Dab tsi yog qhov txawv ntawm Hall Effect Speed ​​Sensors Thiab Magnetoelectric Speed ​​Sensors? Kev sib piv ntawm lawv qhov zoo thiab qhov tsis zoo.

Cov sensors ceev yog ib feem ntawm lub tsheb hluav taws xob hluav taws xob, uas siv lub luag haujlwm tseem ceeb ntawm kev hloov cov tshuab hluav taws xob rau hauv hluav taws xob teeb liab. Hall effect sensor thiab magnetoelectric sensors, raws li ob txoj hauv kev tseem ceeb, qhia qhov sib txawv tseem ceeb hauv txoj cai, kev ua haujlwm thiab daim ntawv thov scenarios. Nyob rau hauv daim ntawv no, lub hauv paus ntsiab lus kev, cov yam ntxwv tawm los, ib puag ncig adaptability, tus qauv nqi thiab cov ntawv thov raug muab piv rau qhov tob, thiab cov kev taw qhia kev xaiv yog muab rau engineering xyaum.

1.1 Magnetoelectric Sensors: Mechanical Zog Hloov raws li Electromagnetic Induction
Magnetoelectric sensors ua haujlwm los ntawm electromagnetic induction. Nws cov qauv tseem ceeb muaj cov hlau nplaum ruaj khov, coils thiab cov khoom txav xws li lub zog ceev. Thaum lub iav tig, cov hniav sib hloov thiab cov pa sib txawv yuav ua rau lub sijhawm hloov pauv ntawm qhov sib nqus Circuit Court tsis kam, uas yuav ua rau muaj kev hloov pauv ntawm cov coil flux. Raws li Faraday's electromagnetic induction txoj cai, qhov induced electromotive quab yuam generated nyob rau hauv lub kauj yog proportional rau tus nqi ntawm flux hloov, lej qhia raws li:

e=-N (dt/dΦ)
qhov twg e yog qhov induced electromotive quab yuam, N yog tus naj npawb ntawm cov kauj lem, thiab Φ yog qhov sib nqus flux. Lub hauv paus ntsiab lus no dictates tias magnetoelectric sensors yuav tsum cia siab rau qhov txheeb ze ntawm kev txav ntawm cov khoom sib nqus thiab cov khoom sib nqus, nrog rau cov teeb liab tso zis amplitude yog proportional rau rotational ceev.
1.2 Hall effect sensor: Sib nqus Field Modulation Technology raws li Hall effect
Hall effect sensor siv Hall nyhuv hauv cov khoom siv semiconductor kom ua tiav cov teeb liab hloov dua siab tshiab. Thaum qhov tam sim no dhau los ntawm Hall lub hauv paus muab tso rau hauv qhov chaw sib nqus, cov neeg nqa khoom nqa tau raug rau Lorenz quab yuam, uas deflects nws thiab tsim kom muaj qhov sib txawv ntawm cov khoom sib piv rau lub zog thiab tam sim no ntawm cov hlau nplaum (Hall voltage):

VH=KHIB/d
Qhov twg VH yog Hall voltage, KH yog Hall coefficient, Kuv yog tus tswj tam sim no, B yog lub zog magnetic teb, thiab d yog lub caij thickness. Hauv kev siv cov tswv yim, los ntawm kev txhim kho lub log tsheb (nrog cov hniav lossis cov ntiv tes) ntawm cov khoom sib nqus, lub zog hlau nplaum hloov pauv ib ntus nrog kev sib hloov ntawm lub log, yog li hloov cov cuab yeej txav mus rau hauv cov khoom siv hluav taws xob.

