether the kth lens has a stain according to K groups of actual light intensity information from the first lens to the kth lens, including:
for the Kth lens, determining light intensity deviation information of the Kth lens according to K groups of actual light intensity information and K groups of reference light intensity information of the first lens to the Kth lens; the reference light intensity information is matched with the light intensity of the corresponding lens without stains, and the light intensity deviation information represents the deviation degree of the actual light intensity information relative to the reference light intensity information;
and judging whether the Kth lens has a stain or not according to the light intensity deviation information of the Kth lens.
Optionally, judging whether the kth lens has a stain according to the light intensity deviation information of the kth lens, includes:
and if the light intensity deviation information of the Kth lens is larger than a preset light intensity threshold value, determining that the Kth lens has stains.
Optionally, the light intensity deviation information of the kth lens is positively correlated to a ratio of the actual light intensity information of the kth lens to the reference light intensity information;
when K is more than 2, the light intensity deviation information of the Kth lens is negatively related to the sum of the light intensity deviation information of the first lens to the Kth-1 lens, and the light intensity deviation information of the first lens to the Kth-1 lens is determined according to the actual light intensity information of the first lens to the Kth-1 lens and the reference light intensity information;
when K is 2, the light intensity deviation information of the K-th lens is negatively related to the light intensity deviation information of the first lens, the light intensity deviation information of the first lens is optional and is determined according to the actual light intensity information of the first lens and the reference light intensity information, and the light intensity deviation information of the K-th lens satisfies the following formula:
wherein the content of the first and second substances,
pKrepresenting the light intensity deviation information of the Kth lens;
HKactual light intensity information of the Kth lens is represented;
hKrepresenting the reference light intensity information of the Kth lens;
pithe light intensity deviation information of the ith lens is characterized.
Optionally, when laser passes through N lenses in proper order, after obtaining the actual light intensity information of N lenses, still include:
and aiming at the first lens, judging whether the first lens has stains or not according to the actual light intensity information and the reference light intensity information of the first lens.
According to a second aspect of the present invention, there is provided a spot locating device for laser cutting, comprising:
the information acquisition module is used for acquiring actual light intensity information of the N lenses, wherein the actual light intensity information represents the intensity of an optical signal on the laser incidence side of the corresponding lens; the N lenses are sequentially distributed along the laser transmission direction;
and the stain detection module is used for judging whether stains exist on the Kth lens according to K actual light intensity information of the first lens to the Kth lens aiming at any Kth lens.
According to a third aspect of the invention, a laser cutting system is provided, which comprises a laser incidence end, a shell, a plurality of lenses, an upper computer and a photoelectric sensor, wherein laser can sequentially pass through the laser incidence end and the lenses, the lenses are fixed on the inner wall of the shell, and the laser incidence end is arranged at a first end of the shell;
the photoelectric sensor is directly or indirectly fixed on the inner wall,
the photoelectric sensor is configured to be capable of detecting an optical signal of a laser incident side of the corresponding lens;
the photoelectric sensor is directly or indirectly electrically connected with the upper computer so as to feed actual light intensity information obtained by detecting the optical signal back to the upper computer;
the upper computer is used for realizing the stain positioning method for laser cutting according to the first aspect and the optional steps of the invention.
According to a fourth aspect of the present invention, there is provided an electronic device, comprising a processor and a memory,
the memory is used for storing codes and related data;
the processor is configured to execute the codes in the memory to implement the spot locating method for laser cutting according to the first aspect of the present invention and its optional aspects.
According to a fifth aspect of the present invention, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the spot locating method for laser cutting according to the first aspect of the present invention and its alternatives.
