Ho tloha ho liketane tsa liroboto ho ea ho mabanta a lipalangoang ts'ebetsong ea phepelo ho ea ho litora tsa turbine tsa moea, ho lemoha boemo ke ts'ebetso ea bohlokoa mefuteng e mengata ea lits'ebetso.E ka nka mefuta e mengata, ho kenyeletsoa li-linear, rotary, angular, absolute, incremental, contact and non-contact sensors potentiometric, inductive, eddy current, capacitive, magnetostrictive, Hall effect, fiber optic, optical le ultrasonic.
FAQ ena e fana ka kenyelletso e khuts'oane ea mefuta e fapaneng ea ho lemoha maemo, ebe e hlahloba mefuta e mengata ea theknoloji eo baqapi ba ka khethang ho eona ha ba kenya tšebetsong tharollo ea boemo.
Li-sensors tsa boemo ba Potentiometric ke lisebelisoa tse thehiloeng ho hanyetsa tse kopanyang pina e tsitsitseng ea ho hanyetsa e nang le sesepa se khomaretsoeng nthong eo boemo ba eona bo hlokang ho utloahala.Motsamao oa ntho o tsamaisa li-wipers haufi le pina.Boemo ba ntho e lekanyetsoa ka ho sebelisa marang-rang a divider ea voltage e entsoeng ka liporo le li-wipers ho lekanya motsamao oa linear kapa oa rotational ka motlakase o tsitsitseng oa DC (Figuntiura 1, 1, 2000, 1, 2006) phetapheto.
Li-sensor tsa boemo ba inductive li sebelisa liphetoho tsa matla a khoheli a kentsoeng ka har'a coil ea sensor.Ho ipapisitse le meaho ea bona, li ka lekanya boemo ba linear kapa bo potolohang.Linear Variable Differential Transformer (LVDT) boemo ba li-sensor li sebelisa li-coil tse tharo tse phuthetsoeng ka har'a tube e sekoti; khoele ea mantlha le likhoele tse peli tsa bobeli li-coil, boemo bo lekanyelitsoeng ba lihlomo le hore na li khomaretsoe ho eng li ka khethoa.A rotating voltage differential transformer (RVDT) e sebelisa mokhoa o tšoanang ho latela boemo bo potolohang. Li-sensor tsa LVDT le RVDT li fana ka ho nepahala ho hotle, linearity, resolution le kutlo e phahameng.Ha li na likhohlano 'me li ka tiisoa hore li sebelisoe libakeng tse thata.
Eddy current position sensors work with conductive objects tšebelisano ea tšimo ea bobeli e hlahisoang ke maqhubu a eddy, e amang phepelo ea coil.Ha ntho e ntse e atamela haufi le coil, tahlehelo ea hona joale ea eddy e eketseha 'me motlakase oa oscillating o fetoha o monyenyane (Figure 2) .The oscillating voltage e lokisoa le ho sebetsoa ke potoloho ea linearizer ho hlahisa moeli oa DC o lekanang le sebaka sa ho hanyetsa.
Lisebelisoa tsa hona joale tsa Eddy ke lisebelisoa tse matsutla-tsutla, tse sa amaneng le batho bao hangata li sebelisoang e le li-proximity sensors. Li na le li-omnidirectional 'me li khona ho tseba sebaka se lekanyelitsoeng ho ntho, empa eseng sebaka kapa sebaka se felletseng sa ntho.
Joalo ka ha lebitso le bontša, li-capacitive position sensors li lekanya liphetoho tsa bokhoni ba ho tseba hore na ntho e utluoa ke boemo bofe.Li-sensor tsena tse sa amaneng le tsona li ka sebelisoa ho lekanya boemo ba linear kapa rotational.Li na le lipoleiti tse peli tse arohaneng ka thepa ea dielectric mme li sebelisa e' ngoe ea mekhoa e 'meli ho lemoha boemo ba ntho:
E le ho etsa hore ho be le phetoho e tsitsitseng ea dielectric, ntho eo boemo ba eona bo lokelang ho fumanoa e khomaretsoe ho thepa ea dielectric. hole, 'me phetoho ea bokhoni e sebelisoa ho fumana boemo bo lekanyelitsoeng.
Li-sensor tsa capacitive li ka lekanya ho falla, sebaka, boemo le botenya ba lintho.Ka lebaka la botsitso le tharollo ea tsona e phahameng, li-capacitive displacement sensors li sebelisoa libakeng tsa laboratori le tsa indasteri.Ka mohlala, li-sensor tsa capacitive li sebelisetsoa ho lekanya botenya ba filimi le li-adhesive applications in automated process.Mechine ea indasteri, li sebelisetsoa ho shebella ho falla le boemo ba lisebelisoa.
