DEVICE TO MONITOR VIBROACOUSTIC CHARACTERISTIC OF LENGTHY OBJECT Russian patent published in 2015 - IPC G01H9/00 

FIELD: measurement equipment.

SUBSTANCE: group of inventions relates to measurement equipment. The device to monitor vibroacoustic characteristic of a lengthy object according to the first version of realisation comprises a transmitter of optical radiation, two receivers, two sensitive elements, made in the form of optic fibre, two splitters, three communication channels, two couplers, three amplifiers. Fibres are channels of communication of a fibre optic transmission line, the length of which is not less than half of length of the sensitive element. At the same time the outlet of the transmitter is connected only by one first communication channel to each of inputs of two splitters, each of which is accordingly connected to one of sensitive elements, the outlet of one of splitters is accordingly connected by means of the second communication channel of the fibre optic transmission line to the inlet of one receiver of optical radiation, and the outlet of the other splitter by means of the third communication channel - to the inlet of the other receiver of optical radiation. According to the second version of realisation, the outlet of the transmitter is connected only by one first communication channel of the fibre optic transmission line to the input of the first splitter, which is connected to one end of the first sensitive element, which by the opposite end is connected to the inlet of the second splitter connected to the second sensitive element, the outlet of one of splitters is accordingly connected by means of the second communication channel of the fibre optic transmission line to the inlet of one receiver of optical radiation, and the outlet of the other splitter by means of the third communication channel - to the inlet of the other receiver of optical radiation.

EFFECT: increased accuracy of measurements.

7 cl, 3 dwg