Systems, devices, and apparatus for monitoring temperature at remote locations using infrared light

Patent metadata

Field	Value
Publication number	US-11073425-B2
Application number	US-202016739757-A
Country	US
Kind code	B2
Filing date	Jan 10, 2020
Priority date	Mar 29, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A remote monitoring system can include a plurality of infrared cables, where each of the infrared cables can have a respective first opening at a first end of the cable and a respective second opening at a second end of the infrared cable that is opposite the first end. The infrared cables can be configured to conduct infrared light emitted from a respective one of a plurality of monitored locations into the respective first opening to exit at the respective second opening. An infrared camera including an infrared sensor array can be optically coupled to each of the second openings of the plurality of infrared cables.

First claim

What is claimed is:

1. A remote monitoring system comprising:
a plurality of infrared cable stubs each have a respective opening, wherein the respective opening is positioned proximate to a respective one of a plurality of monitored locations, each respective infrared cable stub being configured to conduct a respective infrared light emitted from the respective one of the plurality of monitored locations;
a main infrared cable spliced to each of the plurality of infrared cable stubs to optically couple each respective infrared light from the plurality of infrared cable stubs to the main infrared cable, the main infrared cable configured to conduct the respective infrared light from each of the plurality of monitored locations to a location remote from the plurality of monitored locations; and
a plurality of infrared cable switches, wherein each of the plurality of infrared cable switches is coupled to a respective one of the plurality of infrared cable stubs and is configured to optically isolate infrared light from the respective one of the plurality of infrared cable stubs from the main infrared cable in a first state and is configured to optically couple the infrared light from the respective one of the plurality of infrared cable stubs to the main infrared cable in a second state.

2. The system of claim 1 further comprising:
a processor circuit coupled to the plurality of infrared cable switches, the processor circuit configured to place each of the plurality of infrared cable switches in the second state to optically combine the infrared light emitted from at least two of the plurality of monitored locations to provide combined infrared light to the infrared cable.

3. The system of claim 1 further comprising:
an infrared camera including an infrared sensor array optically coupled to the main infrared cable.

4. The system of claim 3 further comprising:
an enclosure optically blocking a line of sight between the plurality of monitored locations and the infrared sensor array.

5. The system of claim 4 wherein the main infrared cable passes through an opening in the enclosure.

6. The system of claim 4 wherein the enclosure encloses a switchgear.

7. The system of claim 4 wherein the plurality of monitored locations inside the enclosure comprise a plurality of respective breaker contacts.

8. The system of claim 4 wherein the plurality of monitored locations inside the enclosure comprises a bus bar contact and a spot on a bus bar remote from the bus bar contact.

9. The system of claim 3 further comprising:
a processor circuit coupled to an output of the infrared sensor array, the processing circuit configured to receive respective data for each respective predetermined sub-array in the infrared sensor array; and
an electronic display coupled to the processor circuit, the electronic display configured to provide a representation of temperatures at the plurality of monitored locations inside a user defined window shown on the electronic display based on the respective data.

10. The system of claim 9 wherein the user defined window comprises a user redefinable window that is re-drawable by a user to provide a redrawn window to enclose a schematic representation of a selected one of the plurality of monitored locations and to exclude schematic representations of other ones of the plurality of monitored locations outside the redrawn window during operations of the system.

11. The system of claim 10 wherein temperatures of the selected one of the plurality of monitored locations includes a minimum temperature among the plurality of monitored locations enclosed by the redrawn window and a maximum temperature among the plurality of monitored locations enclosed by the redrawn window responsive to the plurality of monitored locations enclosed by the user redefinable window and to exclude temperatures of other ones of the plurality of monitored locations outside the redrawn window.

12. The system of claim 1 wherein the plurality of infrared cable stubs are spliced to the main infrared cable to form respective branches in the main infrared cable.

13. The system of claim 12 wherein the infrared light in the main infrared cable is combined with the infrared light in each of the plurality of infrared cable stubs are combined where the plurality of infrared cable stubs are spliced to the main infrared cable.

14. A remote monitoring system comprising:
a plurality of infrared cable stubs each have a respective opening, wherein the respective opening is positioned proximate to a respective one of a plurality of monitored locations, each respective infrared cable stub being configured to conduct infrared light emitted from the respective one of the plurality of monitored locations inside an enclosure; and
a main infrared cable optically spliced to each of the plurality of infrared cable stubs, the main infrared cable configured to conduct the infrared light from each of the plurality of monitored locations to a location remote from the plurality of monitored locations outside the enclosure.

15. The system of claim 14 further comprising:
an infrared cable switch optically coupled to the main infrared cable, the infrared cable switch configured to optically combine the infrared light emitted from at least two of the plurality of monitored locations to provide combined infrared light on the main infrared cable.

16. The system of claim 14 further comprising:
a plurality of infrared cable switches, wherein each of the plurality of infrared cable switches is coupled to a respective one of the plurality of infrared cable stubs and is configured to optically isolate infrared light from the respective one of the plurality of infrared cable stubs from the main infrared cable in a first state and is configured to optically couple the infrared light from the respective one of the plurality of infrared cable stubs to the main infrared cable in a second state.

17. The system of claim 16 further comprising:
a processor circuit coupled to the plurality of infrared cable switches, the processor circuit configured to place each of the plurality of infrared cable switches in the second state to optically combine the infrared light emitted from at least two of the plurality of monitored locations to provide combined infrared light to the main infrared cable.

18. The system of claim 14 further comprising:
an infrared camera including an infrared sensor array optically coupled to the main infrared cable outside the enclosure.

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Patel Pratik Shirish

Classifications

• G01J5/48

  Thermography; Techniques using wholly visual means · CPC title

• G01J5/0821

  Optical fibres · CPC title

• G01K11/32

  using changes in transmittance, scattering or luminescence in optical fibres · CPC title

• H04Q2209/30

  using a wired architecture · CPC title

• G01K13/06

  in linear movement · CPC title