According to the stain positioning method and device for laser cutting and the laser cutting system, when laser passes through N lenses in sequence, whether the lenses have stains can be judged based on actual light intensity information of the N lenses, compared with the situation that the lenses need to be drawn out one by one for inspection in a partial scheme, the probability of secondary pollution caused by manual operation is reduced, manual operation of the lenses is not needed, and time and labor are saved;
meanwhile, when judging whether the Kth lens has stains, the actual light intensity information of the first lens to the Kth lens is used as the judgment basis, compared with a scheme that only the actual light intensity information of the Kth lens is used as the judgment basis, the method can reflect the accumulated influence of scattered laser by using the actual light intensity information of a plurality of lenses, so that the basis is provided for eliminating the influence, and further, the method can help to eliminate or reduce the influence of the scattered laser of the previous lens on the judgment result of the stains of the Kth lens in the stain detection process, so that the stain detection result is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first schematic flow chart of a spot locating method for laser cutting according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating step S102 according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating step S1022 according to an embodiment of the present invention;
FIG. 4 is a second flowchart illustrating a spot locating method for laser cutting according to an embodiment of the present invention;
FIG. 5 is a first block diagram of a first embodiment of a spot locating apparatus for laser cutting according to the present invention;
FIG. 6 is a block diagram of the program modules of the spot detection module 202 in accordance with one embodiment of the present invention;
FIG. 7 is a second schematic view of a program module of a spot locating apparatus for laser cutting according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the structure of a laser cutting system in one embodiment of the present invention;
FIG. 9 is a schematic diagram of a partial structure of a laser cutting system in an embodiment of the present invention;
FIG. 10a is a first schematic structural diagram of a sensor fixing portion 35 according to an embodiment of the present invention;
FIG. 10b is a second schematic structural diagram of the sensor fixing portion 35 according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Description of the drawings:
31-laser incident end;
32-a housing;
33-a lens;
34-a photosensor;
35-a sensor fixation;
351-a first channel segment;
352-second channel segment;
353 — a third channel segment;
36-a lens-securing portion;
37-an upper computer.
Detailed Description
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, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those 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 technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 1, an embodiment of the present invention provides a spot positioning method for laser cutting, including:
s101: when laser sequentially passes through N lenses, acquiring actual light intensity information of the N lenses;
the actual light intensity information represents the intensity of an optical signal on the laser incidence side of the corresponding lens;
the actual light intensity information is an electric signal obtained by detecting an optical signal corresponding to the laser incidence side of the lens by the photoelectric sensor, and further the actual light intensity information can be an obtained numerical value of the electric signal of the photoelectric sensor or a light intensity value obtained by calculating according to the numerical value of the electric signal of the photoelectric sensor;
the actual light intensity information of the N lenses may be N actual light intensity information, and further, each light intensity information corresponds to one lens, so that the N actual light intensity information is obtained in step S101; at least part of the lenses may also correspond to a plurality of actual light intensity information, that is, for each lens, a plurality of photosensors are arranged to detect an optical signal at the laser incident side of the lens, and further, an average operation may be performed on the plurality of actual light intensity information of the lens having the plurality of actual light intensity information (for example, an arithmetic average of the plurality of actual light intensity information is calculated, and for example, a weighted average of the plurality of actual light intensity information is calculated), and the obtained average value is used as the actual light intensity information of the lens, then the plurality of actual light intensity information are obtained in step S101, and the number of the actual light intensity information is greater than N;
in the step S101, whether any one of the lenses has stains is determined by obtaining the actual light intensity information of the N lenses, and the stains are detected for each lens, so that compared with a partial scheme in which the stains are detected only for the lower protective glass and the lenses with specific functions, the situation that the lenses need to be drawn out one by one for inspection when the stains are located in other lenses can be avoided, the probability of secondary pollution caused by manual operation is reduced, the manual operation is not needed, and time and labor are saved;
s102: aiming at any or appointed Kth lens, judging whether the Kth lens has stains or not according to K groups of actual light intensity information from the first lens to the Kth lens;
wherein N is more than or equal to K and more than or equal to 2.
In the step S102, when determining whether the K-th lens has a stain, the actual light intensity information of the first lens to the K-th lens is considered, so that the influence of the scattered laser of the lens on other lenses is eliminated, and the stain determination is more accurate and reliable.
The first lens, kth lens, etc. above may refer to: the order of the lens in the N lenses along the laser transmission direction, the N lenses may be N lenses adjacent along the laser transmission direction.
