A membrane structure safety real-time monitoring and early warning system and method

Abstract

The present invention relates to the field of membrane structure monitoring technology, and in particular to a real-time monitoring and early warning system and method for membrane structure safety. The system comprises: a data acquisition module for collecting monitoring data of an air film shed; a communication module, comprising a cache unit for caching the monitoring data; a data processing module for processing and analyzing the monitoring data to output an analysis result; an alarm module for issuing an alarm when the analysis result exceeds a preset threshold; a storage module for storing the monitoring data, the optimization data and the analysis result; and a control module, which is respectively connected to the data acquisition module, the communication module, the data processing module, the alarm module and the storage module, and is used to determine the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air film shed. The present invention improves the stability of early warning for membrane structure monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of membrane structure monitoring, and in particular to a real-time monitoring and early warning system and method for membrane structure safety. Background Art

[0002] In the prior art, with the continuous development of modern construction technology, membrane structure buildings have been widely used in many fields such as stadiums, exhibition halls, storage facilities, etc. due to their unique shape, good light transmittance and large spatial span. Among them, the safety of air-film sheds, as a typical form of membrane structure buildings, has attracted much attention. During the use of air-film sheds, they are faced with the influence of a variety of complex external environmental factors and internal use conditions. Traditional building structure monitoring methods often cannot meet the special needs of air-film shed structure safety monitoring. Therefore, it is of great practical significance to develop a real-time monitoring and early warning system and method specifically for the safety of air-film shed structures.

[0003] Chinese Patent Publication No.: CN107884476A discloses a column membrane module aeration intensity monitoring system based on Arduino controller, comprising: at least one column membrane module, a sound receiving device for monitoring the sound signal generated when the column membrane module is aerated is fixed on the column membrane module, the sound receiving device is connected to the Arduino controller, and the Arduino controller is connected to a display screen for displaying the data of the aeration amount of the column membrane module. It can be seen that the column membrane module aeration intensity monitoring system based on Arduino controller has the problem that the sensor is subjected to the vibration and deformation of the membrane structure during long-term operation, and the internal sensitive elements may suffer from mechanical fatigue, resulting in a decrease in measurement accuracy, thereby causing a decrease in the early warning stability of membrane structure monitoring. Summary of the invention

[0004] To this end, the present invention provides a real-time monitoring and early warning system and method for the safety of membrane structures, so as to overcome the problem in the prior art that, during the long-term operation of the sensor, the vibration and deformation of the membrane structure may cause mechanical fatigue of the internal sensitive elements, resulting in a decrease in measurement accuracy and thus a decrease in the early warning stability of membrane structure monitoring.

[0005] To achieve the above-mentioned purpose, the present invention provides a real-time monitoring and early warning system for membrane structure safety, comprising: a data acquisition module for collecting monitoring data of an air-film shed, comprising a strain sensor connected to the air-film shed for detecting the strain force on the surface of the air-film shed and a vibration sensor connected to the air-film shed for detecting the vibration intensity of the air-film shed; a communication module connected to the data acquisition module, comprising a cache unit for caching the monitoring data and a data transmission unit connected to the cache unit for transmitting the monitoring data to a position to be processed; a data processing module connected to the communication module, for processing and analyzing the monitoring data to output analysis results, comprising a preprocessing unit for preprocessing the monitoring data to output optimized data and a preprocessing unit connected to the preprocessing unit for An analysis unit that analyzes the safety of the air-film shed structure according to the optimization data to output the analysis result; an alarm module, which is connected to the data processing module, and is used to issue an alarm when the analysis result exceeds a preset threshold; a storage module, which is respectively connected to the data acquisition module and the data processing module, and is used to store the monitoring data, the optimization data and the analysis result; a control module, which is respectively connected to the data acquisition module, the communication module, the data processing module, the alarm module and the storage module, and is used to determine the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air-film shed, or determine the cache time of the monitoring data according to the average transmission delay time of the monitoring data, and determine the storage period of the monitoring data according to the vibration intensity of the air-film shed.

