A real-time abnormal diagnosis method and system for real-time monitoring data of old bridge strain

Abstract

The present invention relates to the technical field of bridge data monitoring, and more particularly to a method and system for diagnosing anomalies in real-time strain monitoring data of old slab bridges based on force transmission indicators. The method comprises collecting strain monitoring data of n main beam components of the old bridge superstructure at any time t, processing and converting the data into displacement monitoring data; calculating the force transmission index between the i-th and j-th main beam components of the old bridge superstructure at time t, and constructing a force transmission index threshold matrix for the old bridge superstructure having n main beam components; and constructing an anomaly judgment function for the strain monitoring data of the i-th main beam component of the old bridge superstructure at time t. When the anomaly judgment function is 0, it indicates that the displacement monitoring data of the i-th main beam component at time t is not anomaly; otherwise, it indicates that an anomaly is present. The present invention enhances the data accuracy of the real-time strain monitoring system of the old bridge, promptly eliminates misjudgments in bridge structure safety monitoring, and improves the reliability of bridge safety monitoring and safety assessment.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge data monitoring, and in particular to a method and system for diagnosing abnormalities in real-time strain monitoring data of an old slab bridge. Background Art

[0002] Over the course of their service, old bridges develop varying degrees of damage due to long-term exposure to factors such as traffic loads, environmental erosion, and material aging. These defects, including cracks, deformation, and corrosion, severely impact the bridge's structural safety and service life. To prevent further structural damage and resulting bridge accidents, regular inspections and safety monitoring are required for the safety of old bridges, as they are primarily the upper girder structure. However, since regular inspections occur every one to three years, the timeliness of monitoring the structural safety status is insufficient. To provide real-time visibility into the safety status of bridges, bridge health monitoring systems have emerged. These systems employ sensors installed on bridges to monitor structural responses, such as strain indicators that can characterize bridge safety. These systems monitor strain changes in the bridge structure in real time, allowing for the timely detection and diagnosis of structural abnormalities and providing a scientific basis for bridge maintenance and management. However, real-time strain monitoring data can contain anomalies beyond structural damage. These anomalies are primarily due to sensor failures, signal interference, and external interference, which are not directly related to the structural degradation of the old bridge. These anomalies can lead to misjudgments of bridge safety and compromise the accuracy and reliability of real-time strain monitoring systems.

[0003] To address the issue of data anomalies in strain monitoring systems, most technologies use machine learning to train monitoring data and establish predictive models to identify anomalies. However, due to the uncertainty in model parameter selection and the randomness of monitoring data anomalies, the established predictive models contain errors in identifying data anomalies. Furthermore, machine learning approaches require high computational costs and require the establishment of models for each strain measurement point, which has certain limitations in practical engineering applications. To address these issues, a method and system for real-time anomaly diagnosis of old bridge strain monitoring data is proposed based on a mechanically driven analysis of the structural characteristics of the old bridge. Summary of the Invention

[0004] In response to the problems in the prior art, the present invention provides a method and system for real-time diagnosis of abnormalities in real-time strain monitoring data of old bridges. The specific technical solutions are as follows:

[0005] A method for real-time diagnosis of abnormalities in real-time monitoring data of old bridge strain includes the following steps:

[0006] Step S1: collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t, and set the The strain monitoring data of the main beam component at time t is , i=1,2,...,n;

[0007] Step S2: strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data ;

[0008] Step S3, based on the displacement monitoring data of n main beam components processed at any time t Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t ;

[0009] Step S4: construct the threshold matrix of force transmission index of the old bridge superstructure with n main beam components ;

[0010] Step S5, construct the upper structure of the old bridge Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t is 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times.

[0011] Preferably, in step S2, the processed strain monitoring data Converted into displacement monitoring data The details are as follows:

[0012] ;

[0013] ;

[0014] in, Indicates the calculated span of the main beam, Indicates the distance between the neutral axis of the upper structure main beam and the lower edge of the section. For the main beam structure with the same upper structure section type, is a fixed value.

[0015] Preferably, in step S3, the old bridge superstructure at time t is and Force transmission index between main beam components is calculated as follows:

[0016] ;

[0017] The force transmission index matrix of n main beam components at any time t Expressed as:

[0018] .

