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Quick vibration detection method for bridge structure without traffic interruption

A technology for traffic conditions and bridge structures, applied in vibration testing, testing of machines/structural components, measuring devices, etc., can solve problems such as economic loss and interruption of traffic, and achieve the effect of ensuring safety and solving difficult problems of rapid detection

Inactive Publication Date: 2017-09-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this detection method often needs to interrupt traffic, causing economic losses

Method used

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  • Quick vibration detection method for bridge structure without traffic interruption
  • Quick vibration detection method for bridge structure without traffic interruption
  • Quick vibration detection method for bridge structure without traffic interruption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for rapid vibration detection of a bridge structure without interrupting traffic, as follows: the equipment used has multiple wireless acceleration sensors, multiple sensor wireless acquisition nodes and vehicle-mounted mobile wireless base stations, and multiple wireless acceleration sensors are fixedly installed respectively On the bridge, each sensor wireless acquisition node is connected with multiple wireless acceleration sensor radio signals, the vehicle passes the bridge quickly, and the vehicle-mounted mobile wireless base station receives the wireless acceleration sensor data collected by the sensor wireless acquisition node in the fast moving state. And carry out the following vibration detection steps,

[0034] Step 1: At the sensor wireless acquisition node, convert the collected original data signal x with a length of n into a signal y with a length of m, where m=n

[0035] y=Φx (1)

[0036] Independent and identically distributed elements φ in Φ ...

Embodiment 2

[0052] Here is an example of using this technology to carry out vibration tests on bridges, mainly using wireless acceleration sensors to collect the vertical vibration acceleration signals of the bridge deck. A total of 14 wireless acceleration sensors 1 and two sensor wireless acquisition nodes are arranged on the bridge deck. 2. All arranged on the same straight line on the same side, such as Figure 6-7 shown. Then the wireless sensor data receiving base station is placed in the vehicle, and the data of the wireless nodes and the data loss are obtained under the test vehicle moving speeds of 0km / h, 30km / h and 40km / h respectively. Using the data measured in the static state (0km / h), simulate the measured packet loss rate and packet loss location in the moving state to restore the data and identify the modal parameters. The obtained bridge structure frequency and damping ratio parameters are shown in Table 1. , the mode shape as Figure 8-9 and Figure 10-11 shown.

[00...

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Abstract

The invention provides a quick vibration detection method for a bridge structure without traffic interruption and can realize vibration test on the bridge structure without traffic interruption. Multiple wireless acceleration sensors, multiple sensor wireless acquisition nodes and a vehicle-mounted mobile wireless base station are adopted, wherein the multiple wireless acceleration sensors are fixed and mounted on a bridge, each sensor wireless acquisition node is in radio signal connection with the multiple wireless acceleration sensors, vehicles pass the bridge surface quickly, and the vehicle-mounted mobile wireless base station receives data, acquired by the sensor wireless acquisition nodes, of the wireless acceleration sensors in the quick movement state. After the bridge vibration data are acquired, modal parameters of the bridge structure can be recognized with a modal parameter recognition method. The method can solve the problem of quick detection of urban area bridges and provides technical support for the safety of the bridge structure.

Description

technical field [0001] The invention relates to a method for rapid vibration detection of a bridge structure without interrupting traffic. Background technique [0002] With the development of modern detection technology and communication technology, a bridge structure health monitoring system based on wireless sensor network emerges as the times require, which can well solve the problems faced in the use of wired sensor systems, such as troublesome wiring, difficulty in replacing and installing sensors, etc. Problems can be easily solved. Especially the mobile wireless sensor, it can avoid the problem of blocking traffic in the bridge detection, and save the detection cost. At present, wireless health monitoring of large bridges has become a research hotspot, and more bridge monitoring systems in the future may consider using wireless sensor network systems. After several generations of development of wireless sensor networks, wireless sensor networks are developing towar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/025
Inventor 鲍跃全李惠
Owner HARBIN INST OF TECH
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