公开(公告)号：US20200172375A1

公开(公告)日：2020-06-04

申请号：US16623630

申请日：2018-06-01

Applicant: Inventio AG

Inventor： Philippe Henneau ,  Vincent Robibero ,  James Bibby

IPC: B66B5/00

Abstract: A method for self-testing a monitoring device monitoring an integrity status of an elevator suspension member arrangement includes the monitoring device having a voltage generation arrangement for generating electric voltages and applying the electric voltages to cords in suspension members of the suspension member arrangement. The monitoring device has a voltage analyzer arrangement for detecting a deterioration in the integrity status based on modifications in the applied electric voltages upon transmission through the cords. The method includes the steps of: specifically modifying the generated electric voltages to systematically induce modifications in the applied electric voltages upon transmission through the cords which, under normal operation conditions of the monitoring device, would be interpreted by the monitoring device as indicating the deterioration in the integrity status; verifying whether the deterioration in the integrity status is correctly detected; and initiating a self-test-failure-action if the deterioration in the integrity status is not correctly detected.

公开(公告)号：US20190047823A1

公开(公告)日：2019-02-14

申请号：US16077255

申请日：2017-02-02

Applicant: Inventio AG

Inventor： Vincent Robibero ,  Philippe Henneau

IPC: B66B7/12 ,  B66B7/06 ,  G01N27/20

Abstract: A method and device detect non-uniform and uniform deterioration states in an elevator suspension member having first and second groups of electrically conductive cords. First ends of the groups are electrically connected to an alternating voltage generator arrangement and second ends are electrically connected to each other through first and second resistors via a neutral point at which electrical resistances of the groups are the same in a non-deteriorated state of the suspension member. The method includes: applying first and second alternating voltages to the first end of the first and second groups, respectively; determining a neutral point voltage between the neutral point and an electrical reference potential; determining difference voltages between first and second difference measurement points located between the second ends of the groups and the respective resistors; and determining the deterioration state based on both the determined neutral point voltage and the determined difference voltage.