[0006] Furthermore, the data acquisition module also includes:

[0007] A temperature sensor is connected to the air film tent and is used to detect the temperature inside the air film tent;

[0008] A humidity sensor is connected to the air film tent and is used to detect the humidity inside the air film tent;

[0009] An anemometer is connected to the air film tent and is used to detect the wind speed at the air film tent.

[0010] Further, the control module is used to determine whether the early warning stability of the membrane structure monitoring meets the requirements according to the fluctuation amplitude of the strain force on the surface of the air film shed. If the fluctuation amplitude of the strain force on the surface of the air film shed is greater than a preset first fluctuation amplitude, it is determined that the early warning stability of the membrane structure monitoring does not meet the requirements;

[0011] When the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, the control module preliminarily determines that the transmission reliability of the membrane structure monitoring data does not meet the requirements, and determines whether the transmission reliability of the membrane structure monitoring data meets the requirements based on the average transmission delay time of the monitoring data.

[0012] Furthermore, the control module increases the sampling frequency of the strain sensor when the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset second fluctuation amplitude;

[0013] The increase range of the sampling frequency of the strain sensor is determined by the difference between the fluctuation range of the strain force on the surface of the air film shed and a preset second fluctuation range.

[0014] Further, the control module is used to determine whether the transmission reliability of the membrane structure monitoring data meets the requirements according to the average transmission delay time of the monitoring data. If the average transmission delay time of the monitoring data is greater than the preset first delay time, it is determined that the transmission reliability of the membrane structure monitoring data does not meet the requirements;

[0015] When the average transmission delay time of the monitoring data is greater than the preset second delay time, the control module preliminarily determines that the environmental stability of the membrane structure monitoring does not meet the requirements, and determines whether the environmental stability of the membrane structure monitoring meets the requirements based on the vibration intensity of the air film shed.

[0016] Furthermore, the control module increases the cache duration of the monitoring data when the average transmission delay duration of the monitoring data is greater than the preset first delay duration and less than or equal to the preset second delay duration.

[0017] Furthermore, the increase range of the cache duration of the monitoring data is determined by the difference between the average transmission delay duration of the monitoring data and a preset first delay duration.

[0018] Furthermore, the control module is used to determine whether the environmental stability of membrane structure monitoring meets the requirements according to the vibration intensity of the air film shed. If the vibration intensity of the air film shed is greater than the preset vibration intensity, it is determined that the environmental stability of membrane structure monitoring does not meet the requirements, and the storage period of the monitoring data is reduced.

[0019] Furthermore, the reduction range of the storage period of the monitoring data is determined by the difference between the vibration intensity of the air film tent and a preset vibration intensity.

[0020] The present invention also provides a membrane structure safety real-time monitoring and early warning method, comprising:

[0021] Using strain sensors and vibration sensors to collect monitoring data of the air film tent, caching the monitoring data and transmitting them to a location to be processed;

[0022] Preprocessing the monitoring data to output optimized data, analyzing the safety of the air film shed structure according to the optimized data to output analysis results, and issuing an alarm when the analysis results exceed a preset threshold;

[0023] Obtain the strain force on the surface of the air film shed during several monitoring periods;

[0024] Determine the early warning stability of membrane structure monitoring based on the fluctuation amplitude of the surface strain of the air film shed;

[0025] If the warning stability does not meet the requirements, the sampling frequency of the strain sensor is adjusted, or the transmission reliability of the membrane structure monitoring data is determined based on the average transmission delay time of the monitoring data;

[0026] If the transmission reliability does not meet the requirements, the cache duration of the monitoring data is adjusted, or the storage period of the monitoring data is adjusted based on the vibration intensity of the air film shed.

