A method, system and device for controlling display content of LED information board

Abstract

The present application relates to the technical field of display control, and specifically to a method, system, and device for controlling the display content of an LED information board. The method comprises: collecting temperature data, humidity data, and current data at each moment during the operation of the LED information board; performing linear fitting on the temperature data to obtain the temperature change rate at each moment; obtaining the average temperature deviation at each moment based on the difference distribution characteristics between the temperature data and a preset ideal temperature; obtaining the environmental damage coefficient at each moment based on the difference between the humidity data and the preset ideal humidity; performing threshold segmentation on the current data at multiple consecutive moments, and obtaining the fault confidence level at each moment based on the degree of chaos and autocorrelation; determining whether the display content of the LED information board is abnormal, and controlling the display content of the LED information board. The present application aims to avoid the negative impact caused by the LED information board displaying erroneous information due to a fault.

Description

Technical Field

[0001] The present application relates to the technical field of display control of displays, and in particular to a method, system and device for controlling the display content of an LED information board. Background Art

[0002] LED signage, a common electronic display device, has been widely used in various applications, such as traffic signs, advertising displays, and information dissemination. Its core function is to accurately and in real time display various information contents through display control methods. The efficient operation of LED signage depends on the complex and sophisticated control system behind it. This control system is responsible for analyzing the information sent by the host computer and converting it into signals that can be recognized by the semiconductor light-emitting diode array to realize the dynamic display of information. Therefore, ensuring the stable operation of the LED signage control system is crucial.

[0003] However, LED information boards on highways are often subject to dust and rain due to their complex environment. This can cause various faults to occur on these boards, affecting the stable operation of the semiconductor light-emitting diode array. Once an LED information board fails, the semiconductor light-emitting diodes cannot respond in a timely manner. Currently, the method of elimination is usually used to diagnose LED information board faults. Although this method can accurately locate the fault location of the LED information board, in actual application, this method is time-consuming and requires checking possible fault points one by one. It is impossible to control and adjust the display content of the LED information board in a timely manner, which in turn affects the effectiveness of highway information services. Summary of the Invention

[0004] In view of the above, it is necessary to provide a method, system and device for controlling the display content of an LED information board to solve the above problems.

[0005] According to one aspect of the present application, a method for controlling display content of an LED information board is provided, the method comprising:

[0006] Collect temperature data, humidity data and current data at each moment during the operation of the LED information board;

[0007] Perform a straight line fit on the temperature data at each moment and a preset number of moments before, and based on the trend characteristics of the fitted line, obtain the temperature change rate at each moment; based on the difference distribution characteristics between the temperature data at each moment and a preset number of moments before and the preset ideal temperature, obtain the average temperature deviation at each moment; and combine the temperature change rate and average temperature deviation at each moment with the difference between the humidity data at each moment and the preset ideal humidity to obtain the environmental damage coefficient at each moment.

[0008] Performing threshold segmentation on the current data at each moment and a preset number of moments before to obtain the current dispersion at each moment; analyzing the degree of chaos and autocorrelation of the current data at each moment and a preset number of moments before, and combining the current dispersion and the environmental damage coefficient to obtain the fault confidence at each moment;

[0009] Based on the fault confidence level, it is determined whether the display content of the LED information board is abnormal. If abnormal, the display content is controlled.

[0010] Preferably, the temperature change rate at each moment is specifically the absolute value of the slope of the fitting straight line.

[0011] Preferably, the average temperature deviation at each moment is obtained as follows:

[0012] Calculate the difference between the temperature data at each moment and the preset number of moments before and the preset ideal temperature, and record it as the first difference; and take the average value of the first differences corresponding to all temperature data as the average temperature deviation at each moment.

[0013] Preferably, the environmental damage coefficient at each moment is obtained as follows:

[0014] According to the numerical difference between the humidity data at each moment and the preset ideal humidity data, the humidity confidence factor at each moment is obtained;

[0015] Based on the forward fusion results of the temperature change rate, average temperature deviation and humidity confidence factor at each moment, the environmental damage coefficient at each moment is obtained.

[0016] Preferably, the current dispersion at each moment is obtained as follows:

[0017] Performing threshold segmentation on the current data at each moment and a preset number of moments before to obtain a segmentation threshold;

[0018] The set of current data with current values ​​greater than the segmentation threshold is recorded as the abnormal current set, and the set of current data with current values ​​less than or equal to the segmentation threshold is recorded as the normal current set;

[0019] Calculate the mean of all current data in the abnormal current set and the normal current set respectively, and record them as the first mean and the second mean;

[0020] The difference between the first mean value and the second mean value is used as the current dispersion at each moment.

