CN107493317B - BDS-based bridge structure relative deformation monitoring system and method - Google Patents
BDS-based bridge structure relative deformation monitoring system and method Download PDFInfo
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Abstract
The invention belongs to the field of bridge structure monitoring, and provides a BDS-based bridge structure relative deformation monitoring system aiming at the technical problems that the existing bridge structure monitoring system cannot share a cloud platform and has large positioning error under some special weather conditions, which comprises: the BDS system-based positioning terminal comprises a plurality of BDS system-based positioning terminals, a communication module, a multi-bridge comprehensive cloud management platform connected with a communication network and an alarm module; the positioning terminals are respectively fixed on the bridge and arranged at intervals, and the positioning terminals respectively collect positioning information of the positioning terminals in real time; the communication module is used for receiving the positioning information of the positioning terminal and sending the positioning information of the positioning terminal to the multi-bridge comprehensive cloud management platform; the multi-bridge comprehensive cloud management platform is used for receiving positioning information of the positioning terminals and determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals.
Description
Technical Field
The invention relates to the field of bridge structure monitoring, in particular to a BDS-based bridge structure relative deformation monitoring system and method.
Background
The BDS, the BeiDou Navigation Satellite System (BDS), is a self-developed global Satellite Navigation System in china. The third mature satellite navigation system following the united states Global Positioning System (GPS), russian GLONASS satellite navigation system (GLONASS).
The BDS is applied to navigation and is also commonly used in bridge dynamic monitoring, and the main method is that a positioning module of the BDS is fixed on a bridge, and the positioning module on the bridge can also have certain displacement along with the bridge if the bridge deforms in the using process by means of positioning information fed back by the positioning module. The displacement of the positioning module can be detected through the BDS, and when the displacement is too large (exceeds a threshold value), an alarm module can give an alarm to a bridge monitor.
However, the problem of this method is mainly the problem of positioning accuracy, and it is known that whether the positioning module of GPS or BDS is the positioning module of code positioning, the positioning accuracy is generally 3m for civil use and 0.3m for military use, and this positioning accuracy is not applicable in bridge dynamic monitoring.
Therefore, a differential positioning technology is provided, which is based on the principle that a reference station is firstly arranged, the precise coordinate of the reference station is repeatedly and precisely measured by a conventional method, the reference station obtains positioning data through a satellite (GPS or BDS), the positioning data is compared with the measured precise coordinate to obtain the error of a positioning system, and then the error is told to a nearby positioning module, so that the error and interference (approximately the same environmental interference is received by the reference station and the nearby positioning module) can be eliminated, and high-precision positioning data can be obtained. By applying the method, when the three gorges dam is built, a plurality of differential reference stations are built nearby, centimeter-level positioning accuracy is obtained, and ultra-accurate dam butt joint is realized.
However, when the differential positioning technology is applied to dynamic bridge monitoring, the reference stations need to be repeatedly and accurately measured by a conventional method to obtain accurate coordinates, so that a large amount of manpower and material resources are required to be invested in obtaining the accurate coordinates of each reference station. The assumption that a reference station is established for each bridge has a problem of high cost in execution.
After the reference station is established, there is a certain distance between the reference station and the bridge, in some mountainous areas, the bridge usually spans two mountains, and the reference station is usually located at the top of the mountains to ensure strong signal strength with the satellite. The environment of the mountainous area is complicated, and particularly, weather between a mountain top and a bridge is greatly different, such as heavy fog weather, and the visibility on the bridge is usually obviously lower than that on the mountain top (the bridge and the mountain top have certain height difference). When the fog is scattered, the fog on the bridge is scattered before the fog on the mountain top, and under the condition, the weather (or climate) between the reference station and the bridge has certain difference, so that the positioning information of the positioning module has a large error under some special conditions, and the alarm module can be mistakenly reported seriously.
And most of bridge structure monitoring systems of the coil monitor a single bridge, and no system capable of monitoring the bridge structure based on a cloud platform exists at present.
Disclosure of Invention
The invention provides a BDS-based bridge structure relative deformation monitoring system and method, aiming at the technical problems that the existing bridge structure monitoring system cannot share a cloud platform and has large positioning errors under some special weather conditions.
