METHOD OF LASER LOCATION OF METHANE LEAKS IN INDUSTRIAL GAS PIPE-LINE AND GEAR FOR ITS REALIZATION Russian patent published in 1998 - IPC

FIELD: gas transportation over pipe-lines. SUBSTANCE: method of laser location of methane leaks in industrial gas pipe-lines includes scanning of pipe-line with three radio frequency laser beams modulated by amplitude, selective reflected laser signal passed through cloud of methane by photodetector on three frequencies corresponding to modulation frequencies of laser beams. Modulation frequency is matched with frequency and time parameters of filters of photodetector. Gear locating methane leaks with the use of laser in industrial gas pipe-lines incorporates laser radiator 1, first amplitude modulator 2, second laser radiator 3, beam splitter 4, second amplitude modulator 7, optical system 8, photodetector 9, signal processing unit 10, scanner 11. EFFECT: improved functional reliability of gear and authenticity of method. 2 cl, 1 dwg