Display screen detection system and display screen detection method

Abstract

The invention discloses a display screen detection system and a display screen detection method, relates to the technical field of display screen detection, and aims to solve the problem of display screen color detection.The display screen detection system comprises a control module, the control module is electrically connected with a processing module, and the processing module is electrically connected with a driving module; the driving module is electrically connected with an adjusting mechanism, and the adjusting mechanism is provided with an industrial camera. The processing module is electrically connected with a calculation model, and the calculation model is used for calculating the collected display screen images, including pixel center distance relative deviation, horizontal relative dislocation and vertical relative dislocation. According to the display screen detection system and the display screen detection method provided by the invention, the processing module is used for preprocessing, and the calculation model is used for calculating the pixel center distance relative deviation, the horizontal relative dislocation and the vertical relative dislocation; and the display screens are sorted through the PID control module.

Description

Technical Field

[0001] The invention belongs to the technical field of display screen detection, and in particular relates to a display screen detection system and a display screen detection method. Background Art

[0002] A display screen is a device that converts electronic signals into visual images, also known as a display or monitor. It is commonly used on computers, televisions, mobile phones, tablets and other devices to display text, images, videos and other content. The main components of a display screen include a display panel, a control circuit and a housing. Among them, the display panel is the most important component. It consists of many small optoelectronic components, and the brightness and color of the pixels are controlled by the switching of these components to form an image. Different types of display screens use different types of panel technologies, such as liquid crystal display (LCD), organic light-emitting diode (OLED), etc. The control circuit is responsible for receiving and processing input signals and converting them into signals suitable for the display panel. The housing plays a protective and supporting role. Depending on the application scenarios and requirements, display screens can be divided into many types, such as laptop screens, desktop computer screens, tablet screens, mobile phone screens, etc. At the same time, there are also many different forms and sizes to choose from in terms of design. With the continuous development of display technology, more and more display products have appeared on the market, and the quality issues of these products have also attracted more and more attention. For display screens, the display color of the display is particularly important. However, there are still various problems in the color detection of various display screens on the market.

[0003] For example, a display screen detection system and a display screen detection method disclosed in the authorization announcement number 202310772461.X, although it realizes the detection of the display screen in an automated manner, it can greatly improve production efficiency and reduce the errors and time costs caused by manual operation. The use of advanced detection technology and algorithms can more accurately detect problems in the display screen, thereby improving product quality. By automatically detecting the display screen, labor costs and material costs can be reduced, and problems can be discovered and repaired in a timely manner, avoiding later maintenance costs. The use of advanced technology and algorithms to detect the display screen can evaluate the display screen more comprehensively, thereby enhancing its reliability and stability. By ensuring that each display screen meets the specification requirements and has no problems, a better user experience and satisfaction can be provided, but it does not solve the problem that the existing display screen is prone to color problems when in use, and the problems of relative deviation of pixel center distance, vertical relative misalignment and horizontal relative misalignment of the picture are not detected, making the display screen display not accurate and clear enough. Summary of the invention

[0004] The object of the present invention is to provide a display screen detection system and a display screen detection method to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a display screen detection system, comprising a control module, the control module is electrically connected to a processing module, the processing module is electrically connected to a driving module, the driving module is electrically connected to an adjusting mechanism, an industrial camera is installed on the adjusting mechanism, the industrial camera is used to shoot the screen of the display screen, and the adjusting mechanism is used to adjust the position of the industrial camera, control the industrial camera to perform movement adjustment, and realize lifting and lowering adjustment control, shoot the center position of the display screen, and realize focus adjustment, the driving module is used to control the adjustment mechanism to operate, the processing module is used to pre-process the instruction information transmitted by the control module and the screen shot by the industrial camera, the control module is used to control and adjust the display screen detection system, and issue control instructions to the processing module; The processing module includes a calculation model, which is used to calculate the display screen image collected by the industrial camera, and the calculation detection items include relative deviation of pixel center distance, horizontal relative misalignment and vertical relative misalignment; The calculation of the relative deviation of the pixel center distance is as follows: Get all the pixel center points of the display screen, select the center pixel point as the reference point, and calculate the relative error J between the measured center distance and the nominal center distance between any adjacent pixels in the display screen x , and the calculation formula is as follows: J x =|Z C -Z B | / 40×1g(Z B / 2)×100%, Among them, J x is the relative deviation of pixel center distance, Z C is the measured pixel center distance, Z B is the nominal pixel center distance; The vertical relative misalignment is calculated as follows: C c =D cc / 40×1g(Z B / 2)×100%, Among them, C c is the vertical relative displacement, D cc is the measured vertical misalignment value, Z B is the nominal pixel center distance; The horizontal relative misalignment is calculated as follows: C s =Dsc / 40×1g(Z B / 2)×100%, Among them, C s is the horizontal relative displacement, D sc is the measured horizontal misalignment value, Z B is the nominal pixel center distance.