Referring to fig. 2, in one embodiment, step S102 includes:
s1021: for the Kth lens, determining light intensity deviation information of the Kth lens according to the K groups of actual light intensity information and K groups of reference light intensity information of the first lens to the Kth lens;
the reference light intensity information is matched with the light intensity of the corresponding lens without stains, and the light intensity deviation information represents the deviation degree of the actual light intensity information relative to the reference light intensity information; the reference light intensity information is matched with the light intensity of the corresponding lens without stains, so that the light intensity represented by the reference light intensity information is equal to the light intensity of the corresponding lens without stains, and the deviation between the light intensity represented by the reference light intensity information and the light intensity of the corresponding lens without stains is within a specified deviation range, for example, the deviation is larger than the light intensity of the corresponding lens without stains or smaller than the light intensity of the corresponding lens without stains;
in a further example, the light intensity deviation information of the first K-1 lenses can be respectively calculated, and then the light intensity deviation information of the K-1 lenses is removed from the deviation value of the actual light intensity information and the reference light intensity information of the kth lens to obtain the deviation value, namely the light intensity deviation information of the kth lens;
the deviation value of the actual light intensity information and the reference light intensity information can be represented as a difference value between the actual light intensity information and the reference light intensity information, a ratio of the actual light intensity information to the reference light intensity information, and a percentage increase of the actual light intensity information relative to the reference light intensity information, so that the deviation value is not out of the protection range of the invention as long as the difference between the actual light intensity information and the reference light intensity information can be reflected no matter what way the deviation value is expressed;
s1022: and judging whether the Kth lens has a stain or not according to the light intensity deviation information of the Kth lens.
Referring to fig. 3, in one embodiment, step S1022 includes:
s10221: and if the light intensity deviation information of the Kth lens is larger than a preset light intensity threshold value, determining that the Kth lens has stains.
In step S10221, the light intensity thresholds of different lenses may be the same, for example, all of them are 0.5, or may be set to different values according to the size, shape, function, position, etc. of the corresponding lens, for example, the light intensity threshold of the first lens is 0.5, and the light intensity threshold of the fourth lens is 0.6.
In one embodiment, the light intensity deviation information of the kth lens is positively correlated to the ratio of the actual light intensity information to the reference light intensity information of the kth lens;
when K is more than 2, the light intensity deviation information of the Kth lens is negatively related to the sum of the light intensity deviation information of the first lens to the Kth-1 lens, and the light intensity deviation information of the first lens to the Kth-1 lens is determined according to the actual light intensity information of the first lens to the Kth-1 lens and the reference light intensity information;
when K is 2, the light intensity deviation information of the Kth lens is negatively related to the light intensity deviation information of the first lens, and the light intensity deviation information of the first lens is determined according to the actual light intensity information and the reference light intensity information of the first lens.
In one embodiment, the light intensity deviation information of the K-th lens satisfies the following formula:
wherein the content of the first and second substances,
pKrepresenting the light intensity deviation information of the Kth lens;
HKactual light intensity information of the Kth lens is represented;
hKrepresenting the reference light intensity information of the Kth lens;
pithe light intensity deviation information of the ith lens is characterized.
In the actual processing process, the light intensity deviation information of the Kth lens can be calculated based on the above formula, and meanwhile, the light intensity deviation information (namely p) aiming at the first lens to the K-1 th lensi) The calculated light intensity deviation information can be called, and the Kth light intensity deviation information can be calculatedThe light intensity deviation information of each lens is calculated.
Referring to fig. 4, in an embodiment, after acquiring actual light intensity information of N lenses when the laser sequentially passes through the N lenses, the method further includes:
s103: and aiming at the first lens, judging whether the first lens has stains or not according to the actual light intensity information and the reference light intensity information of the first lens.
For further example, in step S103, the light intensity deviation information of the first lens may be calculated, and the light intensity deviation information of the first lens is compared with the corresponding light intensity threshold, if the light intensity deviation information of the first lens is greater than the corresponding light intensity threshold, the first lens has a stain;
in a further example, the light intensity deviation information of the first lens satisfies the following formula:
wherein the content of the first and second substances,
p1the light intensity deviation information of the first lens is represented;
H1actual light intensity information of the first lens is represented;
h1reference light intensity information characterizing the first lens is presented.
