CN116415777A - Urban bridge crowd health monitoring system - Google Patents
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Abstract
The invention belongs to the technical field of bridge monitoring, and particularly relates to an urban bridge group health monitoring system. The system comprises an automatic sensing and testing subsystem, a data management and control subsystem, a comprehensive early warning and safety evaluation subsystem, a user interface subsystem and a manual auxiliary management and maintenance subsystem; the invention relates to a health monitoring system for urban bridge groups, which adopts an informatization means to carry out intelligent management on the urban bridge groups, solves the problem of health monitoring of urban bridge groups on one hand, gathers the monitoring data of each bridge into one system, is convenient for data analysis and viewing, and has stronger relevance of the data. On the other hand, the traditional bridge safety monitoring and bridge maintenance management are combined, and various means are adopted to monitor the bridge.
Description
Technical Field
The invention belongs to the technical field of bridge monitoring, and particularly relates to an urban bridge group health monitoring system.
Background
Throughout the development history of human society, bridges are an important ring in a transportation system, and play an important role in promoting economic development and social progress. However, with the rapid increase of traffic volume caused by economic flight, the overload problem is frequent, a lot of bridges are not heavy in operation, and the bridge safety problem is not optimistic. A large number of bridge damage accidents prove that frequent overweight vehicles bring continuous, random and overrun load pressure to the bridge, the accumulation of damage and the attenuation of resistance of the bridge structure are easy to accelerate, and the structure is finally unstable. Therefore, accurately and efficiently monitoring the bridge deck mobile vehicle-mounted information becomes a key for ensuring the safety of a transportation system and the stability of the society and the folks.
The traditional bridge health monitoring system mainly aims at realizing real-time monitoring of single large-span bridges, but urban bridges are managed and maintained by adopting a method of regular inspection and manual inspection, so that the safety state and potential risk of the bridges cannot be mastered and evaluated in time, the overall management efficiency is low, and the means are single.
Disclosure of Invention
The invention provides a health monitoring system for urban bridge groups, which aims to overcome the defects of the prior art.
In order to achieve the aim of the invention, the technical scheme adopted by the invention is as follows:
a health monitoring system for urban bridge group comprises an automatic sensing and testing subsystem, a data management and control subsystem, a comprehensive early warning and safety evaluation subsystem, a user interface subsystem and a manual auxiliary management and maintenance subsystem;
the automatic sensing and testing subsystem monitors the changes of structural stress and temperature, structural deformation and displacement and structural acceleration parameters during the operation of the structure according to a certain signal acquisition strategy and with reasonable distribution and sensor selection schemes, so as to obtain original signals of voltage, current, frequency and optical signals; after being processed, the data are converted into digital signals and transmitted to a data management and control subsystem; the data management and control subsystem completes verification of the monitoring data, and stores, manages and visualizes all the original data, the monitoring data, the health evaluation data and the like in a structured manner; the data transfer station is used for completing signal transmission with each subsystem; the subsystem stores and manages all data classifications generated by each system in a long term and unified way in the running process of the total system in a database mode; the structure early warning and evaluating system performs statistical analysis by calling real-time monitoring data of the data management and control subsystem, so that the state change of the structure is quickly known and mastered, and the early warning is timely triggered when the bridge structure state is abnormal or has abnormal symptoms; after structural early warning, comprehensively utilizing data acquired automatically by a monitoring system and information acquired by periodic manual detection, evaluating the health condition of the bridge by combining finite element model simulation analysis and damage recognition technology, giving corresponding decision suggestions such as bridge maintenance, repair requirements and the like, and forming a health state evaluation report; the user interface subsystem is used for realizing the function of displaying various data to a user in real time according to the requirement, providing a friendly man-machine interaction interface, receiving control and input of the system by the user, three-dimensional inquiry and online analysis of monitoring data and the like, and periodically pushing data analysis reports of the structure; the user interface subsystem aims to realize centralized operation management and control and information display of the multiple bridge health monitoring systems by adopting an informatization technology, provides rich graphic information for remote monitoring of bridge structures, provides monitoring data analysis results for related personnel such as management units, scientific research units, design units, maintenance units, structural engineers and the like, and meets the man-machine interface of monitoring management application of bridge management personnel; the manual auxiliary management and maintenance subsystem brings in the manual inspection module into a system architecture, so that automatic monitoring and manual inspection of the system are combined, potential safety hazard problems are automatically proposed through an early warning system, management and maintenance tasks are distributed to management and maintenance units, and relevant personnel upload detection results to the management and maintenance units after in-situ investigation, so that a management closed loop is formed.