2.1 Magnetoelectric Sensors: Dynamic Response Yam ntxwv ntawm Analog Signals
Magnetoelectric sensors tsim ib qho kev sib txuas txuas ntxiv nrog lub waveform zoo ib yam li sine waves ntawm AC voltage. Lub amplitude ntawm lub teeb liab yog proportional rau qhov ceev. Piv txwv li, nyob rau hauv daim ntawv thov ib tug 60- hniav ceev- ntsuas iav, cov zis amplitude yuav ua tau ntau tshaj 200 mV ntawm 50 r / min. Qhov no feature muab nws qhov zoo dua nyob rau hauv high-ceev ntsuas scenarios, tab sis nws kuj muaj cov kev txwv hauv qab no:

• Kev ua haujlwm qis qis: Thaum qhov ceev tsawg dua 10 r / min, lub teeb liab amplitude ntawm lub teeb liab poob qis, ua rau txo qis hauv SNR.
• Tsis muaj zog tiv thaiv-Interference Capability: Analog signals raug cuam tshuam los ntawm electromagnetic cuam tshuam thiab yuav tsum tau tsim cov lim lim ntxiv.
• Nonlinear yuam kev: Thaum muaj kev kub ceev, qhov nce ntawm kev sib nqus Circuit Court poob ua rau saturation ntawm cov zis emf, uas ua rau nonlinear distortion.

2.2 Hall Effect Sensors: Precision Control Advantages of Digital Signals

Cov zis ntawm Hall effect sensor yog lub teeb liab tsis tu ncua square mem tes, uas nws lub luag haujlwm voj voog thiab zaus linearity muaj feem xyuam rau kev ceev. HL900G series, piv txwv li, muaj lub sijhawm teb ntawm 1.2 microseconds thiab lub sijhawm qeeb qeeb ntawm tsawg dua 0.05 degree. Kev ntsuas qhov tseeb tseem zoo dua 0.1% hauv thaj tsam 0-15,000 r / min. Cov yam ntxwv ntawm cov teeb liab digital muaj qhov zoo hauv qab no:

• High jamming tsis kam: mus txog 50 kV / m ntawm kev cuam tshuam ntawm electromagnetic cuam tshuam tuaj yeem txhawb nqa los ntawm electromagnetic shielding coatings thiab muab ob npaug rau strand output.
• Kev ua tau zoo tsawg- nrawm: cov zis ruaj khov txawm tias qhov nrawm qis li 0.1r / min.
• Kev ua cov teeb liab yooj yim: tsis xav tau cov teeb liab teeb meem nyuaj, tuaj yeem cuam tshuam ncaj qha nrog microcontroller.

3.1 Magnetoelectric Sensors: Cov muaj sia nyob hauv ib puag ncig hnyav
Magnetoelectric sensors yog tsim los ua tau zoo nyob rau hauv ib puag ncig huab, tsis muaj hluav taws xob sab nraud:
Kev hloov pauv kub: Lawv tuaj yeem ua haujlwm hauv thaj tsam ntawm -40℃txog 120 degree, nrog qee cov qauv txuas mus rau 200 degree.

• Kev ua qias tuaj tsis zoo: Lawv tsis hnov ​​​​tsw rau cov roj thiab hmoov av, ua rau lawv haum rau qhov chaw hnyav xws li lub cav ntim khoom.
• Mechanical robustness: tuaj yeem tiv taus kev vibration thiab poob siab txog 20g, raws li ISO 16750-3.

Txawm li cas los xij, lub tshuab no muaj cov teeb meem hauv qab no:

• Cua Gap Sensitivity: Qhov sib txawv ntawm qhov kawg sensor thiab lub iav ceev yuav tsum nruj me ntsis tswj nyob rau hauv 0.25-1.2 hli. Qhov sib txawv ntawm ntau tshaj 0.5 hli ua rau lub teeb liab attenuation.
• Kev txwv cov khoom siv: Cov iav ceev yuav tsum yog ua los ntawm cov khoom siv hlau nplaum, xws li cov hlau hluav taws xob, txwv tsis pub siv cov khoom tsis yog- hlau.

3.2 Hall Effect Sensors: Ib qho piv txwv ntawm Precision Manufacturing
Tag nrho- cuam tshuam sensor ua tiav hauv kev hloov pauv ib puag ncig los ntawm kev tsim qauv:

• Kev ua haujlwm kub ntau yam: siv cov hlau nplaum neodymium hlau boron thiab gallium arsenide Hall chips, lawv tswj cov zis hloov pauv tsawg dua 1% hauv qhov ntsuas kub ntawm -40 txog 150 degrees.
• Tsis yog-Kev ntsuas kev sib cuag: Lawv tuav qhov sib txawv ntawm 0.5-2 hli ntawm cov khoom ntsuas, tshem tawm qhov kev pheej hmoo ntawm kev siv tshuab.