The positive effects of the present invention are explained in detail below with reference to fig. 8:
taking the laser cutting system in fig. 8 as an example, in a general application scenario, when a stain occurs on an upper lens, scattered laser caused by the stain on the upper lens is received by a corresponding photoelectric sensor and a corresponding photoelectric sensor on the lower lens at the same time, so that a value detected by the photoelectric sensor on the lower lens is increased, a value detected by 6 photoelectric sensors in the figure is increased due to the stain on the first lens, a value detected by second to sixth photoelectric sensors is increased due to the stain on the second lens, a value detected by third to sixth photoelectric sensors is increased due to the stain on the third lens, a value detected by fourth to sixth photoelectric sensors is increased due to the stain on the fourth lens, a value detected by fifth to sixth photoelectric sensors is increased due to the stain on the fifth lens, and it is impossible to visually see whether the lens has the stain from a value detected by the photoelectric sensor corresponding to the lens;
the stain positioning method provided by the embodiment of the invention eliminates the influence of laser scattered by other lenses when judging whether stains appear on the lenses, and can more accurately judge whether stains appear on the lenses;
compared with a temperature sensor adopted in part of schemes (for example, the temperature is detected by aiming at a specific lens which is easy to pollute, when the lens is polluted, the temperature irradiated by laser can be rapidly increased), actual light intensity information obtained by adopting the photoelectric sensor is not easily influenced by stray laser in the shell, so that the situation of inaccurate measurement is caused, and the factors influencing the measurement result are fewer; compared with image acquisition of the lens (for example, an industrial camera detects pollution of a specific lens) in a part of schemes, the cost of the photoelectric sensor is low, the occupied space is small, great difficulty cannot be caused to the overall design of the laser head, the uploading data volume is small, and analysis and processing are facilitated.
Referring to fig. 5, an embodiment of the present invention further provides a spot positioning apparatus 2 for laser cutting, including:
the information acquisition module 201 is configured to acquire actual light intensity information of the N lenses when the laser sequentially passes through the N lenses, where the actual light intensity information represents intensity of an optical signal on a laser incident side of the corresponding lens;
the spot detection module 202 is configured to, for any or specified kth lens, determine whether the kth lens has a spot according to K sets of actual light intensity information from the first lens to the kth lens.
Referring to fig. 6, in one embodiment, the stain detection module 202 includes:
a deviation determining unit 2021, configured to determine, for the K-th lens, light intensity deviation information of the K-th lens according to the K sets of actual light intensity information and K sets of reference light intensity information of the first lens to the K-th lens;
the reference light intensity information is matched with the light intensity of the corresponding lens without stains, and the light intensity deviation information represents the deviation degree of the actual light intensity information relative to the reference light intensity information;
a stain judging unit 2022, configured to judge whether the kth lens has a stain according to the light intensity deviation information of the kth lens.
In one embodiment, the stain determination unit 2022 is specifically configured to:
and if the light intensity deviation information of the Kth lens is larger than a preset light intensity threshold value, determining that the Kth lens has stains.
In one embodiment, the light intensity deviation information of the kth lens is positively correlated to the ratio of the actual light intensity information to the reference light intensity information of the kth lens;
when K is more than 2, the light intensity deviation information of the Kth lens is negatively related to the sum of the light intensity deviation information of the first lens to the Kth-1 lens, and the light intensity deviation information of the first lens to the Kth-1 lens is determined according to the actual light intensity information of the first lens to the Kth-1 lens and the reference light intensity information;
when K is 2, the light intensity deviation information of the Kth lens is negatively related to the light intensity deviation information of the first lens, and the light intensity deviation information of the first lens is determined according to the actual light intensity information and the reference light intensity information of the first lens.
In one embodiment, the light intensity deviation information of the K-th lens satisfies the following formula:
wherein the content of the first and second substances,
pKrepresenting the light intensity deviation information of the Kth lens;
HKactual light intensity information of the Kth lens is represented;
hKrepresenting the reference light intensity information of the Kth lens;
pithe light intensity deviation information of the ith lens is characterized.
Referring to fig. 7, in one embodiment, the spot positioning apparatus 2 for laser cutting further includes:
the first lens judging module 203 is configured to judge, for the first lens, whether the first lens has a stain according to the actual light intensity information and the reference light intensity information of the first lens.
Referring to fig. 8, an embodiment of the present invention further provides a laser cutting system, including a laser incident end 31, a housing 32, a plurality of lenses 33, an upper computer 37, and a photoelectric sensor 34, where laser can sequentially pass through the laser incident end 31 and the plurality of lenses 33, the lenses 33 are fixed on an inner wall of the housing 32, and the laser incident end 31 is disposed at a first end of the housing 32; the number of the plurality of lenses can be larger than N or equal to N;
the photoelectric sensors 34 are directly or indirectly fixed on the inner wall, such as the laser cutting system in fig. 8, the photoelectric sensors 34 may be located above the corresponding lenses, and the distance between each photoelectric sensor 34 and the corresponding lens in the y-axis direction may be different, specifically, an appropriate distance and angle may be selected according to the size, shape and corresponding function of the corresponding lens, so that the photoelectric sensors can detect more accurate optical signals of the corresponding lens;
the photosensor 34 is configured to be able to detect an optical signal of the laser incident side of the corresponding lens; the photoelectric sensor 34 is directly or indirectly electrically connected with the upper computer 37 so as to feed back actual light intensity information obtained by detecting the optical signal to the upper computer 37;
the upper computer 37 is used for implementing the spot positioning method for laser cutting described above.