The basic scheme provided by the invention is as follows: bridge structures relative deformation monitoring system based on BDS includes: the BDS system-based positioning terminal comprises a plurality of BDS system-based positioning terminals, a communication module, a multi-bridge comprehensive cloud management platform and an alarm module;
the positioning terminals are respectively fixed on the bridge and arranged at intervals, and the positioning terminals respectively collect positioning information of the positioning terminals in real time;
the communication module is used for respectively receiving the positioning information of the positioning terminal and sending the positioning information of the positioning terminal to the multi-bridge comprehensive cloud management platform;
the multi-bridge comprehensive cloud management platform is used for respectively receiving positioning information of the positioning terminals and determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals;
the multi-bridge comprehensive cloud management platform sends the relative position information between the adjacent positioning terminals to the alarm module, and if the multi-bridge comprehensive cloud management platform determines that the relative position between the adjacent positioning terminals exceeds a threshold value, the alarm module gives an alarm.
The working principle and the advantages of the invention are as follows: compared with the GPS system, the BDS system has the main difference that the civil positioning precision of the BDS system in Asia-Pacific areas is obviously better than that of the GPS system. In the invention, the positioning terminals are respectively fixed on the bridge, so that the positioning terminals can monitor the displacement or deformation of the bridge structure. The positioning terminals are spaced apart from each other to prevent a plurality of positioning terminals from being fixed to one point. The positioning terminals respectively acquire their own positioning information, and the principle of the positioning terminals acquiring their own positioning information is based on the satellite of the BDS system, which is not described herein again.
After the positioning terminal obtains the self positioning information through the BDS system, the positioning information is sent to the multi-bridge comprehensive cloud management platform through the communication module, and the multi-bridge comprehensive cloud management platform determines the relative position between the adjacent positioning terminals according to the positioning information. If the relative position is within an error range (threshold), the alarm module is not operated. If the relative position exceeds the threshold, it indicates that the structure of the bridge has changed. The scheme monitors whether the bridge structure is changed or not by monitoring the change of the relative position between the adjacent positioning terminals.
The multi-bridge comprehensive cloud management platform can be understood as an existing cloud server. The multi-bridge comprehensive cloud management platform can share the positioning information of the positioning terminals, one multi-bridge comprehensive cloud management platform is matched with the plurality of positioning terminals and the plurality of communication modules, the coverage monitoring of bridges in one area can be realized, and the network coverage of a bridge structure monitoring system is realized through the multi-bridge comprehensive cloud management platform. Therefore, the multi-bridge comprehensive cloud management platform can compare the structural deformation of the monitored bridge, and can obtain the weather condition of the bridge area through the network, so that more accurate positioning and bridge structure monitoring information can be obtained. The communication module and the multi-bridge comprehensive cloud management platform can be connected in a GSM (global system for mobile communications), 3G/4G/5G (third generation/fourth generation/third generation) mode and the like. And can also can outwards publish the monitoring information of bridge structures through the network through cloud section server, make things convenient for social public to supervise. The multi-bridge comprehensive cloud management platform is used for receiving and processing positioning information of the positioning terminals, then determining the relative displacement change condition between adjacent positioning terminals according to the positioning information, and displaying the judgment result of bridge safety by calling the map. A user can call monitoring information in the multi-bridge comprehensive cloud management platform through a communication network, and remote wireless monitoring of a bridge structure is achieved.
In the prior art, a reference station needs to be constructed to ensure ideal positioning precision. However, in the application, in the bridge monitoring where the weather condition is complex and the span of the bridge is large, since the reference station and the bridge are in different weather environments, the error calibration capability of the reference station is very low, which results in very low positioning accuracy of other positioning modules on the bridge, and in this case, the situation of false alarm is very easy to occur. However, in the invention, the reference station is eliminated, and whether the bridge deforms or not is measured through the relative position between the adjacent positioning terminals. Between two adjacent positioning terminals, because the distance between the positioning terminals is close, the situation that the positioning error caused by complicated weather is different is discharged, and the positioning error caused by weather between two adjacent positioning terminals is basically the same in the scheme, so that the positioning error caused by weather is reduced by determining the relative position.
