Implantable concrete member damage monitoring device and method based on directional knocking

Abstract

The invention discloses an implantable concrete member damage monitoring device and method based on directional knocking. The implantable concrete member damage monitoring device comprises a metal shell, a PZT sensor, a directional knocking assembly and a main control module, wherein the PZT sensor, the directional knocking assembly and the main control module are all arranged in the metal shell, and the directional knocking assembly comprises an electromagnet, an elastic component and an impact component; a soft iron core of the electromagnet is fixedly arranged in the metal shell, one end of the electromagnet protrudes and abuts against the inner wall of the metal shell, a coil of the electromagnet movably sleeves the soft iron core, the impact component fixedly sleeves one end, abutting against the inner wall of the metal shell, of the soft iron core, and the elastic component sleeves between the coil and the impact component. The excitation source and the signal monitoring component are integrally designed together by adopting an implantable design framework, so that the maintenance and replacement are convenient, the signal stability is good, the signal energy is large, the transmission distance is long, and the monitoring effect on the damage of the concrete structure is more accurate.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to an implantable concrete component damage monitoring device and method based on directional knocking. Background technique [0002] Concrete structures are widely used in the construction of large-scale civil engineering and municipal public infrastructure projects. During its service, concrete materials are prone to crack damage due to continuous loads and alternating changes in ambient temperature and humidity. The development of the working state with cracks will reduce the bearing capacity of the concrete structure and cause safety hazards. Therefore, real-time acquisition of various performance parameters of concrete structures during service can help realize early warning of structural damage, thereby ensuring the safety of the structure in service. [0003] For the damage monitoring of concrete one-dimensional components, many researchers have propo...

AI Technical Summary

Problems solved by technology

The detection equipment of this type of method is large in size and cannot be used as a real-time monitoring system, and the damaged PZT module cannot be repaired or replaced

In addition, the energy of the signal source excited by PZT is small and the signal-to-noise ratio of the signal identified by the PZT sensing module is low

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