Patent ID: 6313414
Filing Date: 2001-11-06
Classification: A01D,G01G

Abstract:
A system for measuring an actual weight of a material using a weighing load cell, notwithstanding acceleration or a variable slope experienced by the weighing load cell, the system comprising:a weighing load cell that is capable of generating a first output signal associated with a force applied to the weighing load cell by a material;a reference load cell that is capable of generating a second output signal that is associated with a force applied to the reference load cell by a reference mass, the reference load cell being mechanically related to the weighing load cell such that variation in the slope of the weighing load cell is also experienced by the reference load cell and acceleration experienced by the weighing load cell are also substantially experienced by the reference load cell;a first anti-alias filter that filters the first output signal;second anti-alias filter that filters the second output signal; anda processor for determining the actual weight of the material using:means for evaluating the second output signal to determine a compensation multiplier that is indicative of the effects of said variation in the slope and said acceleration experienced by the reference load cell and also is indicative of the effects of said variation in the slope and said acceleration experienced by the weighing load cell; andmeans for determining the actual weight of the material by multiplying the compensation multiplier with a measured weight of the material that has been obtained by the weighing load cell using the first output signal, thereby compensating for said variable slope and said acceleration experienced by the weighing load cell.