The Application Of Ultrasonic Flaw Detector Of Seamless Tube Detection Research

The seamless steel tubes drawing using methods such as extrusion or perforation ofthe production,there is no seams on the surface.There are unique advantages comparedwith the pipe,the technical perfoemance and quality standards and production costs ofconsumption make it presents a strong market competitiveness.Seamless steel industrytoday is mainly used to tranport liquids,and widely used in automotive construction ofbridges and aviation industries,so it is quality problems are increasingly attention ofpeople,accurate and efficient ultrasonic testing because no damage characteristics into thehorizon.Firstly,the theoretical basis of ultrasonic testing are introduced.Because of it is manyfeatures ultrasonic propagation in the medium was used for testing.E.g changing itsrefractive scattering diffraction reflection attenuation of the reasonance in the medium candetect an object the size of the surface tissue of internal defects and otherchanges.Commonly used transvers and longitudinal waves duals were studied on thestructure and function,and the clearance ratio on the final choice of the most appropriatetopic duals experiment.Research clearance reflection and transmission of ultrasonic attenuation law,withrelated formulas and testing requirements,after a comparative calculation,the operatingfrequency of the probe to determine the sensitivity of the wafer diameter and otherparameters,to enable it to meet certain requirements and detecting a certain adaptability tothe environment..Then in the housing movement system designed to probearrays.Coverage of the ultrasonic probe so that the maximum,try to avoid the occurrence ofundetected cases.make the most efficient use of resources.Some of the data collectionrequirements have to make in to account the actual detection of multi-channel and highresolution.After clearance of the relevant product market cost for comparison chose thePXI-5105as the subject data acquisition card.Completion of the ultrasonic signalacquisition and processing and functions through software platform design.Some common dangers of seamless steel pipe defects such as cracks stratification,it iscauses and characteristics were analyzed in detail.and gives the common pitfalls of typicaldefects of these waveforms.Sample through cracks and delamination defects,the waveformof the echo signal detected relative ratio,the reliability of the test results were analyzed,finally,test results obtained under laboratory conditions,accurate and reliableconclusions.After passing the sample with a flat bottom hole probe calibration and drawthe TCG curve.Since the object to be detected or the type of coupling agent,or because of thebackground environment,often resulting in many of the significant signal superimposednoise signal in the actual detection process,so the noise signal acquisition processing is alsovery important.This paper analyzes the characteristics of the common noise,and traditionalfiltering methods to be introduced..On this basis,the spectral analysis method introduceswavelet analysis method commonly used filtering method.And because one of theadvantages of the wavelet analysis method is widely used filtering aspects,through itscombination with Fourier transform modulus maxima introduced filtering thresholdfiltering methods,these types of filtering methods in qualiative comparison drawn throughthe most satisfactory solution.Advantages of wavelet domain threshold filtering effect isgood and there is a small amount of computation,so to be the best choice,the rest of themodulus maxima reconstruction filtering and spatial correlation filter is filtering method touse as an auxiliary.Finally,the software platform on the relevant data of the ultrasonicde-noising module design.