Pipeline defect phonon diagnostic system and realization method

Abstract

The invention discloses a pipeline defect phonon diagnostic system and a realization method. The digital phonon diagnostic detection system involves a phonon emission module, a phonon receiving module, an oscilloscope, a signal generator, an industrial computer, an acquisition card and a power supply plate device, wherein the phonon emission module comprises a phonon emission probe and a phonon signal emission end, and the phonon receiving module comprises a phonon receiving probe and a phonon signal receiving end. In the method, a modulator with a GFSK modulation mode is integrated on the phonon emission probe, a signal provided by the signal generator is modulated to 433 MHz, and is acted on a to-be-detected pipeline through the phonon signal emission end to be transmitted to the phononreceiving end, the phonon emission probe utilizes a demodulation module to adopt GFSK to demodulate the signal, the signal is transmitted to the industrial computer with the acquisition card through adata signal line, and signal acquisition is completed. The pipeline defect phonon diagnostic system can realize the defect detection of the pipeline, save the cost, find and locate the defect in time, is a new branch in the field of non-destructive examination, and has a wide application prospect.

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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