Intelligent advertising board monitoring system based on Internet of Things

Abstract

The invention relates to the technical field of advertising board safety monitoring, in particular to an intelligent advertising board monitoring system based on the Internet of Things, which comprises a data acquisition module used for acquiring advertising board data and environment data, and a stability monitoring module used for analyzing the stability of an advertising board; the corrosion analysis module is used for analyzing the corrosion characteristics of the advertising board and updating the analysis process of the stable state of the advertising board in the next management period according to the corrosion characteristics of the advertising board, the wind speed characteristic analysis module is used for analyzing the environment wind speed characteristics, and the safety monitoring module is used for monitoring the safety of the advertising board. The monitoring module is used for monitoring the safety state of the billboard according to the analysis result of the stability of the billboard in each monitoring period in the management period, the corrosion characteristics of the billboard, the environmental wind speed characteristics, the environmental humidity and the environmental chloride ion concentration, and the storage module is used for storing abnormal early warning records and maintenance prompt records in the management period. The safety monitoring efficiency of the advertising board is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of billboard safety monitoring, and particularly to an intelligent billboard monitoring system based on the Internet of Things. Background Art

[0002] In recent years, with the acceleration of the urbanization process and the development of the advertising industry, outdoor billboards have been widely used. However, over time and under the influence of the natural environment, the safety and stability problems of billboards have gradually emerged. Outdoor billboards are usually exposed to harsh environments such as wind, rain, sunlight, and salt spray, and are easily affected by factors such as corrosion, wear, and wind force. Therefore, ensuring the safety of these facilities and timely maintenance have become important tasks for urban management and advertising operations.

[0003] Chinese Patent Publication No. CN112291360A discloses a billboard monitoring system for monitoring a billboard installed on a wall by relying on a fixing member. The billboard monitoring system includes a wireless accelerometer, a cloud platform analysis system, and a client device; at least one of the fixing member and the billboard is installed with the wireless accelerometer; the billboard monitoring system simultaneously compares the relationship curve of the amplitude value changing with time and the relationship curve of the amplitude value changing with frequency in the current specific environment with the relationship curve of the amplitude value changing with time and the relationship curve of the amplitude value changing with frequency sampled in the same environment in the initial trial operation state to determine whether the billboard has a risk of falling, and in addition to making an early prediction when a risk occurs, it also simultaneously performs real-time alarm by sensing the inclination angle change through the wireless accelerometer. This billboard monitoring system can effectively perform early prediction of disasters and real-time alarm on the billboard, can effectively save monitoring costs and time, and is convenient for installation and implementation; thus, it can be seen that when this solution performs safety monitoring on the billboard, it only analyzes vibration and inclination angle, and there is a problem of low billboard monitoring efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent billboard monitoring system based on the Internet of Things to solve at least one of the problems existing in the prior art.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An intelligent billboard monitoring system based on the Internet of Things, comprising:

[0007] The stability monitoring module is used to analyze the stability of the billboard based on the stress of the billboard support and the vibration rate of the billboard support collected within the monitoring period, and give an early warning to the user for the abnormal stability state of the billboard; the stability monitoring module includes a vibration monitoring unit, a stress monitoring unit and a stability analysis unit. The vibration monitoring unit is used to analyze the abnormal vibration characteristics of the billboard based on the vibration rate of the billboard support collected within the monitoring period. The stress monitoring unit is used to analyze the abnormal stress characteristics of the billboard based on the stress of the billboard support collected within the monitoring period. The stability analysis unit is used to analyze the stability state of the billboard based on the analysis results of the abnormal vibration characteristics and stress characteristics of the billboard within the monitoring period;

[0008] The corrosion analysis module is used to analyze the corrosion characteristics of the billboard based on the corrosion rate of the billboard support collected within the management period, and update the analysis process of the stability state of the billboard in the next management period;

[0009] The wind speed characteristic analysis module is used to analyze the average wind speed and the fluctuation characteristics of the environmental wind speed based on the environmental wind speed within the management period to determine the environmental wind speed characteristics.