[0019] Preferably, the step S4 constructs a force transmission index threshold matrix of the old bridge superstructure with n main beam components The specific steps include:

[0020] Step S41, using orthogonal test design damage conditions, for the transverse direction of the bridge The orthogonal test factors include the damage of the superstructure stiffness Degree of damage to the force transmission device , a total of There are three factors with different levels, including 0%, 50% and 100%;

[0021] Step S42, according to the orthogonal test design of the old bridge upper damage condition, calculate the first and Force transmission index between main beam components , and then get the force transmission index The range of ;in, , , Indicates the first damage condition under all damage conditions of orthogonal test design. and The minimum value of the force transmission index between the main beam components, Indicates the first damage condition under all damage conditions of orthogonal test design. and The maximum value of the force transmission index between the main beam components;

[0022] Step S43: according to the force transmission index between different components The range of Constructing the force transmission index threshold matrix of the old slab bridge superstructure with n main beam components , as follows:

[0023] .

[0024] Preferably, in step S42, the force transmission index under different damage conditions of the upper part of the old bridge is is calculated as follows:

[0025] Step S421, calculate the unit uniform load Displacement of the main beam structure after damage under the action ;

[0026] Step S422: Based on the displacement of the main beam structure after damage , calculate the unit uniform load Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement ;

[0027] Step S423, according to Main beam structure displacement Hedi Main beam structure displacement Calculate the and Force transmission index between main beam components , as follows:

[0028] .

[0029] Preferably, the unit uniform load in step S421 Displacement of the main beam structure after damage under the action is calculated as follows:

[0030]

[0031] in, Indicates the calculated span of the main beam, Indicates damage to the upper structure stiffness.

[0032] Preferably, the unit uniform load in step S422 Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement is calculated as follows:

[0033] Step S4221, calculate the shear force at the force transmission device between each main beam component , for the transverse bridge The old slab bridge structure with main beam components, when the unit uniformly distributed load The effect is When there are three main beam components, the shear force of the force transmission device between the main beam components The calculation is as follows:

[0034] ;

[0035] in,

[0036] ;

[0037] ;

[0038] ;

[0039] Where, Indicates unit uniform load For the first Relative displacement caused by a force transmission device; Indicates the The shear force at the first force transmission device Relative vertical displacement caused by a force transmission device; Indicates the The degree of damage to each force transmission device, ; Indicates the displacement of the main beam structure after damage; It indicates the central rotation angle of the main beam component caused by the shear force at the force transmission device; Indicates the Shear force at each force transmission device;

[0040] Step S4222: Based on the shear force of the force transmission device between the main beam components , calculate the unit uniform load Displacement of the main beam structure under the action , the formula is as follows:

[0041] ;

[0042] ;

[0043] ;

[0044] ;

[0045] .

[0046] Preferably, the first part of the old bridge superstructure is constructed Abnormal judgment function of the strain monitoring data of the main beam component at time t The details are as follows:

[0047] ;

[0048] ;

[0049] in, Indicates the first i OK, j Elements of a column.

[0050] A real-time abnormality diagnosis system for real-time strain monitoring data of an old bridge, using the method described above, comprises:

[0051] The data acquisition module is used to collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t. The strain monitoring data of the main beam component at time t is , i=1,2,...,n;

[0052] Data processing module for strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data ;

[0053] The force transmission index calculation module is used to monitor the displacement data of n main beam components at any time t. Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t ;

[0054] Threshold matrix construction module, used to construct the threshold matrix of force transmission index of the superstructure of old slab bridge with n main beam components ;

[0055] Abnormal judgment module, used to build the first Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times.

[0056] An electronic device includes a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the real-time abnormality diagnosis method of the real-time monitoring data of the strain of an old plate bridge based on the force transmission index.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] 1. The present invention establishes force transmission indicators and force transmission indicator matrices based on real-time strain monitoring data, which realizes the joint characterization of the strain monitoring relationship of each main beam component and facilitates the joint judgment of data anomalies of single strain measurement points and multiple strain measurement points.

[0059] 2. Based on the force transmission index matrix and the force transmission index threshold matrix, the present invention establishes an abnormality judgment function for the real-time strain monitoring data of each main beam component of the superstructure of the old slab bridge, which can realize the rapid judgment of abnormalities in real-time strain monitoring data, quickly locate sensors with abnormal monitoring data, promptly discover problems in the monitoring system, and reduce the cost of operation and maintenance of the monitoring system.

