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Method and system for rendering visible plume of dispersing fluid so as to reveal its source

A technology for plumes and hydrocarbon fluids, applied in the application of light to test fluid tightness, closed-circuit television systems, testing moving fluids/granular solids, etc., can solve problems such as large optical complexity and cost

Inactive Publication Date: 2016-05-25
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In some systems, this limitation can be mitigated in part by using more exotic spectroscopic techniques that introduce even greater optical complexity and cost, such as cryogenic cooling of specific LWIR sensors

Method used

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  • Method and system for rendering visible plume of dispersing fluid so as to reveal its source

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Embodiment Construction

[0029] figure 1 Given a fluid release plume 1 discharged from a gas flow emission source 2 such as a gas nozzle or a leaking gas storage container or a pipeline or the exhaust pipe of a gas combustion facility, the visibility of the fluid release plume 1 is enhanced by the method of the present invention so that the plume Stream 1 is better seen by the human eye.

[0030] figure 1 The effects of changes in gas concentration and / or temperature within the dispersed plume 1 on the scene seen through the plume 1 are further described.

[0031] The positions of scene elements are chaotically shifted by amounts determined by changes in the refractive index associated with changes in fluid concentration and temperature within the plume 1 . The time scale of the offset reflects the time scale of the mixing process within plume 1 . These effects have been exploited previously in optical Schlieren systems, but direct calculation of these effects from conventional motion image recordi...

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Abstract

A method for monitoring a fluid release plume (1) emitted by an industrial plant and / or an underground hydrocarbon fluid deposit into an adjacent space (3) comprises: a) monitoring the space (3) by means of a video camera during a selected period of time to generate an input video movie of the space (3); b) decomposing the generated input video movie into a series (s) of different spatial frequency bands; c) filtering the series (s) of spatial frequency bands by means of at least one temporal filter; d) amplifying the series (s) of filtered spatial frequency bands by a series of selected amplification factors (alpha 1, alpha 2,...-alpha s, wherein at least one amplification factor (alpha 1) differs from the other amplification factors (alpha 2,... -alpha s); and e) reconstructing an output video movie of the space (3) in which the fluid release plume (1) is enhanced by displaying a recomposition of the series of amplified filtered spatial frequency bands.

Description

technical field [0001] The present invention relates to methods and systems for making a plume of dispersing fluid visible and thereby detecting and locating the source of the plume of dispersing fluid as it passes through a distinguishable different fluid. Background technique [0002] When used in this specification and claims, the term distinguishable different fluids means that they are distinguishable due to chemical composition, concentration, temperature or other physical properties dependent on these properties such as but not limited to refractive index or fluorescent properties. [0003] Existing methods of detection by making fluid transport plumes visible are known from US Patent 6,895,335 and Australian Patent AU200926289 and generally involve extensive specialized imaging systems utilizing the spectral absorption characteristics of the fluid species of interest. Such systems typically require a background source of thermal infrared illumination to reveal the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V9/00G01M9/06G01N21/64G01N21/41G01N21/17
CPCG01M3/38G01N21/6456G01N21/85G01N2021/416G01V9/007G06T5/20G01N2021/1795H04N7/18
Inventor W·J·老赫斯特
Owner SHELL INT RES MAATSCHAPPIJ BV