Patent ID: 6089102
Filing Date: 2000-07-18
Classification: B67D,G01F,G01P

Abstract:
An apparatus for measuring the volume of flowing media, said apparatus comprising:a housing including at least two partially merging longitudinal bores, the axes of which are parallel;multiple-thread, interengaging screw-spindles, each spindle supported in a freely rotatable manner within said bores;at least one sensor means for responding to the revolutions of one of said screw spindles and providing pulses whose time sequence represents the instantaneous angular speed of said one spindle;pulse interval measuring means for measuring intervals between the pulses supplied by said sensor means;storage means for storing an empirically determined correlation between the flow velocity of the medium flowing through the apparatus and pulse intervals;means for providing different volume values, in each case on the basis of the pulse interval measured by the pulse interval measuring means and on the basis of the correlation between flow velocity and pulse intervals stored in the storage means, the volume value provided being a measure of the volume flowing through the apparatus between pulses; andmeans for adding the values successively provided by said providing means so as to obtain a total volume values which is the decisive value for the volume measurement.