Further as a preferred technical scheme of the invention, the data management and control subsystem comprises a sensor module, an automatic data acquisition and transmission module and a data processing and control module; the sensor module designs a sensing system aiming at each bridge structure according to actual cost and structure limit, and realizes a monitoring target by using a limited sensor; the automatic data acquisition and transmission module is used for acquiring and transmitting signals generated by the sensor and comprises a field data acquisition layer, a data remote summarization layer and a data terminal access layer; the field data acquisition layer consists of various sensors and acquisition instruments, is connected with the field data acquisition layer through a field bus RS485 and an Ethernet, and acquires output signals of the sensors through the acquisition instruments and performs signal preprocessing and pre-storage; the data remote summarizing layer comprises a communication server and a switch, and transmits and gathers the signals acquired by the field acquisition layer to a field remote transmission network access part; the data terminal access layer comprises an optical fiber private line or a high-speed mobile network, and transmits the data of the data remote summary layer to a remote cluster data management platform; after the data are remotely summarized to the data processing and analyzing server, the data processing and controlling module performs the collection, processing, analysis, display, archiving and storage of all signals and sends the processed and analyzed data to the structural safety assessment system server for structural safety condition assessment and monitoring and assessment report generation.
Further as a preferable technical scheme of the invention, the structure early warning and evaluating system comprises a structure safety early warning module and a structure state evaluating module; the structure safety early warning module comprises an online early warning module and an offline early warning module; the structure state evaluation module comprises an online evaluation module and an offline evaluation module; the online early warning module and the online evaluation module automatically generate an evaluation report according to the daily monitoring data; and the offline early warning module and the offline evaluation module finish the evaluation report on line according to the periodic monitoring data.
Further, as a preferred technical scheme of the invention, the manual auxiliary management and maintenance subsystem is also compatible with the input of periodic manual inspection records, wherein the inspection records comprise conventional inspection and periodic inspection, the conventional inspection comprises the appearance inspection of main structural members, auxiliary facilities and the like of the bridge, and the periodic inspection comprises the complete linear observation of the full bridge and the disease observation of key positions.
Compared with the prior art, the urban bridge group health monitoring system provided by the invention has the following technical effects:
the invention relates to a health monitoring system for urban bridge groups, which adopts an informatization means to carry out intelligent management on the urban bridge groups, solves the problem of health monitoring of urban bridge groups on one hand, gathers the monitoring data of each bridge into one system, is convenient for data analysis and viewing, and has stronger relevance of the data. On the other hand, the traditional bridge safety monitoring and bridge maintenance management are combined, and various means are adopted to monitor the bridge.
Drawings
FIG. 1 is a schematic diagram of an urban bridge group health monitoring system according to the present invention;
FIG. 2 is a schematic diagram of an automated data acquisition and transmission module according to the present invention;
FIG. 3 is a schematic diagram of a data processing and control module according to the present invention;
FIG. 4 is a schematic diagram of a data management and control subsystem of the present invention;
FIG. 5 is a flow chart of the structure early warning and evaluation system of the present invention;
FIG. 6 is a flow chart of the static index warning according to the present invention;
FIG. 7 is a flow chart of the power indicator warning of the present invention;
FIG. 8 is a block diagram of an analytic hierarchy process indicator of the present invention;
FIG. 9 is a basic flow diagram of the bridge variant comprehensive analytic hierarchy process of the present invention;
FIG. 10 is a schematic of the software hierarchy of the present invention.
Detailed Description
The invention is further explained in the following detailed description with reference to the drawings so that those skilled in the art can more fully understand the invention and can practice it, but the invention is explained below by way of example only and not by way of limitation.
