Determining load of forklift truck and stacking vehicle

摘要

The load is lifted by a lift cylinder supplied by a hydraulic pump driven by an electric motor, controlled by a computer also contg. a motor current meter. The hydraulic a mechanical constants of the hydraulic lifter, and the electric constants of the electric motor are deposited in the computer memory. The computer computes the wt. of the load from the motor current during each lifting and lowering of the load and the known formulae for the hydraulic pump and electric motor torque, using the measured motor current.