A rope, a system and a method for measuring one or more properties of a rope. A property evaluation system for ropes can be deployed for a number of different applications including, but not limited to, moving lines, e.g., crane or winch and static lines, e.g., mooring lines, stays, etc., to evaluate physical properties of the ropes and, in some cases, to help evaluate structural health of the ropes. A sheave assembly (10) may transmit a signal into a rope (14) to measure at least one property of the rope. At least one sensor (25) may be coupled to or assembled in the rope to measure at least one property of the rope.

The invention relates to a method for monitoring condition of a rope of a hoisting device, which rope comprises one or more load bearing members oriented to extend parallel with longitudinal direction of the rope throughout the length thereof. The method comprises measuring strains of one or more portions of a load bearing member of the rope; and comparing the measured strains of one or more portions of a load bearing member of the rope with at least one reference. The invention also relates to a hoisting device implementing the method.

A method for determining a deterioration state in a suspension member arrangement having a suspension member including a plurality of electrically conductive cords includes the steps of: counting a number of bending cycles applied to the suspension member; measuring an electrical characteristic of the suspension member upon applying an electrical voltage to at least one of the cords; performing at least one of (a) determining a critical deterioration state upon monitoring both the bending cycles number and the electrical characteristic, and (b) determining an unexpected deterioration state based on deriving a current actual deterioration state of the suspension member based on the electrical characteristic and assuming a currently expected deterioration state based on the bending cycles number and comparing the current actual deterioration state with the currently expected deterioration state; initiating a defined procedure upon determining at least one of the critical deterioration state and the unexpected deterioration state.

Methods and devices detect a deterioration state of a load bearing capacity in an elevator suspension member arrangement having several suspension members, such as belts, including electrically conductive cords incorporated into an elastomer material. Deterioration is determined by applying alternating electric voltages to the cords included in legs of a circuitry. Phase shifts between the alternating voltages, for example by determining sum voltages and/or differential voltages, provide valuable information about a condition of the belt. A fixation arrangement of the suspension member arrangement is adapted to enable or simplify the proposed measurements. Furthermore, counting a number of performed bending cycles provides further information to be taken into account for determining the current deterioration state of the belts. Overall, deteriorations in a suspension member such as broken cords, shunts between cords, connections between cords and ground potential and/or deterioration due to corrosion of cords may be easily detected.

An automatic marking system (8) is provided which comprises a rope inspecting device (10) including a camera (15) and an image processor (14) and a rope marking device (17) for providing a mark on the rope in response to the image processor (14) detecting a defect on the rope. The mark distinguishes the type or level of the defect. The rope may be a hoisting rope (3) of an elevator device. The defect may include at least one of reduced diameter, rust, wire brakeage and strand brakeage of the hoisting rope (3).

A method and apparatus are provided for monitoring a suspension member that supports an elevator car and experiences bend cycles as the suspension member facilitates movement of the elevator car between a plurality of door zones. The method and apparatus determine: a number of times the elevator car passes or stops at each of the plurality of door zones; a number of bend cycles experienced by at least one section of the suspension member based on the number of times the elevator car passes or stops at each of the plurality of door zones; and a condition of the suspension member based on a relationship between a determined number of bend cycles and at least one predetermined criterion.

The invention relates to a method for providing condition data of an elevator rope. The method comprises: using current state condition data representing a condition of the elevator rope for the length of the elevator rope in a current state and condition change data indicating at least one potential change in the condition of the elevator rope as input data of a rope condition model; processing the input data with the rope condition model to provide output data comprising condition data of the elevator rope in a new state; and utilizing the provided condition data of the elevator rope to update the current state condition data or in an elevator call allocation process. The invention relates also to an elevator computing system and a computer program product for providing condition data of an elevator rope.

A method for an elevator call allocation of an elevator group includes obtaining call information indicative of at least one generated elevator call; generating a plurality of candidate allocations in response to obtaining the call information; defining at least two allocation objectives for each candidate allocation, wherein the defined at least two allocation objectives comprise a rope bending cost and at least one other allocation objective; and selecting the allocation for the at least one elevator call from among the candidate allocations based on the defined at least two allocation objectives. An elevator computing system and a computer program product for an elevator call allocation of an elevator group are also described.

A deterioration state of load bearing capacity in an elevator suspension member having a plurality of electrically conductive cords is detected by: providing a multi-phase alternating current circuitry including electrically conductive legs; applying at least one phase of a multi-phase alternating current to at least one of the cords electrically connected to one of the legs; applying at least another phase of the current to at least another cord and at least one resistor electrically connected to at least another leg; measuring an electric indicator current being at least one of a net sum of all phases of the current and an electric bypass current through a neutral wire being connected in parallel to the circuitry, wherein a peak current in each phase is shifted by a phase angle with respect to a peak current in another phase; and determining the deterioration state based on the measured indicator electric current.

A device for monitoring tension equalization and displacement adjustment states of steel wire ropes of a multi-rope hoister includes a displacement sensor mounted on a steel wire rope tension equalization device, a signal acquisition transmitter designed to store and transmit signals of the displacement sensor, a barometric altimeter designed to detect the depth of a mine shaft where a hoisting container is located, and a wireless receiving and processing system arranged at the well mouth of the mine shaft. A method for use includes collecting the displacement adjustment amounts of the tension equalization devices connected with all the hoisting ropes of the hoisting container and the corresponding depth position of the hoisting container during the up-down running process of the hoisting container by means of the signal acquisition transmitter; judging the maximum displacement adjustment amount measured in the entire hoisting process and the corresponding tension adjustment device and corresponding depth, by receiving and processing data via the wireless receiving and processing system; and, giving an alarm when the maximum adjusted displacement is greater than a preset adjustment threshold.