[0021] Preferably, the fault confidence at each moment is obtained as follows: Where, CLF t represents the fault confidence at time t; EDF trepresents the environmental damage coefficient at time t; D t represents the current dispersion at the tth moment; sh t represents the current information entropy at time t; ACF t represents the autocorrelation coefficient of the current data at time t and before the preset number of times; β is the preset parameter adjustment factor.

[0022] Preferably, the determining whether the display content of the LED information board is abnormal based on the fault confidence level is specifically as follows:

[0023] An anomaly detection algorithm is used to obtain the fault significance at all times. When the fault confidence is an abnormal value, the display content of the LED information board at the corresponding moment is judged to be abnormal; otherwise, the display content of the LED information board at the corresponding moment is judged to be normal.

[0024] Preferably, if there is an abnormality, the display content is controlled, specifically: executing a black screen instruction.

[0025] According to another aspect of the present application, a display content control device for an LED information board is provided, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0026] According to another aspect of the present application, a display content control system for an LED information board is provided, wherein a computer program is stored in the system, and when the computer program is executed by a processor, any one of the above-mentioned display content control methods is implemented.

[0027] This application has at least the following beneficial effects:

[0028] This application first obtains the temperature, humidity and current data during the operation of the LED information board, and first constructs an environmental damage coefficient based on the impact of changes in ambient temperature and humidity on the working status of the LED information board. The beneficial effect is that the environmental damage coefficient takes into account the abnormal rising phenomenon caused by dust accumulation during the operation of the LED information board and the erosion of the LED information board when the air humidity is high. Based on the environmental damage coefficient, the degree of influence of ambient temperature and humidity on the LED information board can be accurately reflected; secondly, based on the internal current changes of the LED information board and combined with the environmental damage factor, the information board fault confidence is constructed. The beneficial effect is that the information board fault confidence takes into account the abnormal current fluctuation caused by the influence of ambient temperature and humidity. Therefore, based on the information board fault confidence, the actual operation status of the LED information board at each monitoring moment can be accurately reflected. Finally, based on the information board fault confidence and combined with the anomaly detection algorithm, the actual operating status of the LED information board at each moment is determined. When the LED information board fails, the display content is controlled to avoid erroneous and outdated information from misleading pedestrians, thereby effectively avoiding the negative impact of the display of erroneous information. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A flowchart of a method for controlling the display content of an LED information board provided in this application;

[0030] Figure 2 This is a schematic diagram of obtaining fault confidence provided by this application. DETAILED DESCRIPTION

[0031] In the description of the embodiments of this application, words such as "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "or," and "for example" is intended to present the relevant concepts in a concrete manner.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It should also be noted that the terms "first" and "second" in this application and the accompanying drawings are used to distinguish similar objects, rather than to describe a specific order or sequence. The methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the methods. Without departing from the scope of this application, the order of executing multiple steps can be interchanged with each other, and some steps can also be deleted.

[0034] See also Figure 1 , which shows a flowchart of a method for controlling the display content of an LED information board provided by an embodiment of the present application, the method comprising the following steps:

[0035] Step 1: Collect temperature data, humidity data, and current data at each moment during the operation of the LED information board.

[0036] This application aims to control and adjust the display content of LED information boards used in road traffic. Specifically, when an LED information board fails, the front-end device automatically issues a black screen command, promptly shutting down the LED information board display content to prevent outdated and erroneous information from misleading pedestrians. However, the prerequisite for controlling the display content of the LED information board is to accurately identify whether the LED information board has failed. Therefore, this application first accurately identifies the operating status of the LED information board.

[0037] Specifically, this application uses a temperature sensor, a humidity sensor, and a current sensor to collect temperature, humidity, and current data during the operation of the LED information board, with a data collection period of 1 second. It should be noted that excessive or insufficient temperature and humidity will affect the normal operation of the LED information board. When the temperature is between 20°C and 25°C and the humidity is between 30% and 60% RH, the LED information board can maintain its optimal working state. Therefore, in this embodiment, the operating environment temperature is set to 25°C and the humidity is set to 40% RH. The implementer can adjust it according to actual conditions, and this application does not impose any restrictions on this.

