CN213265196U

CN213265196U - Light curtain with self-checking function

Info

Publication number: CN213265196U
Application number: CN202021692705.1U
Authority: CN
Inventors: 颜廷宝; 张维斯
Original assignee: Ningbo Saifute Electronic Co ltd
Current assignee: Ningbo Saifute Electronic Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-05-25
Anticipated expiration: 2030-08-14

Abstract

The utility model relates to a take self-checking function's light curtain, including transmitter, receiver and control box, the control box links to each other with transmitter and receiver respectively, the control box still is connected with light curtain self-checking circuit, light curtain self-checking circuit is used for cutting off after confirming to have the signal of blockking the power of receiver. The invention can carry out self-inspection on the light curtain.

Description

Light curtain with self-checking function

Technical Field

The utility model relates to a light curtain technical field especially relates to a take light curtain of self-checking function.

Background

Along with the continuous promotion of levels such as building, life, people's requirement to the travelling comfort is higher and higher, and the elevator uses more and more extensively, and the elevator safety problem is outstanding day by day. People put higher demands on the safety and reliability of elevator door protection devices. The light curtain in the existing market does not have a self-checking function when in failure or fault operation, and can not provide failure signals for an elevator system, so that the light curtain is easy to fail to cause people clamping accidents of an elevator door.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a take light curtain of self-checking function is provided, can carry out the self-checking to the light curtain.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a take light curtain of self-checking function, includes transmitter, receiver and control box, the control box links to each other with transmitter and receiver respectively, the control box still is connected with light curtain self-checking circuit, light curtain self-checking circuit is used for cutting off after confirming there is the signal that blocks the power of receiver.

The receiver is connected with the power supply through the light curtain self-checking circuit.

The light curtain self-checking circuit is a relay switch circuit.

And a fault output port is arranged on the control box and is connected with the elevator door controller.

Advantageous effects

Since the technical scheme is used, compared with the prior art, the utility model, have following advantage and positive effect: the utility model discloses a set up light curtain self-checking circuit, this light curtain self-checking circuit judges through the mode that cuts off the receiver power whether the light curtain breaks down after judging to have the blocking signal, if break down with signal transmission to control box, carries out fault handling through the control box.

Drawings

Fig. 1 is a block diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

The utility model discloses an embodiment relates to a take light curtain of self-checking function, as shown in FIG. 1, including transmitter, receiver and control box, the control box links to each other with transmitter and receiver respectively, the control box still is connected with light curtain self-checking circuit, light curtain self-checking circuit is used for cutting off after confirming to have the blocking signal the power of receiver. In this embodiment, the transmitter is directly connected to the 24V power supply, and the receiver is connected to the 24V power supply through the light curtain self-test circuit.

The light curtain self-checking circuit adopted in the embodiment is a relay switch circuit, and the power supply of the receiver is cut off through the relay switch.

The working process of the embodiment is as follows: when the light curtain is normal, the emitter sends infrared light to the receiver, if the receiver receives the infrared light, the receiver indicates that there is no blocking signal, and the control box sends a door closing signal to the elevator door controller at the moment, and if the receiver does not receive the infrared light, the receiver indicates that there is a blocking signal, and the control box sends a door opening signal to the elevator door controller at the moment. When the light curtain is in fault, the receiver always receives infrared light, then the elevator door can not be closed, at the moment, the power supply of the receiver is cut off only through the light curtain self-checking circuit, after the power supply of the receiver is cut off, the output signal of the receiver still has a blocking signal at the moment, the fault of the receiver is indicated, after the power supply of the receiver is cut off, the output signal of the receiver is changed into a non-blocking signal at the moment, the normal of the receiver is indicated, and therefore the self-checking of the receiver is achieved.

The control box is provided with a fault output port which is connected with the elevator door controller, when the light curtain self-checking circuit detects that the light curtain has a fault, the fault output port outputs a control signal to the elevator door controller, and the elevator door controller closes the door with 4 joules kinetic energy after receiving the control signal. And the elevator can still operate when the light curtain is in fault.

Claims

1. The utility model provides a take light curtain of self-checking function, includes transmitter, receiver and control box, the control box links to each other with transmitter and receiver respectively, its characterized in that, the control box still is connected with light curtain self-checking circuit, light curtain self-checking circuit is used for cutting off after confirming there is the blocking signal the power of receiver.

2. The light curtain with self-checking function as claimed in claim 1, wherein the receiver is connected to a power source via the light curtain self-checking circuit.

3. The light curtain with the self-checking function according to claim 1, wherein the light curtain self-checking circuit is a relay switch circuit.

4. The light curtain with self-checking function as claimed in claim 1, wherein the control box is provided with a fault output port, and the fault output port is connected with an elevator door controller.