Light source module, float glass online defect detection device and detection method thereof

Abstract

The present invention discloses a light source module, an online defect detection device for float glass and a detection method thereof, wherein the light source module comprises: a transmission light source submodule, the transmission light source submodule comprises: a stripe light source, a core light source and a spectroscopic component, the spectroscopic component comprises: a spectroscope and a first convex lens; the plane of the first convex lens faces the spectroscope and is at a 45-degree angle to the spectroscope; the stripe light source is arranged on the side of the spectroscope away from the first convex lens, and the projection direction of the stripe light source is perpendicular to the plane of the first convex lens; the core light source is arranged on the side of the spectroscope facing the first convex lens, and the projection direction of the core light source is parallel to the plane of the first convex lens, and the core light source comprises multiple rows arranged in parallel in a direction from far to near from the first convex lens. The present invention can simultaneously realize online high-precision conventional defect detection and high-precision measurement of weak deformation defects such as glass tendons.

Description

Technical Field

[0001] The present invention belongs to the technical field of machine vision, and in particular relates to a light source module, a float glass online defect detection device and a detection method thereof. Background Art

[0002] The production and forming process of float glass is completed in a tin bath with protective gas (N2 and H2). The molten glass flows continuously from the tank kiln and floats on the surface of the relatively dense tin liquid. Under the action of gravity and surface tension, the glass liquid spreads and flattens on the tin liquid surface to form a flat upper and lower surface, hardens, and is then led to the transition roller table after cooling. The rollers of the roller table rotate, pulling the glass strip out of the tin bath and into the annealing kiln. After annealing and cutting, float glass products are obtained. Compared with other forming methods, the advantages of float glass include: suitable for efficient production of high-quality flat 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 the forming method, and the energy consumption per unit product is low; the finished product utilization rate is high; it is easy to scientifically manage and realize full-line mechanization and automation, and the labor productivity is high; the continuous operation cycle can be as long as several years, which is conducive to stable production; it can provide suitable conditions for online production of some new varieties, such as electric float reflective glass, spray-coated glass during annealing, cold end surface treatment, etc.

[0003] Affected by the above production process, float glass has not only conventional defects such as bubbles, stones, inclusions, scratches, but also some very small optical defects such as optical deformation and glass tendons. Optical deformation refers to the degree of deformation of the scenery caused by the uneven surface of the glass and the uneven internal refractive index when people observe the scenery through the glass. Glass tendons refer to glass tendon stripes, which are visible in glass production but are not expected to appear. They are substances with properties very similar to glass. They refer to those strips with varying depths of burial. Most of them are irregular in shape and have no clear boundaries. They are mainly caused by insufficient mechanical flow and physical-chemical dissolution processes. They can also be understood as strips formed in the transition stage before the melt reaches uniformity through chemical, physical and structural mutual penetration. In order to continuously improve the process level, improve product yield and enhance customer satisfaction, both defects need to be detected online efficiently and accurately using appropriate methods.

[0004] At present, the existing online defect detection equipment can detect conventional defects relatively well, but it is powerless against very small optical deformations such as optical deformation and glass tendons. Although some equipment can detect defects such as glass tendons, the detection accuracy is poor and the actual application effect is poor. The solution to this is mainly to separate the detection and measurement of conventional defects from the detection and measurement of optical defects such as small deformations. Among them, small deformations, especially glass tendons, are mainly measured offline using zebra meters. Online detectors cannot accurately measure the size of glass tendon deformation.

[0005] Chinese invention patent "A method, system and device for glass defect detection" (application number: 201910875092.0, application date: 2019.09.07), Chinese invention patent "A glass defect detection method" (application number: 201710957604.9, application date: 2017.10.13), Chinese invention patent "Glass defect detection device" (application number: 201721263407.9, application date: 2017.09.28) are all online defect detection devices. Although they can detect simple bubbles and stone defects, they cannot detect tiny deformations or defects such as glass tendons.

[0006] Chinese invention patent "A glass defect detection device" (application number: 201820702486.7 application date: 2018.05.11), Chinese invention patent "Glass defect detection device" (application number: 201821048756.3 application date: 2018.07.03), Chinese invention patent "Glass defect detection device" (application number: 201721247288.8 application date: 2017.09.27), Chinese invention patent "A glass defect detection equipment" (application number: 201720562248.6 application date: 2017.05.19), Chinese invention patent "A glass defect detection method" (application number: 201710174896.9 application date: 2017.03.22) These devices or methods are all offline measurements and cannot detect tiny deformations or glass tendons.

