CN217689555U

CN217689555U - Optical fiber sensor

Info

Publication number: CN217689555U
Application number: CN202222089307.6U
Authority: CN
Inventors: 陈志勇
Original assignee: Guangdong Terrace Intelligent Sensor Technology Co ltd
Current assignee: Guangdong Terrace Intelligent Sensor Technology Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-10-28
Anticipated expiration: 2032-08-09

Abstract

The utility model discloses an optical fiber sensor, it includes: the optical fiber connector comprises a transmitting optical fiber and a receiving optical fiber, wherein one end of the transmitting optical fiber and one end of the receiving optical fiber are respectively provided with an optical fiber plug, and the other ends of the transmitting optical fiber and the receiving optical fiber are connected to a connecting piece together; in the region between the connector and the ferrule, the launch and receive optical fibers are encased in a combination cable, the combination cable comprising: the optical fiber cable comprises an elastic first metal sleeve for the transmission optical fiber and the receiving pipeline to pass through, and a first insulating layer coated outside the first metal sleeve; in the area between the ferrule and the two optical fiber plugs, the transmitting optical fiber and the receiving optical fiber are respectively coated in the independent cables. After the technical scheme is adopted, the utility model discloses can form fine protection to optical fiber, promote optical fiber sensor tensile, compressive capacity to have waterproof, grease proofing, prevent static, resistant crooked, exempt from the sleeve pipe efficiency, promoted the life of product greatly.

Description

Optical fiber sensor

The technical field is as follows:

the utility model relates to a signal sensor product technical field refers in particular to an optical fiber sensor.

The background art comprises the following steps:

the optical fiber sensor is an optical signal sensor, generally comprising two groups of optical fibers, namely a transmitting optical fiber and a receiving optical fiber, wherein optical signals are transmitted through the transmitting optical fiber, transmitted to a signal modulator or other components, transmitted through the receiving optical fiber, and subjected to detection, signal transmission and other functions through the change of the optical signals.

In the optical fiber sensor, the optical fiber bundle must be protected to ensure smooth transmission of optical signals, so the optical fiber bundle is usually sleeved in a plastic sleeve. In order to protect the optical fiber from damage during use, a corrosion-resistant rubber material is usually used for a plastic sleeve for protecting the optical fiber bundle, and a protective sleeve is added at the connecting part of the optical fiber bundle and the connector. See the Chinese patent numbers: the utility model discloses a 201620701388.2, it is provided with the protective sheath at the position of connecting of optic fibre bundle and connector.

In the use process of the optical fiber sensor, due to the influence of the use environment, the optical fiber bundle is not only subjected to the action of tensile force and pressure, but also bent at a large angle, and meanwhile, water, oil and the like in the use environment can corrode the optical fiber bundle.

The utility model has the following contents:

the utility model discloses the technical problem that will solve just lies in overcoming the not enough of current product existence, provides an utensil optical fiber sensor.

In order to solve the technical problem, the utility model adopts the following technical scheme: an optical fiber sensor comprising: the optical fiber connector comprises a transmitting optical fiber and a receiving optical fiber, wherein one end of the transmitting optical fiber and one end of the receiving optical fiber are respectively provided with an optical fiber plug, and the other ends of the transmitting optical fiber and the receiving optical fiber are connected to a connecting piece together; in the region between the connector and the ferrule, the launch and receive optical fibers are encased in a combination cable, the combination cable comprising: the optical fiber cable comprises an elastic first metal sleeve for the transmission optical fiber and the receiving pipeline to pass through, and a first insulating layer coated outside the first metal sleeve; in the area between the sleeve member and the two optical fiber plugs, the transmitting optical fiber and the receiving optical fiber are respectively covered in independent cables.

Further, in the above technical solution, the independent cable includes: the second metal sleeve is used for the transmission optical fiber or the receiving pipeline to pass through, and the second insulating layer is coated outside the second metal sleeve.

Further, in the above technical solution, the first metal sleeve and the second metal sleeve are both sleeves spirally surrounded by a metal strip.

Further, in the above technical solution, the sleeve member has a first connecting end butted with the combined cable and a second connecting end butted with the two independent cables, and a diameter of the first connecting end is smaller than a diameter of the second connecting end.

Furthermore, in the above technical solution, a plastic body for packaging and fixing is disposed in the sleeve member.

Further, in the above technical solution, the transmitting optical fiber and the receiving optical fiber are both coated with a fiber protection layer.

Further, in the above technical solution, the connecting member is a threaded sleeve.

Further, in the above technical solution, the connecting element is an optical fiber adapter.

