Display screen power supply fault detection method and system

Abstract

The invention relates to the field of fault detection, and discloses a display screen power supply fault detection method and system, which is used for solving the problem that early warning is mistakenly touched due to environment temperature change during display screen power supply fault detection, and comprises the following steps: acquiring power supply temperature data, power supply current data and power supply voltage data in real time; evaluating to obtain a temperature stability coefficient, a current stability coefficient and a voltage stability coefficient, performing first fault judgment, evaluating to obtain a power supply fault index if the first fault judgment judges that the current power supply does not have a fault, performing second fault judgment, and acquiring an environment temperature in real time if the second fault judgment judges that the current power supply has a fault; the fault threshold value is dynamically adjusted in real time according to the environment temperature, the fault adjustment threshold value is obtained, third-time fault judgment is carried out, if it is judged that the current power supply breaks down, related workers are prompted that the power supply breaks down, and the accuracy of fault detection is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of fault detection, and more particularly to a display screen power supply fault detection method and system. Background Art

[0002] With the rapid development of display technology, display screens are widely used in various devices and places. Power failure monitoring of display screens is one of the key technologies to ensure their normal operation. The power failure monitoring system often relies on the detection of power supply output voltage, current, temperature and other parameters. However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems: In actual applications, the environment in which the display screen power supply is located may change dynamically. When the ambient temperature is too high, the power supply overheat protection mechanism may be triggered, causing temporary instability in the power supply. This change may sometimes be misjudged as a fault in the power supply itself, causing a false alarm and affecting the accuracy of fault detection. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a display screen power failure detection method and system to solve the problems existing in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A display screen power failure detection method comprises the following steps: Step 1: Setting temperature sensors in the power supply and display screen area, which are denoted as a first temperature sensor and a second temperature sensor, and setting a power sensor in the power supply, wherein the power sensor comprises a current sensor and a voltage sensor; Step 2: Real-time acquisition of power supply temperature data through the first temperature sensor, real-time acquisition of power supply current data and power supply voltage data through the power sensor, and timestamping the power supply temperature data, power supply current data and power supply voltage data, and saving them in a database; Step 3: Evaluating and obtaining a temperature stability coefficient according to the power supply temperature data in the database; Evaluating and obtaining a current stability coefficient according to the power supply current data in the database; and Evaluating and obtaining a voltage stability coefficient according to the power supply voltage data in the database; Step 4: Setting a maximum stability threshold, wherein the maximum stability threshold comprises a maximum The highest temperature stability value, the highest current stability value and the highest voltage stability value are used to make the first fault judgment according to the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient; Step 5: If the first fault judgment shows that the current power supply has not failed, the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient are comprehensively evaluated to obtain the power supply fault index, set the fault threshold, and make the second fault judgment according to the power supply fault index and the fault threshold; Step 6: If the second fault judgment shows that the current power supply has failed, the ambient temperature is obtained in real time according to the second temperature sensor, the fault threshold is dynamically adjusted in real time according to the ambient temperature, the fault adjustment threshold is obtained, and the third fault judgment is made according to the power supply fault index and the fault adjustment threshold. If the current power supply is judged to have failed, the relevant staff is prompted that the power supply has failed, and the power supply is repaired in time.

[0005] Preferably, the temperature stability coefficient acquisition step is: obtain the optimal temperature, set a detection time period, obtain the maximum temperature value and the minimum temperature value in the detection time period from a database, calculate the difference between the maximum temperature value and the minimum temperature value to obtain the temperature fluctuation degree, obtain the real-time temperature, normalize the optimal temperature, real-time temperature and temperature fluctuation degree, and obtain the temperature stability coefficient based on the normalized optimal temperature, real-time temperature and temperature fluctuation degree evaluation.

[0006] Preferably, the current stability coefficient acquisition step is: obtain the optimal current; set a detection time period, obtain the maximum current value and the minimum current value in the detection time period from a database, and calculate the difference between the maximum current value and the minimum current value to obtain the current fluctuation degree; obtain the real-time current, normalize the optimal current, the real-time current and the current fluctuation degree, and obtain the current stability coefficient based on the normalized optimal current, real-time current and the current fluctuation degree.

