| 摘要 |
FIELD: physics, hydrophysics; measurement technology. SUBSTANCE: object fibre coil of interferometer is released from acoustically sensitive envelope and divided to two spatially isolated parts, disposed at known distance to each other. The interferometer allows to select signal being proportional to amplitude of pulsation of temperature at tested medium by means of correlator, if the signal is hauled inside the medium at known velocity. Sonic pressure level may be also measured as in prototype. The second fiber-optic interferometer together with the basic one allows to measure additionally amplitude of pulsation of saltiness and sonic pressure gradient, in case when its fiber coils are disposed onto substrate, which has some gradient pressure at stream. EFFECT: improved precision of measurement. 6 cl, 3 dwg |