[0060] 3. The present invention enhances the data accuracy of the real-time strain monitoring system of the old slab bridge, timely eliminates the misjudgment of bridge structure safety monitoring, and improves the reliability of bridge safety monitoring and safety assessment. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0062] Figure 1 Flow chart of the method of the present invention.

[0063] Figure 2 This is a system principle diagram of the present invention. DETAILED DESCRIPTION

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0065] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0066] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0067] It should be further understood that the term "and / or" used in the present description and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0068] Example 1:

[0069] like Figure 1 As shown, this embodiment provides a method for real-time diagnosis of abnormalities in real-time monitoring data of old Banqiao strain, including the following steps:

[0070] Step S1: collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t, and set the The strain monitoring data of the main beam component at time t is , i=1,2,...,n.

[0071] Step S2: strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data Specifically, the strain monitoring data Improved filtering algorithm is used for filtering to obtain processed strain monitoring data. The improved filtering algorithm is as follows: first, the strain monitoring data The 3 times standard deviation method is used to determine whether the data is abnormal. If the data is abnormal, the strain monitoring data is eliminated, and the strain monitoring data is supplemented by the linear interpolation method, and then mean filtering is performed.

[0072] The processed strain monitoring data Converted into displacement monitoring data The details are as follows:

[0073] ;

[0074] ;

[0075] in, Indicates the calculated span of the main beam, Indicates the distance between the neutral axis of the upper structure main beam and the lower edge of the section. For the main beam structure with the same upper structure section type, is a fixed value.

[0076] For the superstructure main beam of the old bridge, under the action of vehicle external load, the displacement of the superstructure main beam at the mid-span position and strain The calculation formula is as follows:

[0077] ;

[0078] ;

[0079] Where, It represents the bending moment value of the mid-span section of the upper main beam structure of the old slab bridge under the external load of vehicles;

[0080] For the main beam of the superstructure of the old slab bridge with the same cross-section and the same load effect, the relationship between the force transmission index based on displacement and the force transmission index based on strain is as follows:

[0081] ;

[0082] ;

[0083] In the formula, for the main beam structure with the same superstructure cross-section type is a constant, and the relationship between the force transmission index based on displacement is consistent with the force transmission index based on strain. Therefore, the present invention converts the processed strain monitoring data into displacement monitoring data, which can help to judge the abnormality of strain data.

[0084] Step S3, based on the strain monitoring data of n main beam components processed at any time t Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t The upper structure of the old Banqiao Bridge at time t and Force transmission index between main beam components is calculated as follows:

[0085] ;

[0086] The force transmission index matrix of n main beam components at any time t Expressed as:

[0087] .

[0088] Step S4: construct the threshold matrix of force transmission index of the old bridge superstructure with n main beam components The specific steps include:

[0089] Step S41, using orthogonal test design damage conditions, for the transverse direction of the bridge The orthogonal test factors include the damage of the superstructure stiffness Degree of damage to the force transmission device , a total of There are three factors with different levels, including 0%, 50% and 100%.

[0090] Step S42, according to the orthogonal test design of the old bridge upper damage condition, calculate the first and Force transmission index between main beam components , and then get the force transmission index The range of ;in, , , Indicates the first damage condition under all damage conditions of orthogonal test design. and The minimum value of the force transmission index between the main beam components, Indicates the first damage condition under all damage conditions of orthogonal test design. and The maximum value of the force transmission index between the main beam components.

[0091] Among them, the force transmission index under different damage conditions of the upper part of the old slab bridge is is calculated as follows:

[0092] Step S421, calculate the unit uniform load Displacement of the main beam structure after damage under the action ; The calculation method is as follows:

[0093]

[0094] in, Indicates the calculated span of the main beam, Indicates damage to the upper structure stiffness.

[0095] Step S422: Based on the displacement of the main beam structure after damage , calculate the unit uniform load Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement Unit uniform load Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement is calculated as follows:

[0096] Step S4221, calculate the shear force at the force transmission device between each main beam component , for the transverse bridge The old slab bridge structure with main beam components, when the unit uniformly distributed load The effect is When there are three main beam components, the shear force of the force transmission device between the main beam components The calculation is as follows:

[0097] ;

[0098] in,

[0099] ;

[0100] ;

[0101] ;

[0102] Where, Indicates unit uniform load For the first Relative displacement caused by a force transmission device; Indicates the The shear force at the first force transmission device Relative vertical displacement caused by a force transmission device; Indicates the The degree of damage to each force transmission device, ; Indicates the displacement of the main beam structure after damage; It indicates the central rotation angle of the main beam component caused by the shear force at the force transmission device; Indicates the Shear force at each force transmission device.