[0007] Preferably, the voltage stability coefficient acquisition step is: obtain the optimal voltage; set a detection time period, obtain the maximum voltage value and the minimum voltage value in the detection time period from a database, and calculate the difference between the maximum voltage value and the minimum voltage value to obtain the voltage fluctuation degree; obtain the real-time voltage, normalize the optimal voltage, the real-time voltage and the voltage fluctuation degree, and evaluate the normalized optimal voltage, real-time voltage and voltage fluctuation degree to obtain the voltage stability coefficient.

[0008] Preferably, the first fault judgment step based on the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient is: comparing the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient with the highest stability threshold in real time; if there is data ≥ the highest stability threshold, it is judged that the current power supply has failed, and an early warning is issued to remind relevant staff that the power supply has failed; if there is no data ≥ the highest stability threshold, it is judged that the current power supply has not failed, no early warning is issued, and return to step 2 to continue acquiring data.

[0009] Preferably, the second fault judgment step according to the power supply fault index and the fault threshold is: The temperature stability coefficient, the current stability coefficient and the voltage stability coefficient are normalized; the power supply fault index is obtained by evaluating the normalized temperature stability coefficient, the current stability coefficient and the voltage stability coefficient. The specific acquisition steps are as follows: ; In the formula, Expressed as the power failure index, Expressed as the temperature stability coefficient, Expressed as the current stability factor, Expressed as the voltage stability factor, , , It is expressed as the weight coefficient of the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient; the power supply fault index is compared with the fault threshold. If the power supply fault index is ≥ the fault threshold, it is determined that the current power supply has failed; if the power supply fault index is less than the fault threshold, it is determined that the current power supply has not failed, no early warning prompt is issued, and return to step 2 to continue acquiring data.

[0010] Preferably, the step of dynamically adjusting the fault threshold in real time according to the ambient temperature to obtain the fault adjustment threshold is: setting a standard ambient temperature, and calculating the adjustment factor according to the standard ambient temperature and the ambient temperature, and the specific acquisition method is: ; In the formula, Expressed as the adjustment factor, Expressed as a temperature coefficient, it indicates the sensitivity of temperature to the fault threshold. Expressed as ambient temperature, Expressed as standard ambient temperature; The fault adjustment threshold is calculated by multiplying the adjustment factor by the fault threshold.

[0011] Preferably, the third fault judgment step based on the power supply fault index and the fault adjustment threshold is: compare the power supply fault index with the fault adjustment threshold; if the power supply fault index ≥ the fault adjustment threshold, it is judged that the current power supply has a fault; if the power supply fault index is less than the fault threshold, it is judged that the current power supply has not a fault, no early warning prompt is issued, and return to step 2 to continue acquiring data.

[0012] Preferably, the system includes: a sensor setting module, which is used to set temperature sensors in the power supply and display area, which are denoted as the first temperature sensor and the second temperature sensor, and to set a power sensor in the energy belt, wherein the power sensor includes a current sensor and a voltage sensor; a data acquisition module, which is used to obtain the power supply temperature data in real time through the first temperature sensor, and to obtain the power supply current data and the power supply voltage data in real time through the power sensor, and transmit the real-time power supply temperature data, power supply current data and power supply voltage data to the database module; the database module is used to store the real-time power supply temperature data, power supply current data and power supply voltage data; a first fault judgment module, which is used to evaluate the temperature stability coefficient, current stability coefficient and voltage stability coefficient according to the power supply temperature data, power supply current data and power supply voltage data in the database, and to obtain the temperature stability coefficient, current stability coefficient and voltage stability coefficient according to the temperature stability coefficient, current stability coefficient and voltage stability coefficient. The first fault judgment is made based on the current stability coefficient and the voltage stability coefficient. If the first fault judgment is made, the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient are transmitted to the second fault judgment module; the second fault judgment module is used to evaluate the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient to obtain the power supply fault index, set the fault threshold, and make a second fault judgment based on the power supply fault index and the fault threshold. If the second fault judgment is made, the ambient temperature is obtained in real time according to the second temperature sensor, the fault threshold is dynamically adjusted in real time according to the ambient temperature to obtain the fault adjustment threshold, and the fault adjustment threshold is transmitted to the third fault judgment module; the third fault judgment module is used to make a third fault judgment based on the fault adjustment threshold. If it is judged that the current power supply fails, the relevant staff is prompted that the power supply fails, and the power supply is repaired in time.