The housing 32 may be cylindrical, and the lens 33 and the photoelectric sensor 34 are disposed inside the cylindrical housing 32; the housing 32 may be prism-shaped, and the lens 33 and the photoelectric sensor 34 are disposed inside the prism-shaped housing 32;
in one example, the laser incident end 31 and the plurality of lenses 33 are sequentially distributed along a straight line, wherein the straight line may be distributed along a straight line in a vertical direction, for example; the linear directions can also be distributed along the linear direction of the horizontal direction; the linear directions can also be distributed, for example, along oblique linear directions; in addition, the pitch angle of the device may be changed in motion, and further, the linear direction may also be changed in motion, and it can be seen that the linear direction may be arbitrarily configured and changed according to different requirements, and is not limited to the above examples.
In another example, the laser incident end 31 and the N mirrors 33 may not be distributed along a straight line, for example, a line connecting centers of the N mirrors may be two or more intersecting straight lines (for example, it can be realized by using a large-angle refractive and reflective mirror).
In one embodiment, the number of the photo sensors 34 is N, and the N photo sensors correspond to the N lenses one by one.
In one example, the photoelectric sensor is connected with the upper computer through an AD chip, analog actual detection information detected by the photoelectric sensor is digital actual detection information obtained after analog-to-digital conversion through the AD chip, the upper computer 21 calculates actual light intensity information reflected to the photoelectric sensor by the corresponding lens according to the received digital actual detection information, and then executes the method related to the above to judge whether stains appear on the lens.
Referring to fig. 9, a partial schematic view of a laser cutting system is shown, in which a photoelectric sensor 34 is fixed on the inner wall of a housing 32 through a sensor fixing portion to detect an optical signal corresponding to the laser incident side of a lens, wherein a plurality of rays are shown as the path of laser light reflected or refracted by a stain when the central position of the lens 33 appears, and a sensor channel is formed in a sensor fixing portion 35, in which the photoelectric sensor is fixed; the photoelectric sensor is arranged at the first end of the sensor channel, and a rear end connecting line of the photoelectric sensor penetrates out of the second end of the sensor channel 35 and is electrically connected to the upper computer 37;
by way of further example, the sensor fixing portion 35 may be a hollow tubular structure, such as a circular tube, a square tube, etc., and the sensor channel is a tube interior of the tubular structure;
in another example, the sensor fixing portion 35 may be provided with a groove portion, and the sensor channel may be the groove portion of the sensor fixing portion 35;
in still another example, the sensor fixing portion 35 may be formed of an Contraband-shaped composite structure formed by combining a plurality of sheet-like structures, and the sensor channel is a groove portion formed by combining a plurality of Contraband-shaped structures.
Referring to fig. 10a and 10b, in an example, the sensor fixing portion 35 is shown in the figure, and the sensor channel includes: a first channel segment 351 (e.g., a sensor channel on the left of the dotted line a in fig. 10) for accommodating the photosensor, and a second channel segment 352 (e.g., a sensor channel between the dotted lines a and B in fig. 10) for passing a rear end wiring of the photosensor, wherein the first channel segment 351 and the second channel segment 352 are connected in sequence;
the sensor may be fixed at an end of the first channel segment 351 near the second channel segment 352, and the second channel segment 352 is only traversed by the back end wiring of the photosensor.
Taking a plane perpendicular to the channel extending direction of the sensor channel as a projection plane, then: the projection pattern of the first channel segment 161, the second channel segment 162 and the photoelectric sensor 15 on the projection plane satisfies:
the projected pattern of the first channel segment 161 matches the projected pattern of the photosensor 15, and a part of the projected pattern of the first channel segment 161 coincides with a part or all of the projected pattern of the second channel segment 162. In a further example, the projected pattern of the first channel segment 161 may overlap but not coincide with the projected pattern of the second channel segment 162.
