ʻO ka nānā ʻana a me ka hana ʻana i ka hōʻailona hōʻailona ʻōlelo mamao laser

Laserka nānā ʻana a me ka hana ʻana i nā hōʻailona ʻike ʻōlelo mamao
ʻO ka decoding o ka walaʻau hōʻailona: ka nānā ʻana i ka hōʻailona a me ka hana ʻana o ka ʻike leo mamao laser
I loko o ke kahua kupanaha o ka ʻenehana, ua like ka ʻike leo mamao laser me kahi symphony nani, akā aia kēia symphony i kāna "noise" ponoʻī - ka leo hōʻailona. E like me ke anaina walaʻau ʻole i ka ʻaha mele, hoʻopilikia pinepine ka walaʻauʻike ʻōlelo laser. Wahi a ke kumu, hiki ke hoʻokaʻawale ʻia ka walaʻau o ka ʻike leo ʻōlelo mamao laser i ka walaʻau i hoʻokomo ʻia e ka laser vibration ana mea kani ponoʻī, ka walaʻau i hoʻopuka ʻia e nā kumu kani ʻē aʻe kokoke i ke ana ʻana o ka vibration a me ka walaʻau i hana ʻia e ka haunaele kaiapuni. ʻO ka ʻike ʻana i ka ʻōlelo lōʻihi e pono e loaʻa nā hōʻailona haʻiʻōlelo i hiki ke ʻike ʻia e ka lohe kanaka a i ʻole nā ​​mīkini, a me ka nui o nā leo i hui ʻia mai ka ʻaoʻao o waho a me ka ʻōnaehana ʻike e hōʻemi i ka lohe a me ka naʻauao o nā hōʻailona ʻōlelo i loaʻa, a me ka puʻunaue alapine. ʻO kēia mau leo ​​he hapa like me ka puʻunaue alapine nui o ka hōʻailona haʻiʻōlelo (ma kahi o 300~3000 Hz). ʻAʻole hiki ke kānana wale ʻia e nā kānana kuʻuna, a pono e hana hou i nā hōʻailona ʻōlelo i ʻike ʻia. I kēia manawa, noiʻi nui nā mea noiʻi i ka denoising o ka leo broadband non-stationary a me ka leo hopena.
Hoʻohana maʻamau ʻia ka walaʻau ākea ākea e ke kaʻina kuhi spectrum manawa pōkole, ke ʻano subspace a me nā algorithm hoʻopau ʻana i ka walaʻau ʻē aʻe e pili ana i ka hana hōʻailona, ​​a me nā ʻano aʻo mīkini kuʻuna, nā ʻano aʻo hohonu a me nā ʻenehana hoʻonui ʻōlelo e hoʻokaʻawale i nā hōʻailona ʻōlelo maʻemaʻe mai ke kua. walaʻau.
ʻO ka walaʻau impulse ka leo kikoʻī e hiki ke hoʻokomo ʻia e ka hopena speckle dynamic i ka wā e hoʻopilikia ʻia ai kahi o ka mea ʻike maka e ke kukui ʻike o ka ʻōnaehana ʻike LDV. I kēia manawa, hoʻoneʻe nui ʻia kēia ʻano walaʻau ma ka ʻike ʻana i kahi i loaʻa i ka hōʻailona ke kiʻekiʻe o ka ikehu kiʻekiʻe a hoʻololi iā ia me ka waiwai wānana.
Loaʻa ka ʻike leo mamao laser i nā manaʻo noi ma nā ʻano he nui e like me ka interception, multi-mode monitoring, intrusion detection, search and rescue, laser microphone, etc. (1) hoʻomaikaʻi i ka hana ana o ka ʻōnaehana, e like me ka sensitivity a me ka ratio signal-to-noise, e hoʻonui ana i ke ʻano ʻike, nā ʻāpana a me ke ʻano o ka ʻōnaehana ʻike; (2) Hoʻonui i ka hiki ke hoʻololi i nā algorithms kaʻina hana hōʻailona, ​​​​i hiki i ka ʻenehana ʻike leo laser ke hoʻololi i nā mamao ana like ʻole, nā kūlana kaiapuni a me nā pahuhopu ana vibration; (3) ʻOi aku ka maikaʻi o ke koho ʻana i nā pahuhopu ana haʻalulu, a me ka uku alapine kiʻekiʻe o nā hōʻailona haʻiʻōlelo i ana ʻia ma nā pahu hopu me nā ʻano pane alapine like ʻole; (4) E hoʻomaikaʻi i ka ʻōnaehana ʻōnaehana, a hoʻonui hou i ka ʻōnaehana ʻike ma o

miniaturization, portability a me ke kaʻina ʻike akamai.

FIG. 1 (a) Ke kiʻi kiʻi kiʻi o ka interception laser; (b) Hoʻolālā kiʻi o ka ʻōnaehana anti-interception laser