Patent ID: 6513365
Filing Date: 2003-02-04
Classification: G01N

Abstract:
A method for measuring physical characteristics or physical properties of liquids comprising:providing an acoustic transfer system having at least one receiver and at least one test section formed from a solid surface made from non-piezo-electric material that is brought at least partly into contact with a liquid to be measured, feeding acoustic wave energy to the test section by a sender, wherein at least part of the acoustic wave energy is made available in the form of at least one Rayleigh wave, propagating the Rayleigh wave on the test section over at least an eighth of its wavelength, passing at least part of the acoustic wave energy leaving the sender through a mode converter at least once on its way to the receiver, and converting the part of the acoustic wave energy passing through the mode converter at least partly from one of a Rayleigh wave and a volume soundwave into the other of a Rayleigh wave and a volume sound wave, and determining from the acoustic wave energy received by the receiver the physical characteristics or physical properties of the liquid to be measured by using changes of at least one parameter of the Rayleigh wave as a basis.