Precast slab appearance feature visual identification device

Abstract

The utility model provides a prefabricated slab appearance feature visual identification device. The prefabricated slab appearance feature visual identification device comprises a plurality of rows of industrial camera group arrays. A laser ranging module array; a matrix illumination module; and the industrial camera group, the laser distance measuring sensor and the high-uniformity strip-shaped light source are fixed on the double-cross-bar camera frame to form a data acquisition module. And the dual-drive linear sliding table is used for driving the two ends of the data acquisition module to operate synchronously during acquisition. The two ends of the dual-drive linear sliding table are provided with connection fixing frames. The linear sliding table drives the two ends of the data acquisition module to operate synchronously. Connecting fixing frames are arranged at the two ends of the dual-drive linear sliding table and bear the acting force generated when the two sliding tables move linearly, so that the two linear motion units form a whole. Rail wheels are designed at the bottom of the recognition equipment. According to the prefabricated plate appearance feature visual identification device, automatic detection of a prefabricated plate component finished product is achieved, the detection cost is well reduced while the detection efficiency is effectively improved, and the product quality is improved.

Description

Technical Field

[0001] This application relates to an image and laser detection device and equipment for appearance feature recognition, and more particularly to a visual recognition device for the appearance features of precast panels. Background Technology

[0002] As a product of the construction industry's development, prefabricated buildings have great potential in the current context of green and low-carbon transformation and sustainable development. With increasing global emphasis on environmental protection and resource conservation, the construction industry faces an urgent need for transformation and upgrading. Traditional construction methods often involve significant resource waste, environmental pollution, and low construction efficiency. Prefabricated buildings, with their high efficiency, environmental friendliness, and energy conservation, have become an important direction for the green transformation of the construction industry. By using prefabricated components in factories and assembling them on-site, prefabricated buildings can significantly reduce noise, dust, and waste emissions at construction sites, effectively improve building quality and construction efficiency, and shorten construction cycles. Furthermore, the disassembly and reusability of prefabricated buildings provide unique advantages for sustainable development, contributing to the optimal allocation of resources and environmentally friendly development throughout the building's entire life cycle. Globally, more and more countries and regions are including prefabricated buildings in their policy support and promotion priorities, driving the construction industry towards a green, low-carbon, and sustainable direction.

[0003] Precast slabs refer to reinforced concrete slab components prefabricated in specialized prefabrication plants or on construction sites. These components are then transported to the construction site for assembly, forming a complete building structure. This method offers numerous advantages in the construction industry, effectively increasing the degree of factory-based and mechanized construction while reducing on-site work, saving time, and minimizing the impact of the construction environment on work. To ensure that precast wall panels meet the expected quality standards before installation, they must undergo rigorous quality testing before being transported to the construction site. This includes, but is not limited to, testing the dimensional accuracy, surface flatness, strength, and positional accuracy of embedded parts. Only when all tested items meet the design requirements can the subsequent installation work proceed smoothly, thereby ensuring the quality and safety of the entire construction project.

[0004] Traditional methods for inspecting the shape features of precast slabs mainly rely on manual methods. Visual inspection is one of the most primitive and common inspection methods. Workers use their naked eyes to observe the appearance of the precast slabs and check for obvious defects such as cracks, holes, and deformation. Dimensional measurement is performed by directly measuring the geometric dimensions of the precast slabs, such as length, width, and thickness, using tools such as tape measures and rulers to ensure that they meet the specifications on the design drawings. Mold comparison is performed by comparing the precast slabs with the molds to check whether their shape is consistent with the molds. This method is mainly used to detect the flatness and edge integrity of the precast slabs. This method has many problems: (1) It is easily affected by subjective judgment, leading to misjudgment or omission; (2) There is insufficient standardization, and the inspection standards and methods of different inspectors may differ, leading to inconsistent inspection results; (3) The inspection environment (light, temperature, humidity) may affect the judgment of the inspectors; (4) As working time increases, the visual fatigue of the inspectors will greatly increase the false detection rate; (5) Manual inspection will increase production costs; (6) It cannot meet the requirements of high efficiency, high precision, intelligent and batch inspection of precast slab products. Utility Model Content

[0005] The purpose of this application is to overcome the shortcomings in the above-mentioned background technology and provide a machine vision-based visual recognition device for the appearance features of precast slabs, so as to realize the automated detection of the shape features of precast slab components.

