Car elevator control method and device

Abstract

The invention provides a car elevator control method and device. The method comprises the following steps: 1, whether an elevator door is closed or not is detected before a car ascends and descends; and 2, when the elevator door is not closed, the elevator door is controlled to be opened again. The car elevator control method has the beneficial effects that when it is detected that the elevator door is not closed before elevator car lifts, the elevator door is controlled to be opened again, so that the situation that lifting work is started when the elevator door is not closed is prevented, the elevator is prevented from hurting people, and the safety of the elevator car is improved.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a control method and device for a car elevator. Background technique [0002] Elevators bring convenience for users to go up and down, but the casualties caused by elevators make users terrified. In accidents, it is an indisputable fact that car elevator accidents are more than escalator elevators, and about 80% of car elevator accidents are caused by elevator doors. During the accident process, the elevator door clamped the passenger's car and the car accidentally went up and down, causing the passenger to be squeezed and torn by the door frame of the elevator door and hall door. Users have always attributed the cause of the accident to the improper action of the elevator rider, and the root cause of the accident is that there is a safety defect in the control logic of the car elevator door control system. The defect is that the car should not go up and down without the door ...

AI Technical Summary

Problems solved by technology

Users have always attributed the cause of the accident to the improper action of the elevator rider, and the root cause of the accident is that there is a safety defect in the control logic of the car elevator door control system. The defect is that the car should not go up and down without the door closed. , to be more precise, if the car lifts up and down after the door is completely closed, no matter what improper actions the rider makes, it will not cause casualties to the rider

[0003] The opening and closing of the car door and the lifting of the car in the existing car elevator control system are based on the open-loop control mode based on timing program control. Although the infrared detector is used to detect whether there is an obstacle in the door frame during the closing process of the elevator door, there are two infrared detectors. The main defects: first, there is a detection blind area, and second, even if the object to be detected is in the infrared detection area, the object to be detected must completely block the infrared rays entering the infrared receiver before the infrared receiver can output the detection signal, that is to say: the person taking the elevator cannot appear Only when the blind spot is detected and the infrared rays entering the infrared receiver are completely blocked, the detector can reliably output a detection signal to control the opening of the elevator door or output an alarm sound. Otherwise, the car will go up and down after the door-closing delay ends, and about 80% of car elevator accidents are like this Therefore, it is wrong and unfair to attribute the cause of the accident to the improper action of the elevator rider

The accident proved that the car elevator control system has the following defects: before the car goes up and down, it only uses the infrared detector to detect whether there is an obstacle blocking the closing of the elevator door, and does not detect whether the elevator door is closed. If the infrared detection error or the obstacle is located in the infrared detection blind area , it is easy to cause the passenger to be trapped and cause casualties during the elevator lift

The defect of the existing car elevator door control technology is that: the lift of the car is a time-controlled open-loop control. Before lifting, it only detects whether there is an obstacle between the elevator doors during the closing process of the elevator door, but does not detect whether the elevator door is closed reliably. If the detection is wrong, the car will still go up and down on time, resulting in casualties, which is the root cause of car elevator door accidents

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