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

Abstract

The invention discloses an implantable concrete member damage monitoring device and method based on circumferential knocking, the implantable concrete member damage monitoring device comprises a metal shell, a PZT sensor, a circumferential knocking assembly and a main control module, and the circumferential knocking assembly comprises a rotary base, an electromagnet, an elastic part and a limiting part; a coil of the electromagnet is fixedly arranged on the steering base, a soft iron core of the electromagnet is movably sleeved with the coil, the two ends of the soft iron core axially protrude out of the coil, an abutting part is fixedly arranged at one end of the soft iron core, the other end of the soft iron core faces the inner wall of the metal shell in the radial direction of the metal shell, and the elastic part is arranged between the abutting part and the coil. According to the invention, an implantable design architecture is adopted to integrate an excitation source and a signal monitoring component, maintenance and replacement are facilitated, stability and large energy of signals can be ensured, the monitoring effect on concrete construction damage is more accurate, and electromagnet knocking has multiple directionality and a wider monitoring range.

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 circular 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 proposed...

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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