[0007] Chinese invention patent "A device for detecting zebra angle of glass optical deformation" (application number: CN201821647687.8 application date: 2019.06.07), Chinese invention patent "Glass zebra angle measuring device" (application number: CN201420621944.6 application date: 2014.10.24), Chinese invention patent "Flat glass optical deformation automatic measuring device" (application number: CN200420006927.8 application date: 2004.03.10) These devices and methods can measure small deformations such as glass tendons, but cannot measure glass defects, and are all offline measurement methods.

[0008] Patent document with application number 201410259639.1 discloses an online detection method for float glass, which measures the zebra angle of glass online by detecting the rate of change of luminous flux within a unit period of moiré fringes. However, its defect detection measurement mainly relies on algorithms for calculation, which not only increases the burden of software calculation, but also brings errors.

[0009] In general, the existing glass online inspection equipment can only meet one of the needs of detecting conventional defects such as bubbles and stones or measuring small deformations such as glass tendons, but cannot take both into account at the same time; it cannot provide defect information from multiple angles, resulting in inaccurate defect identification and classification, and even a large number of missed detections and false detections. Summary of the invention

[0010] The main purpose of the present invention is to provide a light source module, a float glass online defect detection device and a detection method thereof, aiming to solve the problem that the existing glass defect online detection device cannot detect both conventional defects of glass and minor deformations such as glass tendons.

[0011] To achieve the above-mentioned purpose, the present invention proposes a light source module, comprising: a transmission light source submodule (1), the transmission light source submodule comprising: a stripe light source, a core light source and a beam splitter component, the beam splitter component comprising: a beam splitter and a first convex lens; the first convex lens and the beam splitter form an angle of 45 degrees; the stripe light source is arranged on a side of the beam splitter away from the first convex lens, the projection direction of the stripe light source is perpendicular to the first convex lens, and after the light of the stripe light source passes through the beam splitter, grating stripes are projected onto the glass to be tested through the first convex lens; the core light source is arranged on a side of the beam splitter facing the first convex lens, the projection direction of the core light source is parallel to the first convex lens, and after the core light source is reflected by the beam splitter, it is projected onto the glass to be tested through the first convex lens.

[0012] Preferably, along the direction from far to near from the first convex lens, the core light source includes multiple rows arranged in parallel in sequence, and the multiple rows of core light sources are projected toward the first convex lens after being reflected by the beam splitter, forming a multi-angle transmission light source through the first convex lens.

[0013] Preferably, the light source module further includes: a reflective light source sub-module, which is arranged on a side of the glass to be tested that is away from the transmissive light source sub-module, and includes: a reflective light source and a second convex lens, the projection direction of the reflective light source is perpendicular to the second convex lens, and the light projected by the reflective light source is projected toward the glass to be tested through the second convex lens.

[0014] Preferably, the reflective light source comprises a plurality of rows arranged in parallel, and the light rays projected by the plurality of rows of reflective light sources pass through the second convex lens to form a multi-angle reflective light source.

[0015] Preferably, an arrangement direction of the multiple rows of core light sources is perpendicular to an arrangement direction of the multiple rows of reflective light sources.

[0016] Preferably, the stripe light source comprises: a first light source and a stripe film, and the stripe film is arranged between the first light source and the beam splitter.

[0017] The present invention further provides an online defect detection device for float glass, comprising: 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 described above.

[0018] Preferably, the imaging module comprises: an ultra-high-definition high-speed linear array camera and a high-resolution low-distortion lens for collecting glass images; the image analysis module comprises: a front-end processing module and a data terminal, the front-end processing module is composed of a processor and a switch, the processor is communicatively connected to the imaging module, the front-end processing module is used to process the image taken by the imaging module, and then transmit the data to the data terminal; the data terminal is composed of a server and a display, the data terminal is used to perform defect analysis calculations on the data transmitted from the front-end processing module, and display the calculation result data on the display; the imaging module is also equipped with: a cooling module, the cooling module is used to cool the imaging module.

