CN111351805A - Light source module, online float glass defect detection device and detection method thereof - Google Patents
Light source module, online float glass defect detection device and detection method thereof Download PDFInfo
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- G01N21/88—Investigating the presence of flaws or contamination
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Abstract
The invention discloses a light source module, a float glass online defect detection device and a detection method thereof, wherein the light source module comprises: a transmissive light source sub-module comprising: stripe light source, core light source and beam split subassembly, the beam split subassembly includes: a beam splitter and a first convex lens; the plane of the first convex lens faces the spectroscope and forms an angle of 45 degrees with the spectroscope; the fringe light source is arranged on one side of the spectroscope, which is far away from the first convex lens, and the projection direction of the fringe light source is vertical to the plane of the first convex lens; the core light source is arranged on one side, facing the first convex lens, of the spectroscope, the projection direction of the core light source is parallel to the plane of the first convex lens, the distance between the core light source and the plane of the first convex lens is from far to near, and the core light source comprises multiple rows which are sequentially arranged in parallel. The invention can simultaneously realize the on-line high-precision conventional defect detection and the measurement of the weak deformation defects such as the high-precision glass ribs and the like.
Description
Technical Field
The invention belongs to the technical field of machine vision, and particularly relates to a light source module, a float glass online defect detection device and a detection method thereof.
Background
The float glass is produced in a tin bath into which protective gas (N2 and H2) is introduced. The molten glass flows into the tank furnace continuously and floats on the surface of molten tin with relatively high density, and under the action of gravity and surface tension, the molten glass is spread on the surface of molten tin, flattened to form flat upper and lower surfaces, hardened, cooled and then introduced to a transition roller table. The rollers of the roller table rotate to pull the glass strip out of the tin bath and enter an annealing kiln, and the float glass product is obtained after annealing and cutting. Compared with other forming methods, the float method has the advantages that: is suitable for efficiently manufacturing high-quality plate glass, such as uniform thickness, flat upper and lower surfaces and parallel to each other; the scale of the production line is not limited by a forming method, and the energy consumption of unit products is low; the utilization rate of the finished product is high; scientific management is easy, full-line mechanization and automation are realized, and the labor productivity is high; the continuous operation period can be as long as several years, which is beneficial to stable production; can provide suitable conditions for producing some new varieties on line, such as electro-float reflecting glass, film-coated glass during annealing, cold end surface treatment and the like.
Under the influence of the production process, the float glass has conventional defects such as bubbles, stones, inclusions, scratches and the like, and also has very tiny optical defects such as optical deformation, glass ribs and the like. Optical distortion refers to the degree of distortion of an object caused by the unevenness of the glass surface and the internal refractive index unevenness when a person views the object through the glass. The glass ribs, which are glass rib stripes, are substances which can be seen in glass production but are not expected to appear and have similar properties to glass, are stripes which are buried in different depths, are mostly irregular in shape and have no clear boundary, are mainly caused by insufficient mechanical flow process and physical-chemical dissolution process, and can also be understood as stripes formed in a transition stage before melt is uniform through mutual permeation in the aspects of chemistry, physics and structure. In order to continuously improve the process level, improve the product yield and improve the customer satisfaction, the two defects are detected efficiently and accurately on line by adopting a proper method.
At present, the existing online defect detection equipment can well detect conventional defects, but has no effect on very tiny optical deformation such as optical deformation and glass ribs, and part of the equipment can detect the defects such as the glass ribs, but has poor detection precision and poor practical application effect. The solution is mainly that the detection measurement of the conventional defects and the detection measurement of the optical defects such as the micro deformation and the like are carried out separately, wherein the micro deformation, particularly the glass rib, is mainly measured off-line by using a zebra instrument, and the on-line detector cannot accurately measure the deformation of the glass rib.
