第一个非轴对称模式的麦克风阵列分析,用于检测管道状况
Yicheng Yu1, Kirill V Horoshenkov1, Simon Tait2
1Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom.
The Journal of the Acoustical Society of America
|January 23, 2024
概括
这项研究引入了一种新的声学反射计技术,使用圆形麦克风阵列精确定位管道缺陷. 该方法准确地确定了堵塞和侧面连接的轴和周长位置.
科学领域:
- 声学 声学 在声学方面
- 信号处理 信号处理
- 非破坏性测试 不破坏性测试
背景情况:
- 传统的声学反射计方法用于管道缺陷定位,仅限于轴向定位.
- 管道缺陷的精确环形定位仍然是检查技术的一个重大挑战.
研究的目的:
- 开发一种增强的声学反射测量技术,用于精确,多维定位管道缺陷.
- 利用非轴对称声学模式的相位信息来改进缺陷检测.
主要方法:
- 采用圆形麦克风阵列来获取数据.
- 将贝叶斯最大后期 (MAP) 算法与模式分解相结合.
- 分析缺陷定位的第一个非轴对称模式的相位信息.
主要成果:
- 成功地将管道缺陷局部化,包括堵塞和侧面连接,准确度高.
- 实现了定位准确度,比轴感应距离的2%更好,并且在9°周长误差范围内.
- 在一个直径为150毫米的PVC管道上验证了该方法,其中有20%的堵塞和100毫米的侧连接.
结论:
- 与现有技术相比,拟议的方法为分析管道缺陷提供了更高的分辨率.
- 精确的轴向和圆周缺陷定位可以通过六个或更少的麦克风实现.
- 该技术适合在自主检查机器人上进行远程实现,以实现高效的管道诊断.
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