That is, in the prior art, the position of the positioning module is determined by absolute positioning, and whether the bridge structure has changed beyond a threshold is determined by comparing the change of the distance of the positioning module in the time domain. The existing bridge structure monitoring is also applied to monitoring buildings such as high buildings, stadiums and the like, and in order to monitor the risk of overall collapse and deformation, the monitoring and positioning modes are absolute positioning modes. In the scheme, a relative positioning mode is adopted, and whether the bridge changes beyond a threshold value or not is determined by collecting the relative position between adjacent positioning modules and judging the change of the relative position in space. The main theoretical basis of the innovation of the method is that through research on bridge collapse accidents, the fact that the strength of a certain section or a certain joint is insufficient is found, so that the collapse accidents occur, and the accidents of the whole bridge collapse are almost not generated (data sources, namely 'analysis (diagram) of partial bridge collapse accidents' published by Chinese design networks according to 12-13 2010). Therefore, the invention can completely depend on the monitoring of the relative position to achieve the effect of monitoring the bridge structure.
According to the BDS-based bridge structure relative deformation monitoring system, the existing absolute positioning mode is replaced by the relative positioning mode, so that the cost for establishing the reference station is reduced, errors caused by different weather conditions of the reference station and the bridge are avoided, and the positioning accuracy in a special environment is improved. The invention determines the variation of the bridge structure by determining the change of the relative position between the adjacent positioning terminals, achieves the aim of monitoring the bridge structure, avoids the problem of large positioning error under the condition of special weather in the existing differential positioning mode due to small weather difference between the adjacent positioning terminals, and improves the positioning accuracy under the special weather environment.
Furthermore, a plurality of positioning terminals are fixed in the area where the bridge is easy to deform and stress concentrate. Such an arrangement is intended for targeted monitoring of the bridge.
Further, the communication module is an independent unit. The design is to make the communication module independent, the types of the selectable communication modules are very many when the design is realized, the selection range is wide, and the communication modules with proper power and types can be selected according to the specific position condition of the bridge. If the GPRS module is selected in the mountainous area, signals are stable; in urban areas, 3G or 4G or even 5G modules can be selected, and the communication speed is higher.
Further, the communication modules are respectively arranged in the positioning terminals. The communication module is arranged in the positioning terminal to facilitate integral installation.
Further, the multi-bridge comprehensive cloud management platform is further used for determining the relative distance between adjacent positioning terminals according to the positioning information of the positioning terminals. The display of the relative position can be a virtual model, a model of the monitored bridge is built, monitoring points (namely the installation position of the positioning terminal) are marked on the model, then detailed mechanical analysis is carried out according to the change of the relative position, and the safety of the bridge is judged. However, the analysis process is longer and at least longer than the time for measuring the relative distance, so that the deformation quantity of the bridge structure can be judged more intuitively and conveniently by workers by introducing the parameter of the relative distance.
Further, the alarm module gives an alarm in a manner of giving an audible and visual alarm or sending a short message to a preset mobile phone number. The design is to give the alarm to the staff more timely and definitely.
The BDS-based bridge structure relative deformation monitoring method comprises the following steps:
a positioning step, namely fixing a plurality of positioning terminals on the bridge respectively, wherein the positioning terminals are arranged at intervals, and the positioning terminals are used for acquiring positioning information of the positioning terminals in real time respectively;
a communication step, in which the positioning information of the positioning terminal is sent to a multi-bridge comprehensive cloud management platform;
a processing step, namely determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals;
and an alarming step, namely, if the relative position between the adjacent positioning terminals is determined to exceed a threshold value by the multi-bridge comprehensive cloud management platform, alarming is given out.
By the method, under the condition of ensuring the precision, more accurate positioning can be realized in a special weather environment.
Drawings
FIG. 1 is a logic block diagram of a BDS-based bridge structure relative deformation monitoring system of the invention;
FIG. 2 is a schematic view of a simple beam bridge monitoring point;
FIG. 3 is a schematic view of an arch bridge monitoring point;
FIG. 4 is a schematic view of a cable-stayed bridge monitoring point;
fig. 5 is a schematic view of suspension bridge monitoring points.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: .