[0010] Further, it also includes a safety monitoring module, which is used to monitor the safety state of the billboard based on the analysis results of the stability of the billboard in each monitoring period within the management period, the corrosion characteristics of the billboard, the environmental wind speed characteristics, the environmental humidity and the environmental chloride ion concentration.

[0011] Further, the vibration monitoring unit sorts the vibration rates of each billboard support collected within the monitoring period in descending order, records the maximum value as Vmax, and the minimum value as Vmin;

[0012] The vibration monitoring unit analyzes the abnormal vibration characteristics ZT of the billboard according to the vibration rate Vi of the i-th billboard support collected within the monitoring period, the number of vibration monitoring points of the billboard support, the preset vibration threshold Vy, Vmax, and Vmin;

[0013] The stress monitoring unit calculates the average value Lp of the stress of the billboard support according to the stress of the billboard support collected within the monitoring period, and analyzes the abnormal stress characteristics of the billboard based on the average value Lp of the stress of the billboard support and the preset stress L0 to obtain the stress characteristics of the billboard.

[0014] Further, the stability analysis unit analyzes the stability state of the billboard based on the analysis results of the abnormal vibration characteristics and stress characteristics of the billboard within the monitoring period. The stability state of the billboard includes stable and abnormal;

[0015] When the stability state of the billboard is abnormal, the stability analysis unit sends an early warning of the abnormal stability state of the billboard to the user.

[0016] Further, the corrosion analysis module analyzes the corrosion state of the billboard according to the corrosion rate f0 of the billboard bracket collected within the management period and the preset corrosion rate f1, and sets the corrosion characteristics of the billboard according to the corrosion state of the billboard.

[0017] When the corrosion state of the billboard is an abnormal state, the corrosion analysis module updates the analysis process of the billboard stability state in the next management period, and sets the updated preset stability threshold as u0'.

[0018] Further, the wind speed feature analysis module includes a wind speed analysis unit for calculating the average wind speed Fp according to the environmental wind speed collected within the management period and extracting the environmental wind speed fluctuation feature B.

[0019] Further, the wind speed feature analysis module further includes a feature analysis unit. The feature analysis unit analyzes the wind speed state within the management period according to the average wind speed Fp and the preset wind speed FO. The wind speed state includes normal and abnormal.

[0020] The feature analysis unit analyzes the environmental wind speed feature according to the wind speed state and the environmental wind speed fluctuation feature. If the wind speed state is normal, the feature analysis unit sets the environmental wind speed feature as FB1 and sets FB1 = B; if the wind speed state is abnormal, the feature analysis unit sets the environmental wind speed feature as FB2 and sets FB2 = ln[4×(Fp - F0) / (Fp + F0)+1] / ln5 + B.

[0021] Further, the safety monitoring module includes a safety monitoring unit. The safety monitoring unit is used to count the number E1 of monitoring periods in which the billboard stability state is abnormal within the management period and the number E0 of monitoring periods within the management period, and monitors the safety state of the billboard according to the corrosion characteristics and environmental wind speed characteristics of the billboard, where:

[0022] If x1×E1 / E0 + x2×the corrosion characteristics of the billboard + x3×the environmental wind speed characteristic ≤ R, the safety monitoring unit determines that the safety state of the billboard in the current management period is safe; otherwise, the safety monitoring unit determines that the safety state of the billboard in the current management period is unsafe.

[0023] Wherein, x1 is the stability state weight, x2 is the corrosion weight, x3 is the wind speed weight, and R is the preset judgment threshold.

[0024] Further, the safety monitoring module further includes a salt spray analysis unit. The salt spray analysis unit analyzes the environmental salt spray state according to the chloride ion concentration z0 collected within the management period and the preset chloride ion concentration z1. The environmental salt spray state includes normal and abnormal.

[0025] When the environmental salt spray state is abnormal, the salt spray analysis unit further processes the monitoring process of the billboard safety state, improves the preset judgment threshold required in the processing process, and sets the improved preset judgment threshold as R1.