Further, in the above technical solution, the optical fiber plug includes: the cable connecting pipe and the insert pipe are integrally formed, the independent cable is fixedly inserted into the cable connecting pipe, and the transmitting optical fiber or the receiving optical fiber extends into the insert pipe.

Furthermore, in the above technical solution, a metal ring flush with the port of the insertion tube is fixed in the insertion tube, and the metal ring is sleeved outside the transmitting optical fiber or the receiving optical fiber.

After the technical scheme is adopted, the utility model discloses can form fine protection to optical fiber, promote optical fiber sensor tensile, compressive capacity to have waterproof, grease-proof efficiency, promoted the life of product greatly.

Description of the drawings:

fig. 1 is a schematic view of a first embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a combination cable according to a first embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of an independent cable according to a first embodiment of the present invention;

FIG. 4 is a schematic view of an internal structure of a casing member according to a first embodiment of the present invention;

fig. 5 is a schematic view of an internal structure of an optical fiber plug according to a first embodiment of the present invention;

fig. 6 is a schematic diagram of a second embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

The utility model relates to an optical fiber sensor, it is shown to see fig. 1 to fig. 5, and this is the embodiment of the utility model I, it includes: a transmitting optical fibre 1, a receiving optical fibre 2, an optical fibre plug 3, a connector and a ferrule element 5.

In order to protect the transmitting optical fiber 1 and the receiving optical fiber 2, the outer portions of the transmitting optical fiber 1 and the receiving optical fiber 2 are covered with a protective optical fiber layer 10, and the protective optical fiber layer 10 can be made of plastic, rubber and other materials to protect the transmitting optical fiber 1 and the receiving optical fiber 2 from the ground. The transmitting optical fiber 1 and the receiving optical fiber 2 may be independent optical fibers (i.e. only one optical fiber), or may be optical fiber bundles formed by combining a plurality of optical fibers. The method can be selected by self according to different application scenes.

And one ends of the transmitting optical fiber 1 and the receiving optical fiber 2 are respectively provided with an optical fiber plug 3, and the other ends of the transmitting optical fiber 1 and the receiving optical fiber 2 are connected to a connecting piece 4 together.

In the region between the connector 4 and the sleeve element 5, the transmitting optical fibre 1 and the receiving optical fibre 2 are enclosed in a combination cable 6. In the area between the sleeve element 5 and the two optical fiber plugs 3, the transmitting optical fiber 1 and the receiving optical fiber 2 are respectively coated with a separate cable 7.

In conventional fibre optic sensors, the transmit 1 and receive 2 fibres are provided as two separate fibres, which are typically independent and are brought together only when the connectors are mated and connected to them. Thus, when the lengths of the transmitting optical fiber 1 and the receiving optical fiber 2 are long, the mutual winding and knotting may occur, so the transmitting optical fiber 1 and the receiving optical fiber 2 are divided into the combined cable 6 and the independent cable 7 in the present embodiment, wherein the transmitting optical fiber 1 and the receiving optical fiber 2 are wrapped together in the combined cable 6 at the section of the combined cable 6. In the independent cable 7, the transmitting optical fiber 1 and the receiving optical fiber 2 are independent from each other so as to be inserted into the optical fiber modulator through optical fiber plugs respectively.

As shown in fig. 2, the combination cable 6 includes: a first metal sleeve 61 for transmitting the optical fiber 1 and the receiving pipeline 2, and a first insulating layer 62 coated outside the first metal sleeve 61.

As shown in connection with fig. 3, the independent cable 7 includes: a second metal sleeve 71 for passing the transmitting optical fiber 1 or the receiving pipeline 2, and a second insulating layer 72 covering the second metal sleeve 71.

After adopting above-mentioned structure, launching optic fibre 1 and receiving line 2 all have triple safeguard measure: a fiber protection layer 10, a first metal sleeve 61 and a second metal sleeve 71, and a first insulation layer 62 and a second insulation layer 72. The first metal sleeve 61 and the second metal sleeve 71 are both sleeves spirally wound by metal strips, the sleeves spirally wound by the metal strips are similar to spring tubes, and can play a role in protection. Meanwhile, the first metal sleeve 61 and the first insulating layer 62 are combined with each other, and the second metal sleeve 71 and the second insulating layer 72 are combined with each other, which also increases the tensile strength of the whole combined cable 6 and the independent cable 7, so that the optical fiber sensor can bear large tensile force without deformation and breakage.

As shown in fig. 4, the sleeve member 5 has a first connecting end 51 for connecting with the combined cable 6 and a second connecting end 52 for connecting with the two independent cables 7, and the diameter of the first connecting end 51 is smaller than that of the second connecting end 52. The sleeve member 5 is made of metal materials, one combined cable 6 and two independent cables 7 are connected through the sleeve member 5, and the transmitting optical fiber 1 and the receiving optical fiber 2 are separated inside the sleeve member 5.