The invention provides an urban bridge group health monitoring system shown in fig. 1, which is an automatic monitoring system for comprehensively utilizing sensors, network communication, information processing and bridge engineering monitoring technologies, forming a set of software and hardware organic combination, being suitable for the structural characteristics of urban bridges and meeting the monitoring requirements of the urban bridge group. The urban bridge group health monitoring platform requires that each bridge monitoring information is integrated in one platform and shares one user interface for monitoring and managing. The platform is developed based on the same software tool, has absolute compatibility to all subsystems and has complete matching to hardware. Considering the long-term planning of the monitoring of the whole bridge group, the platform can be used for the health monitoring of all primary and secondary bridges in cities and has the convenience of regular capacity expansion. Each bridge monitoring system takes a structural health monitoring system design standard (CECS-333-2012) and a highway bridge structural monitoring technical specification (JT/T1037-2022) as basic design standards to carry out deepening promotion, and comprises an automatic sensing test subsystem, a data management and control subsystem, a comprehensive early warning and safety evaluation subsystem, a user interface subsystem and a manual auxiliary management subsystem, wherein the functions of each subsystem architecture (figure 1) and modules are described as follows:
automated sensing test subsystem:
the subsystem is selected according to a certain signal acquisition strategy by a reasonable point distribution scheme and a sensor, and senses the changes of parameters such as structural stress and temperature, structural deformation and displacement, structural acceleration and the like during the operation of the structure to obtain original signals such as voltage, current, frequency, optical signals and the like; the processed digital signals are converted into digital signals and transmitted to a data management and control subsystem. The subsystem is divided into three modules, namely: the system comprises a sensor module, an automatic data acquisition and transmission module and a data processing and control module.
A sensor module: according to practical cost and structural limitation, a sensing system is designed for each bridge structure, and a limited sensor is reasonably utilized to realize a monitoring target. The location of the monitoring points should be selected to be representative to facilitate analysis and calculation. The primary points should be laid out to reflect the maximum stress strain and maximum deflection or displacement of the structure. And a certain number of check measuring points are arranged to ensure that the observation result is absolutely reliable, and on the other hand, redundant observation data can be provided for analysis. In addition, the measuring points can realize long-term, real-time and synchronous acquisition and ensure 24-hour continuous operation. Each sensor needs to have the functions of fault self-diagnosis, automatic fault positioning and alarming. The device can automatically collect according to a preset program and can collect at fixed points under the intervention of a user.
Automated data acquisition and transmission module: the data acquisition and transmission module is used for acquiring and transmitting signals generated by the sensor and consists of a field data acquisition layer, a data remote summary layer and a data terminal access layer, as shown in fig. 2. The field data acquisition layer consists of various sensors and acquisition instruments and is connected with the field data acquisition layer through a field bus RS485 and an Ethernet, and the field data acquisition layer is used for acquiring output signals of the sensors through the acquisition instruments and preprocessing and pre-storing the signals. Because the sensors are scattered at various positions of the bridge, and the acquisition instrument is concentrated at the data substation, signals output by the sensors need to be transmitted to the acquisition instrument through a long-distance field, and the transmission between the sensors is mainly realized through field transmission wires and cables. When the wireless data acquisition function is needed, the wireless data acquisition system can be realized by adopting an infinite transmission module based on an LPWAN (Low-Power Wide-Areantwork), namely a Low-power consumption wide area network wireless transmission technology. The data remote summarizing layer consists of a communication server and a switch and is used for converging the signal transmission acquired by the data field acquisition layer to a field remote transmission network access position. Real-time transmission of monitoring data from the bridge site to the remote cluster data management platform can be realized through an optical fiber data special line or a high-speed mobile network. The data terminal access layer consists of an optical fiber special line or a high-speed mobile network and is used for transmitting the data of the data remote summary layer to a remote cluster data management platform.
And the data processing and control module is used for: after the data is remotely summarized to the data processing and analyzing server, the data processing and controlling module performs all the tasks of collecting, processing, analyzing, displaying, archiving and storing signals, and the processed and analyzed data is sent to the structural safety assessment system server for structural safety condition assessment and monitoring/assessment report generation. Specifically, the data processing in the module is to perform deep mining on the signals after the signals are obtained, and convert the scattered bridge response signals into specific indexes so as to extract factors influencing the bridge state. The frame of the process is as in fig. 3. The data preprocessing is mainly data error processing, and error difference can be divided into three types according to error properties generated in the measuring process by an error theory: systematic errors, random errors (occasional errors), gross errors (gross errors). The processing is performed according to the flow of eliminating coarse errors, processing random errors and detecting systematic errors. The data post-processing is performed on a structural health evaluation server, and mainly advanced analysis of monitoring data such as real-time modal analysis, correlation analysis between bridge characteristic quantity and environmental factors, nonlinear regression analysis and the like are performed. Because a part of methods often occupy a certain calculation time, the analysis work is performed in an offline mode, and some conventional analysis with less time for occupying resources can also be directly realized through a WEB release interface, wherein the analysis data is from a dynamic database and a backed up original database.