[0026] Further, the safety monitoring module further includes a humidity analysis unit. The humidity analysis unit analyzes the environmental humidity state according to the environmental humidity s0 collected within the management cycle and the preset humidity s1. The environmental humidity state includes a normal state and a high humidity state;

[0027] When the environmental humidity state is in a high humidity state, the humidity analysis unit further processes the analysis process of the environmental salt spray state, and sets the processed preset chloride ion concentration as z2.

[0028] The beneficial effects of the present invention are as follows: The data acquisition module uses a variety of sensors to accurately monitor key parameters such as the corrosion rate, stress, vibration of the billboard bracket, and the chloride ion concentration, humidity, and wind speed of the environment in real time. This all-round data acquisition provides a reliable basis for subsequent analysis; The vibration and stress monitoring units in the stable monitoring module can timely identify abnormal situations caused by external interference, reduce the risk of structural damage. At the same time, the corrosion analysis module ensures the service life of the billboard by dynamically monitoring the corrosion state, thereby reducing maintenance costs. The wind speed characteristic analysis module can evaluate the impact of wind speed on stability in real time, providing early warnings for safety in bad weather. The safety monitoring module comprehensively analyzes various abnormal data, quickly judges the overall safety state, and sends maintenance prompts in time when potential risks are found to ensure the safety of pedestrians and property. In addition, the storage module systematically records all historical data, providing a reference basis for future maintenance decisions; Through the coordinated action of each module, the efficiency of billboard safety monitoring is improved. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the intelligent billboard monitoring system based on the Internet of Things in this embodiment.

[0031] Figure 2 It is a schematic structural diagram of the stable monitoring module in this embodiment.

[0032] Figure 3 It is a schematic structural diagram of the wind speed characteristic analysis module in this embodiment.

[0033] Figure 4 This is a schematic structural diagram of the safety monitoring module in this embodiment. Detailed implementation manners

[0034] To describe the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and the accompanying drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0035] It should be noted that although terms such as first, second, and third may be used in the embodiments of the present application for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0036] Please refer to Figure 1 as shown, which is a schematic structural diagram of the intelligent billboard monitoring system based on the Internet of Things in this embodiment. The system includes

[0037] A data acquisition module for acquiring billboard data and environmental data. The billboard data includes the corrosion rate of the billboard bracket, the stress of the billboard bracket, and the vibration rate of the billboard bracket. The environmental data includes the environmental chloride ion concentration, environmental humidity, and environmental wind speed. The corrosion rate of the advertisement bracket is the corrosion rate of the advertisement bracket thickness. In this embodiment, the acquisition methods of the billboard data and environmental data are not specifically limited, and those skilled in the art can freely set them as long as the acquisition requirements of the billboard data and environmental data are met. Among them, several vibration monitoring points, stress monitoring points, and corrosion monitoring points can be set on the billboard bracket. The corrosion rate of the billboard bracket is acquired by the electromagnetic induction method, the stress of the billboard bracket is acquired by a force sensor, the vibration rate of the billboard bracket is acquired by a vibration rate sensor, the environmental chloride ion concentration is acquired by an ion concentration monitor, the environmental humidity is acquired by a humidity sensor, and the environmental wind speed is acquired by an ultrasonic wind speed sensor.

[0038] Please continue to refer to Figure 1 as shown, the system further includes:

[0039] A stability monitoring module for analyzing the stability of the billboard according to the stress of the billboard bracket and the vibration rate of the billboard bracket collected within the monitoring period. It can be understood that in this embodiment, the setting of the monitoring period is not specifically limited, and those skilled in the art can freely set it as long as the setting requirements of the monitoring period are met. Among them, the monitoring period can be set to 1s, 2s, etc.

