Distributed Temperature Sensors Development Using an Stepped-Helical Ultrasonic Waveguide

被引：1

作者：

Periyannan, Suresh ^{[1
]}

Rajagopal, Prabhu

Balasubramaniam, Krishnan ^{[1
]}

机构：

[1] Indian Inst Technol Madras, Ctr Nondestruct Evaluat, Madras 600036, Tamil Nadu, India

来源：

44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOL 37 | 2018年 / 1949卷

关键词：

Ultrasonic transducer; stepped spring; distributed sensing; high temperature; VISCOSITY;

D O I：

10.1063/1.5031573

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This paper presents the design and development of the distributed ultrasonic waveguide temperature sensors using some stepped-helical structures. Distributed sensing has several applications in various industries (oil, glass, steel) for measurement of physical parameters such as level, temperature, viscosity, etc. This waveguide incorporates a special notch or bend for obtaining ultrasonic wave reflections from the desired locations (Gage-lengths) where local measurements are desired. In this paper, a multi-location measurement wave-guide, with a measurement capability of 18 locations in a single wire, has been fabricated. The distribution of these sensors is both in the axial as well as radial directions using a stepped-helical spring configuration. Also, different high temperature materials have been chosen for the wave-guide. Both lower order axi-symmetric guided ultrasonic modes (L(0,1) and T(0,1)) were employed. These wave modes were generated/received (pulse-echo approach) using conventional longitudinal and shear transducers, respectively. Also, both the wave modes were simultaneously generated/received and compared using shear transducer for developing the distributed helical wave-guide sensors. The effect of dispersion of the wave modes due to curvature effects will also be discussed.

引用

页数：6

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