APPARATUS FOR IMAGING HYDROGEN SULFIDE PLUME AND METHOD OF THE SAME
First Claim
1. An imaging system for detecting hydrogen sulfide, comprising:
- an infrared (IR) imager capable of capturing an image of a scene that includes a gas plume, the infrared imager including a sensor to detect the image; and
a bandpass filter installed in the infrared imager, the image of the scene passing through the bandpass filter, the bandpass filter having a spectral window, a width of the spectral window being in a range of 100 nm to 300 nm, the spectral window placed in a wavelength range selected from the group consisting of a wavelength range between 2.5 μ
m and 2.8 μ
m, a wavelength range between 1.5 μ
m and 2.0 μ
m, and a wavelength range between 7.0 μ
m and 10.0 μ
m.
1 Assignment
0 Petitions
Accused Products
Abstract
As hydrogen sulfide is toxic and widely present in many oil and gas facilities, it is highly desirable to use an infrared camera to detect the presence of a hydrogen sulfide (H2S) plume from a safe distance. The proposed are an imaging system and method for detecting hydrogen sulfide (H2S) in a safe distance. The imaging system includes an infrared (IR) imager capable of capturing an image of a scene that includes a gas plume, and a narrow bandpass filter installed in the infrared imager. The narrow bandpass filter has a spectral window. A width of the spectral window is in the range of 100 nm to 300 nm. The spectral window is included in a wavelength range between 2.5 μm and 2.8 μm, a wavelength range between 1.5 μm and 2.0 μm, or a wavelength range between 7.0 μm and 10.0 μm.
34 Citations
19 Claims
-
1. An imaging system for detecting hydrogen sulfide, comprising:
-
an infrared (IR) imager capable of capturing an image of a scene that includes a gas plume, the infrared imager including a sensor to detect the image; and a bandpass filter installed in the infrared imager, the image of the scene passing through the bandpass filter, the bandpass filter having a spectral window, a width of the spectral window being in a range of 100 nm to 300 nm, the spectral window placed in a wavelength range selected from the group consisting of a wavelength range between 2.5 μ
m and 2.8 μ
m, a wavelength range between 1.5 μ
m and 2.0 μ
m, and a wavelength range between 7.0 μ
m and 10.0 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for detecting hydrogen sulfide contained in a gas plume, the method comprising:
-
capturing an image of a scene that includes the gas plume by an infrared imager, the infrared imager including a sensor to detect the image, a bandpass filter installed in the infrared imager, the image of the scene passing through the bandpass filter, the bandpass filter having a spectral window, a width of the spectral window being in a range of 100 nm to 300 nm, the spectral window positioned in a wavelength range selected from the group consisting of a wavelength range between 2.5 μ
m and 2.8 μ
m, a wavelength range between 1.5 μ
m and 2.0 μ
m, and a wavelength range between 7.0 μ
m and 10.0 μ
m;obtaining an intensity of a background, which does not include the gas plume, from the image of the scene; obtaining an intensity of the gas plume from the image of the scene; calculating intensity difference between the intensities of the background and the gas plume; calculating a relative contrast that is the intensity difference divided by the intensity of the background; and determining whether the relative contrast is higher than a predetermined value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
Specification