The Chinese invention patent 'a glass defect detection method, a system and a device' (application number: 201910875092.0 application date: 2019.09.07) 'a glass defect detection method' (application number: 201710957604.9 application date: 2017.10.13) 'and the Chinese invention patent' a glass defect detection device '(application number: 201721263407.9 application date: 2017.09.28)' are defect online detection equipment, and can detect simple bubble and stone defects but cannot detect defects such as tiny deformation or glass ribs.
The glass defect detection device (application No. 201820702486.7 application date: 2018.05.11), the glass defect detection device (application No. 201821048756.3 application date: 2018.07.03), the glass defect detection device (application No. 201721247288.8 application date: 2017.09.27), the glass defect detection device (application No. 201720562248.6 application date: 2017.05.19) and the glass defect detection method (application No. 201710174896.9 application date: 2017.03.22) are all offline measurement devices and cannot detect micro deformation or glass ribs.
The device and the method of the Chinese invention patent 'a device for detecting optical deformation zebra crossing angle of glass' (application number: CN201821647687.8 application date: 2019.06.07), the Chinese invention patent 'a glass zebra crossing angle measuring device' (application number: CN201420621944.6 application date: 2014.10.24) and the Chinese invention patent 'an automatic measuring device for optical deformation of flat glass' (application number: CN200420006927.8 application date: 2004.03.10) can measure the tiny deformation of glass ribs and the like, but can not measure the defects of the glass, and are all in an off-line measuring mode.
Patent document No. 201410259639.1 discloses an on-line detection method for float glass, which detects the change rate of luminous flux in unit period of moire fringes to measure the zebra angle of the glass on line, but the defect detection measurement mainly depends on algorithm to calculate, which not only increases the burden of software calculation, but also brings errors.
In summary, the existing glass online detection equipment can meet a certain requirement of detection of bubbles and stones with conventional defects or measurement of micro deformation such as glass ribs and the like, and both requirements cannot be considered simultaneously; the defect information of a plurality of angles cannot be provided, so that the identification and classification of the defects are inaccurate, and even a large number of missed detection and false detection situations occur.
Disclosure of Invention
The invention mainly aims to provide a light source module, a float glass online defect detection device and a detection method thereof, and aims to solve the problem that the conventional glass online defect detection device cannot detect conventional defects, glass ribs and other micro deformations of glass.
To achieve the above object, the present invention provides a light source module, including: a transmissive light source sub-module (1) comprising: stripe light source, core light source and beam split subassembly, the beam split subassembly includes: a beam splitter and a first convex lens; the first convex lens and the spectroscope form an angle of 45 degrees; the fringe light source is arranged on one side of the spectroscope, which is far away from the first convex lens, the projection direction of the fringe light source is perpendicular to the first convex lens, and grating fringes are projected to the glass to be measured through the first convex lens after light of the fringe light source penetrates through the spectroscope; the core light source is arranged on one side, facing the first convex lens, of the spectroscope, the projection direction of the core light source is parallel to the first convex lens, and the core light source is projected to the glass to be measured through the first convex lens after being reflected by the spectroscope.
Preferably, along the distance first convex lens from far to near's direction, the core light source is including the multirow that sets up side by side in proper order, the multirow the core light source warp after the spectroscope reflection, to first convex lens throws, through first convex lens forms multi-angle transmission light source.
Preferably, the light source module further includes: the reflection submodule is arranged on one side, deviating from the transmission light source submodule, of the glass to be tested, and comprises: the projection direction of the reflection light source is perpendicular to the second convex lens, and light projected by the reflection light source passes through the second convex lens and is projected to the glass to be measured.
Preferably, the reflection light source comprises a plurality of rows arranged in parallel, and the light rays projected by the plurality of rows of reflection light sources form a multi-angle reflection light source through the second convex lens.
Preferably, the arrangement direction of the plurality of rows of core light sources is perpendicular to the arrangement direction of the plurality of rows of reflective light sources.
