Fault detection system for display screen production

Abstract

The invention relates to the field of fault detection for display screen production, in particular to a fault detection system for display screen production, which comprises a personnel login module, a data acquisition module, an electrical parameter analysis and detection module, a signal analysis module, a control processing module and a remote monitoring module, the data acquisition module determines fault characteristics of a signal source, the electrical parameter analysis and detection module receives data information sent by the data acquisition module and analyzes electrical parameter faults of the LED display screen, and the remote monitoring module monitors damage to the outer surface of the display screen according to a high-definition camera and removes the LED display screen with damage flaws. The invention aims to realize real-time, comprehensive and accurate testing of electrical parameters, signals and appearance flaws, timely discover potential fault risks and improve production quality and efficiency.

Description

Technical Field

[0001] The invention relates to the field of fault detection for display screen production, and in particular to a fault detection system for display screen production. Background Art

[0002] With the continuous development of science and technology, LED display screens are more and more widely used in various fields, such as advertising, stage performances, traffic instructions and information release. LED display screens have the advantages of high brightness, high contrast, bright colors, energy saving and environmental protection, but their production process is complicated, involving multiple links and technologies, and are prone to various faults.

[0003] In the traditional production of LED display screens, fault detection mainly relies on manual visual inspection and simple instrument testing. Manual visual inspection is inefficient, prone to missed detection and false detection, and requires high experience and skills of the inspectors. Traditional detection methods can no longer meet the needs of modern LED display screen production, and a more efficient, accurate and comprehensive fault detection system is needed. In addition, with the development of emerging technologies such as artificial intelligence and cloud computing, new ideas and methods are provided for LED display screen fault detection. Nowadays, the present invention detects various faults of the display screen comprehensively by detecting electrical parameters, signal faults and appearance defects, and handles various faults separately. In summary, in order to improve the production quality and efficiency of LED display screens, reduce production costs, and meet the market demand for high-quality display screens, it is of great practical significance to develop a new type of fault detection system for display screen production. Summary of the invention

[0004] In order to solve the technical problems raised by the above background technology, the present invention provides a fault detection system for display screen production.

[0005] The purpose of the present invention can be achieved through the following technical solutions: The present invention is a fault detection system for display screen production, comprising a personnel login module, a data acquisition module, an electrical parameter analysis and detection module, a signal analysis module, a control processing module, a remote monitoring module and a data center.

[0006] The personnel login module is used to authenticate the biometric information of the staff. If the authentication is successful, the corresponding matching detection production line will be opened. The specific acquisition process is as follows: The output end of the personnel login module is connected to the input end of the data center. Each staff member sends personal information to the data center through the personnel login module. The personal information includes name, ID number and fingerprint image. The data center receives the personal information, divides the personal information into a personal information set, and marks the person corresponding to the personal information set as a certified person, obtains the control terminal of each LED display detection production line, and matches the control terminal of each LED display detection production line with the personal information of each certified person. The control terminal of an LED display detection production line corresponds to the personal information of one certified person. The certified person captures the fingerprint screenshot information of the current certified person through a mobile phone terminal, extracts the fingerprint image corresponding to the data center, and matches the fingerprint screenshot information of the current certified person with the fingerprint image. If the match is successful, the user enters the control terminal operation interface of the production line corresponding to the certified person. If the match fails, the user exits the information interface of the mobile phone terminal. The personnel login module determines that the current person is not a certified person and generates an abnormal signal and sends it to the sound and light alarm device. The sound and light alarm device receives the abnormal signal and sends a reminder alarm.

[0007] The data acquisition module collects information from each LED display screen on the production line based on each sensor. The specific acquisition process is as follows: The output end of the data acquisition module is connected to the input end of the electrical parameter analysis and detection module. The current data information of each LED display screen is collected in real time through the current sensor to obtain the current parameter value of each LED display screen; the voltage data information of each part of each LED display screen is collected in real time through the voltage sensor to obtain the voltage parameter value of each LED display screen; the resistance data information of the circuit in each LED display screen is collected in real time through the resistance measuring instrument to obtain the resistance parameter value of the LED display screen; the obtained current parameter value and voltage parameter value are sent to the electrical parameter analysis and detection module.

