RU192307U1 - Optical onboard radiation resistant cable - Google Patents

Abstract

The utility model relates to fiber optic cables. The cable contains three optical fibers that are not hydrophobic lubricated and have a common dense protective coating of UV curable polyacrylate resin. Two of these optical fibers perform the function of hardening. One of the mentioned optical fibers is radiation resistant and is designed to transmit an information signal. The cable contains a dense protective coating, reinforcing aramid filaments, a polymer sheath made of thermoplastic elastomer. The technical result is an increase in durability and reduction of losses. 1 ill.

Description

The technical field to which the utility model relates.

The utility model relates to cable technology, namely, to designs of onboard optical cables intended for indoor and outboard laying on moving objects and for use as part of data acquisition, communication, control and management systems.

State of the art

As the closest analogue, the well-known optical miniature cable for intra- and inter-unit mounting is selected, containing three optical fibers in a polymer sheath made of epoxy acrylate resin (Utility Model Patent of the Russian Federation No. 150288 dated December 29, 2014). A disadvantage of the known cable is not wide enough for some applications. operating temperatures (from minus 60 ° С to plus 85 ° С) and significant attenuation of the optical signal, both at close to extreme values of the operating temperature range, and when exposed to ionizing radiation. In addition, the known cable is not designed to operate in ultra low atmospheric pressure conditions.

Utility Model Essence

The task is to develop an optical cable capable of transmitting a signal in difficult operating conditions.

In the course of solving this technical problem, the following technical result is achieved: reducing signal transmission losses under conditions of simultaneous exposure to low atmospheric pressure, ionizing radiation, low or high temperatures with high mechanical strength and small weight and size characteristics of the cable.

The technical result is achieved by the fact that the optical onboard radiation-resistant cable contains three optical fibers that are not hydrophobic and have a common dense protective coating of UV-curable polyacrylate resin, two of the mentioned optical fibers perform the function of hardening, one of the mentioned optical fibers is radiation resistant and designed to transmit an information signal, reinforcing aramid threads are laid on top of said dense protective coating, on top of which with a flat The polymer sheath made of thermoplastic elastomer is superimposed by a tight compression.

A distinctive feature of this utility model is the absence of a hydrophobic composition on the surface of optical fibers, which allows UV curable polyacrylate to combine fibers into a monolithic core during polymerization, thereby significantly expanding the temperature range of operation and increasing mechanical strength, and reinforcing aramid threads and polymer laid on top of a dense protective coating sheath made of thermoplastic elastomer with tight compression provides additional mechanical protection and protection against aggressive environmental influences.

Brief Description of the Drawings

In FIG. 1 shows a cross section of a cable.

Utility Model Implementation

The onboard miniature radiation-resistant optical cable contains single-mode optical fibers 1 and 2. Position 1 denotes a working radiation-resistant fiber, position 2 denotes two reinforcing fibers. Optical fibers 1 and 2 have a common dense protective coating 3 of UV-curable polyacrylate resin, on top of which reinforcing filaments 4 and a polymer sheath 5 of thermoplastic elastomer with dense compression are sequentially applied.

In the manufacture of the cable using well-known materials manufactured on an industrial scale. The cable manufacturing technology includes the operation of applying a common dense protective coating 3 to the optical fibers 1 and 2, the operation of applying reinforcing threads 4 and a polymer sheath 5.

All operations are performed on the following standard equipment used for the manufacture of cables: a line for applying a secondary protective (buffer) coating and extrusion lines (for applying a sheath).

The cable in accordance with this utility model has the following characteristics:

- the outer diameter of the cable is not more than 3 mm;

- working wavelengths of 1.31 microns and 1.55 microns;

- attenuation coefficient of a single-mode radiation-resistant OM in the cable at operating wavelengths of not more than 1.0 and 0.85 dB / km, respectively;

- resistance to temperature during operation in the range from minus 60 ° to 100 ° C;

- resistance to atmospheric reduced pressure equal to 0.0133 Pa (10 ^-4 mm Hg);

- resistance to gamma radiation of at least 50 kRad;

- induced attenuation with simultaneous exposure to gamma radiation and low temperature minus 60 ° C no more than 20 dB / km;

- weight of 1 km of optical cable no more than 20 kg;

- resistance to hydrostatic pressure 1 MPa;

- resistance to sinusoidal vibration in the frequency range from 1 Hz to 2000 Hz with an acceleration amplitude of 15 g;

- resistance to mold.

Claims (1)

An onboard radiation-resistant cable containing three optical fibers that are not hydrophobic lubricated and have a common dense protective coating of UV-curable polyacrylate resin, two of the mentioned optical fibers perform the hardening function, one of the mentioned optical fibers is radiation-resistant and is intended for transmission information signal, reinforcing aramid threads are laid on top of the dense protective coating, over which a polymer coating is applied with tight compression ka, made of thermoplastic elastomer.

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