Switchable Opposite Slot Photoelectric Switch

Abstract

The invention is a correlation type optoelectronic switch which adopts two pairs of infrared light tubes changing-over and used for an occasion of a border detection or an end-of travel position detection, for example, an elevator running leveling locating detection and the like. With the help of being provided with two pairs of the infrared light tubes with a changing-over function, the service life of a transmitting tube is greatly improved and is characterized in that the antijamming capability is strong, the circuit is simple and the power dissipation is low. The changing-over type correlation trough type optoelectronic switch adopts various voltage regulator circuits and protective circuits so that the range of the voltage regulators is broad. Signal is output by a square-wave generator to drive an infrared emission module and the received signals are dynamically alternating-current couped to be given to a control output circuit so as to have a strong antijamming capability. The changing-over type correlation trough type optoelectronic switch is provided with two pairs of the infrared light tubes of A and B, when the infrared light is shielded, one pair of the infrared light tube which are worked originally (for example the pair of the infrared light tube A) stops working so that the other pair of the infrared light tube (for example the pair of the infrared light tube B) is switched to work. When the infrared light is not be shielded, the state remains as before. When the infrared light is shielded again, the working pair of the infrared light tube (for example the pair of infrared light tube B) is stopped working, and the pair of the infrared light tube A is switched to work.

Description

technical field [0001] The present invention is a switchable opposite-shooting groove type infrared photoelectric switch, which can improve the reliability and service life, and is used in the application occasions of edge or stroke end position detection, such as leveling positioning of elevator operation and some other blocking light generation output In the case of positioning signals, it is a very important detection element, which belongs to the technical transformation of infrared photoelectric switch devices. Background technique [0002] Infrared photoelectric switches are used in the position detection of moving objects such as elevators, and in the applications of edge or end-of-stroke position detection, such as the leveling positioning of elevator operation and some other blocking light positioning occasions. It is a very important detection element. The stability of its work is not only related to the accurate detection and positioning of moving objects such as ...

AI Technical Summary

Problems solved by technology

The general receiving and processing circuit of the current infrared photoelectric switch adopts a pair of infrared emitting and receiving tubes. No matter what the situation is, the pair of infrared emitting tubes work continuously, resulting in poor anti-interference ability and short service life.

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