Preferably, the stripe light source includes: the light source comprises a first light source and a striped film, wherein the striped film is arranged between the first light source and the spectroscope.
The invention also provides an online defect detection device for float glass, which comprises: the device comprises a light source module, an imaging module and an image analysis module, wherein the light source module is any one of the light source modules.
Preferably, the imaging module comprises: the system comprises an ultra-high-definition high-speed linear array camera and a high-resolution low-distortion lens, wherein the ultra-high-definition high-speed linear array camera is used for collecting glass images; the image analysis module includes: the front-end processing module consists of a processor and a switch, the processor is in communication connection with the imaging module, and the front-end processing module is used for processing the image shot by the imaging module and then transmitting the data to the data terminal; the data terminal is used for carrying out defect analysis calculation on the data transmitted by the front-end processing module and putting and displaying the calculation result data on the display; the imaging module is further mounted with: a cooling module to cool the imaging module.
The invention also provides a detection method of the float glass online defect detection device, and the image analysis module comprises: the detection method comprises the following steps:
s1, the front end processing module controls the light source module, lights the LED light source in turn, including: the system comprises a stripe light source (12) and a core light source (13), wherein a single-row LED light source or multiple-row LED light sources which are on at the same time are light fields, different light fields are on at different times, an imaging module (3) is focused on glass (4) to be detected, and synchronous light sources are used for sequentially acquiring images, so that each position has a corresponding image on each light field;
s2, the imaging module (3) sends the collected images of different light fields to a front-end processing module, the front-end processing module identifies the pictures of different light fields, pre-processes the pictures, finds out defects through calculation, and sends the multi-light-field images of the defects to a data terminal;
and S3, the data terminal analyzes and calculates the defect multi-light-field image given by the front-end processing module, then classifies the defects, and simultaneously labels the defect information, wherein the obtained defect information comprises the zebra corner.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
in the online detection device for float glass, the light source module comprises a transmission light source submodule which comprises a stripe light source and a core light source, grating stripes can be transmitted to glass to be detected through the stripe light source, the virtual moire fringe technology can be used for detecting and calculating micro deformation of glass ribs and the like, after the core light source is added on the stripe light source, the conventional defects are more obvious and easier to identify in a defect image shot by a camera, and an image analysis module can conveniently analyze and calculate the size, position and other information of the conventional defects.
Secondly, the core light source can form a multi-angle light source, and further can form the multi-angle light source in the reflection light source submodule, so that the image acquisition of the same defect in different illumination environments can be realized, the acquisition quantity of the information of the defect is greatly improved, the classification and identification effects of the defect are obviously improved, and the accuracy and the detection efficiency of the detection result are improved.
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, 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 the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram of an online defect detecting apparatus for float glass according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a light source module and an imaging module in the online defect detecting apparatus for float glass proposed in FIG. 1;
FIG. 3 is a schematic structural diagram of a transmission light source submodule in the online float glass defect detecting device of FIG. 1;
FIG. 4 is a schematic diagram of a basic principle of a multi-angle light source formed by convex lenses;
FIG. 5 is a striped picture formed on glass by a striped light source;
FIG. 6 is a photograph of the fringes when there is a slight distortion on the glass being measured;
FIG. 7 is a conventional defect picture actually collected under illumination of a conventional fringe light source;
FIG. 8 is a conventional defect picture actually acquired by a camera under illumination of a core light source using the detection apparatus of the present invention;
FIG. 9 is a photograph of a conventional defect taken by a camera with only a striped light source;
FIG. 10 is a photograph of a conventional defect taken by a camera with a striped light source plus an angled core light source;
FIG. 11 is a picture of a conventional defect taken by a camera with a striped light source plus another angled core light source.
The invention is illustrated by the reference numerals:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Transmission |
11 | |
| 111 | |
12 | |
| 121 | |
122 | |
| 13 | |
14 | |
| 15 | First |
2 | |
| 21 | |
211 | |
| 22 | |
23 | Second |
| 3 | |
4 | Glass to be measured |
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; 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 addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a light source module for providing grating stripes to carry out glass defect detection and a float glass online defect detection device.
