摘要:
A gas leak location estimating device includes: an information processor which acquires image information on a plurality of frames from an infrared camera, the information processor being capable of executing: a block discrimination processing of dividing an image area of each of the frames into a plurality of blocks and discriminating whether each of the blocks is a gas area; a count processing of counting a number of times each of the blocks is discriminated as the gas area, over the frames in chronological order, in the block discrimination processing; and a leak location estimation processing of setting, among the blocks, a block whose counted value obtained in the count processing is equal to or larger than a predetermined value as an estimated gas leak location.
摘要:
The invention relates to an optical filtering device (10), in particular for detecting gas remotely, comprising a member (22, 24, 26) including a tubular passage housing a plurality of reflecting structures (34a, 34b, 34c, 34d) that are able to reflect infrared wavelengths, said structures (34a, 34b, 34c, 34d) being elongate along the axis of the tubular passage and placed about this axis. According to the invention, the reflective structures (34a, 34b, 34c, 34d) comprise means for filtering by absorption different wavelength bands located in the infrared spectral band.
摘要:
Described herein is a spectroscopic system and method for measuring and monitoring the chemical composition and/or impurity content of a sample or sample stream using absorption light spectroscopy. Specifically, in certain embodiments, this invention relates to the use of sample pressure variation to alter the magnitude of the absorption spectrum (e.g., wavelength-dependent signal) received for the sample, thereby obviating the need for a reference or ‘zero’ sample. Rather than use a reference or ‘zero’ sample, embodiments described herein obtain a spectrum/signal from a sample-containing cell at both a first pressure and a second (different) pressure.
摘要:
A method for reducing the effects of background radiation introduced into gaseous plume spectral data obtained by an aerial imaging sensor, includes capturing spectral data of a gaseous plume with its obscured background along a first line of observation and capturing a second image of the previously obscured background along a different line of observation. The parallax shift of the plume enables the visual access needed to capture the radiometric data emanating exclusively from the background. The images are then corresponded on a pixel-by-pixel basis to produce a mapping. An image-processing algorithm is applied to the mapped images to reducing the effects of background radiation and derive information about the content of the plume.
摘要:
A fourth embodiment of the present invention is a method of generating a temperature compensated absorbance spectrum. The method includes the steps of: a. providing a sample spectrum and an estimated temperature of a backdrop object (176); b. from a set of known temperature spectra related to a known background temperature, selecting at least two known temperature spectra representing a background temperature above and below the estimated temperature (178); c. comparing the sample spectrum to the known temperature spectra in order to determine a sample background spectrum (179); and d. calculating an absorbance spectrum from the sample spectrum and the background spectrum (181).
摘要:
A fourth embodiment of the present invention is a method of generating a temperature compensated absorbance spectrum. The method includes the steps of: a. providing a sample spectrum and an estimated temperature of a backdrop object (176); b. from a set of known temperature spectra related to a known background temperature, selecting at least two known temperature spectra representing a background temperature above and below the estimated temperature (178); c. comparing the sample spectrum to the known temperature spectra in order to determine a sample background spectrum (179); and d. calculating an absorbance spectrum from the sample spectrum and the background spectrum (181).