Electromagnetic induction device and method for quantitatively characterizing degree of corrosion of steel bar in concrete

Abstract

The invention discloses an electromagnetic induction device and method for quantitatively characterizing the degree of corrosion of a steel bar in concrete. The device comprises a Hall effect sensor,an AC power supply, a voltage acquisition system, a signal transmission system and a data analysis system; the AC power supply is connected with a spiral coil, and a to-be-detected portion of the steel bar in the concrete is disposed in the spiral coil, so that a magnetic field can be generated around; the Hall effect sensor is attached to the surface of the to-be-detected portion of the steel barto convert the change of the magnetic field, caused by the corrosion of the steel bar, into the change of an electric field; the Hall effect sensor, the voltage acquisition system, the signal transmission system and the data analysis system are sequentially connected. The electromagnetic induction device and method can carry out long-term comprehensive monitoring on corrosion damage information of steel bars in different reinforced concrete members through the voltage change fed back by the Hall effect sensor, the monitoring is not affected by the manual operation and the environment, and theresult is true and reliable. The electromagnetic induction device and method provide an effective evaluation standard for structural safety of the different types of reinforced concrete members.

Description

Technical field [0001] The invention relates to the safety monitoring of reinforced concrete buildings, in particular to a high-efficiency, stable, long-term and stable corrosion rate monitoring device for reinforced concrete components and a method for characterizing the corrosion degree of steel bars in concrete. Background technique [0002] Reinforced concrete structure makes full use of the advantages of steel and concrete. It has the advantages of convenient materials, economical application, convenient forming, ductile failure, water and fire resistance, etc., so it has been widely used in civil engineering, construction, water conservancy and other projects. With the continuous development of civil engineering, construction, water conservancy and other related industries, the safety and stability of reinforced concrete buildings have attracted more and more attention. Among the many factors that affect the durability of concrete structures, the cracking of concrete struct...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a long-term and effective method for quantitatively analyzing the corrosion rate of steel bars in view of the defects that the existing widely used acoustic emission technology, half-cell potential technology and current coupling method can only qualitatively analyze the corrosion rate. devices and methods

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