Concrete corrosion state detection system and detection method

Abstract

The invention discloses a concrete corrosion state detection system which is characterized in that the system comprises a control detection module, an optical module and a cavity module; the control detection module comprises an oscilloscope, a photoelectric detector, a laser energy meter, a computer and a spectrograph; the oscilloscope is connected with the photoelectric detector and used for monitoring output signals of a laser, and the laser energy meter is used for monitoring actual energy of laser light output by the laser; the optical module comprises the laser, a first spectroscope usedfor transmitting part of the laser light into the photoelectric detector, a second spectroscope used for transmitting part of the laser light into the laser energy meter, a reflector, a first plano-convex lens, a dichroscope, a second plano-convex lens and a collecting optical fiber; the first plano-convex lens and the second plano-convex lens are located on the two sides of the dichroscope respectively; and the cavity module comprises a closed air chamber and an optical window arranged on the closed air chamber.

Description

technical field [0001] The invention belongs to the technical field of laser diagnosis, and in particular relates to a LIBS detection system for detecting the corrosion state of concrete and a method for detecting the corrosion state of concrete by using the detection system. Background technique [0002] During the operation of nuclear power plants, the corrosion of concrete structures has become a key factor affecting the safe and stable operation of each power plant. All commercial nuclear power plants in my country are built on the seashore, while the chloride ion (Cl - ) will have a strong erosive effect on the concrete structure, causing the corrosion of the reinforced concrete inside the structure, causing the concrete to crack and destroying the structural stability, and once the structure is damaged, it will cause foreign matter to enter the pipeline and cause equipment damage. The reduction of the circulating water supply capacity brings great risks to the safe op...

AI Technical Summary

Problems solved by technology

[0004] For the high radioactive environment of nuclear power plants, conventional detection methods, such as X-ray photography technology, ultrasonic technology, and eddy current technology, can only be used in shutdown and non-operation stages, and cannot achieve long-distance online measurement

Recently developed new remote on-line detection technologies include acoustic emission technology and electrochemical technology, both of which have their own limitations: for example, acoustic emission technology can only detect the pressure wave signal emitted by the material being damaged, and cannot evaluate its life and Forecasting; electrochemical technology needs to add small-amplitude electrical signal disturbance to the nuclear power system, which may cause adverse effects on the system

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