08-08-2023 дата публикации
Номер: CN116558621A
Принадлежит:
The invention discloses a phase-shift grating longitudinal sonic sensor and a packaging method, a grating area of a phase-shift grating is packaged, a polyurethane elastic material is used and solidified in a metal cylinder, the outer diameter of the elastic material is far larger than the diameter of the phase-shift grating, the phase-shift grating is kept to be located at the central axis of the elastic material, one end of the metal cylinder is sealed, and the other end of the metal cylinder is sealed. According to the invention, the mode that the phase shift grating is packaged by the elastic material and is pressed longitudinally is utilized, and the extremely high slope and linearity of the transmission peak of the phase shift grating are combined, so that simpler and highly sensitive sound wave measurement is realized; by measuring the output optical power of the narrow linewidth laser modulated by the sensor, the read measurement data and the sound pressure sensing formula are in ...
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