Display content control method, system and device of LED information board

Abstract

The invention relates to the technical field of display control of displayers, in particular to a display content control method, system and device of an LED information board, and the method comprises the steps: collecting temperature data, humidity data and current data of each moment in the working process of the LED information board; performing linear fitting on the temperature data to obtain the temperature change rate of each moment; based on the difference distribution characteristics of the temperature data and the preset ideal temperature, the average temperature deviation of all moments is obtained; combining the difference between the humidity data and the preset ideal humidity to obtain an environmental damage coefficient at each moment; carrying out threshold segmentation on the current data at a plurality of continuous moments, and obtaining the fault confidence of each moment in combination with the confusion degree and the autocorrelation; and judging whether the display content of the LED information board is abnormal or not, and controlling the display content of the LED information board. The invention aims to avoid negative effects caused by wrong information display due to faults of the LED information board.

Description

Technical Field

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

[0002] As a common electronic display device, LED information boards have been widely used in various occasions, such as traffic instructions, advertising displays, information releases, etc. Its core function is to display various information contents in real time and accurately through display control methods. The efficient operation of LED information boards depends on the complex and sophisticated control system behind them. The control system is responsible for parsing the information content sent by the host computer and converting it into a signal that can be recognized by the semiconductor light emitting diode array to realize the dynamic display of information. Therefore, it is very important to ensure the stable operation of the LED information board control system.

[0003] However, for LED information boards on highways, due to the complex environment in which they are located, they are generally subject to dust and rain, which causes various faults to occur frequently on the LED information boards, affecting the stable operation of the semiconductor light-emitting diode array. Once a fault occurs on the LED information board, the semiconductor light-emitting diode will not be able to respond in time. At present, the method for diagnosing LED information board faults usually adopts the elimination method. Although the elimination 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 time, 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 straight line fitting on the temperature data at each moment and the 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 the preset number of moments before and the preset ideal temperature; obtain the environmental damage coefficient at each moment by combining the temperature change rate and the average temperature deviation at each moment, and the difference between the humidity data at each moment and the preset ideal humidity;

[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 confusion and autocorrelation of the current data at each moment and a preset number of moments before, 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] The differences between the temperature data at each moment and the preset number of moments before and the preset ideal temperature are calculated and recorded as the first difference; the average value of the first differences corresponding to all temperature data is taken 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 an abnormal current set, and the set of current data with current values ​​less than or equal to the segmentation threshold is recorded as a normal current set;

[0019] Calculate the means 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 the tth moment; 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 the tth moment; ACF t represents the autocorrelation coefficient of the current data at the tth moment and the preset number of times before; β is the preset parameter adjustment factor.

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

[0023] An abnormality 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 displayed content is controlled, specifically: a black screen instruction is executed.

[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-mentioned 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 display content control methods described above 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 state of the LED information board. The beneficial effect is that the environmental damage coefficient takes into account the abnormal rise 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 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 A schematic diagram of obtaining fault confidence provided in this application. DETAILED DESCRIPTION

[0031] In the description of the embodiments of the present application, words such as "exemplary", "or", "for example" and the like are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "or", "for example" and the like is intended to present related 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 present application. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present 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 method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the present application, the execution order of 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 controls and adjusts the display content of LED information boards in road traffic. That is, when the LED information board fails, the front device automatically issues a black screen command to promptly turn off the display content of the LED information board to avoid outdated and erroneous information from misleading pedestrians. However, the premise of 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, the present application uses a temperature sensor, a humidity sensor, and a current sensor to collect temperature data, humidity data, and current data during the operation of the LED information board, wherein the data acquisition cycle is 1s. 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 the best working state. Therefore, in this embodiment, the working environment temperature is set to 25°C and the humidity is set to 40% RH. The implementer can adjust it according to the actual situation, and this application does not limit this.

[0038] In order to prevent data loss in the collected data, the collected data is used as input and preprocessed using the mean filling algorithm. Further, for the convenience of analysis, this application uses the Z-score normalization method to preprocess the collected data to eliminate the impact of the dimension. The mean filling method and Z-score normalization are both well-known technologies, and this application will not repeat their implementation process.