[0027] Compared with the prior art, the beneficial effect of the present invention lies in that the system of the present invention determines the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air film shed by setting a data acquisition module, a communication module, a data processing module, an alarm module, a storage module and a control module. Since the sensor is subjected to the vibration and deformation of the membrane structure during long-term operation, the internal sensitive elements may suffer from mechanical fatigue, resulting in a decrease in measurement accuracy. By increasing the sampling frequency of the strain sensor, the details of the rapidly changing signal can be better captured, which is helpful for the subsequent removal of noise through the signal processing algorithm and the restoration of the real measurement signal. The cache duration of the monitoring data is determined according to the average transmission delay duration of the monitoring data. Since the membrane There is large equipment near the structure. When the motor of the equipment rotates, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be interfered with when passing through this area. By increasing the cache time of the monitoring data, enough data can be stored and processed after the interference is over, thereby ensuring the integrity of the data. The storage period of the monitoring data is determined according to the vibration intensity of the air film shed. Strong winds may exert a large force on the membrane structure, changing the shape and vibration frequency of the membrane structure, thereby interfering with the sensor's monitoring of the true state of the membrane structure. By reducing the storage period of the monitoring data, the changes in various parameters can be recorded in detail, and abnormal changes can be discovered in time, thereby issuing early warnings, thereby improving the warning stability of membrane structure monitoring.

[0028] Furthermore, the system of the present invention determines the sampling frequency of the strain sensor by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Since the sensor is subjected to the vibration and deformation of the membrane structure during long-term operation, the internal sensitive elements may suffer from mechanical fatigue, resulting in a decrease in measurement accuracy. By increasing the sampling frequency of the strain sensor, the rapidly changing signal details can be better captured, which helps to remove noise through subsequent signal processing algorithms and restore the true measurement signal, further improving the early warning stability of membrane structure monitoring.

[0029] Furthermore, the system of the present invention determines the cache time length of the monitoring data by setting a preset first delay time length and a preset second delay time length. Since there is large equipment near the membrane structure, when the motor of the equipment rotates, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be disturbed when passing through the area. By increasing the cache time length of the monitoring data, sufficient data can be stored and processed after the interference is over, thereby ensuring the integrity of the data and further improving the early warning stability of membrane structure monitoring.

[0030] Furthermore, the system of the present invention determines the storage period of the monitoring data by setting a preset vibration intensity. Since strong winds may exert a large force on the membrane structure, changing the shape and vibration frequency of the membrane structure, thereby interfering with the sensor's monitoring of the true state of the membrane structure, by reducing the storage period of the monitoring data, the changes in each parameter can be recorded in detail, abnormal changes can be discovered in time, and early warning can be issued, further improving the warning stability of membrane structure monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall structural block diagram of the real-time monitoring and early warning system for membrane structure safety according to an embodiment of the present invention;

[0032] Figure 2 This is an overall flow chart of the real-time monitoring and early warning method for membrane structure safety according to an embodiment of the present invention;

[0033] Figure 3 It is a logic flow chart of the real-time monitoring and early warning system for membrane structure safety according to an embodiment of the present invention;

[0034] Figure 4 This is a specific structural block diagram of the communication module of the real-time monitoring and early warning system for membrane structure safety according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, they are respectively the overall structural block diagram, overall flow chart, logic flow chart and specific structural block diagram of the communication module of the membrane structure safety real-time monitoring and early warning system and method according to the embodiment of the present invention. The membrane structure safety real-time monitoring and early warning system of the present invention comprises:

[0040] A data acquisition module, used for collecting monitoring data of the air film shed, including a strain sensor connected to the air film shed for detecting the strain force on the surface of the air film shed and a vibration sensor connected to the air film shed for detecting the vibration intensity of the air film shed;

[0041] A communication module, which is connected to the data acquisition module and includes a cache unit for caching the monitoring data and a data transmission unit connected to the cache unit for transmitting the monitoring data to a location to be processed;

[0042] A data processing module, connected to the communication module, for processing and analyzing the monitoring data to output analysis results, including a preprocessing unit for preprocessing the monitoring data to output optimization data and an analysis unit connected to the preprocessing unit for analyzing the safety of the air film shed structure according to the optimization data to output the analysis results;

[0043] An alarm module, connected to the data processing module, for issuing an alarm when the analysis result exceeds a preset threshold;

[0044] A storage module, which is connected to the data acquisition module and the data processing module respectively, and is used to store the monitoring data, the optimization data and the analysis result;

[0045] A control module is respectively connected to the data acquisition module, the communication module, the data processing module, the alarm module and the storage module, and is used to determine the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air film shed, or to determine the cache time of the monitoring data according to the average transmission delay time of the monitoring data, and to determine the storage period of the monitoring data according to the vibration intensity of the air film shed.

