Characterization of the Use of Low Frequency Ultrasonic Guided Waves to Detect Fouling Deposition in Pipelines.
Characterization of the Use of Low Frequency Ultrasonic Guided Waves to Detect Fouling Deposition in Pipelines.
复制标题
低频超声波引导波的使用以检测管道中的污染沉积。
DOI：
10.3390/s18072122
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发表时间：
2018-07-02
期刊：
影响因子：
--
通讯作者：
Kanfoud J
中科院分区：
文献类型：
--
作者：
Lais H;Lowe PS;Gan TH;Wrobel LC;Kanfoud J
结垢在结构内的积累是许多行业中众所周知的且成本高昂的问题。积聚取决于结垢结构周围的环境条件。已经进行了许多尝试来检测关键工程结构中的污垢积聚并优化功率超声污垢去除程序的应用，即，流动监测、超声导波和热成像。近年来，使用超声导波已被确定为一种有前途的技术来检测污垢沉积/生长。该技术还具有评估结构健康的能力;这是该行业的附加值。利用超声导波进行结构健康监测已经建立，但利用超声导波进行污垢检测仍处于起步阶段。本研究的重点是表征污垢检测超声导波。一个6.2米长的6英寸的计划40碳钢管已被用来研究（方解石）结垢对超声导波传播的结构内的效果。所考虑的参数包括频率选择、循环次数和污垢厚度增量时的分散。根据所研究的条件下，0.5 dB/m的下降信号幅度发生污垢沉积1毫米。研究结果表明，有可能检测污垢建立在长管道和量化其厚度的幅度减少发现从进一步的数值研究。该变量可用于优化功率超声污垢去除过程。
The accumulation of fouling within a structure is a well-known and costly problem across many industries. The build-up is dependent on the environmental conditions surrounding the fouled structure. Many attempts have been made to detect fouling accumulation in critical engineering structures and to optimize the application of power ultrasonic fouling removal procedures, i.e., flow monitoring, ultrasonic guided waves and thermal imaging. In recent years, the use of ultrasonic guided waves has been identified as a promising technology to detect fouling deposition/growth. This technology also has the capability to assess structural health; an added value to the industry. The use of ultrasonic guided waves for structural health monitoring is established but fouling detection using ultrasonic guided waves is still in its infancy. The present study focuses on the characterization of fouling detection using ultrasonic guided waves. A 6.2-m long 6-inch schedule 40 carbon steel pipe has been used to study the effect of (Calcite) fouling on ultrasonic guided wave propagation within the structure. Parameters considered include frequency selection, number of cycles and dispersion at incremental fouling thickness. According to the studied conditions, a 0.5 dB/m drop in signal amplitude occurs for a fouling deposition of 1 mm. The findings demonstrate the potential to detect fouling build-up in lengthy pipes and to quantify its thickness by the reduction in amplitude found from further numerical investigation. This variable can be exploited to optimize the power ultrasonic fouling removal procedure.
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影响因子：
2.4
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