The embodiment is basically as shown in the attached figure 1:
the BDS-based bridge structure relative deformation monitoring method comprises the following steps:
the method comprises the following steps of positioning, namely fixing a plurality of positioning terminals on a bridge respectively, fixing the plurality of positioning terminals in an area where deformation and stress concentration easily occur on the bridge, and enabling the positioning terminals to acquire positioning information of the positioning terminals in real time respectively;
a communication step, in which the positioning information of the positioning terminal is sent to a multi-bridge comprehensive cloud management platform;
a processing step, namely determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals;
and an alarming step, namely, if the relative position between the adjacent positioning terminals is determined to exceed a threshold value by the multi-bridge comprehensive cloud management platform, alarming is given out.
In order to implement the method, a BDS-based bridge structure relative deformation monitoring system is further disclosed, which includes: the BDS system-based positioning terminal comprises a plurality of BDS system-based positioning terminals, a communication module, a multi-bridge comprehensive cloud management platform and an alarm module;
the positioning terminals are respectively fixed on the bridge and arranged at intervals, the positioning terminals are fixed in the area where deformation and stress concentration easily occur on the bridge, and the positioning terminals respectively collect positioning information of the positioning terminals in real time. The positioning terminal selects a positioning chip pushed out in 2017 and is loaded with a solar cell.
The communication module is used for receiving the positioning information of the positioning terminal and sending the positioning information of the positioning terminal to the multi-bridge comprehensive cloud management platform. In order to meet the requirement of a mountain area, the GSM module selected by the communication module is used for communication, so that the communication quality is ensured.
The multi-bridge comprehensive cloud management platform is used for receiving positioning information of the positioning terminals and determining the relative position and the relative distance between adjacent positioning terminals according to the positioning information of the positioning terminals;
the multi-bridge comprehensive cloud management platform sends the relative position information between the adjacent positioning terminals to the alarm module, if the multi-bridge comprehensive cloud management platform determines that the relative position between the adjacent positioning terminals exceeds a threshold value, the alarm module gives an alarm, and specifically, the alarm module sends a short message to a preset mobile phone number through sound-light alarm.
Example 2
Compared with embodiment 1, the difference is only that the communication modules are respectively arranged in the positioning terminals.
Comparative example 1
The differential monitoring system for bridge structure based on BDS, which adopts the existing differential positioning mode, comprises:
the reference station repeatedly and accurately measures the accurate coordinates of the reference station by a conventional method, obtains positioning data by a satellite BDS system, and compares the positioning data with the measured accurate coordinates to obtain the system error of the positioning information;
the positioning terminals are respectively fixed on the bridge and arranged at intervals, and the positioning terminals respectively acquire positioning information of the positioning terminals in real time to obtain the position information of the positioning terminals;
the communication module transmits the system error and the positioning terminal position information obtained by the reference station to the multi-bridge comprehensive cloud management platform;
the multi-bridge comprehensive cloud management platform calibrates the position information of the positioning terminal according to the system error to obtain the accurate information of the positioning terminal;
and the alarm module is used for comparing the accurate information of the positioning terminals on the same positioning terminal time axis by the multi-bridge comprehensive cloud management platform to obtain an offset, and giving an alarm if the offset exceeds a threshold value.
In order to embody the comparison and the effectiveness, various bridges are selected for comparison and monitoring. Mainly simple girder bridges, arch bridges, cable-stayed bridges and suspension bridges.
The simple beam bridge is one of the most common bridges, the bridge typically uses a Nandringjiang grand bridge on Kunming's line and a three-pond 3 # bridge on Chuxiong south permanent line, the mechanical structure is relatively simple, the geological topography and traffic condition under the bridge need to be combined in the process of laying control points, the monitoring points are arranged on bridge spans with relatively prominent potential safety hazards, and the bridge spans are arranged at the edge positions where the bridge deck is not easy to damage, as shown in figure 2.
The monitoring points of the arch bridge are arranged at the arch crown part, and for the hollow type stone arch bridge and the concrete double arch bridge, the monitoring points are required to be respectively arranged at the arch crown and the bridge deck corresponding to the two arch feet. As shown in fig. 3.
