A Comprehensive Detection Device and Method for Straightness and Width of Strip Based on Multi-Line Structured Light

Abstract

The application discloses a kind of based on multi-line structured light's plate strip flatness and width comprehensive detection device and method, belong to metallurgical detection technical field, the device includes: industrial area array camera, multi-line structured light light source, speed measurement unit, PLC controller, image processing server and signal measurement unit;The device is by projecting multi-line structured light on plate strip surface, using industrial area array camera carries out the image acquisition of plate strip surface including multi-line structured light, is combined with camera calibration, line structured light strip center line coordinate extraction, the flatness and width of multiple positions of plate strip full length are calculated, realize the on-line detection and display of plate strip flatness and width.The plate strip flatness and width comprehensive detection device of the application has the advantages that detection precision is high, real-time is good, overall structure is simple, easy to install and maintain, can satisfy the flatness and width detection requirement of plate strip industrial production process.

Description

Technical Field

[0001] This invention relates to the field of metallurgical testing technology, and in particular to a device and method for comprehensively testing the flatness and width of strips and plates based on multi-line structured light. Background Technology

[0002] Flatness is a crucial indicator for sheet and strip production control. Accurate measurement of flatness is essential for closed-loop control of sheet shape quality and is indispensable for product quality evaluation and grading. Furthermore, width, as a core dimension of sheet and strip, also needs to be measured in most production scenarios, along with flatness, and is subject to closed-loop control and verification.

[0003] Currently, the measurement of strip width and straightness both require the installation of two separate instruments, necessitating a large installation space. For the measurement of strip straightness, there are mainly two types: contact and non-contact. However, regardless of the method, the current products are very expensive, and the cost of maintenance and upgrades is also very high. As a result, many steel companies have had to sacrifice control accuracy and abandon the use of some straightness testing equipment.

[0004] Contact-type flatness measuring equipment offers direct signal measurement and high accuracy, but its cost and accessories are expensive, it easily scratches the surface of the strip steel, and maintenance is difficult. It is generally suitable for cold rolling production lines with relatively good working environments. Non-contact-type flatness measuring equipment, on the other hand, has a simple structure, is easy to maintain, and is convenient to install. It is mostly used in hot rolling production lines. However, existing non-contact equipment has high requirements for the frequency of image acquisition, is difficult to eliminate the influence of factors such as vibration, and has high requirements for image data processing, making it difficult to achieve good application in actual production. Summary of the Invention

[0005] This invention provides a device and method for comprehensive detection of the flatness and width of a strip based on multi-line structured light, in order to solve the technical problem that the existing technology is difficult to apply well in actual production.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] On one hand, the present invention provides a comprehensive detection device for the flatness and width of a strip based on multi-line structured light. The comprehensive detection device for the flatness and width of a strip based on multi-line structured light includes an industrial area scan camera, a multi-line structured light source, a speed measurement unit, a PLC controller, an image processing server, and a signal measurement unit.

[0008] The industrial area scan camera, the multi-line structured light source, and the speed measurement unit are installed above the conveyor belt along the conveyor belt running direction, and the signal measurement unit is installed in front of the speed measurement unit; the industrial area scan camera, the multi-line structured light source, the speed measurement unit, and the signal measurement unit are all communicatively connected to the PLC controller; the industrial area scan camera and the PLC controller are all communicatively connected to the image processing server.

[0009] The signal measurement unit is used to detect the position of the strip; the speed measurement unit is used to measure the running speed of the strip; when the head of the strip reaches the position of the signal measurement unit, the PLC controller turns on the multi-line structured light source and the industrial area scan camera; wherein, after the speed measurement unit measures the running speed of the strip, the PLC controller calculates the shooting frequency based on the running speed of the strip and the parameters of the multi-line structured light projected by the multi-line structured light source; the multi-line structured light source projects the multi-line structured light onto the surface of the strip perpendicular to the roller plane and the running direction of the strip; the industrial area scan camera acquires an image of the strip surface containing the multi-line structured light according to the shooting frequency calculated by the PLC controller, and transmits the acquired image to the image processing server; wherein, the optical axis of the industrial area scan camera forms a preset angle with the plane of the multi-line structured light projected by the multi-line structured light source; when the tail of the strip reaches the position of the industrial area scan camera, the PLC controller turns off the multi-line structured light source and the industrial area scan camera.