[0006] This application provides a visual recognition device for the appearance features of precast panels, the recognition device comprising a multi-row industrial camera array composed of multiple industrial cameras;

[0007] A laser ranging module array consisting of multiple laser ranging sensors;

[0008] A matrix illumination module composed of several highly uniform strip light sources illuminates the image acquisition area;

[0009] The industrial camera group, laser rangefinder, and highly uniform strip light source are fixed on the double crossbar camera frame to form a data acquisition module.

[0010] The identification device is also equipped with a dual-drive linear slide table. During data acquisition, the slide table drives both ends of the data acquisition module to run synchronously, ensuring the accuracy of data acquisition.

[0011] The dual-drive linear slide is equipped with connecting brackets at both ends. The linear slide drives the data acquisition module to run synchronously at both ends to ensure the accuracy of data acquisition. The connecting brackets at both ends of the dual-drive linear slide bear the force of the linear movement of the two slides, making the two linear motion units a whole.

[0012] The identification device is equipped with track wheels at the bottom.

[0013] Furthermore, multiple industrial cameras are arranged in a multi-row array according to the size of the prefabricated plate to be tested and the field of view, and are fixed on a double crossbar camera stand.

[0014] The double crossbar camera frame includes parallel frames that are mounted side-by-side on a crossbeam. The crossbeam has a first guide rail on its side, and the frame has a first slider that can move within the first guide rail. The camera is mounted on both ends of the frame.

[0015] Furthermore, multiple laser rangefinders are arrayed according to the size of the prefabricated slab to be measured and the sampling requirements, and fixed on the side of the double crossbar camera frame;

[0016] Furthermore, several highly uniform strip light sources are arranged in a matrix according to the overall field of view of the industrial camera group, and are fixed on the crossbars and beams of the double crossbar camera frame respectively.

[0017] Furthermore, the dual crossbar camera mount is fixed on the dual-drive linear slide, the dual-drive linear slide has a second guide rail on its side, the dual crossbar camera mount has a second slider at both ends that can move within the second guide rail, the dual-drive linear slide includes parallel motion units, and the bottom of the motion unit is provided with a pulley;

[0018] The camera mount is moved by a linear slide to complete multiple sets of sampling of precast slab image data and surface point cloud data.

[0019] Furthermore, the entire device is powered by a battery or an external power source. Beneficial effects

[0020] This application designs a fast-response, efficient, automated, flexible and mobile visual recognition device for the appearance features of precast slabs. Based on machine vision technology, it realizes the automated detection of the shape features of precast slab components, which can effectively improve the accuracy of detection, reduce production costs, and improve product quality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a visual recognition device for the appearance features of a prefabricated panel according to an embodiment of this application is shown.

[0023] Figure 2The diagram shows the industrial camera array structure and laser rangefinder sensor array structure of a visual recognition device for the appearance features of prefabricated slabs.

[0024] Figure 3 A schematic diagram of the overall process of a visual recognition device for the appearance features of precast slabs is shown.

[0025] Figure 1 Name of the winning designation: 101—Precast slab component to be tested; 102—Basic structural unit; 103—Laser rangefinder array unit; 104—Industrial camera array unit; 105—Double crossbar camera frame; 106—Motion unit; 107—Illumination unit. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] This application provides a visual recognition device for the appearance features of precast panels, the device comprising a multi-row industrial camera array consisting of multiple industrial cameras;

[0028] A laser ranging module array consisting of multiple laser ranging sensors;

[0029] A matrix illumination module composed of several highly uniform strip light sources illuminates the image acquisition area;

[0030] The industrial camera assembly, laser rangefinder, and highly uniform strip light source are fixed on a double crossbar camera frame, forming a data acquisition module.