[0013] Technical effects and advantages of the present invention: The power supply temperature data, power supply current data and power supply voltage data are obtained in real time, and the temperature stability coefficient, current stability coefficient and voltage stability coefficient are evaluated to make the first fault judgment. If the first fault judgment shows that the current power supply has not failed, the power supply fault index is evaluated and a second fault judgment is made. If the second fault judgment shows that the current power supply has failed, the ambient temperature is obtained in real time, and the fault threshold is dynamically adjusted in real time according to the ambient temperature to obtain the fault adjustment threshold. A third fault judgment is made. If the current power supply is judged to have failed, the relevant staff is prompted that the power supply has failed, which effectively improves the accuracy of fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A flow chart of a display screen power failure detection method provided in an embodiment of the present application.

[0015] Figure 2 A structural diagram of a display screen power failure detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The display screen power failure detection method and system involved in the present invention are not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] The present invention provides a display screen power failure detection method, such as Figure 1 As shown, the following steps are included: Step 1: Setting temperature sensors in the power supply and display area, denoted as the first temperature sensor and the second temperature sensor, and setting power sensors in the power supply, the power sensors including current sensors and voltage sensors; A power sensor is a device used to monitor the working status of a power supply, usually consisting of a current sensor and a voltage sensor. The current sensor is used to measure the current changes in the power supply in real time, while the voltage sensor is used to monitor the voltage fluctuations of the power supply output. Through these two sensors, the power sensor can accurately obtain the current and voltage information of the power supply, providing the necessary data support for subsequent fault detection, performance evaluation, and dynamic adjustment. Power sensors play a vital role in the power management system, and can detect abnormal conditions of the power supply in a timely manner, helping to ensure the stable operation and safety of the system.

[0018] Step 2: Acquire power supply temperature data in real time through the first temperature sensor, acquire power supply current data and power supply voltage data in real time through the power sensor, and add timestamps to the power supply temperature data, power supply current data and power supply voltage data, and save them in the database; By acquiring power supply temperature data in real time through the first temperature sensor, acquiring power supply current and voltage data in real time through the power sensor, and timestamping these data and saving them in the database, comprehensive monitoring and data traceability of the power supply operation status can be achieved. The main benefit of this approach is that it can accumulate historical data on power supply temperature, current, and voltage for a long time, making it easier to analyze the performance and stability of the power supply under different conditions. In addition, the application of timestamps ensures the timing of the data, making it easier to quickly locate and analyze faults when they occur, helping engineers trace the causes of faults, discover potential problems, and provide data support for optimizing power management strategies. This method of data recording and storage improves the accuracy and reliability of power management.

[0019] Step 3: Evaluate the temperature stability coefficient based on the power supply temperature data in the database; evaluate the current stability coefficient based on the power supply current data in the database; and evaluate the voltage stability coefficient based on the power supply voltage data in the database; In this embodiment, it should be specifically explained that the steps for obtaining the temperature stability coefficient are: Get the optimal temperature. The optimal temperature is the target temperature when the power supply device operates under ideal conditions. It is usually provided by the manufacturer or determined through actual testing. Set the detection time period, obtain the maximum temperature value and the minimum temperature value in the detection time period from the database, and calculate the difference between the maximum temperature value and the minimum temperature value to obtain the degree of temperature fluctuation; The real-time temperature is obtained, and the optimal temperature, the real-time temperature, and the degree of temperature fluctuation are normalized. The temperature stability coefficient is obtained based on the normalized optimal temperature, the real-time temperature, and the degree of temperature fluctuation. The specific acquisition steps are as follows: ; In the formula, Expressed as the temperature stability coefficient, Expressed as real-time temperature, Expressed as the degree of temperature fluctuation.

