Abstract: An elevator door drive comprising: an elevator door motor; and an elevator door controller comprising at least one button; wherein the elevator door controller is arranged to generate a Pulse Width Modulation (PWM) drive signal for driving the elevator door motor; wherein the elevator door controller is arranged to provide an acoustic frequency PWM signal to the elevator door motor responsive to a press of the at least one button. When the elevator door motor is provided with a PWM signal in the acoustic range, the current passing through the motor windings generates forces that result from that current and the magnetic fields in the motor. These forces excite vibrations in the motor components that generate audible noise (which may be referred to as audible magnetic noise or electromagnetic acoustic noise).

Abstract: An elevator system (2) comprises at least one elevator car (6) moving within a hoistway (4); at least one door (10, 11) providing access to the elevator car (6); at least one passenger sensor (21) configured for detecting passengers (30) in the vicinity of the at least one door (10, 11); and a door control device (22) configured for controlling the at least one door (10, 11). The door control device (22) comprises a memory (24) in which at least one predefined movement profile is stored; a modificator (28) configured for modifying the at least one predefined movement profile when the at least one passenger sensor (21) detects a passenger (30) in the vicinity of the at least one door (10, 11); and a door controller (26) configured for controlling the movement of the at least one door (10, 11) based on the at least one movement profile.

Abstract: A system for controlling an elevator comprises a car door operation control system (10) for controlling movement of at least one car door (12), the car door operating control system (10) including an incremental encoder configured to provide a signal indicative of a travel distance of the car door (12) to the car door operating control system (10), and an elevator car control system (50) configured to obtain a primary Car Door Closed Signal from a car door safety switch of an elevator safety control system, said elevator car control system (50) configured to obtain a secondary Car Door Closed Signal (DFCM) independent of the primary Car Door Closed Signal based on the travel distance signal provided by the car door operation control system (10).

Abstract: Automatic door systems and methods capable of determining proper functionality thereof are provided. The door systems are provided with a healthcheck module which automatically determines functionality of the door system by initially monitoring a first output signal provided by a first sensor and a second output signal provided by a second sensor. More specifically, the healthcheck module correlates the first output signal with the second output signal and operates one or more doors of a door system according to the correlation. The healthcheck module then monitors the second output signal provided by the second sensor to determine the ability of the one or more doors to close, and determines functionality of the door system accordingly.

Abstract: A device and method for automatically adjusting safety control parameters of a conveyor are disclosed. The safety device may include various sensors and a safety control module. The safety control module may be preprogrammed with a learn-run method configured to learn operational and mechanical characteristics of a conveyor, validate the operational characteristics of the conveyor based on predefined nominal specifications, and determine a safety function with calibrated safety control parameters by which to monitor conveyor operation.

Abstract: Automatic door systems and methods capable of determining proper functionality thereof are provided. The door systems are provided with a healthcheck module which automatically determines functionality of the door system by initially monitoring a first output signal provided by a first sensor and a second output signal provided by a second sensor. More specifically, the healthcheck module correlates the first output signal with the second output signal and operates one or more doors of a door system according to the correlation. The healthcheck module then monitors the second output signal provided by the second sensor to determine the ability of the one or more doors to close, and determines functionality of the door system accordingly.

Abstract: A device and method for automatically adjusting safety control parameters of a conveyor are disclosed. The safety device may include various sensors and a safety control module. The safety control module may be preprogrammed with a learn-run method configured to learn operational and mechanical characteristics of a conveyor, validate the operational characteristics of the conveyor based on predefined nominal specifications, and determine a safety function with calibrated safety control parameters by which to monitor conveyor operation.

Abstract: A counter (24) increments several times during the duty cycle of a microprocessor (10), and a comparator (30) connected to both outputs a High signal when the microprocessor output exceeds the counter output and outputs a Low signal when the counter output is at least the microprocessor output. The microprocessor output is proportional to desired motor speed for an elevator door drive motor according to a velocity profile stored in a ROM (18). Thereby, the High:Low ratio of the comparator output is a pulse width modulation signal, which is amplified (34) for the motor (12), at a much higher frequency than the microprocessor duty cycle.