The cable-stayed bridge generally comprises a stay cable, a tower column, a main beam, a pier and a bridge abutment, wherein only one monitoring point is arranged at each stress part of a plate beam, and a plurality of stations are arranged in the full bridge. As shown in fig. 4.
The suspension bridge generally comprises a main cable, a suspension cable, a tower and a beam, only one monitoring point is arranged at each stress part of the plate beam, and a plurality of stations are arranged in the full bridge. As shown in fig. 5.
The systems provided by the embodiments 1 and 2 and the comparative example 1 are applied to the monitoring of various bridge structures, data are obtained in a real-time monitoring mode, then the artificial ultrasonic waves and the laser positioning are used as standards, the bridge is monitored under different weathers, and errors generated by the embodiments 1 and 2 and the comparative example 1 are measured.
The measurement objects comprise a Nandringjiang grand bridge, a new dam reservoir bridge, a Songyuan bridge, a spring bridge, a tree bottom bridge, a red flag bridge, a lanuguang bridge, a Ronchun bridge and a Temple bridge. The bridge monitoring is carried out by the system based on the differential positioning technology provided in comparative example 1. The systems provided by the embodiment 1 and the embodiment 2 are installed to the monitoring points of the bridges for monitoring, variables are controlled, and the positions of the monitoring points are ensured to be the same.
The information of each bridge is shown in table 1.
According to the number of monitoring points in table 1, the positioning terminals in embodiments 1 and 2 are fixed on the monitoring points of a bridge, and then under the condition that each bridge normally passes through the vehicle, ultrasonic and laser positioning (red light has better penetrability and the offset of the bridge can be measured in foggy weather) is performed in a foggy stage (visibility is reduced to 1-10 km) in sunny weather, a foggy stage (visibility is restored to 1-10 km) in foggy weather and a foggy stage (visibility is reduced to 1-10 km) in foggy weather, wherein the main measuring method can be that a transmitting end and a receiving end are arranged at two ends of the bridge in sunny weather, so that light can be tightly attached to the surfaces of the monitoring points of the bridge, the monitoring points can shield laser due to shaking and displacement generated by the bridge, and different numbers of laser transmitting sections and receiving ends are arranged, the displacement of each monitoring point of the bridge can be monitored, and the monitoring precision can reach centimeter or even millimeter level; ultrasonic monitoring is to assist and verify laser monitoring, and foggy weather has little influence on ultrasonic).
The errors of the monitoring points obtained in the examples 1, 2 and 1 in various environments are recorded by using ultrasonic wave and laser positioning as references, absolute values of the errors are taken, the absolute values are added, and the average value of the errors is obtained by dividing the absolute values by the number of the monitoring points. This gives the average error of comparative example 1.
Although the results obtained in examples 1 and 2 are relative parameters, the relative parameters can be obtained by subtracting the absolute positions of the monitoring points for ultrasonic positioning and laser positioning, and the absolute values of the relative parameters obtained by subtracting the two relative parameters are added, and then divided by the number of relative parameters to obtain the average error value. The results in a sunny day are shown in table 2.
From table 2, it can be concluded that, in clear weather, the bridge monitoring systems provided in embodiments 1 and 2 and comparative example 1 have the accuracy in the centimeter level, and can meet the bridge monitoring requirement.
The results during the foggy period (reduced visibility to 1-10 km) in foggy weather are shown in table 3.
By comparing the example 1, the example 2 and the comparative example 1 and combining the number of the reference stations in the table 1, we can conclude that the positioning accuracy of the example 1 and the example 2 is obviously due to the comparative example 1 when the number of the reference stations is 1-2 in the fogging stage; when the number of reference stations is 3, the positioning accuracy of examples 1 and 2 is substantially the same as that of comparative example 1.
The results in the foggy phase (visibility below 1 km) in foggy weather are shown in table 4.
By comparing the example 1, the example 2 and the comparative example 1 and combining the number of the reference stations in the table 1, we can conclude that the positioning accuracy of the example 1 and the example 2 is obviously due to the comparative example 1 when the number of the reference stations is 1-2 in the dense fog stage; when the number of reference stations is 3, the positioning accuracy of examples 1 and 2 is substantially the same as that of comparative example 1.