And the data storage and control subsystem:
the system mainly completes verification of monitoring data, and stores, manages and visualizes all original data, monitoring data and health assessment data in a structured manner; and the data transfer station is used for completing signal transmission with each subsystem. The system has the following functions: 1) The functions of data acquisition, control, screening, management, secondary treatment and the like can be realized; 2) Providing tools and places for storing various data, establishing a distributed data storage structure matched with the data types and data scales of various monitoring data and adapting to the requirements of acquisition, preprocessing and post-processing functions of the data, and constructing a system database according to the corresponding data exchange modes; 3) The special event data is supported to be stored, analyzed and processed independently; 4) Providing a tool for data security and user management; 5) Providing a data distributed quick query tool; 6) Providing a tool for guaranteeing data consistency and synchronism; 7) Providing policies and tools for data backup and recovery; 8) Providing a tool for interfacing with a heterogeneous database; 9) Providing a service for data analysis and processing; 10 The system has a corresponding software and hardware safety mechanism and a self-diagnosis function, can alarm to bridge management personnel when data cannot be transmitted, and can take measures in time for processing; 11 If the system network communication fails, the data can be temporarily stored in the computer of the acquisition station, and the data can be transmitted to the database server after the network is normal. The system architecture is shown in fig. 4.
The subsystem stores and manages all data classifications generated by each system in a long term in the running process of the total system in a database mode, so that the redundancy of data in other systems can be greatly reduced, the running efficiency of the system is improved, and important historical basic data can be provided for further improvement of the system. In addition, to prevent human damage and attacks on the database, the database has antivirus and external firewall functions, and user authentication management will be enabled, setting access rights.
Structural early warning and evaluation system:
the structure early warning and evaluating system performs statistical analysis by calling real-time monitoring data of the data storage and control subsystem, so that the state change of the structure is quickly known and mastered, and the early warning is timely triggered when the bridge structure state is abnormal or has abnormal symptoms; after structural early warning, the health condition of the bridge is estimated by comprehensively utilizing the data automatically collected by the monitoring system and the information obtained by periodic manual detection and combining finite element model simulation analysis and damage recognition technology, corresponding decision suggestions such as bridge maintenance, repair requirements and the like are given, and a health state estimation report is formed. The method is characterized by comprising the following functions: 1) Judging and grading early warning can be carried out on the real-time monitoring structure state parameter signals by setting a definite threshold value, and the alarm condition is recorded; 2) The automatic monitoring data and the manual detection result can be subjected to statistics, comparison analysis, trend analysis and correlation analysis; 3) The method can integrate various monitoring data, detection information and analysis results, and carry out overall evaluation on structural safety and use states.
The subsystem comprises a structural safety early warning module and a structural state evaluation module. The structural safety early warning module is divided into an online early warning module and an offline early warning module. The structural state evaluation module is further divided into online evaluation and offline evaluation. The online early warning and evaluating module can automatically generate an evaluation report according to daily monitoring data, the offline early warning and evaluating module can finish the evaluation report according to the periodic monitoring data, such as evaluation of a season report, a year report and the like, perform qualitative or quantitative evaluation on the structural operation state of the bridge, give out operation conditions or maintenance suggestions of the bridge, and provide guidance and basis for bridge maintenance, repair and management.
Specifically, the main function of the structural safety evaluation module is to pre-warn external loads (wind speed and direction, earthquake ship collision, temperature and humidity and the like) which possibly threaten the safety of the bridge and response indexes (such as cable force, girder linearity, tower deflection, girder relative displacement, section stress and the like) of the structure importance in the bridge operation process. Triggering an early warning signal when special events (earthquake, ship collision, high temperature and the like) and the bridge operation state are abnormal, reminding bridge maintenance management personnel of paying attention to the bridge operation state in time, and starting an evaluation module to determine whether the bridge structure is in a safe state.