If the projected patterns of the first channel segment 351 and the second channel segment 352 are circular, the diameter of the first channel segment 351 is matched with that of the photoelectric sensor, so that the photoelectric sensor can be fixedly installed on the first channel segment, and the diameter of the second channel segment 352 can be larger than or equal to that of the rear end connecting line of the sensor; and d1 > d 2.
If the projected patterns of the first channel segment 351 and the second channel segment 352 are rectangular, at least one side length (e.g., side length d1) of the first channel segment 351 is matched with the photosensor, so that the photosensor can be fixedly mounted on the first channel segment, and the corresponding side length (e.g., side length d2 parallel to side length d1) of the second channel segment 352 is greater than or equal to the diameter of the rear end connecting line of the sensor.
In one example, the lens is fixed on the inner wall of the housing 32 through the lens fixing portion 36, and the lens fixing portions of different lenses can adopt different sizes or structures according to the size, shape, function, etc. of the corresponding lens, so as to better fix the corresponding lens, so that the lens can be more firmly fixed, thereby avoiding the problems of looseness, etc. of the lens, affecting the transmission of laser, and affecting the quality of laser processing due to the position of the laser focus when laser processing is performed.
In a further example, the sensor channel further includes a third channel segment 353 (for example, the sensor channel on the right of the dashed line B in fig. 10), the third channel segment 353 is disposed at the second end of the sensor fixing portion 35, the third channel segment 353 is connected to an end of the second channel segment 352 away from the first channel end 351, and an inlet of the third channel segment 353 may be larger than an inlet of the second channel segment 352;
the entrance of the third channel section 353 is larger than the entrance of the second channel section 352, and it can be understood that, taking a plane perpendicular to the channel extending direction of the sensor channel as a projection plane, the projection pattern of the third channel section 163 may cover but not coincide with the projection pattern of the second channel section 162;
the area of the projected pattern of the third channel segment 353 is larger than the area of the projected pattern of the second channel segment 352.
In some examples, the N lenses, the housing, the photoelectric sensor and the nozzle connected to the housing and far from the laser incident end form a laser cutting head of the laser cutting system, the lenses and the photoelectric sensor are arranged inside the laser cutting head and fixedly connected to the inner wall of the housing, and the laser cutting head can be directly or indirectly connected to an upper computer through a control component and can be controlled by the upper computer to perform laser cutting;
in some examples, the laser cutting system may further include a laser generator, a laser outlet of the laser generator is directly or indirectly connected to the laser incident end, the laser generator is electrically connected to an upper computer, and the upper computer may control energy, time, and the like of laser generated by the laser generator;
in some examples, the lens can be electrically connected with an upper computer through the lens control part, and then the upper computer can adjust the angle and the position of the lens through the lens control part, so as to adjust the focus of the processing laser and control the quality of the laser processing.
Referring to fig. 11, an electronic device 40 is provided, including:
a processor 41; and the number of the first and second groups,
a memory 42 for storing executable instructions of the processor;
wherein the processor 41 is configured to perform the above-mentioned method via execution of the executable instructions.
The processor 41 is capable of communicating with the memory 42 via the bus 43.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the above-mentioned method.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A spot locating method for laser cutting, comprising:
when laser sequentially passes through N lenses, acquiring actual light intensity information of the N lenses, wherein the actual light intensity information represents the intensity of an optical signal at the laser incidence side of the corresponding lens;
and aiming at any or appointed Kth lens, judging whether the Kth lens has stains or not according to K groups of actual light intensity information from the first lens to the Kth lens, wherein N is more than or equal to K and is more than or equal to 2.
2. The spot positioning method for laser cutting according to claim 1, wherein for any or specified Kth lens, judging whether the Kth lens has a spot according to K groups of actual light intensity information from the first lens to the Kth lens comprises:
for the Kth lens, determining light intensity deviation information of the Kth lens according to K groups of actual light intensity information and K groups of reference light intensity information of the first lens to the Kth lens; the reference light intensity information is matched with the light intensity of the corresponding lens without stains, and the light intensity deviation information represents the deviation degree of the actual light intensity information relative to the reference light intensity information;
and judging whether the Kth lens has a stain or not according to the light intensity deviation information of the Kth lens.