[0020] The temperature stability coefficient obtained by evaluating the optimal temperature, real-time temperature, and the degree of temperature fluctuation can more comprehensively reflect the working status and stability of the power supply. By considering the difference between the real-time temperature and the optimal temperature and the amplitude of the temperature fluctuation at the same time, it is possible to effectively evaluate whether the power supply is within the ideal working range. If the temperature fluctuation is large or the real-time temperature deviates far from the optimal temperature, the system can issue an early warning in time to avoid equipment failure or performance degradation caused by abnormal temperature. This evaluation method can improve the accuracy and response speed of fault detection, thereby enhancing the reliability and stability of the system.

[0021] In this embodiment, it should be specifically explained that the steps for obtaining the current stability coefficient are: Get the optimal current. The optimal current is the target current when the power supply device operates under ideal conditions. It is usually provided by the manufacturer or determined through actual testing. Set a detection time period, obtain the maximum current value and the minimum current value in the detection time period from the database, and calculate the difference between the maximum current value and the minimum current value to obtain the current fluctuation degree; The real-time current is obtained, and the optimal current, real-time current, and current fluctuation degree are normalized. The current stability coefficient is obtained based on the optimal current, real-time current, and current fluctuation degree after normalization. The specific acquisition steps are as follows: ; In the formula, Expressed as the current stability factor, Expressed as real-time current, Expressed as the degree of current fluctuation.

[0022] The current stability coefficient is obtained based on the optimal current, real-time current, and the degree of current fluctuation, which can effectively evaluate the current stability and load performance of the power supply. By comprehensively considering the deviation between the real-time current and the optimal current and the amplitude of the current fluctuation, it is possible to accurately determine whether the power supply is in an ideal working state. If the current deviates greatly from the optimal value or the current fluctuation is too large, it may mean that the power supply load is unstable or there is a potential risk of failure. Early warnings are issued in time and necessary adjustments are made. This can improve the operating stability of the system, prevent equipment damage or performance degradation due to abnormal current, and thus improve the reliability and service life of the power supply.

[0023] In this embodiment, it should be specifically explained that the steps of obtaining the voltage stability coefficient are: Get the optimal voltage. The optimal voltage is the target voltage when the power supply device operates under ideal conditions. It is usually provided by the manufacturer or determined through actual testing. Set a detection time period, obtain the maximum voltage value and the minimum voltage value in the detection time period from the database, and calculate the difference between the maximum voltage value and the minimum voltage value to obtain the voltage fluctuation degree; The real-time voltage is obtained, the optimal voltage, the real-time voltage and the voltage fluctuation degree are normalized, and the voltage stability coefficient is obtained by evaluating the normalized optimal voltage, the real-time voltage and the voltage fluctuation degree. The specific acquisition steps are as follows: ; In the formula, Expressed as the voltage stability factor, Expressed as real-time voltage, Expressed as the degree of voltage fluctuation.

[0024] The voltage stability coefficient is obtained based on the optimal voltage, real-time voltage, and voltage fluctuation, which can accurately reflect the voltage stability and working efficiency of the power supply. By comprehensively considering the deviation between the real-time voltage and the optimal voltage, as well as the amplitude of voltage fluctuation, it can be determined whether the power supply is operating within the ideal voltage range. If the voltage deviates greatly from the optimal value or the voltage fluctuation is large, it may cause unstable power output and even affect the normal operation of downstream equipment.

[0025] Step 4: Set the highest stability threshold, which includes the highest temperature stability value, the highest current stability value, and the highest voltage stability value. Perform the first fault judgment based on the temperature stability coefficient, the current stability coefficient, and the voltage stability coefficient. Setting the highest stability threshold and making the first fault judgment based on the temperature stability coefficient, current stability coefficient, and voltage stability coefficient can provide a comprehensive stability evaluation standard for the system. By setting these thresholds, the maximum tolerance range of the system under ideal working conditions can be clearly calibrated to ensure that the equipment operates within the stability range of key parameters such as temperature, current, and voltage. The first fault judgment can be based on the comparison of these stability coefficients with the thresholds to promptly discover abnormal conditions in system operation and avoid equipment failure or damage caused by excessive fluctuations or exceeding the safety range.