The on-line early warning module is used for dividing the structural state into three layers according to different structural damage conditions: (1) green no abnormal state is seen: the structure is shown to be good in any early warning index, structural damage or possibility symptoms affecting the safety of the structure are not generated, and the structure is in a normal state; (2) yellow early warning state: the real measurement result of the early warning index exceeds the statistical value of the existing health monitoring data, and yellow early warning is possible to occur if the sensor is abnormal, the load is obviously changed, or the bridge is slightly damaged, but all parts of the bridge structure are basically still in a normal and safe state; (3) red early warning state: the method shows that the bridge member is likely to be damaged to a certain extent, and at the moment, the structural evaluation is triggered, the damage condition of the level of the bridge member is deeply and comprehensively evaluated and confirmed, and corresponding decision suggestions are made.
In the three layers, the yellow early warning and the red early warning are divided into two layers of threshold values. The threshold value can be a theoretical calculation value, a monitoring statistical value or a standard limit value, and the threshold value of each early warning index can be valued according to the following three aspects: (1) theoretical calculation of the worst condition response value: and adopting finite element analysis software to carry out simulation on the operation stage of the bridge, fully considering the combination condition of design loads such as temperature change, concrete shrinkage, creep, live load and the like under the normal use limit state, and taking the response value of the worst working condition under each load combination as a red early warning threshold. After the structure has red early warning and is triggered to enter structural evaluation, the full-bridge component is subjected to re-evaluation analysis by technical means of updating target reliability, updating a structural model, updating a load model, correcting live load and resistance component coefficients and the like. Based on the updated calculation result, the response value of the worst working condition can be fed back to the structure early warning; (2) monitoring statistics: and performing simple data processing according to the monitoring data to obtain actual measurement values of all the early warning indexes, and taking actual measurement statistical values of all the indexes as yellow early warning thresholds. In general, the measured statistics should take statistics with a 95% assurance rate. Along with the increase of the bridge operation years, the actual measurement statistical data is accumulated more and more, and the actual measurement statistical value can be fed back to the structure early warning after the next evaluation; (3) specification limits: according to the relevant specifications issued by the country or place. The standard limit value is the most severe requirement for the threshold value, and the structural early warning index is generally not allowed to reach or be very close to the standard limit value.
The structure early warning flow is shown in fig. 5. Comparing the measured value of the early warning index with a set threshold value, so as to judge what early warning state the structure enters: 1) When the measured value of the early warning index does not exceed any threshold value, the structural early warning state is not triggered and normal monitoring is returned; 2) When the measured value of the early warning index exceeds the yellow early warning threshold value, starting yellow early warning, focusing on abnormal conditions, and increasing sampling frequency of monitoring data; 3) There are three ways to initiate the red warning: firstly, the measured value of the early warning index exceeds a red early warning threshold; secondly, a certain early warning index in the structural response indexes continuously generates yellow early warning for a plurality of times within a certain time interval, or three or more indexes in the structural response indexes simultaneously generate yellow early warning; and thirdly, an extreme emergency such as earthquake, super typhoon, major traffic accident or ship collision event occurs. And the structural evaluation is immediately triggered during the red early warning, so that the damage condition of the bridge member is comprehensively and deeply evaluated. 4) And after the red early warning trigger structure is evaluated, resetting the two layers of early warning thresholds according to the updated actual measurement statistic value of the early warning index and the updated finite element calculation result.
The off-line early warning mainly comprises structural state early warning (static index and dynamic index early warning) and trend early warning. The structural static index early warning is realized by a structural static response index comparison method. The static response index comparison is firstly carried out by carrying out correlation analysis on the structural static response and the environmental parameters, and establishing a correlation function of the structural response and the environmental variables (mainly wind and temperature). And then analyzing the data in the unknown state by utilizing the functional relation, filtering the influence of environmental factors to obtain a structure quasi-constant load state, and comparing the current structure state obtained by analysis with a corresponding static response index of a bridge-forming constant load reference state to achieve the early warning of the abnormal structure state. The structural static index early warning flow is shown in figure 6. The structure dynamic index early warning method is various, and the main stream method is to realize dynamic early warning by comparing the structure dynamic response indexes. The power index early warning flow is shown in figure 7. The trend early warning mainly considers the development of the accumulated damage of the structure along with time, and analyzes and predicts the accumulated damage. The predicted content includes static indexes (mainly internal structural force and linear shape), frequency and the like. The prediction method adopts regression analysis and time sequence analysis. After each time of obtained structure quasi-constant load state data, trend analysis is also needed to obtain the change trend of the quasi-constant load state along with time, so as to grasp the change trend or rule of the whole structure state.