The results of the foggy period (visibility restored to 1-10 km) in foggy weather are shown in Table 5.
By comparing the example 1, the example 2 and the comparative example 1 and combining the number of the reference stations in the table 1, we can conclude that the positioning accuracy of the example 1 and the example 2 is obviously due to the comparative example 1 when the number of the reference stations is 1-2 in the fogging stage; when the number of reference stations is 3, the positioning accuracy of examples 1 and 2 is substantially the same as that of comparative example 1.
It can be seen from the table that the positioning accuracy of the red-flag bridge is basically affected by weather, and in field observation, it is found that the weather conditions of the reference station of the red-flag bridge and the monitoring point are basically the same, that is, the distance between the reference station and the monitoring point is short and the errors caused by weather conditions are basically the same.
The theory of the people is verified by combining the comparative experimental data, the relative position is used for replacing the absolute position to monitor the bridge structure, and the positioning precision is obviously caused by the existing absolute position monitoring mode under the specific weather condition.
In other embodiments, the invention also aims at the problem of comprehensive monitoring of regional bridges, and particularly discloses a bridge cloud monitoring system based on a Beidou satellite. The multi-bridge comprehensive cloud management platform comprises an online map, a database and a data processing unit; the monitoring terminal is divided into a field monitoring terminal and a user terminal; the on-site detection terminal includes: the BDS system-based positioning terminal comprises a plurality of BDS system-based positioning terminals, a communication module and an alarm module; the user terminal includes: display devices such as computers, LED screens, etc.; a communication system includes: beidou satellite system, 4G/5G data communication module. The positioning terminals are respectively fixed on the bridge, the positioning terminals are distributed according to the stress distribution condition, and the positioning terminals respectively acquire the positioning information of the positioning terminals in real time; the communication module is used for receiving the positioning information of the positioning terminal and sending the positioning information of the positioning terminal to the comprehensive cloud management platform; the comprehensive cloud management platform is used for receiving and processing the positioning information of the positioning terminals, then determining the change condition of the relative displacement between the adjacent positioning terminals according to the positioning information, and displaying the judgment result of the bridge safety by calling the online map.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. Bridge structures relative deformation monitoring system based on BDS, its characterized in that includes: the BDS system-based positioning terminal comprises a plurality of BDS system-based positioning terminals, a communication module, a multi-bridge comprehensive cloud management platform connected with a communication network and an alarm module;
the positioning terminals are respectively fixed on the bridge, the positioning terminals are arranged at intervals, the positioning terminals are fixed in an area where deformation and stress concentration of the bridge easily occur, and the positioning terminals respectively collect positioning information of the positioning terminals in real time;
the communication module is used for receiving the positioning information of the positioning terminal and sending the positioning information of the positioning terminal to the multi-bridge comprehensive cloud management platform;
the multi-bridge comprehensive cloud management platform is used for receiving positioning information of the positioning terminals, determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals, and storing map information related to the monitored bridge in the multi-bridge comprehensive cloud management platform;
the multi-bridge comprehensive cloud management platform sends the relative position information between the adjacent positioning terminals to the alarm module, and if the multi-bridge comprehensive cloud management platform determines that the relative position between the adjacent positioning terminals exceeds a threshold value, the alarm module gives an alarm.
2. The BDS-based bridge structure relative deformation monitoring system of claim 1, wherein the plurality of positioning terminals are fixed on the bridge in an area prone to deformation and stress concentration.
3. The BDS-based bridge structure relative deformation monitoring system of claim 1, wherein the communication module is an independent unit.
4. The BDS-based bridge structure relative deformation monitoring system of claim 1, wherein the communication modules are respectively arranged in positioning terminals.
5. The BDS-based bridge structure relative deformation monitoring system of claim 1, wherein the multi-bridge integrated cloud management platform is further configured to determine a relative distance between adjacent positioning terminals according to the positioning information of the positioning terminals.
6. A BDS-based bridge structure relative deformation monitoring system according to any one of claims 1 to 5, wherein the alarm module gives an alarm by sound and light alarm or sending a short message to a preset mobile phone number.