[0026] In this embodiment, it should be specifically explained that the first fault judgment step according to the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient is as follows: The temperature stability coefficient, current stability coefficient and voltage stability coefficient are compared with the highest stability threshold in real time. If there is data ≥ the highest stability threshold, it is determined that the current power supply has failed, and an early warning is issued to remind relevant staff that the power supply has failed and to perform power supply maintenance in time; if there is no data ≥ the highest stability threshold, it is determined that the current power supply has not failed, no early warning is issued, and return to step 2 to continue obtaining data.

[0027] Step 5: If the current power supply is not faulty in the first fault judgment, the temperature stability coefficient, current stability coefficient and voltage stability coefficient are comprehensively evaluated to obtain the power supply fault index, and the fault threshold is set. The second fault judgment is performed based on the power supply fault index and the fault threshold; If the first fault judgment shows that the current power supply has not failed, the temperature stability coefficient, current stability coefficient and voltage stability coefficient are comprehensively evaluated to obtain the power supply fault index, and a second fault judgment is made based on the index and the set fault threshold, which can achieve more accurate and hierarchical fault detection. This method can identify more subtle abnormal situations and avoid missing potential fault risks by further integrating multiple stability indicators.

[0028] In this embodiment, it should be specifically explained that the second fault judgment step according to the power supply fault index and the fault threshold is: Normalize the temperature stability coefficient, current stability coefficient and voltage stability coefficient; Normalization can unify parameters of different dimensions and ranges (such as temperature stability coefficient, current stability coefficient and voltage stability coefficient) to the same standard scale, so that they have the same weight and comparability when calculating the power failure index. Through normalization, it is possible to avoid a parameter occupying an unreasonable dominant position in the comprehensive calculation due to its large or small value, thereby improving the accuracy and fairness of the calculation results.

[0029] The power supply failure index is obtained by evaluating the normalized temperature stability coefficient, current stability coefficient, and voltage stability coefficient. The specific acquisition steps are as follows: ; In the formula, Expressed as the power failure index, Expressed as the temperature stability coefficient, when the ambient temperature fluctuates greatly or is in a high temperature environment, the thermal management system inside the power supply may not be able to dissipate heat effectively, causing the power supply components to overheat, thereby causing power supply failure. Therefore, when the temperature stability is poor, the power supply may frequently experience abnormalities such as voltage and current fluctuations, resulting in an increase in the failure index and an increased risk of power supply failure. On the contrary, when the ambient temperature is stable, the temperature fluctuation is small or within the normal range, the operating temperature of the power supply can be maintained within a safe range, which is conducive to the stable output of the power supply and reduces the occurrence of problems such as overheating and overload, thereby reducing the power supply failure index and making the power supply more reliable. It is expressed as the current stability coefficient. When the current stability coefficient is low, it means that the power supply output current fluctuates greatly or is unstable. This may be caused by problems such as excessive power load, power supply aging, system voltage fluctuations, etc. When the current fluctuates greatly, the power supply cannot maintain a stable current supply, which can easily cause the equipment to malfunction, overload or fail, thereby increasing the power supply failure index, indicating that the probability of power supply failure increases; on the contrary, when the current stability coefficient is high, it means that the power supply can provide stable current output, the load response of the power supply is stable, the current fluctuation is small, and the system operation is more reliable. In this case, the power supply failure index is low, and the probability of failure is correspondingly reduced. It is expressed as voltage stability coefficient. When the voltage stability coefficient is low, it means that the output voltage of the power supply fluctuates greatly or is unstable. This is usually caused by factors such as unbalanced power load, equipment failure or design problems of the power supply itself. When the voltage fluctuates greatly, the power supply cannot provide stable voltage, which may cause the equipment to fail to work properly, produce abnormalities of excessively high or too low voltage, and then cause equipment failure, damage or system crash. At this time, the power failure index rises, which means that the risk of power failure increases; on the contrary, when the voltage stability coefficient is high, it means that the power supply can maintain a stable voltage output, the power supply can provide stable voltage under different load conditions, the system runs smoothly, and the equipment gets a stable power supply, thereby reducing the risk of power failure. The failure index is low, which shows that voltage stability is a key factor in ensuring the normal operation of the power supply and reducing the occurrence of failures. , , It is expressed as the weight coefficient of temperature stability coefficient, current stability coefficient and voltage stability coefficient, , , The specific values ​​are determined by professionals according to the actual situation. For example, a1, a2, and a3 can be 0.5, 0.3, and 0.2; The power supply fault index is compared with the fault threshold. If the power supply fault index is ≥ the fault threshold, it is determined that the current power supply has failed. If the power supply fault index is less than the fault threshold, it is determined that the current power supply has not failed, and no warning prompt is given, and return to step 2 to continue acquiring data.

