CN209842163U - Temperature sensing optical cable - Google Patents

Abstract

The application relates to a temperature sensing optical cable, including optic fibre (1), optic fibre (1) outer cladding has tight sleeve pipe (2), and tight sleeve pipe (2) outer cladding has metal collapsible tube (3), and metal collapsible tube (3) outer cladding has aramid fiber enhancement layer (4), and aramid fiber enhancement layer (4) outer cladding has metal weaving layer (5), and the being connected with of metal weaving layer (5) optical cable temperature sensor (7), metal weaving layer (5) outer cladding has sheath (6), wherein, optical cable temperature sensor (7) are located aramid fiber enhancement layer (4) with between sheath (6), the receiving terminal of optical cable temperature sensor (7) is connected respectively the district both ends that await measuring of metal weaving layer. The utility model has the advantages that: adopt the utility model provides a temperature sensing optical cable, design benefit, good reliability, especially when being used for measuring temperature, the distributing type is measured and is reduced the wrong report and miss the report rate, can resist great difference in temperature, and its joint department has temperature sensor, and the security obtains guaranteeing.

Description

Temperature sensing optical cable

Technical Field

The present application relates to an optical cable, and more particularly, to a temperature sensing optical cable.

Background

With the growth of information and the proliferation of network traffic, optical cables have gained a great deal of use as an effective means for large-capacity, long-distance transmission, whereas conventional optical cables have only one function of transmitting information. In order to meet various requirements, such as temperature sensing, it is also necessary to develop an optical cable capable of performing both signal transmission and temperature sensing, and due to its special use environment, similar optical cables are prone to generate local or global temperature rise in the use process, especially the temperature rise at the optical cable connection, which affects the communication quality and even causes irreversible damage to the optical cable.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the high-safety temperature sensing optical cable can be used as a temperature sensor and can also be used for data information transmission.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a temperature sensing optical cable, includes optic fibre, and the cladding has tight sleeve pipe outside the optic fibre, and tight sleeve pipe outsourcing has metal collapsible tube, and the cladding has the aramid fiber enhancement layer outside the metal collapsible tube, and the cladding has the metal braiding layer outside the aramid fiber enhancement layer, and the metal braiding layer be connected with optical cable temperature sensor, the cladding has the sheath outside the metal braiding layer optical cable temperature sensor is located the aramid fiber enhancement layer with between the sheath, optical cable temperature sensor's receiving terminal is connected respectively the district both ends that await measuring of metal braiding layer.

In one embodiment, the metal braided layer is a braided layer formed by braiding copper wires in a pairwise staggered manner, and the receiving ends of the optical cable temperature sensors are respectively connected with the staggered positions of the copper wires and measure the potential difference between the two positions.

In one embodiment, the area to be measured is located at the joint of the temperature sensing optical cable.

In one embodiment, the metal hose is a spiral metal hose.

In one embodiment, the optical fiber is 50/125 μm multimode fiber.

The utility model has the advantages that: adopt the utility model provides a temperature sensing optical cable, design benefit, good reliability, especially when being used for measuring temperature, the distributing type is measured and is reduced the wrong report and miss the report rate, can resist great difference in temperature, and its joint department has temperature sensor, and the security obtains guaranteeing.

Drawings

The technical solution of the present application is further explained below with reference to the drawings and the embodiments.

Fig. 1 is a schematic structural diagram of a temperature sensing optical cable according to an embodiment of the present application.

Fig. 2 is a partial schematic view of a temperature sensor and a metal braid of the temperature sensing optical cable according to the embodiment of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.

Referring to fig. 1, the temperature sensing optical cable according to the embodiment of the present invention includes an optical fiber 1, a tight sleeve 2 is coated outside the optical fiber 1, a metal hose 3 is coated outside the tight sleeve 2, an aramid fiber reinforced layer 4 is coated outside the metal hose 3, and a metal braid layer 5 is coated outside the aramid fiber reinforced layer 4. In order to improve the temperature measurement capability at the joint of the optical cable and facilitate timely discovery and maintenance after local overheating, the metal braid 5 is connected with an optical cable temperature sensor 7. In addition, the metal braid 5 is externally covered with a sheath 6. In different embodiments, the cable temperature sensor 7 may be a thermal resistance sensor or a thermocouple sensor.