The structural state evaluation module is the final achievement of the monitoring system and is also the part with the greatest technical difficulty in health monitoring. The invention sets an evaluation method taking monitoring data and structural mechanics model analysis as a basis and a variant comprehensive analytic hierarchy process as a core. The main analysis method comprises the following steps: the method comprises a analytic hierarchy process, a model comparison process, a statistical analysis evaluation process and an evaluation process based on structural vibration of a health monitoring system.
Wherein the on-line evaluation is mainly to evaluate each monitoring item in the health monitoring system. The online evaluation mainly adopts an analytic hierarchy process to score each monitoring sub-item of the health monitoring system, and weights the score to obtain the score of the whole health monitoring system. The hierarchical analysis index structure is shown in fig. 8.
The off-line evaluation is a heavy difficulty part in bridge health monitoring, and the invention provides the following method, and the specific method is selected according to actual conditions. 1) The basic thought of the model comparison method is to establish a theoretical mechanical model of the structure, calculate and obtain mechanical behavior indexes of the structure under the action of various boundaries and outside, and compare and analyze the mechanical behavior indexes with response parameters monitored by a system by taking the mechanical behavior indexes as a reference, and analyze the actual stress and the operation condition of the structure according to the difference degree, the rule and the like of the mechanical behavior indexes and the response parameters. 2) The statistical analysis and evaluation method needs to carry out statistical analysis on the manual inspection result, the expert questionnaire result and the evaluation result of the health monitoring system, score each content and weight the score to calculate the integral state score of the bridge structure, and finally, the comprehensive state evaluation of the bridge is realized, and the basic flow is shown in figure 9. 3) The method is a commonly accepted method with practical application value at present, combines multidisciplinary technologies such as system identification, vibration theory, vibration test, signal acquisition and analysis, extracts characteristic quantities reflecting structural damage, and realizes structural health monitoring and evaluation by comparing the characteristic quantities with corresponding information in a structural nondestructive state. The main methods currently used are: (1) a method based on the measured vibration frequency; (2) a method based on the measured vibration frequency, mode and their derived amounts such as compliance, mode curvature; (3) a method based on the measured frequency response function. (4) A method based on the measured strain mode.
User interface subsystem:
the subsystem is used for displaying various data to a user in real time according to the requirement, providing a friendly man-machine interaction interface, receiving control and input of the user to the system, three-dimensional inquiry and online analysis of monitoring data and the like, and periodically pushing data analysis reports of the structure. The user interface subsystem aims to realize centralized operation control and information display of the multiple bridge health monitoring systems by adopting an informatization technology, provides rich graphic and text information for bridge structure remote monitoring, and finally forms a comprehensive informatization platform with complete functions, open system and advanced technology. The method mainly provides monitoring data analysis results for related personnel such as bridge management units, scientific research units, design units, maintenance units, structural engineers and the like, and meets the human-computer interface of monitoring management application of bridge management personnel. The user interface subsystem is a window for interaction between the bridge comprehensive monitoring system and a user, and the requirements of different users are met, and the main functional requirements are as follows: 1) Based on B/S architecture client software development, a convenient inspection information input interface and a data conversion function are provided; 2) The real-time monitoring data and the analysis result can be displayed in a graphical mode, and various display modes can be provided according to different users; 3) Providing rich graphical display interfaces, friendly man-machine interaction interfaces and simple and visual display effects; 4) Analyzing content according to the monitoring type and the data, adopting graphs, tables and characters, and providing synchronous comparison of related item graphs to truly reflect the working condition of the bridge; 5) The remote information publishing and sharing and remote authorization control capability are provided; 6) The display and operation interface is friendly in style, reasonable in layout, convenient to operate, various in query means and detailed in classification; 7) In the three-dimensional model monitoring interface used by the bridge manager, the structure response such as roaming, measuring point position display, dynamic display of monitoring values, deformation and the like, and the display of analysis results and the like can be performed.