[0031] The identification device also includes a dual-drive linear slide table. During data acquisition, the slide table drives both ends of the data acquisition module to run synchronously, ensuring the accuracy of data acquisition.

[0032] The dual-drive linear slide is equipped with connecting brackets at both ends. The linear slide drives the data acquisition module to run synchronously at both ends to ensure the accuracy of data acquisition. The connecting brackets at both ends of the dual-drive linear slide bear the force of the linear movement of the two slides, making the two linear motion units a whole.

[0033] The identification device is equipped with track wheels at the bottom.

[0034] Furthermore, multiple industrial cameras are arranged in a multi-row array according to the size of the prefabricated plate to be tested and the field of view, and are fixed on a double crossbar camera stand.

[0035] The double crossbar camera frame includes parallel frames that are mounted side-by-side on a crossbeam. The crossbeam has a first guide rail on its side, and the frame has a first slider that can move within the first guide rail. The camera is mounted on both ends of the frame.

[0036] Furthermore, multiple laser rangefinders are arrayed according to the size of the prefabricated slab to be measured and the sampling requirements, and fixed on the side of the double crossbar camera frame;

[0037] Furthermore, several highly uniform strip light sources are arranged in a matrix according to the overall field of view of the industrial camera group, and are fixed on the crossbars and beams of the double crossbar camera frame respectively.

[0038] Furthermore, the dual crossbar camera mount is fixed on the dual-drive linear slide, the dual-drive linear slide has a second guide rail on its side, the dual crossbar camera mount has a second slider at both ends that can move within the second guide rail, the dual-drive linear slide includes parallel motion units, and the bottom of the motion unit is provided with a pulley;

[0039] The camera mount is moved by a linear slide to complete multiple sets of sampling of precast slab image data and surface point cloud data.

[0040] Furthermore, the entire device is powered by a battery or an external power source.

[0041] like Figures 1 to 3 As shown, Figure 1 A schematic diagram of a visual recognition device for the appearance features of a precast panel according to an embodiment of this application is shown; Figure 2 The structure of the industrial camera array and the laser rangefinder sensor array of the visual recognition equipment for the appearance features of precast slabs are shown. Figure 3 A schematic diagram of the overall process of a visual recognition device for the appearance features of precast slabs is shown.

[0042] The specific technical details of this application will now be described in conjunction with the accompanying drawings, such as... Figure 1 As shown, the visual recognition device for the appearance features of precast slabs in this application includes:

[0043] The precast slab component 101 to be tested serves as the component to be tested for the camera group to collect surface images;

[0044] The basic structural unit 102 includes supporting structures such as diagonal reinforcing ribs, and is designed with track wheels at the bottom, which can move flexibly under the control of the control system.

[0045] The laser ranging sensor array unit 103 is fixed on the double crossbar camera frame 105 and consists of several laser ranging sensors. The specific number of sensors is determined by the size of the prefabricated plate to be measured and the sampling requirements.

[0046] The industrial camera array unit 104 is fixed on the double crossbar camera frame 105 and consists of several industrial cameras. The number of industrial cameras is determined by the size of the prefabricated plate to be tested and the field of view.

[0047] The double crossbar camera mount 105 consists of two long crossbars and several short crossbeams. The number of crossbeams needs to be determined based on the number of industrial cameras and the layout of the light sources in the lighting unit 108.

[0048] The motion unit 106 is connected to the double crossbar camera frame 105 and consists of two synchronous belt modules. The modules are in dual drive mode and drive the double crossbar camera frame to move.

[0049] The lighting unit 107 consists of several highly uniform strip light sources arranged in a matrix according to the overall field of view of the industrial camera group. It is used to illuminate the surface of the precast slab component to improve the quality of the acquired image.