3. The spot positioning method for laser cutting according to claim 2, wherein the step of determining whether the K-th lens has a spot according to the light intensity deviation information of the K-th lens comprises:
and if the light intensity deviation information of the Kth lens is larger than a preset light intensity threshold value, determining that the Kth lens has stains.
4. The spot positioning method for laser cutting according to claim 2, wherein the light intensity deviation information of the kth lens positively correlates to a ratio of the actual light intensity information to the reference light intensity information of the kth lens;
when K is more than 2, the light intensity deviation information of the Kth lens is negatively related to the sum of the light intensity deviation information of the first lens to the Kth-1 lens, and the light intensity deviation information of the first lens to the Kth-1 lens is determined according to the actual light intensity information of the first lens to the Kth-1 lens and the reference light intensity information;
when K is 2, the light intensity deviation information of the Kth lens is negatively related to the light intensity deviation information of the first lens, and the light intensity deviation information of the first lens is determined according to the actual light intensity information and the reference light intensity information of the first lens.
5. The spot locating method for laser cutting according to claim 4, wherein the light intensity deviation information of the Kth lens satisfies the following formula:
wherein the content of the first and second substances,
pKrepresenting the light intensity deviation information of the Kth lens;
HKactual light intensity information of the Kth lens is represented;
hKrepresenting the reference light intensity information of the Kth lens;
pithe light intensity deviation information of the ith lens is characterized.
6. The spot positioning method for laser cutting according to claim 1, wherein after acquiring the actual light intensity information of the N lenses when the laser sequentially passes through the N lenses, the method further comprises:
and aiming at the first lens, judging whether the first lens has stains or not according to the actual light intensity information and the reference light intensity information of the first lens.
7. A spot locating device for laser cutting, comprising:
the information acquisition module is used for acquiring actual light intensity information of the N lenses, wherein the actual light intensity information represents the intensity of an optical signal on the laser incidence side of the corresponding lens; the N lenses are sequentially distributed along the laser transmission direction;
and the stain detection module is used for judging whether stains exist on the Kth lens according to K actual light intensity information of the first lens to the Kth lens aiming at any Kth lens.
8. A laser cutting system is characterized by comprising a laser incidence end, a shell, a plurality of lenses, an upper computer and a photoelectric sensor, wherein laser can sequentially pass through the laser incidence end and the lenses, the lenses are fixed on the inner wall of the shell, and the laser incidence end is arranged at a first end of the shell;
the photoelectric sensor is directly or indirectly fixed on the inner wall,
the photoelectric sensor is configured to be capable of detecting an optical signal of a laser incident side of the corresponding lens;
the photoelectric sensor is directly or indirectly electrically connected with the upper computer so as to feed actual light intensity information obtained by detecting the optical signal back to the upper computer;
the upper computer is used for realizing the stain positioning method for the laser cutting in any one of claims 1 to 6.
9. An electronic device, comprising a processor and a memory,
the memory is used for storing codes and related data;
the processor is configured to execute the codes in the memory to implement the spot locating method for laser cutting of any one of claims 1 to 6.
10. A storage medium having stored thereon a computer program which, when executed by a processor, implements the spot locating method for laser cutting of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110567777.6A CN113134691A (en) | 2021-05-24 | 2021-05-24 | Stain positioning method and device for laser cutting and laser cutting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110567777.6A CN113134691A (en) | 2021-05-24 | 2021-05-24 | Stain positioning method and device for laser cutting and laser cutting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113134691A true CN113134691A (en) | 2021-07-20 |
Family