[0046] Specifically, the monitoring data include the strain on the surface of the air-film shed, the vibration intensity of the air-film shed, and the temperature inside the air-film shed.

[0047] Specifically, preprocessing includes cleaning, conversion, and integration operations.

[0048] Specifically, the optimized data include the strain on the surface of the air-film shed after cleaning the missing data, the vibration intensity of the air-film shed after format conversion, and the temperature inside the air-film shed after integration.

[0049] Specifically, the analysis results include the stress levels of various parts of the air film shed, whether the vibration frequency of the air film shed meets the requirements, and whether the temperature and humidity of the air film shed meet the requirements.

[0050] Specifically, the preset thresholds are: the strain threshold on the surface of the air film shed is 2000με, the vibration intensity threshold of the air film shed is 10mm, and the temperature threshold inside the air film shed is 26°C.

[0051] Specifically, the process of issuing an alarm when the analysis result exceeds the preset threshold is as follows: a mathematical model is established through numerical methods to calculate the mechanical response of the structure, the calculation results of the numerical analysis model are compared with the real-time monitoring data, and the actual behavior of the structure is detected for consistency with the numerical model; if there is an inconsistency, the abnormal part is displayed in the visual interface, and a real-time early warning signal and alarm information are generated, and an alarm is issued through the alarm module.

[0052] In practice, the system of the present invention determines the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air film shed by setting a data acquisition module, a communication module, a data processing module, an alarm module, a storage module and a control module. Since the sensor is subjected to the vibration and deformation of the membrane structure during long-term operation, the internal sensitive elements may suffer from mechanical fatigue, resulting in a decrease in measurement accuracy. By increasing the sampling frequency of the strain sensor, the details of the rapidly changing signal can be better captured, which is helpful for the subsequent removal of noise through the signal processing algorithm and the restoration of the real measurement signal. The cache time of the monitoring data is determined according to the average transmission delay time of the monitoring data. Since there are large Equipment, when the motor of the equipment is rotating, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be disturbed when passing through this area. By increasing the cache time of the monitoring data, enough data can be stored and processed after the interference is over, thereby ensuring the integrity of the data. The storage period of the monitoring data is determined according to the vibration intensity of the air film shed. Strong winds may exert a large force on the membrane structure, changing the shape and vibration frequency of the membrane structure, thereby interfering with the sensor's monitoring of the true state of the membrane structure. By reducing the storage period of the monitoring data, the changes in various parameters can be recorded in detail, and abnormal changes can be discovered in time, thereby issuing early warnings, thereby improving the warning stability of membrane structure monitoring.

[0053] Specifically, the data acquisition module also includes:

[0054] A temperature sensor is connected to the air film tent and is used to detect the temperature inside the air film tent;

[0055] A humidity sensor is connected to the air film tent and is used to detect the humidity inside the air film tent;

[0056] An anemometer is connected to the air film tent and is used to detect the wind speed at the air film tent.

[0057] Specifically, the control module is used to obtain the strain force on the surface of the air film shed within several monitoring cycles, and calculate the fluctuation amplitude of the strain force on the surface of the air film shed. If the fluctuation amplitude of the strain force on the surface of the air film shed is greater than a preset first fluctuation amplitude, it is determined that the early warning stability of the membrane structure monitoring does not meet the requirements;

[0058] When the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, the control module preliminarily determines that the transmission reliability of the membrane structure monitoring data does not meet the requirements, and determines whether the transmission reliability of the membrane structure monitoring data meets the requirements based on the average transmission delay time of the monitoring data.