[0006] Furthermore, the calculation model is electrically connected to a PID control module, the PID control module is electrically connected to a grading mechanism, the grading mechanism is electrically connected to the driving module, the PID control module drives the grading mechanism to sort the display screen according to the calculation results of the calculation model, and the grading mechanism is jointly controlled and adjusted by the driving module and the PID control module.

[0007] Furthermore, the calculation formula of the PID control module is as follows: The mathematical expression of the PID control module is: Where K p is the proportional gain, e(t) is the deviation number, U(t) is the controlled output, K I is the integral gain, K D is the differential gain; e(t) is calculated as follows: e(t)=T1-T2, where T1 is the set level parameter and T2 is the actually calculated level parameter.

[0008] Further, the grading standards of the relative deviation of the pixel center distance, the vertical relative misalignment and the horizontal relative misalignment; The grading standards for the relative deviation of the pixel center distance include the first level: 7.5% < J x ≤10%, second level: 5%<J x ≤7.5%, third level: J x ≤5%; The grading standards for vertical relative misalignment include the first level: 7.5% < C c ≤10%, second level: 5%<C c ≤7.5%, third level: C c ≤5%; The grading standards for horizontal relative misalignment include the first level: 7.5% < C s ≤10%, second level: 5%<C s ≤7.5%, third level: C s ≤5%.

[0009] Furthermore, the control module is electrically connected to a database, the database is used to input various parameters of the display screen, and the control module detects the display screen according to the various parameters; The control module is electrically connected to an auxiliary module, which includes a mouse and keyboard, a display and an alarm system. The mouse and keyboard and the display are used to assist the display screen detection system in operating, enter various parameters of the display screen detection and operating parameters of the display screen detection system, and display various detection results of the display screen. The alarm system is used to warn when an abnormal situation occurs in the display screen detection, and the alarm system uses an audible and visual alarm.

[0010] Furthermore, the driving module is electrically connected to a conveying mechanism, which is used to convey the display screen, and during the conveying process, the position of the industrial camera is controlled and adjusted by the adjusting mechanism, so that the industrial camera can shoot and detect the display screen.

[0011] Furthermore, the processing module includes a receiving unit for acquiring data information collected by the industrial camera, a conversion unit for performing analog-to-digital conversion on the data information, a gain unit for amplifying the data information, a filtering unit for filtering out clutter from the data information, and an extraction unit for extracting features from the data information.

[0012] Furthermore, the filtering unit uses a guided filtering denoising method to process the image information collected by the industrial camera. The calculation formula of the guided filtering denoising method is: Where qi is the value of the output image; I is the value of the input image, (a k ,b k ) is the coefficient when the window is located at k; I is the image to be filtered or the guide image; In order to minimize the difference between the output image q and the input image p, the value of the following formula is minimized: In the formula, the input image p is the image to be filtered; ∈ is the regularization parameter used to prevent a k Too large, according to the formula Get coefficient a k , b k The expression is: In the formula, μ k and σ k 2 is the mean and variance of the input image I when the window is located at k; |w| is the number of pixels when the window is located at k; is the mean of the input image p.