[0010] The image processing server is used to calculate the flatness and width of multiple locations along the entire length of the strip based on the images acquired by the industrial area array camera and the camera calibration results.

[0011] Furthermore, the integrated detection device for the flatness and width of the strip based on multi-line structured light also includes an installation platform; the installation platform spans the strip running roller conveyor and is installed directly above the strip running roller conveyor; the industrial area array camera and the multi-line structured light source are installed inside the installation platform.

[0012] Furthermore, the integrated detection device for the flatness and width of the strip based on multi-line structured light also includes a display; the display is communicatively connected to an image processing server; after the image processing server calculates the flatness and width at multiple positions along the entire length of the strip based on the image acquired by the industrial area array camera and the camera calibration results, the display is used to display the calculation results of the image processing server.

[0013] Furthermore, the integrated detection device for flatness and width of the strip based on multi-line structured light also includes a water-cooling device, and the industrial area array camera and the multi-line structured light source are connected to the water-cooling device; the water-cooling device is used to cool down the industrial area array camera and the multi-line structured light source.

[0014] Furthermore, the number of linear structured light rays projected by the multi-line structured light source is no less than three.

[0015] Furthermore, the light planes of the structured light projected by the multi-line structured light source are parallel to each other, and the distance between any two adjacent light planes of the structured light is equal.

[0016] Furthermore, the distance between the light planes of two adjacent line structured lights is 30–300 mm.

[0017] Furthermore, the preset included angle is 20 to 70 degrees and the camera's field of view covers all line structured light.

[0018] Furthermore, the formula for calculating the shooting frequency is:

[0019]

[0020] Where η represents the shooting frequency; v represents the running speed of the strip; l represents the distance between the light planes of two adjacent line structured lights; and m represents the number of line structured light rays projected by the multi-line structured light source.

[0021] Furthermore, the image processing server is specifically used for:

[0022] First, a threshold segmentation algorithm is used to extract the region of interest from the image acquired by the industrial area array camera. Second, based on the extracted region of interest, the center line coordinates of the line structured light with sub-pixel precision are extracted using a Gaussian operator. Then, the coordinates of the endpoints where the line structured light intersects with both sides of the strip are obtained through edge point recognition, and the strip width is calculated. Finally, the wave height and strip straightness are calculated based on the center line coordinates of multiple line structured lights.

[0023] On the other hand, the present invention also provides a method for comprehensive detection of strip flatness and width based on the above-mentioned strip flatness and width comprehensive detection device based on multi-line structured light, the method comprising:

[0024] S0: After the detection device is installed, the measurement system is calibrated to obtain the camera's intrinsic and extrinsic parameters, as well as the calibration parameters of the light plane;

[0025] S1: After calibration, start the signal measurement unit and speed measurement unit. When the strip head moves to the position of the signal measurement unit, the PLC controller turns on the multi-line structured light source and industrial area scan camera.

[0026] S2: When the strip head reaches the position of the speed measurement unit, the shooting frame rate of the industrial area array camera is calculated based on the obtained strip running speed. The PLC controller controls the industrial area array camera to continuously shoot and acquire images.

[0027] S3: The acquired images are transmitted to the image processing server, where the strip width, waviness height, and straightness parameters are calculated and displayed on the monitor.

[0028] S4: When the tail of the strip reaches the location of the signal measurement unit, activate the delayed shutdown function of the multi-line structured light source and the industrial area scan camera. When the tail of the strip reaches the location of the industrial area scan camera, shut down the multi-line structured light source and the industrial area scan camera, and end the shooting.