The specific steps from field data acquisition, maintenance of a data transmission network, field power supply control, monitoring data storage, management, statistical analysis and bridge health state evaluation all need the support of various professional software. The software system design is based on the principle of reliability, practicality, completeness, openness and advanced, adopts the concept of B/S, C/S mixing, constructs a software system structure, adopts a B/S structure for software with inquiry access function, and can complete complex functions such as data acquisition, mathematical modeling, acquisition control and the like, and adopts a C/S structure. According to the logic flows of data information acquisition, transmission, application and storage, the whole software system is divided into: the system comprises an integrated application software layer, a business support software layer, an infrastructure software layer and an operating system software layer, wherein data information is transmitted in a progressive manner and interacted between the layers. The software hierarchy is shown in fig. 10.
1) The bridge model is displayed in a three-dimensional model, so that free roaming monitoring of the whole bridge and local view angles can be realized. The measuring parameters of each measuring point of the bridge can be monitored in real time, the bridge data is displayed, recorded and printed in real time in a digital or graph form, the measuring point data can be set according to the requirements, the original data can be subjected to filtering, calculation and other processes, and the related calculation of the structural model can be added.
2) The monitoring data can be stored in various database forms, can be used for inquiring historical data, and can also be used for directly generating EXCEL or other forms of reports.
3) The operation interface is clear and visual, and the tool bar and the buttons are operated. The display interface can be divided into a main interface and each sub-interface, and the interfaces are flexibly switched. The interface pattern may be modified as desired by the customer.
4) The graphical representation of the data includes time history graphs, X/Y plots, simulated graphs, histograms, and the like.
5) The system has the data out-of-limit alarm function, and when the alarm information is uploaded on site in real time, the host can generate obvious alarm pictures and alarm information, and can provide various multimedia prompts such as audible and visual alarm.
6) Each user in the system can be managed with the password and the operation authority, different system access and operation authority levels can be allocated to different users, and the safety of the running system is ensured.
7) The management function of printing the system information is realized, and the functions of real-time printing, timing printing and random printing are provided. Printing of graphics, reports, curves, alarm information, various statistical calculation results and the like is supported.
8) On-line editing, maintaining, modifying and expanding functions. The system software meets the requirements of the openness standard and meets the requirements of the aspects of expansion of the database capacity, enhancement of the system software functions and the like.
Manual auxiliary management subsystem:
the manual inspection module is incorporated into a system architecture, so that automatic monitoring and manual inspection of the system are combined, potential safety hazard problems are automatically raised through an early warning system, management and maintenance tasks are distributed to management and maintenance units, and relevant personnel are used for uploading detection results to the management and maintenance units after in-situ investigation, so that a management closed loop is formed. In addition, the method is compatible with the input of periodic manual inspection records, the inspection content mainly comprises conventional inspection and periodic inspection, the conventional inspection comprises the appearance inspection of main structural members, auxiliary facilities and the like of the bridge, and the periodic inspection comprises the complete linear observation of the full bridge, the disease observation of key positions and the like. The specific requirements are as follows: 1) Providing functions of engineering management, contract management, cost management, engineering history file inquiry, completion drawing, planning and guiding, on-bridge event management, traffic operation, emergency management, maintenance construction operation assessment management and the like related to bridge maintenance activities; 2) Performing task management and flow management on maintenance engineering; 3) The management unit is assisted to reasonably identify, organize and implement various bridge inspection and maintenance activities; 4) And establishing an IT software supporting system based on a network to realize networked information management.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (4)
1. The urban bridge group health monitoring system is characterized by comprising an automatic sensing and testing subsystem, a data management and control subsystem, a comprehensive early warning and safety evaluation subsystem, a user interface subsystem and a manual auxiliary management and maintenance subsystem;
the automatic sensing and testing subsystem monitors the changes of structural stress and temperature, structural deformation and displacement and structural acceleration parameters during the operation of the structure according to a certain signal acquisition strategy and with reasonable distribution and sensor selection schemes, so as to obtain original signals of voltage, current, frequency and optical signals; after being processed, the data are converted into digital signals and transmitted to a data management and control subsystem;
the data management and control subsystem completes verification of the monitoring data, and stores, manages and visualizes all the original data, the monitoring data, the health evaluation data and the like in a structured manner; the data transfer station is used for completing signal transmission with each subsystem; the subsystem stores and manages all data classifications generated by each system in a long term and unified way in the running process of the total system in a database mode;
the structure early warning and evaluating system performs statistical analysis by calling real-time monitoring data of the data management and control subsystem, so that the state change of the structure is quickly known and mastered, and the early warning is timely triggered when the bridge structure state is abnormal or has abnormal symptoms; after structural early warning, comprehensively utilizing data acquired automatically by a monitoring system and information acquired by periodic manual detection, evaluating the health condition of the bridge by combining finite element model simulation analysis and damage recognition technology, giving corresponding decision suggestions such as bridge maintenance, repair requirements and the like, and forming a health state evaluation report;
the user interface subsystem is used for realizing the function of displaying various data to a user in real time according to the requirement, providing a friendly man-machine interaction interface, receiving control and input of the system by the user, three-dimensional inquiry and online analysis of monitoring data and the like, and periodically pushing data analysis reports of the structure;
the manual auxiliary management and maintenance subsystem brings in the manual inspection module into a system architecture, so that automatic monitoring and manual inspection of the system are combined, potential safety hazard problems are automatically proposed through an early warning system, management and maintenance tasks are distributed to management and maintenance units, and relevant personnel upload detection results to the management and maintenance units after in-situ investigation, so that a management closed loop is formed.
