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Shear stress sensor based on 1-3 type cement-based piezoelectric composites and preparation method thereof

A piezoelectric composite material, cement substrate technology, applied in material selection for piezoelectric devices or electrostrictive devices, fabrication/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices Telescopic device and other directions to achieve high sensitivity, good coupling effect, and good anti-interference effect.

Inactive Publication Date: 2018-02-16
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no effective means to directly measure the internal shear stress (ie, shear wave) of concrete structures.

Method used

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  • Shear stress sensor based on 1-3 type cement-based piezoelectric composites and preparation method thereof
  • Shear stress sensor based on 1-3 type cement-based piezoelectric composites and preparation method thereof
  • Shear stress sensor based on 1-3 type cement-based piezoelectric composites and preparation method thereof

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Embodiment Construction

[0039] In order to more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings and obtain other implementation.

[0040] See figure 1 , in this specific embodiment, the 1-3 type cement-based piezoelectric composite material element is prepared by cutting-casting method, the main raw materials include piezoelectric ceramic block and cement substrate, and the specific process is as follows:

[0041] (101) Remove the polarized electrode 2 of the polarized piezoelectric ceramic block 1 , and place the piezoelectric ceramic block 1 on the base 3 . The piezoelectric ceramic block may be lead zirconate titanate piezoelec...

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Abstract

The invention discloses a shear stress sensor based on 1-3 type cement-based piezoelectric composites and a preparation method thereof. The shear stress sensor comprises a 1-3 type cement-based piezoelectric composite component; and a packaging layer and a shielding layer with which the 1-3 type cement-based piezoelectric composite component is wrapped in sequence. Positive and negative electrodesof the 1-3 type cement-based piezoelectric composite component are led out of the shielding layer through a wire to be connected with a shielding wire. The shielding wire is connected with the shielding layer. The component comprises a cement-based piezoelectric composite body and an electrode. The cement-based piezoelectric composite body is composed of a piezoelectric ceramic column array formed by piezoelectric ceramic columns and a cement base material filled among the piezoelectric ceramic columns. The piezoelectric ceramic column array is obtained by cutting a polarized piezoelectric ceramic block with the cutting direction perpendicular to the polarization direction of the piezoelectric ceramic block. The sensor of the invention has the advantages of high sensitivity, wide frequency response, good anti-interference effect and good compatibility with a concrete structure, and can be used for the health monitoring of the concrete structure.

Description

technical field [0001] The invention belongs to the technical field of cement-based piezoelectric composite materials, and in particular relates to a shear stress sensor based on 1-3 type cement-based piezoelectric composite materials and a preparation method. Background technique [0002] Cement-based piezoelectric composite material is a new type of functional material developed in recent years. It has the characteristics of good piezoelectric performance, outstanding electromechanical coupling performance, and good matching with concrete material mechanics and acoustic properties. It is used in the health monitoring of civil engineering structures. has potential application prospects. [0003] The currently developed cement-based piezoelectric composite sensor overcomes the problem of incompatibility between traditional sensors and concrete structures. It has high sensitivity and good durability, and can be used to monitor the internal stress and strain of concrete struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/053H01L41/18H01L41/23H01L41/37H10N30/88H10N30/02H10N30/092H10N30/85
CPCH10N30/883H10N30/852H10N30/02H10N30/092
Inventor 李应卫姜清辉马永力丁绍华
Owner WUHAN UNIV
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