Method for railway bridge state monitoring

A bridge and state technology, applied in the field of railway bridge state monitoring, can solve the problems of inability to observe small changes of bridges well, the inaccessible points of displacement sensors cannot be measured, and the data cannot meet the safety monitoring of railway bridges, etc.

Inactive Publication Date: 2019-10-25
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many related equipment and products for real-time monitoring of railway bridge displacement in China. Bridge displacement monitoring applied to traffic safety is mostly based on bridge stress and strain monitoring, monitoring of winding, temperature, support displacement, pier inclination, etc., but due to common The application requirements and background of bridges and railway bridges are quite different, and the monitoring data cannot meet the needs of railway bridge safety monitoring, so the technology and products based on deformation monitoring of ordinary bridges are not suitable for the safety monitoring of railway bridges
At present, there are many examples of bridge deformation monitoring. There are many limitations and inconveniences in the deformation monitoring of large bridges by conventional methods.
For example, the total station has disadvantages such as asynchronous measuring points, difficult measurement of large deformation, and poor real-time performance; while the displacement sensor also has shortcomings such as inability to measure inaccessible points and difficulty in lateral displacement measurement; there are also disadvantages such as the use of global satellite systems (GPS) technology for bridge deformation monitoring
However, at present, many bridge safety monitoring systems are aimed at highway bridges, and there is no effective bridge safety monitoring system for railway bridges with their own characteristics. Minor changes in bridges. At present, many bridges in China have been built for many years. The safety of railway bridges seriously affects the safe operation of railways. It is imperative to establish a special railway bridge safety monitoring system.

Method used

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Embodiment

[0022] The present invention realizes through following technical scheme:

[0023] A method for state monitoring of railway bridges, the following steps are performed in sequence:

[0024] A: The monitoring point receiver obtains its own antenna position by tracking the electromagnetic waves continuously transmitted by CRNSS satellites to the whole world;

[0025] B: The receiver at the monitoring point simultaneously receives the differential data sent by the base station;

[0026] C: Use real-time dynamic measurement technology to obtain high-precision three-dimensional coordinates after calculation;

[0027] D: After the coordinates of the monitoring point correspond to the map, the position of the monitoring point is obtained, and compared with the original position saved before, the relative displacement of the monitoring point is obtained;

[0028] E: When the relative displacement of the monitoring point is greater than a certain value within a certain period of time,...

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Abstract

The invention discloses a method for railway bridge state monitoring. The method for railway bridge state monitoring sequentially comprises the steps that: a monitoring point receiver tracks electromagnetic wave, which is continuously transmitted to the whole world by a CRNSS satellite; the monitoring point receiver receives differential data sent by base stations at the same time; by utilizationof a real-time dynamic measurement technology, a high-precision three-dimensional coordinate is obtained by calculation; after the coordinate of a monitoring point corresponds to a map, the position of the monitoring point is obtained; the position of the monitoring point is compared with the original position stored before, so that the relative displacement of the monitoring point is obtained; and, when the relative displacement of the monitoring point is greater than a certain value in a certain time period, early warning or alarming is triggered. The problem that sound special railway bridge security monitoring does not exist in the prior art can be solved; the method for railway bridge state monitoring is provided; when the method for railway bridge state monitoring is used, before a bridge collapses, the fact that the bridge deformation is beyond the pre-set danger level is monitored; the fact can be sent to a station monitoring centre through a 3G network; and thus, the monitoring centre can know the dangerous condition of a road in time.

Description

technical field [0001] The invention relates to bridge state detection, in particular to a method for railway bridge state monitoring. Background technique [0002] With the advancement of science and technology and the needs of transportation, real-time health monitoring of bridges has received more research and attention. The health status of bridges on the railway line is related to the safety of trains. By continuously monitoring the deformation of bridges, bridge danger warnings and alarms can be realized, which helps prevent train accidents caused by unsafe bridges. In recent years, with the development of high-precision positioning technology, positioning equipment has developed into unattended, continuous operation for many years, and the positioning accuracy can reach millimeter level. This technology has been widely used in the monitoring of dams, bridges, landslides, road subsidence, tailings ponds, and glacier movement. At present, there are many examples of br...

Claims

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Application Information

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IPC IPC(8): G01S19/14G08B21/18
CPCG01S19/14G08B21/182
Inventor曾时
Owner曾时