Electromagnetic Compatibility: Qhov kev hloov pauv ntawm cov zis yog tswj tsis pub dhau ± 0.5% los ntawm GB / T 17626 tus qauv pov thawj.
Txawm li cas los xij, cov txheej txheem no yuav tsum muaj qhov raug siab heev ntawm kev teeb tsa:

• Trigger Log Zoo: Cov hniav tawg lossis deformed ntawm lub log log tuaj yeem ua rau cov teeb meem txawv txav thiab lub log lub log yuav tsum tau kuaj xyuas tsis tu ncua.
• Magnet Demagnetization Risk: Lub sij hawm ntev raug rau qhov kub thiab txias tuaj yeem ua rau cov hlau nplaum tas li poob lawv cov hlau nplaum thiab yuav tsum tau siv cov ntaub ntawv sib zog siab.

4.1 Magnetoelectric Sensors: Tsawg-Cov nqi daws teeb meem
Magnetoelectric sensors muaj cov qauv yooj yim thiab tus nqi zoo:

• Cov Nqi Khoom Siv: tooj liab coils thiab ferrite hlau nplaum yog siv, nrog rau chav tsev nqi qis dua $ 5.
• Cov txheej txheem tsim khoom: tsis tas yuav tsum muaj cov txheej txheem ntim khoom semiconductor, haum rau ntau lawm.
• Cov Nqi Them Kho: Nws cov qauv tsim tsis tas yuav hloov roj teeb li niaj zaus thiab tuaj yeem kav ntev li 10 xyoo lossis ntau dua.

Txawm li cas los xij, qhov kev daws teeb meem no los nrog cov nqi zais:

• Cov nqi ua cov khoom siv hluav taws xob: yuav tsum muaj lub tshuab hluav taws xob ntxiv thiab lim circuits, ua kom cov txheej txheem nyuaj.
• Installation thiab Debugging Nqi: Cov kev xav tau siab rau huab cua sib txawv thiab iav meshing raug yuav tsum tau tshwj xeeb calibration cuab yeej.

4.2 Hall Effect Sensors: High Precision ROI
Tag nrho - cuam tshuam sensors kev ua tau zoo los ntawm kev tsim qauv, tab sis nce nqi:

• Cov Nqi Siv Khoom: lawv siv gallium arsenide Hall chips thiab neodymium hlau boron hlau nplaum, thiab raug nqi li ntawm $ 15 txog $ 20 toj ib chav.
• Cov txheej txheem tsim khoom: ntim semiconductor thiab electromagnetic shielding kev kho mob xav tau, uas ua rau kev ua haujlwm nyuaj dua.
• Cov Nqi Them Nqi: Txawm hais tias cov teeb liab ua tiav tuaj yeem ua kom yooj yim rau peripheral circuits, lawv xav tau kev qhia txog kev sib tw) microcontrollers.

Txoj kev daws teeb meem muaj txiaj ntsig zoo dua li kev siv sijhawm ntev -:

• Cov Nqi Them Kho: Lawv tsis yog-kev sib cuag tsim tshem tawm cov khoom siv thiab tsim kua muag thiab txuas ntxiv mus txog 5 xyoos lossis ntau dua.
• Cov txiaj ntsig Precision: Kev ntsuas qhov ntsuas siab tuaj yeem ua kom zoo dua lub cav tswj lub tswv yim thiab txo cov roj noj los ntawm 2-5%.

5.1 Application Scenarios

• Traditional speedometers: Lawv siv cov teeb liab analog los tsav cov tshuab ntsuas nrawm ncaj qha, muab cov nqi qis.
• Industrial Vibration Monitoring: siv los saib xyuas kev vibration zaus ntawm lub cev muaj zog loj, compressor thiab lwm yam khoom siv.
• Tsawg tus nqi ntsuas kev ntsuas ceev: haum rau cov tshuab ua liaj ua teb thiab kev tsim kho tshuab uas tsis tas yuav muaj qhov siab.

