Method for examining corrosion of a steel reinforcement rod embedded in concrete

摘要

The present invention is a method for examining corrosion on a reinforcement steel. A sensor with a fiber Bragg grating is connected with a coupler; and the coupler is connected with a laser and an analyzer. Apply the sensor at a proper position on the reinforcement steel. A light source of the laser goes to the sensor through the coupler; and then the light passes the sensor and is transferred back to the analyzer. The analyzer can then figure out the strain out of the deformation and swell on the reinforcement steel owing to its corrosion by detecting the drift of the Bragg wavelength of the light. By doing so, the present invention obtains high sensitivity, strong corrosion sustainability and electromagnetic jam prevention so that the accuracy of the detection becomes higher and it can be widely applied to examine the corrosion on the reinforcement steel in a long term.