[0019] The present invention also proposes a detection method for the float glass online defect detection device, wherein the image analysis module comprises: a front-end processing terminal and a data terminal, and the detection method comprises the following steps:

[0020] S1, the front-end processing module controls the light source module to sequentially light up the LED light sources, including: a stripe light source (12) and a core light source (13), wherein a single row of LED light sources or multiple rows of LED light sources lit at the same time are a light field, and light sources lit at different times are different light fields, the imaging module (3) focuses on the glass to be tested (4), and the synchronous light source sequentially collects images, so that each position has a corresponding image on each light field;

[0021] S2, the imaging module (3) sends the collected images of different light fields to the front-end processing module, the front-end processing module identifies the images of different light fields, performs preprocessing, finds defects through calculation, and sends the multi-light field images of the defects to the data terminal;

[0022] S3, the data terminal analyzes and calculates the defect multi-light field image provided by the front-end processing module, and then classifies the defects and marks the defect information. The obtained defect information includes the zebra angle.

[0023] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0024] 1. In the float glass online detection device described in the present invention, the light source module includes a transmission light source submodule, and the transmission light source submodule includes a stripe light source and a core light source. The stripe light source can transmit grating stripes to the glass to be tested, and the virtual moiré fringe technology can be used to detect and calculate small deformations such as glass tendons. After adding the core light source to the stripe light source, conventional defects are more obvious and easier to identify in the defect image captured by the camera, which facilitates the image analysis module to analyze and calculate the size, position and other information of conventional defects. Therefore, this detection device is based on high-frequency flash composite light field technology, and can simultaneously realize online high-precision conventional defect detection and high-precision measurement of weak deformation defects such as glass tendons, as well as multi-dimensional mining of defect information to significantly improve the efficiency of defect recognition and classification.

[0025] Second, the core light source described in the present invention can form a multi-angle light source, and further can also form a multi-angle light source in the reflective light source sub-module, which can realize image acquisition of the same defect under different lighting environments, greatly improving the amount of information obtained about the defect, and significantly improving the classification and identification effects of the defects, thereby improving the accuracy of the detection results and the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 This is a structural block diagram of an online defect detection device for float glass proposed in one embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the light source module and the imaging module in the proposed float glass online defect detection device;

[0029] Figure 3 for Figure 1 Schematic diagram of the structure of the transmission light source submodule in the proposed float glass online defect detection device;

[0030] Figure 4 This is a schematic diagram of the basic principle of using a convex lens to form a multi-angle light source;

[0031] Figure 5 This is a stripe image formed by a stripe light source on the glass;

[0032] Figure 6 This is a fringe picture when there is a slight deformation on the tested glass;

[0033] Figure 7 It is a conventional defect image actually collected under the illumination of a stripe light source;

[0034] Figure 8 It is a conventional defect picture actually collected by the camera under the illumination of the core light source using the detection device of the present invention;

[0035] Fig. 9 This is a picture of a common defect taken by the camera when there is only a streak light source;

[0036] Fig.10 A picture of the regular defects that a camera captures when adding a core light source at an angle to a stripe light source;

[0037] Fig.11 A picture of the general defects that a camera captures when adding a core light source at another angle to a streak light source.

[0038] Description of the accompanying drawings of the present invention:

[0039] Label name Label name 1 Transmitted light source submodule 11 First shell 111 First Window 12 Stripe light source 121 First light source 122 Stripe Film 13 Core Light Source 14 Beamsplitter 15 First convex lens 2 Reflection light source submodule 21 Second shell 211 Second window 22 Reflected light source 23 Second convex lens 3 Imaging Module 4 Glass to be tested DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides a light source module for providing grating stripes for glass defect detection and a float glass online defect detection device.

[0046] Please refer to Figures 1 to 11 The present invention proposes an online defect detection device for float glass, comprising: a light source module, an imaging module and an image analysis module. The light source module comprises: a transmission light source submodule 1 and a reflection light source submodule 2. The light source module is used to provide grating stripes for glass defect detection. The imaging module 3 is used to obtain an appearance image of a glass to be detected 4, and the image analysis module is used to perform defect analysis on the appearance image of the glass to be detected.

