Preparation method of total stress sensor based on cement-based piezoelectric composite material components

Abstract

The invention discloses a preparation method of a total stress sensor based on cement-based piezoelectric composite material components. The preparation method comprises the following steps: step one,preparing first to third type cement-based piezoelectric composite material components of d15 mode, namely d15 mode components; step two, preparing first to third type cement-based piezoelectric composite material components of d33 mode, namely d33 mode components; step three, using the d15 mode components and the d33 mode components to prepare the total stress sensor, namely comprising the stepof uniformly distributing one d33 mode component and one d15 mode component on every face of three adjacent surfaces of a cement base respectively, wherein the polarization directions of the three d15mode components are vertical to one another, and the polarization directions of the three d33 mode components are also vertical to one another. The total stress sensor prepared in the invention is high in sensitivity, high in frequency band response, good in anti-interference effect and good in compatibility with a concrete structure. The total stress sensor is buried into the interior of the concrete structure or adhered to the surface of the concrete structure, and simultaneously, the total stress of the concrete structure can be measured.

Description

technical field [0001] The invention belongs to the technical field of cement-based piezoelectric composite materials, and in particular relates to a preparation method of a total stress sensor based on cement-based piezoelectric composite material elements. Background technique [0002] In the field of civil engineering, concrete structures are the most widely used civil structures. In the overall life of the concrete structure, the safety and stability of the structure is very important. Therefore, in recent years, more and more attention has been paid to the health monitoring of concrete structures. At present, the sensing elements used in the field of civil engineering are generally mature materials that have been used in other fields, such as optical fibers, piezoelectric ceramics, memory alloys, etc. These materials often have very obvious compatibility problems with concrete, the most important structural material in the field of civil engineering. It cannot reflec...

AI Technical Summary

Problems solved by technology

However, there is currently no effective method that can directly measure the entire stress state inside the concrete structure. If a full-stress sensor that can be directly embedded in the concrete and used for simultaneous measurement of the normal stress and shear stress inside the concrete can be developed, it will be useful for the working state. Stress measurement inside concrete is of great importance

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