液体管道堵塞声波的分析

Voice Wave Analysis of Blockage in Liquid Pipeline

利用声发射技术对液体管道堵塞检测是目前较为有效的手段之一,但在背景噪声较复杂的环境中会出现检测不准确问题。为了提高声波检测的精度,通过对管道堵塞处流场的数值模拟和实验研究,分析了管道发生堵塞后对声场的影响以及检测故障信号特点。结果表明:在研究的几种管道堵塞情况下,随着堵塞面积的增大,声波强度增大,在时域上声波的均方根值呈现平稳的上升趋势,波形指标和脉冲指标呈现平稳的下降的趋势。结论对利用声发射技术检测液体管道堵塞具有一定的参考价值。

Acoustic detection is one of the effective measures to detect liquid pipeline blockage,but there will be accuracy problems when in the complex environment. To improve the accuracy of acoustic detection, through simulation and experimental study of the pipeline blockage in the flow field, analyzes the effect on sound field after the pipeline blockage, characteristics of fault signals. The result shows：in these pipeline blockage cases that studied ,with the increase of the blockage area, the acoustic strength will be higher, root mean square ap- pears upward trend, and wave index and pulse index show downtrend. The results have important sense for the detection that in pipeline blockage.