Piezoelectric intelligent aggregate for civil engineering works structure health monitoring

A piezoelectric intelligent aggregate and civil engineering structure technology, which is applied in the direction of material analysis, measuring devices, and analysis materials through electromagnetic means, can solve problems such as damage to the main structure, and achieve the effects of saving money, light weight, and small volume

Inactive Publication Date: 2008-07-09
ANGANG CONSTR CONSORTIUM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the texture of PZT material is relatively brittle. If it is directly embedded in

Method used

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  • Piezoelectric intelligent aggregate for civil engineering works structure health monitoring
  • Piezoelectric intelligent aggregate for civil engineering works structure health monitoring

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Experimental program
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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings.

[0022] As shown in the figure, Figure 1 shows the process of the positive piezoelectric effect. When mechanical deformation is applied to the piezoelectric element, the relative movement of the internal positive and negative charge centers will cause the polarization of the point, resulting in the appearance on both surfaces of the element. The opposite sign of the bound charge, and the charge density is proportional to the external force, this phenomenon is called positive piezoelectric effect. The positive piezoelectric effect reflects the ability of piezoelectric materials to convert mechanical energy into electrical energy. Utilizing the positive piezoelectric effect of the piezoelectric material, it can be made into a sensor (signal receiver); Figure 2 shows the process of the inverse piezoelectric effect, in which a voltage is applied to the upper and lower surfa...

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Abstract

The invention relates to piezoelectric intelligent aggregate used for health monitoring of a civil engineering structure, in particular to a structure health monitoring element. The intelligent aggregate comprises a PZT sheet, a waterproof silica gel layer, a shielded wire, a shielded joint and fine aggregate concrete or a mortar cladding layer, wherein, the fine aggregate concrete or the mortar cladding layer is provided outside the intelligent aggregate, the PZT sheet is positioned inside the intelligent aggregate, the waterproof silica gel layer is applied on the PZT sheet, the PZT sheet is connected with one end of the shielded wire, the other end of the shielded wire is connected with the shielded joint, and the shielded joint is connected with a signal emission and collection system. The invention as the main element for health monitoring of the concrete structure has the advantages of high sensitivity, small size, light weight, large strength, and no influence on the overall mechanical performance of the structure.

Description

technical field [0001] The invention relates to a civil engineering structure health monitoring element, in particular to a piezoelectric intelligent aggregate used for health monitoring of concrete structures. Background technique [0002] Concrete structures generally have a long lifespan and are difficult to replace once constructed. However, the performance of any concrete structure will deteriorate over time, mainly due to factors such as the aging of the material itself, excessive use, overloading, environmental erosion, lack of maintenance and detection methods that cannot meet the requirements. The concrete structure health detection system can diagnose the location and degree of defects (cracks, corrosion, etc.) in a timely manner, so that the structure can be repaired and strengthened in time to ensure the integrity and reliability of the structure. At present, there are many structural damage detection methods used in various concrete structures and their compone...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01B7/16
Inventor 阎石孙威
Owner ANGANG CONSTR CONSORTIUM
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