[0030] Step 6: If the second fault determines that the current power supply has failed, the ambient temperature is obtained in real time according to the second temperature sensor, the fault threshold is dynamically adjusted in real time according to the ambient temperature, and the fault adjustment threshold is obtained. A third fault judgment is made according to the power supply fault index and the fault adjustment threshold. If it is determined that the current power supply has failed, the relevant staff is prompted that the power supply has failed and the power supply should be repaired in time.

[0031] Real-time dynamic adjustment of the fault threshold according to the ambient temperature, and a third fault judgment based on the adjusted threshold, can help improve the accuracy and flexibility of fault judgment. When the ambient temperature is too high, the stability of the power supply may be affected, resulting in increased current and voltage fluctuations, thereby increasing the risk of failure. By dynamically adjusting the fault threshold according to the real-time ambient temperature, false alarms caused by ambient temperature changes can be effectively reduced. When the ambient temperature is too high, the adjusted threshold increases, which helps avoid misjudging ambient temperature fluctuations as faults. This method makes the fault detection system more adaptable to the actual working environment and improves the accuracy and timeliness of fault warnings.

[0032] In this embodiment, it should be specifically explained that the fault threshold is adjusted dynamically in real time according to the ambient temperature, and the steps for obtaining the fault adjustment threshold are: Set the standard ambient temperature, and calculate the adjustment factor based on the standard ambient temperature and the ambient temperature. The specific acquisition method is: ; In the formula, Expressed as the adjustment factor, Expressed as a temperature coefficient, it indicates the sensitivity of temperature to the fault threshold. Expressed as ambient temperature, Expressed as standard ambient temperature; The fault adjustment threshold is obtained by multiplying the adjustment factor by the fault threshold. The specific method of obtaining the threshold is as follows: ; In the formula, Denoted as the fault adjustment threshold, Denoted as the fault threshold, Expressed as adjustment factor.

[0033] In this embodiment, it should be specifically explained that the third fault judgment step according to the power supply fault index and the fault adjustment threshold is: The power supply fault index is compared with the fault adjustment threshold. If the power supply fault index is ≥ the fault adjustment threshold, it is determined that the current power supply has failed. If the power supply fault index is less than the fault threshold, it is determined that the current power supply has not failed, and no warning prompt is given, and return to step 2 to continue acquiring data.

[0034] In this embodiment, it should be specifically explained that Figure 2 As shown, a display screen power failure detection system includes: A sensor setting module is used to set temperature sensors in the power supply and display area, which are denoted as the first temperature sensor and the second temperature sensor, and to set power sensors in the energy source, which include current sensors and voltage sensors; A data acquisition module, used to acquire power supply temperature data in real time through a first temperature sensor, acquire power supply current data and power supply voltage data in real time through a power sensor, and transmit the real-time power supply temperature data, power supply current data and power supply voltage data to a database module; A database module, used for storing real-time power supply temperature data, power supply current data and power supply voltage data; A first fault judgment module is used to evaluate the temperature stability coefficient, current stability coefficient and voltage stability coefficient according to the power supply temperature data, power supply current data and power supply voltage data in the database, and perform a first fault judgment according to the temperature stability coefficient, current stability coefficient and voltage stability coefficient. If the first fault judgment is successful, the temperature stability coefficient, current stability coefficient and voltage stability coefficient are transmitted to the second fault judgment module; The second fault judgment module is used to evaluate the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient to obtain the power supply fault index, set the fault threshold, and perform the second fault judgment according to the power supply fault index and the fault threshold. If the second fault judgment is made, the ambient temperature is obtained in real time according to the second temperature sensor, and the fault threshold is dynamically adjusted in real time according to the ambient temperature to obtain the fault adjustment threshold, and the fault adjustment threshold is transmitted to the third fault judgment module; The third fault judgment module is used to make a third fault judgment according to the fault adjustment threshold. If it is judged that the current power supply fails, it will prompt the relevant staff that the power supply fails and perform power supply maintenance in time.