[0050] like Figure 1 , Figure 2 , Figure 3 As shown, specifically, this embodiment provides a visual recognition device for the appearance features of precast slabs. It proposes using an industrial camera array, a laser rangefinder sensor array, and a matrix-style distributed light source to identify and detect the shape features of precast slab components of different specifications. The main steps include:

[0051] Step 1: System initialization, the control system sends a command to drive the detection system to move to the detection position, and at the same time the motion unit 106 returns to the detection origin;

[0052] Step 2: After reaching the detection position, the control system sends a start detection signal. The motion unit 106 moves to multiple command positions. The industrial camera array unit 104, the laser rangefinder array unit 103, and the illumination unit 107 move together with the double crossbar camera frame 105. After each movement to the designated position, the industrial camera group begins to acquire images and uploads them to the host computer via gigabit network. During the movement, the laser rangefinder array acquires point cloud data at regular intervals.

[0053] Step 3: Integrate multiple sets of image data information, analyze point cloud data, obtain complete images of precast slab components, and use machine vision and deep learning technologies to perform dimensional measurement and feature recognition detection;

[0054] Step 4: Call the precast slab component standard model database to compare data, determine the qualification of the precast slab to be tested, issue a test report, and retain the test data.

[0055] Step 5: After completing the inspection of the precast slab component to be tested at the current position, the control system sends a command to drive the inspection system to move to the next inspection position, while the motion unit 106 returns to the inspection origin.

[0056] The technical solution of this application has been described in detail above with reference to the accompanying drawings. This patent proposes a machine vision-based visual recognition device for the appearance features of precast slabs, which realizes automated inspection of precast slab components, effectively improves the accuracy of inspection, reduces production costs, and improves product quality.

[0057] Regarding the limitation of the scope of protection of this application, those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of this application are still within the scope of protection of this application.

Claims

1. A visual recognition device for the appearance features of precast slabs, characterized in that: The identification device comprises a multi-row industrial camera array consisting of multiple industrial cameras; A laser ranging module array consisting of multiple laser ranging sensors; A matrix illumination module composed of several highly uniform strip light sources illuminates the image acquisition area; The industrial camera group, laser rangefinder, and highly uniform strip light source are fixed on the double crossbar camera frame to form a data acquisition module. The identification device is also equipped with a dual-drive linear slide table. During data acquisition, the slide table drives both ends of the data acquisition module to run synchronously, ensuring the accuracy of data acquisition. The dual-drive linear slide is equipped with connecting brackets at both ends. The linear slide drives the data acquisition module to run synchronously at both ends to ensure the accuracy of data acquisition. The connecting brackets at both ends of the dual-drive linear slide bear the force of the linear movement of the two slides, making the two linear motion units a whole. The identification device is equipped with track wheels at the bottom.

2. The visual recognition device for the appearance features of precast slabs according to claim 1, characterized in that: Multiple industrial cameras are arranged in a multi-row array according to the size of the prefabricated plate to be tested and the field of view, and are fixed on a double crossbar camera stand; The double crossbar camera frame includes parallel frames that are mounted side-by-side on a crossbeam. The crossbeam has a first guide rail on its side, and the frame has a first slider that can move within the first guide rail. The camera is mounted on both ends of the frame.

3. The visual recognition device for the appearance features of precast slabs according to claim 1, characterized in that: Multiple laser rangefinders are arrayed according to the size of the prefabricated slab to be measured and the sampling requirements, and fixed on the side of the double crossbar camera frame.

4. The visual recognition device for the appearance features of precast slabs according to claim 1, characterized in that: Several highly uniform strip light sources are arranged in a matrix according to the overall field of view of the industrial camera group, and are fixed on the crossbars and beams of the double crossbar camera frame respectively.

5. The visual recognition device for the appearance features of precast slabs according to claim 1, characterized in that: The dual-bar camera mount is fixed on a dual-drive linear slide. The dual-drive linear slide has a second guide rail on its side and a second slider that can move within the second guide rail at both ends. The dual-drive linear slide includes parallel motion units and a pulley at the bottom of the motion unit. The camera mount is moved by a linear slide to complete multiple sets of sampling of precast slab image data and surface point cloud data.

6. The visual recognition device for the appearance features of precast slabs according to claim 1, characterized in that: The equipment is powered by either a battery or an external power source.

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