A kind of anti-pinch protection method of elevator car door based on ultrasonic

Abstract

The invention provides an anti-pinch protection method for elevator car doors based on ultrasonic waves, comprising: 1. installing an ultrasonic device on the top of the elevator car door, and performing anti-pinch protection for the elevator car door through the ultrasonic device; 2. starting the ultrasonic device, and the elevator host After receiving the door-opening signal from the elevator door machine, the ultrasonic device emits a measuring point signal and sends the measuring point signal to the elevator host to start the function of real-time detection distance; Closed, the elevator car starts to run; the present invention can effectively detect whether there is a block between the elevator car doors by using the principle of ultrasonic ranging.

Description

technical field [0001] The invention relates to the technical field of elevator detection and inspection, in particular to an ultrasonic-based anti-pinch protection method for elevator car doors. Background technique [0002] The anti-pinch protection device of the elevator car door is an important protection device on the elevator car door, which can prevent passengers from being pinched by the landing door. "Specifications" have carried out relevant regulations on it. At present, common landing door anti-pinch devices mainly include safety touch panels and light curtains; safety touch panels rely on impact to respond, which will not only cause certain damage to passengers or objects, but also easily If the micro switch fails, it may continue to close the door, causing problems such as pinching and crushing of passengers. The light curtain is currently widely used in elevator landing door anti-pinch protection devices. However, the infrared rays used in the light curtain h...

AI Technical Summary

Problems solved by technology

[0002] The anti-pinch protection device of the elevator car door is an important protection device on the elevator car door, which can prevent passengers from being pinched by the landing door. "Specifications" have carried out relevant regulations on it. At present, common landing door anti-pinch devices mainly include safety touch panels and light curtains; safety touch panels rely on impact to respond, which will not only cause certain damage to passengers or objects, but also easily If the micro switch fails, it may continue to close the door, causing problems such as pinching and crushing of passengers

The light curtain is currently widely used in elevator landing door anti-pinch protection devices. However, the infrared rays used in the light curtain have high hygiene requirements, and the infrared transmitter and receiver require high installation accuracy, which is prone to misoperation, resulting in failure. Close the door, and the light curtain is generally installed on the side of the car door. Since the distance between the car door is relatively long, in order to obtain a good protection effect, the light curtain requires a relatively high number of digits, that is, more infrared emission and reception points are required to avoid missing detection; If the number of digits is low, some slender objects cannot be detected, and the elevator is easy to be damaged. Moreover, the elevator light curtain is not sensitive to transparent objects such as glass. run, the glass is crushed, and even the door operator is damaged

In sightseeing elevators or elevators with relatively strong outdoor light, the light curtain is more sensitive to sunlight, which is prone to insensitive work and accidents that cause passengers to be pinched.

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