Transducer for the measurement of attributes of flowable media
OwnerJohn G. Gallagherinventor
Life of this patent
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Abstract
A transducer measures density, viscosity, flowrate or suchlike of fluids or flowable solids using a resonator having two vibratile beam elements, one of which is disposed coaxially within the other. The outer element may be a closed tube which forms a chamber around the inner element. A drive and sensor may be disposed on a base which provides a common root for the beam elements.
Claims20
Apparatus for the measurement of attributes of flowable media including a resonator comprising:
- a first and a second vibratile cantilever beam element, each extending from a common root and forming a vibrating system with a natural frequency dependent on the mass and stiffness of said first and second vibratile cantilever beam elements;
- the torque moments of said first and second vibratile cantilever beam elements on said common root being practically equal;
- said first vibratile cantilever beam element including a tube defining a chamber;
- and
- said second vibratile cantilever beam element being disposed within said chamber.
Apparatus for the measurement of attributes of flowable media including a resonator comprising:
- first and second vibratile cantilever beam elements having a common root and forming a vibrating system with a natural frequency dependent on the mass and stiffness of said first and second vibratile cantilever beam elements;
- the torque moments of the first and second vibratile cantilever beam elements on the common root being practically equal;
- and
- said first and second cantilever beam elements being an outer element in the form of a tube and an inner element in the form of a solid tine disposed within the outer element.
Apparatus for the measurement of attributes of flowable media including a resonator comprising:
- first and second vibratile cantilever beam elements having a common root;
- said first vibratile cantilever beam element being a tube defining a chamber around said second vibratile cantilever beam inner element;
- and
- a transducer disposed on the said common root for inducing vibration of said first and second vibratile cantilever beam elements.
A resonator for measuring the attributes of flowable media disposed thereabout, said resonator comprising:
- a base;
- a first vibratory element affixed at one end to said base;
- a second vibratory element also affixed at one end to said base;
- said first vibratory element being disposed within said second vibratory element without contact.
Dependencies are inferred from the claim text.