An elevator motion alert system for alerting a mechanic working inside a hoistway comprises a self-power-generating car beacon mounted on an elevator car, a self-power-generating counterweight beacon mounted on a counterweight, and a mobile device carried by the mechanic for receiving signals transmitted from the car beacon and the counterweight beacon and for providing an alert to the mechanic whenever the elevator car or the counterweight is approaching.

An elevator safety system includes: at least two sensors, each of the sensors being configured for monitoring at least a portion of a hoistway of an elevator system and providing monitoring signals; a transformation unit which is configured for transforming the monitoring signals provided by at least one of the sensors and producing transformed signals corresponding to a common direction of vision; a comparison unit which is configured for comparing the at least two transformed signals and for generating a failure signal if a difference between the at least two transformed signals exceeds a predetermined threshold; and a detection unit, which is configured for detecting a person or undesired item in at least one of the two transformed signals and for generating an alarm signal if a person or undesired item is detected.

According to one embodiment, a safety system can comprise at least one receiver, each located in a restricted access area; a safe operation monitor coupled to the at least one receiver configured to detect signals from the at least one receiver; wherein: the at least one receiver is configured to receive signals from a transmitter, the transmitter being used by a worker within the restricted access area; the safe operation monitor is configured to protect the restricted access area, based on the receipt of a signal from the transmitter; and causing an alert on the transmitter.

An elevator inspection operation apparatus for performing an inspection operation for a car in a pit of an elevator includes: an operation mode selector switch configured to switch an operation mode between a normal operation and the inspection operation; a return switch, which is provided outside the pit of the elevator, and is to be manipulated when the operation mode is to be switched from the inspection operation to the normal operation; and a latching relay configured to be latched to an inspection operation side when the operation mode has been switched from the normal operation to the inspection operation by the operation mode selector switch, and to maintain a latched state until the return switch is manipulated when the operation mode has been switched from the inspection operation to the normal operation by the operation mode selector switch.

An elevator device including on-car presence detection units, each being configured to detect presence of a person on top of a corresponding one of cars, on-car operation panels, each to be operated for a manual operation of the corresponding one of cars, and an elevator control device including a car operation approval unit configured to approve or cancel the operation on the on-car operation panels. When the on-car presence detection units have detected the presence of persons on top of the plurality of cars, the operation on the on-car operation panels of all the cars is canceled by the car operation approval unit. When the on-car presence detection unit has detected the presence of a person on top of one of the plurality of cars, the car operation approval unit approves the operation on the on-car operation panel of any one of the plurality of cars.

The present invention relates to the tracking of a maintenance trajectory in an elevator system. An apparatus provided by the present invention for tracking a maintenance trajectory in an elevator system is configured to generate, based on acquired relative height information of a maintenance worker entity in a lifting passage corresponding to the elevator system, maintenance trajectory information corresponding to the maintenance worker entity. The present invention makes it easy to implement monitoring or management of each maintenance operation of each maintenance worker entity, and also makes it easy to judge the compliance status of the maintenance operation.

The object of the invention is an elevator provided with a safety device arrangement, which elevator comprises at least an elevator car traveling along guide rails and a safety brake device for stopping unintended movement of the elevator car. The safety device arrangement comprises a tuning apparatus disposed on the elevator car for detecting a presence on the roof of the elevator car.

A mobile car sheave shield comprises a static shield part 2 sleeved on a car sheave 1, wherein an opening is formed on upper of the static shield part; a dynamic shield part is arranged on the opening; the dynamic shield part comprises a shield bracket 3; an inner side mobile shield 4 and an outer side mobile shield 5 which are synchronously connected are respectively arranged on two sides of a central axis of the shield bracket from inside to outside; the outer side mobile shield and the inner side mobile shield are slidingly connected on the shield bracket. The present invention has the advantages that: by combining the static shield part and the dynamic shield part, the dynamic shield part is moved by the traction rope, to realize mobile protection of the shield, thus offering a clearance constantly meeting safety requirement and guaranteeing safety of a car top worker.

A method of warning a technician is provided. The method comprising: detecting a wireless signal emitted by at least one of a sensor and a user device; determining a distance between the sensor and the user device in response to the wireless signal; determining whether the user device is within a work area in response to the distance between the sensor and the user device; and conveying safety instructions through an application installed on the user device when the user device is determined to be within the work area.

An elevator door wedge monitoring system is provided. The elevator door wedge monitoring system comprising: an engagement sensing system configured to detect an engagement parameter, wherein the engagement parameter indicates whether an elevator door wedge is properly engaged with an elevator door; a communication device in electronic communication with the engagement sensing system and configured to receive the engagement parameter from the engagement sensing system; and an application installed on a user device in wireless communication with the communication device; wherein the communication device is configured to transmit the engagement parameter to the application.