[0008] The electrical parameter analysis and detection module receives the data information sent by the data acquisition module and analyzes the electrical parameter fault of the LED display. The specific acquisition process is as follows: The output end of the electrical parameter analysis and detection module is connected to the data processing module, and the input end of the electrical parameter analysis and detection module is connected to the output end of the data center, and all line positions of the LED display screen to be detected are obtained, and all line positions are equally divided into several line distances, and the preset line detection time zone of current and voltage is set for the LED display screen to be detected, and the preset line detection time zone is divided into several preset line time zones, and several line distances are matched with several preset line time zones. One line distance corresponds to one preset line time zone, which is marked as a preset distance monitoring time zone, and each voltage parameter value and each current parameter value of the preset distance monitoring time zone are obtained, and each voltage parameter value is divided by the corresponding current parameter value to obtain each resistance parameter value of the preset distance monitoring time zone, and each resistance parameter value is averaged to obtain the average resistance value, which is marked as , arrange the obtained resistance parameter values ​​from small to large, obtain the maximum resistance value and the minimum resistance value, and mark the maximum resistance value as , subtract the minimum resistance value from the maximum resistance value to get the maximum resistance difference value, marked as , calculate the obtained resistance average value, maximum resistance value and maximum resistance difference value, and use the formula The resistance operating value DTI is obtained, where F1, F2 and F3 are preset proportional coefficients, the preset resistance operating threshold of the data center is extracted, and the actual resistance operating value is compared with the preset resistance operating threshold. If the actual resistance operating value is greater than the preset resistance operating threshold, a resistance abnormality signal is generated and sent to the control processing module.

[0009] The signal analysis module obtains the signal source of the LED display screen and determines the fault characteristics of the signal source. The specific acquisition process is as follows: The output end of the signal analysis module is connected to the control processing module, and the input end of the signal analysis module is connected to the output end of the data center. A signal receiver is installed in the LED display screen, and a signal generator is installed on the detection production line of the LED display screen. The production line detection terminal sends a signal test instruction to the signal receiver of the detection production line. The signal receiver of the detection production line receives the signal test instruction, obtains the position information of the LED display screen to be detected, matches the signal receiver and the signal generator of the LED display screen to be detected, and generates a matching completion signal if the match is successful and sends it to the production line detection terminal. The production line detection terminal receives the matching completion signal and sends a test file to the signal generator. The signal generator receives the test file and sends it to the matching LED display signal receiver. The sending speed and sending duration of the signal generator sending the test file to the LED display signal receiver are obtained, and the average sending speed is obtained according to the sending speed and sending duration, which is marked as , yi is represented as the average value, and then the receiving download speed and receiving time of the display signal receiver are obtained. According to the receiving download speed and receiving time, the average receiving speed is obtained, which is marked as , obtain the corresponding positioning according to the position information of the LED display screen to be detected, connect the positioning of the LED display screen and the signal generator, and obtain the signal test distance, marked as , set the preset signal strength of the signal area to , calculate the obtained average sending speed, average receiving speed, preset signal strength and signal test distance, and use the formula The signal transmission value FG is obtained, wherein G1, G2, G3 and G4 are preset proportional coefficients, i represents the number of the LED display screen, i=1, 2, ..., n; n represents the total number of LED display screens, and the preset signal transmission threshold of the data center is extracted. The preset signal transmission threshold is compared with the actual signal transmission value. If the actual signal transmission value is less than the preset signal transmission threshold, a fault signal is generated and sent to the control processing module.

[0010] The control processing module processes the display screen faults according to the received signals. The specific acquisition process is as follows: The output end of the control processing module is connected to the input end of the data center, and a resistance abnormality signal is received to obtain the location of the corresponding LED display screen. The circuits of the LED display screen are divided into several circuit segments, and each circuit segment is tested by a resistance tester to obtain each resistance value. The resistance threshold preset by the data center is extracted, and each resistance value obtained by each circuit segment is compared with the preset resistance threshold. If the resistance value of a circuit segment is greater than the preset resistance threshold, the LED display screen is marked as a short-circuited display screen and is scrapped.

[0011] After receiving a fault signal, the location of the corresponding faulty LED display screen is obtained, and the LED display screen is marked as a target display screen. With the target display screen as a dot, the location of the mobile terminal of each maintenance personnel within the radius is obtained, and the target display screen and the location of the mobile terminal of each maintenance personnel are connected to obtain each maintenance distance value, and each maintenance distance value is arranged from small to large, and the minimum distance value is selected, and the maintenance personnel corresponding to the minimum distance value is marked as the preferred maintenance personnel, and the control processing module generates a processing signal and sends it to the preferred maintenance personnel, and the preferred maintenance personnel receives the signal and repairs the LED display screen.