[0013] Furthermore, the extraction unit is used to extract the features of the picture to determine the center point of the pixel, and the convolution kernel is set to 2×2, and the sliding stride of the convolution kernel in the input matrix is ​​2, and the number of zero-padding layers is set to q, and the number of zero-padding layers is adjusted according to the size of the convolution kernel, the stride, and the size of the input matrix, so that the convolution kernel slides to the edge and keeps the sliding stride greater than the size of the convolution kernel; Assuming the input matrix size is w, the convolution kernel size is v, the stride is s, and the number of zero-padding layers is q, the formula for calculating the size of the feature map generated after convolution is: Where w' is the feature map size.

[0014] A display screen detection method comprises the following steps: S1. Operation of system equipment: The control module is powered by the city power grid, so that the control module issues an operation instruction, and the operation instruction is transmitted to the drive module through the processing module, and the drive module transports the display screen through the conveying mechanism; S2. Adjusting the industrial camera: When the display screen is being transported, the control module controls the adjustment mechanism through the drive module, so that the adjustment mechanism can adjust the industrial camera to be close to the display screen and achieve focus to complete the shooting of the display screen; S3, data transmission preprocessing: after the industrial camera shoots the picture, the data information is transmitted and preprocessed through the processing module to receive, convert, filter, amplify and extract features of the shot picture, and obtain the pixel center point in the data information collected by the industrial camera; S4, the calculation model performs calculation processing: after the data information collected by the industrial camera is preprocessed, the calculation model performs calculation processing on the relative deviation of the pixel center distance, the vertical relative misalignment and the horizontal relative misalignment of the data information collected by the industrial camera, and sorts the display screen after the calculation processing; S5. Sorting of display screens: After the calculation and processing, the calculation model transmits a signal to the grading mechanism through the PID control module, so that the grading mechanism can perform three-level sorting processing on the display screens, thereby realizing sorting of the display screens respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, since the control module is electrically connected to the processing module, and the processing module is electrically connected to the driving module, and the driving module can control the adjusting mechanism to act, the entire system can be controlled and adjusted through the control module, and the automatic operation of the system can be improved. The display screen is transported by the conveying mechanism, and during the transportation, the position of the industrial camera is adjusted by the adjusting mechanism. Since the adjusting mechanism can perform movement adjustment and focus adjustment on the industrial camera, the industrial camera can complete the shooting of the display screen. In addition, since the processing module is used to pre-process the instruction information transmitted by the control module and the picture shot by the industrial camera, Therefore, the present invention can pre-process the captured picture through the processing module, improve the accuracy of data information, and facilitate subsequent calculation and processing. The processing module extracts features of the pixel center point of the picture, which is convenient for analysis and calculation based on the pixel center point, and is convenient for calculating the relative deviation of the pixel center distance, the horizontal relative misalignment and the vertical relative misalignment, so as to complete the detection of the color pixels of the display screen. After the display screen is detected, the present invention uses the PID control module to sort the display screen, that is, compares the parameters calculated according to the set parameter standard and the calculation model, and then the PID control module controls and adjusts the grading mechanism, so that the grading mechanism can perform three-level sorting processing on the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a display screen detection system provided by the present invention; Figure 2 A schematic flow chart of the steps of a display screen detection method provided by the present invention. DETAILED DESCRIPTION

[0017] 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.

[0018] Example 1 See also Figure 1The present invention provides a technical solution: a display screen detection system, including a control module, a processing module electrically connected to the control module, a driving module electrically connected to the processing module, an adjusting mechanism electrically connected to the driving module, an industrial camera installed on the adjusting mechanism, the industrial camera is used to shoot the screen of the display screen, and the adjusting mechanism is used to adjust the position of the industrial camera, control the industrial camera to move and adjust, and realize lifting and lowering adjustment control, shoot the center position of the display screen, and realize focus adjustment, the driving module is used to control the adjustment mechanism to operate, the processing module is used to pre-process the instruction information transmitted by the control module and the screen shot by the industrial camera, the control module is used to control and adjust the display screen detection system, and issue control instructions to the processing module; wherein the processing module includes a calculation model, the calculation model is used to calculate the display screen screen collected by the industrial camera, and the calculation detection items include pixel center distance relative deviation, horizontal relative misalignment and vertical relative misalignment. By calculating the pixel center distance relative deviation, horizontal relative misalignment and vertical relative misalignment, as much and reliable data as possible can be obtained, thereby constructing a calculation model with small difference.

