| 摘要 |
A method for determining a deterioration state in a suspension member arrangement for an elevator is presented. The suspension member arrangement comprises at least one suspension member (11) comprising a plurality of electrically conductive cords. The method comprising: - counting a number of bending cycles applied to the suspension member (11) using e.g. a counter device (25); - measuring electrical characteristic of the suspension member (11) upon applying an electrical voltage to at least one of the cords comprised in the suspension member (11) using e.g. an electrical measuring device (27); - performing at least one of (a) determining a critical deterioration state upon monitoring both: the counted number of bending cycles applied to the suspension member (11), and the determined electrical characteristic of the suspension member (11); and (b) determining an unexpected deterioration state based on deriving a current actual deterioration state of the suspension member based on the determined electrical characteristic and assuming a currently expected deterioration state based on the counted number of bending cycles and comparing the current actual deterioration state with the currently expected deterioration state; - initiating a defined procedure upon the determining at least one of the critical deterioration state and the unexpected deterioration state. Combining two different criteria for determining a critical or unexpected deterioration state in a suspension member (11) may significantly increase safety of the elevator (1) while allowing, inter alia, for prolonged service life of a suspension member (11). |