Referring to fig. 1 to 11, the present invention provides an online defect detecting device for float glass, including: light source module, imaging module and image analysis module, light source module includes: the device comprises a transmission light source submodule 1 and a reflection light source submodule 2, wherein the light source submodule is used for providing grating stripes to carry out glass defect detection. The imaging module 3 is used for acquiring an appearance image of the glass 4 to be detected, and the image analysis module is used for performing defect analysis on the appearance image of the glass to be detected.
The transmission light source submodule 1 includes: the light source device comprises a first shell 11, and a stripe light source 12, a core light source 13 and a light splitting component which are arranged in the first shell 11. One side of the first casing 11 is provided with a first window 111 for emitting light, and the first window 111 faces the glass 4 to be measured. A striped light source 12 comprising: the first light source 121 and the stripe film 122, the stripe light source 12 is disposed at the bottom of the first housing 11, and the distance from the stripe film 122 to the first light source 121 satisfies the talbot distance, so that the light emitted by the first light source 121 is converted into clear stripe light with light and dark stripe characteristics through the stripe film 122. The core light source 13 is disposed on a side wall of the first housing 11 and is a plurality of LED light sources arranged side by side. A light splitting assembly comprising: spectroscope 14 and first convex lens 15, spectroscope 14 are 45 degrees contained angles and set up in first casing 11, and first convex lens 15 is a plano-convex lens, and first convex lens 15 is close to first window 111 and sets up, and the plane of first convex lens 15 is 45 degrees angles with spectroscope 14. Preferably, the ratio of the transmittance to the reflectance of the spectroscope 14 is 1: 1.
Thereby enabling the user to make a decision,
first, light of the fringe light source 12 is transmitted out through the beam splitter 14, the transmitted light irradiates the first convex lens 15, the first convex lens 15 deflects the fringe light very little, and it can be considered that no fringe light is deflected, and the fringe light source 12 projects grating fringes to the glass to be measured through the first convex lens 15.
The light reflected by the light splitter 14 from the core light source 13 is also perpendicular to the plane of the first convex lens 15, the light reflected by the rows of core light sources 13 is irradiated onto the first convex lens 15 in parallel and is irradiated out by the first convex lens 15, and the first convex lens 15 performs angular deflection on the rows of reflected light by utilizing the deflection characteristic of the light.
Here, first, the basic principle of the convex lens changing the angle of light rays is described:
the light of each different angle is on same object, and the shadow that the object produced is different, and the difference between different angles is bigger, and the light shadow effect difference is bigger, consequently utilizes different effect graphs can detect the defect of different grade type. Referring to the schematic diagram shown in fig. 4, compared with the right light ray without the convex lens, the left light ray with the convex lens can make the angle difference from the two adjacent light sources to the observation point larger, and the included angle between the light rays a and b without the convex lens is much smaller than the included angle after the convex lens is added. Therefore, in the present embodiment, the angles of the light rays projected by the plural rows of core light sources 13 can be controlled within a desired angular difference range by the first convex lenses 15. The first convex lens 15 itself has a light condensing effect, and makes the light stronger.
Next, the following basic principles of virtual moire fringe technology are also introduced:
the moire fringe glass defect detection principle is based on light interference, and when two oppositely placed gratings are relatively moved or bent, obvious interference fringes, namely moire fringes, can be seen. When the glass with defects moves, the moire fringes generated by interference change, and the optical distortion shape and intensity of the glass defects can be calculated by processing the amplified deformation image by adopting a computer image processing technology according to the moire fringes acquired by the CCD camera. Compared with the detection by adopting a common light source, the moire fringe detection technology can acquire more information of the defects and is more reliable, so that the small defects such as glass ribs and the like which are difficult to detect by a common detection method can be effectively detected.
