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Stacked piezoelectric smart aggregate for health monitoring of concrete structure

A piezoelectric intelligent aggregate and concrete structure technology, which is applied in the direction of material analysis, measurement device, and material analysis using sonic/ultrasonic/infrasonic waves, which can solve the problems of small monitoring area and falling of sensors, and achieve convenient production and installation. The effect of cheap materials, large market and application prospects

Pending Publication Date: 2017-05-31
DALIAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

However, the stress wave attenuates extremely fast in the concrete material, and the degree of attenuation shows an exponential downward trend as the frequency of the emitted stress wave increases, resulting in a small monitoring area between sensors

Method used

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  • Stacked piezoelectric smart aggregate for health monitoring of concrete structure
  • Stacked piezoelectric smart aggregate for health monitoring of concrete structure
  • Stacked piezoelectric smart aggregate for health monitoring of concrete structure

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specific Embodiment approach

[0024] The present invention provides a stacked piezoelectric intelligent aggregate for concrete structure health monitoring, which can realize structural health monitoring of internal cracks, holes and other damages in reinforced concrete structures. The specific implementation manners are as follows:

[0025] In order to ensure that the upper and lower poles of the d33 piezoelectric ceramic sheet 1 have good electrical insulation and a good charge output effect, first use acetone to clean the surface electrodes of the d33 piezoelectric ceramic sheet 1 to remove the surface oil and oxide film; After drying, weld the branched opposite electrode of the interdigitated electrode 2 to the upper and lower surfaces of each arranged d33 piezoelectric ceramic sheet 1 to ensure that the opposite electrode polarity of the two adjacent d33 piezoelectric ceramic sheets 1 is the same, that is, branch Electrodes of the opposite sex are arranged crosswise; use high-strength epoxy resin to fill t...

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Abstract

The invention provides a stacked piezoelectric smart aggregate for health monitoring of a concrete structure and belongs to the field of civil engineering. The stacked piezoelectric smart aggregate comprises d33-type piezoelectric ceramic discs, an interdigitated electrode, high-toughness epoxy resin filling protection layers, a barrier coating layer, a marble protection shell, a low-noise shielded cable and a snap-fit connector. According to the stacked piezoelectric smart aggregate, the characteristics of electric parallel connection and mechanical serial connection of a piezoelectric stack consisting of the d33-type piezoelectric ceramic discs and the interdigitated electrode are fully utilized, and the output deformation is reduced under the condition of the same voltage input. The outer sleeve (the marble protection shell) subjected to surface roughening treatment has good compatibility with a concrete material and can serve as the aggregate to reduce influences on a tested structure by a sensor. The stacked piezoelectric smart aggregate is cheap in material, simple in structure and convenient to mount, and a simple, convenient and feasible method is provided for health monitoring of the reinforced concrete structure.

Description

Technical field [0001] The invention relates to a stacked piezoelectric intelligent aggregate for health monitoring of concrete structures, which is suitable for the inspection of internal cracks, holes and other damages in reinforced concrete structures, and belongs to the field of civil engineering. Background technique [0002] With the continuous economic growth and the continuous advancement of technology, people's demand for large and complex engineering structures is increasing day by day. However, in the process of long-term service of reinforced concrete structures, due to material aging, load effects, fatigue effects and many other unfavorable factors, it will inevitably lead to cracks, holes and other forms of damage inside the structure. If not found in time, it may cause catastrophic damage. Accidents. [0003] Piezoelectric ceramic material has both positive piezoelectric effect and inverse piezoelectric effect. It can be used as a driver and sensor at the same time....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/24
CPCG01N29/043G01N29/245G01N2291/0289G01N2291/0232
Inventor 李宏男高伟航宋钢兵霍林生
Owner DALIAN UNIV OF TECH
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