System for monitoring a switchgear
AssigneeABB Schweiz AG
InventorsRalf Gitzel, Tomas Kozel
Life of this patent
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Abstract
A system for monitoring a switchgear includes an infrared camera; a processing unit; and an output unit. The infrared camera acquires a first infrared image having a first number of pixels, and the processing unit determines a pixel in the first infrared image with a maximum temperature. The processing unit utilizes a second number less than the first number to determine a temperature interval for the first infrared image equal to a difference between the maximum temperature in the first infrared image and a threshold temperature in the first infrared image. The processing unit is configured to determine that a hot spot exists in the switchgear using the temperature interval for the first infrared image.
Claims15
A system for monitoring a switchgear, the system comprising:
- an infrared camera;
- a processing unit;
- and
- an output unit;
- wherein the infrared camera is configured to acquire a first infrared image of the switchgear, wherein a total number of pixels in the first infrared image is equal to a first number;
- wherein the processing unit is configured to determine a pixel in the first infrared image with a maximum temperature in the first infrared image;
- wherein the processing unit is configured to utilize a second number less than the first number to determine a temperature interval for the first infrared image equal to a difference between the maximum temperature in the first infrared image and a threshold temperature in the first infrared image;
- wherein the processing unit is configured to determine the threshold temperature in the first infrared image as a pixel temperature in the first infrared image that results in a number of pixels in the first infrared image having a temperature between the threshold temperature in the first infrared image and the maximum temperature in the first infrared image that most closely matches the second number;
- wherein the processing unit is configured to determine that a hot spot exists in the switchgear, wherein the determination that the hot spot exists comprises utilization of the temperature interval for the first infrared image;
- and
- wherein the output unit is configured to output an indication of a fault in the switchgear when the determination has been made that a hot spot exists in the switchgear.
A method for monitoring a switchgear, the method comprising:
- acquiring by an infrared camera a first infrared image of a switchgear, wherein a total number of pixels in the first infrared image is equal to a first number;
- determining by a processing unit a pixel in the first infrared image with a maximum temperature in the first infrared image;
- utilizing by the processing unit a second number less than the first number to determine a temperature interval for the first infrared image equal to a difference between the maximum temperature in the first infrared image and a threshold temperature in the first infrared image, wherein the utilizing comprises determining by the processing unit the threshold temperature in the first infrared image as a pixel temperature in the first infrared image that results in a number of pixels in the first infrared image having a temperature between the threshold temperature in the first infrared image and the maximum temperature in the first infrared image that most closely matches the second number;
- determining by the processing unit that a hot spot exists in the switchgear, wherein the determining that the hot spot exists comprises utilizing the temperature interval for the first infrared image;
- and
- outputting by an output unit an indication of a fault in the switchgear when the determination has been made that a hot spot exists in the switchgear.
Dependencies are inferred from the claim text.