[0019] refer to Figure 1 and Figure 2 , wherein the calculation of the relative deviation of the pixel center distance in this embodiment is as follows: Get all the pixel center points of the display screen, select the center pixel point as the reference point, and calculate the relative error J between the measured center distance and the nominal center distance between any adjacent pixels in the display screen x , and the calculation formula is as follows: J x =|Z C -Z B | / 40×1g(Z B / 2)×100%, Among them, J x is the relative deviation of pixel center distance, Z C is the measured pixel center distance, Z B is the nominal pixel center distance; The vertical relative misalignment is calculated as follows: C c =D cc / 40×1g(Z B / 2)×100%, Among them, C c is the vertical relative displacement, D cc is the measured vertical misalignment value, Z B is the nominal pixel center distance; The horizontal relative misalignment is calculated as follows: C s =D sc / 40×1g(ZB / 2)×100%, Among them, C s is the horizontal relative displacement, D sc is the measured horizontal misalignment value, Z B is the nominal pixel center distance.

[0020] refer to Figure 1 and Figure 2 In order to realize the grading and sorting processing of the display screen and complete the sorting work through automatic control and adjustment, in this embodiment, preferably, the calculation model is electrically connected to a PID control module, the PID control module is electrically connected to a grading mechanism, the grading mechanism is electrically connected to the driving module, the PID control module drives the grading mechanism to sort the display screen through the calculation results of the calculation model, and the grading mechanism is jointly controlled and adjusted by the driving module and the PID control module.

[0021] refer to Figure 1 and Figure 2 In order to realize automatic adjustment and control of the sorting display screen and facilitate parameter calculation processing, in this embodiment, preferably, the calculation formula of the PID control module is as follows: The mathematical expression of the PID control module is: Where K p is the proportional gain, e(t) is the deviation number, U(t) is the controlled output, K I is the integral gain, K D is the differential gain; e(t) is calculated as follows: e(t)=T1-T2, where T1 is the set level parameter and T2 is the actually calculated level parameter.

[0022] refer to Figure 1 and Figure 2 In order to set the three-level sorting parameters of the display screen and facilitate sorting according to the parameters, in this embodiment, the grading standards of relative deviation of pixel center distance, vertical relative misalignment and horizontal relative misalignment are preferably used; The grading standards for the relative deviation of pixel center distance include the first level: 7.5% < J x ≤10%, second level: 5%<J x ≤7.5%, third level: J x ≤5%; The grading standards for vertical relative misalignment include the first level: 7.5% < C c ≤10%, second level: 5%<C c ≤7.5%, third level: C c ≤5%; The grading standards for horizontal relative misalignment include the first level: 7.5% < C s ≤10%, second level: 5%<C s ≤7.5%, third level: C s ≤5%.

[0023] refer to Figure 1 and Figure 2 In order to store various parameters of the display screen, facilitate detection and comparison, and realize auxiliary operation of the system, in this embodiment, preferably, the control module is electrically connected to a database, the database is used to enter various parameters of the display screen, and the control module detects the display screen according to the various parameters; in order to facilitate the detection of the control module, an auxiliary module is electrically connected to the control module, the auxiliary module includes a mouse and keyboard, a display and an alarm system, the mouse and keyboard and the display are used to assist the display screen detection system in operating and running, enter various parameters of the display screen detection and the operating parameters of the display screen detection system, and display various detection results of the display screen, the alarm system is used to warn when an abnormal situation occurs in the display screen detection, and the alarm system uses an audible and visual alarm.

