Patent ID: 6062070
Filing Date: 2000-05-16
Classification: G01F,G01N,G01S,Y10S

Abstract:
A compensation method for use in connection with level measurement in a medium, wherein acoustic echoes are generated when acoustic energy transmitted into the medium encounters impedance mismatches caused by density changes of the medium, the method comprising the steps of:a) receiving the echoes and converting the same to electrical representations having magnitudes indicative of amplitudes of the echoes;b) adjusting the magnitudes of the electrical representations according to a first function that is inversely related to attenuation of acoustic energy occurring during travel of the acoustic energy through the medium; and,c) further adjusting at least selected ones of the adjusted magnitudes obtained in step (b) according to a second function that compensates one of the adjusted magnitudes under consideration for attenuation of acoustic energy caused by acoustic energy reflected in generating previous echoes.