[0012] The remote monitoring module monitors the damage on the outer surface of the display screen using a high-definition camera and removes the LED display screens with damage and defects. The specific acquisition process is as follows: A high-definition camera is installed on the detection production line. If the LED display screen to be detected has no abnormal circuit and signal conditions, an appearance inspection signal is generated and sent to the high-definition camera. After receiving the appearance inspection signal, the high-definition camera performs all-round image acquisition on the appearance of the LED display screen to be detected, and obtains images of the LED display screen corresponding to each direction. The images of the LED display screen to be detected are subjected to image enhancement processing to obtain increased images in each direction, and the concave-convex area and gap area of ​​the enhanced images in each direction are extracted. The concave-convex area and gap area of ​​the enhanced images in each direction are analyzed to obtain the appearance defect value of the LED display screen, and the preset appearance defect threshold of the data center is extracted. If the appearance defect value of the LED display screen is greater than the preset appearance defect threshold, the LED display screen is marked as a defective device, and a defect signal is generated and sent to the production line detection terminal. The production line detection terminal receives the defect signal and removes the LED display screen.

[0013] The data center is used to store information on each production line and LDE display screen.

[0014] Compared with the prior art, the beneficial effects of the present invention are: realizing automatic fault detection of LED display screens, greatly reducing the time and workload of manual detection. The display screen on the production line can quickly pass through the detection area, automatically collect images and analyze data and diagnose faults, without manual inspection one by one, significantly improving production efficiency, the system can detect the display screen in real time, and once a fault is found, the operator can be notified immediately for processing, avoiding the delay that may occur in traditional detection methods, making the production process smoother, and reducing the production stagnation time caused by untimely fault detection. Through advanced image acquisition technology and a variety of detection methods, including electrical parameter detection and signal analysis detection, the system can accurately detect various faults in the display screen, including circuit faults, signal problems, etc. Compared with manual detection, the missed detection and false detection rates are reduced, ensuring product quality, the system can accurately locate the fault location, allowing maintenance personnel to quickly repair and shorten the maintenance time. Calibration module ensures accuracy: the calibration module in the system can regularly calibrate the detection equipment to ensure the accuracy and stability of the detection results. This makes the production process more reliable and reduces misjudgments and unnecessary adjustments caused by detection errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The following drawings are not intentionally scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0016] Figure 1 It is a principle block diagram of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0018] Please refer to Figure 1 As shown, the present invention is a fault detection system for display screen production, including a personnel login module, a data acquisition module, an electrical parameter analysis and detection module, a signal analysis module, a control processing module, a remote monitoring module and a data center.

[0019] The personnel login module is used to authenticate the biometric information of the staff. If the authentication is successful, the corresponding matching detection production line will be opened. The specific acquisition process is as follows: The output end of the personnel login module is connected to the input end of the data center. Each staff member sends personal information to the data center through the personnel login module. The personal information includes name, ID number and fingerprint image. The data center receives the personal information, divides the personal information into a personal information set, and marks the person corresponding to the personal information set as a certified person, obtains the control terminal of each LED display detection production line, and matches the control terminal of each LED display detection production line with the personal information of each certified person. The control terminal of an LED display detection production line corresponds to the personal information of one certified person. The certified person captures the fingerprint screenshot information of the current certified person through a mobile phone terminal, extracts the fingerprint image corresponding to the data center, and matches the fingerprint screenshot information of the current certified person with the fingerprint image. If the match is successful, the user enters the control terminal operation interface of the production line corresponding to the certified person. If the match fails, the user exits the information interface of the mobile phone terminal. The personnel login module determines that the current person is not a certified person and generates an abnormal signal and sends it to the sound and light alarm device. The sound and light alarm device receives the abnormal signal and sends a reminder alarm.

[0020] The data acquisition module collects information from each LED display screen on the production line based on each sensor. The specific acquisition process is as follows: The output end of the data acquisition module is connected to the input end of the electrical parameter analysis and detection module. The current data information of each LED display screen is collected in real time through the current sensor to obtain the current parameter value of each LED display screen; the voltage data information of each part of each LED display screen is collected in real time through the voltage sensor to obtain the voltage parameter value of each LED display screen; the obtained current parameter value and voltage parameter value are sent to the electrical parameter analysis and detection module.

