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US08166801B2 Non-invasive fluid density and viscosity measurement 有权
非侵入性流体密度和粘度测量

Non-invasive fluid density and viscosity measurement
Abstract:
The noninvasively measurement of the density and viscosity of static or flowing fluids in a section of pipe such that the pipe performs as the sensing apparatus, is described. Measurement of a suitable structural vibration resonance frequency of the pipe and the width of this resonance permits the density and viscosity to be determined, respectively. The viscosity may also be measured by monitoring the decay in time of a vibration resonance in the pipe.
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