Vision-based block brick height online detection device and method

Abstract

The invention provides a vision-based block brick height online detection device and method.The online detection device is characterized in that a dust isolation box is arranged on a conveying mechanism, image information of the side face of a block brick is collected through an industrial camera arranged in the dust isolation box, and the image information is processed through a detection processing system; the height of the building block brick is converted into an actual physical height so as to analyze whether the height of the building block brick meets the standard or not, and a processing analysis result is output to a display interface of the system, so that the building block brick which does not meet the standard can be conveniently processed; according to the detection device, the detection efficiency is greatly improved, and the consistency and the accuracy of detection results are well ensured.

Description

Technical Field

[0001] The invention relates to a device and method for online detection of cut brick height based on vision. Background Art

[0002] In the construction industry, the production quality of masonry bricks is directly related to the safety and durability of buildings. Among them, whether the height size of bricks meets the standard is one of the key factors to measure product quality. Traditionally, the height detection of masonry bricks mainly relies on manual operation, and workers check the size of each brick by manual measurement. However, this method has many problems: first, manual detection is inefficient and difficult to meet the needs of large-scale production; second, manual measurement is easily affected by subjective factors, and it is difficult to ensure the consistency and accuracy of the test results, which may lead to a large number of unqualified bricks flowing into the construction market, thereby affecting the quality of construction.

[0003] With the development of industrial automation and intelligent technology, improving production efficiency and product quality has become an urgent need of modern manufacturing industry. In the field of block brick production, it is particularly important to develop an automated method and device that can adapt to online detection. However, there is currently a lack of a mature solution specifically for online detection of block brick height in the market. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a vision-based online detection device and method for the height of cut bricks to solve the above-mentioned problem.

[0005] The present invention adopts the following scheme:

[0006] The present application provides a vision-based online detection device for the height of building blocks, which is used to detect the height of die-cast building blocks, including a conveying mechanism for conveying the building blocks, a dustproof box arranged on the conveying mechanism, a light source arranged above the dustproof box, an industrial camera arranged in the dustproof box for photographing side image information of the building blocks, and a detection and processing system electrically connected to the industrial camera; the detection and processing system is used to process the side image information of the building blocks and convert it into an actual physical height, so as to analyze whether the height of the building blocks meets the preset standards, and output the results of the processing and analysis to the display interface of the system.

[0007] Furthermore, the conveying mechanism has a plurality of conveying channels; each of the conveying channels is provided with the industrial camera; the dustproof box is built in, the light source is provided above each of the conveying channels, and a light-isolating plate is provided between two of the conveying channels.

[0008] Furthermore, the light source is a strip-shaped visual light.

[0009] Furthermore, the length of the strip-shaped visual light is adapted to the length of the dust isolation box along the conveying direction of the building blocks, and the width covers the entire width of the building blocks.

[0010] Furthermore, a sensor electrically connected to the light source is included to detect whether the building block bricks enter the dust isolation box.

[0011] Furthermore, the conveying mechanism includes a frame, a conveying roller rotatably arranged on the frame through a bearing, a motor connected to the conveying roller through a chain, and a conveying belt arranged around the conveying roller.

[0012] Furthermore, it also includes a recycling device electrically connected to the detection and processing system for recycling the building bricks that do not meet the standards.

[0013] A detection method, using the above-mentioned vision-based online detection device for height of masonry bricks for detection, is characterized by comprising the following steps:

[0014] Loading the building blocks to the conveying mechanism for conveying, and turning on the light source when the building blocks enter the dust isolation box;

[0015] When the building block enters the working range of the industrial camera, the industrial camera starts to collect image information of the side of the building block, and then stores the collected image information in the form of digital signals to the detection and processing system;

[0016] The detection and processing system pre-processes the image information to determine the edge positions of the top and bottom sides of the masonry bricks and converts them into actual physical heights; and determines whether the height of the masonry bricks meets the standards;

[0017] The building blocks that meet the standards are continuously conveyed to the next workstation, while the unqualified building blocks are recycled through the recycling device.

[0018] Furthermore, the image information includes geometric features, color and texture; and the preprocessing includes denoising, edge enhancement and ROI clipping operations.

