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Bridge structure damage positioning method based on transfer entropy of double sensor information

A bridge structure and damage location technology, which is applied to pattern recognition in signals, instruments, measuring devices, etc., can solve the problems of reducing sensor usage, high cost, and many measuring points, achieving fast calculation, obvious effect, and simple operation Effect

Pending Publication Date: 2018-09-11
JINAN UNIVERSITY
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Problems solved by technology

This method proposes a method that only needs to install two sensors on the bridge to measure the bridge response, and analyze the transfer entropy of the two sensor signals to diagnose and locate the damage of the bridge structure, reduce the use of sensors, and solve the problem of excessive measurement points. Many, costly and other issues

Method used

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  • Bridge structure damage positioning method based on transfer entropy of double sensor information
  • Bridge structure damage positioning method based on transfer entropy of double sensor information
  • Bridge structure damage positioning method based on transfer entropy of double sensor information

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Embodiment

[0034] Such as figure 1 as shown, figure 1 In order to apply the bridge structure damage location method based on the transfer entropy of dual sensor information to carry out the flow chart of bridge damage location, the schematic diagram of the steel girder bridge model used in the embodiment is as follows figure 2 . The model beam length l is 20m, the sampling frequency is 200Hz, and the damage is at 4 / 5 of the beam length. The specific implementation process is as follows:

[0035] S1. Install acceleration sensors a and b at any two different positions on the bridge, and the installation direction is perpendicular to the direction of the bridge deck, such as figure 2 In the illustrated embodiment, the two sensor installation positions are respectively at 1 / 4 and 1 / 2 of the beam length.

[0036] S2. Collect the acceleration response of the vehicle load passing through the bridge, and obtain the acceleration signals a(t) and b(t) of the measuring points of the accelerat...

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Abstract

The invention discloses a bridge structure damage positioning method based on transfer entropy of double sensor information. The method comprises the following steps that two acceleration sensors areinstalled at any two different positions of the bridge in a perpendicular mode; the acceleration response of the vehicle load passing through the bridge is measured, and acceleration signals a (t) andb (t) of the acceleration sensor are obtained respectively; a moving time window is defined; a moving time window is used for carrying out synchronous signal interception on the two measuring point acceleration signals, and the transmission entropy is calculated for two sections of signals in the window, and the time sequence of the damage index transmission entropy Ki is obtained; the damage ofthe beam-type bridge structure can be positioned by transmitting the entropy K curve at the bridge damage position. According to the method, due to the fact that the windowing transfer entropy betweenthe two collected two-column acceleration signals is changed before bridge damage, the beam-type bridge structure damage positioning is carried out, and only two sensors need to be used for measuringthe acceleration data, and then the transfer entropy value is calculated, the damage position of the bridge is positioned, and the number and the cost of the sensor can be reduced.

Description

technical field [0001] The invention relates to the technical field of nondestructive structure detection, in particular to a bridge structure damage location method based on transfer entropy of dual sensor information. Background technique [0002] Structural damage detection is the core of structural safety monitoring system and a challenging research topic in the field of safety monitoring. With the increasing accuracy and Many different types of structural damage detection methods have been developed, such as frequency domain methods, time domain methods, stress methods, etc. [0003] The main parameters concerned in bridge safety monitoring are bridge deformation, static strain, dynamic strain, static strain, acceleration, cable force, temperature and humidity, cable force, wind load and other related data. The frequency domain method based on mode shape and frequency response function requires a lot of measuring points, and the safety monitoring system needs a large n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G01H17/00
CPCG01H17/00G06F2218/14G06F2218/16
Inventor 聂振华杨卫星林隽马宏伟
Owner JINAN UNIVERSITY
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