Apparatus for testing aramid fiber elevator cables

B - Operations – Transporting – 66 – B

Patent

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B66B 7/12 (2006.01)

Patent

CA 2538128

An apparatus and method for inspecting and calculating the residual strength of an aramid fiber rope (7) driving an elevator to determine when such rope (7) is in need of replacement. The apparatus comprises a transmitter (22) for introducing an acoustic wave that will travel along the aramid fiber rope and a plurality of receivers (24, 26) for receiving the acoustic wave after its has traversed a designated section of the rope. The transmitter and receiver provide signals indicating the times the wave was sent by the transmitter and thereafter received by the receiver. From these signals, a program calculates the wave velocity, and the modulus and residual strength of the aramid rope.

L'invention concerne un appareil et un procédé pour contrôler et calculer la résistance résiduelle d'un câble (7) en fibres aramides entraînant un ascenseur afin de déterminer si ce câble (7) doit être remplacé. L'appareil selon l'invention comprend un émetteur (22) servant à introduire une onde acoustique se propageant le long du câble en fibres aramides, ainsi qu'une pluralité de récepteurs (24, 26) assurant la réception de l'onde acoustique après que celle-ci a traversé une section désignée du câble. L'émetteur et le récepteur fournissent des signaux indiquant les heures auxquelles l'onde a été transmise par l'émetteur, puis reçue par le récepteur. A partir de ces signaux, un programme calcule la vitesse de l'onde, ainsi que le module et la résistance résiduelle du câble en fibres aramides.

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