[0038] To prevent data loss in the collected data, the collected data is preprocessed using a mean-filling algorithm. Furthermore, to facilitate analysis, this application uses a Z-score normalization method to preprocess the collected data to eliminate the effects of dimension. Both the mean-filling method and the Z-score normalization method are well-known techniques, and this application will not elaborate on their implementation processes.

[0039] Step 2: Perform straight line fitting on the temperature data at each moment and a preset number of moments before, and obtain the temperature change rate at each moment based on the trend characteristics of the fitted straight line; obtain the average temperature deviation at each moment based on the difference distribution characteristics between the temperature data at each moment and a preset number of moments before and the preset ideal temperature; comprehensively consider the temperature change rate and average temperature deviation at each moment, and combine the difference between the humidity data at each moment and the preset ideal humidity to obtain the environmental damage coefficient at each moment.

[0040] With the increasing complexity of traffic management, LED information boards have become an important group vehicle service and guidance equipment in road traffic management in large cities. However, LED information boards used in traffic roads often malfunction due to the erosion of environmental factors, making it impossible to correctly process display data, which in turn leads to incomplete or garbled display content of the semiconductor light emitting diode array, and the display content cannot be updated. These problems affect the effectiveness and real-time nature of the content displayed on the LED information board. Traditional fault location methods usually require staff to use elimination methods to locate faults on site, which affects the timeliness and effectiveness of highway information services. Therefore, in response to the above-mentioned technical defects, this application proposes an automatic black screen command execution technology to effectively avoid the display of erroneous information and its possible negative impact. However, the implementation of the automatic black screen command execution technology requires accurate identification of whether the LED information board has failed. Therefore, this application first monitors the operating status of the LED information board.

[0041] LED information boards, due to their long-term operation in complex outdoor environments, are subject to a variety of adverse factors. Dust raised by passing vehicles is a significant problem, as it can settle inside the LED information board. This dust can cover key areas such as circuit boards and electronic components, affecting their heat dissipation and causing the temperature to rise. High temperatures can damage circuit boards and electronic components, accelerating the aging of the LED information board. Excessively low temperatures can cause the LED information board to malfunction, and prolonged exposure to high or low temperatures can cause permanent damage. High humidity in the air can further exacerbate the hygroscopicity of dust, and moist dust is more conductive, putting the LED information board at risk of short circuits. Furthermore, humid environments can exacerbate corrosion of the internal components of the LED information board, and both short circuits and corrosion can further increase the temperature of the LED information board. Therefore, this application first obtains the temperature data and humidity data monitored at each moment and a preset number of moments before, and records them as the temperature data sequence and humidity data sequence at each moment. In this embodiment, the time period composed of each moment and a preset number of moments before is 5 minutes. For the data within 5 minutes before the sensor starts working, this embodiment uses a polynomial interpolation algorithm to fill in.

[0042] Perform a straight line fit on the temperature data at each moment and the previous preset number of moments. Based on the trend characteristics of the fitted straight line, the temperature change rate at each moment is obtained:

[0043] Specifically, when the LED information board is in normal operating condition, its temperature is within the normal operating temperature range. When dust accumulation is severe, the temperature will continue to rise as the LED information board continues to operate due to the inability to dissipate heat in a timely manner. Therefore, this application uses the temperature data sequence at each moment as input and uses the least squares linear fitting algorithm to perform a straight line fit. The absolute value of the fitting slope is obtained and recorded as the temperature change rate of the LED information board at each moment. The larger the value of the temperature change rate, the worse the heat dissipation effect of the LED information board, and the more likely it is to malfunction due to continued high temperature, which in turn causes the semiconductor light-emitting diode array to malfunction. It should be noted that the least squares linear fitting algorithm is a well-known technology, and this application will not further elaborate on its implementation process.

[0044] Based on the difference distribution characteristics between the temperature and humidity data at each moment and the preset number of moments before and the preset ideal temperature and humidity, the average temperature deviation and average humidity deviation at each moment are obtained:

[0045] Secondly, calculate the difference between the temperature data at each moment and the preset number of moments before and the preset ideal temperature, and record it as the first difference; the average value of the first differences corresponding to all temperature data is used as the average temperature deviation at each moment; in this embodiment, the first difference corresponding to the temperature data is calculated using the absolute value of the difference; the larger the value of the average temperature deviation, the greater the possibility that the LED information board is in an abnormal operating state at the corresponding moment, and the more likely it is that a sudden failure will occur.