[0019] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0020] The present invention provides a vision-based online detection device for the height of building blocks and bricks, which is equipped with a dustproof box on a conveying mechanism, and uses an industrial camera arranged in the dustproof box to collect image information of the side of the building blocks and bricks, and processes the image information through a detection and processing system, and converts it into an actual physical height to analyze whether the height of the building blocks and bricks meets the standards, and outputs the processing and analysis results to a display interface of the system, so as to facilitate the processing of the building blocks and bricks that do not meet the standards; the detection device greatly improves the detection efficiency and also well ensures the consistency and accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic structural diagram of a device for online detection of the height of a masonry brick based on vision according to an embodiment of the present invention;

[0023] Figure 2 1 is a left-view structural schematic diagram of a device for online detection of the height of a masonry brick based on vision according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of image contour detection of a device for online detection of block brick height based on vision according to an embodiment of the present invention;

[0025] Figure 4 is a flow chart of a detection method according to an embodiment of the present invention;

[0026] Icons: side beam 1, conveyor belt 2, dust box 3, block brick 4, protective plate 5, frame 6, motor seat 7, chain 8, strip vision light 9, light barrier 10, motor 12, foot 13, bearing 14, industrial camera 15 DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 making creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0028] Example

[0029] Combination Figures 1 to 3 As shown, the present embodiment provides a vision-based online detection device for the height of a building block brick, which is used to detect the height of a die-cast building block brick 4, including a conveying mechanism for conveying the building block brick 4, a dustproof box 3 arranged on the conveying mechanism, a light source arranged above the dustproof box 3, an industrial camera 15 arranged in the dustproof box 3 for photographing the side image information of the building block brick 4, and a detection processing system electrically connected to the industrial camera 15; the detection processing system is used to process the side image information of the building block brick 4 and convert it into an actual physical height, so as to analyze whether the height of the building block brick 4 meets the preset standard, and output the processing and analysis results to the display interface of the system.

[0030] Specifically, in the embodiment, the conveying mechanism includes a frame 6, side beams 1 arranged on both sides of the frame 6, protective plates 5 are arranged at both ends of the side beams 1, a conveying roller rotatably arranged on the frame 6 through a bearing 14, a motor 12 connected to the conveying roller through a chain 8, and a conveyor belt 2 arranged around the conveying roller; the motor 12 is fixed on the frame 6 through a motor seat 7; and a foot 13 is arranged at the bottom of the frame 6. The conveyor belt 2 is driven by the motor 12 to move, so as to realize the conveying of the block bricks 4 placed on the conveyor belt 2.

[0031] In this embodiment, the conveying mechanism has a plurality of conveying channels; the industrial camera 15 is provided on the side of each conveying channel, and the industrial camera 15 faces the side of the conveyed building block 4. The dustproof box 3 is fixed at a certain position of the conveying channel, and the light source is provided above each conveying channel, and a light-isolating plate 10 is provided between two conveying channels; the light-isolating plate 10 can prevent the light source from affecting the building block 4 collected in the other conveying channels, and ensure accurate image recognition between the building blocks 4 between the conveying channels.

[0032] In this embodiment, the light source is a strip visual light 9, and the length of the strip visual light 9 is adapted to the length of the dustproof box 3 along the conveying direction of the building block brick 4, and the width covers the entire width of the building block brick 4, which can effectively avoid the building block brick 4 passing through the dustproof box 3 to generate reflection or shadow, thereby affecting identification.

[0033] Preferably, a sensor electrically connected to the light source is further included to detect whether the building block brick 4 enters the dust isolation box 3, so as to avoid the light source being kept turned on when no building block brick 4 is transmitted through, thereby wasting resources.

[0034] Furthermore, it also includes a recovery device electrically connected to the detection and processing system, which is used to recover the non-standard masonry bricks 4. The recovery device can be a guiding device, such as a movable guide rail arranged at the conveying outlet of the conveying mechanism, which can be movably docked with any one of the conveying channels to guide the non-standard masonry bricks 4 to the recovery channel of the next station. Alternatively, a mechanical gripper is used to pick up the non-standard masonry bricks 4 to the recovery channel of the next station for recycling. Here, the recovery device is not specifically limited.

[0035] The device is provided with a dustproof box 3 on the conveying mechanism, and an industrial camera 15 arranged in the dustproof box 3 collects image information of the side of the building block brick 4, and the image information is pre-processed by the detection and processing system and converted into an actual physical height to analyze whether the height of the building block brick 4 meets the standard, and the processing and analysis results are output to the display interface of the system, which is convenient for processing the building block brick 4 that does not meet the standard, greatly improving the detection efficiency, and also well ensuring the consistency and accuracy of the detection results.

[0036] The following is a detailed description of the detection method of using the visual-based online detection device for the height of the die-casting brick 4 to detect the die-casting brick 4. Figure 4 As shown, the following steps are included:

[0037] Load the building blocks 4 to the conveying mechanism for conveying. When the building blocks 4 enter the dust isolation box 3, the sensor detects the building blocks 4 and the light source is turned on.