[0059] It can be understood that the three intervals corresponding to the preset first fluctuation range and the preset second fluctuation range correspond to three situations respectively:

[0060] The first interval is when the fluctuation amplitude of the strain force on the surface of the air film shed is less than or equal to the preset first fluctuation amplitude, and the early warning stability of the corresponding membrane structure monitoring meets the requirements;

[0061] The second interval is when the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude. This corresponds to the situation where there is a large device near the membrane structure. When the motor of the device rotates, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be disturbed when passing through this area.

[0062] The third interval is when the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset second fluctuation amplitude. During the long-term operation of the corresponding sensor, due to the vibration and deformation of the membrane structure, the internal sensitive elements may experience mechanical fatigue, resulting in a decrease in measurement accuracy.

[0063] In practice, the preset first fluctuation amplitude is generally selected in the range of [43με, 47με], and the preset second fluctuation amplitude is generally selected in the range of [48με, 52με].

[0064] Preferably, the preferred embodiment of the preset first fluctuation amplitude is 45 με, and the preferred embodiment of the preset second fluctuation amplitude is 50 με.

[0065] Specifically, με is the unit of surface strain of the air film shed, which means microstrain.

[0066] Specifically, the fluctuation amplitude of the strain force on the surface of the air film shed is the difference between the maximum strain force and the minimum strain force on the surface of the air film shed within several cycles.

[0067] In implementation, the system of the present invention determines the warning stability of membrane structure monitoring by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude, thereby reducing the impact of the decrease in warning accuracy of membrane structure monitoring due to inaccurate determination of the warning stability of membrane structure monitoring, and further improving the warning stability of membrane structure monitoring.

[0068] Specifically, the control module increases the sampling frequency of the strain sensor when the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset second fluctuation amplitude;

[0069] The increase range of the sampling frequency of the strain sensor is determined by the difference between the fluctuation range of the strain force on the surface of the air film shed and a preset second fluctuation range.

[0070] Specifically, when the difference between the fluctuation amplitude of the strain force on the surface of the air-film shed and the preset second fluctuation amplitude is within 5με, the sampling frequency of the strain sensor is increased to 1.1 times of the original; when the difference between the fluctuation amplitude of the strain force on the surface of the air-film shed and the preset second fluctuation amplitude exceeds 5με, the sampling frequency of the strain sensor is increased by 0.5Hz for every 2με exceeding. For example, the difference between the fluctuation amplitude of the strain force on the surface of the air-film shed and the preset second fluctuation amplitude is 9με, the current sampling frequency of the strain sensor is 6Hz, and the increased sampling frequency of the strain sensor is 6×1.1+0.5×2=7.6Hz.

[0071] In implementation, the system of the present invention determines the sampling frequency of the strain sensor by setting a preset first fluctuation amplitude and a preset second fluctuation amplitude. Since the sensor is subjected to the vibration and deformation of the membrane structure during long-term operation, the internal sensitive elements may suffer from mechanical fatigue, resulting in a decrease in measurement accuracy. By increasing the sampling frequency of the strain sensor, the rapidly changing signal details can be better captured, which helps to remove noise through subsequent signal processing algorithms, restore the true measurement signal, and further improve the early warning stability of membrane structure monitoring.

[0072] Specifically, the control module is used to obtain the transmission delay time of the monitoring data within a number of transmission cycles, and calculate the average transmission delay time of the monitoring data. If the average transmission delay time of the monitoring data is greater than the preset first delay time, it is determined that the transmission reliability of the membrane structure monitoring data does not meet the requirements;

[0073] When the average transmission delay time of the monitoring data is greater than the preset second delay time, the control module preliminarily determines that the environmental stability of the membrane structure monitoring does not meet the requirements, and determines whether the environmental stability of the membrane structure monitoring meets the requirements based on the vibration intensity of the air film shed.

[0074] It can be understood that the three intervals corresponding to the preset first delay duration and the preset second delay duration correspond to three situations respectively:

[0075] The first interval is when the average transmission delay time of the monitoring data is less than or equal to the preset first delay time, corresponding to the situation where the transmission reliability of the membrane structure monitoring data meets the requirements;

[0076] The second interval is when the average transmission delay of the monitoring data is greater than the preset first delay time and less than or equal to the preset second delay time. This corresponds to the situation where there is a large device near the membrane structure. When the motor of the device rotates, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be disturbed when passing through the area.

