An illustrative example embodiment of an elevator compensation assembly includes a tie down mechanism and at least one compensation sheave that has an outer surface configured to engage at least one compensation rope member. At least one damper is associated with the tie down mechanism for resisting vertical movement of the tie down mechanism in at least one direction. At least one detector directly detects vertical movement of the tie down mechanism along the direction and provides an output indicating at least one characteristic of the detected vertical movement.

An elevator apparatus includes: a traction machine including a sheave around which a middle portion of a main rope from which a car and counterweight are suspended is wound; a controller configured to control travel of the car; a section specification unit configured to specify a determination target section serving as a travel section, including at least a travel position of the car, satisfying a predetermined determination execution condition; a sheave rotation detector configured to detect a sheave rotation amount; and a determinator configured to determine traction performance of the sheave based on the sheave rotation amount detected during travel of the car in the determination target section. The determination execution condition is to have a load weight and an acceleration of the car that cause direction of an acceleration vector of one of a car side and a counterweight side heavier than the other to match an ascent direction.

An illustrative example embodiment of an elevator sheave liner includes a liner body having a first surface configured to engage an elevator load bearing member and an oppositely facing second surface. The liner body includes a plurality of blind holes in the second surface including at least a first blind hole and a second blind hole. The first blind hole has a first depth and the second blind hole has a second, different depth. A material of the liner body has a first thickness between the first blind hole and the first surface and a second, different thickness between the second blind hole and the first surface.

A system for elevator door sensor fusion, fault detection, and service notification is provided. The system includes a processor and a memory including computer-executable instructions that, when executed by the processor, cause the processor to perform operations. The operations include monitoring outputs of a plurality of sensors. It is determined whether the outputs of the plurality of sensors follow an expected pattern. Based at least in part on determining that the outputs of the plurality of sensors do not follow the expected pattern: identifying a sensor in the plurality of sensors that is not following the expected pattern, and transmitting a notification indicating that the sensor is exhibiting unexpected behaviour.

A method of predicting deterioration in a component part of a passenger moving system includes, activating at least one sensor in communication with the component part, performing data acquisition to acquire data from the at least one sensor, processing the data, repeating the processing step over a first specified time period, and triggering a command signal to initiate a maintenance operation and generating a predictive alert, both in response to the processed data reaching a pre-determined threshold.

According to an aspect, a method includes monitoring a plurality of vibration data by a vibration monitoring beacon and determining that the vibration monitoring beacon has been installed at a service location based on detecting an installation characteristic signature in the vibration data. The vibration monitoring beacon can transition into a learning mode based on determining that the vibration monitoring beacon has been installed at the service location. The method can also include monitoring for a learning mode termination event and transitioning the vibration monitoring beacon from the learning mode to a normal operation mode based on detecting the learning mode termination event.

A method and a device for monitoring an elevator car door acquire one or more distances based on light emitted toward the car door by a distance measuring device and reflected at the car door as a function of a current closed state of the car door. Information about the current closed state of the car door is derived solely by comparing the acquired distance with a previously acquired reference distance, and a signal which represents the information can be fed to a remotely arranged control center. The monitoring device can be installed as a retrofit component that is capable of working autonomously in existing elevator systems, does not need to receive any data from a controller of the car door or the elevator system and only requires a relatively simple data processing device that only needs to carry out a comparison of detected distance values with reference values.

A method for determining a state of a system for transportation of passengers includes the steps of: receiving condition data of the system, the condition data being generated by a condition sensor adapted for sensing physical conditions of an equipment of the system; receiving environmental data of the system, the environmental data containing information on an influence of an environment of the system on the equipment and/or the condition sensor; weighting the condition data with the environmental data; and determining a state of the equipment based on the weighted condition data.

A method and a device for monitoring characteristics of an elevator door motion procedure use a smart mobile device including multiple sensors. The method includes: (i) determining a time window, within which a door motion is assumed to occur, including a time interval enclosed by a start time limit and an end time limit and wherein at least one of the start time limit and the end time limit is determined based on first measurement values acquired by a first sensor in the smart mobile device; and (ii) detecting characteristics of the procedure based on second measurement values acquired during the time window by a second sensor in the smart mobile device. Using the method, door motion characteristics can be reliably monitored using a passenger's smart mobile phone while substantially limiting sensing and processing capacities required by the smart mobile phone as well as avoiding compromising passenger privacy requirements.

A method and a device for determining an operating state of an elevator system include determining a current/time profile of a current supplied to the elevator system via a power supply line, identifying at least one current profile segment of the current/time profile, and deriving a current profile pattern of the identified current profile segment. The operating state of the elevator system is determined based on comparing the current profile pattern to at least one reference pattern. The method and the device may also be easily used by personnel without electrical training and may be used in elevator systems that are not known in detail.