[0103] Step S4222: Based on the shear force of the force transmission device between the main beam components , calculate the unit uniform load Displacement of the main beam structure under the action , the formula is as follows:

[0104] ;

[0105] ;

[0106] ;

[0107] ;

[0108] .

[0109] Step S423, according to Main beam structure displacement Hedi Main beam structure displacement Calculate the and Force transmission index between main beam components , as follows:

[0110] .

[0111] Step S43: according to the force transmission index between different components The range of Constructing the force transmission index threshold matrix of the old slab bridge superstructure with n main beam components , as follows:

[0112] .

[0113] Step S5, construct the upper structure of the old bridge Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t is 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times.

[0114] The first section of the old bridge superstructure was constructed Abnormal judgment function of the strain monitoring data of the main beam component at time t The details are as follows:

[0115] ;

[0116] ;

[0117] in, Indicates the first i OK, j Elements of a column.

[0118] Example 2:

[0119] like Figure 2 As shown, based on the same inventive concept as Example 1, this embodiment provides a real-time abnormality diagnosis system for real-time strain monitoring data of old plate bridges, and the method described above includes:

[0120] The data acquisition module is used to collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t. The strain monitoring data of the main beam component at time t is , i=1,2,...,n;

[0121] Data processing module for strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data ;

[0122] The force transmission index calculation module is used to monitor the strain data of n main beam components at any time t. Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t ;

[0123] Threshold matrix construction module, used to construct the threshold matrix of force transmission index of the superstructure of old slab bridge with n main beam components ;

[0124] Abnormal judgment module, used to build the first Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t is 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times.

[0125] The abnormal real-time diagnosis system of this embodiment can be used to monitor the strain change of the main beam of the upper structure under the external loads such as vehicles and the environment in real time, and judge the safety status of the old bridge during its service life. It specifically includes a hardware system and a software system. The hardware system includes a data acquisition module, and the software system includes a data processing module, a force transmission index calculation module, a threshold matrix construction module, and an abnormality judgment module. Among them, the data acquisition module includes a fiber Bragg grating strain gauge with a strain measurement range of ±1500 , the measurement accuracy is 0.2%FS, and the operating temperature range is -30℃~+85℃.

[0126] Example 3:

[0127] Based on the same inventive concept as Example 1, this embodiment provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the real-time abnormality diagnosis method of the real-time monitoring data of the old plate bridge strain based on the force transmission index.

[0128] Those skilled in the art will appreciate that the modules of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition of each example has been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0129] In the embodiments provided by the present invention, it should be understood that the division of modules is merely a logical function division, and there may be other division methods in actual implementation, for example, multiple modules can be combined into one module, one module can be split into multiple modules, or some features can be ignored, etc.

[0130] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0131] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), a mobile hard drive, a magnetic disk, or an optical disk.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A real-time abnormal diagnosis method for real-time monitoring data of old bridge strain, characterized by: The following steps are involved: Step S1: collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t, and set the The strain monitoring data of the main beam component at time t is , i=1,2,...,n; Step S2: strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data ; The processed strain monitoring data Converted into displacement monitoring data The details are as follows: ； ； in, Indicates the calculated span of the main beam, Indicates the distance between the neutral axis of the upper structure main beam and the lower edge of the section. For the main beam structure with the same upper structure section type, is a fixed value; Step S3, based on the displacement monitoring data of n main beam components processed at any time t Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t ; Old Banqiao superstructure at time t and Force transmission index between main beam components is calculated as follows: ； The force transmission index matrix of n main beam components at any time t Expressed as: ； Step S4: construct the threshold matrix of force transmission index of the old bridge superstructure with n main beam components ; Step S5, construct the upper structure of the old bridge Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t is 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times; The first section of the old bridge superstructure was constructed Abnormal judgment function of the strain monitoring data of the main beam component at time t The details are as follows: ； ； in, Indicates the first i OK, j Elements of the column; Indicates the first damage condition under all damage conditions of orthogonal test design. and The minimum value of the force transmission index between the main beam components, Indicates the first damage condition under all damage conditions of orthogonal test design. and The maximum value of the force transmission index between the main beam components.

