This work is concerned with the development of a signal processing algorithms for checkweighers to realize much higher speed of operation and highly accurate measurement of mass of object during crossing a conveyor belt. Continuous measurement means that the masses of discrete objects on a conveyor belt are determined in sequence. Checkweighers usually have maximum capacities of less than 75kg and achieve measuring rates of 150 packages per minute and more. The output signals from the checkweighers are always contaminated with noises due to vibrations of the conveyor and the object to be measured in motion. In this paper an employed digital filter is of Finite-duration Impulse Response (FIR) type that can be designed under the consideration on the dynamics of the checkweigher. The experimental results on the checkweigher suggest that the filtering algorithms proposed in this paper are effective enough to practical applications.