[0038] When the building block 4 enters the working range of the industrial camera 15, the industrial camera 15 starts to collect image information of the side of the building block 4, including geometric features, color, texture and other information of the building block 4; and then stores the collected image information in the form of digital signals to the detection processing system;

[0039] The detection and processing system pre-processes the image information, including denoising, edge enhancement and ROI cropping operations, and performs edge detection on the collected image to determine the edge positions of the top and bottom edges of the masonry brick 4; wherein the edge detection can be implemented by an image processing algorithm, and then according to the detected pixel positions of the top and bottom edges of the brick body, combined with the calibration data of the industrial camera 15, it is converted into the actual physical height;

[0040] Then the algorithm control program performs analysis and processing, and finally outputs the processing result to the system software interface, and determines whether the height of the building block brick 4 meets the standard;

[0041] The building blocks 4 that meet the standards are continuously conveyed to the next workstation, while the unqualified building blocks 4 are recycled by the recycling device.

[0042] The above-mentioned preprocessing aims to reduce environmental noise and other interferences and improve the accuracy of edge detection. It can use Gaussian filtering to remove image noise, and it can use Canny or Sobel operator to extract edge information of bricks and detect boundary contours, and calculate the height.

[0043] In this detection method, the industrial camera 15 captures the real-time image of the masonry brick 4 through a high-resolution lens to ensure that the image details are clear and the morphological characteristics of the brick can be clearly displayed. After the image is grayed, denoised and the contrast is adjusted, the edge of the brick is more obvious; the upper and lower edge contours of the masonry brick 4 are extracted through an algorithm, and the precise position of the top and bottom edges is calibrated. According to the extracted contour information, the height of the masonry brick 4 is calculated by combining the coordinate system of the image with the known calibration parameters of the industrial camera 15 (such as camera focal length, pixel size, etc.). By analyzing the contour distance above and below the brick, the actual height value of the brick can be obtained; finally, after contour detection and height calculation, the height data of the masonry brick 4 is output, and the result is transmitted to the system display interface.

[0044] By adopting the device to detect the height of the die-cast building bricks 4, the detection efficiency is greatly improved, and the consistency and accuracy of the detection results are well guaranteed.

[0045] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A visual-based online detection device for the height of a masonry brick, used to detect the height of a die-cast masonry brick, characterized in that: It includes a conveying mechanism for conveying the building blocks, a dustproof box arranged on the conveying mechanism, a light source arranged above the dustproof box, an industrial camera arranged in the dustproof box for photographing side image information of the building blocks, and a detection and processing system electrically connected to the industrial camera; the detection and processing system is used to pre-process the side image information of the building blocks and convert it into an actual physical height, so as to analyze whether the height of the building blocks meets the preset standard, and output the processing and analysis results to the display interface of the system.

2. The visual-based online detection device for the height of masonry bricks according to claim 1 is characterized in that: The conveying mechanism has a plurality of conveying channels; each of the conveying channels is provided with the industrial camera; the dustproof box is built in, the light source is provided above each of the conveying channels, and a light-isolating plate is provided between two of the conveying channels.

3. The visual-based online detection device for the height of masonry bricks according to claim 2 is characterized in that: The light source is a strip-shaped visual light.

4. The visual-based online detection device for the height of masonry bricks according to claim 3 is characterized in that: The length of the strip-shaped visual light is adapted to the length of the dust isolation box along the conveying direction of the building blocks, and the width covers the entire width of the building blocks.

5. The visual-based online detection device for the height of masonry bricks according to claim 1 is characterized in that: A sensor electrically connected to the light source is also included to detect whether the building block bricks enter the dust isolation box.

6. The visual-based online detection device for the height of masonry bricks according to claim 1 is characterized in that: The conveying mechanism comprises a frame, a conveying roller rotatably arranged on the frame via a bearing, a motor connected to the conveying roller via a chain, and a conveying belt arranged around the conveying roller.

7. The visual-based online detection device for the height of masonry bricks according to any one of claims 1 to 6, characterized in that: It also includes a recycling device electrically connected to the detection and processing system for recycling the building bricks that do not meet the standards.

8. A detection method, using the visual-based online detection device for height of masonry bricks as claimed in claim 7, characterized in that: The following steps are involved: Loading the building blocks to the conveying mechanism for conveying, and turning on the light source when the building blocks enter the dust isolation box; When the building block enters the working range of the industrial camera, the industrial camera starts to collect image information of the side of the building block, and then stores the collected image information in the form of digital signals to the detection and processing system; The detection and processing system pre-processes the image information to determine the edge positions of the top and bottom sides of the masonry bricks and converts them into actual physical heights; and judging whether the height of the masonry bricks meets the standard; The building blocks that meet the standards are continuously conveyed to the next workstation, while the unqualified building blocks are recycled through the recycling device.

9. The detection method according to claim 8, characterized in that: The image information includes geometric features, color and texture; the preprocessing includes denoising, edge enhancement and ROI clipping operations.

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