Remote query fluid-flow velocity measurement using magnetoelastic thick-film sensors (invited)
Remote query fluid-flow velocity measurement using magnetoelastic thick-film sensors (invited)
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DOI：
10.1063/1.372686
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发表时间：
2000-05-01
影响因子：
3.2
通讯作者：
Grimes, CA
中科院分区：
文献类型：
--
作者：
Kouzoudis, D;Grimes, CA
厚膜带状磁致弹性传感器的特征谐振频率取决于其长度、密度、泊松比和弹性模量[J. M. Barandiaran和J. Guitierrez，Sens. Actuators A 59，38（1997）]。以类似于表面声波（SAW）传感器的方式，该特征谐振频率也随着有效质量负载或随着施加到磁致弹性传感器的表面的摩擦力而变化[L. D.朗道和E. M. Lifshitz，弹性理论，第3版（Pergamon，纽约，1986年），第11章。第二部分]。从磁致弹性传感器发出的时变磁通量可以使用拾取线圈远程监测。因此，与SAW器件相比，不需要直接的物理连接来获得磁致弹性传感器信息，从而可以从密封的不透明容器内对其进行监测。本文报道了磁弹性传感器在测量密封管道内流体流量中的应用。在层流流体流动状态内，更大的流体速度导致传感器表面上的摩擦阻力增加，这又降低了磁致弹性传感器的谐振频率。(C)2000年美国物理学会。[S0021-8979（00）19008-5]。
The characteristic resonant frequency of a thick-film ribbon-shaped magnetoelastic sensor is dependent upon its length, density, Poisson's ratio, and modulus of elasticity [J. M. Barandiaran and J. Guitierrez, Sens. Actuators A 59, 38 (1997)]. In a manner analogous to surface acoustic wave (SAW) sensors, this characteristic resonant frequency also changes with effective mass load or with friction force applied to the surface of the magnetoelastic sensor [L. D. Landau and E. M. Lifshitz, Theory of Elasticity, 3rd ed. (Pergamon, New York, 1986), Chap. II]. The time varying magnetic flux emitted from magnetoelastic sensors can be monitored remotely using pickup coils. Hence, in contrast with SAW devices, no direct physical connections are required to obtain magnetoelastic sensor information, allowing them to be monitored from within sealed, opaque containers. Reported here is application of magnetoelastic sensors to the measurement of fluid flow from within sealed pipes. Within the laminar fluid flow regime greater fluid velocity results in increased frictional drag on the surface of the sensor, which in turn lowers the resonant frequency of the magnetoelastic sensor. (C) 2000 American Institute of Physics. [S0021-8979(00)19008-5].