The virtual moire fringe technology is that a grating is projected on glass to form fringes in an environment, a computer generates a virtual grating to form a virtual fringe, fringe images projected from an actual grating and measured glass are overlapped with the virtual fringe to form moire fringes, a CCD lens directly collects the projected fringe images of the actual grating after the measured glass passes through the projected fringe images, the size of optical deformation is automatically obtained through moire interference simulation calculation of the computer, and then the zebra angle of the float glass is obtained through an image processing program of the computer. The method for measuring the glass zebra angle by utilizing the virtual moire fringe technology has the characteristics of high speed, high precision and easiness in automatic processing.
The following basic principles of time division multiplexing are introduced:
the time division multiplexing technology is a communication technology which interweaves different signals in different time periods, transmits the signals along the same channel, and extracts and restores the signals in each time period into original signals by a certain method on a receiving channel. In the glass movement process, in order to match with the speed, a specific line frequency is matched with the speed, one line is collected, a plurality of lines are collected in a time subdividing mode, the plurality of lines can correspond to a plurality of light sources, the corresponding LED lamp is turned on when one light source is used for scanning in a designated scanning line, the lamp is turned off when the scanning line is finished or in advance, a composite picture is formed by scanning the plurality of lines, and then the picture is extracted according to rules. The effect of a plurality of light sources can be obtained at the same position. Since the acquisition speed is several times of the conventional acquisition speed, the scanning line frequency of the camera is required to be very high, and the light source can be on or off along with the scanning high frequency of the camera.
In the present embodiment, the light source module 1 composed of the stripe light source 12 and the core light source 13 can provide a high stroboscopic light composite light field. During the detection, the detection result is obtained,
1, controlling the stripe light source 12 to light up,
if a normal light source has no streak for a small deformation such as a glass rib, the small deformation such as the glass rib is difficult to recognize and detect, and the zebra corner cannot be calculated. The fringe pattern can be formed on the glass 4 to be measured by the fringe light source 12, fig. 5 is a theoretical fringe picture without defects, fig. 6 is a deformed fringe picture when there is a small deformation such as a glass rib, a virtual fringe is added on the image analysis module side, the virtual fringe interferes with the fringe formed on the glass 4 to be measured by the fringe light source 12 to form a moire fringe, and the specific numerical value of the small deformation such as the glass rib can be calculated by a moire fringe projection method. The light field of the stripe light source 12 is used for calculating and measuring the glass rib and calculating the light variation for the small deformation and light variation of the glass rib and the like.
2, when the control core light source 13 is lighted,
for conventional defects such as bubbles and inclusions, as shown in fig. 7, fig. 7 is a conventional defect picture actually acquired by a camera under irradiation of a stripe light source, and if the conventional defect picture is acquired by using the stripe light source, due to the stripe change, the edge is not clear due to the influence of the stripe, the defect is not easy to identify, great trouble is brought to size calculation of the conventional defect, and the size and the type of the conventional defect cannot be known.
The reason why the existence of the stripes is unfavorable for the calculation of information such as the sizes of the defects and the like for the conventional defects is that the defect representation is sometimes bright and sometimes dark, but when the dark defects and the dark stripes are on the same boundary, the boundary of the defects is difficult to determine, and the defect size cannot be calculated, and similarly, when the bright defects and the bright stripes are on the same boundary, the defect size is difficult to calculate. Moreover, the streak deformation caused by the defect is strange, and sometimes even without an actual core, the streak deformation is more difficult to define a boundary.
However, the core light source 13 is provided in the present invention, when the core light source 13 is controlled to be turned on, the core light source 13 and the stripe light source 12 form a composite light field, which can effectively shield the influence of the stripe on the conventional defect, as shown in fig. 8, fig. 8 is a conventional defect picture actually acquired by a camera under the action of the composite light field formed by the stripe light source and the core light source, and the defect edge can be clearly seen from fig. 8, so that the defect information can be more easily extracted from the picture, and the size and position of the defect can be conveniently calculated.