7. The BDS-based bridge structure relative deformation monitoring method is characterized by comprising the following steps of:
the method comprises the following steps of positioning, namely fixing a plurality of positioning terminals on a bridge respectively, wherein the positioning terminals are arranged at intervals, fixing the positioning terminals in an area where deformation and stress concentration are easy to occur on the bridge, and enabling the positioning terminals to acquire positioning information of the positioning terminals in real time respectively;
a communication step, in which the positioning information of the positioning terminal is sent to a multi-bridge comprehensive cloud management platform;
a processing step, namely determining the relative position between adjacent positioning terminals according to the positioning information of the positioning terminals;
and an alarming step, namely, if the relative position between the adjacent positioning terminals is determined to exceed a threshold value by the multi-bridge comprehensive cloud management platform, alarming is given out.
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| CN113330283B (en) * | 2018-08-25 | 2023-03-21 | 山东诺方电子科技有限公司 | Data reliability evaluation and calibration method for atmospheric pollution detection equipment |
| CN111948683B (en) * | 2020-07-20 | 2023-08-04 | 中铁大桥科学研究院有限公司 | Method for detecting and correcting space linearity of main girder of cable-stayed bridge |
| CN112966435B (en) * | 2021-03-01 | 2022-04-01 | 重庆交通大学 | Bridge deformation real-time prediction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364484Y (en) * | 2009-01-21 | 2009-12-16 | 重庆交通大学 | Remote bridge monitoring system based on B/S mode |
| CN103090825A (en) * | 2012-12-10 | 2013-05-08 | 陕西西北铁道电子有限公司 | Compatible railroad bridge condition monitoring system based on Beidou satellite |
| CN103676857A (en) * | 2013-12-02 | 2014-03-26 | 深圳市赛瑞景观工程设计有限公司 | Solar ecological environment monitoring distributed-type system |
| CN104237909A (en) * | 2013-10-30 | 2014-12-24 | 安徽恩米特微电子股份有限公司 | Building health monitoring evaluation system based on BDS/GPS |
| CN105444726A (en) * | 2014-08-28 | 2016-03-30 | 中建四局第六建筑工程有限公司 | Method and system for building structure deformation monitoring based on Beidou satellite |
| CN106767664A (en) * | 2016-11-29 | 2017-05-31 | 中南安全环境技术研究院股份有限公司 | Large Span Bridges deformation method of real-time based on dipper system |
-
2017
- 2017-06-30 CN CN201710526747.4A patent/CN107493317B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201364484Y (en) * | 2009-01-21 | 2009-12-16 | 重庆交通大学 | Remote bridge monitoring system based on B/S mode |
| CN103090825A (en) * | 2012-12-10 | 2013-05-08 | 陕西西北铁道电子有限公司 | Compatible railroad bridge condition monitoring system based on Beidou satellite |
| CN104237909A (en) * | 2013-10-30 | 2014-12-24 | 安徽恩米特微电子股份有限公司 | Building health monitoring evaluation system based on BDS/GPS |
| CN103676857A (en) * | 2013-12-02 | 2014-03-26 | 深圳市赛瑞景观工程设计有限公司 | Solar ecological environment monitoring distributed-type system |
| CN105444726A (en) * | 2014-08-28 | 2016-03-30 | 中建四局第六建筑工程有限公司 | Method and system for building structure deformation monitoring based on Beidou satellite |
| CN106767664A (en) * | 2016-11-29 | 2017-05-31 | 中南安全环境技术研究院股份有限公司 | Large Span Bridges deformation method of real-time based on dipper system |
Non-Patent Citations (3)
| Title |
|---|
| "Non-linear Chaotic Analysis of Bridge Health Monitoring Information based on Phase Space Correlation Dimension";Jianting Zhou等;《2010 3rd International Congress on Image and Signal Processing》;20101018;4096-4100 * |
| "基于北斗/GPS与GIS的桥梁变形监测系统研究";席恩伟;《中国优秀硕士学位论文全文数据库》;20150915(第9期);C034-68 * |
| "基于有限测点的悬索桥位移场获取与安全评估";周建庭等;《科学技术与工程》;20170608;第17卷(第16期);139-145 * |
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