ʻIke wela a me ke kaomi no Cummins 3408627

Ka hopena piezoelectric

Ke hoʻoheheʻe ʻia kekahi mau dielectrics ma ka hoʻohana ʻana i ka ikaika ma kekahi ʻaoʻao, hana ʻia nā hoʻopiʻi ma luna o kekahi ʻili, a i ka wā e wehe ʻia ai ka ikaika o waho, hoʻi lākou i ke kūlana ʻole. Kapa ʻia kēia hanana i ka hopena piezoelectric maikaʻi. Ke hoʻohana ʻia kahi māla uila i ke kuhikuhi polarization o ka dielectric, e hana ka dielectric i ka deformation mechanical a i ʻole ke kaomi mechanical i kekahi ʻaoʻao. Ke wehe ʻia ke kahua uila waho, e nalowale ka deformation a i ʻole ke kaumaha, i kapa ʻia ʻo ka hopena piezoelectric inverse.

ʻElemu piezoelectric

ʻO ka meaʻike Piezoelectric kahi meaʻike kino a me kahi meaʻike mana. ʻO nā mea piezoelectric maʻamau ʻo Shi Ying crystal (SiO2 _ 2) a me nā seramics piezoelectric synthetic.

ʻO ka piezoelectric mau o nā ceramics piezoelectric he mau manawa i ko Shi Ying crystal, a ua kiʻekiʻe kona ʻike.

4) ka transducer photoelectric

1. hopena photoelectric

Ke hoʻomālamalama ka mālamalama i kekahi mea, hiki ke manaʻo ʻia he kaula kiʻi kiʻi me ka ikehu e pahū ana i ka mea. Inā nui ka ikehu o nā kiʻi kiʻi, e hoʻopau nā electron i loko o ka mea i nā kaohi o nā ikaika o loko a loaʻa nā hopena uila like, i kapa ʻia he hopena photoelectric.

1) Ma lalo o ka hana o ka malamalama, ua kapa ʻia ke ʻano o ka holo ʻana o nā electrons mai ka ʻili o kahi mea i waho o ka hopena photoelectric, e like me ka photoelectric tube a me ka photomultiplier tube.

2) Ma lalo o ka hana o ka malamalama, ua kapa ʻia ka hanana i hoʻololi ʻia ka resistivity o kahi mea i loko o ka hopena photoelectric, e like me photoresistor, photodiode, phototransistor a me phototransistor.

3) Ma lalo o ka hana o ka malamalama, hana kekahi mea i ka ikaika electromotive ma kekahi ʻaoʻao, i kapa ʻia ʻo photovoltaic phenomenon, e like me ka photovoltaic cell (kahi mea pili i ke kūlana o ka mea i hana ʻia ma ka ʻaoʻao photosensitive).

2 Paʻi paʻi kiʻi

Ke hoʻomālamalama ʻia ka photoresistor e ka mālamalama, neʻe nā electrons e hana i nā pālua electron-hole, kahi e liʻiliʻi ai ka resistivity. ʻO ka ikaika o ke kukui, ʻoi aku ka haʻahaʻa o ke kū'ē. Nalo ke kukui hanana, hoʻi hou ka lua electron-hole, a hoʻi mālie ka waiwai kū'ē i kona kumu waiwai.

3. Paipu kiʻi kiʻi

ʻO nā paipu kiʻi kiʻi (photodiode, phototransistor, phototransistor, etc.) no nā mea semiconductor.

4. Electroluminescence

ʻO ka hanana luminescence i hana ʻia e nā mea luminescent paʻa ma lalo o ka hauʻoli o ke kahua uila i kapa ʻia ʻo electroluminescence. ʻO Electroluminescence kahi hana e hoʻololi pololei i ka ikehu uila i ikehu māmā. ʻO ke kukui-emitting diode (LED) kahi mea electroluminescent semiconductor doped me nā mea kūikawā. Ke hoʻokuʻu ʻia ka hui PN i mua, hoʻokumu ʻia ka ikehu keu ma muli o ka hoʻohui hou ʻana o ka electron-hole, i hoʻokuʻu ʻia ma ke ʻano o nā photon a hoʻokuʻu i ka mālamalama.