Moreover, the information of the pictures shot by the defects by adopting a single light source is too little, so that the defects cannot be classified. In the invention, the lighting of a certain row of LEDs of the core light source 13 is controlled, the image of the glass defect under the light source with the corresponding angle can be shot, the lighting of different rows of LEDs of the core light source 13 is controlled, and the image of the glass defect under the light source with different angles can be shot, therefore, the core light source 13 in the invention can be provided with light with a plurality of angles, the images of the defect position under different angles are shot under the irradiation of a multi-angle transmission light source, the outline becomes clear, and the information such as the type, the size, the position and the like of the conventional defect can be more clearly detected. The core light source 13 is used to make calculation measurements and classification for the size and position of the regular defect.
Referring to fig. 9 to 11 again, fig. 9 is a picture of a conventional defect captured by a camera with only a stripe light source; FIG. 10 is a photograph of a conventional defect taken by a camera with a striped light source plus an angled core light source; FIG. 11 is a picture of a conventional defect taken by a camera with a striped light source plus another angled core light source. Obviously, after the core light source 13 is added, the outline of the defect becomes clearer, and meanwhile, fig. 10 and 11 are two different angles, so that the information of the type, size, position and the like of the defect can be detected more clearly through the arrangement of the multi-angle light source.
Therefore, the fringe light source 12 and the core light source 13 are adopted, and the core light source 13 can set light of a plurality of angles, so that the detection calculation of the small deformation of the glass ribs and the like can be realized, and the size and the position of the conventional defects can be calculated more accurately.
Based on the online defect detection device for float glass, the invention also provides an online defect detection method for float glass, which comprises the following steps:
s1, the front end processing module controls the light source module, lights the LED light source in turn, including: the system comprises a stripe light source (12) and a core light source (13), wherein a single-row LED light source or multiple-row LED light sources which are on at the same time are light fields, different light fields are on at different times, an imaging module (3) is focused on glass (4) to be detected, and synchronous light sources are used for sequentially acquiring images, so that each position has a corresponding image on each light field;
s2, the imaging module (3) sends the collected images of different light fields to a front-end processing module, the front-end processing module identifies the pictures of different light fields, pre-processes the pictures, finds out defects through calculation, and sends the multi-light-field images of the defects to a data terminal;
and S3, the data terminal analyzes and calculates the defect multi-light-field image given by the front-end processing module, then classifies the defects, and simultaneously labels the defect information, wherein the obtained defect information comprises the zebra corner.
Furthermore, the data terminal has a deep learning function, if a certain defect or a certain type of defect is identified insufficiently, the data terminal can be considered to be added with a sample for learning, and the detection efficiency can be greatly improved.
The core light sources include a plurality of rows which are sequentially arranged in parallel along a direction from far to near from the first convex lens, in the step S2, the core light sources in different rows are controlled to be turned on, defect images under illumination of a plurality of different angles can be obtained, the image analysis module determines defect outlines according to the defect images, and then calculates the size and position information of the defects.
Further, the reflection light source sub-module 2 includes: a second housing 21, a reflective light source 22 and a second convex lens 23 provided in the second housing 21. A second window 211 for emitting light is disposed on one side of the second housing 21, and the second window 211 faces the glass 4 to be measured. The reflective light sources 23 are also LED light sources arranged in parallel in a plurality of rows, and the arrangement direction of the reflective light sources 23 in the plurality of rows is perpendicular to the arrangement direction of the core light sources 13 in the plurality of rows. The light emitted from the reflection light source 22 is irradiated onto the second convex lens 24, and the second convex lens 24 forms a multi-angle reflection light source.