[0047] The transmission light source submodule 1 includes: a first housing 11 and a stripe light source 12, a core light source 13 and a spectroscopic component arranged in the first housing 11. A first window 111 for light emission is provided on one side of the first housing 11, and the first window 111 faces the glass 4 to be tested. The stripe light source 12 includes: a first light source 121 and a stripe film 122. The stripe light source 12 is arranged at the bottom of the first housing 11. 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 a clear stripe light with light and dark stripe characteristics through the stripe film 122. The core light source 13 is arranged on the side wall of the first housing 11 and is a plurality of LED light sources arranged side by side. The spectroscopic component includes: a spectroscope 14 and a first convex lens 15. The spectroscope 14 is arranged in the first housing 11 at an angle of 45 degrees. The first convex lens 15 is a plano-convex lens. The first convex lens 15 is arranged close to the first window 111, and the plane of the first convex lens 15 is at an angle of 45 degrees to the spectroscope 14. Preferably, the ratio of transmittance to reflectivity of the beam splitter 14 is 1:1.

[0048] As a result,

[0049] First, the light from the stripe light source 12 is transmitted through the beam splitter 14 and irradiated onto the first convex lens 15. The first convex lens 15 has very little deflection on the stripe light, which can be considered to be non-deflection. The stripe light source 12 projects grating stripes onto the glass to be tested through the first convex lens 15.

[0050] Second, the light reflected by the core light source 13 through the beam splitter 14 is also perpendicular to the plane of the first convex lens 15. Multiple rows of reflected light from the core light source 13 are irradiated onto the first convex lens 15 in parallel and are emitted by the first convex lens 15. The first convex lens 15 uses its light deflection characteristics to deflect the angles of the multiple rows of reflected light.

[0051] Here, first of all, the basic principle of how convex lenses change the angle of light is introduced:

[0052] When light from different angles shines on the same object, the light and shadow produced by the object are different. The greater the difference between different angles, the greater the difference in light and shadow effects. Therefore, different types of defects can be detected by using different effect diagrams. Please refer to Figure 4 As shown in the schematic diagram, compared with the light without convex lens on the right, the angle difference between two adjacent light sources and the observation point can be increased by using convex lens on the left, and the angle between light a and light b without convex lens is much smaller than the angle after adding convex lens. Therefore, in this embodiment, the angle of the light projected by the multiple rows of core light sources 13 can be controlled within the desired angle difference range by the first convex lens 15. The first convex lens 15 itself has a focusing effect, which will make the light stronger.

[0053] Secondly, the basic principle of virtual moiré fringe technology is introduced:

[0054] The principle of moiré fringe glass defect detection is based on the interference of light. When two gratings placed opposite to each other move or bend relative to each other, obvious interference fringes, namely moiré fringes, can be seen. When the defective glass moves, the moiré fringes generated by the interference also change accordingly. According to the moiré fringes collected by the CCD camera, the magnified deformed image is processed using computer image processing technology to calculate the light distortion shape and intensity of the glass defect. Compared with the detection using ordinary light sources, the moiré fringe detection technology can obtain more information about the defects and is more reliable. Therefore, it can effectively detect tiny defects such as glass tendons that are difficult to detect with ordinary detection methods.

[0055] The virtual moiré fringe technology uses a grating to project stripes on the glass in the environment. A virtual grating is generated by the computer to make a virtual stripe. The stripe image from the actual grating and the measured glass will be superimposed with the virtual stripe to form a moiré fringe. The CCD lens directly collects the projected stripe image of the actual grating after passing through the measured glass. After the computer's moiré interference simulation calculation, the size of the optical deformation is automatically obtained, and then the zebra angle of the float glass is obtained through the computer image processing program. The use of virtual moiré fringe technology to measure the zebra angle of glass has the characteristics of fast speed, high accuracy and easy automation processing.

[0056] Let me introduce the basic principles of time division multiplexing technology:

[0057] Time division multiplexing technology is a communication technology that interweaves different signals in different time periods, transmits them along the same channel, and then uses some method in the receiving channel to extract the signals in each time period and restore them to the original signals. This technology can transmit multiple signals on the same channel. During the movement of the glass, in order to match the speed, there will be a specific line frequency to match it. The time to collect one line is further divided into multiple lines. These multiple lines can correspond to multiple light sources. When a certain light source scans a specified scan line, the corresponding LED light will light up. When the scan line ends or the light is turned off in advance, multiple lines are scanned to form a composite picture, and then the picture is extracted according to the rules. This is equivalent to the effect of multiple light sources in the same position. Since the acquisition speed is several times the previous acquisition speed, this requires the camera to have a high scanning line frequency, and the light source will also turn on and off with the camera's scanning high frequency.

[0058] In this embodiment, the light source module 1 composed of the stripe light source 12 and the core light source 13 can provide a high-frequency flash composite light field.