[0046] Furthermore, considering the impact of humidity in the air on the working state of the LED information board, specifically, a high-humidity environment may cause the LED information board to short-circuit or corrode. Short-circuiting and corrosion will further increase the temperature of the LED information board, thereby increasing damage to the LED information board. Therefore, this application further analyzes the humidity data of the LED information board. First, since the humidity change of the LED information board is mainly affected by external environmental factors, that is, the humidity will not change significantly in a short period of time, the absolute value of the difference between the humidity data of the LED information board at each moment and the ideal humidity is used as the humidity confidence factor. It should be noted that the larger the value of the humidity confidence factor, the worse the working environment of the LED information board at the corresponding moment, and the more likely the semiconductor light-emitting diode array will not be able to display the information content normally due to abnormal operation of the LED information board.

[0047] Based on the forward fusion results of the temperature change rate, average temperature deviation and humidity confidence factor at each moment, the environmental damage coefficient at each moment is obtained. In this embodiment, the temperature change rate at the t moment is recorded as b t ; The average temperature deviation at time t is recorded as δ t ; The humidity confidence factor at time t is recorded as γ t; The mathematical relationship of the environmental damage factor at time t is:

[0048] It should be understood that when the temperature of the LED information board changes during its operation due to the ambient temperature and its own heating, the calculated temperature change rate of the LED information board at moment t becomes larger. The greater the actual temperature of the LED information board deviates from the ideal temperature during normal operation, the larger the calculated average temperature deviation at moment t. In addition, the environment will also affect the working state of the LED information board. When the operating temperature of the LED information board is abnormal, changes in the humidity of the environment will have a more serious impact on the operation of the LED information board, thereby increasing the calculated value of the environmental damage coefficient at moment t, indicating that the LED information board is more likely to experience aging of electronic components due to environmental abnormalities, thereby causing part or all of the semiconductor light emitting diode array to malfunction.

[0049] Step 3: Perform threshold segmentation on the current data at each moment and a preset number of moments before to obtain the current dispersion at each moment; analyze the degree of chaos and autocorrelation of the current data at each moment and a preset number of moments before, and combine the current dispersion and the environmental damage coefficient to obtain the fault confidence at each moment.

[0050] Temperature changes can also affect the stability of the content displayed on LED information boards. Specifically, because LED information boards are sensitive to temperature changes, rising temperatures will reduce the operating voltage of the LED information board. For LED information boards, the current and voltage passing through the semiconductor light-emitting diodes have a nonlinear relationship. A small change in voltage will cause a sharp change in current. In addition, the brightness of the semiconductor light-emitting diodes is closely related to the current. Therefore, temperature changes in LED information boards will ultimately affect the brightness of the semiconductor light-emitting diodes.

[0051] Under ideal working conditions, in order to ensure the stability of the LED information board, that is, the stability of the luminous intensity of the semiconductor light emitting diode, the LED information board usually adopts a constant current driving power supply with a current regulation mechanism to ensure the stable operation of the information board. Therefore, under ideal working conditions, the current of the LED information board is usually in a constant state with small fluctuations. However, during the actual operation of the LED information board, the current of the LED information board cannot always be in a constant state due to the influence of the ambient temperature and humidity and the electrothermal conversion during its own operation. Therefore, the present application further obtains the current data monitored at each moment and a preset number of moments before, and records it as a current data sequence at each moment. Secondly, the current data sequence at each moment is used as input, and the Otsu threshold algorithm is used to segment the current data sequence to obtain the segmentation threshold of the current data sequence at each moment. It should be noted that the length of the time period composed of each moment and a preset number of moments before is 5 minutes. The Otsu threshold algorithm belongs to a well-known technology, and the present application will no longer describe its implementation process in detail. Among them, the set consisting of current data with current values ​​greater than the segmentation threshold is recorded as the abnormal current set, and the set consisting of current data less than or equal to the segmentation threshold is recorded as the normal current set. Secondly, the mean difference between the currents in the abnormal current set and the normal current set is calculated and recorded as the current dispersion at each moment. It should be noted that when the LED information board is in normal operating state, the current regulation mechanism can ensure the smooth output of the current of the information board, and the value of the current dispersion calculated at this time is small. On the contrary, when the temperature changes greatly during the operation of the information board, the current of the information board is difficult to maintain a stable state due to the influence of temperature, and the value of the calculated current dispersion is larger, indicating that the LED information board is more affected by temperature changes.

