CN113359250A

CN113359250A - Optical coupling structure

Info

Publication number: CN113359250A
Application number: CN202110633278.2A
Authority: CN
Inventors: 温术来; 于树永; 赵寰宇; 范家斌; 卢江
Original assignee: CRSC Beijing Rail Industry Co Ltd; Rail Transit Technology Research Institute of CRSC Beijing Railway Industry Co Ltd
Current assignee: Beijing Railway Signal Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-09-07

Abstract

The application provides an opto-coupler structure. In the optical coupling structure, the light guide is in a preset shape, so that when the relative position between an external input circuit and an external output circuit is changed, the light guide can adapt to the preset shape by adjusting the preset shape of the light guide; one end of the light guide is arranged at the light emitting point of the light emitter, and the other end of the light guide is arranged at the light receiving point of the light receiver, so that the light emitted by the light emitter can be guided to the light receiver through the light guide, and the transmission between an external input circuit and an external output circuit at any position can be realized; the light-coupled structure can realize the one-way transmission between the external input circuit and the external output circuit at any position and ensure the insulation between the external input circuit and the external output circuit; in addition, the optical coupling structure realizes the transmission by adding the light guide, so the transmission can be realized at low cost through the optical coupling structure.

Description

Optical coupling structure

Technical Field

The invention relates to the technical field of photoelectric equipment, in particular to an optical coupling structure.

Background

An optical coupler, which is called an optical coupler in its entirety and may also be called a photo isolator or a photo coupler, is a device that uses light as a medium to transmit an electrical signal, that is, as shown in fig. 1, a light emitter 01 and a light receiver 02 are packaged in the same package, the light emitter 01 emits light when receiving the electrical signal, and the light receiver 02 senses light to generate and output a photocurrent, thereby implementing the electrical-optical-electrical conversion. The digital circuit has the advantages of small volume, long service life, no contact, strong anti-interference capability, insulation between input and output, unidirectional signal transmission and the like, and is widely applied to digital circuits.

In general, an external input circuit and an external output circuit which are arranged oppositely can be connected through an optical coupler, unidirectional transmission between the external input circuit and the external output circuit is realized, and insulation between the external input circuit and the external output circuit is ensured.

However, when the external input circuit and the external output circuit are not arranged oppositely, if the connection is to be established by the optocoupler, the connection is limited by the space inside the device, and the connection is often realized by complicated wiring, so how to realize unidirectional transmission between the external input circuit and the external output circuit at any position with low cost and ensure insulation between the external input circuit and the external output circuit is one of the problems to be solved urgently at present.

Disclosure of Invention

In view of the above, the present invention provides an optical coupler structure by which unidirectional transmission between an external input circuit and an external output circuit at arbitrary positions can be realized at low cost and insulation between the two can be ensured.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:

the application provides a light coupling structure, includes: a light emitter, a light guide, and a light receiver; wherein:

the light emitter is connected with an external input circuit, and the light receiver is connected with an external output circuit;

the light guide is in a preset shape, one end of the light guide is arranged at a light emitting point of the light emitter, and the other end of the light guide is arranged at a light receiving point of the light receiver;

the light emitter, the light guide and the light receiver are packaged in the same tube shell.

Optionally, the light guide is a U-shaped, Z-shaped or L-shaped light guide pillar.

Optionally, when the light guide is a Z-shaped light guide pillar, the light emitter and the light receiver are respectively disposed at different heights on two opposite sides of the tube housing.

Optionally, when the light guide is a U-shaped light guide, the light emitter and the light receiver are disposed on the same side of the tube shell.

Optionally, when the light guide is an L-shaped light guide pillar, the light emitter and the light receiver are disposed on two adjacent sides of the tube housing.

Optionally, the light emitted by the light emitter is visible light, infrared light or ultraviolet light.

According to the technical scheme, the invention provides an optical coupling structure, which specifically comprises: a light emitter, a light guide, and a light receiver. In the optical coupling structure, the light guide is in a preset shape, so that when the relative position between an external input circuit and an external output circuit is changed, namely the relative position between the light emitter and the light receiver is changed, the light guide can adapt to the preset shape by adjusting the preset shape of the light guide; because one end of the light guide is arranged at the light emitting point of the light emitter, and the other end of the light guide is arranged at the light receiving point of the light receiver, light emitted by the light emitter can be guided to the light receiver through the light guide, and the light receiver generates photocurrent after receiving corresponding light and outputs the photocurrent through the external output circuit, so that the transmission between the external input circuit and the external output circuit at any position can be realized; the light-coupled structure can realize the one-way transmission between the external input circuit and the external output circuit at any position and ensure the insulation between the external input circuit and the external output circuit; in addition, the optical coupling structure realizes the transmission by adding the light guide, so the transmission can be realized at low cost through the optical coupling structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art optocoupler;

fig. 2 to 4 are schematic diagrams of three structures of the optical coupler structure provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In this application, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In order to realize unidirectional transmission between an external input circuit and an external output circuit at any position with low cost and ensure insulation between the two, the embodiment of the present application provides an optical coupling structure, the specific structure of which is shown in fig. 2 (only the example that a light emitter 01 and a light receiver 02 can be respectively arranged on two opposite sides of a package 03), and the optical coupling structure includes: a light emitter 01, a light guide 04, and a light receiver 02.