[0035] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0036] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display screen power failure detection method, characterized in that: The following steps are involved: Step 1: Setting temperature sensors in the power supply and display area, denoted as the first temperature sensor and the second temperature sensor, and setting power sensors in the power supply, the power sensors including current sensors and voltage sensors; Step 2: Acquire power supply temperature data in real time through the first temperature sensor, acquire power supply current data and power supply voltage data in real time through the power sensor, and add timestamps to the power supply temperature data, power supply current data and power supply voltage data, and save them in the database; Step 3: Evaluate the temperature stability coefficient according to the power supply temperature data in the database, evaluate the current stability coefficient according to the power supply current data in the database, and evaluate the voltage stability coefficient according to the power supply voltage data in the database; Step 4: Set the highest stability threshold, which includes the highest temperature stability value, the highest current stability value, and the highest voltage stability value. Perform the first fault judgment based on the temperature stability coefficient, the current stability coefficient, and the voltage stability coefficient. Step 5: If the current power supply is not faulty in the first fault judgment, the temperature stability coefficient, current stability coefficient and voltage stability coefficient are comprehensively evaluated to obtain the power supply fault index, and the fault threshold is set. The second fault judgment is performed based on the power supply fault index and the fault threshold; Step 6: If the second fault determines that the current power supply has failed, the ambient temperature is obtained in real time according to the second temperature sensor, the fault threshold is dynamically adjusted in real time according to the ambient temperature, and the fault adjustment threshold is obtained. A third fault judgment is made according to the power supply fault index and the fault adjustment threshold. If it is determined that the current power supply has failed, the relevant staff is prompted that the power supply has failed and the power supply should be repaired in time.

2. A display screen power failure detection method according to claim 1, characterized in that: The temperature stability coefficient acquisition steps are: Get the best temperature; Set the detection time period, obtain the maximum temperature value and the minimum temperature value in the detection time period from the database, and calculate the difference between the maximum temperature value and the minimum temperature value to obtain the degree of temperature fluctuation; The real-time temperature is obtained, the optimal temperature, the real-time temperature and the temperature fluctuation degree are normalized, and the temperature stability coefficient is obtained according to the normalized optimal temperature, the real-time temperature and the temperature fluctuation degree.

3. A display screen power failure detection method according to claim 1, characterized in that: The steps for obtaining the current stability coefficient are: Get the best current; Set a detection time period, obtain the maximum current value and the minimum current value in the detection time period from the database, and calculate the difference between the maximum current value and the minimum current value to obtain the current fluctuation degree; The real-time current is obtained, the optimal current, the real-time current and the current fluctuation degree are normalized, and the current stability coefficient is obtained according to the normalized optimal current, the real-time current and the current fluctuation degree.

4. A display screen power failure detection method according to claim 1, characterized in that: The steps for obtaining the voltage stability coefficient are as follows: Get the best voltage; Set a detection time period, obtain the maximum voltage value and the minimum voltage value in the detection time period from the database, and calculate the difference between the maximum voltage value and the minimum voltage value to obtain the voltage fluctuation degree; The real-time voltage is obtained, the optimal voltage, the real-time voltage and the voltage fluctuation degree are normalized, and the normalized optimal voltage, the real-time voltage and the voltage fluctuation degree are evaluated to obtain a voltage stability coefficient.

