Direct burial sensory cable

Patent metadata

Field	Value
Publication number	US-11105993-B2
Application number	US-201916262892-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Dec 6, 2018
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

The present disclosure provides a sensory cable ( 100 ). The sensory cable ( 100 ) includes a central strength member ( 106 ). In addition, the sensory cable ( 100 ) includes a first layer ( 108 ). The first layer ( 108 ) surrounds the central strength member ( 106 ). The first layer ( 108 ) is made of low smoke zero halogen. Further, the sensory cable ( 100 ) includes a plurality of optical units ( 110 ). Furthermore, the sensory cable ( 100 ) includes a second layer ( 112 ). The second layer ( 112 ) is made of a plurality of glass yarns. Moreover, the sensory cable ( 100 ) includes a first jacket layer ( 114 ). The first jacket layer ( 114 ) is made of either polyethylene or polypropylene. Also, the sensory cable ( 100 ) includes a second jacket layer ( 116 ). The second jacket layer ( 116 ) is made of nylon.

First claim

What is claimed is:

1. A sensory cable ( 100 ) for direct buried application comprising:
a central strength member ( 106 ) lying substantially along a longitudinal axis ( 104 ) passing through a geometrical center ( 102 ) of the sensory cable;
a first layer ( 108 ) surrounding the central strength member ( 106 ), wherein the first layer ( 108 ) is made of low smoke zero halogen;
a plurality of optical units ( 110 ) embedded in the first layer ( 108 ), wherein

the plurality of optical units ( 110 ) is positioned along a longitudinal length of the first layer ( 108 ), wherein the plurality of optical units ( 110 ) comprises:
a plurality of loose tubes ( 120 ) embedded inside the first layer ( 108 ), wherein each of the plurality of loose tubes ( 120 ) comprises one or more optical fibers ( 124 ) and a gel;
a second layer ( 112 ) surrounding the first layer ( 108 ) concentrically, wherein the second layer ( 112 ) is made of glass yarns;
a first jacket layer ( 114 ) surrounding the second layer ( 112 ) concentrically; and
a second jacket layer ( 116 ) surrounding the first jacket layer ( 114 ) concentrically.

2. The sensory cable ( 100 ) as claimed in claim 1 , wherein the first layer ( 108 ) has a thickness in a range of 1.8 millimeter±0.3 millimeter, wherein the first jacket layer ( 114 ) is made of one of polyethylene or polypropylene, wherein the first jacket layer ( 114 ) has a thickness in a range of 1.0 millimeter±0.2 millimeter.

3. The sensory cable ( 100 ) as claimed in claim 1 , wherein the second jacket layer ( 116 ) is made of nylon, wherein the second jacket layer ( 116 ) has a thickness in a range of 0.6 millimeter±0.3 millimeter.

4. The sensory cable ( 100 ) as claimed in claim 1 , further comprising a plurality of ripcords ( 122 ), wherein the plurality of ripcords ( 122 ) is positioned diametrically opposite around the central strength member ( 106 ).

5. The sensory cable ( 100 ) as claimed in claim 1 , wherein the central strength member ( 106 ) is made of fiber reinforced plastic, wherein the central strength member ( 106 ) has a diameter in a range of 3.0 millimeter±0.1 millimeter.

6. The sensory cable ( 100 ) as claimed in claim 1 , wherein the central strength member ( 106 ) is up coated with polyethylene material, wherein the central strength member ( 106 ) up coated with polyethylene material has a diameter of 4.2 millimeter.

7. The sensory cable ( 100 ) as claimed in claim 1 , wherein the sensory cable ( 100 ) has diameter in a range of 11.0 millimeters±1.0 millimeter, wherein the sensory cable ( 100 ) has a pulling strength of 2700 Newton, wherein the sensory cable ( 100 ) has a crush resistance of 2200 Newton.

8. The sensory cable ( 100 ) as claimed in claim 1 , wherein the sensory cable ( 100 ) is highly sensitive to external stresses, wherein the sensory cable ( 100 ) has reduced diameter, flexible and robust and enabled to be buried at a depth of up to 5 meters.

9. A sensory cable ( 100 ) for direct buried application comprising:
a central strength member ( 106 ) lying substantially along a longitudinal axis ( 104 ) passing through a geometrical center ( 102 ) of the sensory cable;
a first layer ( 108 ) surrounding the central strength member ( 106 ), wherein the first layer ( 108 ) is made of low smoke zero halogen;
a plurality of optical units ( 110 ) embedded in the first layer ( 108 ), wherein the plurality of optical units ( 110 ) is positioned along a longitudinal length of the first layer ( 108 ), wherein the plurality of optical units ( 110 ) comprises:
a plurality of loose tubes ( 120 ) embedded inside the first layer ( 108 ), wherein each of the plurality of loose tubes ( 120 ) comprises one or more optical fibers ( 124 ) and a gel,

a second layer ( 112 ) surrounding the first layer ( 108 ) concentrically;
a first jacket layer ( 114 ) surrounding the second layer ( 112 ) concentrically; and
a second jacket layer ( 116 ) surrounding the first jacket layer ( 114 ) concentrically,
wherein the sensory cable ( 100 ) is highly sensitive to external stresses, wherein the sensory cable ( 100 ) has reduced diameter, flexible, robust and is enabled to be buried at a depth of up to 5 meters.

10. The sensory cable ( 100 ) as claimed in claim 9 , wherein the second layer ( 112 ) is made of plurality of glass yarns.

11. The sensory cable ( 100 ) as claimed in claim 9 , wherein the first layer ( 108 ) has a thickness in a range of 1.8 millimeter±0.3 millimeter, wherein the first jacket layer ( 114 ) is made of one of polyethylene or polypropylene, wherein the first jacket layer ( 114 ) has a thickness in a range of 1.0 millimeter±0.2 millimeter.

12. The sensory cable ( 100 ) as claimed in claim 9 , wherein the second jacket layer ( 116 ) is made of nylon, wherein the second jacket layer ( 116 ) has a thickness in a range of 0.6 millimeter±0.3 millimeter.

13. The sensory cable ( 100 ) as claimed in claim 9 , wherein the sensory cable ( 100 ) has diameter in a range of 11.0 millimeters±1.0 millimeter, wherein the sensory cable ( 100 ) has a pulling strength of 2700 Newton, wherein the sensory cable ( 100 ) has a crush resistance of 2200 Newton.

Assignees

• Sterlite Tech Ltd

Inventors

• Kumar Sravan
• Wagh Dnyaneshwar
• Sahoo Kishore
• Mishra Atul
• Shukla Vikas

Classifications

• G02B6/4431

  with provision in the protective covering, e.g. weak line, for gaining access to one or more fibres, e.g. for branching or tapping (break-out terminations G02B6/4471) · CPC title

• G01D5/3538

  using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like · CPC title

• G02B6/4434 Primary

  Central member to take up tensile loads · CPC title

• G02B6/4432

  with fibre reinforcements · CPC title

• G01D5/264

  Mechanical constructional elements therefor (G01D5/28, G01D5/32, G01D5/39 and G01D5/40 take precedence); Mechanical adjustment thereof · CPC title