REVERSING DETECTION FOR AN ELEVATOR CAR DOOR

A light grid for mounting on an elevator car door for object detection and for determining periodic door movements, including transmitter elements that emits radiation with a specific intensity, receiver elements for receiving the radiation from an assigned transmitter element, and a control device...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	WEN, Jianyong
Format:	Patent
Sprache:	eng
Schlagworte:	CHECKS FOR WINGS DETECTING MASSES OR OBJECTS DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION ELEVATORS ESCALATORS OR MOVING WALKWAYS FIXED CONSTRUCTIONS GEOPHYSICS GRAVITATIONAL MEASUREMENTS HAULING HOISTING KEYS LIFTING LOCKS MEASURING PERFORMING OPERATIONS PHYSICS SAFES TESTING TRANSPORTING WINDOW OR DOOR FITTINGS WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Beschreibung
Zusammenfassung:	A light grid for mounting on an elevator car door for object detection and for determining periodic door movements, including transmitter elements that emits radiation with a specific intensity, receiver elements for receiving the radiation from an assigned transmitter element, and a control device for evaluating the receiver elements in regard to interruption of the radiation coming from an assigned transmitter element and for outputting a signal for object recognition upon interruption. At least one receiver element is configured to output an intensity value for the received radiation. The control device evaluates the intensity value and distinguishes separate high, medium and low intensity value ranges with high, medium and low intensity values, and performs an alternation phase with at least one alternating from the low via the medium to the low intensity value range and to output a signal in the event of an alternation phase having been recognized.