[0029] The beneficial effects of the technical solution provided by this invention include at least the following:

[0030] This invention can simultaneously detect the flatness and width of strip materials during production processes such as flattening, straightening, and heat treatment. It can also effectively reduce the image sampling frequency, eliminate the influence of factors such as vibration on the flatness detection accuracy, and the equipment of this invention has small installation space requirements, high detection accuracy, and good maintainability. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the integrated detection device for flatness and width of strip based on multi-line structured light provided in the embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Industrial area scan camera; 2. Multi-line structured light source; 3. Velocity measurement unit;

[0035] 4. PLC controller; 5. Image processing server; 6. Monitor; 7. Mounting platform;

[0036] 8. Water cooling equipment; 9. Signal measurement unit; 10. PLC workstation for strip production control;

[0037] 11. Belt and strip running roller conveyor. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0039] First, it should be noted that in the embodiments of the present invention, the words "exemplarily," "for example," etc., are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the term "exemplarily" is intended to present the concept in a specific manner. Furthermore, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either one or the other.

[0040] Furthermore, in the embodiments of the present invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent.

[0041] This embodiment provides a comprehensive detection device for the flatness and width of a strip based on multi-line structured light, as described above. Figure 1 As shown, the device includes: an industrial area scan camera 1, a multi-line structured light source 2, a speed measurement unit 3, a PLC controller 4, an image processing server 5, a display 6, a mounting platform 7, a water cooling device 8, a signal measurement unit 9, and a board and strip production control PLC workstation 10.

[0042] The speed measurement unit 3 can be a Doppler laser velocimeter, although this embodiment does not limit its specific type. The mounting platform 7 spans the conveyor belt 11 and is installed directly above it. The industrial area array camera 1 and the multi-line structured light source 2 are installed inside the mounting platform 7. The speed measurement unit 3 is installed above the conveyor belt 11, along the conveyor belt running direction, and the signal measurement unit 9 is installed in front of the speed measurement unit 3. The industrial area array camera 1, the multi-line structured light source 2, the speed measurement unit 3, the signal measurement unit 9, and the conveyor belt production control PLC workstation 10 are all connected to the PLC controller 4 via signal lines. The PLC controller 4 controls the on / off states of the industrial area array camera 1, the multi-line structured light source 2, and the speed measurement unit 3, and acquires conveyor belt production data. The industrial area array camera 1 and the display 6 are connected to the image processing server 5. The image processing server 5 is connected to the PLC controller 4 via Ethernet. The industrial area array camera 1 and the multi-line structured light source 2 are connected to the water cooling equipment 8, which is used to cool the equipment.

[0043] During operation, speed measurement unit 3 measures the running speed of the conveyor belt. When the head of the conveyor belt reaches the position of signal measurement unit 9, PLC controller 4 turns on multi-line structured light source 2 and industrial area scan camera 1. After speed measurement unit 3 measures the running speed of the conveyor belt, PLC controller 4 calculates the shooting frequency based on the running speed of the conveyor belt and the parameters of the multi-line structured light projected by multi-line structured light source 2. Multi-line structured light source 2 projects multi-line structured light onto the surface of the conveyor belt perpendicular to the roller plane and the running direction of the conveyor belt. Industrial area scan camera 1 acquires images of the conveyor belt surface containing multi-line structured light according to the shooting frequency calculated by PLC controller 4 and transmits the acquired images to image processing server 5. The optical axis of industrial area scan camera 1 forms a preset angle with the plane of the line structured light projected by multi-line structured light source 2. When the tail of the conveyor belt reaches the position of industrial area scan camera 1, PLC controller 4 turns off multi-line structured light source 2 and industrial area scan camera 1.

[0044] Image processing server 5 is used to calculate the flatness and width of multiple positions along the entire length of the strip based on images acquired by industrial area array camera 1 and camera calibration results, and displays them on display 6.

[0045] Specifically, in this embodiment, the multi-line structured light source 2 has at least three line structured light rays. The light planes of each line structured light ray are parallel and equidistant. The distance between two light rays is configured within the range of 30–300 mm according to the detection requirements, and the number of line structured light rays is flexibly configured according to different detection conditions. The optical axis of the industrial area array camera 1 is tilted at a certain angle to the light plane of the line structured light ray for shooting, with the angle ranging from 20 to 70 degrees, and the shooting field of view covers all light rays. The formula for calculating the shooting frequency is:

[0046]

[0047] Where η represents the shooting frequency; v represents the running speed of the board and strip; l represents the distance between two adjacent rays of the multi-line structured light; and m represents the number of multi-line structured rays.