[0040] Please refer to Figure 2 as shown, the stability monitoring module includes:

[0041] A vibration monitoring unit is used to analyze the vibration abnormal characteristics of the billboard according to the vibration rate of the billboard support collected in the monitoring period, where:

[0042] The vibration monitoring unit sorts the vibration rates of each billboard support collected in the monitoring period in descending order, records the maximum value as Vmax, and the minimum value as Vmin;

[0043] The vibration monitoring unit sets the vibration abnormal characteristic of the billboard in the monitoring period as ZT, and sets: where Vi is the vibration rate of the i-th billboard support collected in the monitoring period, I is the number of vibration monitoring points of the billboard support, and Vy is the preset vibration threshold; the vibration monitoring unit analyzes the vibration abnormal characteristic to quantify the vibration abnormal degree of the billboard, effectively judge the abnormal characteristics of the billboard caused by external disturbances, evaluate the vibration safety, so as to improve the accuracy of the billboard stable state analysis.

[0044] It can be understood that in this embodiment, the setting of the preset vibration threshold is not specifically limited, and those skilled in the art can set it freely as long as the setting requirements of the preset vibration threshold are met. Among them, the best value of Vy is 1m / s.

[0045] Please continue to refer to Figure 2 As shown, the stability monitoring module further includes:

[0046] A stress monitoring unit is used to analyze the stress abnormal characteristics of the billboard according to the stress of the billboard support collected in the monitoring period, where:

[0047] If Lp ≤ L0, the stress monitoring unit determines that the stress of the billboard in the current monitoring period is normal, sets the stress abnormal characteristic as LT1, and sets LT1 = 0. Otherwise, the stress monitoring unit determines that the stress of the billboard in the current monitoring period is abnormal, sets the stress abnormal characteristic as LT2, and sets LT2 = α × lg[(Lp - L0) / (Lp + L0) + 1] / lg2;

[0048] where LP is the average value of the stress of the billboard support collected in the monitoring period, Lk is the stress of the k-th billboard support collected in the monitoring period, K is the number of stress monitoring points of the billboard support, L0 is the preset stress, and α is the preset adjustment ratio; the stress monitoring unit uses the collected stress data to timely judge the bearing condition of the support, help identify potential risks such as overloading or material fatigue, ensure the long-term use safety of the billboard, so as to improve the accuracy of the billboard stable state analysis.

[0049] It can be understood that in this embodiment, the setting of the preset stress is not specifically limited, and those skilled in the art can set it freely as long as the setting requirements of the preset stress are met. Among them, the optimal value of L0 is 200 MPa, and the optimal value of α is 0.45.

[0050] Please continue to refer to Figure 2 as shown, the stability monitoring module further includes:

[0051] A stability analysis unit, which is connected to the vibration monitoring unit and the stress monitoring unit. The stability analysis unit analyzes the stability state of the billboard according to the analysis results of the vibration abnormal characteristics and stress abnormal characteristics of the billboard within the monitoring period, where:

[0052] If ZT + stress abnormal characteristics ≤ u0, the stability analysis unit determines that the stability state of the billboard in the current monitoring period is stable; otherwise, the stability analysis unit determines that the stability state of the billboard in the current monitoring period is abnormal. u0 is a preset stability threshold.

[0053] When the stability state of the billboard is abnormal, the stability analysis unit sends an early warning of the abnormal stability state of the billboard to the user. The stability analysis unit can quickly evaluate the stability state of the billboard through comprehensive vibration and stress abnormal characteristics, and timely warn the management personnel to avoid accidents under harsh conditions.

[0054] It can be understood that in this embodiment, the setting of the preset stability threshold is not specifically limited, and those skilled in the art can set it freely as long as the setting requirements of the preset stability threshold are met. Among them, the optimal value of u0 is 0.3.

[0055] Please continue to refer to Figure 1 as shown, the system further includes:

[0056] A corrosion analysis module, which is used to analyze the corrosion state of the billboard bracket according to the corrosion rate f0 of the billboard bracket collected within the management period and the preset corrosion rate f1, and analyze the corrosion characteristics of the billboard according to the analysis results to quantify the corrosion degree of the billboard bracket, where:

[0057] If f0 ≤ f1, the corrosion analysis module determines that the corrosion state of the billboard in the current management period is in a normal state, sets the corrosion characteristics of the billboard as FT1, and sets FT1 = 0; otherwise, the corrosion analysis module determines that the corrosion state of the billboard in the current management period is in an abnormal state, sets the corrosion characteristics of the billboard as FT2, and sets FT2 = exp[3×(f0 - f1) - 3].

