Piezoelectric ceramic annular sensor for tubular concrete structure health monitoring

Abstract

The invention provides a piezoelectric ceramic annular sensor for tubular concrete structure health monitoring, and belongs to the field of civil engineering structure health monitoring. The piezoelectric ceramic annular sensor comprises piezoelectric ceramic rings, waterproof and anti-electricity coatings, electromagnetic shielding coatings, cement mortar protection layers and wires. The piezoelectric ceramic annular sensor is used for transmitting signals to generate stress waves, the grouting quality of a tubular concrete structure can be monitored through the changes of energy of the received signals, the stripping condition between inner concrete and an overcladding layer can be monitored, and the use performance of the structure is judged. The piezoelectric ceramic annular sensor is suitable for tubular concrete structure construction process monitoring and health monitoring in the service process, the piezoelectric ceramic annular sensor is simple in structure, mass production is easy, the compatibility between the piezoelectric ceramic annular sensor and a concrete material is good, signal excitation and collection in the axial direction and the radial direction can be achieved, high applicability is achieved, and the sensor is provided for the construction process and service process of the tubular concrete structure in engineering.

Description

technical field [0001] The invention relates to a piezoelectric ceramic ring sensor for health monitoring of tubular concrete structures, which is suitable for health monitoring of tubular concrete structures and belongs to the field of health monitoring of civil engineering structures. Background technique [0002] Concrete materials in civil engineering structures are widely used in practical engineering because of their advantages such as high compressive strength, low price and easy pouring and forming. However, the concrete structure itself has disadvantages such as difficult construction quality control and easy cracking, so it is very important to monitor the construction quality and service process of concrete structures. In the concrete structure, tubular concrete mainly includes: steel tube concrete, post-tensioned prestressed channel grouting concrete and other forms. [0003] From the perspective of actual engineering, the main problems in the construction and u...

AI Technical Summary

Problems solved by technology

[0006] In order to make piezoelectric ceramic materials better adapt to different forms of concrete structures, the present invention develops a piezoelectric ceramic ring sensor that can be used in tubular concrete structures, which overcomes the limitations of traditional piezoelectric ceramic sheets and smart aggregates The shortcomings of single-direction excitation and acquisition signals can realize the excitation and acquisition of signals along the axial and radial directions of the piezoelectric ceramic ring sensor, which can be applied to both active health monitoring and passive health monitoring of civil engineering structures

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