Resonance-coupling analysis of fluids uses a hollow piezo-electric vibrational body, and the application of two vibrational modes to determine physical properties

摘要

Process and apparatus for determination of physical properties of fluids uses one or more oscillators to apply piezo-electric or magnetic excitation as a test function, to a fluid contained within a hollow vibration body, and the response measured. The test function may be e.g. a pulsed, oscillating, periodic, continuous vibration, Heaviside or Dirac impulse signal. Laser stimulation may be superimposed on the system.