ID=76818069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110567777.6A Pending CN113134691A (en) | 2021-05-24 | 2021-05-24 | Stain positioning method and device for laser cutting and laser cutting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113134691A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390885A (en) * | 2021-08-17 | 2021-09-14 | 济南邦德激光股份有限公司 | Laser head cutting protective glass state detection device and detection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623718A (en) * | 2003-12-02 | 2005-06-08 | 富士通株式会社 | Method for controlling laser beam machine and laser beam machine |
| CN102507596A (en) * | 2011-11-18 | 2012-06-20 | 中国工程物理研究院激光聚变研究中心 | Optical element surface defect detecting system based on active laser beam scanning |
| CN103245286A (en) * | 2012-02-09 | 2013-08-14 | 中国科学院西安光学精密机械研究所 | Method and device for testing position of dust on surface of optical element |
| CN105699396A (en) * | 2016-03-29 | 2016-06-22 | 同高先进制造科技（太仓）有限公司 | Pollution detection device and method of welding laser head protective glasses based on light scanning |
| CN105772961A (en) * | 2016-03-29 | 2016-07-20 | 同高先进制造科技（太仓）有限公司 | Laser head protection lens pollution monitoring device based on scattered light detection and working method thereof |
| WO2019054964A2 (en) * | 2016-12-22 | 2019-03-21 | Ermaksan Makina Sanayi Ve Ticaret Anonim Sirketi | Laser cutting system and method providing focusing onto processed material at laser cutting machines |
| CN112276346A (en) * | 2020-10-22 | 2021-01-29 | 温州大学 | Automatic accurate focusing processing head of super high power laser cutting |
-
2021
- 2021-05-24 CN CN202110567777.6A patent/CN113134691A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623718A (en) * | 2003-12-02 | 2005-06-08 | 富士通株式会社 | Method for controlling laser beam machine and laser beam machine |
| CN102507596A (en) * | 2011-11-18 | 2012-06-20 | 中国工程物理研究院激光聚变研究中心 | Optical element surface defect detecting system based on active laser beam scanning |
| CN103245286A (en) * | 2012-02-09 | 2013-08-14 | 中国科学院西安光学精密机械研究所 | Method and device for testing position of dust on surface of optical element |
| CN105699396A (en) * | 2016-03-29 | 2016-06-22 | 同高先进制造科技（太仓）有限公司 | Pollution detection device and method of welding laser head protective glasses based on light scanning |
| CN105772961A (en) * | 2016-03-29 | 2016-07-20 | 同高先进制造科技（太仓）有限公司 | Laser head protection lens pollution monitoring device based on scattered light detection and working method thereof |
| WO2019054964A2 (en) * | 2016-12-22 | 2019-03-21 | Ermaksan Makina Sanayi Ve Ticaret Anonim Sirketi | Laser cutting system and method providing focusing onto processed material at laser cutting machines |
| CN112276346A (en) * | 2020-10-22 | 2021-01-29 | 温州大学 | Automatic accurate focusing processing head of super high power laser cutting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113390885A (en) * | 2021-08-17 | 2021-09-14 | 济南邦德激光股份有限公司 | Laser head cutting protective glass state detection device and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8039786B2 (en) | Absolute position encoder obtains signals corresponding to individual imaging ranges of imaging optical systems | |
| JP6046929B2 (en) | Optical measuring device | |
| KR101119876B1 (en) | System for providing position of beam's axis and method for measuring displacement thereof | |
| CN104049437A (en) | Lens apparatus and a camera system | |
| CN113134691A (en) | Stain positioning method and device for laser cutting and laser cutting system | |
| CN101576372A (en) | Automatic detection device for size of used position of surgical instrument and detection method thereof | |
| CN116358417A (en) | Device and method for judging object edge position through Fresnel diffraction principle | |
| JPH026720A (en) | Focus adjustor for optical detector and method thereof | |
| KR101009598B1 (en) | Edge detection apparatus | |
| JPH04319615A (en) | Optical height measuring apparatus | |
| KR20170105295A (en) | Apparatus for measuring distance | |
| CN101424568A (en) | Light measuring device and scanning optical system | |
| CN111829443A (en) | Optical fiber spacing measuring system and measuring method thereof | |
| CN115461643A (en) | Illumination pattern for object depth measurement | |
| TWI472712B (en) | Vertical and parallelism detection system and its detection method | |
| WO2006129494A1 (en) | Method and device for measuring structure of parent material for optical fiber | |
| CN102736795B (en) | Optical touch screen system | |
| TWI436254B (en) | Optical touch display system | |
| CN107193428B (en) | Optical touch screen, touch positioning method thereof and optical distortion calibration method | |
| JP2006284495A (en) | Method and instrument for measuring refractive index dispersion of transparent object | |
| CN207832425U (en) | Lens detecting device | |
| RU2791144C1 (en) | Method for measuring and control of slot gaps of sand filters and inspection machine for its implementation (options) | |
| JP5808194B2 (en) | Shape measuring method, shape measuring apparatus, program, and recording medium | |
| WO2020211918A1 (en) | A method for defining an outline of an object | |
| JP2003255217A (en) | Focusing method and focusing device |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210720 |