Condition monitoring system for elevator hoisting members

A method for monitoring operating conditions of an elevator hoisting member having one or more pairs of tensile load bearing conductive members, each one of the one or more pairs of tensile load bearing conductive members receiving and transmitting electrical signals indicative of the operating conditions of the elevator hoisting member, the method comprising:

• initiating, by a condition monitoring controller that is communicatively coupled to the one of the one or more pairs of tensile load bearing conductive members, a measurement command to gather a current sample of a continuous electrical signal that travels within the one of the one or more pairs of tensile load bearing conductive members of the elevator hoisting member;
• receiving, by the condition monitoring controller, an actual resistance data from the one of the one or more pairs of tensile load bearing conductive members;
• calculating, by the condition monitoring controller, an adjusted resistance data by subtracting the actual resistance data from a baseline resistance data of the one or more pairs of tensile load bearing conductive members and dividing by the baseline resistance data;
• inputting, by the condition monitoring controller, the adjusted resistance data into a process configured to model the adjusted resistance data into a breaking strength value for the elevator hoisting member;
• receiving, by the condition monitoring controller, the breaking strength value for the elevator hoisting member and determining whether the breaking strength value for the elevator hoisting member is below a predetermined threshold value for a rated breaking load for the elevator hoisting member;
• and
• outputting, by the condition monitoring controller, an alert to an elevator controller to instruct the elevator controller to inhibit movement of the elevator hoisting member when the breaking strength value for the elevator hoisting member is below the predetermined threshold value.

A system for monitoring operating conditions of an elevator hoisting member having one or more pairs of tensile load bearing conductive members of an elevator assembly, the elevator assembly further including an elevator controller, an elevator cab and at least one sheave, the elevator hoisting member having a sleeve enclosing the one or more pairs of tensile load bearing conductive members, the elevator hoisting member extending around the at least one sheave to support the elevator cab, the system comprising:

• a processing device communicatively coupled to the elevator controller;
• and
• a storage medium in communication with the processing device and having one or more programming instructions that, when executed, cause the processing device to:
• initiate a measurement command to gather an actual resistance data of the one or more pairs of tensile load bearing conductive members;
• receive the actual resistance data from the one of the one or more pairs of tensile load bearing conductive members;
• calculate an adjusted resistance data by subtracting the actual resistance data from a baseline resistance data of the one or more pairs of tensile load bearing conductive members and dividing by the baseline resistance data;
• input the adjusted resistance data into a process configured to model the adjusted resistance data into a breaking strength value for the elevator hoisting member;
• receive the breaking strength value for the elevator hoisting member;
• retrieve a predetermined number of historical breaking strength values for the elevator hoisting member;
• formulate an estimated breaking strength value summation for the elevator hoisting member by averaging the breaking strength value for the elevator hoisting member with the predetermined number of historical breaking strength values for the elevator hoisting member;
• and
• determine whether the estimated breaking strength value summation for the elevator hoisting member is below a predetermined threshold value for a rated breaking load of the elevator hoisting member;
• wherein when the estimated breaking strength value summation for the elevator hoisting member is below the predetermined threshold value, output an alert to the elevator controller to inhibit movement of the elevator hoisting member.