[0058] When the corrosion state of the billboard is in an abnormal state, the corrosion analysis module updates the analysis process of the stable state of the billboard in the next management cycle, and sets the updated preset stability threshold to u0', where u0' = u0 × (1 - FT2 2 ); The corrosion analysis module can accurately calculate the corrosion state of the billboard bracket, dynamically adjust the abnormal state warning of the billboard, prevent the structural failure caused by corrosion in advance, and thus extend the service life of the billboard.

[0059] It can be understood that in this embodiment, the setting of the preset corrosion rate is not specifically limited, and those skilled in the art can freely set it as long as the setting requirements of the preset corrosion rate are met. Among them, the best value of f1 is 0.05; in this embodiment, the setting of the management cycle is not specifically limited, and those skilled in the art can freely set it as long as the setting requirements of the management cycle are met. Among them, the management cycle can be set to 5 minutes, 8 minutes, etc.

[0060] Please continue to refer to Figure 1 as shown, the system further includes:

[0061] A wind speed characteristic analysis module for analyzing the average wind speed and the fluctuation characteristics of the environmental wind speed according to the environmental wind speed within the management cycle, and analyzing the environmental wind speed characteristics according to the analysis results.

[0062] Please refer to Figure 3 as shown, the wind speed characteristic analysis module includes:

[0063] A wind speed analysis unit for calculating the average wind speed Fp according to the environmental wind speed collected within the management cycle, and setting Fj is the jth environmental wind speed data collected within the management cycle, and J is the number of environmental wind speed data collected within the management cycle;

[0064] The wind speed analysis unit analyzes the environmental wind speed fluctuation characteristic B according to the environmental wind speed collected within the management cycle, and sets Through the real-time monitoring of the environmental wind speed, the wind speed analysis unit enables the system to identify the risks of the billboard in strong wind environments, and provides important parameters for subsequent stability assessment by combining the analysis of the steady and fluctuating characteristics.

[0065] Please continue to refer to Figure 3 as shown, the wind speed characteristic analysis module further includes:

[0066] A feature analysis unit, which is connected to the wind speed analysis unit. The feature analysis unit analyzes the wind speed state within the management cycle based on the average wind speed Fp and the preset wind speed FO. If Fp ≤ F0, the feature analysis unit determines that the wind speed state in the current management cycle is normal; if Fp > F0, the feature analysis unit determines that the wind speed state in the current management cycle is abnormal;

[0067] The feature analysis unit analyzes the environmental wind speed characteristics based on the wind speed state and the environmental wind speed fluctuation characteristics within the management cycle, where:

[0068] If the wind speed state is normal, the feature analysis unit sets the environmental wind speed characteristics as FB1 and sets FB1 = B;

[0069] If the wind speed state is abnormal, the feature analysis unit sets the environmental wind speed characteristics as FB2 and sets FB2 = ln[4×(Fp - F0) / (Fp + F0)+1] / ln5 + B; the feature analysis unit analyzes the wind speed characteristics based on the average wind speed state and the wind speed fluctuation, effectively reducing the structural damage caused by excessive wind speed, ensuring that the billboard stands safely and stably in bad weather, thereby improving the safety monitoring efficiency of the billboard.

[0070] It can be understood that in this embodiment, the setting of the preset wind speed is not specifically limited, and those skilled in the art can freely set it as long as the setting requirements of the preset wind speed are met. Among them, the best value of F0 is 10m / s.

[0071] Please continue to refer to Figure 1 as shown, the system further includes:

[0072] A safety monitoring module, used to monitor the safety state of the billboard based on the analysis results of the stability of the billboard in each monitoring cycle within the management cycle, the corrosion characteristics of the billboard, the environmental wind speed characteristics, the environmental humidity, and the environmental chloride ion concentration.

