Enjene ea koloi mafura a tloaelehileng a khatello ea seporo ea mochini oa sensor 1875784C92

1.molao-motheo oa ts'ebetso

Molao-motheo oa ts'ebetso oa "metal resistance gauge" ke ts'ebetso ea hore khanyetso ea khatello holim'a motheo e fetoha ka deformation ea mochini, e tsejoang ka hore ke "resistance strain effect". Boleng ba khanyetso ba conductor ea tšepe bo ka hlahisoa ka foromo e latelang:

R=ρ

Moo: ρ-resistivity ea conductor ea tšepe (ω/m)

S—— Sebaka se arohaneng sa conductor ()

L-length ea conductor (m)

A re nke mohlala oa ho hanyetsa terata ea tšepe. Ha terata ea tšepe e kenngoa tlas'a matla a ka ntle, bolelele ba eona le sebaka sa sefapano se tla fetoha. Ho latela mokhoa o ka holimo, ho ka bonoa habonolo hore boleng ba eona ba ho hanyetsa bo tla fetoha. Haeba terata ea tšepe e otlolloa ka matla a ka ntle, bolelele ba eona bo tla eketseha 'me sebaka sa eona sa sefapano se tla fokotseha,' me boleng ba eona ba ho hanyetsa bo tla eketseha. Ha terata e hatelloa ke matla a ka ntle, bolelele bo fokotseha 'me karolo ea sefapano e eketseha,' me boleng ba ho hanyetsa bo fokotseha. Hafeela phetoho ea ho hanyetsa e lekanngoa (hangata motlakase ho pholletsa le ho hanyetsa o lekanngoa), boemo ba khatello ea terata ea khatello bo ka fumanoa.

2.Tsebeliso ea molao-motheo

Sensara ea khatello ea ceramic e thibelang ho bola ha e na phetiso ea mokelikeli, 'me khatello e sebetsa ka ho toba bokaholimo bo ka pele ba diaphragm ea ceramic, e leng se etsang hore diaphragm e holofale hanyane. Lihanyetsi tse teteaneng tsa lifilimi li hatisitsoe karolong e ka morao ea diaphragm ea ceramic 'me li hokahane ho etsa borokho ba Wheatstone (borokho bo koetsoeng). Ka lebaka la phello ea piezoresistive ea piezoresistor, borokho bo hlahisa lets'oao le phahameng la motlakase le lekanang le khatello le ho lekana le motlakase oa excitation. Letšoao le tloaelehileng le lekantsoe e le 2.0/3.0/3.3 mV/V ho latela mefuta e fapaneng ea khatello. Ka laser calibration, sensor e na le botsitso bo phahameng ba mocheso le botsitso ba nako. Sensor e na le matšeliso a eona a mocheso a 0 ~ 70 ℃ 'me e ka kopana ka ho toba le mecha e mengata ea litaba.

Ceramic ke thepa e tsebahalang e nang le elasticity e phahameng, ho hanyetsa kutu, ho hanyetsa ho roala, ho hanyetsa tšusumetso le ho hanyetsa ho sisinyeha. Ho tsitsisa ha mocheso oa li-ceramics le khanyetso ea eona e teteaneng ea filimi e ka etsa hore mocheso oa eona oa ho sebetsa o be holimo ho 40 ~ 135 ℃, 'me o na le ho nepahala ho phahameng le botsitso ho lekanya. Tekanyo ea ho kenya motlakase> 2kV, lets'oao le matla la tlhahiso le botsitso ba nako e telele. Li-sensor tsa Ceramic tse nang le litšobotsi tse phahameng le theko e tlase e tla ba tataiso ea nts'etsopele ea li-sensor tsa khatello. Europe le Amerika, ho na le mokhoa oa ho nkela mefuta e meng ea li-sensor sebaka ka botlalo. Chaena, basebelisi ba ntseng ba eketseha ba sebelisa li-sensor tsa ceramic ho nka sebaka sa li-sensor tsa khatello ea silicon tse pharalletseng.