5. A display screen power failure detection method according to claim 1, characterized in that: The steps for performing the first fault judgment according to the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient are as follows: The temperature stability coefficient, current stability coefficient and voltage stability coefficient are compared with the highest stability threshold in real time. If there is data ≥ the highest stability threshold, it is determined that the current power supply has failed, and an early warning is issued to remind relevant staff that the power supply has failed. If there is no data ≥ the highest stability threshold, it is determined that the current power supply has not failed, no early warning is issued, and return to step 2 to continue acquiring data.

6. A display screen power failure detection method according to claim 1, characterized in that: The steps of performing a second fault judgment according to the power supply fault index and the fault threshold are as follows: Normalize the temperature stability coefficient, current stability coefficient and voltage stability coefficient; The power supply failure index is obtained by evaluating the normalized temperature stability coefficient, current stability coefficient, and voltage stability coefficient. The specific acquisition steps are as follows: ； In the formula, Expressed as the power failure index, Expressed as the temperature stability coefficient, Expressed as the current stability factor, Expressed as the voltage stability factor, , , It is expressed as the weight coefficient of temperature stability coefficient, current stability coefficient and voltage stability coefficient; The power supply fault index is compared with the fault threshold. If the power supply fault index is ≥ the fault threshold, it is determined that the current power supply has failed. If the power supply fault index is less than the fault threshold, it is determined that the current power supply has not failed, and no warning prompt is given, and return to step 2 to continue acquiring data.

7. A display screen power failure detection method according to claim 1, characterized in that: The steps of dynamically adjusting the fault threshold in real time according to the ambient temperature to obtain the fault adjustment threshold are: Set the standard ambient temperature, and calculate the adjustment factor based on the standard ambient temperature and the ambient temperature. The specific acquisition method is: ； In the formula, Expressed as the adjustment factor, Expressed as a temperature coefficient, it indicates the sensitivity of temperature to the fault threshold. Expressed as ambient temperature, Expressed as standard ambient temperature; The fault adjustment threshold is calculated by multiplying the adjustment factor by the fault threshold.

8. A display screen power failure detection method according to claim 1, characterized in that: The third fault judgment step according to the power supply fault index and the fault adjustment threshold is as follows: The power supply fault index is compared with the fault adjustment threshold. If the power supply fault index is greater than or equal to the fault adjustment threshold, it is determined that the current power supply is faulty. If the power supply fault index is less than the fault threshold, it is determined that the current power supply has not failed, a warning prompt is given without warning, and the process returns to step 2 to continue acquiring data.

9. A display screen power failure detection system, used to implement a display screen power failure detection method according to any one of claims 1 to 8, characterized in that: The system comprises: A sensor setting module is used to set temperature sensors in the power supply and display area, which are denoted as the first temperature sensor and the second temperature sensor, and to set power sensors in the energy source area, which include current sensors and voltage sensors; A data acquisition module, used to acquire power supply temperature data in real time through a first temperature sensor, acquire power supply current data and power supply voltage data in real time through a power sensor, and transmit the real-time power supply temperature data, power supply current data and power supply voltage data to a database module; A database module, used for storing real-time power supply temperature data, power supply current data and power supply voltage data; A first fault judgment module is used to evaluate the temperature stability coefficient, current stability coefficient and voltage stability coefficient according to the power supply temperature data, power supply current data and power supply voltage data in the database, and perform a first fault judgment according to the temperature stability coefficient, current stability coefficient and voltage stability coefficient. If the first fault judgment is successful, the temperature stability coefficient, current stability coefficient and voltage stability coefficient are transmitted to the second fault judgment module; The second fault judgment module is used to evaluate the temperature stability coefficient, the current stability coefficient and the voltage stability coefficient to obtain the power supply fault index, set the fault threshold, and perform the second fault judgment according to the power supply fault index and the fault threshold. If the second fault judgment is made, the ambient temperature is obtained in real time according to the second temperature sensor, and the fault threshold is dynamically adjusted in real time according to the ambient temperature to obtain the fault adjustment threshold, and the fault adjustment threshold is transmitted to the third fault judgment module; The third fault judgment module is used to make a third fault judgment according to the fault adjustment threshold. If it is judged that the current power supply fails, it will prompt the relevant staff that the power supply fails and perform power supply maintenance in time.

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