Electrical cabinet infrared monitor systems and methods
Various techniques are provided to monitor electrical equipment. In some implementations, a monitoring system for a cabinet may include an infrared camera and a non-thermal camera. The infrared camera may be configured to capture one or more thermal images of at least a portion of electrical equipment positioned in an interior cavity of the cabinet. The non-thermal camera may be configured to capture one or more non-thermal images such as visible light images of the portion of electrical equipment. In some implementations, combined images may be generated that include characteristics of the thermal images and the non-thermal images for viewing by a user. In some implementations, the cameras may receive electrical power through a physical coupling to an electrical connector within the cabinet and/or through electromagnetic energy harvesting techniques. Other implementations are also provided.
1. A system comprising:
an infrared camera configured to capture a thermal image of at least a portion of electrical equipment positioned in an interior cavity of a cabinet;
a non-thermal camera configured to capture a non-thermal image of at least the portion of the electrical equipment positioned in the interior cavity of the cabinet;
a communication interface, configured to transmit the thermal image and the non-thermal image;
a processor configured to generate a combined image comprising visible spectrum characteristics derived from the transmitted non-thermal image with thermal characteristics derived from a radiometric component of the transmitted thermal image;
an electromagnetic coupler configured to receive electromagnetic energy in response to a current flow through at least one conductor of the electrical equipment within the cabinet;
an energy harvesting circuit configured to provide electrical power in response to the electromagnetic energy received by the electromagnetic coupler; and
a battery configured to store the electrical power provided by the energy harvesting circuit and to power the infrared camera and the non-thermal camera by the stored electrical power.
2. The system of claim 1 , wherein the combined image comprises:
high spatial frequency content of the non-thermal image encoded into a luminance component of the combined image; and
the radiometric component encoded into the luminance component of the combined image and/or encoded into a chrominance component of the combined image.
3. The system of claim 1 , wherein:
the combined image comprises a chrominance component of the non-thermal image encoded into a chrominance component of the combined image;
the radiometric component comprises a luminance component of the thermal image;
the combined image comprises blended image data comprising the radiometric component and a luminance component of the visible spectrum image; and
the blended image data is encoded into a luminance component of the combined image.
4. The system of claim 1 , further comprising a user-viewable screen configured to display the combined image.
5. The system of claim 4 , wherein the user-viewable screen is mounted on an exterior surface of the cabinet.
6. The system of claim 4 , wherein the user-viewable screen is remote from the cabinet.
7. The system of claim 1 , further comprising:
an additional infrared camera configured to capture an additional thermal image of a corresponding portion of the electrical equipment;
an additional non-thermal camera configured to capture an additional non-thermal image of the corresponding portion of the electrical equipment; and
wherein the communication interface is configured to transmit the additional thermal image and the additional non-thermal image for external viewing by the user.
8. The system of claim 1 , wherein the non-thermal camera comprises a visible light camera.
9. The system of claim 1 , wherein:
the thermal image is an unblurred thermal image of at least the portion of the electrical equipment; and
the system further comprises a processor configured to:
determine a plurality of non-uniform correction (NUC) terms based on intentionally blurred thermal images captured by the thermal camera, and
apply the NUC terms to the unblurred thermal image to remove noise from the unblurred thermal image.
10. The system of claim 1 , wherein:
the infrared camera and the non-thermal camera are co-located within the cabinet; and
the electromagnetic coupler comprises:
a coil comprising a resonant tank circuit,
an inductive coil, and/or
a plurality of conductive plates.
11. A method comprising:
capturing, by an infrared camera, a thermal image of at least a portion of electrical equipment positioned in an interior cavity of a cabinet;
capturing, by a non-thermal camera, a non-thermal image of at least the portion of the electrical equipment positioned in the interior cavity of the cabinet;
transmitting, by a communication interface, the thermal image and the non-thermal image;
generating a combined image comprising visible spectrum characteristics derived from the transmitted non-thermal image with thermal characteristics derived from a radiometric component of the transmitted thermal image;
receiving, by an electromagnetic coupler, electromagnetic energy in response to a current flow through at least one conductor of the electrical equipment within the cabinet;
providing, by an energy harvesting circuit, electrical power in response to the electromagnetic energy received by the electromagnetic coupler;
storing, by a battery, the electrical power provided by the energy harvesting circuit; and
powering, by the electrical power stored by the battery, the infrared camera and/or non-thermal camera.
12. The method of claim 11 , wherein the combined image comprises:
high spatial frequency content of the non-thermal image encoded into a luminance component of the combined image; and
the radiometric component encoded into the luminance component of the combined image and/or encoded into a chrominance component of the combined image.
13. The method of claim 11 , wherein:
the combined image comprises a chrominance component of the non-thermal image encoded into a chrominance component of the combined image;
the radiometric component comprises a luminance component of the thermal image;
the combined image comprises blended image data comprising the radiometric component and a luminance component of the visible spectrum image; and
the blended image data is encoded into a luminance component of the combined image.
14. The method of claim 11 , further comprising displaying the combined image on a user-viewable screen.
15. The method of claim 14 , wherein the user-viewable screen is mounted on an exterior surface of the cabinet.
16. The method of claim 14 , wherein the user-viewable screen is remote from the cabinet.
17. The method of claim 11 , further comprising:
capturing, by an additional infrared camera, an additional thermal image of a corresponding portion of the electrical equipment;
capturing, by an additional non-thermal camera, an additional non-thermal image of the corresponding portion of the electrical equipment; and
transmitting, by the communication interface, the additional thermal image and the additional non-thermal image for external viewing by the user.
18. The method of claim 11 , wherein the non-thermal camera comprises a visible light camera.
19. The method of claim 11 , wherein:
the thermal image is an unblurred thermal image of at least the portion of the electrical equipment; and
the method further comprises:
determining a plurality of non-uniform correction (NUC) terms based on intentionally blurred thermal images captured by the thermal camera, and
applying the NUC terms to the unblurred thermal image to remove noise from the unblurred thermal image.
20. The method of claim 11 , wherein:
the infrared camera and the non-thermal camera are co-located within the cabinet; and
the electromagnetic coupler comprises:
a coil comprising a resonant tank circuit,
an inductive coil, and/or
a plurality of conductive plates.