Волокно-оптична система інтервальних вимірювань фізичних величин

Abstract

The proposed fiber-optical device for measuring physical parameters represented by time intervals contains a radiation emitter, n fiber-optical parameter transducers, and a photoreceiver that are connected in series by sections of fiber-optic cable. The photoreceiver output is connected to a signal processor. The fiber-optical parameter transducer is designed as a measuring time interval transducer and contains an output optical signal branching unit. The first output of the optical signal branching unit is connected to a short reference lightguiding fiber section with a length that is identical for all the measuring transducers. The second output of the optical signal branching unit is connected to a measuring lightguiding fiber section. The reference and measuring lightguiding fiber sections are connected to the corresponding optical summing unit, the output of which is used as the output of the measuring transducer. The length of each measuring lightguiding fiber section is different for the different measuring transducers. The said length is determined in conditions without overlap of optical pulses at the output of the measuring transducer when the measured physical parameter changes within a specified range. The signal processor contains an amplitude pulse selector and a time interval meter that are connected in series.