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Bridge pier crack nondestructive detection device

A detection device and non-damaging technology, which is applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problems of high cost and inconvenient installation of image acquisition equipment, and achieve the effect of improving sensitivity, overcoming micro cracks and insensitivity of closed cracks

Inactive Publication Date: 2015-11-04
WUXI CITY CHONGAN DISTRICT TECH ENTREPRENEURSHIP SERVICE CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the existing technology, most of the health monitoring of bridges adopts the method of image acquisition, and the piers of bridges, such as cross-sea and river-crossing bridges, are mostly immersed in water, so it is inconvenient to install image acquisition equipment, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, set up detection nodes at each bridge pier, and then search for the corresponding natural frequency range according to the material of the bridge pier, and select the appropriate output excitation signal frequency according to this frequency range; the high-frequency output excitation signal selects an ultrasonic signal exceeding 20kHz, and the low-frequency output excitation signal The frequency selection is close to the natural frequency, and the difference or sum of the two excitation signal frequencies is equal to the multiple of the natural frequency of the bridge pier; the signal generator is used to generate two sets of low-frequency and high-frequency excitation signals determined according to the aforementioned method, which are respectively input to the low-frequency excitation On the device and high-frequency exciter, after the bridge pier is applied with low-frequency and high-frequency excitation, the piezoelectric sensor collects the vibration signal...

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PUM

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Abstract

The invention discloses a bridge pier crack nondestructive detection device, and belongs to the nondestructive detection technical field. The device includes a detection node arranged at each pier, a remote monitoring center and a communication module, wherein the remote monitoring center and the detection nodes are in information transmission through the communication module, the detection nodes are each provided with a piezoelectric sensor, a signal generator, a low-frequency vibration exciter, a high-frequency vibration exciter and a signal acquisition system. The device can real-timely detect appearing or non-appearing of cracks of the piers and the cracking degree of the cracks, performs real-time early warning and takes protective measures in time, and avoids bridge collapse accidents from appearing.

Description

technical field [0001] The invention relates to a non-damage detection device for bridge pier cracks, belonging to the technical field of non-damage detection. Background technique [0002] With the development of the economy and the growth of the demand for transportation, many bridges across rivers and seas have been built, and some bridges, such as the Yangtze River Bridge, have been in use for many years. During the use of the bridge, it is constantly eroded by the external environment such as rainwater, wind and sand, and the impact of the vehicle load; with the increase of the service life, the bridge has different degrees of damage. When cracks appear, the service life of the bridge will be reduced. As the crack expands, it shrinks, reducing the safety factor of the bridge, and even causing accidents. Therefore, the structural health and safety monitoring of bridges is particularly important. [0003] The application number is 201110232014.2, and the application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 章隆泉潘琳顾肖红
Owner WUXI CITY CHONGAN DISTRICT TECH ENTREPRENEURSHIP SERVICE CENT
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