[0077] The third interval is when the average transmission delay of the monitoring data is longer than the preset second delay time. The corresponding strong wind may exert a greater force on the membrane structure, change the shape and vibration frequency of the membrane structure, and thus interfere with the sensor's monitoring of the true state of the membrane structure.

[0078] In practice, the preset first delay time length is generally selected in the range of [2s, 4s], and the preset second delay time length is generally selected in the range of [5s, 7s].

[0079] Preferably, the preferred embodiment of the preset first delay time length is 3s, and the preferred embodiment of the preset second delay time length is 6s.

[0080] Specifically, the average transmission delay duration of the monitoring data is the ratio of the total transmission delay duration of the monitoring data in a number of transmission cycles to the number of transmission cycles.

[0081] In implementation, the system of the present invention determines the transmission reliability of membrane structure monitoring data by setting a preset first delay time and a preset second delay time, thereby reducing the impact of decreased early warning stability of membrane structure monitoring due to inaccurate determination of the transmission reliability of membrane structure monitoring data, and further improving the early warning stability of membrane structure monitoring.

[0082] Specifically, the control module increases the buffering time length of the monitoring data when the average transmission delay time length of the monitoring data is greater than the preset first delay time length and less than or equal to the preset second delay time length.

[0083] Specifically, the increase range of the cache duration of the monitoring data is determined by the difference between the average transmission delay duration of the monitoring data and the preset first delay duration.

[0084] Specifically, when the difference between the average transmission delay of the monitoring data and the preset first delay is within 3s, the cache period of the monitoring data is increased to 1.2 times the original; when the difference between the average transmission delay of the monitoring data and the preset first delay exceeds 3s, the cache period of the monitoring data increases by 1.5s for every 1s exceeding it. For example, the difference between the average transmission delay of the monitoring data and the preset first delay is 5s, the current cache period of the monitoring data is 5s, and the increased cache period of the monitoring data is 5×1.2+1.5×2=9s.

[0085] In implementation, the system of the present invention determines the cache time length of the monitoring data by setting a preset first delay time length and a preset second delay time length. Since there are large equipment near the membrane structure, when the motor of the equipment rotates, the internal winding current will generate an alternating magnetic field, causing the data transmission signal of the sensor to be disturbed when passing through the area. By increasing the cache time length of the monitoring data, sufficient data can be stored and processed after the interference is over, thereby ensuring the integrity of the data and further improving the early warning stability of membrane structure monitoring.

[0086] Specifically, the control module is used to obtain the vibration intensity of the air film shed, and determine whether the environmental stability of the membrane structure monitoring meets the requirements based on the vibration intensity of the air film shed. If the vibration intensity of the air film shed is greater than the preset vibration intensity, it is determined that the environmental stability of the membrane structure monitoring does not meet the requirements, and the storage period of the monitoring data is reduced.

[0087] It can be understood that the two intervals corresponding to the preset vibration intensity correspond to two situations:

[0088] The first interval is when the vibration intensity of the air film tent is less than or equal to the preset vibration intensity, and the environmental stability of the corresponding membrane structure monitoring meets the requirements;

[0089] The second interval is when the vibration intensity of the air film shed is greater than the preset vibration intensity. The corresponding strong wind may exert a greater force on the membrane structure, change the shape and vibration frequency of the membrane structure, and thus interfere with the sensor's monitoring of the true state of the membrane structure.

[0090] In practice, the preset vibration intensity is generally selected in the range of [1m / s 2 , 3m / s 2 ].

[0091] Preferably, the preset vibration intensity is 2 m / s. 2 .

[0092] During implementation, the system of the present invention determines the environmental stability of membrane structure monitoring by setting a preset vibration intensity, thereby reducing the impact of decreased early warning stability of membrane structure monitoring due to inaccurate determination of the environmental stability of membrane structure monitoring, and further improving the early warning stability of membrane structure monitoring.