[0021] The electrical parameter analysis and detection module receives the data information sent by the data acquisition module and analyzes the electrical parameter fault of the LED display. The specific acquisition process is as follows: The output end of the electrical parameter analysis and detection module is connected to the data processing module, and the input end of the electrical parameter analysis and detection module is connected to the output end of the data center, and all line positions of the LED display screen to be detected are obtained, and all line positions are equally divided into several line distances, and the preset line detection time zone of current and voltage is set for the LED display screen to be detected, and the preset line detection time zone is divided into several preset line time zones, and several line distances are matched with several preset line time zones. One line distance corresponds to one preset line time zone, which is marked as a preset distance monitoring time zone, and each voltage parameter value and each current parameter value of the preset distance monitoring time zone are obtained, and each voltage parameter value is divided by the corresponding current parameter value to obtain each resistance parameter value of the preset distance monitoring time zone, and each resistance parameter value is averaged to obtain the average resistance value, which is marked as , arrange the obtained resistance parameter values ​​from small to large, obtain the maximum resistance value and the minimum resistance value, and mark the maximum resistance value as , subtract the minimum resistance value from the maximum resistance value to get the maximum resistance difference value, marked as , calculate the obtained resistance average value, maximum resistance value and maximum resistance difference value, and use the formula The resistance operating value DTI is obtained, where F1, F2 and F3 are preset proportional coefficients, the preset resistance operating threshold of the data center is extracted, and the actual resistance operating value is compared with the preset resistance operating threshold. If the actual resistance operating value is greater than the preset resistance operating threshold, a resistance abnormality signal is generated and sent to the control processing module.

[0022] The signal analysis module obtains the signal source of the LED display screen and determines the fault characteristics of the signal source. The specific acquisition process is as follows: The output end of the signal analysis module is connected to the control processing module, and the input end of the signal analysis module is connected to the output end of the data center. A signal receiver is installed in the LED display screen, and a signal generator is installed on the detection production line of the LED display screen. The production line detection terminal sends a signal test instruction to the signal receiver of the detection production line. The signal receiver of the detection production line receives the signal test instruction, obtains the position information of the LED display screen to be detected, matches the signal receiver and the signal generator of the LED display screen to be detected, and generates a matching completion signal if the match is successful and sends it to the production line detection terminal. The production line detection terminal receives the matching completion signal and sends a test file to the signal generator. The signal generator receives the test file and sends it to the matching LED display signal receiver. The sending speed and sending duration of the signal generator sending the test file to the LED display signal receiver are obtained, and the average sending speed is obtained according to the sending speed and sending duration, which is marked as , yi is represented as the average value, and then the receiving download speed and receiving time of the display signal receiver are obtained. According to the receiving download speed and receiving time, the average receiving speed is obtained, which is marked as , obtain the corresponding positioning according to the position information of the LED display screen to be detected, connect the positioning of the LED display screen and the signal generator, and obtain the signal test distance, marked as , set the preset signal strength of the signal area to , calculate the obtained average sending speed, average receiving speed, preset signal strength and signal test distance, and use the formula The signal transmission value FG is obtained, where G1, G2, G3 and G4 are preset proportional coefficients, and their sizes are customized by technicians. i represents the number of the LED display screen, and n represents the total number of LED display screens. The preset signal transmission threshold of the data center is extracted, and the preset signal transmission threshold is compared with the actual signal transmission value. If the actual signal transmission value is less than the preset signal transmission threshold, a fault signal is generated and sent to the control processing module.

[0023] The control processing module processes the display screen faults according to the received signals. The specific acquisition process is as follows: The output end of the control processing module is connected to the input end of the data center, and a resistance abnormality signal is received to obtain the location of the corresponding LED display screen. The circuits of the LED display screen are divided into several circuit segments, and each circuit segment is tested by a resistance tester to obtain each resistance value. The resistance threshold preset by the data center is extracted, and each resistance value obtained by each circuit segment is compared with the preset resistance threshold. If the resistance value of a circuit segment is greater than the preset resistance threshold, the LED display screen is marked as a short-circuited display screen and is scrapped.

[0024] After receiving a fault signal, the location of the corresponding faulty LED display screen is obtained, and the LED display screen is marked as a target display screen. With the target display screen as a dot, the location of the mobile terminal of each maintenance personnel within the radius is obtained, and the target display screen and the location of the mobile terminal of each maintenance personnel are connected to obtain each maintenance distance value, and each maintenance distance value is arranged from small to large, and the minimum distance value is selected, and the maintenance personnel corresponding to the minimum distance value is marked as the preferred maintenance personnel, and the control processing module generates a processing signal and sends it to the preferred maintenance personnel, and the preferred maintenance personnel receives the signal and repairs the LED display screen.

