System for installing optical fiber

Patent metadata

Field	Value
Publication number	US-11619794-B2
Application number	US-202117235360-A
Country	US
Kind code	B2
Filing date	Apr 20, 2021
Priority date	Apr 20, 2021
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

An apparatus has a cassette configured to hold optical fiber comprising one or more optical sensors. The cassette has a spool configured to one or more of extract and retract the optical fiber from the cassette. A pre-strain mechanism is configured to apply a predetermined pre-strain to the one or more optical sensors. An optical fiber installation tool is configured to mount the optical fiber comprising the one or more pre-strained optical sensors to a surface.

First claim

What is claimed is:

1. An apparatus, comprising:
a cassette configured to hold optical fiber comprising one or more optical sensors, the cassette comprising a spool configured to one or more of extract and retract the optical fiber from the cassette;
a pre-strain mechanism configured to apply a predetermined pre-strain to the one or more optical sensors;
an optical fiber installation tool configured to mount the optical fiber comprising the one or more pre-strained optical sensors to a surface; and
a fiber monitor coupled to the cassette, the fiber monitor configured to monitor at least one parameter of the optical fiber as the optical fiber is extracted from the cassette.

2. The apparatus of claim 1 , wherein the one or more optical sensors comprise one or more fiber Bragg grating (FBG) sensors.

3. The apparatus of claim 1 , wherein the cassette further comprises:
an adjustable shaft disposed such that the spool is configured to rotate about the adjustable shaft, the adjustable shaft configured to handle spools having different diameters; and
a spool controller coupled to the adjustable shaft and configured to rotate the adjustable shaft to perform one or more of extract and retract the optical fiber.

4. An apparatus, comprising:
a cassette configured to hold optical fiber comprising one or more optical sensors, the cassette comprising a spool configured to one or more of extract and retract the optical fiber from the cassette;
a pre-strain mechanism configured to apply a predetermined pre-strain to the one or more optical sensors;
an optical fiber installation tool configured to mount the optical fiber comprising the one or more pre-strained optical sensors to a surface, wherein the optical fiber installation tool comprises:
a body;
one or more contact portions supported by the body and configured to secure the optical fiber;
an adhesive dispenser proximate the body, the adhesive dispenser configured to dispense at least one adhesive to the optical fiber and the surface; and
a dispenser controller operatively coupled to the adhesive dispenser, the dispenser controller configured to control the adhesive dispenser.

5. The apparatus of claim 1 , wherein the at least one parameter comprises at least one of a spooling length, a spooling condition, a total length dispensed, an approximate distance to an optical sensor, a fiber tension, and a fiber integrity.

6. The apparatus of claim 1 , wherein the optical fiber installation tool comprises:
a body;
one or more contact portions supported by the body and configured to secure the optical fiber;
an adhesive dispenser proximate the body, the adhesive dispenser configured to dispense at least one adhesive to the optical fiber and the surface; and
a dispenser controller operatively coupled to the adhesive dispenser, the dispenser controller configured to control the adhesive dispenser.

7. The apparatus of claim 6 , wherein:
the contact portions comprise switchable contact portions that are switchable between a first state that secures the optical fiber and a second state that releases the optical fiber; and
further comprising a contact switch configured to switch the switchable contact portions between the first and second states.

8. The apparatus of claim 7 , wherein:
the adhesive is a curable adhesive; and
further comprising:
a curing device configured to provide a curing energy directed toward the curable adhesive after the curable adhesive is dispensed; and
a curing device controller coupled to the curing device.

9. The apparatus of claim 6 , wherein the adhesive dispenser is configured to dispense:
a first adhesive configured to form a fast bond between the optical fiber and the surface; and
a second adhesive configured to form a slow bond between the optical fiber and the structure.

10. The apparatus of claim 1 , further comprising a sub-spooling system configured to spool fiber released from the cassette.

11. A method of installing optical fiber on a structure, comprising:
loading optical fiber comprising one or more optical sensors on a cassette;
unspooling the optical fiber as the cassette moves along a surface of the structure;
monitoring a condition of the optical fiber as it is being unspooled;
determining whether an installation point is approaching based on the monitoring; and
installing a segment of the optical fiber to the surface based on a determination that the installation point is approaching.

12. The method of claim 11 , further comprising pre-straining the optical fiber before installing the segment of the optical fiber to the structure.

13. The method of claim 11 , further comprising loading the cassette into a sub-spool system to create a sub-spool of optical fiber before installing the segment of the optical fiber to the structure.

14. The apparatus of claim 4 , wherein the one or more optical sensors comprise one or more fiber Bragg grating (FBG) sensors.

15. A system for installing optical fiber, comprising:
a cassette configured to hold optical fiber comprising one or more optical sensors, the cassette comprising a spool configured to one or more of extract and retract the optical fiber from the cassette;
a fiber monitor coupled to the cassette, the fiber monitor configured to monitor at least one parameter of the optical fiber as the optical fiber is extracted from the cassette; and
an optical fiber installation tool configured to mount the optical fiber comprising the one or more optical sensors to a surface.

16. The system of claim 15 , further comprising a fiber installation robot configured to automatically install the optical fiber to the surface.

17. The system of claim 16 , wherein the robot is configured to move along the surface along a defined path.

18. The system of claim 17 , wherein the robot comprises one or more climbing arms configured to move the robot along the defined path.

19. The system of claim 16 , wherein the robot is configured to create a sub-spool of the optical fiber and transfer the sub-spool to the surface.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Chamoun Jacob N
• Chen Qiushu
• Kiesel Peter
• Arakaki Kyle

Classifications

• G02B6/47

  Installation in buildings · CPC title

• G02B6/02076

  Refractive index modulation gratings, e.g. Bragg gratings · CPC title

• G02B6/4457 Primary

  Bobbins; Reels · CPC title

• G01H9/004

  using fibre optic sensors (light guides per se G02B6/00, acousto-optical devices specially adapted for gating or modulating in optical wave guides G02F1/125) · CPC title

• G01B11/165

  by means of a grating deformed by the object · CPC title