[0059] 1. Control the stripe light source 12 to light up.

[0060] For small deformations such as glass tendons, if ordinary light sources do not have stripes, it is difficult to identify and detect small deformations such as glass tendons, and it is also impossible to calculate the zebra angle. The stripe light source 12 can form a stripe pattern on the glass 4 to be tested. Figure 5 This is a theoretical stripe image when there are no defects. Figure 6 For the deformed fringe picture when there is a small deformation such as glass tendons, virtual fringes are added on the image analysis module side. The virtual fringes interfere with the fringes formed by the fringes light source 12 on the glass 4 to be tested to form moiré fringes. The specific values ​​of small deformations such as glass tendons can be calculated by the moiré fringe projection method. The light field of the fringes light source 12 is used to calculate and measure glass tendons and calculate light changes for small deformations such as glass tendons.

[0061] 2. When the control core light source 13 is turned on,

[0062] For conventional defects such as bubbles and inclusions, Figure 7 As shown, Figure 7 These are conventional defect images actually captured by a camera under the illumination of a stripe light source. If a stripe light source is still used to capture conventional defect images, the stripes will change, and the edges will be unclear, making it difficult to identify the defects. This will cause great trouble in calculating the size of conventional defects, and it will be impossible to know the size and type of conventional defects.

[0063] As for why the presence of stripes is not conducive to the calculation of defect size and other information for conventional defects, this is because the defect sometimes appears bright and sometimes dark, but when the dark defect and the dark stripe are on the same boundary, it is difficult to determine the boundary of the defect and the size of the defect cannot be calculated. Similarly, when the bright defect and the bright stripe are on the same boundary, it is also difficult to calculate the size of the defect. In addition, the stripe deformation caused by the defect is very strange, and sometimes there is no actual core, which makes it even more difficult to define the boundary of the stripe deformation.

[0064] However, the present invention is provided with a core light source 13. When the core light source 13 is controlled to light up, the core light source 13 and the stripe light source 12 form a composite light field, which can effectively shield the influence of the stripes on conventional defects, such as Figure 8 As shown, Figure 8 is a conventional defect image actually collected by the camera under the composite light field formed by the stripe light source and the core light source. Figure 8 The defect edge can be clearly seen, making it easier to extract defect information from the image and facilitate calculation of the defect size and position.

[0065] Moreover, the image information of defects captured by a single light source is too little to classify the defects. In the present invention, by controlling a row of LEDs of the core light source 13 to light up, images of glass defects under the corresponding angle light source can be captured. By controlling different rows of LEDs of the core light source 13 to light up, images of glass defects under different angle light sources can be captured. Therefore, the core light source 13 in the present invention can be set to light at multiple angles, and images of defect positions at different angles can be captured under the illumination of multi-angle transmission light sources. The contour becomes clear, and the type, size, position and other information of conventional defects can be detected more clearly. The core light source 13 is used to calculate, measure and classify the size and position of conventional defects.

[0066] Please refer to Figures 9 to 11 , Fig. 9 This is a picture of a common defect taken by the camera when there is only a streak light source; Fig.10 A picture of the regular defects that a camera captures when adding a core light source at an angle to a stripe light source; Fig.11The image of a regular defect taken by the camera when a core light source at another angle is added to the stripe light source. Obviously, after adding the core light source 13, the outline of the defect becomes clearer. Fig.10 and Fig.11 These are two different angles, so by setting up a multi-angle light source, the type, size, location and other information of the defect can be detected more clearly.

[0067] Therefore, the present invention adopts a stripe light source 12 and a core light source 13, and the core light source 13 can set light at multiple angles, so that it can not only realize the detection and calculation of small deformations such as glass tendons, but also can more accurately calculate the size and position of conventional defects.

[0068] Based on the above float glass online defect detection device, the present invention also proposes a float glass online defect detection method, comprising the following steps:

[0069] S1, the front-end processing module controls the light source module to sequentially light up the LED light sources, including: a stripe light source (12) and a core light source (13), wherein a single row of LED light sources or multiple rows of LED light sources lit at the same time are a light field, and light sources lit at different times are different light fields, the imaging module (3) focuses on the glass to be tested (4), and the synchronous light source sequentially collects images, so that each position has a corresponding image on each light field;

[0070] S2, the imaging module (3) sends the collected images of different light fields to the front-end processing module, the front-end processing module identifies the images of different light fields, performs preprocessing, finds defects through calculation, and sends the multi-light field images of the defects to the data terminal;

[0071] S3, the data terminal analyzes and calculates the defect multi-light field image provided by the front-end processing module, and then classifies the defects and marks the defect information. The obtained defect information includes the zebra angle.

