RU2762706C1 - Method for electronic marking of a fiber-optic cable route - Google Patents

Abstract

FIELD: measuring techniques.

SUBSTANCE: invention relates to a measuring technique and is intended to determine the route of laying a fiber-optic cable laid in a cable duct and, in particular, using the "microcable in a microtube" technology in a multichannel transport communication. The technical task of the claimed method is to develop a method for marking a fiber optic cable. The effect is achieved in that, according to the method of electronic marking of the route of the fiber optic cable, a plurality of electronic markers at predetermined intervals are fixed on an extended structure made of a non-conductive material, and then this structure is laid along the route of the marked optical fiber cable, while a plurality of electronic markers at predetermined intervals are fixed inside a flexible rod made of a non-conductive material, which has a predetermined stiffness, and then this rod is laid in a package of protective tubes, in which the marked fiber-optic cable is laid, in a free channel.

EFFECT: broadening the scope of the claimed invention.

1 cl, 1 dwg

Description

The invention relates to measuring equipment and is intended to determine the route of laying a fiber-optic cable laid in a package of protective pipes, in particular, using the technology "microcable in a microtube" in transport multichannel communication.

One of the main advantages of fiber-optic cables is the ability to manufacture them completely dielectric, which provides protection from the influence of external electromagnetic fields. In recent years, the laying of fiber-optic cables in a protective pipeline is increasingly used, including in a package of micropipes using the promising technology "microcable in a micropipe" in transport multichannel communication. But even in this case, they strive to exclude the laying in free channels of line-cable structures parallel to the fiber-optic cable of cables with conductive elements in the structure, metal conductors. If this is not done, then it is necessary to take additional measures for electrical safety. In particular, to equip grounding, control and measuring points along the laying route. This entails significant additional costs, and it is not always possible to implement in practice. For example, when laying packages of micropipes with a fiber-optic microcable in a mini-trench along an automobile road. The absence of extended metal elements laid along the route of laying a fiber-optic cable (in its design, in the design of pipelines laid in free channels of protective tubes, etc.) makes it impossible to use well-known induction methods to determine the location of cables and other elements of line-cable structures [1-3].

For these purposes, electronic marking systems are successfully used. There are known methods of electronic marking of extended underground structures (pipelines, cables, etc.) [4, 5], according to which concentrated electronic markers are installed near the structure to be marked at the turns of the laying route, at intersections with other underground structures, near viewing devices, etc. P. The disadvantages of the main series of electronic markers include the fact that for their normal operation it is necessary to align them in a horizontal position [4]. This problem is solved by using special self-aligning ball markers [4]. The general disadvantage of the method of marking extended structures with a system of concentrated electronic markers is due to the limited range of action of the electronic marker, which, depending on the size and design of the marker, the depth of its laying underground, is about 0.2 - 3 m. the volume of route prospecting works and limits the possibilities of marking an extended structure along its length.

The method of electronic marking of an extended underground structure [6] is free from this drawback, which consists in the fact that a plurality of electronic markers at predetermined intervals are fixed on a marker tape or marker cord, which are made of a non-conductive material, and then this marker tape or marker cord is laid over the marked an extended underground structure. These are the so-called electronic marker tape [7] and electronic marker cord [8]. The disadvantage of this method is that for the normal operation of the electronic markers fixed on the tape (cord), it is necessary to align the electronic tape or the tension of the cord when laying them underground, which is quite difficult to control during the construction process. In addition, marker tape and marker cord are difficult to use for marking already built fiber optic cable lines, even if the fiber optic cable is laid in a bundle of protective pipes. Their laying over the commissioned structures is associated with a large volume of manual excavation. The marker tape, especially considering the requirements for its position relative to the ground surface, cannot be laid in the free channels of the protective pipe package. Due to insufficient rigidity, the electronic marker cord cannot be laid in a free channel using the pneumatic laying method. Theoretically, it can be laid by hand, having performed preliminary work on the preparation of the channel. But in practice this is realizable with relatively small distances between viewing devices. With distances between viewing devices of more than one kilometer, which is typical for suburban areas of cable communication lines, it is extremely difficult to implement this. At the same time, it should be noted that in this case it is also necessary to take measures to tension the electronic marker cord.

The essence of the proposed invention is to expand the scope.

This essence is achieved by the fact that according to the method of electronic marking of the route of the optical fiber cable, which consists in the fact that a plurality of electronic markers at predetermined intervals are fixed on an extended structure made of a non-conductive material, and then this structure is laid along the route of the marked optical fiber cable, while a plurality of electronic markers at predetermined intervals are fixed inside a flexible rod made of non-conductive material, which has a predetermined stiffness, and then this rod is laid in a package of protective tubes, in which the marked fiber-optic cable is laid, in a free channel.

Figure 1 shows a block diagram of a device for implementing the proposed method.

The device includes an optical cable 1, a package of protective tubes 2, a flexible bar 3 made of a non-conductive material, which has a given stiffness, electronic markers 4, a device for searching for electronic markers 5.

The device works as follows. Electronic markers 4 are fixed inside a flexible rod 3 made of non-conductive material, which has a predetermined stiffness. Then, a flexible rod 2 made of a non-conductive material, which has a predetermined stiffness, is laid along the route of the marked fiber-optic cable 1 in the free channel of the package of protective tubes 2 by the pneumatic laying method. The operator, using the electronic marker search device 5, sequentially determines the location of the electronic markers 4, fixed at a predetermined interval inside the flexible rod 3 made of non-conductive material, and thereby determines the route of the fiber-optic cable.

Unlike the known method, which is the prototype, in the proposed method, due to the stiffness of the marker rod during its laying, in contrast to the marker tape and marker cord, the self-leveling effect is manifested, as a result of which control of its orientation during laying is not required. This can significantly reduce costs and improve the reliability and accuracy of determining the location of the electronic marker. In contrast to the known method, which is the prototype, due to the rigidity, the marker rod, unlike the marker cord, can be laid in the free channel of the package of protective tubes of the fiber-optic cable line using the pneumatic laying method. As a consequence, the claimed method, in contrast to the known one, which is a prototype, allows marking line-cable structures of already built fiber-optic cable lines after their commissioning. All this allows you to expand the scope of the proposed method in comparison with the known method, which is the prototype.

LITERATURE

1. The theory of buried cable and pipe location // Radiodetection, 2017, 22p. (www.radiodetection.com).

2. RU 2319179 C1 (2006)

3. RU 2352963 C1 (2006)

4. Recommendations for Marking Communication Facilities with the Use of 3M ™ EMS Electronic Markers // 3M ™, Revised June 21, 2005, 12p. (http://www.3m.com/dynatel).

5.US 10401526 B2 (2019)

6. US 5116654 A (1992)

7. 3M ™ EMS Tape 7600-CT series. Bookmarking instructions // 3M ™, 2013, 2 p. (www.3MRussia.ru/Dynatel).

8. 3M ™ Electronic Marking System (EMS) Rope 7700 Series Locatable Rope for Horizontal Directional Drilling and Direct Bury Application Instructions // 3M ™, 78-8141-8030-9 Rev B, 2015, 6 p. (www.3M.com/dynatel).

Claims (1)

A method of electronic marking of a fiber-optic cable route, which consists in the fact that a plurality of electronic markers are fixed at predetermined intervals on an extended structure made of a non-conductive material, and then this structure is laid along the route of a marked optical-fiber cable, characterized in that a plurality of electronic markers are fixed at predetermined intervals inside a flexible rod made of a non-conductive material, which has a predetermined stiffness, and then this rod is laid in a package of protective tubes, in which the marked fiber-optic cable is laid, in a free channel.

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