The light emitted by the reflection light source 22 is reflected by the detection position of the glass 4 to be detected and directly enters the lens of the imaging module 3. The reflection light source submodule 1 positioned above the glass 4 to be detected and the transmission light source submodule 2 positioned below the glass 4 to be detected form a space light source, the two light sources form a 360-degree surrounding effect, and more information can be used for detecting defects.
In the detection device, the transmission light source submodule 1, the imaging module 3 and the detection position are coplanar. The stripe light source 12, the core light source 13 and the reflection light source 22 are all strip line light sources, and the width of the light sources corresponds to the size of the glass 4 to be measured. During detection, the angle positions of a straight line L1 where the projection directions of the stripe light source 12 and the core light source 13 are located, a straight line L2 where the projection direction of the reflection light source 2 is located, and a normal L3 of the imaging module 3 are unchanged, and it is changed which row of LED lamps of the core light source 13 or the reflection light source 22 is turned on. In addition, the directions of the stripe light source 12, the core light source 13 and the reflection light source 22 projected on the glass 4 to be measured are not perpendicular to the glass 4 to be measured, because the height position of the defect in the glass 4 to be measured cannot be measured if the stripe light source 12, the core light source 13 and the reflection light source 22 are perpendicular to each other, and by turning on or off the LED lights in different rows in the core light source 13 and the reflection light source 22, multi-angle light can be controlled to be generated, so that multi-angle measurement calculation can be carried out on the defect.
Specifically, in the present embodiment, the imaging module 3 includes: the ultrahigh-definition high-speed linear array camera collects glass images, the high-resolution low-distortion lens and the imaging module 3 are arranged at detection positions. The straight line of the light irradiated by the transmission light submodule is L1, the straight line of the light irradiated by the reflection light submodule is L2, the normal of the imaging module 3 is L3, and the normal of the detection position of the glass 4 to be detected is L4. Specifically, in the present embodiment, the included angle between L1 and L3 ranges from 0 degree to 20 degrees, and 10 degrees is the most preferable. The angle between L2 and L4 is in the range of 0 to 20 degrees, preferably 10 degrees.
In the present embodiment, the first convex lens 15 and the second convex lens 23 are plano-convex lenses having one surface as a plane and the other surface as a convex surface, but the present invention is not limited thereto, and in some other embodiments, convex lenses having other shapes such as biconvex lenses may be used as long as the deflection angle of the parallel light can be achieved.
Further, the image analysis module comprises: front-end processing module, data terminal. The front-end processing module consists of an embedded processor and a switch, the processor is connected with other modules through a high-speed signal wire and a network cable, the front-end processor carries out de-processing on the camera picture and then transmits data to the data terminal; the processor needs to control the light source to interact with the camera at the same time, adjusting the light source parameters. The data terminal is composed of a server with a powerful operation function and a display, and analyzes and calculates the data of the front-end processor, and puts the display data of the terminal on the display for display.
Further, the online float glass defect detection device further comprises: and a cooling module. And the cooling module is a professional industrial water cooler, can continuously work for 24 hours and is used for cooling the light source module.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A light source module, comprising: a transmissive light source sub-module (1), the transmissive light source sub-module (1) comprising: stripe light source (12), core light source (13) and beam splitting subassembly, the beam splitting subassembly includes: a spectroscope (14) and a first convex lens (15);
the first convex lens (15) and the spectroscope (14) form an angle of 45 degrees;
the fringe light source (12) is arranged on one side, away from the first convex lens (15), of the light splitter (14), the projection direction of the fringe light source (12) is perpendicular to the first convex lens (15), and after light of the fringe light source (12) penetrates through the light splitter (14), grating fringes are projected to the glass (4) to be measured through the first convex lens (15);
the core light source (13) is arranged on one side, facing the first convex lens (15), of the spectroscope (14), the projection direction of the core light source (13) is parallel to the first convex lens (15), and the core light source (13) is projected to the glass (4) to be measured through the first convex lens (15) after being reflected by the spectroscope (14).