5.2 Hall Effect Sensor Application Scenario
Automotive Electronic Systems:

• ABS Braking Systems: Lawv saib xyuas lub nrawm ntawm lub log hauv lub sijhawm tiag tiag, ua tiav ± 1% nres nres qhov tseeb.
• Kev tswj lub cav: Lawv ntes crankshaft txoj hauj lwm ntawm + -0.5 crankshaft lub kaum sab xis los txhim kho lub sij hawm ignition.
• Tsis siv neeg kis tau tus mob: Lawv pom qhov sib txawv ntawm qhov sib txawv ntawm cov tswv yim thiab cov zis tawm kom ua tiav cov lus teb ua haujlwm millisecond.

Nyob rau hauv lub teb ntawm lub zog tshiab:

• Hluav taws xob lub cev muaj zog tswj: 0-2000r / min ntsuas, lub sij hawm teb Tsawg dua los yog sib npaug rau 50 μs.
• Cua turbine bitumen systems: Lawv ntes cov kaum sab xis nrog qhov tseeb + -0.1℃thiab pom zoo tiv thaiv - electromagnetic cuam tshuam.

Nrog rau kev nce qib ntawm kev tsim hluav taws xob tsheb, ob hom kev siv thev naus laus zis tau dhau los ua ntau thiab ntau dua:

• Intelligent Magnetoelectric Sensors: Cov zis digital, xws li Bosch lub ntse magnetoelectric ceev sensors, tuaj yeem ua tiav los ntawm kev sib xyaw cov teeb liab txias chips los txhim kho kev tiv thaiv - jamming peev xwm thaum tswj kev ua haujlwm tsis zoo.
• Miniaturization ntawm Hall-Cov nyhuv Sensors: Cov txheej txheem MEMS siv los tsim cov khoom me me Hall uas tuaj yeem txo qhov loj rau 3 hli x 3 hli kom tau raws li qhov yuav tsum tau muaj ntawm cov khoom siv hluav taws xob hauv tsheb.
• Multi-Sensor Fusion: ua ke nrog Hall effect log ceev sensor thiab magneto-cov ntaub ntawv hluav taws xob vibration sensor, tsheb xwm txheej tuaj yeem saib xyuas.

Hall effect sensor thiab magnetoelectric sensors muaj lawv tus kheej kev zoo thiab daim ntawv thov ciam teb:

Hauv daim ntawv thov scenario scenario, xaiv Magnetoelectric Sensors yog tias muaj raws li hauv qab no:

• Tus nqi - cov haujlwm tseem ceeb

Thaum tshav kub kub / kev vibration ib puag ncig
Kev ntsuas kev sib hloov ceev ntawm cov khoom tsis yog -hlau

• Hauv daim ntawv thov scenario, Hall effect sensor raug xaiv yog tias muaj raws li hauv qab no:

Kev ntsuas qhov tseeb siab (yuam kev <0.5%)

Complex electromagnetic ib puag ncig

systems uas yuav tsum tau ua ncaj qha ntawm cov teeb liab.

Nyob rau hauv lub neej yav tom ntej, nrog rau kev nce qib hauv cov ntaub ntawv tshawb fawb thiab microelectronics, ob txoj kev thev naus laus zis no yuav txuas ntxiv thawb cov kev txwv lub cev thiab ua lub luag haujlwm tseem ceeb hauv nthwv dej ntawm lub tsheb hluav taws xob thiab ntse. Hauv kev xyaum ua engineering, cov kev xav tau ntawm kev ua haujlwm, kev txwv tus nqi thiab ib puag ncig ntawm ib qho kev thov tshwj xeeb yuav tsum tau soj ntsuam tag nrho txhawm rau txhawm rau ua tiav qhov kev sib tw zoo tshaj plaws rau kev daws teeb meem.