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Analysis Of Attenuation Characteristics Of Ultrasonic Propagation In Mud

Posted on:2015-03-08Degree:MasterType:Thesis
Country:ChinaCandidate:D Y WangFull Text:PDF
GTID:2268330431954279Subject:Measuring and Testing Technology and Instruments
Abstract/Summary:PDF Full Text Request
This research is to analyze the ultrasonic attenuation characteristics of thepropagation of mud. In the industrial measurement technology, ultrasonic testing is theuse of a non volume to be measured (such as density, viscosity, hardness, concentration,temperature, flow rate) and the acoustic properties of some physical quantitydescription of ultrasonic (mainly is the sound velocity, impedance, and attenuation) havedirect or indirect relationship exists between, through the determination of the associatedwith the ultrasonic characteristics of the physical quantity to measure the measured nonvolume. By studying the mud parameters (such as: density, grain size) of the impact ofchanges in attenuation characteristics of its ultrasonic propagation in order to achieve theuse of ultrasonic attenuation to measure these parameters purposes.The main contents of this paper are that for the propagation of ultrasonic attenuationcharacteristics in the mud theoretical studies, including ultrasonic testing methods, thediffusion of ultrasonic attenuation, scattering attenuation and viscous damping. Andusing the MATLAB software for the numerical simulation, numerical simulation ismainly mud particle size, the influence of ultrasonic frequency scattering attenuationcoefficient trends and mud density, mud particle size and frequency of the ultrasonicattenuation coefficient of viscosity influence trends and summarized the theoreticalconclusions. IC chip ultrasonic transducer and ultrasonic transmitting and receivingultrasonic device constitutes a hardware system, designed circuit diagram, drawn into thePCB circuit board, set up to detect different parameters of ultrasound in the mud in theattenuation of the hardware platform, and the hardware circuit debugging. Under thelaboratory conditions, measured and verified the impact of different viscous mud densityof ultrasonic attenuation effects of changes in particle size and mud scattering attenuation.Theoretical results and numerical simulation results the same trend, namely in thematerial is the same, the particle size is roughly the same as in the mud, mud density isgreater, the smaller amplitude of ultrasonic echo, ultrasonic attenuation is more viscous;namely, in different sizes, the same material, the same density of mud, mud the larger particle size, echo amplitude ultrasonic wave is small, then the ultrasonic scatteringattenuation is greater. The results of this study provide a theoretical basis for the furtherapplication of the ultrasonic in the non-volume measurement in.The results of this study further application of ultrasonic sound level measurementsin non provides a theoretical basis for.
Keywords/Search Tags:Ultrasonic inspection, Mud parameters, Scattering attenuation, Viscousdamping
PDF Full Text Request
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