[0073] Please refer to Figure 4 as shown, the safety monitoring module includes:

[0074] A safety monitoring unit, used to monitor the safety state of the billboard based on the analysis results of the stability of the billboard in each monitoring cycle within the management cycle, the corrosion characteristics of the billboard, and the environmental wind speed characteristics, where:

[0075] If x1×E1 / E0 + x2×the corrosion characteristics of the billboard + x3×the environmental wind speed characteristics ≤ R, the safety monitoring unit determines that the safety state of the billboard in the current management cycle is safe; otherwise, the safety monitoring unit determines that the safety state of the billboard in the current management cycle is unsafe;

[0076] Among them, x1 is the steady state weight, x2 is the corrosion weight, x3 is the wind speed weight, x1 + x2 + x3 = 1, R is the preset judgment threshold, E1 is the number of monitoring cycles in which the steady state of the billboard is abnormal during the management cycle, and E0 is the number of monitoring cycles during the management cycle; the safety monitoring unit comprehensively analyzes various abnormal data of the billboard, intelligently evaluates the overall safety status, and once discovers unsafe factors, it sends a maintenance prompt in a timely manner, can quickly take measures to avoid accidents, and ensure the safety of surrounding pedestrians and property;

[0077] When the safety status of the billboard is unsafe, the safety monitoring unit sends a maintenance prompt for the billboard to the user.

[0078] It can be understood that in this embodiment, the settings of each weight and the preset judgment threshold are not specifically limited, and those skilled in the art can freely set them as long as the setting requirements of each weight and the preset judgment threshold are met. Among them, the best value of x1 is 0.6, the best value of x2 is 0.2, the best value of x3 is 0.2, and the best value of R is 0.26.

[0079] Please continue to refer to Figure 4 As shown, the safety monitoring module further includes:

[0080] A salt spray analysis unit, which is connected to the safety monitoring unit. The salt spray analysis unit analyzes the environmental salt spray state according to the chlorine ion concentration z0 collected during the management cycle and the preset chlorine ion concentration z1, where:

[0081] If z0 ≤ z1, the salt spray analysis unit determines that the environmental salt spray state in the current management cycle is normal; otherwise, the salt spray analysis unit determines that the environmental salt spray state in the current management cycle is abnormal;

[0082] When the environmental salt spray state is abnormal, the salt spray analysis unit processes the monitoring process of the billboard safety state, sets the processed preset judgment threshold as R1, and sets R1 = R × exp[-(z0 - z1) / (z0 + z1)]; the salt spray analysis unit evaluates the corrosion effect of the environmental salt spray on the billboard, thereby dynamically adjusting the subsequent monitoring threshold, enhancing the adaptability of the system in a high-corrosion environment, and improving the safety monitoring efficiency of the billboard.

[0083] It can be understood that in this embodiment, the setting of the preset chlorine ion concentration is not specifically limited, and those skilled in the art can freely set it as long as the setting requirements of the preset chlorine ion concentration are met. Among them, the best value of z1 is 0.5mg / m 3 .

[0084] Please continue to refer to Figure 4 As shown, the safety monitoring module further includes:

[0085] A humidity analysis unit, which is connected to the salt spray analysis unit. The humidity analysis unit analyzes the environmental humidity state based on the environmental humidity s0 collected within the management cycle and the preset humidity s1, where:

[0086] If s0 ≤ s1, the humidity analysis unit determines that the environmental humidity state in the current management cycle is in a normal state; otherwise, the humidity analysis unit determines that the environmental humidity state in the current management cycle is in a high humidity state.

[0087] When the environmental humidity state is in a high humidity state, the humidity analysis unit processes the analysis process of the environmental salt spray state, and sets the preset chloride ion concentration after processing as z2, where z2 = z1 × [1 - η × (s0 - s1) / s1], and η is a preset correction ratio coefficient. The humidity analysis unit monitors the environmental humidity and adjusts the analysis process of the salt spray state when the humidity state is abnormal, so as to reduce the impact of high humidity on the safety monitoring of the billboard, avoid the aggravation of corrosion caused by high humidity, and actively monitor the safety of the billboard.