[0093] Specifically, the reduction range of the storage period of the monitoring data is determined by the difference between the vibration intensity of the air film tent and the preset vibration intensity.

[0094] Specifically, the difference between the vibration intensity of the air film tent and the preset vibration intensity is 1m / s 2 When the difference between the vibration intensity of the air film shed and the preset vibration intensity exceeds 1m / s, the storage period of the monitoring data is reduced to 0.9 times of the original value.2 When it exceeds 0.5m / s 2 , the storage period of monitoring data is reduced by 1min. For example, the difference between the vibration intensity of the air film shed and the preset vibration intensity is 2m / s 2 , the current storage period of monitoring data is 10 minutes, and the reduced storage period of monitoring data is 10×0.9-1×2=7 minutes.

[0095] During implementation, the system of the present invention determines the storage period of monitoring data by setting a preset vibration intensity. Since strong winds may exert a greater force on the membrane structure, changing the shape and vibration frequency of the membrane structure, thereby interfering with the sensor's monitoring of the true state of the membrane structure, by reducing the storage period of the monitoring data, the changes in each parameter can be recorded in detail, abnormal changes can be discovered in time, and early warning can be issued, further improving the warning stability of membrane structure monitoring.

[0096] A real-time monitoring and early warning method for membrane structure safety, comprising:

[0097] Step S1, using a strain sensor and a vibration sensor to collect monitoring data of the air film tent, caching the monitoring data and transmitting it to a location to be processed;

[0098] Step S2, preprocessing the monitoring data to output optimized data, analyzing the safety of the air-film shed structure according to the optimized data to output an analysis result, and issuing an alarm when the analysis result exceeds a preset threshold;

[0099] Step S3, obtaining the strain force on the surface of the air film shed during several monitoring periods;

[0100] Step S4, determining the early warning stability of membrane structure monitoring based on the fluctuation amplitude of the strain force on the surface of the air film shed;

[0101] Step S5, if the warning stability does not meet the requirements, the sampling frequency of the strain sensor is adjusted, or the transmission reliability of the membrane structure monitoring data is determined based on the average transmission delay time of the monitoring data;

[0102] Step S6: If the transmission reliability does not meet the requirement, the cache duration of the monitoring data is adjusted, or the storage period of the monitoring data is adjusted based on the vibration intensity of the air film tent.

[0103] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A membrane structure safety real-time monitoring and early warning system, characterized in that: include: A data acquisition module, used for collecting monitoring data of the air film shed, including a strain sensor connected to the air film shed for detecting the strain force on the surface of the air film shed and a vibration sensor connected to the air film shed for detecting the vibration intensity of the air film shed; A communication module, which is connected to the data acquisition module and includes a cache unit for caching the monitoring data and a data transmission unit connected to the cache unit for transmitting the monitoring data to a location to be processed; A data processing module, connected to the communication module, for processing and analyzing the monitoring data to output analysis results, including a preprocessing unit for preprocessing the monitoring data to output optimization data and an analysis unit connected to the preprocessing unit for analyzing the safety of the air film shed structure according to the optimization data to output the analysis results; An alarm module, connected to the data processing module, for issuing an alarm when the analysis result exceeds a preset threshold; A storage module, which is connected to the data acquisition module and the data processing module respectively, and is used to store the monitoring data, the optimization data and the analysis result; A control module, which is respectively connected to the data acquisition module, the communication module, the data processing module, the alarm module and the storage module, and is used to determine the sampling frequency of the strain sensor according to the fluctuation amplitude of the strain force on the surface of the air film shed, or to determine the cache time of the monitoring data according to the average transmission delay time of the monitoring data; The storage period of monitoring data is determined according to the vibration intensity of the air film tent.

2. The membrane structure safety real-time monitoring and early warning system according to claim 1 is characterized in that: The data acquisition module also includes: A temperature sensor is connected to the air film tent and is used to detect the temperature inside the air film tent; A humidity sensor is connected to the air film tent and is used to detect the humidity inside the air film tent; An anemometer is connected to the air film tent and is used to detect the wind speed at the air film tent.

