Selecting laser fluorosensor detection band to monitor oil pipeline leaks

Abstract

Detection bands of the laser fluorosensor to detect oil pipeline leaks have been studied at the fluorescence excitation wavelength 355 nm. It is shown that a diversity of the fluorescence spectra of different oils and plant species leads to the need to adapt the number and position of spectral detection bands of the laser fluorosensor for the specific types of the pipeline oil and vegetation along the pipe way. With no interfering factors (that emerge false alarms) to monitor along the pipe way, only one spectral channel (at maximum position of the oil fluorescence spectrum) can be used. However, there can be a need to use both the two spectral channels (the channel 1 at maximum position of the oil fluorescence spectrum, and the channel 2 at maximum position of the vegetation fluorescence spectrum within ∼ 680…690 nm or ∼ 730…740 nm) and the tree spectral channels (the channel 1 at maximum position of the oil fluorescence spectrum, the channel 2 at maximum position of the vegetation fluorescence spectrum within ∼680…690 nm or ∼ 730…740 nm, and the channel 3 in the spectral band of 625-650 nm).