[0088] It can be understood that in this embodiment, the settings of the preset humidity and the preset correction ratio coefficient are not specifically limited, and those skilled in the art can freely set them as long as the setting requirements of the preset humidity and the preset correction ratio coefficient are met. Among them, the best value of s1 is 80%, and the best value of η is 0.21.

[0089] Please continue to refer to Figure 1 As shown, the system further includes:

[0090] A storage module for storing the abnormal warning records and maintenance prompt records within the management cycle. The storage module archives all abnormal warning and maintenance prompt information in the system, which is convenient for subsequent management personnel to consult and analyze. The accumulation of historical data not only helps to evaluate the long-term health status of the billboard, but also provides an important reference basis for future maintenance decisions.

[0091] Specifically, in this embodiment, the storage method is not specifically limited, and those skilled in the art can freely set it as long as the storage requirements are met. Among them, edge computing devices can be deployed locally to perform lightweight compression on the original sensing data, package the data through combined storage processing, and securely upload the packaged monitoring data to the cloud server through the MQTT protocol or the HTTPS network protocol. The cloud uses an object storage service to store the packaged data in the cloud storage device.

[0092] Specifically, the system described in this embodiment is mainly applicable to the safety monitoring of outdoor billboards, especially in scenarios with harsh environments such as high salt fog, high humidity, and strong winds in coastal areas. Aiming at the risks of billboard falling or structural instability caused by corrosion, wind load, and vibration, the Internet of Things technology is used to achieve comprehensive monitoring of parameters such as bracket corrosion, vibration, stress, environmental salt fog, humidity, and wind speed. The applicable scenarios include roadside billboards in urban streets, highway billboards, and building billboards in coastal cities, etc.

[0093] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to list all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. An intelligent billboard monitoring system based on the Internet of Things, characterized in that: include: A stability monitoring module is used to analyze the stability of the billboard according to the billboard support stress and billboard support vibration rate collected during the monitoring period, and to warn the user of abnormal stability state of the billboard; the stability monitoring module includes a vibration monitoring unit, a stress monitoring unit and a stability analysis unit, the vibration monitoring unit is used to analyze the abnormal vibration characteristics of the billboard according to the billboard support vibration rate collected during the monitoring period, the stress monitoring unit is used to analyze the abnormal stress characteristics of the billboard according to the billboard support stress collected during the monitoring period, and the stability analysis unit is used to analyze the stability of the billboard according to the analysis results of the abnormal vibration characteristics and stress abnormal characteristics of the billboard during the monitoring period; A corrosion analysis module is used to analyze the corrosion characteristics of the billboard according to the corrosion rate of the billboard support collected during the management cycle, and to update the analysis process of the stable state of the billboard in the next management cycle; The wind speed characteristic analysis module is used to analyze the average wind speed and the environmental wind speed fluctuation characteristics according to the environmental wind speed within the management period to determine the environmental wind speed characteristics.

2. The smart billboard monitoring system based on the Internet of Things according to claim 1 is characterized in that: It also includes a safety monitoring module for monitoring the safety status of the billboard based on the analysis results of the billboard's stability in each monitoring period within the management period, the billboard's corrosion characteristics, environmental wind speed characteristics, environmental humidity and environmental chloride ion concentration.

3. The smart billboard monitoring system based on the Internet of Things according to claim 2 is characterized in that: The vibration monitoring unit sorts the vibration rates of each billboard support collected during the monitoring period in descending order, and records the maximum value as Vmax and the minimum value as Vmin; The vibration monitoring unit analyzes the abnormal vibration characteristic ZT of the billboard according to the vibration rate Vi of the i-th billboard support collected during the monitoring period, the number of vibration monitoring points of the billboard support, and the preset vibration thresholds Vy, Vmax, and Vmin; The stress monitoring unit calculates an average value Lp of the billboard support stress based on the billboard support stress collected during the monitoring period, and analyzes the stress abnormality characteristics of the billboard based on the average value Lp of the billboard support stress and the preset stress L0 to obtain the stress characteristics of the billboard.

