| 摘要 |
Method in a stacker crane for weighing a load, which comprises a lifting carriage (6), motor means (2,3,4,9) to lift said carriage (6), a lifting member (7) on which the lifting carriage (6) is suspended and on which the motors means (2,3,4,9) exert a tensile effect for movement of the lifting carriage (6), first sensor means (13) to determine the position of the lifting carriage (6) and generate a first signal (21), control means (20), second sensor means to generate a second signal (17) proportional to the length of the lifting member (7). The elongation of the lifting member (7) is determined that is caused by the load (11), said elongation being proportional to the difference of the first and second signal (17,21), and the weight of the load (11) is determined by means of a calculation algorithm, the stretching length of the lifting member (7) and the predetermined spring constant of the lifting member (7) being taken into account. <IMAGE> |