[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 fitting 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; obtain the environmental damage coefficient at each moment by combining the temperature change rate and average temperature deviation at each moment, combined with the difference between the humidity data at each moment and the preset ideal humidity.

[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. The effectiveness and real-time nature of the content displayed on the LED information board. Traditional fault location methods usually require staff to use the elimination method 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 a fault. Therefore, this application first monitors the operating status of the LED information board.

[0041] LED information boards are affected by many unfavorable factors due to their long-term operation in outdoor environments with complex traffic. Among them, the dust brought by passing vehicles is a significant problem, and the dust will be deposited inside the LED information board. Covering key parts such as circuit boards and electronic components, it will affect its heat dissipation effect, causing the temperature to rise, and high temperature will damage the circuit boards and electronic components, accelerating the aging speed of the LED information board; too low temperature may cause the LED information board to fail to work properly, and when the LED information board is in a high or low temperature state for a long time, it will cause permanent damage. Secondly, when the humidity in the air is high, it will further increase the hygroscopicity of the dust, and moist dust is more conductive, which will cause the LED information board to have a short circuit risk. In addition, in a humid environment, it will aggravate the corrosion of the internal components of the LED information board, and short circuits and corrosion will further increase the temperature of the LED information board. Therefore, the present application first obtains the temperature data and humidity data monitored at each moment and a preset number of moments before, and records them as a temperature data sequence and a 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 straight line fitting on the temperature data at each moment and the preset number of moments before, and obtain the temperature change rate at each moment based on the trend characteristics of the fitting straight line:

[0043] Specifically, when the LED information board is in normal working state, its temperature is within the normal working temperature range. When dust accumulation is serious, the temperature will continue to rise as the LED information board continues to operate due to the inability to dissipate heat in time. Therefore, this application uses the temperature data sequence at each moment as input, and uses the least squares linear fitting algorithm to perform straight line fitting to obtain the absolute value of the fitting slope, which is 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 fail due to continuous 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 belongs to a well-known technology, and this application will no longer describe its implementation process in detail.

[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; take the average value of the first differences corresponding to all temperature data 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] In addition, considering the influence of humidity in the air on the working state of the LED information board, specifically, a high humidity environment may cause short circuit or corrosion of the LED information board, and the short circuit and corrosion phenomenon will further aggravate the temperature rise of the LED information board, thereby increasing the 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 tth 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 working process due to the ambient temperature and its own heating, the calculated temperature change rate of the LED information board at the t moment becomes larger. Furthermore, 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 the t moment becomes. In addition, the environment will also affect the working state of the LED information board. When the 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 the t moment, 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 three: perform threshold segmentation on the current data at each moment and a preset number of moments before to obtain the current discreteness at each moment; analyze the degree of confusion and autocorrelation of the current data at each moment and a preset number of moments before, and combine the current discreteness and the environmental damage coefficient to obtain the fault confidence at each moment.

[0050] Temperature changes will also affect the stability of the content displayed on the LED information board. Specifically, since the LED information board is more sensitive to temperature changes, the rise in temperature will reduce the operating voltage of the LED information board. For the LED information board, the current and voltage passing through the semiconductor light-emitting diode are nonlinear. A small change in voltage will cause a sharp change in current. In addition, the brightness of the semiconductor light-emitting diode is closely related to the magnitude of the current. Therefore, the temperature change of the LED information board will eventually affect the brightness change of the semiconductor light-emitting diode.

[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, in the actual operation of the LED information board, affected by the ambient temperature and humidity and the electrothermal conversion during its own operation, the current of the LED information board cannot always be in a constant state. Therefore, the present application further obtains the current data monitored at each moment and the previous preset number of moments, and records it as the 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 the previous preset number of moments 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 operation, 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 in a stable state due to the influence of temperature, which makes the calculated current dispersion value larger, indicating that the LED information board is more affected by temperature changes.

[0052] In order to analyze the fluctuation of the current in the semiconductor light emitting diode at each moment, the information entropy of the data in the current data sequence at each moment is further calculated. The information entropy represents the volatility and uncertainty of the current data sequence. The larger the value of the information entropy, the more unstable the current flowing through the semiconductor light emitting diode is, and the greater the degree of influence of temperature changes. The calculation of the information entropy belongs to the known technology, and this application will not elaborate on its implementation process.