[0025] The remote monitoring module monitors the damage on the outer surface of the display screen using a high-definition camera and removes the LED display screens with damage and defects. The specific acquisition process is as follows: A high-definition camera is installed on the detection production line. If the LED display screen to be detected has no abnormal circuit and signal conditions, an appearance inspection signal is generated and sent to the high-definition camera. After receiving the appearance inspection signal, the high-definition camera performs all-round image acquisition on the appearance of the LED display screen to be detected, and obtains images of the LED display screen corresponding to each direction. The images of the LED display screen to be detected are subjected to image enhancement processing to obtain increased images in each direction, and the concave-convex area and gap area of ​​the enhanced images in each direction are extracted. The concave-convex area and gap area of ​​the enhanced images in each direction are analyzed to obtain the appearance defect value of the LED display screen, and the preset appearance defect threshold of the data center is extracted. If the appearance defect value of the LED display screen is greater than the preset appearance defect threshold, the LED display screen is marked as a defective device, and a defect signal is generated and sent to the production line detection terminal. The production line detection terminal receives the defect signal and removes the LED display screen.

[0026] The data center is used to store information on each production line and LDE display screen.

[0027] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. A fault detection system for display screen production, comprising a personnel login module, a data acquisition module, an electrical parameter analysis and detection module, a control and processing module, a remote monitoring module and a data center, characterized in that: It also includes a signal analysis module; the signal analysis module determines the fault characteristics of the signal source based on the acquisition of the signal source of the LED display screen, the input end of the signal analysis module is connected to the output end of the data center, a signal receiver is installed in the LED display screen, and a signal generator is installed on the detection production line of the LED display screen, the production line detection terminal sends a signal test instruction to the signal receiver of the detection production line, the signal receiver of the detection production line receives the signal test instruction, obtains the position information of the LED display screen to be detected, matches the signal receiver and the signal generator of the LED display screen to be detected, and generates a matching completion signal if the match is successful and sends it to the production line detection terminal, the production line detection terminal receives the matching completion signal, sends a test file to the signal generator, the signal generator receives the test file and sends it to the matching LED display signal receiver, obtains the sending speed and sending duration of the signal generator sending the test file to the LED display signal receiver, and obtains the sending speed average according to the sending speed and sending duration, which is marked as , and then obtain the receiving download speed and receiving time of the display screen signal receiver, and obtain the average receiving speed based on the receiving download speed and receiving time, marked as , obtain the corresponding positioning according to the position information of the LED display screen to be detected, connect the positioning of the LED display screen and the signal generator, and obtain the signal test distance, marked as , set the preset signal strength of the signal area to , using the formula The signal transmission value FG is obtained, wherein G1, G2, G3 and G4 are preset proportional coefficients, i represents the number of the LED display screen, and n represents the total number of LED display screens; if the actual signal transmission value is less than the preset signal transmission threshold, a fault signal is generated and sent to the control processing module.

2. A display screen production fault detection system according to claim 1, characterized in that: The electrical parameter analysis and detection module receives the data information sent by the data acquisition module and analyzes the electrical parameter fault of the LED display. The specific process is as follows: The output end of the electrical parameter analysis and detection module is connected to the data processing module, and the input end of the electrical parameter analysis and detection module is connected to the output end of the data center, and all line positions of the LED display screen to be detected are obtained, and all line positions are equally divided into several line distances, and the preset line detection time zone of current and voltage is set for the LED display screen to be detected, and the preset line detection time zone is divided into several preset line time zones, and several line distances are matched with several preset line time zones. One line distance corresponds to one preset line time zone, which is marked as a preset distance monitoring time zone, and each voltage parameter value and each current parameter value of the preset distance monitoring time zone are obtained, and each voltage parameter value is divided by the corresponding current parameter value to obtain each resistance parameter value of the preset distance monitoring time zone, and each resistance parameter value is averaged to obtain the average resistance value, which is marked as , arrange the obtained resistance parameter values ​​from small to large, obtain the maximum resistance value and the minimum resistance value, and mark the maximum resistance value as , subtract the minimum resistance value from the maximum resistance value to get the maximum resistance difference value, marked as , calculate the obtained resistance average value, maximum resistance value and maximum resistance difference value, and use the formula The resistance operating value DTI is obtained, where F1, F2 and F3 are preset proportional coefficients, the preset resistance operating threshold of the data center is extracted, and the actual resistance operating value is compared with the preset resistance operating threshold. If the actual resistance operating value is greater than the preset resistance operating threshold, a resistance abnormality signal is generated and sent to the control processing module.