In order to further protect the transmitting optical fiber 1 and the receiving optical fiber 2 at the butt joint position of the combined cable 6 and the independent cable 7, a plastic body 50 for packaging and fixing is arranged in the sleeve member 5, for example, materials such as polyurethane, rubber and the like are used for packaging, so that not only can the joint position be protected, but also the waterproof and oil-proof functions are realized.

As shown in fig. 5, the optical fiber plug 3, as a standard mating plug, is generally made of plastic material, and includes: the cable connecting pipe 31 and the insert pipe 32 are integrally formed, the independent cable 7 is inserted and fixed in the cable connecting pipe 31, and the transmitting optical fiber 1 or the receiving optical fiber 2 extends into the insert pipe 32.

A metal ring 320 flush with the port of the insertion tube is fixed in the insertion tube 32, and the metal ring 320 is sleeved outside the transmitting optical fiber 1 or the receiving optical fiber 2. The reason why the metal ring 320 is used is that, since the insertion tube 32 often needs to be plugged into and connected to a jack on the fiber modulator, when the fiber modulator is used for a long time, the end of the insertion tube 32 may be worn, which may cause 2 times damage to the internal transmitting optical fiber 1 or receiving optical fiber, and may affect the optical fiber transmission. Meanwhile, at the port position of the insertion tube 32, the optical fiber protection layer 10 on the surface of the transmitting optical fiber 1 and the receiving optical fiber 2 is stripped by a required amount, at this time, the diameter of the port of the insertion tube 32 is larger than the diameters of the transmitting optical fiber 1 and the receiving optical fiber 2, and a certain looseness exists, and after the transmitting optical fiber 1 and the receiving optical fiber 2 are bound by the metal ring 320, the metal ring is fixed at the port position of the insertion tube 32, so that the structural stability of the transmitting optical fiber 1 and the receiving optical fiber 2 can be ensured.

In the embodiment shown in fig. 1, the connecting member is a threaded sleeve 41 for connecting to other components or devices.

Referring to fig. 6, a second embodiment of the present invention is shown, and the second embodiment is different from the first embodiment in that in the second embodiment, the connecting element is a fiber-optic conversion head 42, and the fiber-optic conversion heads 42 can separate the original optical fiber bundles one by one and distribute them in an array.

Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.

Claims

1. A fiber optic sensor, comprising: launch optic fibre and receiving fiber, the one end of launch optic fibre and receiving fiber be provided with the fiber plug respectively, launch optic fibre and receiving fiber's the other end common connection to connecting piece in its characterized in that: also comprises a sleeve member;

in the region between the connector and the ferrule, the launch and receive optical fibers are encased in a combination cable, the combination cable comprising: the optical fiber cable comprises an elastic first metal sleeve for the transmission optical fiber and the receiving pipeline to pass through, and a first insulating layer coated outside the first metal sleeve;

in the area between the sleeve member and the two optical fiber plugs, the transmitting optical fiber and the receiving optical fiber are respectively covered in independent cables.

2. A fiber optic sensor according to claim 1, wherein: the independent cable comprises: the second metal sleeve is used for the transmission optical fiber or the receiving pipeline to pass through, and the second insulating layer is coated outside the second metal sleeve.

3. A fiber optic sensor according to claim 2, wherein: the first metal sleeve and the second metal sleeve are both sleeves spirally surrounded by metal strips.

4. A fiber optic sensor according to claim 1, wherein: the sleeve piece is provided with a first connecting end in butt joint with the combined cable and a second connecting end in butt joint with the two independent cables, and the diameter of the first connecting end is smaller than that of the second connecting end.

5. An optical fiber sensor according to claim 4, wherein: the sleeve piece is internally provided with a plastic body for packaging and fixing.

6. A fiber optic sensor according to claim 1, wherein: and the transmitting optical fiber and the receiving optical fiber are coated with an optical fiber protective layer.

7. A fiber optic sensor according to claim 1, wherein: the connecting piece is a threaded sleeve.

8. A fiber optic sensor according to claim 1, wherein: the connecting piece is a fiber conversion head.

9. A fibre-optic sensor according to any one of claims 1 to 8 wherein: the optical fiber plug comprises: the cable connecting pipe and the insert pipe are integrally formed, the independent cable is fixedly inserted into the cable connecting pipe, and the transmitting optical fiber or the receiving optical fiber extends into the insert pipe.

10. A fiber optic sensor according to claim 9, wherein: the metal ring which is flush with the port of the insertion tube is fixed in the insertion tube, and the metal ring is sleeved outside the transmitting optical fiber or the receiving optical fiber.