METHOD FOR REMOTE DETECTION OF OIL PIPELINE LEAKS ON EARTH SURFACE Russian patent published in 2019 - IPC G01M3/38 G01N21/64 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and concerns a remote method of detecting leaks of oil pipelines. Detection of leaks is carried out by irradiating surface in ultraviolet range at excitation wavelength and detection of fluorescent radiation. To probing the earth's surface, the intensity of fluorescent radiation I (Δλ₁), I (Δλ₂), I (Δλ₃) in three wide spectral ranges Δλ₁, Δλ₂, Δλ₃, selected according to experimental measurements. Presence of oil contamination is determined by following relationships: I(Δλ₁)>R1 and I(Δλ₂)/I(Δλ₁)>R2 and I(Δλ₂)/I(Δλ₃)>R3 (1). For excitation wavelength of 355 nm: Δλ₁=460…480–540…580 nm; Δλ₂=580…590–640…650 nm; Δλ₃=670…680–740…750 nm. For excitation wavelength of 266 nm: Δλ₁=400…420–470…520 nm; Δλ₂=520…530–590…600 nm; Δλ₃=670…680–740…750 nm. R₁, R₂, R₃ are threshold values selected as a result of preliminary studies of fluorescence spectra of oils and spectra of fluorescence of natural formations on earth surface.

EFFECT: longer detection range.

1 cl, 9 dwg