In the temperature sensing optical cable in this embodiment, the temperature sensing operation is far from that mainly based on the optical time domain reflection of the optical fiber and the backward raman scattering effect of the optical fiber. Laser pulses interact with fiber molecules as they propagate through the fiber, producing many forms of scattering, including rayleigh, brillouin, and raman. The Raman scattering is generated by energy exchange generated by the interaction of thermal vibration optical phonons and photons of optical fiber molecules, the Raman scattering light is composed of Stokes light and anti-Tiotron light with two different wavelengths, and the light intensity difference of the Stokes light and the anti-Tiotron light has a linear relation with the temperature of the optical fiber at a reflection point. Therefore, the Stokes light and the anti-Stokes signals returned by each point of the optical fiber are received and analyzed, so that the temperature value of each point in the whole area can be measured, and the distributed measurement along the optical fiber is realized.

Referring to fig. 2, in one embodiment, the metal braid 5 is a braid formed by braiding two copper wires in pairs, and the receiving ends of the optical cable temperature sensors 7 are respectively connected to the staggered positions of the copper wires and measure the potential difference between the two positions. The temperature change is obtained by a change in the potential difference. Because the optical cable joint easily has the overheat problem, easily leads to the optical cable inefficacy, above-mentioned district of waiting to be measured is located the joint department of temperature sensing optical cable.

Further, in order to protect the optical cable temperature sensor, the optical cable temperature sensor 7 is positioned between the aramid fiber reinforced layer 4 and the sheath 6. Wherein, the sheath 6 can be a low smoke zero halogen flame retardant sheath.

Further, in order to tie the optical fiber and eliminate induced electricity, the interference of the induced electricity to the sensor is reduced, and the accuracy of the sensor is improved, wherein the metal braided layer 5 adopts a copper wire braided layer. The braided copper wire is in good contact with the ground core or used as a ground wire, so that the leakage condition can be reflected in time.

In one embodiment, the metal hose 3 is a spiral metal hose. The metal braid layer 5 is combined to protect the optical fiber 1, so that the mechanical property of the optical cable is improved, the optical cable has good flexibility, and the laying is convenient. The metal protection material in the optical cable can also enable the temperature to be rapidly transmitted to the surface of the optical fiber, and the measurement precision is improved.

In one embodiment, the optical fiber 1 is an 50/125 μm multimode optical fiber, which has good spatial resolution and temperature accuracy, and is more suitable for the temperature sensing requirements of the optical cable in the embodiment of the present application.

Adopt the utility model provides a temperature sensing optical cable, design benefit, good reliability, especially when being used for measuring temperature, the distributing type is measured and is reduced the wrong report and miss the report rate, can resist great difference in temperature, and its joint department has temperature sensor, and the security obtains guaranteeing.

To sum up, the beneficial effects of the utility model are that: adopt the utility model provides a temperature sensing optical cable, design benefit, good reliability, especially when being used for measuring temperature, the distributing type is measured and is reduced the wrong report and miss the report rate, can resist great difference in temperature, and its joint department has temperature sensor, and the security obtains guaranteeing.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.

In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims (5)

1. The utility model provides a temperature sensing optical cable, its characterized in that, includes optic fibre (1), and optic fibre (1) outer cladding has tight sleeve pipe (2), and tight sleeve pipe (2) outer cladding has metal collapsible tube (3), and metal collapsible tube (3) outer cladding has aramid fiber enhancement layer (4), and aramid fiber enhancement layer (4) outer cladding has metal braid (5), and the optical cable temperature sensor (7) that is connected with of metal braid (5), metal braid (5) outer cladding has sheath (6), wherein, optical cable temperature sensor (7) are located aramid fiber enhancement layer (4) with between sheath (6), the receiving terminal of optical cable temperature sensor (7) is connected respectively the district both ends that await measuring of metal braid.

2. The temperature sensing optical cable according to claim 1, wherein the metal braid (5) is a braid formed by weaving copper wires in a pairwise staggered manner, and the receiving ends of the optical cable temperature sensors (7) are respectively connected to the staggered positions of the copper wires and measure the potential difference between the two positions.

3. The temperature-sensing fiber optic cable of claim 2, wherein the zone-to-be-measured is located at a joint of the temperature-sensing fiber optic cable.

4. Temperature sensing optical cable according to claim 1, characterized in that the metal hose (3) is a helical metal hose.

5. The temperature sensing optical cable according to claim 1, wherein the optical fiber (1) is 50/125 μm multimode fiber.