Corrosion on-line monitoring system for reinforced bar in concrete

Abstract

The invention discloses a system for conducting online monitoring of reinforcement corrosion in concrete. The system comprises a plurality of sensing devices and upper monitoring computers which are arranged at each detecting point in the concrete. The input end of the upper monitoring computer is connected with a data conversion circuit. The system is characterized in that the system further comprises sampled signal processing circuits correspondingly connected with the sensing devices at each detecting point. The sensing device comprises a temperature sensor and a combined sensor which can simultaneously detect pH value, CI<-> ion concentration value, open circuit potential, polarization resistance and corrosion rate function. The signal output end of the sampled signal processing circuit is connected with the signal input end of the data conversion circuit. The system can compensate temperature, eliminate detection error, and improve the precision and sensitivity of a detecting device in the detecting process. Furthermore, at the same time of improving the detection precision, the system greatly simplifies the structure of the circuit. In addition, when a failure in one detecting points occurs, the whole monitoring system can still operate normally.

Description

technical field [0001] The invention relates to a protection system for concrete structures, in particular to an online monitoring system for steel bar corrosion in concrete. Background technique [0002] In the past 30 years, the rapid growth of my country's economy has attracted worldwide attention, and the fastest growing and largest investment is infrastructure construction, especially infrastructure construction with civil engineering as the main body. China has become the world's largest construction market. The corrosion and protection of steel bars in reinforced concrete structures is a very important issue, which is of great significance to the sustainable development of the national economy. Statistics from developed countries show that the loss caused by corrosion damage of reinforced concrete structures accounts for 0.8% to 1.6% of the gross output value (GDP) of the national economy. Therefore, it is of great significance to test and analyze the corrosion rate...

AI Technical Summary

Problems solved by technology

However, in the detection of the corrosion rate and corrosion resistance of steel bars in concrete, it is necessary to simultaneously measure pH, Cl - Therefore, different sensors need to be installed, and the positions of each detection point are different and the distances are far away. Therefore, not only the sampling signal processing circuit and wiring structure are complicated, but also the volume of the sampler device is large. Moreover, the entire monitoring system cannot work due to the failure of the sampling signal processing circuit.

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