[0072] Furthermore, the data terminal has a deep learning function. If the recognition of a certain defect or a certain type of defect is not accurate enough, it can be considered that adding samples for learning can greatly improve the detection efficiency.

[0073] Among them, the core light source includes multiple rows arranged in parallel in a direction from far to near from the first convex lens. In the step S2, by controlling the lighting of different rows of core light sources, defect images under multiple different angles of illumination can be obtained. The image analysis module determines the defect contour based on the multiple defect images, and then calculates the size and position information of the defect.

[0074] Furthermore, the reflective light source submodule 2 includes: a second housing 21, a reflective light source 22 and a second convex lens 23 arranged in the second housing 21. A second window 211 for light to be emitted is provided on one side of the second housing 21, and the second window 211 faces the glass to be tested 4. The reflective light source 23 is also a plurality of rows of parallel LED light sources, and the arrangement direction of the plurality of rows of reflective light sources 23 is perpendicular to the arrangement direction of the plurality of rows of core light sources 13. The light emitted by the reflective light source 22 is irradiated onto the second convex lens 24, and a multi-angle reflective light source is formed through the second convex lens 24.

[0075] The light emitted by the reflective light source 22 is reflected by the detection position of the glass to be tested 4 and directly enters the lens of the imaging module 3. The reflective light source submodule 1 located above the glass to be tested 4 and the transmitted light source submodule 2 located below the glass to be tested 4 form a spatial light source, and the two light sources form a 360-degree surround effect, which can provide more information for defect detection.

[0076] It should be noted that in the present 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 source corresponds to the size of the glass to be tested 4. During the detection, the angle positions of the straight line L1 where the projection direction of the stripe light source 12 and the core light source 13 is located, the straight line L2 where the projection direction of the reflection light source 2 is located, and the normal line L3 of the imaging module 3 do not change. What changes is which row of LED lights in the core light source 13 or the reflection light source 22 is lit. In addition, the directions in which the stripe light source 12, the core light source 13 and the reflection light source 22 are projected onto the glass to be tested 4 are not perpendicular to the glass to be tested 4, because if they are perpendicular, it is impossible to measure the height position of the defect in the glass to be tested 4. By lighting or turning off different rows of LED lights in the core light source 13 and the reflection light source 22, it is possible to control the generation of multi-angle light, so that multi-angle measurement and calculation of defects can be performed.

[0077] Specifically in this embodiment, the imaging module 3 includes: an ultra-high-definition high-speed linear array camera for collecting glass images and a high-resolution low-distortion lens, and the scanning position of the imaging module 3 is the detection position. The straight line where the light emitted by the transmission photon module is located is L1, the straight line where the light emitted by the reflection photon module is located is L2, the normal line of the imaging module 3 is L3, and the detection position normal line of the glass 4 to be detected is L4. Specifically in this embodiment, the angle range between L1 and L3 is 0 degrees to 20 degrees, and 10 degrees is the optimal value. The angle range between L2 and L4 is 0 degrees to 20 degrees, preferably 10 degrees.

[0078] In this embodiment, the first convex lens 15 and the second convex lens 23 are plano-convex lenses with one side being flat and the other side being convex. However, without limitation, in other embodiments, convex lenses of other shapes such as double convex lenses may also be used as long as the deflection angle of parallel light can be achieved, which is not limited here.

[0079] Furthermore, the image analysis module includes: a front-end processing module and a data terminal. The front-end processing module is composed of an embedded processor and a switch. The processor is connected to other modules through high-speed signal lines and network cables. The front-end processor processes the camera image and then transmits the data to the data terminal. The processor needs to control the light source to interact with the camera and adjust the light source parameters at the same time. The data terminal is composed of a server with powerful computing functions and a display. The data terminal analyzes and calculates the data of the front-end processor and displays the terminal display data on the display.

[0080] Furthermore, the float glass online defect detection device further comprises: a cooling module. The cooling module is a professional industrial water cooler that can work 24 hours a day and is used to cool the light source module.

