An ultrasonic level measuring technique based on radiation dissipation and its industrial application

He, Lelu; Zhou, Yefeng; Huang, Zhengliang; Wang, Jingdai; Yang, Yongrong

doi:10.1016/j.flowmeasinst.2014.09.003

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…The time delay is Usually the position of fault point and the situation of connection are measured with detecting the delay time of reflected signal [8] . Short circuit fault.…”

Section: Fig4 Fdr Analysis Resultsmentioning

confidence: 99%

“…According to the (7), the physical means of α and β as follows: α: Attenuation factor of signal in transmission line; β: Phase velocity (delay) factor of signal in transmission line. Put j According to (8), α is related to frequency. β can be simply represented by β=2π*f/v (v represent the propagate velocity of signal).It is also related to signal frequency.…”

Section: Manufacturing Engineering and Processmentioning

confidence: 99%

“…Transmitted signal in TDR testing Fig.6: Received signal in TDR testing As shown in fig.5 and fig.6, pulse signal can be used as TDR transmission signal. Time-varying signals with certain width such as sine and Gaussian can also be used as TDR transmission signals.Usually the position of fault point and the situation of connection are measured with detecting the delay time of reflected signal[8] . Short circuit fault.…”

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confidence: 99%

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Application of TDR and FDR Techniques in the Intelligent Maintenance of Communication Line

Ren

2012

AMR

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This paper mainly researched the application of TDR and FDR techniques in the intelligent maintenance of communication line. The detection and localization of communication line based on TDR and FDR techniques were detailed analyzed when disconnection fault, short-circuit fault, line bridges and other anomalies happened. Then TDR and FDR techniques were compared for user to select. After actual verification, TDR and FDR techniques can well satisfy the needs of field application. They have great application value.

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“…The time delay is Usually the position of fault point and the situation of connection are measured with detecting the delay time of reflected signal [8] . Short circuit fault.…”

Section: Fig4 Fdr Analysis Resultsmentioning

confidence: 99%

Section: Manufacturing Engineering and Processmentioning

confidence: 99%

mentioning

confidence: 99%

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Application of TDR and FDR Techniques in the Intelligent Maintenance of Communication Line

Ren

2012

AMR

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“…In the fundamental aspects of preparing and testing erosion-resistant coatings, researchers have investigated the erosion behavior of single-layer, multi-layer, gradient, and composite-treated surface coatings [19]. The ZrN coating, prepared using vacuum cathode arc technology by the Beijing Institute of Aeronautical Materials, demonstrates good erosion resistance at a 45 • attack angle [18].…”

Section: Introductionmentioning

confidence: 99%

Erosion Resistance of Casing with Resin and Metallic Coatings in Liquid–Solid Two-Phase Flow

Zhu,

Luo,

Huang

et al. 2024

Processes

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Protective coatings are typically applied to enhance their resistance to corrosion. There is considerable research on the corrosion resistance of coated casings. However, few research studies have focused on the erosion resistance on coated casings. In this work, the erosion resistance of resin- and metallic-coated casings in liquid–solid two-phase fluids were investigated using a self-made erosion facility. The results show that the resin coating tends to peel off the material base in the form of brittle spalling or coating bulge in the high-speed sand-carrying liquid. Both resin and metallic coatings were broken through within 20 min in a liquid–solid two-phase flow environment. Compared to resin coatings, metallic coatings exhibit weaker erosion resistance in similar liquid–solid flow. Through the analysis of experimental results and fitted curves, empirical constants for materials and sand content influencing factors were determined using non-dimensional processing. The erosion prediction model of metallic coatings and resin coatings was established based on the ECRC/Zhang model with the change in flow rate, angle, and sand content. This research contributes to a better understanding of the erosion resistance performance of casings used in oil and gas fields, thereby contributing to potential improvements in their production.

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Experimental study on ultrasonic signal measurement and longitudinal wave transfer in air-CH4 mixture space

Kim

Choi

2019

J Mech Sci Technol

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An ultrasonic level measuring technique based on radiation dissipation and its industrial application

Cited by 7 publications

References 7 publications

Application of TDR and FDR Techniques in the Intelligent Maintenance of Communication Line

Application of TDR and FDR Techniques in the Intelligent Maintenance of Communication Line

Erosion Resistance of Casing with Resin and Metallic Coatings in Liquid–Solid Two-Phase Flow

Experimental study on ultrasonic signal measurement and longitudinal wave transfer in air-CH4 mixture space

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