MEASURING AND CONTROL DEVICE FOR LOADS SUSPENDED FROM CABLES, IN PARTICULAR FOR LIFTING STAGE SETTINGS

摘要

1. A measuring and control device for loads suspended from cables, in particular for lifting stage settings, comprising a winding drum, first measuring means for detecting the angular position and/or the rotational speed of the winding drum, a motor for driving the winding drum, second measuring means (21...24) for scanning optical marks (11...14) provided on the cable (10), an analyzer (30) for comparing the measured results from both measuring means, and a control unit for controlling the motor in response to predetermined set-point values of paid-out cable length and the measured actually paid-out cable length, characterized in that the second measuring means includes a plurality of optical sensors, (21...24), the spacing (1+n DELTA l) between said sensors being selected such that not more than two sensors will simultaneously detect a cable mark (11).