Roadbed and pavement hidden defect detection method and device based on electric sensing skin

Abstract

The invention discloses a roadbed and pavement hidden defect detection method and device based on electric sensing skin, and relates to the field of concrete nondestructive testing. The method comprises the specific steps that composite film electric sensing skin is adopted as a conductive coating of a concrete insulator, and a concrete electrode arrangement device is preset; injecting continuous current into the concrete electrode arrangement device, and collecting voltage data of the concrete electrode arrangement device; and carrying out image reconstruction on the composite film electric sensing skin by using the electrical resistance tomography technology according to the voltage data, obtaining a concrete real-time monitoring image according to the change condition of the conductivity of the composite film electric sensing skin, and observing the hidden defects of the roadbed and the pavement. The concrete electrode can be inserted and is easy to splice, the problem that a conventional resistance analysis imaging nondestructive testing system cannot accurately measure the conductivity change of concrete is solved, and the requirement that hidden defects of a roadbed and a pavement can be observed without damaging the pavement structure is met.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of concrete, and more particularly to a method and device for detecting hidden defects of roadbed and pavement based on electrical sensing skin. Background technique [0002] The degradation of old concrete structures is currently a global problem as it can threaten the structural integrity of buildings, resulting in huge loss of property and life. As a result, many countries have allocated large construction budgets for the repair and maintenance of old structures. In my country's roadbed and pavement engineering, the concealed defects of concrete that cannot be observed with the naked eye in heavy traffic and heavy-loaded sections are often detected by cutting and excavation. Therefore, the accurate assessment of concealed defects is imminent. Electrical resistance tomography (ERT), as an emerging nondestructive testing technology, has the characteristics of low cost, non-invasi...

AI Technical Summary

Problems solved by technology

Since the commonly used ERT non-destructive testing system cannot normally detect the change in the conductivity of concrete as an insulator, a set of

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