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Active damage monitoring device and method for hydraulic concrete structure

A technology for hydraulic concrete and structural damage, which is applied in processing detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., and can solve problems such as the difficulty of damage sensitive frequencies

Inactive Publication Date: 2013-12-25
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complexity of concrete crack damage, it is very difficult to determine the sensitive frequency of damage

Method used

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  • Active damage monitoring device and method for hydraulic concrete structure
  • Active damage monitoring device and method for hydraulic concrete structure
  • Active damage monitoring device and method for hydraulic concrete structure

Examples

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Embodiment 1

[0034] Embodiment 1: The active monitoring device for hydraulic concrete structure damage of the device of the present invention includes a vibration table 1, a waveform generator 2, a driver 3, a sensor 4, a digital filter 6, a digital collector 5, a wavelet packet analysis system 7 and a measured A hydraulic concrete structure 8; the measured hydraulic concrete structure 8 is set on the vibrating table 1, and after the waveform generator 2 sends a sweep signal to the driver 3, the driver 3 is excited to generate a stress wave, The stress wave propagates in the measured hydraulic concrete structure 8 and is received by the sensor 4, and the stress wave signal passes through the digital filter 6, the digital collector 5 and the wavelet packet analysis system 7 in turn; the driver 3 and the sensor 4 are pressure Electric ceramic smart module, the driver 3 and the sensor 4 are respectively embedded or pasted on the two ends of the hydraulic concrete structure 8 to be tested; the ...

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Abstract

The invention discloses an active damage monitoring device for a hydraulic concrete structure. The device comprises a vibrating table (1), a waveform generator (2), a driver (3), a sensor (4), a digital filter (6), a digital collector (5), a wavelet packet analysis system (7) and a monitored hydraulic concrete structural body (8), wherein the monitored hydraulic concrete structural body (8) is arranged on the vibrating table (1); after the waveform generator (2) sends a swept-frequency signal to the driver (3), the driver (3) is excited to generate stress waves; the stress waves are propagated in the monitored hydraulic concrete structural body (8) and then are received by the sensor (4); stress wave signals sequentially pass through the digital filter (6), the digital collector (5) and the wavelet packet analysis system (7). The testing platform provided by the invention plays an important role in health monitoring of the hydraulic concrete structure and has the advantages of high accuracy, simple arrangement, low monitoring cost, high working efficiency, high engineering applicability and the like.

Description

technical field [0001] The invention relates to an active monitoring device and method for hydraulic concrete structure damage. Background technique [0002] Cracks are the main response to the aging and disease of hydraulic concrete structures, and they are very harmful to concrete structures. It is the most common damage lesion in hydraulic concrete structures. Its occurrence and development are one of the important characteristics of structural function decline. It has an important impact on the adaptability, durability, and bearing capacity of the structure, and may even cause structural damage and accidents. The effective identification of crack damage is an important content of health monitoring and diagnosis of hydraulic concrete structures. The introduction of mature new materials and new technologies is urgently needed to achieve real-time, efficient and accurate monitoring and control of hydraulic concrete structure damage. . [0003] Piezoelectric ceramic sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/44G01N29/04
Inventor 苏怀智张楠杨孟张林海
Owner HOHAI UNIV
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