In the optical coupling structure, a light emitter 01 is connected with an external input circuit, and a light receiver 02 is connected with an external output circuit; the light guide 04 is in a preset shape, one end of the light guide 04 is arranged at a light emitting point of the light emitter 01, and the other end of the light guide 04 is arranged at a light receiving point of the light receiver 02; the light emitter 01, the light guide 04 and the light receiver 02 are enclosed in the same package 03.

The light guide 04 is also called a light guide tube or a light guide pillar, and is a structural member capable of guiding light from a light emitting point to other positions, and in general, the light guide 04 is made of a PC material or a PMMA (Polymethyl Methacrylate) material, so that loss of optical signals is small, and transmission efficiency of the optical signals is not affected, and thus the light guide 04 has a better light guiding performance.

The working principle of the optical coupling structure is described below according to the definition of the light guide 04, which is specifically:

the light emitter 01 emits light upon receiving an electrical signal, and guides the light emitted by itself to the light receiver 02 through the light guide 04, and the light receiver 02 generates a photocurrent upon receiving the light and outputs it through an external output circuit.

Therefore, the optical coupling structure can realize transmission between an external input circuit and an external output circuit at any position; and because the light emitter 01 can only emit light but not receive light, the light receiver 02 can only receive light but not emit light, and the light emitter and the light receiver are insulated from each other, the optical coupling structure can realize unidirectional transmission between an external input circuit and an external output circuit at any positions, and ensure the insulation between the external input circuit and the external output circuit, namely, the relative position between the light emitter 01 and the light receiver 02 in the optical coupling structure is more flexible, and can be selected according to actual conditions, so that the optical coupling structure is more widely applied.

In addition, the optical coupling structure realizes the transmission by adding the light guide 04, and compared with the prior art that unidirectional transmission between an external input circuit and an external output circuit at any position can be realized through complex wiring, and insulation between the external input circuit and the external output circuit is ensured, the optical coupling structure can realize the transmission at low cost.

Optionally, the light guide 04 is a U-shaped (as shown in fig. 3), Z-shaped (as shown in fig. 2) or L-shaped (as shown in fig. 4) light guide column, and in practical applications, including but not limited to this implementation, this implementation is not specifically limited herein, and it is within the scope of the present application as the case may be.

When the light guide 04 is a Z-shaped light guide pillar, the light emitter 01 and the light receiver 02 are respectively disposed at different heights on opposite sides of the package 03, as shown in fig. 2; when the light guide 04 is a U-shaped light guide pillar, the light emitter 01 and the light receiver 02 are both disposed on the same side of the tube shell 03, as shown in fig. 3; when the light guide 04 is an L-shaped light guide, the light emitter 01 and the light receiver 02 are disposed on two adjacent sides of the package 03, as shown in fig. 4.

Optionally, the light emitted by the light emitter 01 may be visible light, infrared light, or ultraviolet light, and in practical applications, including but not limited to the above embodiments, the light is not limited herein, and may be determined according to specific situations, and all of the light is within the protection scope of the present application.

Generally, the light emitter 01 is preferably a light emitting diode, and in practical applications, including but not limited to this preferred embodiment, it is not specifically limited herein, and may be within the protection scope of the present application as the case may be; accordingly, taking the light emitted from the light emitter 01 as infrared light as an example, the light emitting diode is specifically an infrared light emitting diode, and other situations can be inferred from the above description, and will not be described in detail here.

In the above description of the disclosed embodiments, features described in various embodiments in this specification can be substituted for or combined with each other to enable those skilled in the art to make or use the present application. The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A light coupling structure, comprising: a light emitter, a light guide, and a light receiver; wherein:

2. The light coupling structure of claim 1, wherein the light guide is a U-shaped, Z-shaped, or L-shaped light guide post.

3. The light coupling structure according to claim 2, wherein when the light guide is a Z-shaped light guide, the light emitter and the light receiver are respectively disposed at different heights on opposite sides of the package.

4. The light coupling structure according to claim 2, wherein when the light guide is a U-shaped light guide, the light emitter and the light receiver are disposed on the same side of the package.

5. The light coupling structure according to claim 2, wherein when the light guide is an L-shaped light guide, the light emitter and the light receiver are disposed on adjacent sides of the package.

6. A light coupling structure according to any one of claims 1-5, wherein the light emitted by the light emitter is visible light, infrared light or ultraviolet light.