Safety detection device and method for door of elevator waiting hall

Abstract

The invention discloses a security detection device for elevator landing doors and the detecting method, one mechanical switch is arranged on each landing door, which is closed when the landing door is close, and is breaking when the landing door is open. The landing signal processing device reads in the signal of the mechanical switches and sends the signal to the elevator controller by serial communication mode. The elevator controller automatically obtains the position of the elevator car and the relevant information in real time, and makes the safety decision according to the position of the elevator car and the state of the mechanical switches on each landing door. The invention has the advantages of detecting the unsafe events that the landing door is opened but the elevator car is not here, and the elevator car arrives certain layer, but is not in the door-open area, and the landing door is opened, effectively improving the safety performance of the elevator.

Description

technical field [0001] The invention relates to an elevator safety detection device, in particular to a device for detecting that the hall door of an elevator landing is unsafely opened. The invention also relates to a safety detection method for elevator landing hall doors. Background technique [0002] In order to protect the safety of the elevator operation, it is necessary to detect the car door and the hall doors of each landing. Only when the elevator car door and the hall doors of all landings are closed, the elevator can start running. Elevator safety regulations in various countries stipulate This is strictly regulated. To deal with this requirement, the general figure 1 The shown safety circuit composed of mechanical switches detects the hall door and car door of the elevator. Only when all the switches are closed and the entire circuit is turned on, is it considered that the hall door and car door of the elevator have been closed, and the elevator can start run...

AI Technical Summary

Problems solved by technology

The problem that this device exists is: (1) production cost is higher; Installation and maintenance are more complicated

(2) Limited by the magnetic field range of the permanent magnet, it is difficult to meet certain elevator functions, such as opening the door in advance and re-leveling after opening the door

(3) The permanent magnet may have electromagnetic interference on other electronic devices in the elevator shaft and the moving elevator car

(4) Since the door area of ​​the elevator is very precise, and the uncertainty of the range of the permanent magnet magnetic field and the installation position, it is impossible to accurately identify whether the elevator stops at the door area, so the device can only detect the floor where the car is not located. The hall door is open, but it cannot be detected that although the car is at the current stop floor, it is not in the area where the door can be opened on this floor and the hall door is opened on this floor

However, the safety circuit composed of switches may be disconnected for a short time, so the action positions of the two switches need to be adjusted accordingly to control the possible disconnection time of the entire safety circuit when the door is normally opened and closed. Short-term shielding detection for this disconnection to avoid misjudgment of normal door opening and closing actions

This will increase the complexity of the system control

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