[0052] To analyze the fluctuations in the current within the semiconductor light-emitting diode at each moment, we further calculated the information entropy of the data within the current data sequence at each moment. Information entropy represents the volatility and uncertainty of the current data sequence. A larger value of information entropy indicates a more unstable current flowing through the semiconductor light-emitting diode and a greater degree of influence from temperature changes. The calculation of information entropy is well-known technology, and this application will not further elaborate on its implementation process.

[0053] Furthermore, under normal operating conditions, the current data from the LED information board remains essentially constant, with minimal overall fluctuations, resulting in a relatively large autocorrelation coefficient for the current data series at each moment. However, when the current of the LED information board fluctuates due to temperature changes, the combined effects of ambient temperature changes and the LED's own current regulation mechanism cause irregular fluctuations in the internal current of the LED, further reducing the autocorrelation coefficient for the current data series at each moment. Therefore, the present application obtains the temporal autocorrelation coefficient for the current data series at each moment. In this embodiment, the time lag is set to 1. The calculation of the temporal autocorrelation coefficient is well known in the art, and this application will not further elaborate on its implementation process.

[0054] Therefore, this application constructs the fault confidence based on the above analysis and combined with the environmental damage coefficient, and its formula is: Where, CLF t represents the fault confidence at time t; EDF t represents the environmental damage coefficient at time t; D t represents the current dispersion at the tth moment; sh t represents the current information entropy at time t; ACF t Represents the autocorrelation coefficient of the current data at time t and before the preset number; β is the preset parameter adjustment factor. Considering that the value range of the time autocorrelation coefficient is [-1, 1], a large parameter adjustment factor will have a greater impact on the fault confidence evaluation result. Therefore, when avoiding the denominator to be 0, the parameter adjustment factor is not easy to be too large. Therefore, the parameter adjustment factor has a smaller value range. In this embodiment, the parameter adjustment factor is 1.01. Among them, the fault confidence acquisition diagram is shown as follows: Figure 2 shown.

[0055] It should be understood that the greater the deviation between the ambient temperature and humidity and the temperature and humidity in the ideal working environment, the greater the calculated environmental damage coefficient of the LED information board; when the current fluctuates due to the ambient temperature and humidity and its own electrothermal conversion during the operation of the LED information board, the greater the current fluctuation, the greater the calculated current discreteness and current information entropy values; finally, due to the influence of temperature and humidity, the current fluctuates irregularly, which reduces the time autocorrelation coefficient of the current data sequence, and increases the fault confidence value, indicating that the LED information board is more likely to fail due to environmental factors.

[0056] Step 4: Based on the fault confidence level, determine whether the display content of the LED information board is abnormal. If abnormal, control the display content.

[0057] Since the fault confidence level comprehensively considers the abnormal changes in ambient temperature and humidity as well as the internal current of the LED information board during its operation, the actual operating status of the LED information board at each monitoring moment can be accurately reflected based on the fault confidence level, thereby enabling timely regulation of the semiconductor light-emitting diode array.

[0058] Specifically, the fault confidence data set calculated at each moment is recorded as U. Under normal circumstances, the differences between the data in the data set U are small, and the data distribution is relatively concentrated. However, when the LED information board fails to operate, the calculated fault confidence will increase abnormally, thereby deviating from the normal distribution range of the data U. Therefore, the present application uses the data set U as input and adopts the local outlier factor algorithm to detect the abnormal values ​​of the data set U. In this embodiment, the number of nearest neighbor distances k is set to 8. When the fault confidence at a certain moment is an abnormal value, it indicates that the LED information board at the corresponding moment may have a fault, and the semiconductor light emitting diode array is more likely to display an error message. At this time, the black screen instruction is executed to avoid outdated information and error information misleading pedestrians, and an alarm is sent to the control center to repair the faulty LED information board in time.

[0059] Based on the same concept as the method embodiment of the present application, a display content control device for an LED information board is provided, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0060] Based on the same concept as the embodiment of the method of the present application, a display content control system for an LED information board is provided, wherein a computer program is stored in the system, and when the computer program is executed by a processor, any one of the above-mentioned display content control methods is implemented.

