Non-contact multipoint high-frequency dynamic bridge deflection detection method

A high-frequency dynamic, bridge deflection technology, applied in measuring devices, instruments, optical devices, etc., can solve the problem that bridge deflection is difficult to detect accurately in real time

Active Publication Date: 2016-02-03
CHANGAN UNIV
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  • Claims
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Problems solved by technology

[0004] In view of the deficiencies in the existing technology, the purpose of the present invention is to provide a non-contact multi-point high-freq

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  • Non-contact multipoint high-frequency dynamic bridge deflection detection method
  • Non-contact multipoint high-frequency dynamic bridge deflection detection method
  • Non-contact multipoint high-frequency dynamic bridge deflection detection method

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[0062] Examples:

[0063] This embodiment provides a non-contact multi-point high-frequency dynamic bridge deflection detection method, such as figure 1 with figure 2 As shown, the method adopts the following bridge deflection detection system, which is composed of a laser rangefinder 1, a reflective target 2, a communication module 3, a remote monitoring module 4, and a tilt angle monitor 5. There are n laser rangefinders, which are fixed under the beam of the bridge to be measured; the reflective target is fixed at the piers at both ends of the bridge to be measured. The laser rangefinder and the reflector are equipped with inclination monitors. The reflective target includes a support arm and a reflective plate, and the reflective plate faces the laser rangefinder for reflecting laser light. After the remote monitoring module sends a command, n laser rangefinders irradiate the reflective target at the same time, and the communication module is connected to the laser rangefin...

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Abstract

The invention provides a non-contact multipoint high-frequency dynamic bridge deflection detection method. N laser range finders are arranged below the bridge; a reflection target is arranged at a pier; when the bridge does not suffer from additional load, the laser range finder is opened, a distance L1 of each laser range finder when the bridge does not suffer from additional load is measured, and deflection yi at the bridge position corresponding to each laser range finder is calculated; within a certain measurement range, the n laser range finders are repeated at a time interval of mu second, one end point of the bridge serves as a coordinate origin O, the longitudinal direction of the bridge is X axis, the downward direction perpendicular to the bridge surface is Y axis, an X-coordinate xi of a detection point and the deflection value yi measured in real time are inputted, and integrated coordinate data are fitted to a deflection curve. Non-contact measurement can be realized, and compared with the traditional mode of manually using a dial indicator for detection, remote operation and control can be realized, automation can be realized, and the measurement is more convenient.

Description

technical field [0001] The invention belongs to the field of bridge monitoring and relates to bridge deflection detection, in particular to a non-contact multi-point high-frequency dynamic bridge deflection detection method. Background technique [0002] Transportation is the artery of the economy. For the safety and development of bridge construction, bridge monitoring is essential. The deflection of the bridge refers to the magnitude of the longitudinal line displacement of the centroid at a certain cross section of the beam body in the direction perpendicular to the axis. Once the deflection of the bridge exceeds the allowable range, or the bridge cannot return to its original position after being subjected to external forces, it can be judged that the bridge has potential safety hazards. Therefore, the deflection change is a common measurement parameter to detect the health and operation status of large bridges, and it is a necessary factor to be considered in the bridg...

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Application Information

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IPC IPC(8): G01B11/16
Inventor 韩毅薛诺诺冯彬杨燕雨王文宇
Owner CHANGAN UNIV
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