[0081] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A light source module, characterized in that: include: A transmission light source submodule (1), the transmission light source submodule (1) comprising: a stripe light source (12), a core light source (13) and a light splitting component, the light splitting component comprising: a beam splitter (14) and a first convex lens (15); The first convex lens (15) and the beam splitter (14) form an angle of 45 degrees; The stripe light source (12) is arranged on a side of the beam splitter (14) away from the first convex lens (15); the projection direction of the stripe light source (12) is perpendicular to the first convex lens (15); after the light of the stripe light source (12) passes through the beam splitter (14), the light is projected onto the glass to be tested (4) through the first convex lens (15) to form grating stripes; The core light source (13) is arranged on a side of the beam splitter (14) facing the first convex lens (15), and the projection direction of the core light source (13) is parallel to the first convex lens (15). After being reflected by the beam splitter (14), the core light source (13) is projected toward the glass to be tested (4) through the first convex lens (15); along the direction from far to near from the first convex lens (15), the core light source (13) includes a plurality of rows arranged in sequence, and after being reflected by the beam splitter (14), the plurality of rows of core light sources (13) are projected toward the first convex lens (15), forming a multi-angle transmission light source through the first convex lens (15).

2. The light source module according to claim 1, wherein: Also includes: A reflective light source submodule (2), the reflective light source submodule (2) being arranged on a side of the glass to be tested (4) away from the transmissive light source submodule (1), the reflective light source submodule (2) comprising: a reflective light source (22) and a second convex lens (23), the projection direction of the reflective light source (22) being perpendicular to that of the second convex lens (23), and the light projected by the reflective light source (22) being projected toward the glass to be tested (4) through the second convex lens (23).

3. The light source module according to claim 2, wherein: The reflective light source (22) comprises a plurality of rows arranged in parallel, and the light rays projected by the plurality of rows of reflective light sources (22) pass through the second convex lenses (23) to form a multi-angle reflective light source.

4. The light source module according to claim 3, wherein: The arrangement direction of the multiple rows of core light sources (13) is perpendicular to the arrangement direction of the multiple rows of reflection light sources (22).

5. The light source module according to claim 4, characterized in that: The stripe light source (12) comprises: a first light source (121) and a stripe film (122), wherein the stripe film (122) is arranged between the first light source (121) and the beam splitter (14).

6. A float glass online defect detection device, characterized in that: include: A light source module, an imaging module (3) and an image analysis module, wherein the light source module is the light source module according to any one of claims 1 to 5.

7. The float glass online defect detection device according to claim 6, characterized in that: The imaging module includes: an ultra-high-definition high-speed linear array camera and a high-resolution low-distortion lens for collecting glass images; The image analysis module comprises: a front-end processing module and a data terminal. The front-end processing module is composed of a processor and a switch. The processor is in communication with the imaging module (3). The front-end processing module is used to process the image captured by the imaging module and then transmit the data to the data terminal. The data terminal is composed of a server and a display. The data terminal is used to perform defect analysis calculations on the data transmitted by the front-end processing module and display the calculation result data on the display. The imaging module is also equipped with a cooling module, which is used to cool the imaging module (3).

8. A method for detecting float glass online defect detection device according to claim 6 or 7, characterized in that: The image analysis module includes: a front-end processing terminal and a data terminal, and the detection method includes the following steps: S1, the front-end processing module controls the light source module to sequentially light up the LED light sources, including: a stripe light source (12) and a core light source (13), wherein a single row of LED light sources or multiple rows of LED light sources lit at the same time are a light field, and light sources lit at different times are different light fields, the imaging module (3) focuses on the glass to be tested (4), and the synchronous light source sequentially collects 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 the front-end processing module, the front-end processing module identifies the images of different light fields, performs preprocessing, finds defects through calculation, and sends the multi-light field images of the defects to the data terminal; S3, the data terminal analyzes and calculates the defect multi-light field image provided by the front-end processing module, and then classifies the defects and marks the defect information. The obtained defect information includes the zebra angle.

9. The detection method of the float glass online defect detection device according to claim 8, characterized in that: The core light source (13) includes a plurality of rows arranged in parallel in sequence from far to near from the first convex lens (15). In the step S2, by controlling the lighting of different rows of core light sources (13), defect images under a plurality of different angles of illumination can be obtained. The image analysis module determines the defect contour based on the plurality of defect images, and then calculates the size and position information of the defect.

Images