2. The light source module of claim 1, wherein the core light source (13) includes a plurality of rows arranged in parallel in a direction from far to near from the first convex lens (15), and the plurality of rows of the core light source (13) are projected toward the first convex lens (15) after being reflected by the beam splitter (14), so as to form a multi-angle transmission light source through the first convex lens (15).
3. The light source module of claim 2, further comprising: reflection submodule (2), reflection submodule (2) are located deviating from of glass (4) that awaits measuring one side of transmission light source submodule (1), reflection submodule (2) include: reflection light source (22) and second convex lens (23), the projection direction of reflection light source (22) with second convex lens (23) are perpendicular, the light that reflection light source (22) throws passes through second convex lens (23) to glass (4) projection that awaits measuring.
4. The light source module as claimed in claim 3, wherein the reflective light sources (22) comprise a plurality of rows arranged in parallel, and the light rays projected by the plurality of rows of reflective light sources (22) form a multi-angle reflective light source through the second convex lens (23).
5. The light source module according to claim 4, wherein the arrangement direction of the plurality of rows of the core light sources (13) is perpendicular to the arrangement direction of the plurality of rows of the reflective light sources (22).
6. A light source module according to claim 5, characterized in that the stripe light source (12) comprises: a first light source (121) and a striped film (122), the striped film (122) being disposed between the first light source (121) and the beam splitter (14).
7. An online defect detection device for float glass is characterized by comprising: a light source module, an imaging module (3) and an image analysis module, wherein the light source module is the light source module of any one of claims 1 to 6.
8. The float glass online defect detection apparatus of claim 7, wherein the imaging module comprises: the system comprises an ultra-high-definition high-speed linear array camera and a high-resolution low-distortion lens, wherein the ultra-high-definition high-speed linear array camera is used for collecting glass images;
the image analysis module includes: the front-end processing module consists of a processor and a switch, the processor is in communication connection with the imaging module (3), and the front-end processing module is used for processing images shot by the imaging module and then transmitting data to the data terminal; the data terminal is used for carrying out defect analysis calculation on the data transmitted by the front-end processing module and putting and displaying the calculation result data on the display;
the imaging module is further mounted with: a cooling module for cooling the imaging module (3).
9. The method of claim 7 or 8, wherein the image analysis module comprises: the detection method comprises the following steps:
s1, the front end processing module controls the light source module, lights the LED light source in turn, including: the system comprises a stripe light source (12) and a core light source (13), wherein a single-row LED light source or multiple-row LED light sources which are on at the same time are light fields, different light fields are on at different times, an imaging module (3) is focused on glass (4) to be detected, and synchronous light sources are used for sequentially acquiring images, so that each position has a corresponding image on each light field;
s2, the imaging module (3) sends the collected images of different light fields to a front-end processing module, the front-end processing module identifies the pictures of different light fields, pre-processes the pictures, finds out defects through calculation, and sends the multi-light-field images of the defects to a data terminal;
and S3, the data terminal analyzes and calculates the defect multi-light-field image given by the front-end processing module, then classifies the defects, and simultaneously labels the defect information, wherein the obtained defect information comprises the zebra corner.
10. The method as claimed in claim 9, wherein the core light sources (13) include a plurality of rows arranged in parallel in a direction from far to near from the first convex lens (15), the step S2 is performed by controlling and lighting the core light sources (13) in different rows to obtain a plurality of defect images illuminated at different angles, and the image analysis module determines a defect profile according to the plurality of defect images and calculates the size and position information of the defect.
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| CN113237898A (en) * | 2021-05-21 | 2021-08-10 | 七海测量技术（深圳）有限公司 | Detection apparatus for Moire interference light detects glass surface defect |
| CN115165926A (en) * | 2022-07-29 | 2022-10-11 | 湖南科洛德科技有限公司 | Rolled glass defect detection system |
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