E.N. Pesterev – Master, NRNU MEPhI;

Engineer, Kotel’nikov Institute of Radio Engineering and Electronics of RAS (Fryazino)

F.A. Egorov – Dr.Sc.(Phys.-Math), Leading Research Scientist, 

Kotel’nikov Institute of Radio Engineering and Electronics of RAS (Fryazino) V.T. Potapov – Dr.Sc. (Eng.), Head of Laboratory, 

Kotel’nikov Institute of Radio Engineering and Electronics of RAS (Fryazino)

In connection with the active development of hydrogen energy both in Russia and abroad, a very urgent task is the development of remote control systems for the hydrogen concentration in air, which have increased fire and explosion safety, measurement accuracy and sufficient low response time.

The investigation of ways to create fiber-optic resonance sensors for the hydrogen concentration in air, using the dependence of the frequency of natural oscillations of microoptomechanical resonance systems with a palladium film on the hydrogen concentration. The analysis of the conditions for effective optical excitation of acoustomechanical oscillations and the development of methods for high-precision reading of information on the modes parameters of the natural oscillations of systems; determination of the main sensors characteristics: the measurements range of hydrogen concentration, the accuracy and response time of fiber-optic sensors.

The possibility of creating resonance fiber-optic hydrogen sensors in air with the following characteristics was shown: the range of measured hydrogen concentrations is 0 ÷ 4% (volumetric); the accuracy is ± 0.3%; the response time is not worse than 30 seconds; the remoteness of control objects up to 1 km.

The fiber-optic hydrogen sensors can be used in fire hazardous facilities (nuclear power plants, space rocket industry, etc.). The proposed fiber-optic hydrogen sensors allow highly accurate remote monitoring of hydrogen leaks with sufficient speed, which allows the safe operation of these critical objects.

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