4. The smart billboard monitoring system based on the Internet of Things according to claim 3 is characterized in that: The stability analysis unit analyzes the stability state of the billboard according to the analysis results of the abnormal vibration characteristics and the abnormal stress characteristics of the billboard during the monitoring period, and the stable state of the billboard includes stability and abnormality; When the stability state of the billboard is abnormal, the stability analysis unit sends an abnormal warning of the stability state of the billboard to the user.

5. The smart billboard monitoring system based on the Internet of Things according to claim 4 is characterized in that: The corrosion analysis module analyzes the corrosion state of the billboard according to the billboard support corrosion rate f0 and the preset corrosion rate f1 collected during the management period, and sets the corrosion characteristics of the billboard according to the corrosion state of the billboard; The corrosion analysis module updates the analysis process of the stable state of the billboard in the next management period when the corrosion state of the billboard is abnormal, and sets the updated preset stable threshold value to u0'.

6. The smart billboard monitoring system based on the Internet of Things according to claim 5 is characterized in that: The wind speed characteristic analysis module includes a wind speed analysis unit, which is used to calculate the average wind speed Fp according to the environmental wind speed collected during the management period, and extract the environmental wind speed fluctuation characteristic B.

7. The smart billboard monitoring system based on the Internet of Things according to claim 6 is characterized in that: The wind speed characteristic analysis module also includes a characteristic analysis unit, which analyzes the wind speed state within the management period according to the average wind speed Fp and the preset wind speed FO, and the wind speed state includes normal and abnormal; The feature analysis unit analyzes the environmental wind speed feature according to the wind speed state and the environmental wind speed fluctuation feature. If the wind speed state is normal, the feature analysis unit sets the environmental wind speed feature to FB1, and sets FB1=B; if the wind speed state is abnormal, the feature analysis unit sets the environmental wind speed feature to FB2, and sets FB2=ln[4×(Fp-F0) / (Fp+F0)+1] / ln5+B.

8. The smart billboard monitoring system based on the Internet of Things according to claim 7 is characterized in that: The safety monitoring module includes a safety monitoring unit, which is used to count the number of monitoring periods E1 in which the stable state of the billboard is abnormal within the management period and the number of monitoring periods E0 within the management period, and monitor the safety state of the billboard according to the corrosion characteristics of the billboard and the environmental wind speed characteristics, wherein: If x1×E1 / E0+x2×corrosion characteristics of billboard+x3×environmental wind speed characteristics≤R, the safety monitoring unit determines that the safety status of the billboard in the current management period is safe; otherwise, the safety monitoring unit determines that the safety status of the billboard in the current management period is unsafe; Among them, x1 is the stable state weight, x2 is the corrosion weight, x3 is the wind speed weight, and R is the preset judgment threshold.

9. The smart billboard monitoring system based on the Internet of Things according to claim 8, characterized in that: The safety monitoring module also includes a salt spray analysis unit, which analyzes the environmental salt spray state according to the chloride ion concentration z0 collected during the management period and the preset chloride ion concentration z1, and the environmental salt spray state includes normal and abnormal; The salt fog analysis unit further processes the monitoring process of the billboard safety state when the environmental salt fog state is abnormal, and improves the preset judgment threshold required in the processing process, and sets the improved preset judgment threshold to R1.

10. The smart billboard monitoring system based on the Internet of Things according to claim 9, characterized in that: The safety monitoring module also includes a humidity analysis unit, which analyzes the ambient humidity state according to the ambient humidity s0 collected during the management period and the preset humidity s1, and the ambient humidity state includes a normal state and a high humidity state; The humidity analysis unit further processes the analysis process of the environmental salt spray state when the environmental humidity state is a high humidity state, and sets the processed preset chloride ion concentration to z2.

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