A phonon diagnosis system for pipeline defects and its implementation method

Abstract

The invention discloses a pipeline defect phonon diagnosis system and a realization method. The digital phonon diagnosis detection system includes a phonon emission module, a phonon reception module, an oscilloscope, a signal generator, an industrial computer, an acquisition card, and a power supply board device. Wherein, the phonon emitting module includes a phonon emitting probe and a phonon signal transmitting end, and the phonon receiving module includes a phonon receiving probe and a phonon signal receiving end. The modulator of the GFSK modulation mode is integrated on the phonon emission probe, and the signal provided by the signal generator is modulated to 433MHz, which is transmitted to the phonon receiving end through the phonon signal transmitting end acting on the pipeline to be tested, and the phonon receiving probe utilizes demodulation The module uses GFSK to demodulate the signal, and transmits it to the industrial computer equipped with the acquisition card through the data signal line to complete the signal acquisition. The invention can realize the defect detection of the pipeline, save the cost, and has broad application prospects.

Description

technical field [0001] The invention relates to information collection, electromagnetic carrier, solid physics, phonon theory, non-destructive testing, signal processing and other multidisciplinary fields, in particular to a digital phonon diagnosis and detection system, which can be used for defect detection of steel pipelines, especially Crossing the pipeline belongs to the new field of non-destructive testing of special equipment. Background technique [0002] At present, the detection technologies for pipeline defects mainly include external detection and internal detection. The external inspection method is mainly based on manual inspection. For large-scale equipment, the inspection is difficult and the process is complicated, and it is not conducive to discovering internal cracks, slag inclusions, pores and other welding defects in the pipeline, as well as microscopic cracks caused by stress concentration and corrosion. Therefore, regular inspection of the pipeline is...

AI Technical Summary

Problems solved by technology

Non-destructive testing is a non-contact testing technology, which mainly uses the physical or chemical reactions of light, heat, magnetism and electricity in the equipment to obtain the status information of the equipment. The type of defect is sensitive, it is difficult to find defects in the microscopic state of the material, it is not suitable for the detection of all defect types, and the operation cost of comprehensive detection of trenchless pipelines is high, the process is complicated, and the development of material defects cannot be monitored in time, resulting in the occurrence of material defects. The phenomenon of equipment scrapping, resulting in economic losses

For crossing pipelines, such as tunnels, rivers, highways, overhead pipelines and crossing pipelines between two mountains or rivers, the existing non-destructive testing technology is difficult to detect defects

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