2. The urban bridge group health monitoring system according to claim 1, wherein said data management and control subsystem comprises a sensor module, an automated data acquisition and transmission module, a data processing and control module;
the sensor module designs a sensing system aiming at each bridge structure according to actual cost and structure limit, and realizes a monitoring target by using a limited sensor;
the automatic data acquisition and transmission module is used for acquiring and transmitting signals generated by the sensor and comprises a field data acquisition layer, a data remote summarization layer and a data terminal access layer;
the field data acquisition layer consists of various sensors and acquisition instruments, is connected with the field data acquisition layer through a field bus RS485 and an Ethernet, and acquires output signals of the sensors through the acquisition instruments and performs signal preprocessing and pre-storage;
the data remote summarizing layer comprises a communication server and a switch, and transmits and gathers the signals acquired by the field acquisition layer to a field remote transmission network access part;
the data terminal access layer comprises an optical fiber private line or a high-speed mobile network, and transmits the data of the data remote summary layer to a remote cluster data management platform;
after the data are remotely summarized to the data processing and analyzing server, the data processing and controlling module performs the collection, processing, analysis, display, archiving and storage of all signals and sends the processed and analyzed data to the structural safety assessment system server for structural safety condition assessment and monitoring and assessment report generation.
3. The urban bridge group health monitoring system according to claim 1, wherein the structural pre-warning and assessment system comprises a structural safety pre-warning module and a structural status assessment module; the structure safety early warning module comprises an online early warning module and an offline early warning module; the structure state evaluation module comprises an online evaluation module and an offline evaluation module;
the online early warning module and the online evaluation module automatically generate an evaluation report according to the daily monitoring data;
and the offline early warning module and the offline evaluation module finish the evaluation report on line according to the periodic monitoring data.
4. The urban bridge group health monitoring system according to claim 1, wherein the manual auxiliary management subsystem is further compatible with the entry of periodic manual inspection records, the inspection records comprise regular inspection and periodic inspection, the regular inspection comprises appearance inspection of main structural members and auxiliary facilities of the bridge, and the periodic inspection comprises complete linear inspection of the full bridge and disease inspection of critical positions.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117291350A (en) * | 2023-11-24 | 2023-12-26 | 深圳市城市交通规划设计研究中心股份有限公司 | Urban bridge group safety state evaluation system and evaluation method |
| CN117314397A (en) * | 2023-11-29 | 2023-12-29 | 贵州省公路建设养护集团有限公司 | Safety inspection method based on bridge construction, electronic equipment and storage medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117291350A (en) * | 2023-11-24 | 2023-12-26 | 深圳市城市交通规划设计研究中心股份有限公司 | Urban bridge group safety state evaluation system and evaluation method |
| CN117291350B (en) * | 2023-11-24 | 2024-03-26 | 深圳市城市交通规划设计研究中心股份有限公司 | Urban bridge group safety state evaluation system and evaluation method |
| CN117314397A (en) * | 2023-11-29 | 2023-12-29 | 贵州省公路建设养护集团有限公司 | Safety inspection method based on bridge construction, electronic equipment and storage medium |
| CN117314397B (en) * | 2023-11-29 | 2024-02-02 | 贵州省公路建设养护集团有限公司 | Safety inspection method based on bridge construction, electronic equipment and storage medium |
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