Magnetostriction ke thepa ea thepa ea ferromagnetic e etsang hore thepa e fetole boholo ba eona kapa sebōpeho ha ho sebelisoa matla a khoheli.Ka sensor ea boemo ba magnetostrictive, magnets ea boemo bo tsamaeang e khomaretsoe nthong e lekantsoeng. E na le waveguide e nang le lithapo tse tsamaisang maqhubu a hona joale, a kopantsoeng le sensor e teng qetellong ea waveguide ea wave3se, ha joale ho romelloa pulse ea waveguide. tšimo e bōpiloe ka terata e sebetsanang le axial magnetic field ea magnet e sa feleng (makete ka cylinder piston, Setšoantšo sa 3a) . Tšebelisano ea tšimo e bakoa ke ho sotha (phello ea Wiedemann), e senyang terata, e hlahisang pulse ea acoustic e jalang hammoho le waveguide 'me e fumanoa ke leqhubu la maqhubu a leqhubu (leqhubu le lengata). nako e ile ea feta pakeng tsa ho qalisoa ha sekhahla sa hona joale le ho lemoha sekhahla sa acoustic, boemo bo lekanyelitsoeng ba makenete ea boemo 'me kahoo ntho e ka lekanyetsoa (setšoantšo sa 3c).
Li-sensor tsa boemo ba Magnetostrictive ke li-sensor tse sa amaneng tse sebelisetsoang ho bona boemo ba linear. Hangata li-waveguides li kenngoa ka tšepe e sa hloekang kapa li-tubes tsa aluminium, tse nolofalletsang li-sensor tsena ho sebelisoa libakeng tse litšila kapa tse metsi.
Ha motlakase o mosesaane, o bataletseng o behoa sebakeng sa makenete, phallo leha e le efe ea hona joale e atisa ho haha ​​​​ka lehlakoreng le leng la mokhanni, e leng se etsang hore ho be le phapang e ka bitsoang Hall voltage. motlakase oa Holo o fetohang.Ka ho lekanya motlakase oa Holo, boemo ba ntho bo ka khethoa.Ho na le li-sensor tse khethehileng tsa Hall-effect position tse ka khethollang boemo ka litekanyo tse tharo (Figure 4). Li-sensor tsa boemo ba Hall-effect ke lisebelisoa tse sa amaneng le tse fanang ka botšepehi bo phahameng le ho utloa ka potlako, 'me li sebetsa ho feta mocheso o pharaletseng.
Ho na le mefuta e 'meli ea mantlha ea li-fiber optic sensors.Ka har'a li-intrinsic fiber optic sensors, fiber e sebelisoa e le ntho ea kutlo.Ka ntle ho li-fiber optic sensors, fiber optics e kopantsoe le theknoloji e' ngoe ea sensor ho fetisetsa lets'oao ho lisebelisoa tsa elektroniki tse hole bakeng sa ts'ebetso. optical frequency domain reflectometer.Fiber optic sensors ha e na tšitiso ea motlakase, e ka etsoa hore e sebetse ka mocheso o phahameng, 'me ha e na conductive, kahoo e ka sebelisoa haufi le khatello e phahameng kapa thepa e tukang.
Fiber-optic sensing e 'ngoe e thehiloeng ho theknoloji ea fiber Bragg grating (FBG) e ka boela ea sebelisoa bakeng sa tekanyo ea boemo.FBG e sebetsa e le sesefa sa notch, se bonahatsang karoloana e nyenyane ea leseli e shebaneng le Bragg wavelength (λB) ha e khantšitsoe ke khanya e pharaletseng. sekama, phalliso, matjato le mojaro.
Ho na le mefuta e 'meli ea li-sensor tsa boemo ba optical, tse tsejoang hape e le li-encoder tsa optical. Ketsahalong e 'ngoe, leseli le romeloa ho motho ea amohelang ka lehlakoreng le leng la sensor. li-sensor li fumaneha bakeng sa motsamao oa linear le rotary.Li-sensor tsena li oela likarolong tse tharo tse kholo; li-encoder tsa optical transmissive, li-encoder tsa optical tse bonahatsang, le li-encoder tsa interferometric optical.
Li-sensor tsa boemo ba Ultrasonic li sebelisa li-piezoelectric crystal transducers ho hlahisa maqhubu a phahameng a maqhubu a ultrasonic.Sensor e lekanya molumo o bonts'itsoeng. Li-sensor tsa Ultrasonic li ka sebelisoa e le li-proximity sensors tse bonolo, kapa liqapi tse rarahaneng li ka fana ka lintlha tse fapaneng. Mehlala ea lits'ebetso tse sebelisang li-sensor tsa boemo ba ultrasonic li kenyelletsa ho lemoha boemo ba mokelikeli, ho bala ka lebelo le phahameng la lintho, liroboto tsa navigation system, le automotive sensing. le lipontšo tsa ho sebetsa (Setšoantšo sa 5).
Li-sensor tsa boemo li ka lekanya motsamao o felletseng kapa o lekanyelitsoeng, oa ho potoloha le oa angular oa lintho.
3D Magnetic Position Sensors, Allegro MicrosystemsHo Hlahlobisisa le Ntlafatso ea Tšireletseho ea Li-sensors tsa Ultrasonic bakeng sa Likoloi tse Ikemetseng, IEEE Internet of Things Journal Mokhoa oa ho khetha sensor ea boemo, Cambridge Integrated CircuitsPosition sensor types, Ixthus InstrumentationSensor ea boemo bo inductive ke eng?, PosinesensitiveK, PosineSeoth, MagsineTEK ke eng?
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Seboka se holimo sa lefats'e sa EE se rarollang mathata se akaretsang li-microcontrollers, DSP, marang-rang, moralo oa analog le dijithale, RF, lisebelisoa tsa elektroniki tsa motlakase, PCB routing, le tse ling.
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