3. A display screen production fault detection system according to claim 1, characterized in that: The control processing module processes the display screen faults according to the received signals. The specific process is as follows: The output end of the control processing module is connected to the input end of the data center, and the abnormal resistance signal is received to obtain the location of the corresponding LED display screen, and each circuit of the LED display screen is divided into several circuit segments. Each circuit segment is tested by a resistance tester to obtain each resistance value, and the resistance threshold preset by the data center is extracted. The resistance values ​​obtained by each circuit segment are compared with the preset resistance threshold. If the resistance value of a circuit segment is greater than the preset resistance threshold, the LED display screen is marked as a short-circuited display screen and is scrapped. After receiving a fault signal, the location of the corresponding faulty LED display screen is obtained, and the LED display screen is marked as a target display screen. With the target display screen as a dot, the location of the mobile terminal of each maintenance personnel within the radius is obtained, and the target display screen and the location of the mobile terminal of each maintenance personnel are connected to obtain each maintenance distance value, and each maintenance distance value is arranged from small to large, and the minimum distance value is selected, and the maintenance personnel corresponding to the minimum distance value is marked as the preferred maintenance personnel, and the control processing module generates a processing signal and sends it to the preferred maintenance personnel, and the preferred maintenance personnel receives the signal and repairs the LED display screen.

4. A display screen production fault detection system according to claim 1, characterized in that: The remote monitoring module monitors the damage on the outer surface of the display screen using a high-definition camera and removes the LED display screens with damage and defects. The specific process is as follows: A high-definition camera is installed on the detection production line. If the LED display screen to be detected has no abnormal circuit and signal conditions, an appearance inspection signal is generated and sent to the high-definition camera. After receiving the appearance inspection signal, the high-definition camera performs all-round image acquisition on the appearance of the LED display screen to be detected, and obtains images of the LED display screen corresponding to each direction. The images of the LED display screen to be detected are subjected to image enhancement processing to obtain increased images in each direction, and the concave-convex area and gap area of ​​the enhanced images in each direction are extracted. The concave-convex area and gap area of ​​the enhanced images in each direction are analyzed to obtain the appearance defect value of the LED display screen, and the preset appearance defect threshold of the data center is extracted. If the appearance defect value of the LED display screen is greater than the preset appearance defect threshold, the LED display screen is marked as a defective device, and a defect signal is generated and sent to the production line detection terminal. The production line detection terminal receives the defect signal and removes the LED display screen.

5. A display screen production fault detection system according to claim 1, characterized in that: The personnel login module is used to authenticate the biometric information of the staff. If the authentication is successful, the corresponding matching detection production line will be opened. The specific process is as follows: The output end of the personnel login module is connected to the input end of the data center. Each staff member sends personal information to the data center through the personnel login module. The personal information includes name, ID number and fingerprint image. The data center receives the personal information, divides the personal information into a personal information set, and marks the person corresponding to the personal information set as a certified person, obtains the control terminal of each LED display detection production line, and matches the control terminal of each LED display detection production line with the personal information of each certified person. The control terminal of an LED display detection production line corresponds to the personal information of one certified person. The certified person captures the fingerprint screenshot information of the current certified person through a mobile phone terminal, extracts the fingerprint image corresponding to the data center, and matches the fingerprint screenshot information of the current certified person with the fingerprint image. If the match is successful, the user enters the control terminal operation interface of the production line corresponding to the certified person. If the match fails, the user exits the information interface of the mobile phone terminal. The personnel login module determines that the current person is not a certified person and generates an abnormal signal and sends it to the sound and light alarm device. The sound and light alarm device receives the abnormal signal and sends a reminder alarm.

6. A display screen production fault detection system according to claim 1, characterized in that: The data acquisition module collects information from each LED display screen on the production line based on each sensor. The specific process is as follows: The output end of the data acquisition module is connected to the input end of the electrical parameter analysis and detection module. The current data information of each LED display screen is collected in real time through the current sensor to obtain the current parameter value of each LED display screen; the voltage data information of each part of each LED display screen is collected in real time through the voltage sensor to obtain the voltage parameter value of each LED display screen; the obtained current parameter value and voltage parameter value are sent to the electrical parameter analysis and detection module.

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