Broken wire detection method of PCCP (Prestressed Concrete Cylinder Pipe) steel wire

Abstract

The invention provides a broken wire detection method of a PCCP (Prestressed Concrete Cylinder Pipe) steel wire. The broken wire detection method comprises the following steps: S1: a detection vehicle is automatically or manually controlled to move forwards, and in a movement process, displacement changing condition is recorded and detected by a measurement device; an alternating current signal generated by a main engine is continuously received by an emission probe and a corresponding electromagnetic wave signal is transmitted so that a vortex signal is induced on a PCCP wall; meanwhile, the alternating current signal is uploaded to a main control computer by the main engine; a receiving probe continuously responds the vortex signal to generate a voltage signal; S2: when the situation that the detection vehicle does not reach a preset position is detected, the step S1 is repeated; when the situation that the detection vehicle reaches the preset position is detected, the detection vehicle stops moving and a data acquisition card is triggered; the data acquisition card is used for acquiring the voltage signal in the receiving probe and uploading the voltage signal into the main control computer to be used for displaying, storing and carrying out fault judgment; and S3: the detection vehicle moves forwards again and the step S1 and the step S2 are repeated until the detection of a needed pipe section is finished.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a method for detecting broken wires of PCCP steel wires. Background technique [0002] PCCP pipe (Prestressed Concrete Cylinder Pipe) is the abbreviation of prestressed concrete pipe with steel cylinder. It is a large-diameter and high-pressure pipe widely used in the world. Prestressed steel wire (diameter) and cement mortar protective layer outside the steel wire, such as figure 1 shown. The two ends of the pipe are respectively welded with a steel socket ring and a socket ring, and the flexible joint of the pipe is sealed with a sliding rubber ring. In the working state, the thin steel cylinder embedded in the pipe wall has anti-seepage function, and the prestressed steel wire wound outside the pipe core and the concrete wall of the pipe core bear the internal water pressure and external load of the pipe, so the PCCP pipe is a A pipe type that combines the advantages of steel pipes ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is how to extract the required far-field eddy current signal from the strong noise

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