[0048] Based on the above, the process of using this detection device to comprehensively detect the flatness and width of the strip is as follows:

[0049] S0: After the detection device is installed, the measurement system is calibrated to obtain the camera's intrinsic and extrinsic parameters, as well as the calibration parameters of the light plane;

[0050] S1: After calibration, start the signal measurement unit 9 and the speed measurement unit 3. When the strip head moves to the position of the signal measurement unit 9, the PLC controller 4 turns on the multi-line structured light source 2 and the industrial area array camera 1.

[0051] S2: When the strip head reaches the position of the speed measurement unit 3, the shooting frame rate of the industrial area array camera 1 is calculated based on the obtained strip running speed. The PLC controller 4 controls the industrial area array camera 1 to continuously shoot and acquire images.

[0052] S3: The acquired images are transmitted to the image processing server 5, where the strip width, waviness height, and straightness parameters are calculated through image processing and displayed on the monitor 6;

[0053] S4: When the tail of the strip reaches the position of the signal measurement unit 9, the delayed shutdown function of the multi-line structured light source 2 and the industrial area scan camera 1 is activated. When the tail of the strip reaches the position of the industrial area scan camera 1, the multi-line structured light source 2 and the industrial area scan camera 1 are turned off, and the shooting ends.

[0054] The process of calculating the strip width, wave height, and flatness parameters through image processing specifically includes: first, using a threshold segmentation algorithm to extract the region of interest (ROI) from the image acquired by the industrial area array camera; second, based on the extracted ROI, extracting the center line coordinates of the line structured light with sub-pixel precision using a Gaussian operator; then, obtaining the coordinates of the endpoints where the line structured light intersects with both sides of the strip through edge point recognition, and calculating the strip width; finally, calculating the wave height and strip flatness based on the center line coordinates of multiple line structured lights.

[0055] Specifically, in this embodiment, the calculation process for wave height and strip straightness is as follows:

[0056] P measurement channels are selected on the online structured light along the width direction of the strip, that is, P fibers are selected as the detection objects along the width direction (the value of P is freely configured according to the detection requirements, and can be selected from 10 to 200. This embodiment does not make a specific limitation). The wave height h is calculated using the following formula:

[0057] h = max(z) i,j )

[0058] In the formula, z i,j For detection length l set =n set ·l range n set +1 measurement points, the measurement height of fiber i at the j-th measurement point, n set +1 indicates the number of line structured lights within the detection length range, n set This indicates the number of adjacent structured light beam distances.

[0059] Among them, the straightness F of fiber i i The following formula is used for calculation:

[0060]

[0061] In the formula, L center L is the length of the fiber on the plane of symmetry of the strip width. i The length of fiber i is calculated using the following formula:

[0062]

[0063] In the formula, z i,j+1 For detection length l set =n set ·l range n set The measured height of fiber i at the (j+1)th measurement point in the +1 measurement points.

[0064] In summary, this embodiment provides a comprehensive detection device for the flatness and width of a strip based on multi-line structured light, and a method for comprehensive detection of the flatness and width of a strip using this device. The device projects multi-line structured light onto the strip surface, uses an industrial area array camera to acquire images of the strip surface containing the multi-line structured light, and combines camera calibration and extraction of the centerline coordinates of the structured light strips to calculate the flatness and width at multiple locations along the entire length of the strip, achieving online detection and display of the strip's flatness and width. The device of this embodiment can effectively reduce the image sampling frequency, eliminate the influence of factors such as vibration on the flatness detection accuracy, and has small installation space requirements, high detection accuracy, and good maintainability.

[0065] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely or partially hardware embodiment, a completely or partially software embodiment, or an embodiment combining software and hardware aspects. Moreover, when implemented in software, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive (SSD).