[0061] To sum up, the embodiment of the present application first obtains the temperature, humidity and current data during the operation of the LED information board, and first constructs an environmental damage coefficient based on the impact of changes in ambient temperature and humidity on the working status of the LED information board. The beneficial effect is that the environmental damage coefficient takes into account the abnormal rising phenomenon caused by dust accumulation during the operation of the LED information board and the erosion of the LED information board when the air humidity is high. Based on the environmental damage coefficient, the degree of influence of ambient temperature and humidity on the LED information board can be accurately reflected; secondly, based on the internal current changes of the LED information board and combined with the environmental damage factor, the information board fault confidence is constructed. The beneficial effect is that the information board fault confidence takes into account the abnormal current fluctuation phenomenon caused by the influence of ambient temperature and humidity. Therefore, based on the information board fault confidence, the actual operation status of the LED information board at each monitoring moment can be accurately reflected. Finally, based on the information board fault confidence and combined with the abnormality detection algorithm, the actual operating status of the LED information board at each moment is determined. When the LED information board fails, the display content is controlled to avoid erroneous and outdated information from misleading pedestrians, thereby effectively avoiding the negative impact of the display of erroneous information.

[0062] It should be noted that the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for controlling the display content of an LED information board, characterized in that: The method comprises the following steps: Collect temperature data, humidity data and current data at each moment during the operation of the LED information board; Performing linear fitting on the temperature data at each moment and a preset number of moments before, and obtaining the temperature change rate at each moment based on the trend characteristics of the fitted straight line, the temperature change rate being used to characterize the heat dissipation effect of the LED information board; obtaining the average temperature deviation at each moment based on the difference distribution characteristics between the temperature data at each moment and a preset number of moments before and the preset ideal temperature; and obtaining the environmental damage coefficient at each moment based on the temperature change rate and the average temperature deviation, combined with the difference between the humidity data at each moment and the preset ideal humidity. The environmental damage coefficient is obtained based on the forward fusion result of the temperature change rate, the average temperature deviation, and the humidity confidence factor at each moment, the humidity confidence factor being the absolute value of the difference between the humidity data and the preset ideal humidity data. The environmental damage coefficient is used to reflect the degree of influence of the ambient temperature and humidity on the LED information board. Performing threshold segmentation on the current data at each moment and a preset number of moments before to obtain the current dispersion at each moment; analyzing the degree of chaos and autocorrelation of the current data at each moment and a preset number of moments before, and combining the current dispersion and the environmental damage coefficient to obtain the fault confidence at each moment; Based on the fault confidence level, it is determined whether the display content of the LED information board is abnormal. If abnormal, the display content is controlled.

2. The method for controlling the display content of an LED information board according to claim 1, wherein: The temperature change rate at each moment is specifically the absolute value of the slope of the fitting straight line.

3. The method for controlling the display content of an LED information board according to claim 1, wherein: The average temperature deviation at each moment is obtained as follows: Calculate the difference between the temperature data at each moment and the preset number of moments before and the preset ideal temperature, and record it as the first difference; and take the average value of the first differences corresponding to all temperature data as the average temperature deviation at each moment.

4. The method for controlling the display content of an LED information board according to claim 1, wherein: The current dispersion at each moment is obtained as follows: Performing threshold segmentation on the current data at each moment and a preset number of moments before to obtain a segmentation threshold; The set of current data with current values ​​greater than the segmentation threshold is recorded as the abnormal current set, and the set of current data with current values ​​less than or equal to the segmentation threshold is recorded as the normal current set; Calculate the mean of all current data in the abnormal current set and the normal current set respectively, and record them as the first mean and the second mean; The difference between the first mean value and the second mean value is used as the current dispersion at each moment.

5. The method for controlling the display content of an LED information board according to claim 1, wherein: The fault confidence at each moment is specifically obtained as follows: Where, represents the fault confidence at time t; represents the environmental damage coefficient at time t; represents the current dispersion at time t; represents the current information entropy at the tth moment; Represents the autocorrelation coefficient of the current data at time t and a preset number of times before; is the preset parameter adjustment factor.

6. The method for controlling the display content of an LED information board according to claim 1, wherein: The method of judging whether the display content of the LED information board is abnormal based on the fault confidence level is as follows: An anomaly detection algorithm is used to obtain the fault significance at all times. When the fault confidence is an abnormal value, the display content of the LED information board at the corresponding moment is judged to be abnormal; otherwise, the display content of the LED information board at the corresponding moment is judged to be normal.

7. The method for controlling the display content of an LED information board according to claim 1, wherein: If there is an abnormality, the display content is controlled, specifically: executing a black screen command.

8. A device for controlling the display content of an LED information board, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

9. A display content control system for an LED information board, wherein a computer program is stored in the system, characterized in that: When the computer program is executed by a processor, the display content control method according to any one of claims 1 to 7 is implemented.

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