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Vibrational Sensor Based on Fluid Damping Mechanisms
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English
Abstract
A piezoelectrically driven vibrating cantilever blade is damped by a number of mechanisms including viscous damping in a still fluid and aerodynamic damping in a flow. By measuring the damping of devices operating at resonance in the 1 to 5 kHz region, one can measure such properties as mass flow, absolute pressure or the product of molecualar mass and viscosity. In the case of the mass flow measurement, the device offers a mechanical alternative to hotwire and hot film devices for the automotive application.
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Citation
Hetrick, R. and Cathey, L., "Vibrational Sensor Based on Fluid Damping Mechanisms," SAE Technical Paper 900489, 1990, https://doi.org/10.4271/900489.Also In
References
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- Hetrick R. E. “New Sensor Concepts Using Vibrating Cantilevers” SAE Paper 880556 1986
- Rocard Y. General Dynamics of Vibrations Frederick Ugar Publishing Co. New York 1960
- Howe R. T. “Resonant Microsensors” Digest Tech. Papers, 4th Int. Conf. Solid-State Sensors and Actuators (Transducers '87) Tokyo June 1987 843
- Landau L. Lifshitz E. Fluid Mechanics Addison - Wesley Reading, MA 1959