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Planar vibratory viscometer, viscometer member, and related method

A technology of vibrating components and viscometers, applied in the field of vibrating meters, can solve problems such as the difficulty of accurately determining viscosity

Pending Publication Date: 2021-07-23
MICRO MOTION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clearly, there are many significant non-linearities that make accurate determination of the viscosity difficult

Method used

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  • Planar vibratory viscometer, viscometer member, and related method
  • Planar vibratory viscometer, viscometer member, and related method
  • Planar vibratory viscometer, viscometer member, and related method

Examples

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Embodiment Construction

[0049] Figure 1 to Figure 8 The and following descriptions depict specific examples to teach those skilled in the art how to make and use the best mode of the invention. For the purpose of teaching inventive principles, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations from these examples that fall within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. As a result, the invention is not limited to the specific examples described below, but only by the claims and their equivalents.

[0050] In embodiments, methods and apparatus are provided for determining the viscosity of a gas using a mechanical resonator.

[0051] It was noted above that undesired resonances can disturb the resonance of the vibrating element, leading to increased damping, which affects the accuracy of the calculate...

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PUM

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Abstract

A viscometer (700) is provided, for determining a viscosity of a gas therein. The viscometer (700) comprises a driver (704) and a planar vibratory member (500, 600) vibratable by the driver (704), that comprises a body (502) and a vibratable portion (504) emanating from the body (502), wherein the vibratable portion (504) comprises a plurality of vibratable cantilevered projections. At least one pickoff sensor (706) is configured to detect vibrations of the vibratory member (500, 600). Meter electronics (900) comprise an interface (901) configured to send an excitation signal to the driver (704) and to receive a vibrational response from the at least one pickoff sensor (706), measure a Q and resonant frequency of the planar vibratory member (500, 600), and to determine a viscosity (923) of the gas therein using the measured Q and the measured resonant frequency.

Description

technical field [0001] The present invention relates to vibrating meters, and more particularly to methods and apparatus for measuring viscosity using planar members. Background technique [0002] Viscosity is a fluid property that describes resistance to flow. The usual definition of viscosity is a measure of the internal friction of a fluid. In particular, this internal friction becomes apparent when moving one layer of fluid relative to another. Thus, viscosity is often described as the resistance experienced by one part of a material to move over another part of that material. Viscosity is commonly used to characterize petroleum fluids, such as fuels, oils, and lubricants, and these petroleum fluids are often specified in the trade and classification of petroleum products. For example, the kinematic viscosity of petroleum products is typically measured with a capillary viscometer by standard methods, such as the method described by the American Society for Testing and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00
CPCG01N2009/006G01N9/002G01N11/16
Inventor 乔治·亚历山大·麦克唐纳
Owner MICRO MOTION INC
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