Patent ID: 7752894
Filing Date: 2010-07-13
Classification: G01N

Abstract:
1. A method for measuring consistency with a rotating consistency meter, the method comprising chopping a signal transmitted by a source to a receiver with the teeth of a chopper structure as the shafts of the rotating consistency meter rotate, while the lengths of measuring pulses detected by the receiver are proportional to the offset between the chopper teeth in different wheels in accordance with the swivel between the shafts further comprising chopping the signal between the source and receiver with a chopper reference of the chopper structure to form at least one reference pulse independent of the swivel between the shafts, measuring the length of each reference pulse when measuring consistency, determining the change in the length of each reference pulse by comparing the length of the measured reference pulse with a predefined reference pulse length, and correcting the length of at least one measuring pulse according to the change in the length of said at least one reference pulse.