[0024] refer to Figure 1 and Figure 2 In order to realize the automatic transportation of the display screen, facilitate the adjustment of the distance of the industrial camera, and realize the shooting of the display screen, in this embodiment, preferably, the driving module is electrically connected with a conveying mechanism, the conveying mechanism is used to transport the display screen, and during the transportation process, the position of the industrial camera is controlled and adjusted by the adjustment mechanism, so that the industrial camera shoots and detects the display screen. In order to realize the preprocessing of the pictures taken by the industrial camera and improve the accuracy of the data, in this embodiment, preferably, the processing module includes a receiving unit for acquiring the data information collected by the industrial camera, a conversion unit for performing analog-to-digital conversion on the data information, a gain unit for amplifying the data information, a filtering unit for filtering out clutter on the data information, and an extraction unit for extracting features from the data information.

[0025] refer to Figure 1 and Figure 2 In order to filter the image information and improve the clarity of the image information, in this embodiment, preferably, the filtering unit uses a guided filtering denoising method to process the image information collected by the industrial camera. The calculation formula of the guided filtering denoising method is: Where qi is the value of the output image; I is the value of the input image, (a k ,b k ) is the coefficient when the window is located at k; I is the image to be filtered or the guide image; In order to minimize the difference between the output image q and the input image p, the value of the following formula is minimized: In the formula, the input image p is the image to be filtered; ∈ is the regularization parameter used to prevent a k Too large, according to the formula Get coefficient a k , b k The expression is: In the formula, μ k and σ k 2 is the mean and variance of the input image I when the window is located at k; |w| is the number of pixels when the window is located at k; is the mean of the input image p.

[0026] refer to Figure 1 and Figure 2 In order to extract the features of the image and obtain the center point of the pixel, in this embodiment, preferably, the extraction unit is used to extract the features of the image to determine the center point of the pixel, and the convolution kernel is set to 2×2, and the sliding stride of the convolution kernel in the input matrix is ​​2, and the number of zero-filling layers is set to q, and the number of zero-filling layers is adjusted according to the size of the convolution kernel, the stride, and the size of the input matrix, so that the convolution kernel slides to the edge and keeps the sliding stride greater than the size of the convolution kernel; Assuming the input matrix size is w, the convolution kernel size is v, the stride is s, and the number of zero-padding layers is q, the formula for calculating the size of the feature map generated after convolution is: Where w' is the feature map size.

[0027] refer to Figure 1 and Figure 2When the present invention is in use, since the control module is electrically connected to the processing module, and the processing module is electrically connected to the driving module, and the driving module can control the adjusting mechanism to act, the entire system can be controlled and adjusted through the control module, and the automatic operation of the system can be improved. The display screen is transported by the conveying mechanism, and during the transportation, the position of the industrial camera is adjusted by the adjusting mechanism. Since the adjusting mechanism can move and focus the industrial camera, the industrial camera can complete the shooting of the display screen. In addition, since the processing module is used to pre-process the command information transmitted by the control module and the picture shot by the industrial camera, Therefore, the present invention can pre-process the captured picture through the processing module, improve the accuracy of data information, and facilitate subsequent calculation and processing. The processing module extracts features of the pixel center point of the picture, which is convenient for analysis and calculation based on the pixel center point, and is convenient for calculating the relative deviation of the pixel center distance, the horizontal relative misalignment and the vertical relative misalignment, so as to complete the detection of the color pixels of the display screen. After the display screen is detected, the present invention uses the PID control module to sort the display screen, that is, compares the parameters calculated according to the set parameter standard and the calculation model, and then the PID control module controls and adjusts the grading mechanism, so that the grading mechanism can perform three-level sorting processing on the display screen.

