Abstract: The present invention relates to a method, a system and a computer program product for detecting and/or predicting need for elevator maintenance. A first digital twin of the elevator is generated using data collected by one or more sensors of an unmanned aerial vehicle (UAV) operating within the elevator shaft. One or more threshold values are defined for parameters associated with one or more components of the elevator appearing in the first digital twin. At least one second digital twin of the elevator is generated using data collected by one of more sensors of an unmanned aerial vehicle (UAV) within the elevator shaft. Each parameter of the elevator in the at least one second digital twin is compared to the respective one or more first threshold values. A request for maintenance of the one or more components of the elevator is automatically triggered if any one of the compared parameters meets or goes beyond the respective first threshold value.

Abstract: The invention relates to a system for detecting an out-of-operation state of an elevator system. The system comprising: a signalization sensor unit, at least one actuation sensor device, and a monitoring unit. The signalization sensor unit is configured to obtain signalization traffic data of at least one control system bus of the elevator system. The at least one actuation sensor device is configured to obtain actuation output data of at least one actuator entity of the elevator system followed by the obtained signalization traffic data. The monitoring unit configured to: generate reference actuation output data followed by the obtained signalization traffic data by applying a machine learning module, and generate a signal indicating an out-of-operation state of the elevator system to an external computing entity, in response to a detection of a deviation between the obtained output data and the generated reference output data.

Abstract: The invention relates to a remote monitoring system for an elevator system. The remote monitoring system comprises at least one remotely operable intermediate device and a monitoring unit for remotely controlling operation of the at least one intermediate device at least partly. The monitoring unit is configured to: control at least one intermediate device to generate a remote com-mand for controlling at least one operation of the elevator system, and monitor a response of the elevator system to the remote command. The invention relates also to a method for remotely monitoring an elevator system.