LOCATION INDICATION Russian patent published in 2018 - IPC G01H9/00 

FIELD: measuring equipment.

SUBSTANCE: method of determining the location of interest in the area, including the stages, at which at least the first acoustic source is placed in the first position in the location of interest and the second acoustic source is placed in the second position in the location of interest, while at least one of the first and second positions represent the external range of the location of interest, at least the first acoustic source and the second acoustic source are activated for the generation of the specified acoustic output signal, the distributed acoustic measurement is performed for at least one optical fiber, disposed at least partially in the abovementioned area, and the acoustic signals, detected by the abovementioned distributed acoustic measurement, are analyzed to detect the abovementioned specified acoustic sequence and to indicate the location of the at least abovementioned first acoustic source and the second acoustic source.

EFFECT: determination of employee location accuracy.

16 cl, 4 dwg