[0066] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0067] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0068] It should also be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. Additionally, the character " / " in this document generally indicates an "or" relationship between the preceding and following related objects, but it may also indicate an "and / or" relationship; please refer to the context for specific interpretation. "At least one" means one or more, and "more" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0069] Furthermore, it is understood that in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0070] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0071] In the several embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of functional modules / units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Additionally, the functional units in the various embodiments of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0072] If the method is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0073] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. A multi-line structured light based strip flatness and width comprehensive detection device, characterized in that, The multi-line structured light-based strip flatness and width comprehensive detection device comprises an industrial area array camera, a multi-line structured light source, a speed measurement unit, a PLC controller, an image processing server and a signal measurement unit. The industrial area array camera, the multi-line structured light source and the speed measurement unit are installed above a strip running roller way; along a strip running direction, the signal measurement unit is installed in front of the speed measurement unit; the industrial area array camera, the multi-line structured light source, the speed measurement unit and the signal measurement unit are respectively in communication connection with the PLC controller; the industrial area array camera and the PLC controller are respectively in communication connection with the image processing server. The signal measurement unit is used for detecting the position of the strip; the speed measurement unit is used for measuring the running speed of the strip; when the head of the strip runs to the position of the signal measurement unit, the PLC controller turns on the multi-line structured light source and the industrial area array camera; wherein, after the speed measurement unit measures the running speed of the strip, the PLC controller calculates the shooting frequency according to the running speed of the strip and the parameters of the multi-line structured light projected by the multi-line structured light source; the multi-line structured light source projects the multi-line structured light to the surface of the strip vertically to the roller way plane and the strip running direction; the industrial area array camera collects the strip surface image containing the multi-line structured light according to the shooting frequency calculated by the PLC controller, and transmits the collected image to the image processing server; wherein, the optical axis of the industrial area array camera and the line structured light plane projected by the multi-line structured light source form a preset included angle; when the tail of the strip runs to the position of the industrial area array camera, the PLC controller turns off the multi-line structured light source and the industrial area array camera. The image processing server is used for calculating the flatness and width of a plurality of positions in the full length range of the strip based on the image collected by the industrial area array camera and in combination with the camera calibration result.

2. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The multi-line structured light-based strip flatness and width comprehensive detection device further comprises a mounting platform; the mounting platform spans the strip running roller way and is installed directly above the strip running roller way; the industrial area array camera and the multi-line structured light source are installed inside the mounting platform.

3. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The multi-line structured light-based strip flatness and width comprehensive detection device further comprises a display; the display is in communication connection with the image processing server; after the image processing server calculates the flatness and width of a plurality of positions in the full length range of the strip based on the image collected by the industrial area array camera and in combination with the camera calibration result, the display is used for displaying the calculation result of the image processing server.

4. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The multi-line structured light-based strip flatness and width comprehensive detection device further comprises a water cooling device; the industrial area array camera and the multi-line structured light source are connected with the water cooling device; the water cooling device is used for cooling the industrial area array camera and the multi-line structured light source.

5. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The number of line structured light lines projected by the multi-line structured light source is not less than 3.

6. The multi-line structured light based strip flatness and width integrated detection device according to claim 5, wherein, The light planes of each line structure light projected by the multi-line structured light source are parallel to each other, and the distance between the light planes of any two adjacent line structure lights is equal.

7. The multi-line structured light based strip flatness and width integrated detection device according to claim 6, wherein, The distance between the light planes of the two adjacent line structure lights is 30-300 mm.

8. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The preset included angle is 20-70 degrees, and the shooting field of view of the camera covers all the line structure lights.

9. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The calculation formula of the shooting frequency is: Wherein, η represents the shooting frequency; v represents the running speed of the strip; l represents the distance between the light planes of the two adjacent line structure lights; and m represents the number of line structure light lines projected by the multi-line structured light source.

10. The multi-line structured light based strip flatness and width integrated detection device according to claim 1, wherein, The image processing server is specifically used for: Firstly, a threshold segmentation algorithm is used to extract the region of interest from the image collected by the industrial area array camera; secondly, based on the extracted region of interest, the sub-pixel precision line structure light center line coordinates are extracted by a Gaussian operator; then the endpoint coordinates of the intersection of the line structure light and the two sides of the strip are obtained by edge point recognition, and the width of the strip is calculated; finally, the wave height and the flatness of the strip are calculated according to the line coordinates in the plurality of line structure lights.

Images