3. The membrane structure safety real-time monitoring and early warning system according to claim 2 is characterized in that: The control module is used to determine whether the early warning stability of the membrane structure monitoring meets the requirements according to the fluctuation amplitude of the strain force on the surface of the air film shed. If the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset first fluctuation amplitude, it is determined that the early warning stability of the membrane structure monitoring does not meet the requirements; When the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset first fluctuation amplitude and less than or equal to the preset second fluctuation amplitude, the control module preliminarily determines that the transmission reliability of the membrane structure monitoring data does not meet the requirements, and determines whether the transmission reliability of the membrane structure monitoring data meets the requirements based on the average transmission delay time of the monitoring data.

4. The membrane structure safety real-time monitoring and early warning system according to claim 3 is characterized in that: The control module increases the sampling frequency of the strain sensor when the fluctuation amplitude of the strain force on the surface of the air film shed is greater than the preset second fluctuation amplitude; The increase range of the sampling frequency of the strain sensor is determined by the difference between the fluctuation range of the strain force on the surface of the air film shed and a preset second fluctuation range.

5. The membrane structure safety real-time monitoring and early warning system according to claim 3 is characterized in that: The control module is used to determine whether the transmission reliability of the membrane structure monitoring data meets the requirements according to the average transmission delay time of the monitoring data. If the average transmission delay time of the monitoring data is greater than the preset first delay time, it is determined that the transmission reliability of the membrane structure monitoring data does not meet the requirements; When the average transmission delay time of the monitoring data is greater than the preset second delay time, the control module preliminarily determines that the environmental stability of the membrane structure monitoring does not meet the requirements, and determines whether the environmental stability of the membrane structure monitoring meets the requirements based on the vibration intensity of the air film shed.

6. The membrane structure safety real-time monitoring and early warning system according to claim 5 is characterized in that: The control module increases the buffering time length of the monitoring data when the average transmission delay time length of the monitoring data is greater than the preset first delay time length and less than or equal to the preset second delay time length.

7. The membrane structure safety real-time monitoring and early warning system according to claim 6 is characterized in that: The increase range of the cache duration of the monitoring data is determined by the difference between the average transmission delay duration of the monitoring data and the preset first delay duration.

8. The membrane structure safety real-time monitoring and early warning system according to claim 7 is characterized in that: The control module is used to determine whether the environmental stability of membrane structure monitoring meets the requirements according to the vibration intensity of the air film shed. If the vibration intensity of the air film shed is greater than the preset vibration intensity, it is determined that the environmental stability of membrane structure monitoring does not meet the requirements and the storage period of monitoring data is reduced.

9. The membrane structure safety real-time monitoring and early warning system according to claim 8 is characterized in that: The reduction range of the storage period of the monitoring data is determined by the difference between the vibration intensity of the air film tent and the preset vibration intensity.

10. A membrane structure safety real-time monitoring and early warning method applied to the membrane structure safety real-time monitoring and early warning system according to any one of claims 1 to 9, characterized in that: include: Using strain sensors and vibration sensors to collect monitoring data of the air film tent, caching the monitoring data and transmitting them to a location to be processed; Preprocessing the monitoring data to output optimized data, analyzing the safety of the air film shed structure according to the optimized data to output an analysis result, and issuing an alarm when the analysis result exceeds a preset threshold; Obtain the strain force on the surface of the air film shed during several monitoring periods; Determine the early warning stability of membrane structure monitoring based on the fluctuation amplitude of the surface strain of the air film shed; If the warning stability does not meet the requirements, the sampling frequency of the strain sensor is adjusted, or the transmission reliability of the membrane structure monitoring data is determined based on the average transmission delay time of the monitoring data; If the transmission reliability does not meet the requirements, the cache duration of the monitoring data is adjusted, or the storage period of the monitoring data is adjusted based on the vibration intensity of the air film shed.

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