2. The method for real-time diagnosis of abnormalities in real-time monitoring data of old bridge strain according to claim 1 is characterized in that: The step S4 constructs a force transmission index threshold matrix of the old slab bridge superstructure with n main beam components The specific steps include: Step S41, using orthogonal test design damage conditions, for the transverse direction of the bridge The orthogonal test factors include the damage of the superstructure stiffness Degree of damage to the force transmission device , a total of There are three factors with different levels, including 0%, 50% and 100%; Step S42, according to the orthogonal test design of the old bridge upper damage condition, calculate the first and Force transmission index between main beam components , and then get the force transmission index The range of ;in, , ; Step S43: according to the force transmission index between different components The range of Constructing the force transmission index threshold matrix of the old slab bridge superstructure with n main beam components , as follows: 。 3. The method for real-time diagnosis of abnormalities in real-time monitoring data of old bridge strain according to claim 2 is characterized in that: The force transmission index under different damage conditions of the upper part of the old bridge in step S42 is calculated as follows: Step S421, calculate the unit uniform load Displacement of the main beam structure after damage under the action ; Step S422: Based on the displacement of the main beam structure after damage , calculate the unit uniform load Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement ; Step S423, according to Main beam structure displacement Hedi Main beam structure displacement Calculate the and Force transmission index between main beam components , as follows: 。 4. The method for real-time diagnosis of abnormalities in real-time monitoring data of old bridge strain according to claim 3 is characterized in that: Unit uniform load in step S421 Displacement of the main beam structure after damage under the action is calculated as follows: in, Indicates the calculated span of the main beam, Indicates damage to the upper structure stiffness.

5. The method for real-time diagnosis of abnormalities in real-time monitoring data of old bridge strain according to claim 3 is characterized in that: Unit uniform load in step S422 Considering the damage of main beam structure and force transmission device under the action of Main beam structure displacement is calculated as follows: Step S4221, calculate the shear force at the force transmission device between each main beam component , for the transverse bridge The old slab bridge structure with main beam components, when the unit uniformly distributed load The effect is When there are three main beam components, the shear force of the force transmission device between the main beam components The calculation is as follows: ； in, ； ； ； Where, Indicates unit uniform load For the first Relative displacement caused by a force transmission device; Indicates the The shear force at the first force transmission device Relative vertical displacement caused by a force transmission device; Indicates the The degree of damage to each force transmission device, ; Indicates the displacement of the main beam structure after damage; It indicates the central rotation angle of the main beam component caused by the shear force at the force transmission device; Indicates the Shear force at each force transmission device; Step S4222: Based on the shear force of the force transmission device between the main beam components , calculate the unit uniform load Displacement of the main beam structure under the action , the formula is as follows: ； ； ； ； 。 6. A real-time abnormal diagnosis system for real-time monitoring data of old Banqiao strain, characterized by: The method according to any one of claims 1 to 5 comprises: The data acquisition module is used to collect the strain monitoring data of n main beam components of the old bridge superstructure at any time t. The strain monitoring data of the main beam component at time t is , i=1,2,...,n; Data processing module for strain monitoring data Processing is performed to obtain processed strain monitoring data , and the processed strain monitoring data Converted into displacement monitoring data ; The force transmission index calculation module is used to monitor the displacement data of n main beam components at any time t. Calculate the superstructure of the old bridge at time t and Force transmission index between main beam components , we can get the force transmission index matrix of n main beam components at any time t ; Threshold matrix construction module, used to construct the threshold matrix of force transmission index of the superstructure of old slab bridge with n main beam components ; Abnormal judgment module, used to build the first Abnormal judgment function of the strain monitoring data of the main beam component at time t , when the Abnormal judgment function of the strain monitoring data of the main beam component at time t is 0, indicating the The main beam components There is no abnormality in the strain monitoring data at the moment. Abnormal judgment function of the strain monitoring data of the main beam component at time t is 1, indicating the The main beam components There are anomalies in the strain monitoring data at all times.

7. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the method for real-time diagnosis of abnormalities in real-time monitoring data of old plate bridge strain according to any one of claims 1 to 5.

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