METHOD FOR MONITORING STATUS OF EXTENSIVE OBJECTS, PRIMARILY, PRODUCT LINES, AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2006 - IPC G01D5/353 

FIELD: oil-gas industry, possible use for diagnostics of extensive objects used during operation of wells or during transportation of product to collection stations and further, etc.

SUBSTANCE: method for monitoring status of extensive objects includes equipping extensive object with sensitive optical fiber, producing a series of coherent optical impulses with length T with spectrum width about 1/T and temporal interval between impulses equal to T₁, organization of reflection-metric channel and feeding aforementioned impulses into sensitive optical fiber with length L, registration of amplitude of reverse dissipation signals, comparative analysis of aforementioned reverse dissipation signals in serial reflectograms and selecting local changes in them, pointing at presence of influence on extensive object, while coordinate of position of influence resulting from presence of selected local changes along the length of sensitive optical fiber is determined by position of changes on reflectogram, while a condition is maintained, in accordance to which length L of sensitive optical fiber is such, that temporal interval T₁ between impulses exceeds value 2L/V, where: V-speed of light in sensitive optical fiber, while registration of amplitude of reverse dissipation signal is performed by means of photo-receiver with temporal resolution not worse than duration of impulse T. The method is realized by means of an appropriate device.

EFFECT: decreased requirements to coherence of impulse source of optical radiation used during diagnostics (width of optical impulse spectrum may be equal to about 1/T); increased number of measuring channels and working length of sensitive optical fiber.

2 cl, 3 dwg