[0053] In addition, under normal working conditions, the current data of the LED information board is basically in a constant state, with small overall fluctuations, which makes the autocorrelation coefficient of the current data sequence at each moment larger. When the current of the LED information board fluctuates due to temperature changes, the current inside the LED fluctuates irregularly due to the dual influence of ambient temperature changes and the current regulation mechanism of the LED itself, which makes the autocorrelation coefficient of the current data sequence at each moment smaller. Therefore, the present application obtains the time autocorrelation coefficient of the current data sequence at each moment. In this embodiment, the time lag period is set to 1. The calculation of the time autocorrelation coefficient belongs to the known technology, and the present 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 the tth moment; 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 the tth moment; ACF t represents the autocorrelation coefficient of the current data at the tth moment and the preset number of current data before; β is the preset parameter adjustment factor, where the value range of the time autocorrelation coefficient is [-1,1], and a large adjustment factor will have a greater impact on the evaluation result of the fault confidence. Therefore, when avoiding the denominator to be 0, the adjustment factor is not easy to be too large, so the adjustment factor is a smaller value range. In this embodiment, the adjustment factor is 1.01. Among them, the schematic diagram of fault confidence acquisition is 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 value of the environmental damage coefficient of the LED information board; when the LED information board produces current fluctuations due to the ambient temperature and humidity and its own electrothermal conversion during operation, the greater the current fluctuation, the greater the calculated values ​​of the current discreteness and current information entropy; 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 factor comprehensively considers the abnormal changes in ambient temperature and humidity during the operation of the LED information board and the internal current of the information board, the actual operation status of the LED information board at each monitoring moment can be accurately reflected according to the fault confidence factor, thereby timely adjusting 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. When the LED information board fails in operation, 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 value 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 fail, and the semiconductor light emitting diode array is more likely to display error information. At this time, the black screen instruction is executed to avoid outdated information and error information from 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 method embodiment 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 display content control methods described above is implemented.

[0061] To summarize, 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 the environmental damage coefficient based on the influence of the changes in ambient temperature and humidity on the working state 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 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 abnormal detection algorithm, the actual operation 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 architecture, functions and operations of the system, method and computer program product according to the embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing 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, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and block diagram 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, and 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 functions or actions, 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 protection scope 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; Perform straight line fitting on the temperature data at each moment and the 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 the preset number of moments before and the preset ideal temperature; obtain the environmental damage coefficient at each moment by combining the temperature change rate and the average temperature deviation at each moment, and the difference between the humidity data at each moment and the preset ideal humidity; 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 confusion and autocorrelation of the current data at each moment and a preset number of moments before, 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. A method for controlling the display content of an LED information board as claimed in claim 1, characterized in that: 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, characterized in that: The average temperature deviation at each moment is obtained as follows: The differences between the temperature data at each moment and the preset number of moments before and the preset ideal temperature are calculated and recorded as the first difference; the average value of the first differences corresponding to all temperature data is taken 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, characterized in that: The environmental damage coefficient at each moment is obtained as follows: 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; 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.

5. The method for controlling the display content of an LED information board according to claim 1, characterized in that: 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 an abnormal current set, and the set of current data with current values ​​less than or equal to the segmentation threshold is recorded as a normal current set; Calculate the means 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.

6. A method for controlling the display content of an LED information board as claimed in claim 1, characterized in that: The fault confidence at each moment is specifically obtained as follows: Where, CLF t represents the fault confidence at the tth moment; 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 the tth moment; ACF t represents the autocorrelation coefficient of the current data at the tth moment and the preset number of times before; β is the preset parameter adjustment factor.

7. A method for controlling the display content of an LED information board as claimed in claim 1, characterized in that: The method of judging whether the display content of the LED information board is abnormal based on the fault confidence level is specifically as follows: An abnormality 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.

8. The method for controlling the display content of an LED information board according to claim 1, characterized in that: If there is an abnormality, the display content is controlled, specifically: a black screen command is executed.

9. A display content control device for 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 8 are implemented.

10. 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 8 is implemented.

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