Elevator door light curtain detection protection device

Abstract

The invention discloses an elevator door light curtain detection protection device. The elevator door light curtain detection protection device comprises a detection light eye, a driving mechanism, a transmission mechanism, a control module and a light eye position detection unit; the detection light eye comprises a transmitting end light eye and a receiving end light eye; the transmission mechanism is connected with the driving mechanism and driven by the driving mechanism to drive the transmitting end light eye and or the receiving end light eye to move in a reciprocating mode; the movement speed of the detection light eye is larger than the speed that a user is in or out of an elevator door; the light eye position detection unit is used for determining the movement position of the detection light eye; the control module is connected with the detection light eye and the light eye position detection unit and used for processing a light eye detection signal and a light eye movement position signal. According to the elevator door light curtain detection protection device, the reciprocating movement namely the vertical straight line reciprocating movement or vertical reciprocating swing is performed on the detection light eye through the driving mechanism and the transmission mechanism and accordingly the detection coverage of a light curtain is greatly improved and the blind area can even be avoided through the control on the driving mechanism and accordingly the safety performance of the elevator is greatly improved.

Description

technical field [0001] The invention relates to an elevator light curtain, in particular to a detection and protection device for an elevator door light curtain. Background technique [0002] The automatic door of the elevator is automatically opened and closed under the control of the electric drive device. When the elevator door is in the process of closing, if a passenger enters or exits, there is a risk of being bumped or caught by the door. According to the provisions of 8.7.2.1.1.3 in GB7588-2003, when the passenger is hit or will be hit by the door leaf when passing the entrance during the closing process of the car door, a protection device should automatically reopen the door. The function of this protection device can be It is eliminated in the last 50mm of travel of each active door leaf, and the widely used protection device now adopts the method of light curtain detection. [0003] In the current elevator door light curtain, one side is the detection photocell ...

AI Technical Summary

Problems solved by technology

However, when the distance between the detection photoeye at the transmitting end and the detection photoeye at the receiving end is small and close to a certain range, one detection photoeye at the transmitting end can only correspond to one detection photoeye at the receiving end, and the light at this time is multi-parallel Once the detection object is smaller than the physical distance between the two vertically adjacent detection optical eyes at the transmitting end, it cannot be detected, so there is a certain detection blind area

At present, elevator door light curtain manufacturers can only increase the number of photocells and reduce the physical distance between two vertically adjacent photocells to improve the detection accuracy and reduce the detection blind area. However, no matter how the number of photocells is increased, the physical In terms of installation space, it is impossible to ensure that the entire light curtain strip is full of photocells, and the blind area will not be smaller than a dog leash or skirt tie, and the main cost of the light curtain lies in the detection of photocells, and each additional photocell It will bring great cost pressure to elevator companies

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