[0028] Example 2 refer to Figure 1 and Figure 2, which is different from Example 1, is that this embodiment further provides a display screen detection method, including the following steps: S1, operation of system equipment: power is supplied to the control module through the city power grid, so that the control module issues an operation instruction, and the operation instruction is transmitted to the drive module through the processing module, and the drive module transports the display screen through the conveying mechanism; S2, adjusting the industrial camera: when the display screen is transported, the control module controls the adjustment mechanism through the drive module, so that the adjustment mechanism can adjust the industrial camera to be close to the display screen, and realize the focus, and complete the shooting of the display screen; S3, data transmission preprocessing: after the industrial camera shoots the picture, the data information is transmitted through the processing module Transmission and preprocessing, to receive, convert, filter, amplify and extract features of the captured images, and obtain the pixel center points in the data information collected by the industrial camera; S4, the calculation model performs calculation processing: after the preprocessing of the data information collected by the industrial camera, the calculation model performs calculation processing on the relative deviation of the pixel center distance, the vertical relative misalignment and the horizontal relative misalignment of the data information collected by the industrial camera, and sorts the display screen after calculation processing; S5, sorting of the display screen: after the calculation processing, the calculation model transmits signals to the grading mechanism through the PID control module, so that the grading mechanism can perform three levels of sorting processing on the display screen, and sort the display screen respectively. Through the above steps, the detection and classification of the display screen can be quickly realized, and the detection error is small.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A display screen detection system, comprising a control module, characterized in that: The control module is electrically connected to a processing module, the processing module is electrically connected to a driving module, the driving module is electrically connected to an adjusting mechanism, an industrial camera is installed on the adjusting mechanism, the industrial camera is used to shoot the screen of the display screen, and the adjusting mechanism is used to adjust the position of the industrial camera, control the industrial camera to move and adjust, and realize lifting and lowering adjustment control, shoot the center position of the display screen, and realize focus adjustment, the driving module is used to control the adjustment mechanism to operate, the processing module is used to pre-process the instruction information transmitted by the control module and the screen shot by the industrial camera, the control module is used to control and adjust the display screen detection system, and issue control instructions to the processing module; The processing module includes a calculation model, which is used to calculate the display screen image collected by the industrial camera, and the calculation detection items include relative deviation of pixel center distance, horizontal relative misalignment and vertical relative misalignment; The calculation of the relative deviation of the pixel center distance is as follows: Get all the pixel center points of the display screen, select the center pixel point as the reference point, and calculate the relative error J between the measured center distance and the nominal center distance between any adjacent pixels in the display screen x , and the calculation formula is as follows: J x =|From C -WITH B | / 40×1g(Z B / 2)×100%, Among them, J x is the relative deviation of pixel center distance, Z C is the measured pixel center distance, Z B is the nominal pixel center distance; The vertical relative misalignment is calculated as follows: C c =D cc / 40×1g(Z B / 2)×100%, Among them, C c is the vertical relative displacement, D cc is the measured vertical misalignment value, Z B is the nominal pixel center distance; The horizontal relative misalignment is calculated as follows: C s =D sc / 40×1g(Z B / 2)×100%, Among them, C s is the horizontal relative displacement, D sc is the measured horizontal misalignment value, Z B is the nominal pixel center distance.

2. A display screen detection system according to claim 1, characterized in that: The calculation model is electrically connected to a PID control module, the PID control module is electrically connected to a grading mechanism, the grading mechanism is electrically connected to the driving module, the PID control module drives the grading mechanism to sort the display screen according to the calculation results of the calculation model, and the grading mechanism is jointly controlled and adjusted by the driving module and the PID control module.

3. A display screen detection system according to claim 2, characterized in that: The calculation formula of the PID control module is as follows: The mathematical expression of the PID control module is: Where K p is the proportional gain, e(t) is the deviation number, U(t) is the controlled output, K I is the integral gain, K D is the differential gain; e(t) is calculated as follows: e(t)=T1-T2, where T1 is the set level parameter and T2 is the actually calculated level parameter.

4. A display screen detection system according to claim 3, characterized in that: The grading standards of the relative deviation of the pixel center distance, the vertical relative misalignment and the horizontal relative misalignment; The grading standards for the relative deviation of the pixel center distance include the first level: 7.5% < J x ≤10%, second level: 5%<J x ≤7.5%, third level: J x ≤5%; The grading standards for vertical relative misalignment include the first level: 7.5% < C c ≤10%, second level: 5%<C c ≤7.5%, third level: C c ≤5%; The grading standards for horizontal relative misalignment include the first level: 7.5% < C s ≤10%, second level: 5%<C s ≤7.5%, third level: C s ≤5%.

