Measuring distance along a wire rope, by steps that include moving the wire rope across a sensor head; counting rotations of a rotary encoder driven by the moving wire rope; detecting a first distance marker crossing the sensor head at a first position of the wire rope; detecting a second distance marker crossing the sensor head at a second position of the wire rope; and establishing calibration parameters for producing a calibrated distance measurement corresponding to any output of the rotary encoder, based at least on correlating a known distance between the first and second distance markers to a counted number of pulses of the rotary encoder between the first and second positions of the wire rope.

A polymer composite wireline cable comprising: a polymeric matrix material; at least one reinforced fiber embedded in the polymeric matrix material; and at least one optical fiber disposed in the polymeric matrix material, the at least one optical fiber having at least one pair of Bragg grating sensors, wherein one of the pair of Bragg grating sensors is configured to experience loading strain and the other of the pair of Bragg grating sensors is configured not to experience loading strain.

A cable (10) includes a cable body (11) that is formed from a plurality of wires (14) that are integrally bundled; and a pair of sockets (12) to which both end portions of the cable body (11) is separately affixed; at least one of the plurality of wires (14) being a fiber-containing wire (16), which is formed by an optical fiber (17) that extends in a cable length direction (D) and that is protected by a protective tube (18); wherein the optical fiber (17) protrudes from the protective tube (18), in the cable length direction, further outside than the socket (12); and each of the pair of sockets (12) is provided with a spool (30) that removably holds the optical fiber (17) and imparts an initial tensile strain to the optical fiber (17).

A belt for an elevator system includes a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers. A metallized coating layer is applied to at least a portion of an outer surface of at least one tension member of the plurality of tension members. The metallized coating has a coating electrical conductivity greater than a tension member electrical conductivity of the at least one tension member. A jacket material at least partially encapsulates the plurality of tension members and the metallized coating layer.

A magnetic detector includes permanent magnets that magnetize a wire rope W in the longitudinal direction, and a search coil that detects a change in the cross sectional area of the wire rope W magnetized by the permanent magnets. The magnetic detector is provided so as to surround a part of the wire rope W. Prior to inspection, the magnetic detector is moved back and forth at least three times across an inspection range of the wire rope W. After the magnetic detector is moved back and forth, the change in the cross sectional area, that is, damage to the wire rope W is inspected by using signals outputted from the search coil.

A method for detecting a deterioration state in an elevator suspension member including electrically conductive cords uses a multiplexing unit (MU) to apply first and second alternating voltages to proximal ends of first and second groups of the cords respectively and connect the proximal end of a third group of the cords to a voltage measurement arrangement connected to a reference potential. Distal ends of the groups are connected together. A first neutral point voltage between the third proximal end and the reference potential is determined. The MU is switched to apply the first alternating voltage to the second proximal end, apply the second alternating voltage to the third proximal end and determine a second neutral point voltage between the first proximal end and the reference potential. The deterioration state of the suspension member arrangement is determined based on the first and second neutral point voltages.

Sensor (1) for monitoring the parameters of rotation around its own axis and vibration of a steel rope (100), comprising a battery (2), indicator means (3) of the state of charge of said battery (2), at least a LED indicator (5), a power unit (7) which supplies the sensor (1), a detection unit (8) of the rotation angles (ϕ, γ) around its own axis (X) and of the vibrations of said steel rope (100), a microprocessor (9) for collection activity and data transmission, said sensor (1) being housed in a portion obtained in the core (110) of the steel rope (100).

The present invention generally relates to the detection of the discard state of high-strength fiber ropes. The invention relates to a device for detecting the discard state of high-strength fiber ropes for various operating conditions, wherein a rope core of the fiber rope is sheathed with a rope sheath which is intended to wear more quickly than the rope core, comprising an optical detection device for detecting the rope surface and/or a load spectrum counter for detecting the load cycles to which the fiber rope is subjected, and on the other hand to a lifting gear such as a crane comprising such a device. According to the invention, there is provided a detection device for detecting the light absorption coefficient and/or the degree of reflection of the rope sheath and an adaptation device for adapting the algorithm, by means of which the discard state is determined, in dependence on the detected light absorption coefficient and/or the detected degree of reflection.

The present invention concerns a rope health monitoring system and a rope for such rope health monitoring system whereby the rope comprises objects which are remotely detectable, readable and programmable identification (ID) tags and whereby the rope monitoring system comprises said rope, at least one ID tag reader device mounted along said predetermined path of the rope, to detect at least the identity and optionally the historic health status and/or at least one physical rope parameters of the individual rope section provided with and identified by the at least one ID tag, at least one ID tag writing device, to write a new health status of the individual rope section to the at least one ID tag, at least one means to measure at least one rope operation parameter, a computing unit provided with data, whereby the computing unit is equipped with an algorithm capable to compute the relative longitudinal positioning of individual sections of the rope and the additional damage or damages suffered by individual sections of the rope, compute and record the new health status of the individual sections of the rope, store the new health status of the individual section of the rope in the corresponding programmable ID tag of the rope.

An anchor rope system for an offshore device for fixing an offshore device to a subsea floor. The anchor rope system includes at least one anchor rope surrounded by at least one sheathing. The anchor rope system includes at least one condition sensor formed by at least one fiber optic cable.