APPARATUS AND METHOD FOR VALIDATING LEAK SURVEY RESULTS

摘要

An apparatus and method for validating a leak survey result obtained from an Optical Gas Imaging (OGI) device is proposed. The validation system is coupled to a gas detection infrared thermography camera that captures the infrared image of a scene which may or may not include a gas plume. The validation system performs operations to validate the leak survey result, which includes acquiring a background temperature of each pixel of the infrared image of the scene, acquiring a temperature of the gas plume or ambient air from a temperature sensor that is coupled to the validation system, calculating a temperature difference of said each pixel between the background temperature of said each pixel and the temperature of the gas plume or ambient air, comparing the temperature difference of said each pixel to a predetermined threshold value, and determining whether the leak survey result of the infrared thermography camera is valid based on the temperature difference of said each pixel.

主权项

1. An optical gas imaging (OGI) leak survey system, comprising:
an infrared (IR) thermography camera capable of capturing an infrared image of a gas plume, a leak survey result being obtained from the infrared image of the gas plume; a temperature sensor to measure a temperature of the gas plume or ambient air; and a validation system for validating the leak survey result obtained from the infrared image, the validation system coupled to the infrared thermography camera and coupled to the temperature sensor, the validation system including a machine readable storage medium that provides instructions that cause a machine apparatus to perform operations to validate the leak survey result, the operations comprising: acquiring an apparent temperature of each pixel of the infrared image of a scene; acquiring a temperature of the gas plume or ambient air from the temperature sensor; calculating a temperature difference of said each pixel between the apparent temperature of said each pixel and the temperature of the gas plume or ambient air; comparing the temperature difference of said each pixel to a predetermined threshold value; and identifying areas in the scene where absolute values of the temperature difference are smaller than the predetermined threshold value, and identifying the areas in the scene as unsuitable for an OGI leak survey and as the leak survey for these areas is invalid.