5. A display screen detection system according to claim 1, characterized in that: The control module is electrically connected to a database, the database is used to input various parameters of the display screen, and the control module detects the display screen according to the various parameters; The control module is electrically connected to an auxiliary module, which includes a mouse and keyboard, a display and an alarm system. The mouse and keyboard and the display are used to assist the display screen detection system in operating, enter various parameters of the display screen detection and operating parameters of the display screen detection system, and display various detection results of the display screen. The alarm system is used to warn when an abnormal situation occurs in the display screen detection, and the alarm system uses an audible and visual alarm.

6. A display screen detection system according to claim 1, characterized in that: The driving module is electrically connected with a conveying mechanism, which is used to convey the display screen. During the conveying process, the position of the industrial camera is controlled and adjusted by the adjusting mechanism, so that the industrial camera can shoot and detect the display screen.

7. A display screen detection system according to claim 1, characterized in that: The processing module includes a receiving unit for acquiring data information collected by the industrial camera, a conversion unit for performing analog-to-digital conversion on the data information, a gain unit for amplifying the data information, a filtering unit for filtering out clutter from the data information, and an extraction unit for extracting features from the data information.

8. A display screen detection system according to claim 7, characterized in that: The filtering unit uses a guided filtering denoising method to process the image information collected by the industrial camera. The calculation formula of the guided filtering denoising method is: Where qi is the value of the output image; I is the value of the input image, (a k ,b k ) is the coefficient when the window is located at k; I is the image to be filtered or the guide image; In order to minimize the difference between the output image q and the input image p, the value of the following formula is minimized: In the formula, the input image p is the image to be filtered; ∈ is the regularization parameter used to prevent a k Too large, according to the formula Get coefficient a k , b k The expression is: In the formula, μ k and σ k 2 is the mean and variance of the input image I when the window is located at k; |w| is the number of pixels when the window is located at k; is the mean of the input image p.

9. A display screen detection system according to claim 7, characterized in that: The extraction unit is used to extract the features of the picture to determine the center point of the pixel. The convolution kernel is set to 2×2, and the sliding stride of the convolution kernel in the input matrix is ​​2, and the number of zero-padding layers is set to q. The number of zero-padding layers is adjusted according to the size of the convolution kernel, the stride, and the size of the input matrix so that the convolution kernel slides to the edge and the sliding stride is kept larger than the size of the convolution kernel. Assuming the input matrix size is w, the convolution kernel size is v, the stride is s, and the number of zero-padding layers is q, the formula for calculating the size of the feature map generated after convolution is: Where w' is the feature map size.

10. A display screen detection method, characterized in that: The following steps are included: S1. Operation of system equipment: The control module is powered by the city power grid, so that the control module issues an operation instruction, and the operation instruction is transmitted to the drive module through the processing module, and the drive module transports the display screen through the conveying mechanism; S2. Adjusting the industrial camera: When the display screen is being transported, the control module controls the adjustment mechanism through the drive module, so that the adjustment mechanism can adjust the industrial camera to be close to the display screen and achieve focus to complete the shooting of the display screen; S3, data transmission preprocessing: after the industrial camera shoots the picture, the data information is transmitted and preprocessed through the processing module to receive, convert, filter, amplify and extract features of the shot picture, and obtain the pixel center point in the data information collected by the industrial camera; S4, the calculation model performs calculation processing: after the data information collected by the industrial camera is preprocessed, the calculation model performs calculation processing on the relative deviation of the pixel center distance, the vertical relative misalignment and the horizontal relative misalignment of the data information collected by the industrial camera, and sorts the display screen after the calculation processing; S5. Sorting of display screens: After the calculation and processing, the calculation model transmits a signal to the grading mechanism through the PID control module, so that the grading mechanism can perform three-level sorting processing on the display screens, thereby realizing sorting of the display screens respectively.

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